Electronic device

Abstract

The present application relates to the technical field of terminals. Provided is an electronic device, which can solve the new acoustic problem caused by an open front cavity. The electronic device comprises a first structural member, a middle frame, a second structural member, a sound production device and a support member, wherein the middle frame comprises an annular frame, and a middle plate located within the frame; the first structural member and the second structural member are respectively located on two sides of the middle plate in the direction of thickness of the electronic device; the frame, the first structural member and the second structural member enclose a cavity; the sound production device is located in the cavity and is located on the side of the middle plate facing away from the first structural member; the sound production device is in communication with the first structural member by means of an opening at the position of the middle plate corresponding to the sound production device; and the support member is located between the sound production device and the first structural member, and covers part of the opening.

Description

Electronic device

[0001] The present application claims priority to the Chinese patent application No. 202411049633.1, filed on July 31, 2024, and entitled "Electronic device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of terminals, and in particular to an electronic device. BACKGROUND

[0003] Speaker and earpiece and other sound generating devices are widely used in various electronic devices (such as mobile phones, tablet computers and other terminals) as electro-acoustic transducers.

[0004] With the development of thin and light electronic devices, the thickness of the electronic device is gradually reduced, which reduces the height of the front cavity of the sound generating device, thereby causing abnormal audio playback, such as the occurrence of noise, abnormally small sound, or uneven sound playback. To this end, the related art opens a slot on the middle frame to make the sound generating device communicate with the screen or back cover and other structural members to realize an open front cavity, thereby increasing the height of the front cavity. However, the open front cavity brings new acoustic problems. SUMMARY

[0005] The present application provides an electronic device that can solve the new acoustic problems brought by the open front cavity.

[0006] In a first aspect, an electronic device is provided. The electronic device includes a first structural member, a middle frame, a second structural member, a sound generating device, and a support member. The middle frame includes a ring-shaped bezel and a middle plate located in the bezel. In a first direction, the first structural member and the second structural member are located on two sides of the middle plate, respectively. The bezel, the first structural member, and the second structural member surround to form a cavity. The sound generating device is located in the cavity and on a side of the middle plate away from the first structural member. The middle plate is provided with an opening hole corresponding to the position of the sound generating device. The sound generating device and the first structural member are in communication through the opening hole to form a front cavity of the sound generating device. The support member is located between the sound generating device and the first structural member and covers a part of the opening hole.

[0007] In this way, the sound generating device is in communication with the first structural member, and a front cavity is directly formed. A fixed support is arranged between the sound generating device and the first structural member, thereby preventing the first structural member from being pressed and recessed at the front cavity, and further avoiding irregular vibration of the diaphragm of the sound generating device due to the change in air pressure caused by the pressed recess in the front cavity, so as to solve the problem of noise, i.e., the problem of pressed abnormal sound. Meanwhile, along the first direction (i.e., the thickness direction of the electronic device), the sound generating device overlaps the projection area of the first opening on the middle frame, thereby reducing the overhanging area of the first structural member at the first opening. In this way, the vibration mode of the first structural member is changed, so that the vibration frequency of the first structural member avoids the frequency range in which the sound generating device normally operates, thereby solving the problem of front cavity resonance.

[0008] For example, the electronic device can be a foldable electronic device. When the electronic device is a foldable electronic device, the first structural member can be an inner screen, the second structural member can be an outer screen, the middle frame can be a first middle frame, the middle plate can be a first middle plate, and the bezel can be a first bezel.

[0009] For example, the electronic device can be a foldable electronic device. When the electronic device is a foldable electronic device, the first structural member can be an inner screen, the second structural member can be an outer screen, the middle frame can be a first middle frame, the middle plate can be a first middle plate, and the bezel can be a first bezel.

[0010] For example, the first structural member can be a plastic battery cover, and the second structural member can be a display screen.

[0011] For example, the electronic device can be a non-foldable electronic device. When the electronic device is a non-foldable electronic device, the first structural member can be a flexible display screen, and the second structural member can be a back cover.

[0012] For example, the sound generating device can be a loudspeaker module or an earpiece.

[0013] According to the first aspect, or any one of the implementations of the first aspect, the support is fixed to the middle plate. In this way, the support is fixed in position while being closer to the first structural member, thereby effectively preventing the first structural member from being pressed and recessed, and solving the problem of pressed abnormal sound.

[0014] According to the first aspect, or any one of the implementations of the first aspect, the support is integrally formed with the middle plate. In this way, a part of the middle plate is reused as the support, thereby saving process materials and reducing material costs.

[0015] According to the first aspect, or any one of the implementations of the first aspect, the support member is independent of the middle plate. In this way, the support member can be made thinner, thereby increasing the overall height of the front cavity and improving the audio performance.

[0016] For example, the support member is an aluminum alloy sheet, an aluminum-magnesium alloy sheet, or a titanium alloy sheet. In this way, the rigidity of the support member can be enhanced while reducing the thickness of the support member, so that the support member is not deformed when pressed by the first structural member, thereby avoiding the pressing noise caused by the deformation of the support member.

[0017] According to the first aspect, or any one of the implementations of the first aspect, the electronic device further includes a battery and a battery cover plate, the battery cover plate is located between the battery and the first structural member in the first direction; the battery cover plate includes an extension portion extending to the projection area of the opening, and the extension portion is the support member. In this way, by extending the battery cover plate and using the extension portion of the battery cover plate as the support member, the battery cover plate can protect the battery while solving the pressing noise and front cavity resonance problems of the open front cavity structure. Moreover, the battery cover plate and the support member can be manufactured in the same process flow, thereby saving the process flow and reducing the process cost.

[0018] According to the first aspect, or any one of the implementations of the first aspect, the support member is in a strip shape, the frame is provided with a sound outlet, and the extension direction of the support member is a direction from the front cavity to the sound outlet. In this way, the support member does not block the airflow carrying sound waves, and the audio can be normally played.

[0019] According to the first aspect, or any one of the implementations of the first aspect, the number of support members is one.

[0020] According to the first aspect, or any one of the implementations of the first aspect, the sound generating device includes a core, the core includes a diaphragm group and a magnetic circuit system, the magnetic circuit system is located on a side of the diaphragm group away from the first structural member, the diaphragm group includes a diaphragm and a ball top, and the diaphragm is arranged around the ball top; the ball top includes a main body portion and a sink, at least part of the main body portion protrudes toward the first structural member and is located in a region where the opening and the support member do not overlap, and the sink protrudes toward the magnetic circuit system, the sink penetrates the ball top in the extension direction of the support member and covers the support member; the thickness of the magnetic circuit system corresponding to at least part of the position of the main body portion is greater than the thickness of the magnetic circuit system corresponding to the position of the sink. In this way, by increasing the thickness of the magnetic circuit system, the BL of the power conversion coefficient is greater, and in the case that the driving current I is unchanged, the driving force BIL of the sound generating device is greater, so that the low-frequency performance of the sound generating device is improved. Alternatively, in the case that the driving force BIL of the sound generating device is unchanged, the driving current I can be reduced, thereby reducing the power consumption.

[0021] Exemplarily, the magnetic circuit system comprises the magnet and the magnetic conductive plate stacked along the first direction; the thickness of the magnet corresponding to at least part of the position of the main body part is greater than the thickness of the magnet corresponding to the position of the sink.

[0022] Exemplarily, the thickness of the magnetic conductive plate corresponding to at least part of the position of the main body part is greater than the thickness of the magnetic conductive plate corresponding to the position of the sink.

[0023] Exemplarily, the thickness of the magnet corresponding to at least part of the position of the main body part is greater than the thickness of the magnet corresponding to the position of the sink, and the thickness of the magnetic conductive plate corresponding to at least part of the position of the main body part is greater than the thickness of the magnetic conductive plate corresponding to the position of the sink.

[0024] According to the first aspect, or any one of the implementations of the first aspect, the inner core further comprises a protruding part, the protruding part is located on the side of the magnetic circuit system facing the first structural member, the protruding part protrudes towards the first structural member relative to the diaphragm group and is fixed in position; the protruding part is fixedly connected with the support member. In this way, the support member and the inner core form a larger rigid body, so that the first structural member can be better prevented from being pressed and recessed, and the pressing abnormal sound and the front cavity resonance of the open front cavity structure are solved.

[0025] According to the first aspect, or any one of the implementations of the first aspect, the inner core further comprises a protruding part, the protruding part is located on the side of the magnetic circuit system facing the first structural member, the protruding part protrudes towards the first structural member relative to the diaphragm group and is fixed in position; the protruding part is fixedly connected with the first structural member, and the protruding part is the support member. In this way, the protruding part of the inner core is directly used as the support member, so that the pressing abnormal sound and the front cavity resonance of the open front cavity structure are solved, and the hardware cost of the support member can be saved.

[0026] Exemplarily, the inner core comprises a first sound generating unit and a second sound generating unit, the first sound generating unit comprises a first diaphragm group, a first voice coil and a first magnetic circuit system, the second sound generating unit comprises a second diaphragm group, a second voice coil and a second magnetic circuit system; the inner core further comprises a yoke, the first sound generating unit and the second sound generating unit are fixed on the yoke, the yoke comprises a peripheral part and an intermediate part located in the peripheral part and connected with the peripheral part, the intermediate part separates the first sound generating unit and the second sound generating unit; the intermediate part is the protruding part.

[0027] Exemplarily, the spherical top is annular, and the spherical top surrounds the outer periphery of the protruding part. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a structural diagram of an electronic device in an unfolded state according to an embodiment of the present application;

[0029] FIG. 2 is a structural diagram of the electronic device in a folded state according to an embodiment of the present application;

[0030] FIG. 3 is a perspective view of a support device in the electronic device according to an embodiment of the present application;

[0031] Fig. 4 is an exploded view of a partial structure of the electronic device shown in Fig. 1;

[0032] Fig. 5 is a perspective view of a loudspeaker module according to an embodiment of the present application;

[0033] Fig. 6 is an exploded view of the loudspeaker module shown in Fig. 5;

[0034] Fig. 7 is a schematic view of a structure of a core according to an embodiment of the present application;

[0035] Fig. 8 is an exploded view of the core shown in Fig. 7;

[0036] Fig. 9 is a sectional view of the core shown in Fig. 7 at A-A;

[0037] Fig. 10 is a sectional view of the electronic device shown in Fig. 1 at B-B;

[0038] Fig. 11 is another sectional view of the electronic device shown in Fig. 1 at B-B;

[0039] Fig. 12 is a sectional view of the electronic device shown in Fig. 1 at C-C;

[0040] Fig. 13 is a sectional view of the electronic device shown in Fig. 1 in the direction of B-B;

[0041] Fig. 14 is a perspective view of a core according to another embodiment of the present application;

[0042] Fig. 15 is a sectional view of the core according to another embodiment of the present application;

[0043] Fig. 16 is a sectional view of another core according to an embodiment of the present application;

[0044] Fig. 17 is a perspective view of another core according to an embodiment of the present application;

[0045] Fig. 18 is a sectional view of the core shown in Fig. 17 at C-C of the electronic device shown in Fig. 1;

[0046] Fig. 19 is a perspective view of another core according to an embodiment of the present application;

[0047] Fig. 20 is a sectional view of the core shown in Fig. 19;

[0048] Fig. 21 is a sectional view of the core shown in Fig. 19 at B-B of the electronic device shown in Fig. 1;

[0049] Fig. 22 is a sectional view of the core shown in Fig. 19 at C-C of the electronic device shown in Fig. 1.

[0050] Label: 1, electronic device; 10, support device; 11, first middle frame; 12, second middle frame; 13, rotating mechanism; 14, back cover; 111, first middle plate; 112, first side frame; 11a, sound hole; 1111, opening; 20, screen assembly; 21, inner screen; 22, outer screen; 211, first part; 212, second part; 213, third part; 30, circuit board; 40, battery; 41, battery cover plate; 411, extension; 50, loudspeaker module; 50a, sound outlet channel; 51, shell; 52, inner core; 51a, fixed part; 511, front shell; 512, rear shell; 5111, first cover plate; 5112, first side frame; 5121, flat plate part; 5122, second side frame; 521, yoke; 523, magnetic circuit system; 522, vibration system; 5211, top end face; 5212, bottom end face; 5223, voice coil; 5221, diaphragm; 5222, ball top; 52221, overlapping edge; 52222, main body part; 52223, sink; 5222a, first surface; 5222b, second surface; 52222a, first recessed part; 5231, magnet; 5232, first magnetic conducting plate; 5233, second magnetic conducting plate; 52311, center magnet; 52312, edge magnet; 52331, center magnetic conducting plate; 52332, ring-shaped magnetic conducting plate; 52331a, second recessed part; 5101, first sound generating unit; 5102, second sound generating unit; 5100, protruding part; 60, support piece. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0052] The term "and / or" in this document merely describes an association relationship of associated objects, and indicates that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone.

[0053] The terms "first" and "second" and the like in the specification and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of the objects. For example, the first target object and the second target object are used to distinguish different target objects, rather than to describe a specific order of the target objects.

[0054] In the embodiments of the present application, the word "exemplary" or "for example" is used to mean serving as an example, instance, or illustration. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "for example" is intended to present concepts in a concrete manner.

[0055] In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise specified. For example, a plurality of processing units means two or more processing units; a plurality of systems means two or more systems.

[0056] The speaker module is an important acoustic component of a portable electronic device, which serves as an electro-acoustic transducer for converting electrical signals into acoustic signals. With the development of thin and light electronic devices such as mobile phones and tablet computers, the size design of the speaker module is becoming more and more challenging. At the same time, consumers have increasingly high performance requirements for electronic devices, and the speaker module needs to achieve better sound experience.

[0057] The present application provides an electronic device, which is a kind of electronic device with a speaker module. Exemplarily, the electronic device includes but is not limited to a mobile phone, a tablet personal computer, a laptop computer, a personal digital assistant (PDA), a personal computer, a notebook computer, a vehicle-mounted device, a wearable device (including but not limited to a smart bracelet, a smart watch, a smart head-mounted display, smart glasses, etc.), a portable music player, a radio, a television, a sound box, etc.

[0058] Among them, the electronic device can be a foldable electronic device (for example, a foldable mobile phone), for which the foldable electronic device can be unfolded to an unfolded state or folded to a folded state under different use requirements. Of course, the electronic device can also be a non-foldable electronic device, such as a straight mobile phone.

[0059] FIG. 1 is a structural diagram of an electronic device in an unfolded state according to an embodiment of the present application. Referring to FIG. 1, the electronic device 1 in this embodiment is taken as an example of a foldable mobile phone. The electronic device 1 in FIG. 1 is in an unfolded state, and the electronic device 1 includes a support device 10 and a screen assembly 20, and the screen assembly 20 includes an inner screen 21 and an outer screen 22.

[0060] It can be understood that FIG. 1 only schematically shows some components included in the electronic device 1, and the actual shape, actual size, actual position, and actual structure of these components are not limited by FIG. 1.

[0061] The screen assembly 20 can be used to display information and provide an interactive interface for a user. In embodiments of the present application, the inner screen 21 is a flexible display screen, for example, an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode display screen, a micro organic light-emitting diode display screen, a micro organic light-emitting diode display screen, or a quantum dot light emitting diode (QLED) display screen. The outer screen 22 can be a flexible display screen or a non-flexible display screen.

[0062] The inner screen 21 can be switched between an unfolded state and a folded state. When in the folded state, the inner screen 21 can be folded into a first portion 211 and a second portion 212. The inner screen 21 further includes a third portion 213 between the first portion 211 and the second portion 212. When the inner screen 21 is in the unfolded state, the first portion 211, the second portion 212, and the third portion 213 are coplanar and face the same direction. In this state, large-screen display can be achieved, and more information can be provided to the user, resulting in a better user experience.

[0063] FIG. 2 is a structural diagram of the electronic device shown in FIG. 1 in a folded state. In combination with FIGS. 1 and 2, the electronic device 1 in the figure is in a folded state. When the inner screen 21 is in the folded state, the third portion 213 is in a folded state, and the first portion 211 (not shown in FIG. 2) is opposite the second portion 212 (not shown in FIG. 2). In this state, the inner screen 21 is not visible to the user.

[0064] The support device 10 is used to support the inner screen 21 and the outer screen 22 and allow the inner screen 21 to be switched between the unfolded state and the folded state. FIG. 3 is a perspective view of the support device in the electronic device shown in FIG. 1. Referring to FIG. 3, the support device 10 includes a middle frame, a rotating mechanism 13, and the back cover 14 in FIG. 2. The middle frame includes a first middle frame 11 and a second middle frame 12. It can be understood that FIG. 3 only schematically shows some components included in the support device 10, and the actual shape, actual size, actual position, and actual structure of these components are not limited by FIG. 3.

[0065] The support device 10 has a support surface which can be used to support the inner screen 21. With the support of the support surface, the inner screen 21 can be made flat and the display surface of the inner screen 21 can be made planar in the unfolded state.

[0066] The first middle frame 11 has a side for fixing and supporting the first part 211 of the inner screen 21 in FIG. 1. Specifically, the first middle frame 11 has a support surface M1, and the first middle frame 11 fixes and supports the first part 211 of the inner screen 21 in FIG. 1 through the support surface M1. Exemplarily, the connection relationship between the support surface M1 and the first part 211 includes but is not limited to adhesion. The other side of the first middle frame 11 is used to fix the outer screen. The second middle frame 12 has a side for fixing and supporting the second part 212 of the inner screen 21 in FIG. 1. Specifically, the second middle frame 12 has a support surface M2, and the second middle frame 12 fixes and supports the second part 212 of the inner screen 21 in FIG. 1 through the support surface M2. Exemplarily, the connection relationship between the support surface M2 and the second part 212 includes but is not limited to adhesion. The other side of the second middle frame 12 is connected to the back cover 14. The rotating mechanism 13 is used to support the third part 213 of the inner screen 21. Moreover, the rotating mechanism 13 is connected between the first middle frame 11 and the second middle frame 12, and the first middle frame 11 and the second middle frame 12 are rotatably connected through the rotating mechanism 13, so as to realize the relative rotation between the first middle frame 11 and the second middle frame 12.

[0067] FIG. 4 is an exploded view of part of the structure of the electronic device shown in FIG. 1. Referring to FIG. 4, the exploded structure of the side of the first middle frame 11 of the support device 10 is shown, and the electronic device 1 further includes a circuit board 30, a battery 40, a battery cover plate (not shown in the figure), an earpiece (not shown in the figure), and a speaker module 50. The battery cover plate is located at the mounting position of the battery 40 and at the side of the battery 40 facing the inner screen, and mainly serves to protect the battery 40. The first middle frame 11 includes a first middle plate 111 and a first bezel 112 surrounding the periphery of the first middle plate 111. The inner screen 21, the outer screen 22, and the first bezel 112 surround to form a first cavity, which can be used to accommodate the circuit board 30, the battery 40, and the speaker module 50. It can be understood that the second middle frame can include a second middle plate and a second bezel surrounding the periphery of the second middle plate. The inner screen, the back cover, and the second bezel surround to form a second cavity. The circuit board 30, the battery 40, and the speaker module 50 can also be located in the second cavity. Alternatively, the circuit board 30 and the speaker module 50 are located in the first cavity, and the battery 40 is located in the second cavity. Alternatively, the circuit board 30 is located in the first cavity, and the first cavity and the second cavity are both provided with the battery 40 and the speaker module 50, and the like. Hereinafter, the circuit board 30, the battery 40, and the speaker module 50 are taken as examples for description.

[0068] The first middle frame 11 is generally in the shape of a cuboid. In order to facilitate the description of the embodiments below, an XYZ coordinate system is established. Specifically, the width direction of the first middle frame 11 is defined as the X-axis direction, the length direction of the first middle frame 11 is defined as the Y-axis direction, and the thickness direction of the first middle frame 11 is defined as the Z-axis direction. The X-axis, the Y-axis and the Z-axis are perpendicular to each other. It can be understood that the coordinate system of the first middle frame 11 can be flexibly set according to actual needs, which is not specifically limited here.

[0069] The circuit board 30 is used to integrate a control chip. The circuit board can be fixed in the first cavity by screw connection, clamping, gluing or welding and the like. In some embodiments, the circuit board 30 is electrically connected with the screen assembly 20, and the circuit board 30 is used to control the screen assembly 20 to display images or videos. The circuit board 30 can be a hard circuit board, or a flexible circuit board, or a soft and hard combined circuit board.

[0070] The battery 40 is fixed in the first cavity. For example, the battery 40 is fixed in the first cavity by clamping, gluing or screw connection and the like. The battery 40 is used to provide power for the circuit board 30, the screen assembly 20, the loudspeaker module 50 and the like.

[0071] The loudspeaker module 50 is used to restore audio electrical signals such as music and voice into sound, so that the electronic device 1 can support audio external playing. In the Z-axis direction, the loudspeaker module 50 is located on the side of the first middle plate 111 away from the inner screen 21 (i.e. the side opposite to the supporting surface M1 in FIG. 3). The loudspeaker module 50 is electrically connected with the circuit board 30. Specifically, the loudspeaker module 50 has a sound outlet channel 50a. The sound signal output by the loudspeaker module 50 is output by the sound outlet channel 50a. The side edge of the first side frame 112 is provided with a sound outlet hole 11a. The sound outlet hole 11a is in communication with the sound outlet channel 50a. The sound signal output by the sound outlet channel 50a is further output to the outside of the electronic device 1 by the sound outlet hole 11a. The sound outlet hole 11a can be located on the short side frame (i.e. the side edge frame opposite in the X-axis direction) of the first side frame 112. Alternatively, the sound outlet hole 11a can also be located on the long side frame (i.e. the side edge frame opposite in the Y-axis direction) of the first side frame 112. The embodiments of the present application are described by taking the example that the sound outlet hole 11a is located on the short side frame of the first side frame 112.

[0072] It should be noted that in the electronic device, the loudspeaker module 50 can be multiple. In some embodiments, in the Z-axis direction, the loudspeaker module 50 can also be located on the side of the second middle plate away from the inner screen 21. The embodiments of the present application are described by taking the example that the loudspeaker module 50 is located on the side of the first middle plate 111 away from the inner screen 21.

[0073] The loudspeaker module 50 is described in detail below.

[0074] FIG. 5 is a perspective view of a loudspeaker module according to an embodiment of the present application; and FIG. 6 is an exploded view of the loudspeaker module shown in FIG. 5. Referring to FIGS. 5 and 6, the loudspeaker module 50 includes a housing 51 and a core 52. The core 52 is arranged in the housing 51, and the housing 51 can serve to fix and protect the core 52. The housing 51 is provided with a sound outlet 50a, and the sound generated by the core 52 can be transmitted to the outside of the housing 51 through the sound outlet 50a.

[0075] It should be noted that FIGS. 5 and 6 only schematically show some components included in the loudspeaker module 50, and the actual shape, actual size, actual position and actual structure of these components are not limited by FIGS. 5 and 6. In addition, the coordinate system in FIG. 5 is the same as the coordinate system in FIG. 4. That is, the positional relationship of each component in the loudspeaker module 50 in the coordinate system shown in FIG. 5 is the same as the positional relationship of each component in the loudspeaker module 50 in the coordinate system shown in FIG. 4 when the loudspeaker module 50 is applied to the electronic device 1 shown in FIG. 4.

[0076] The housing 51 is provided with a fixing portion 51a. The fixing portion 51a includes, but is not limited to, a through hole, a threaded hole, a buckle, a clamping groove, a limiting step, etc. In the embodiment shown in FIGS. 5 and 6, the fixing portion 51a includes two through holes. The through holes are used to cooperate with screws to fix the loudspeaker module 50 to the first middle frame in the electronic device 1 shown in FIG. 1.

[0077] The material of the housing 51 includes, but is not limited to, metal and plastic. In some embodiments, the material of the housing 51 is plastic. The cost of plastic is low, and plastic is easy to be molded, which is beneficial to reduce the processing cost of the loudspeaker module 50.

[0078] The housing 51 can be a structural whole or can be assembled by multiple parts. In some embodiments, the housing 51 includes a front housing 511 and a rear housing 512. The housing 51 is assembled by the front housing 511 and the rear housing 512, which is beneficial to reduce the molding difficulty and assembly difficulty of the housing 51.

[0079] Specifically, the front housing 511 includes a first cover plate 5111 and a first side frame 5112. The first side frame 5112 is arranged around the edge of the first cover plate 5111, and one end of the first side frame 5112 is connected to the first cover plate 5111 and the other end extends away from the first cover plate 5111. The first side frame 5112 is provided with a first step surface at the end away from the first cover plate 5111. The first step surface is arranged around the first side frame 5112. The front housing 511 is fixed to the rear housing 512 in FIG. 4 by means of the first step surface.

[0080] The rear shell 512 includes a flat plate portion 5121 and a second side frame 5122 arranged on an inner surface of the flat plate portion 5121, and the second side frame 5122 is fixed to the first step surface of the front shell 511. The rear shell 512 and the front shell 511 form a receiving space therebetween. In this way, the front shell 511 and the rear shell 512 are assembled, and the structure is simple, which is conducive to reducing the difficulty of molding and assembling the shell 51. The inner surface of the flat plate portion 5121 refers to a side surface of the flat plate portion 5121 facing the interior space of the shell 51.

[0081] The inner core 52 is arranged in the receiving space and divides the receiving space into a front cavity and a rear cavity. Specifically, the inner core 52 is arranged in the front shell 511. The inner core 52 has a fixing surface formed by an outer edge portion of a diaphragm (to be described below). The inner core 52 is fixed to the front shell 511 by means of the fixing surface. The front shell 511 has a second step surface, and the shape and size of the second step surface are adapted to the shape and size of the fixing surface. Specifically, the second step surface is arranged on an inner surface of the first side frame 5112. The inner surface of the first side frame 5112 refers to a side surface of the first side frame 5112 facing the interior space of the shell 51. The fixing surface of the inner core 52 is fixed to the second step surface. In this way, the inner core 52 can be arranged in the front shell 511 and fixed to the front shell 511.

[0082] The inner core 52 is arranged in the front shell 511, and in the Z-axis direction, the inner core 52 is stacked with the first cover plate 5111 of the shell 51, and the first cover plate 5111 is located on a side of the inner core 52 facing the inner screen, and the first cover plate 5111 is located on a side of the first middle plate facing away from the inner screen (i.e., a side opposite to the support surface M1 of the first side frame 11 in FIG. 3). The inner core 52, part of the first side frame 5112, and the first cover plate 5111 form a front cavity therebetween, and the rear shell 512 and part of the first side frame 5112 form a rear cavity therebetween. The first side frame 5112 is provided with a sound outlet channel 50a, and the sound outlet channel 50a is in communication with the front cavity 501. The airflow formed by the front cavity 501 of the loudspeaker module 50 can be guided out of the sound outlet channel 50a to form sound. The sound outlet channel 50a is in communication with the sound hole 11a on the first middle frame of the electronic device 1 shown in FIG. 1.

[0083] The inner core 52 will be described in detail below.

[0084] It should be noted that when describing each component in the inner core 52 below, the "top" refers to the part of the described component facing the front cavity, and the "bottom" refers to the part of the described component facing away from the front cavity.

[0085] In addition, the shape of each component in the inner core 52 described below is "rectangular", which refers to the approximate shape, and adjacent two sides can have or not have rounded corners.

[0086] Fig. 7 is a structural schematic diagram of a core provided by an embodiment of the present application; and Fig. 8 is an exploded view of the core shown in Fig. 7. Referring to Figs. 7 and 8, the core 52 includes a basket 521, a magnetic circuit system 523, and a vibration system 522. The magnetic circuit system 523 is configured to generate a magnetic field, and the vibration system 522 is configured to vibrate under the action of the magnetic field and push the air in the front cavity to vibrate, thereby outputting a sound signal. The basket 521 serves as a basic support structure of the core 52 and is configured to support the vibration system 522 and fix the magnetic circuit system 523, so that the vibration system 522 vibrates stably and the magnetic circuit system 523 can generate a stable magnetic field. For example, the material of the basket 521 includes but is not limited to metal or plastic.

[0087] Referring to Fig. 8, the two side surfaces of the basket 521 in the Z-axis direction are a top end surface 5211 and a bottom end surface 5212. The top end surface 5211 and the bottom end surface 5212 are annular surfaces arranged around the periphery of the basket 521. The vibration system 522 can be supported on the top end surface 5211 of the basket 521, and the magnetic circuit system 523 can be fixed to the bottom end surface 5212 of the basket 521. The vibration system 522 and the magnetic circuit system 523 have a gap therebetween, and the gap forms a rear cavity of the loudspeaker module 50.

[0088] Fig. 9 is a sectional view of the core shown in Fig. 7 at A-A. Referring to Fig. 9, the vibration system 522 includes a diaphragm group and a voice coil 5223. The edge of the diaphragm group is connected to the top end surface 5211 of the basket 521, and the diaphragm group covers the entire area surrounded by the top end surface 5211 of the basket 521. The diaphragm group divides the space in the shell 51 of the loudspeaker module 50 into a front cavity and a rear cavity. The outer surface of the diaphragm group (the side surface of the diaphragm group facing away from the magnetic circuit system 523) and the shell 51 form the front cavity, and the inner surface of the diaphragm group (the side surface of the diaphragm group facing the magnetic circuit system 523) and the magnetic circuit system 523 and the basket 521 form the rear cavity. The voice coil 5223 is arranged in the Z-axis direction of the core 52. The top end of the voice coil 5223 is connected to the inner surface of the diaphragm group, and the bottom end of the voice coil 5223 is suspended.

[0089] The magnetic circuit system 523 is provided with an annular magnetic gap, and the bottom end of the voice coil 5223 extends into the annular magnetic gap. The magnetic circuit system 523 can generate a closed magnetic circuit as shown by the arrow direction in Fig. 9, and the voice coil 5223 with the bottom end extending into the annular magnetic gap is located in the magnetic circuit generated by the magnetic circuit system 523. When the voice coil 5223 is energized, the voice coil 5223 is subjected to an Ampere force in the axial direction thereof under the action of the magnetic field in the annular magnetic gap. The Ampere force F = BLI, where B is the magnetic induction intensity of the magnetic field in the annular magnetic gap, L is the wire length of the voice coil 5223, and I is the current intensity of the wire of the voice coil 5223. Under the action of the Ampere force, the voice coil 5223 can move in the axial direction thereof to drive the diaphragm group to vibrate.

[0090] It should be noted that the audio effect of the loudspeaker module 50, especially the low frequency performance, is mainly determined by the vibration amplitude of the diaphragm group of the inner core 52, and the vibration amplitude of the diaphragm group is determined by the moving space of the voice coil 5223, that is, the greater the moving space of the voice coil 5223, the greater the vibration amplitude of the diaphragm group, and the better the low frequency performance of the loudspeaker module 50. Therefore, the greater the ampere force F, the greater the driving force acting on the voice coil 5223, so that the voice coil 5223 moves along its axial direction. The greater the space, the greater the vibration amplitude of the diaphragm group driven by the diaphragm group, and the better the low frequency performance of the loudspeaker module 50. In this regard, the ampere force F can be increased by increasing the value of at least one of the parameters B, I and L. For example, on the one hand, the ampere force F can be increased by increasing the current intensity input by the electronic device to the voice coil 5223. On the other hand, the greater the volume of the magnetic circuit system 523 (including the volume of the magnet and / or the volume of the second magnetic conductive plate below), the greater the power conversion coefficient BL. Therefore, the ampere force F can also be increased by increasing the volume of the magnetic circuit system 523.

[0091] The diaphragm group of the vibration system 522 includes a diaphragm 5221 and a dome 5222. The diaphragm 5221 is a flexible structure, for example, the diaphragm 5221 is in the shape of a rectangular ring, and the outer edge of the diaphragm 5221 is connected to the top end surface 5211 of the basket 521. The dome 5222 is a rigid structure, for example, the dome 5222 is in the shape of a rectangular plate, and the outer edge of the dome 5222 is connected to the inner edge of the diaphragm 5221.

[0092] In this embodiment, the two opposite side surfaces of the dome 5222 are defined as a first surface 5222a and a second surface 5222b, respectively. The second surface 5222b is the side surface of the dome 5222 facing the vibration system 522. In order to ensure the reliability of the connection between the diaphragm 5221 and the dome 5222, the inner edge of the diaphragm 5221 can be connected to the first surface 5222a of the lap joint 52221 of the dome 5222. The voice coil 5223 is connected to the second surface 5222b of the dome 5222. When the inner core 52 is working, the voice coil 5223 moves up and down along its axial direction under the action of the magnetic field in the annular magnetic gap. The voice coil 5223 drives the dome 5222 to move up and down. The outer edge of the diaphragm 5221 is fixedly connected to the basket 521, and the inner edge of the diaphragm 5221 can move with the dome 5222. Therefore, the diaphragm 5221 swings with the movement of the dome 5222 and limits the displacement of the dome 5222. The diaphragm group vibrates as a whole with the movement of the voice coil 5223.

[0093] To increase the strength of the ball top 5222, in some embodiments, the ball top 5222 has a first recess 52222a recessed towards the vibration system 522. The first recess 52222a can be annular.

[0094] The magnetic circuit system 523 can include a magnet 5231, a first magnetic conducting plate 5232 and a second magnetic conducting plate 5233, the first magnetic conducting plate 5232 and the second magnetic conducting plate 5233 are respectively arranged on both sides of the magnet 5231. The magnet 5231 is used to generate a magnetic field, the first magnetic conducting plate 5232, the magnet 5231 and the second magnetic conducting plate 5233 jointly form a magnetic circuit to drive the voice coil 5223 to move up and down along its axial direction. The magnet 5231 can include a center magnet 52311 and a side magnet 52312, the center of the center magnet 52311 can be located on the central axis of the voice coil 5223, the side magnet 52312 is arranged around the periphery of the center magnet 52311, and the center magnet 52311 and the side magnet 52312 have a gap therebetween, which forms an annular magnetic gap. The magnetic circuit is formed between the center magnet 52311 and the side magnet 52312, in order to make the voice coil 5223 in a balanced magnetic field, the side magnet 52312 around the periphery of the center magnet 52311 should be symmetrically arranged with the center of the center magnet 52311 as the center. The first magnetic conducting plate 5232 is located on the side of the magnet 5231 away from the vibration system 522, and the first magnetic conducting plate 5232 is in magnetic contact with the center magnet 52311 and the side magnet 52312 and is fixed together. The second magnetic conducting plate 5233 is located on the side of the magnet 5231 towards the vibration system 522, in some embodiments, the second magnetic conducting plate 5233 includes a center magnetic conducting plate 52331 and an annular magnetic conducting plate 52332. The center magnetic conducting plate 52331 is arranged on the center magnet 52311 and in magnetic contact with the center magnet 52311; the annular magnetic conducting plate 52332 is annularly arranged on the outer periphery of the center magnetic conducting plate 52331, and the annular magnetic conducting plate 52332 is arranged on the side magnet 52312 and in magnetic contact with the side magnet 52312.

[0095] In addition, a second recess 52331a can be formed on the side surface of the central magnetic plate 52331 facing the dome 5222. In the case where a first recess 52222a is provided on the dome 5222 that is recessed into the magnetic circuit system 523, a second recess 52331a is provided on the side surface of the central magnetic plate 52331 facing the dome 5222, and the second recess 52331a is directly opposite the first recess 52222a. When the voice coil 5223 drives the diaphragm assembly to vibrate, as the dome 5222 moves toward the central magnetic plate 52331, compared to the central magnetic plate 52331 without the second recess 52331a, the first recess 52222a can be embedded in the second recess 52331a, ensuring that the dome 5222 can fit against the central magnetic plate 52331, avoiding gaps between the dome 5222 and the central magnetic plate 52331, thus avoiding limiting the vibration space of the dome 5222, ensuring that the dome 5222 has a larger vibration amplitude, thereby improving the audio effect of the speaker module 50.

[0096] In the embodiments of this application, the core within the speaker module can be a single voice coil core (as shown in Figures 8 and 9) or a dual voice coil core (compared to a single voice coil core). For a dual voice coil core, in some embodiments, the two voice coils jointly drive the vibration of the same diaphragm assembly. In other embodiments, each voice coil independently drives the vibration of a diaphragm assembly (as shown in Figure 17).

[0097] As mentioned earlier, the core divides the housing into a front cavity and a rear cavity. The front cavity can be further divided into a closed front cavity and an open front cavity. The closed front cavity is a relatively enclosed space located in front of the speaker diaphragm, formed by the core and housing of the speaker module. Referring to Figure 10, by creating a hole in the first cover plate of the speaker module's front housing and simultaneously creating a groove in the corresponding position on the first middle plate 111, the core 52 is connected to the inner screen 21. In this case, the core 52, housing, first middle plate 111, and inner screen 21 form an open front cavity C1, increasing the height of the speaker module's front cavity and improving the audio experience.

[0098] Although the electronic device adopts an open front cavity structure, increasing the height of the front cavity, this open front cavity also brings new acoustic problems. For example, when a user plays audio using the electronic device, pressing the inner screen 21 corresponding to the speaker module location will cause noise in the played audio, and the user will feel a tingling sensation when touching the inner screen 21 corresponding to the speaker module location. Research has found that the root cause of the above problems is that the first middle plate 111 at the front shell opening (i.e., the opening on the first cover plate of the front shell) has been removed. At the front shell opening, the inner screen 21 lacks the support of the first middle plate 111. Since the inner screen 21 is a flexible display screen, it is relatively thin and soft. When the user presses the inner screen 21 at the front shell opening, the inner screen 21 will dent. During the denting process, the air pressure in the front cavity will change, thereby generating a force acting on the diaphragm of the speaker module, causing the diaphragm to vibrate polarized or irregularly, thus causing noise problems. In addition, when playing audio, the sound pressure and airflow in the front cavity will directly act on the inner screen 21, thereby causing the inner screen 21 to vibrate and causing the front cavity to resonate.

[0099] To address the issues of abnormal noise and resonance in the open front cavity structure, referring to Figures 11 and 12, this application provides a support scheme that can be applied to the aforementioned electronic device. The support scheme is described below with reference to the accompanying drawings.

[0100] For example, Figure 11 is another cross-sectional view of the electronic device shown in Figure 1 at BB; Figure 12 is another cross-sectional view of the electronic device shown in Figure 1 at CC. Referring to Figures 11 and 12, the electronic device provided in this application embodiment further includes: a support member 60, which is located between the speaker module 50 and the inner screen 21 in the Z-axis direction and covers a portion of the opening in the first middle plate 111 (i.e., the through hole formed by slotting in the first middle plate 111 when forming the open front cavity).

[0101] In this embodiment, the support member 60 can be a rigid body. When the inner screen 21 is pressed and indented, the support member 60 can fit against the inner screen 21, thereby preventing the inner screen 21 in the front cavity from being pressed and indented. This avoids the problem of irregular vibration of the speaker module diaphragm caused by air pressure changes in the front cavity due to the pressing and indentation, thus solving the noise problem, i.e., solving the problem of abnormal noise when pressed. At the same time, along the Z-axis direction, the support member 60 overlaps with the opening of the first middle plate 111, reducing the suspended area of ​​the inner screen 21 at the opening of the first middle plate 111. This changes the vibration mode of the inner screen 21, increasing the natural vibration frequency of the inner screen 21 and avoiding the normal operating frequency range of the speaker module 50, thereby solving the problem of front cavity resonance.

[0102] Considering that even with a large distance between the support member 60 and the inner screen 21, slight indentation may still occur on the inner screen 21 when pressed, in some embodiments, the support member 60 is fixed to the first intermediate plate 111. Since the position of the first intermediate plate 111 is fixed and it is fitted to the inner screen 21, fixing the support member 60 to the first intermediate plate 111 ensures that its position remains constant. This ensures that the support member 60 is fixed in position while allowing it to be closer to the inner screen 21, effectively preventing indentation of the inner screen 21 and resolving the issue of pressing noise. Furthermore, the surface of the support member 60 facing the inner screen 21 is flush with the surface of the first intermediate plate 111 facing the inner screen 21. Thus, the support member 60 is in close contact with the inner screen 21, completely preventing indentation of the inner screen 21 and thoroughly resolving the pressing noise and front cavity resonance problems of the open front cavity structure.

[0103] When the support member 60 is fixed to the first intermediate plate 111, a portion of the first intermediate plate 111 can be reused as the support member 60, that is, the support member 60 is formed directly on the first intermediate plate 111 during the fabrication of the first intermediate plate 111. Alternatively, the support member 60 can be set independently of the first intermediate plate 111, that is, the support member 60 is fabricated using a separate processing technology, and then the fabricated support member 60 is fixed to the first intermediate plate 111.

[0104] Specifically, in one example, the support member 60 is integrally formed with the first middle plate 111. For instance, CNC machine tool processing can be used to integrally form the support member 60 and the first middle plate 111. In this case, reusing a portion of the first middle plate 111 as the support member 60 avoids completely removing the middle frame at the opening of the first middle plate 111, thereby saving process materials and reducing material costs. Furthermore, with CNC machine tool processing, along the Z-axis direction, the thickness of the support member 60 can be less than the thickness of the first middle plate 111 (middle plate), thereby increasing the front cavity height and improving sound output performance.

[0105] In another example, the support element is separate from the mid-frame. In this case, the support element needs to be manufactured separately; it is a molded part that can be rolled into a very thin sheet. The thickness of the support element can be less than 0.3 mm, for example, 0.15 mm or 0.2 mm. This separate manufacturing of the support element allows for a thinner component, thereby increasing the overall height of the front cavity and improving audio performance.

[0106] For example, the support component can be an aluminum alloy sheet, an aluminum-magnesium alloy sheet, or a titanium alloy sheet. This reduces the thickness of the support component while increasing its rigidity, preventing deformation when the inner screen is pressed, thus avoiding abnormal noises caused by support component deformation. Alternatively, the support component can also be a steel sheet.

[0107] In addition, to protect the battery in electronic devices, a thin sheet (such as an aluminum alloy sheet, an aluminum-magnesium alloy sheet, or a titanium alloy sheet) is usually placed on the side of the battery facing the inner screen, i.e., the battery cover plate mentioned above. Since the aluminum alloy sheet, aluminum-magnesium alloy sheet, or titanium alloy sheet can also serve as a support to support the inner screen, as shown in FIG13, the battery cover plate 41 can be extended to the opening of the first middle plate 111, forming an extension 411 of the battery cover plate 41 at the opening of the first middle plate 111. This extension 411 is used to prevent the inner screen from being pressed and dented. In this way, by extending the battery cover plate 41 and using the extension 4111 of the battery cover plate 41 as a support, the battery cover plate 41 can protect the battery 40 while solving the pressing noise and front cavity resonance problems of the open front cavity structure. Moreover, the battery cover plate 41 and the support can be manufactured in the same process, thereby saving process steps and reducing process costs. Alternatively, the battery cover plate can also be made of steel sheet.

[0108] When the speaker module is working, the airflow carrying sound waves passes through the front cavity and the sound outlet channel, and then exits through the sound outlet hole. However, if a support member 60 is placed in the front cavity, it will obstruct the flow of this airflow, thus reducing audio quality. Therefore, the support member 60 is designed as an elongated strip, extending along the direction from the front cavity towards the sound outlet hole. In this way, most of the airflow can pass through the sound outlet channel and exit through the sound outlet hole. At this time, the airflow carrying sound waves is not significantly obstructed by the support member 60, allowing the electronic device to play audio normally, thereby ensuring audio quality. In this embodiment, the sound outlet hole is located on the side frame positioned in the X-axis direction; therefore, the extension direction of the support member 60 is in the X-axis direction. Alternatively, the sound outlet hole can also be located on the side frame positioned in the Y-axis direction, in which case the extension direction of the support member 60 is in the Y-axis direction. Optionally, there is only one support member 60. This is because more support members 60 would occupy more of the area directly opposite the core and inner screen, reducing the height of most of the front cavity and leading to the audio performance degradation problem associated with a closed front cavity. Therefore, in order to solve the problems of abnormal pressing noise and front cavity resonance in the open front cavity structure while ensuring audio performance, the number of support components 60 is set to 1.

[0109] It should be noted that when there is only one support member 60, the support member 60 can be positioned at any location corresponding to the opening in the first middle plate. Optionally, when there is only one support member 60, it is positioned at the center of the opening in the first middle plate. In this way, corresponding to the position of the opening in the first middle plate, the suspended area of ​​the inner screen on both sides of the support member 60 is the same. When the support member 60 supports the inner screen, it can effectively reduce the deformation of the inner screen at the corresponding suspended position, thereby effectively preventing the inner screen from being pressed and dented.

[0110] As analyzed above, considering that the support structure affects the front cavity height and reduces audio performance, this embodiment of the application makes a protrusion in the core to improve audio performance. Specifically, along the Z-axis, in the area where the first middle plate and the support structure do not overlap, the dome of the core protrudes towards the inner screen. Simultaneously, at the protruding dome position, the magnetic circuit system can be adaptively thickened (the increased thickness is determined to not hinder the vibration of the diaphragm assembly, and is set according to actual needs). Furthermore, at the position corresponding to the support structure, the dome protrudes away from the inner screen to avoid the support structure 60. Thus, by increasing the thickness of the magnetic circuit system, the corresponding electrical transduction coefficient BL is larger. With the current intensity I in the voice coil wire remaining constant, the driving force BIL of the speaker module is larger, i.e., the Ampere force F is larger, thereby improving the low-frequency performance of the speaker module. Alternatively, with the driving force BIL of the speaker module remaining constant, the current intensity I in the voice coil wire can be reduced, thereby reducing power consumption. For example, Figure 14 is a perspective view of a kernel provided in an embodiment of this application; Figure 15 is a cross-sectional view of a kernel provided in an embodiment of this application; and Figure 16 is a cross-sectional view of another kernel provided in an embodiment of this application. Referring to Figures 14, 15, and 16, the dome includes a main body 52222 and a recess 52223. At least a portion of the main body 52222 protrudes towards the inner screen and is located in the area where the opening of the first middle plate does not overlap with the support member. The recess 52223 protrudes towards the magnetic circuit system 523 and penetrates the dome along the extending direction of the support member, covering the support member. The thickness of the magnetic circuit system 523 corresponding to the aforementioned at least a portion of the main body 52222 is greater than the thickness of the magnetic circuit system 523 corresponding to the location of the recess 52223.

[0111] As is well known, a higher and more stable BL curve indicates a more uniform force on the coil, resulting in better speaker module performance. In this application, the thickness of the magnetic circuit system can be increased by increasing the thickness of the magnet, thereby raising the BL curve. Alternatively, the thickness of the magnetic circuit system can be increased by increasing the thickness of the magnetic guide plate, thus making the BL curve more stable.

[0112] In one example, referring to Figure 15, the thickness of the magnet 5231 at the position corresponding to the main body 52222 is greater than the thickness of the magnet at the position corresponding to the groove 52223. Thus, by increasing the thickness of the magnet 5231, the BL curve can be made higher, meaning the value on the BL curve is larger.

[0113] In another example, referring to Figure 16, the thickness of the magnetic plate 5232 at the position corresponding to the main body 52222 is greater than the thickness of the magnetic plate 5232 at the position corresponding to the groove 52223. In this way, by increasing the thickness of the magnetic plate 4132, the BL curve can be made smoother, that is, the BL curve is closer to a straight line, and the value on the BL curve is closer to the peak value.

[0114] Alternatively, the thickness of the magnet and the magnetic plate at positions 52222 of the main body can be increased simultaneously. Specifically, the thickness of the magnet at at least a portion of the main body is greater than the thickness of the magnet at the sink position, and the thickness of the magnetic plate at at least a portion of the main body is greater than the thickness of the magnetic plate at the sink position. This allows for a balance between the height and stability of the BL curve.

[0115] It should be noted that the embodiments of this application do not limit the structure of the core shown in Figure 14. The core can be a single voice coil core or a double voice coil core. Furthermore, there are no restrictions on the number and distribution of magnets or coils. The core only needs to have the structure shown in Figure 14, and the thickness of the magnetic guiding system at the corresponding position of the main body can be increased.

[0116] By setting up the aforementioned support component, it was found that a portion of the core adapted to the support component could be used. By fixing the fixed protrusion on the dome side of the core to the support component, the support component and the core could form a larger rigid body, which could better prevent the inner screen from being pressed and thus solve the pressing noise and front cavity resonance problems of the open front cavity structure.

[0117] In one example, Figure 17 is a perspective view of another kernel provided in an embodiment of this application; Figure 18 is a cross-sectional view of the kernel in Figure 17 at the CC position of the electronic device shown in Figure 1. Referring to Figures 17 and 18, the kernel includes a first sound-emitting unit 5101 and a second sound-emitting unit 5102. A frame 521 supports and fixes the first sound-emitting unit 5101 and the second sound-emitting unit 5102, and separates the first sound-emitting unit 5101 and the second sound-emitting unit 5102. The portion of the frame 521 located between the first sound-emitting unit 5101 and the second sound-emitting unit 5102 is a protrusion 5100. When this kernel is applied to an electronic device, the front cavity of the first sound-emitting unit 5101 and the front cavity of the second sound-emitting unit 5102 are independent of each other. One sound-emitting unit emits sound through a sound outlet hole, and the other sound-emitting unit emits sound through a sound outlet gap (the gap formed between the outer screen and the first frame). The protrusion 5100 fits against the support 60 along its extending direction. At this time, both the first sound-emitting unit 5101 and the second sound-emitting unit 5102 are located in the area where the opening of the first middle plate does not overlap with the support 60. Therefore, similar to the above embodiment, in this non-overlapping area, the domes of the first sound-emitting unit 5101 and / or the second sound-emitting unit 5102 can be protruded, and the thickness of the magnetic circuit system can be increased accordingly to improve audio performance. Furthermore, there can be two supports 60. The domes of both the first sound-emitting unit 5101 and the second sound-emitting unit 5102 are modified according to the dome of the core shown in Figure 14. Referring to Figure 14, in this embodiment, one support can be located in the recessed position of the first sound-emitting unit 5101, and the other support can be located in the recessed position of the second sound-emitting unit 5102.

[0118] In another example, Figure 19 is a perspective view of another kernel provided in an embodiment of this application; Figure 20 is a cross-sectional view of the kernel in Figure 19; Figure 21 is a cross-sectional view of the kernel in Figure 19 at BB of the electronic device shown in Figure 1; Figure 22 is a cross-sectional view of the kernel in Figure 19 at CC of the electronic device shown in Figure 1. Combining Figures 19-22, the main difference between the kernel provided in this embodiment and the kernel shown in Figure 7 is that in this embodiment, the dome 5222 is annular, and the area surrounded by the dome 5222 is provided with a fixedly positioned protrusion 5100, meaning that the protrusion 5100 will not vibrate with the vibration of the dome 5222. Therefore, the protrusion 5100 can be fixedly connected to the support member 60, thereby forming a larger rigid body and improving the support effect of the support member 60. In addition, since the dome 5222 is annular, when the protrusion 5100 in the middle of the core is fixed to the support 60, the dome 5222 will inevitably have a part that overlaps with the support 60. Therefore, the dome 5222 can be recessed in the overlapping part, that is, protruded into the magnetic circuit system. At the same time, the other parts of the dome 5222 are all protruded, that is, protruded into the inner screen, and the thickness of the corresponding magnetic circuit system is increased, thereby improving the audio performance.

[0119] It should be noted that the fixed connection between the protrusion 5100 and the support member 60 can be that the protrusion 5100 directly abuts against the support member 60, or the protrusion 5100 can be connected to the support member 60 through a filler (such as foam, plastic film, rubber, etc.).

[0120] In addition, considering that the position of the aforementioned protruding part fixing component will not change (relative to the first middle plate), the aforementioned protruding part of the core can be directly used as a support component. This can solve the problems of pressing noise and front cavity resonance in the open front cavity structure, while saving the hardware cost of the support component.

[0121] For example, the kernel shown in Figures 17 and 19 can be directly attached to the inner screen via the protrusion 5100. For instance, the protrusion 5100 can be fixed to the inner screen with adhesive, thereby eliminating the need for a support component. This solves the problems of abnormal pressing noise and front cavity resonance in the open front cavity structure while saving on the hardware cost of the support component.

[0122] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An electronic device, comprising: The electronic device comprises a first structural member, a middle frame, a second structural member, a sound production device and a support member. The middle frame comprises a ring-shaped frame and a middle plate located in the frame. In a first direction, the first structural member and the second structural member are respectively located on two sides of the middle plate, the frame, the first structural member and the second structural member surround to form a cavity, the sound production device is located in the cavity and on a side of the middle plate away from the first structural member. The middle plate is provided with an opening hole corresponding to the position of the sound production device, the sound production device and the first structural member are connected through the opening hole to form a front cavity of the sound production device. The support member is located between the sound production device and the first structural member and covers part of the opening hole. The support member is fixed on the middle plate.

2. The electronic device of claim 1, wherein, The support member is integrally formed with the middle plate.

3. The electronic device of claim 2, wherein, The support member is independently provided from the middle plate.

4. The electronic device of claim 2, wherein, The support member is an aluminum alloy sheet, an aluminum-magnesium alloy sheet or a titanium alloy sheet.

5. The electronic device of claim 4, wherein, The electronic device further comprises a battery and a battery cover plate, and in the first direction, the battery cover plate is located between the battery and the first structural member.

6. The electronic device of claim 1, wherein, The battery cover plate comprises an extension part extending to the opening hole, and the extension part is the support member. The support member is in a strip shape, the frame is provided with a sound outlet hole, and the extension direction of the support member is a direction from the front cavity to the sound outlet hole.

7. The electronic device of claim 1, wherein, The number of the support member is one.

8. The electronic device of claim 1, wherein, The sound production device comprises a core, the core comprises a diaphragm group and a magnetic circuit system, the magnetic circuit system is located on a side of the diaphragm group away from the first structural member, the diaphragm group comprises a diaphragm and a dome, and the diaphragm is arranged around the dome.

9. The electronic device of claim 1, wherein, The dome comprises a main body part and a sink, at least part of the main body part protrudes towards the first structural member and is located in a region where the opening hole and the support member do not overlap, and the sink protrudes towards the magnetic circuit system, the sink penetrates through the dome in the extension direction of the support member and covers the support member. The thickness of the magnetic circuit system corresponding to the position of the at least part of the main body part is greater than the thickness of the magnetic circuit system corresponding to the position of the sink. The magnetic circuit system comprises a magnet and a magnetic conductive plate stacked in the first direction.

10. The electronic device of claim 9, wherein, The thickness of the magnet corresponding to the position of the at least part of the main body part is greater than the thickness of the magnet corresponding to the position of the sink; or The thickness of the magnetic conductive plate corresponding to the position of the at least part of the main body part is greater than the thickness of the magnetic conductive plate corresponding to the position of the sink; or The thickness of the magnet corresponding to the position of the at least part of the main body part is greater than the thickness of the magnet corresponding to the position of the sink, and the thickness of the magnetic conductive plate corresponding to the position of the at least part of the main body part is greater than the thickness of the magnetic conductive plate corresponding to the position of the sink. The core further comprises a protruding part, the protruding part is located on a side of the magnetic circuit system facing the first structural member, the protruding part protrudes towards the first structural member relative to the diaphragm group and is position-fixed; 11. The electronic device of claim 9, wherein, The protruding part is fixedly connected with the support member. ​ 12. The electronic device of claim 9, wherein, The inner core further comprises a protruding portion located on a side of the magnetic circuit system facing the first structural member, the protruding portion protruding towards the first structural member and being fixed in position relative to the diaphragm group; The protruding portion is fixedly connected with the first structural member, and the protruding portion is the support member.

13. The electronic device of claim 11 or 12, wherein, The inner core comprises a first sound production unit and a second sound production unit, the first sound production unit comprising a first diaphragm group, a first voice coil and a first magnetic circuit system, and the second sound production unit comprising a second diaphragm group, a second voice coil and a second magnetic circuit system; The inner core further comprises a yoke, the first sound production unit and the second sound production unit being fixed on the yoke, the yoke comprising a peripheral portion and an intermediate portion located in the peripheral portion and connected with the peripheral portion, the intermediate portion separating the first sound production unit and the second sound production unit; The intermediate portion is the protruding portion.

14. The electronic device of claim 11 or 12, wherein, The dome is annular, and the dome is arranged around the outer periphery of the protruding portion.

15. The electronic device of claim 1, wherein, The first structural member is a first display screen, and the second structural member is a back cover.

16. The electronic device of claim 1, wherein, The first structural member is a first display screen, and the second structural member is a second display screen.

17. The electronic device of claim 16, wherein, The electronic device is a foldable electronic device, the first display screen is an inner screen, and the second display screen is an outer screen.

Images