Speaker cores, speaker modules and electronic devices

Abstract

The embodiments of the present application provide a speaker core, a speaker module and an electronic device, which can prevent the core material of the acoustic reinforcement material from entering the core of the speaker module and are conducive to the lightweight design of the electronic device. The electronic device includes a speaker module, and the speaker module includes a speaker core. The speaker core divides the accommodating cavity of the speaker module into a front cavity and a rear cavity; the speaker core includes: a bracket; a diaphragm system, including a diaphragm group and a voice coil, the diaphragm group is fixed to one side of the bracket, and the voice coil is fixed to the side of the diaphragm group facing the bracket; a magnetic circuit system, including a magnet and a magnet group, the magnet group is located on the side of the bracket away from the diaphragm group, and the magnet is located on the side of the magnet group away from the bracket, which is used to drive the voice coil to move so that the diaphragm group makes a sound; a ventilation gap is provided between the magnet and the bracket to achieve ventilation of the diaphragm group and the rear cavity; a partition structure is used to block the ventilation gap, and a plurality of ventilation holes are opened on the partition structure, and the ventilation holes are connected to the rear cavity.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to a speaker core, a speaker module and an electronic device. Background Art

[0002] Speaker modules are used to restore audio electrical signals such as music and voice into sound. They can support the function of external audio, so they are widely used in electronic devices such as mobile phones, tablets, and laptops. With the development of electronic devices such as mobile phones and tablets, people have higher demands for the audio experience of speaker modules. Higher low-frequency loudness will bring better audio experience. The key factor affecting the low-frequency loudness of the speaker module is the volume of the back cavity. The larger the volume of the back cavity, the higher the low-frequency loudness.

[0003] However, with the trend of electronic devices becoming thinner and smaller, the volume of the back cavity is limited. In order to obtain a better audio experience, acoustic enhancement materials (such as bass acoustic enhancement materials) are generally filled into the speaker module to enhance the virtual space of the back cavity.

[0004] However, the core material of the acoustic enhancement material will enter the inner core of the speaker module, affecting the vibration of the diaphragm and further affecting the normal operation of the speaker module. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides a speaker core, a speaker module and an electronic device, which can prevent the acoustic enhancement material core material from entering the core of the speaker module, and can increase the ventilation volume between the core and the back cavity, which is conducive to reducing the thickness of the core, and further conducive to the lightweight design of the electronic device.

[0006] In a first aspect, an embodiment of the present application provides an electronic device, which includes a speaker module, and the speaker module has a containing cavity, the speaker core divides the containing cavity into a front cavity and a rear cavity; the speaker core includes: a bracket; a diaphragm system, including a diaphragm group and a voice coil, the diaphragm group is fixed to one side of the bracket, and the voice coil is fixed to the side of the diaphragm group facing the bracket; a magnetic circuit system, including a magnet and a magnet group, the magnet group is located on the side of the bracket away from the diaphragm group, the magnet is located on the side of the magnet group away from the bracket, and the magnetic circuit system is used to drive the voice coil to move so that the diaphragm group makes a sound; there is a ventilation gap between the magnet and the bracket to achieve ventilation between the diaphragm group and the rear cavity; a partition structure is used to block the ventilation gap between the magnet and the bracket, and a plurality of ventilation holes are opened on the partition structure, and the ventilation holes are connected to the rear cavity, that is, although the partition structure blocks the ventilation gap, the ventilation holes on the partition structure can achieve ventilation with the rear cavity.

[0007] By setting a partition structure between the speaker core and the back cavity and opening ventilation holes on the partition structure, the powdered acoustic enhancement material in the back cavity can be prevented from entering the core cavity of the speaker core. At the same time, the ventilation volume between the core and the back cavity can be guaranteed, the reliability of the speaker module can be guaranteed, the audio of the electronic device can be better, and the user experience can be enhanced.

[0008] Exemplarily, the partition structure may be located in the ventilation gap between the magnetic steel and the bracket; the partition structure may also cover the ventilation gap between the magnetic steel and the bracket.

[0009] Exemplarily, the speaker module can be an open speaker module. When the speaker module is an open speaker module, the whole machine cavity is reused as the containing cavity of the speaker module; the speaker module can be a sealed speaker module. When the speaker module is a sealed speaker module, the speaker module includes an outer shell, and the outer shell has a containing cavity.

[0010] In some possible implementations, the bracket includes an appearance portion, and along a first direction, the appearance portion includes a first surface and a second surface relative to each other, and the first surface is located on the side of the second surface that is away from the diaphragm system; the magnetic steel and the first surface have a preset distance to form a ventilation gap between the magnetic steel and the first surface; the partition structure includes a ventilation component, the ventilation component is perpendicular to the first surface, the ventilation component is arranged around at least a portion of the periphery of the magnetic steel, and blocks the ventilation gap; wherein the first direction is a direction perpendicular to the plane where the magnetic steel is located.

[0011] Since the partition structure does not include a shielding member, that is, no shielding member is provided on the magnetic steel in the Z-axis direction, that is, the partition structure only includes a ventilation member, in this way, a layer of wall thickness can be saved, and the thickness of the core in the Z-axis direction can be further reduced, which is conducive to the miniaturization design of electronic equipment, and since there is no need to set a step, the integrity of the magnetic steel can be better guaranteed, and the magnetic field strength in the magnetic gap can be further increased, and the driving strength of the diaphragm group can be improved. In addition, the ventilation member is arranged around at least part of the periphery of the magnetic steel and is perpendicular to the first surface, so that the structure of the ventilation member is simple and the area is small, which is conducive to the preparation of the ventilation member.

[0012] In some possible implementations, the partition structure includes at least two partition units; the ventilation component includes at least two ventilation parts; each partition unit includes a ventilation part, the ventilation part includes a first part, a second part located on both sides of the first part and a middle part connecting the first part and the second part; the first part and the second part are provided with ventilation holes; a protrusion is provided on the side of the appearance part away from the diaphragm group, and the middle part is fixed on the protrusion, so that the partition unit is fixed on the bracket.

[0013] When the partition structure includes at least two partition units, the partition unit can be flexibly arranged according to the position of the ventilation gap between the magnetic steel and the bracket, thereby reducing the difficulty of manufacturing the partition structure. In addition, the gap between the partition unit and the partition unit can leave a certain space for the magnetic steel, so that the integrity of the magnetic steel is better. In addition, since the partition unit does not include a shielding portion, that is, in the Z-axis direction, no shielding portion is arranged on the magnetic steel, that is, the partition unit only includes a ventilation portion, in this way, a layer of wall thickness and the gap between the shielding portion and the magnetic steel can be saved, further reducing the thickness of the core in the Z-axis direction, which is conducive to the miniaturization design of the electronic device, and since the magnetic steel does not need to be provided with a step to carry the shielding portion, the integrity of the magnetic steel can be ensured to be better, further increasing the magnetic field strength in the magnetic gap, and improving the driving strength of the diaphragm group. In addition, by fixing the middle part of the ventilation portion to the protrusion to achieve a fixed connection between the partition unit and the bracket, the structure of the partition unit is simple, and the fixing method with the bracket is simple.

[0014] Exemplarily, the number of the partition units is two, and the two partition units are symmetrically arranged.

[0015] In some possible implementations, based on the fact that a protrusion is provided on the side of the appearance part away from the diaphragm group, the appearance part also includes an outer wall and an inner wall connecting the first surface and the second surface; the protrusion is provided on the first surface; the part of the protrusion facing the inner wall is recessed along the first direction to form a platform; along the first direction, the middle part includes a fixed sub-part and a supporting sub-part located on the side of the fixed sub-part away from the diaphragm group, the fixed sub-part is fixed to the platform to achieve a fixed connection between the ventilation part and the bracket, and the magnet is fixed to the supporting sub-part to achieve a fixed connection between the magnet and the partition structure, that is, the fixed connection of the magnet is simultaneously achieved at the connection position between the partition structure and the bracket, and there is no need to separately set up a structure for fixing the magnet, the structure is simple, and there is no need to reserve a corresponding area for the structure for fixing the magnet, thereby reducing the volume of the inner core.

[0016] In some possible implementations, based on the above-mentioned ventilation portion including a first part, a second part and a middle part, along a first direction, the ventilation portion includes a relative upper surface and a lower surface, the upper surface is located on the side of the lower surface away from the diaphragm group, and the ventilation portion also includes an inner surface and an outer surface connecting the upper surface and the lower surface; the side wall of the magnetic steel is in contact with the inner surface of the ventilation portion, rather than being arranged on the upper surface.

[0017] This arrangement can save the thickness of the magnetic steel and reduce the thickness of the core. When the core is applied to a speaker module, it is conducive to the lightweight design of the speaker module, and further to the lightweight design of electronic equipment.

[0018] Exemplarily, the first direction is the Z-axis direction in the embodiment.

[0019] In some possible implementations, based on the contact between the side wall of the magnetic steel and the inner surface of the ventilation part, along the first direction, the surface of the magnetic steel facing away from the magnet group is flush with the upper surface of the ventilation part, thereby further reducing the thickness of the core and facilitating the lightweight design of the electronic device.

[0020] In some possible implementations, the partition unit includes a ventilation part, and the ventilation part includes a relative upper surface and a lower surface, and the upper surface is located on the side of the lower surface away from the diaphragm group; the partition unit also includes a flange, and the flange is a structure formed by bending the end of the ventilation part away from the diaphragm group at a preset angle, and the magnet is fixed on the flange.

[0021] This arrangement ensures a large ventilation volume while increasing the contact area between the magnet and the ventilation part, thereby ensuring the firmness of the fixed connection between the magnet and the ventilation part.

[0022] Exemplarily, the preset angle is, for example, 90°, 60°, 120°, etc.

[0023] In some possible implementations, the appearance portion includes two first appearance sub-portions and two second appearance sub-portions, and a first appearance sub-portion, a second appearance sub-portion, another first appearance sub-portion and another second appearance sub-portion are connected end to end in sequence; a protrusion is provided at the connection between the first appearance sub-portion and the second appearance sub-portion; the magnet group includes a central magnet and at least two edge magnets, the edge magnets are arranged circumferentially around the central magnet, a magnetic gap is defined between the central magnet and the edge magnets, and one end of the voice coil extends into the magnetic gap; the ventilation gap includes a first ventilation gap formed between the first surface of the first appearance sub-portion, the magnetic steel and the protrusion, and a second ventilation gap formed between the first surface, the magnetic steel, the edge magnet and the protrusion; the first part of the partition unit blocks the first ventilation gap, and the second part of the partition unit blocks the second ventilation gap.

[0024] That is to say, the first part and the second part of the partition unit respectively block the ventilation gaps at different positions, so that the ventilation gaps can be better blocked and the arrangement of the partition unit is facilitated.

[0025] In some possible implementations, the diaphragm system also includes a signal receiving structure, which is fixed to a side of the bracket facing away from the diaphragm group; the signal receiving structure includes a first fixed portion and a movable portion that are spaced apart, and also includes a connecting portion connecting the first fixed portion and the movable portion, and the connecting portion is located in the gap between the first fixed portion and the movable portion; the portion of the first portion that does not overlap with the orthographic projection of the connecting portion on the reference plane in the orthographic projection on the reference plane extends to the gap between the first fixed portion and the movable portion; the reference plane is parallel to the plane where the magnetic steel is located.

[0026] When the portion of the first portion that does not overlap with the orthographic projection of the connecting portion on the reference plane in the orthographic projection on the reference plane extends to the gap between the first fixed portion and the movable portion, the size of the first portion in the first direction (the Z-axis direction in the embodiment) increases, thereby increasing the area of ​​the first portion, and further increasing the total area of ​​the ventilation holes opened on the first portion, thereby increasing the ventilation volume, that is, making full use of the gap between the first fixed portion and the movable portion of the signal receiving unit, thereby avoiding waste of the gap.

[0027] In some possible implementations, on the basis that the portion of the first part that does not overlap with the orthographic projection of the connecting part on the reference plane in the orthographic projection on the reference plane extends to the gap between the first fixed part and the movable part, the extension direction of the ventilation holes on the portion of the first part that does not overlap with the orthographic projection of the connecting part on the reference plane in the orthographic projection on the reference plane is different from the extension direction of the ventilation holes on the portion of the first part that overlaps with the orthographic projection of the connecting part on the reference plane in the orthographic projection on the reference plane. This arrangement facilitates the processing of the ventilation part and makes the stress distribution of the ventilation part more uniform.

[0028] In some possible implementations, the speaker module further includes a housing, the housing includes a front housing and a rear housing, a housing cavity is enclosed between the front housing and the rear housing, the speaker core is disposed in the housing cavity to separate the housing cavity into a front cavity and a rear cavity; an annular step is left at the edge of the surface of the magnet away from the magnet group, and the rear housing is disposed on the annular step. In this way, in the process of forming the speaker module, the rear shell in the housing of the speaker module can be overlapped on the annular step to minimize the thickness of the speaker module, thereby facilitating the thin and light design of the electronic device.

[0029] In some possible implementations, the bracket includes an annular appearance portion and a supporting portion located within the annular appearance portion; the diaphragm system also includes a signal receiving structure fixed to the side of the bracket facing away from the diaphragm group; the signal receiving structure includes a first fixed portion and a movable portion arranged at intervals; the movable portion is located on the side of the voice coil facing away from the diaphragm group, so that the signal receiving structure and the voice coil are electrically connected; a groove is provided on the surface of the magnetic steel facing the magnet group, and the orthographic projection of the groove on the reference plane overlaps with the orthographic projection of the movable portion on the reference plane; the reference plane is parallel to the plane where the magnetic steel is located to avoid the vibration of the movable portion and leave space for the vibration of the movable portion, and since the thickness of the magnetic steel in the embodiment of the present application is relatively thick, only the groove is provided to meet the vibration requirement of the movable portion, and there is no need to provide a hollow portion, which can ensure the integrity of the magnetic steel, increase the magnetic field strength in the magnetic gap, and improve the driving strength of the diaphragm system.

[0030] In some possible implementations, grooves are provided on the surface of the magnetic steel facing the magnet group. When there are multiple grooves, the multiple grooves are interconnected to simplify the process steps.

[0031] Exemplarily, the shape formed by the orthographic projection of the plurality of mutually connected grooves on the plane formed by the X-axis and the Y-axis is, for example, a “well” shape.

[0032] In some possible implementations, the multiple ventilation holes of the first part are arranged from the first edge to the second edge, and the two ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively; or, the multiple ventilation holes of the first part are arranged from the third edge to the fourth edge, and the two ends of the ventilation holes of the first part extend to the first edge and the second edge respectively; wherein the first edge is an edge of the first part adjacent to one of the second parts, the second edge is an edge of the first part adjacent to another second part, and along the first direction, in the first part, the third edge is located on the side of the fourth edge away from the diaphragm group; the multiple ventilation holes of the second part are arranged from the fifth edge to the sixth edge, and the ventilation holes of the second part The two ends extend to the seventh edge and the eighth edge respectively; or, the multiple ventilation holes of the second part are arranged from the seventh edge to the eighth edge, and the two ends of the ventilation holes of the first part extend to the fifth edge and the sixth edge respectively; wherein the fifth edge is the edge of the second part adjacent to the first part, and the sixth edge is the edge of the second part away from the first part. Along the first direction, in the second part, the seventh edge is located on the side of the eighth edge away from the diaphragm group to ensure that the area of ​​the ventilation holes is larger. In this way, the height of the ventilation part in the Z-axis direction can be smaller, which is beneficial to the lightweight design of the core, and the thickness of the magnetic steel can be increased, thereby increasing the magnetic field strength in the magnetic gap and improving the driving strength of the diaphragm group.

[0033] Exemplarily, the multiple ventilation holes of the first part are arranged from the first edge to the second edge, and the two ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively; the multiple ventilation holes of the second part are arranged from the fifth edge to the sixth edge, and the two ends of the ventilation holes of the second part extend to the seventh edge and the eighth edge respectively.

[0034] Exemplarily, the multiple ventilation holes of the first part are arranged from the first edge to the second edge, and the two ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively; the multiple ventilation holes of the second part are arranged from the seventh edge to the eighth edge, and the two ends of the ventilation holes of the first part extend to the fifth edge and the sixth edge respectively.

[0035] Exemplarily, the multiple ventilation holes of the first part are arranged from the third edge to the fourth edge, and the two ends of the ventilation holes of the first part extend to the first edge and the second edge respectively; the multiple ventilation holes of the second part are arranged from the fifth edge to the sixth edge, and the two ends of the ventilation holes of the second part extend to the seventh edge and the eighth edge respectively.

[0036] Exemplarily, the multiple ventilation holes of the first part are arranged from the third edge to the fourth edge, and the two ends of the ventilation holes of the first part extend to the first edge and the second edge respectively; the multiple ventilation holes of the second part are arranged from the seventh edge to the eighth edge, and the two ends of the ventilation holes of the first part extend to the fifth edge and the sixth edge respectively.

[0037] In some possible implementations, the spacing between two adjacent ventilation holes satisfies: (1 / 4) W2≤W1≤2W2, wherein W1 is the spacing between two adjacent ventilation holes, and W2 is the width of the ventilation holes; when the two ends of the ventilation holes of the first part extend to the first edge and the second edge respectively, the width of the ventilation holes is the size of the ventilation holes along the first direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the first direction; when the two ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively, the width of the ventilation holes is the size of the ventilation holes along the second direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes. The spacing between them is the distance between the two ventilation holes along the second direction, and the second direction is the direction from the first edge to the second edge; when the two ends of the ventilation holes of the second part extend to the fifth edge and the sixth edge respectively, the width of the ventilation holes is the size of the ventilation holes along the first direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the first direction; when the two ends of the ventilation holes of the second part extend to the seventh edge and the eighth edge respectively, the width of the ventilation holes is the size of the ventilation holes along the second direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the second direction, and the second direction is the direction from the fifth edge to the sixth edge.

[0038] This arrangement will neither cause a small ventilation volume due to the large spacing between two adjacent ventilation holes, nor be detrimental to the preparation and strength of the partition structure due to the small spacing between two adjacent ventilation holes.

[0039] Exemplarily, the distance between two adjacent ventilation holes satisfies: W1=(1 / 4)W2, W1=2W2, W1=W2, W1=(1 / 2)W2 or W1=1.5W2, etc.

[0040] In some possible implementations, the length of the ventilation hole of the first part satisfies: (2 / 5) L2≤L1≤(9 / 10) L2, wherein L1 is the length of the ventilation hole of the first part, and L2 is the length of the first part; when the two ends of the ventilation hole of the first part extend to the first edge and the second edge respectively, the length of the ventilation hole is the size of the ventilation hole along the second direction, and the length of the first part is the size of the first part along the second direction, and the second direction is the direction from the first edge to the second edge; when the two ends of the ventilation hole of the first part extend to the third edge and the fourth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the first direction, and the length of the first part is the size of the first part along the first direction. size; and / or, the length of the ventilation hole of the second part satisfies: (2 / 5) L3≤L4≤(9 / 10)L3, wherein L4 is the length of the ventilation hole of the second part, and L3 is the length of the second part; when the two ends of the ventilation hole of the second part extend to the fifth edge and the sixth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the third direction, and the length of the second part is the size of the second part along the third direction, and the third direction is the direction from the fifth edge to the sixth edge; when the two ends of the ventilation hole of the second part extend to the seventh edge and the eighth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the first direction, and the length of the second part is the size of the second part along the first direction.

[0041] This arrangement will neither result in a small ventilation volume due to the short length of the ventilation hole, nor be detrimental to the preparation and strength of the partition structure due to the short length of the ventilation hole.

[0042] Exemplarily, the length of the ventilation holes in the first part satisfies: L1=(2 / 5)L2, L1=(9 / 10)L2, L1=(1 / 2)L2, L1=(3 / 5)L2, L1=(7 / 10)L2 or L1=(4 / 5)L2, etc.

[0043] Exemplarily, the length of the ventilation hole of the second part satisfies: L4=(2 / 5)L3, L4=(9 / 10)L3, L4=(1 / 2)L3, L4=(3 / 5)L3, L4=(7 / 10)L3 or L4=(4 / 5)L3, etc.

[0044] In some possible implementations, the cross-sectional shape of the ventilation holes includes rectangular, elliptical, "S"-shaped and other long strips, and may also include square or circular, etc. The embodiments of the present application do not limit the cross-sectional shape of the ventilation holes, and those skilled in the art may set it according to actual conditions.

[0045] The long strip-shaped ventilation holes increase the opening rate, further ensuring a large ventilation volume in the speaker core and rear cavity. In this way, the height of the ventilation part in the Z-axis direction can be smaller, which is conducive to the lightweight design of the core, and can increase the thickness of the magnetic steel, thereby increasing the magnetic field strength in the magnetic gap and improving the driving strength of the diaphragm group.

[0046] Exemplarily, the opening ratio is the ratio of the total area of ​​the ventilation holes to the area of ​​the partition structure.

[0047] Exemplarily, the so-called cross-sectional shape is, for example, the shape of the orthographic projection of the ventilation holes on the first part of the ventilation section on the plane formed by the Y-axis and the Z-axis, and the shape of the orthographic projection of the ventilation holes on the second part of the ventilation section on the plane formed by the X-axis and the Z-axis.

[0048] Exemplarily, the cross-sectional shapes of the ventilation holes on the first part may be the same, partially the same, or completely different; the cross-sectional shapes of the ventilation holes on the second part may be the same, partially the same, or completely different.

[0049] In some possible implementations, the electronic device further includes a middle frame, on which a sound outlet is provided; the speaker module has a sound outlet channel, which connects the front cavity and the sound outlet. The sound converted by the speaker module is output through the sound outlet channel and further output through the sound outlet to the outside of the electronic device to be heard by the user.

[0050] In a second aspect, an embodiment of the present application provides a speaker core, which includes: a bracket; a diaphragm system, including a diaphragm group and a voice coil, the diaphragm group is fixed to one side of the bracket, and the voice coil is fixed to the side of the diaphragm group facing the bracket; a magnetic circuit system, including a magnet and a magnet group, the magnet group is located on the side of the bracket away from the diaphragm group, the magnet is located on the side of the magnet group away from the bracket, and the magnetic circuit system is used to drive the voice coil to move so that the diaphragm group makes a sound; there is a ventilation gap between the magnet and the bracket; a partition structure, used to block the ventilation gap between the magnet and the bracket, and a plurality of ventilation holes are opened on the partition structure.

[0051] By opening ventilation holes on the partition structure, the powdered acoustic enhancement material in the back cavity is prevented from entering the inner core cavity of the speaker core, while the ventilation volume between the inner core and the back cavity can be guaranteed, ensuring the reliability of the speaker module, making the audio of the electronic device better and enhancing the user experience.

[0052] In the third aspect, an embodiment of the present application provides a speaker module, which includes a shell and a core, and the core is the speaker core described in the first aspect; the speaker core is located in the shell, and divides the accommodating cavity in the shell into a front cavity and a rear cavity, and the ventilation hole is connected to the rear cavity to realize ventilation of the diaphragm group and the rear cavity.

[0053] The third aspect and any implementation of the third aspect correspond to the second aspect and any implementation of the second aspect, respectively. The technical effects corresponding to the third aspect and any implementation of the third aspect can refer to the technical effects corresponding to the above-mentioned second aspect and any implementation of the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application;

[0055] Figure 2 for Figure 1 an exploded view of the electronic device shown;

[0056] Figure 3 A schematic diagram of the structure of a speaker module provided in an embodiment of the present application;

[0057] Figure 4 for Figure 3 A cross-sectional view of the loudspeaker module along the AA' direction;

[0058] Figure 5 A schematic diagram of the structure of a kernel provided in an embodiment of the present application;

[0059] Figure 6 for Figure 5 Exploded view of the kernel shown;

[0060] Figure 7 for Figure 5 The cross-section of the inner core along the BB' direction is shown;

[0061] Figure 8 for Figure 5 A schematic diagram of the structure of the appearance part of the kernel shown;

[0062] Fig. 9 for Figure 5 A schematic diagram of the structure of the diaphragm group in the core shown;

[0063] Fig.10 for Figure 5 A schematic diagram of the structure of the signal receiving structure in the kernel shown;

[0064] Fig.11 for Figure 5 A schematic diagram of the structure of the magnet group in the core shown;

[0065] Fig.12 for Figure 5 A schematic diagram of the structure of the magnetic steel in the core shown;

[0066] Fig.13 for Figure 5 A schematic diagram of the structure of the partition unit in the core shown;

[0067] Fig.14 A schematic diagram of the structure of another kernel provided in an embodiment of the present application;

[0068] Fig.15 for Fig.14 Exploded view of the kernel shown;

[0069] Fig.16 for Fig.14 The cross-section of the inner core along the CC' direction is shown;

[0070] Fig.17 for Fig.14 A schematic diagram of the front structure of the partition unit in the core shown;

[0071] Fig.18 for Fig.14 A schematic diagram of the back structure of the partition unit in the core shown;

[0072] Fig.19 for Fig.14 A partial enlarged view of the appearance of the inner core shown;

[0073] Fig. 20 for Fig.17 The partition unit is assembled to Fig.19 The position relationship diagram when the appearance part is shown;

[0074] Fig.21 for Fig.14 A schematic diagram of the back structure of the magnetic steel in the core shown;

[0075] Fig. 22 for Fig.21 The cross-sectional view of the magnetic steel along the EE' direction;

[0076] Fig.23 A schematic diagram of the structure of another kernel provided in an embodiment of the present application;

[0077] Fig.24 for Fig.23 The cross-section of the inner core along the DD' direction is shown;

[0078] Fig.25 for Fig.23 Structural schematic diagram of the partition structure in the core shown.

[0079] Reference numerals:

[0080] 10-display module; 11-cover plate; 12-display screen; 20-back cover; 30-middle frame; 31-sound hole; 40-main board; 50-sub-board; 60-flexible circuit board; 70-battery; 80-speaker module; 81-sound channel; 82-housing; 83-core; 100-mobile phone;

[0081] 821-front housing; 822-rear housing; 8221-protection part; 8222-assembly part; 8223-fixing hole;

[0082] 831-bracket; 8311-appearance portion; 8312-support portion; 83111-first surface; 83112-second surface; 83113-outer side wall; 83114-raised portion; 83114a-platform; 83115-first appearance sub-portion; 83116-second appearance sub-portion; 83117-inner side wall;

[0083] 832-diaphragm system; 8321-dome; 8322-diaphragm; 83221-third fixing part; 83222-folding ring; 83223-second fixing part; 8323-voice coil; 83231-third surface; 83232-fourth surface; 8324-signal receiving structure; 83241-signal receiving unit; 83242-first fixing part; 83243-movable part; 83244-connecting part; 83245-gap;

[0084] 833-magnetic circuit system; 8331-magnetic steel; 83311-outer surface; 83312-inner surface; 83313-hollow part; 83314-step; 83315-annular step; 83316-groove; 8332-magnet group; 83321-center magnet; 83322-edge magnet; 83323-magnetic gap;

[0085] 834-partition structure; 8341-shielding piece; 8342-ventilation piece; 83421-ventilation hole; 8343-partition unit; 83431-shielding portion; 83432-ventilation portion; 83432a-first portion; 83432b-second portion; 83432c-middle portion; 83432c1-fixing sub-portion; 83432c2-supporting sub-portion; 83432d-upper surface; 83432e-lower surface, 83432f-inner surface; 83432g-outer surface; 83433-flange. DETAILED DESCRIPTION

[0086] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0087] The term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0088] The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects rather than to describe a specific order of objects. For example, a first target object and a second target object are used to distinguish different target objects rather than to describe a specific order of target objects.

[0089] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0090] In the description of the embodiments of the present application, unless otherwise specified, the meaning of "multiple" refers to two or more than two. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

[0091] The embodiment of the present application provides an electronic device, which may be a mobile phone, a tablet computer, a laptop computer, a personal digital assistant (PDA), a car computer, a television, a smart wearable device (such as a smart watch, a smart bracelet, a smart head-mounted display, smart glasses), a smart home device, or other device including a speaker module. The embodiment of the present application does not specifically limit the specific form of the above electronic device. For the convenience of explanation, the following description takes the electronic device as an example.

[0092] See also Figure 1 and Figure 2 , Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application, Figure 2 for Figure 1 An exploded view of the electronic device shown. Figure 1 and Figure 2 As shown, the mobile phone 100 includes a display module 10, a back cover (also called a battery cover) 20, a middle frame 30, a main board 40, a sub-board 50, a flexible printed circuit (FPC) 60 connecting the main board 40 and the sub-board 50, a battery 70 and at least one speaker module 80 and other structures.

[0093] Understandably, Figure 1 and Figure 2 The following figures and the related drawings only schematically illustrate some components of the mobile phone 100, and the actual shapes, sizes, positions and structures of these components are not subject to Figure 1 and Figure 2 In addition, when the electronic device is a device of some other form, the electronic device 100 may not include at least one of the display module 10 , the back cover 20 , the middle frame 30 , the sub-board 50 , the FPC 60 , and the battery 70 .

[0094] Figure 1 and Figure 2 In the figure, the mobile phone 100 is in the shape of a rectangular flat plate. In order to facilitate the clear description of the subsequent structural features and the positional relationship of the structural features, the positional relationship of the various structures in the mobile phone is specified in the X-axis direction, the Y-axis direction and the Z-axis direction, wherein the X-axis direction is the width direction of the mobile phone, the Y-axis direction is the length direction of the mobile phone, and the Z-axis direction is the thickness direction of the mobile phone. It can be understood that the coordinate system (i.e., the X-axis, Y-axis and Z-axis) of the electronic device can be flexibly set according to actual needs, and no specific limitation is made here. In other optional embodiments, the shape of the electronic device can also be a square flat plate, a circular flat plate, an elliptical flat plate, etc. Of course, the electronic device can also be a foldable electronic device, etc.

[0095] The display module 10 includes a cover plate 11 and a display screen 12 stacked along the Z-axis direction. The cover plate 11 protects the display screen 12, for example. The display screen 12 includes, for example, a liquid crystal display (LCD), an organic light emitting diode (OLED) display screen, and an LED display screen, among which the LED display screen includes, for example, a Micro-LED display screen, a Mini-LED display screen, and the like. The embodiment of the present application does not limit the type of the display screen 12.

[0096] Along the Z-axis direction, the back cover 20 is located on the side of the display screen 12 away from the cover plate 11, wherein the material of the back cover 20 may include, for example, opaque materials such as plastic, plain leather, and glass fiber; or may include translucent materials such as glass. The material of the back cover 20 is not limited in the embodiment of the present application.

[0097] The middle frame 30 is located between the cover plate 11 and the back cover 20. The cover plate 11, the middle frame 30 and the back cover 20 can enclose a whole machine cavity. The display screen 12, the main board 40, the sub-board 50, the FPC 60, the battery 70, the speaker module 80 and other structures are located in the whole machine cavity.

[0098] A control chip is integrated on the mainboard 40. The control chip includes, for example, a system on chip (SoC) and an application processor (AP). Among them, the SoC integrates, for example, a central processing unit (CPU), a graphic processing unit (GPU), a modem, and the like.

[0099] The sub-board 50 integrates an antenna radio frequency front end, a Universal Serial Bus (USB) device, and the like.

[0100] The FPC 60 is used to electrically connect the main board 40 and the sub-board 50 to achieve data and signal transmission between the main board 40 and the sub-board 50 .

[0101] The battery 70 is located between the main board 40 and the sub-board 50, and is used to supply power to the mobile phone 100, such as the display screen 12, devices on the main board 40, devices on the sub-board 50, and the speaker module 80, to ensure normal operation.

[0102] The speaker module 80 is used to convert audio signals such as music and voice into sound, and can support the function of external audio. Along the Y-axis direction, the speaker module 80 is located on the side of the battery 70 away from the main board 40, that is, it is arranged adjacent to the sub-board 50 and is electrically connected to the sub-board 50. In this case, the audio signal sent by the main board 40 is transmitted to the speaker module 80 via the FPC 60 and the sub-board 50, and is converted into sound output by the speaker module 80. Specifically, the speaker module 80 has a sound outlet channel 81, and accordingly, a sound outlet hole 31 is opened on the middle frame 30, which is connected to the sound outlet channel 81. After the sound converted by the speaker module 80 is output by the sound outlet channel 81, it is further output to the outside of the mobile phone 100 by the sound outlet hole 31.

[0103] It should be noted that Figure 1 and Figure 2 The description is made by taking the case where the number of speaker modules 80 is one and the speaker module 80 is located on the side of the battery 70 away from the main board 40 as an example. In other optional embodiments of the present application, the speaker module 80 may also be arranged adjacent to the main board 40 and electrically connected to the main board 40. In this case, the main board 40 sends the audio signal to the speaker module 80 electrically connected thereto, and the audio signal is converted into sound output by the speaker module 80; or, the number of speaker modules 80 is greater than or equal to two, at least one speaker module 80 is arranged adjacent to the sub-board 50 and electrically connected to the sub-board 50, and at least one speaker module 80 is arranged adjacent to the main board 40 and electrically connected to the main board 40.

[0104] See also Figure 3 and Figure 4 , Figure 3 A schematic diagram of the structure of a speaker module provided in an embodiment of the present application is shown in FIG. Figure 4 for Figure 3 The cross-sectional view of the speaker module along the AA' direction is shown. Figure 3 and Figure 4 As shown, the speaker module 80 includes a shell 82 and a core 83. The shell 82 may be an independent shell structure (in which case the speaker module may be referred to as a sealed speaker module), or may be at least partially surrounded by other components of the electronic device (in which case the speaker module may be referred to as an open speaker module), which is not limited here. Figure 3 and Figure 4 The description is made by taking the shell 82 as an independent shell structure as an example. In this case, the shell 82 includes a front shell 821 and a rear shell 822. Along the Z-axis direction, the front shell 821 is located on the side of the rear shell away from the rear cover 20. The shell 82 is formed by assembling the front shell 821 and the rear shell 822, which is conducive to reducing the molding and assembly difficulties of the shell 82. The front shell 821 and the rear shell 822 surround a housing cavity.

[0105] Continue to see Figure 3 In some embodiments, along the X-axis direction, the rear housing 822 includes a protection portion 8221 and an assembly portion 8222, and along the Z-axis direction, the front housing 821 is opposite to the assembly portion 8222, and the front housing 821 is fixed to the assembly portion 8222, so that the front housing 821 and the assembly portion 8222 surround the accommodating cavity. Since the assembly portion 8222 is not provided on the protection portion 8221, some space can be reserved for arranging other structures in the mobile phone 100, and the protection portion 8221 can protect the components located below it (the side of the protection portion 8221 facing away from the rear cover 20).

[0106] It should be noted that the front housing 821 and the assembly portion 8222 are relative to each other, that is, the orthographic projection of the front housing 821 on the plane formed by the X-axis and the Y-axis overlaps with the orthographic projection of the assembly portion 8222 on the plane formed by the X-axis and the Y-axis.

[0107] Continue to see Figure 3 In some embodiments, a fixing hole 8223 is provided on the shell 82 (such as the protection portion 8221 ), and the fixing hole 8223 can be cooperated with a screw or the like to fix the speaker module 80 in the entire cavity of the mobile phone 100 .

[0108] The core 83 is disposed in the shell 82, and the housing cavity of the shell 82 is divided into a front cavity Q1 and a rear cavity Q2, wherein the front cavity Q1 is communicated with the sound outlet channel 81, and a ventilation channel (not shown in the figure) connecting the core 83 and the rear cavity Q2 is provided between the core 83 and the rear cavity Q2 to realize ventilation between the core 83 and the rear cavity Q2. When the core 83 is working, it can push the air in the front cavity Q1 to vibrate, and the vibrating air in the front cavity Q1 is led out of the sound outlet channel 81 to form sound, and further the sound is led out of the mobile phone 100 through the sound outlet hole 31 communicated with the sound outlet channel 81, so as to be heard by the user.

[0109] It should be noted that when the core 83 is arranged in the shell 82, there is also an assembly relationship between the core 83 and the rear shell 822. That is to say, when the speaker module 80 is formed, the rear shell 822 has an assembly relationship not only with the front shell 821, but also with the core 83. The details can be referred to in the existing technology and will not be repeated here.

[0110] As can be seen from the background technology, with the trend of electronic devices becoming thinner and smaller, the volume of the back cavity is limited. In order to obtain a better audio experience, acoustic enhancement materials (such as bass acoustic enhancement materials) are generally filled in the back cavity of the speaker module to enhance the virtual space of the back cavity. However, after research, it was found that the core material of the acoustic enhancement material will enter the inner core of the speaker module through the ventilation channel connecting the inner core 83 and the back cavity Q2, affecting the vibration of the diaphragm, and thus affecting the normal operation of the speaker module.

[0111] Based on this, an embodiment of the present application provides a core, which prevents the core material of the acoustic enhancement material from entering the core of the speaker module through the ventilation channel by setting a partition structure at the ventilation channel connecting the core 83 and the rear cavity Q2, and ventilation holes are set on the partition structure to ensure the ventilation volume of the core 83 and the rear cavity Q2.

[0112] The following is a detailed introduction to the kernel structure using different examples.

[0113] For an example, see Figure 5 , Figure 6 and Figure 7 As shown, Figure 5 A schematic diagram of the structure of a kernel provided in an embodiment of the present application, Figure 6 for Figure 5 An exploded view of the kernel shown, Figure 7 for Figure 5 The cross-section of the core along the BB' direction is shown in FIG. Figure 5 , Figure 6 and Figure 7 As shown, the core 83 includes a bracket 831 , a diaphragm system 832 , a magnetic circuit system 833 and a partition structure 834 .

[0114] The bracket 831 is used to support the diaphragm system 832 and fix the magnetic circuit system 833 and the partition structure 834. The bracket 831 includes an appearance part 8311 and a support part 8312. The appearance part 8311 is in a rectangular ring shape, and the support part 8312 is fixed on the appearance part 8311 and is located in the ring structure formed by the appearance part 8311.

[0115] Combination Figure 8 , Figure 8 for Figure 5 The schematic diagram of the structure of the appearance part of the kernel is shown in FIG. Figure 8 As shown, along the Z-axis direction, the appearance part 8311 includes a first surface 83111 and a second surface 83112 opposite to each other, and also includes an outer side wall 83113 and an inner side wall 83117 connecting the first surface 83111 and the second surface 83112. At least one protrusion 83114 is provided on the first surface 83111, wherein: Figure 8 The description is based on the number of protrusions 83114 being four, and the four protrusions 83114 are disposed at four corners of the rectangular ring-shaped appearance portion 8311. The appearance portion 8311 includes two first appearance sub-portions 83115 disposed opposite to each other along the X-axis direction and two second appearance sub-portions 83116 disposed opposite to each other along the Y-axis direction.

[0116] Please continue to see Figure 6 and Figure 7 The diaphragm system 832 is the main body for pushing the air in the front cavity Q1 of the speaker module 80. The diaphragm system 832 includes a diaphragm group, a voice coil 8323 and a signal receiving structure 8324, wherein the diaphragm group includes a dome 8321 and a diaphragm 8322.

[0117] Combination Fig. 9 , Fig. 9 for Figure 5 The schematic diagram of the structure of the diaphragm group in the core is shown in FIG. Figure 7 and Fig. 9 As shown, the dome 8321 is in the shape of a rectangular plate, the diaphragm 8322 is in the shape of a rectangular ring, and is arranged around the periphery of the dome 8321. The diaphragm 8322 includes a third fixing portion 83221, a folding ring 83222, and a second fixing portion 83223 connected in sequence. The folding ring 83222 is arranged around the third fixing portion 83221, and the second fixing portion 83223 is arranged around the folding ring 83222. The folding ring 83222 is a structure formed by the portion of the diaphragm 8322 located between the third fixing portion 83221 and the second fixing portion 83223 protruding along the Z-axis direction. The cross-sectional shape of the folding ring 83222 is, for example, an arc or approximately an arc. The folding ring 83222 of the diaphragm 8322 can be deformed when subjected to external force, so that the dome 8321 can vibrate up and down in the Z-axis direction relative to the third fixing portion 83221 and the second fixing portion 83223.

[0118] The third fixing portion 83221 is fixed to the edge of the dome 8321 to achieve the connection between the dome 8321 and the diaphragm 8322, and the second fixing portion 83223 is fixed to the exterior portion 8311 to achieve the fixed connection between the diaphragm group and the bracket 831. In other words, the dome 8321 is located in the annular structure formed by the diaphragm 8322 and is fixedly connected to the diaphragm 8322, and the fixedly connected dome 8321 and diaphragm 8322 are fixed to the second surface 83112 of the exterior portion 8311.

[0119] It is understandable that in order to ensure the firmness of the connection between the second fixing portion 83223 and the appearance portion 8311 , the second fixing portion 83223 may extend to the side wall 83113 of the appearance portion 8311 .

[0120] The embodiment of the present application does not limit the way in which the third fixing portion 83221 is fixed to the edge of the dome 8321, and the way in which the second fixing portion 83223 is fixed to the appearance portion 8311. For example, the fixing may be performed by welding or adhesive bonding.

[0121] Please continue to see Figure 6 and Figure 7 The voice coil 8323 is in a rectangular ring shape. Of course, the voice coil 8323 can also be in a circular ring shape, an elliptical ring shape, or an anisotropic ring shape. Along the Z-axis direction, the voice coil 8323 includes a third surface 83231 and a fourth surface 83232. The third surface 83231 is used to be fixed to the dome 8321. The end of the fourth surface 83232 of the voice coil 8323, for example, extends into the magnetic circuit system 833 to cooperate with the magnetic circuit system 833.

[0122] The signal receiving structure 8324 is electrically connected to the main board 40 and the sub-board 50 of the mobile phone 100. The signal receiving structure 8324 can be an FPC, a wire, etc., and this application does not make any specific limitation on this.

[0123] Combination Fig.10 , Fig.10 for Figure 5 The schematic diagram of the signal receiving structure in the kernel is shown in FIG. Fig.10As shown, the signal receiving structure 8324 includes two symmetrically arranged signal receiving units 83241, and the symmetry axis is, for example, parallel to the Y axis. The signal receiving unit 83241 includes a first fixed portion 83242 and a movable portion 83243 spaced apart along the X axis direction, and also includes a connecting portion 83244 connecting the first fixed portion 83242 and the movable portion 83243, and the connecting portion 83244 is located in the gap 83245 between the first fixed portion 83242 and the movable portion 83243. The signal receiving unit 83241 is fixed to the first surface 83111 of the appearance part 8311 through the first fixing part 83242. Exemplarily, the first fixing part 83242 of one signal receiving unit 83241 is fixed to the first surface 83111 of one first appearance sub-part 83115, and the first fixing part 83242 of the other signal receiving unit 83241 is fixed to the first surface 83111 of the other first appearance sub-part 83115, so as to fix the signal receiving structure 8324 to the bracket 831. The movable parts 83243 of the two signal receiving units 83241 are respectively fixed to the opposite ends of the voice coil 8323 and are located on the fourth surface 83232, so as to realize the electrical connection between the signal receiving structure 8324 and the voice coil 8323.

[0124] Along the Z-axis direction, the movable portion 83243 can vibrate up and down relative to the first fixed portion 83242 to avoid interfering with the vibration of the voice coil 8323. And because the two signal receiving units 83241 are symmetrically arranged, the resistance exerted by the two signal receiving units 83241 on the vibration of the voice coil 8323 is equal or approximately equal, thereby reducing the possibility of rolling vibration of the vibration system.

[0125] The magnetic circuit system 833 is used to cooperate with the voice coil 8323 to drive the diaphragm group to vibrate. Figure 6 and Figure 7 , the magnetic circuit system 833 includes a magnetic steel 8331 and a magnet group 8332. Along the Z-axis direction, the magnetic steel 8331 includes an outer surface 83311 and an inner surface 83312 opposite to each other. The magnet group 8332 is located on the side of the inner surface 83312 away from the outer surface 83311, and is fixedly connected to the magnetic steel 8331 by, for example, bonding. The magnetic circuit system 833 is fixed on the support portion 8312 of the bracket 831 to achieve the connection between the magnetic circuit system 833 and the bracket 831, wherein the magnet group 8332 is located between the inner surface 83312 and the support portion 8312, and the magnetic steel 8331, the bracket 831, the dome 8321 and the diaphragm 8322 surround an inner core cavity, and the support portion 8312, the magnet group 8332, a part of the signal receiving structure 8324 and the voice coil 8323 are located in the inner core cavity.

[0126] Combination Fig.11 , Fig.11 for Figure 5The schematic diagram of the structure of the magnet group in the core is shown in FIG. Fig.11 As shown, the magnet group 8332 includes a central magnet 83321 and at least one edge magnet 83322, and the edge magnet 83322 is arranged around the circumference of the central magnet 83321, and a magnetic gap 83323 is defined between the central magnet 83321 and the edge magnet 83322. The end portion where the fourth surface 83232 of the voice coil 8323 is located extends into the magnetic gap 83323. Of course, the end portion where the fourth surface 83232 of the voice coil 8323 is located may not extend into the magnetic gap 83323.

[0127] Specifically, a magnetic loop is formed between the central magnet 83321 and the edge magnet 83322. When the voice coil 8323 receives a signal from the signal receiving structure 8324, the voice coil 8323 drives the diaphragm group to vibrate under the action of the magnetic field in the magnetic gap 83323. By constraining the magnetic lines of force by the magnetic steel 8331, the magnetic field strength in the magnetic gap 83323 can be increased, thereby improving the driving strength of the diaphragm group.

[0128] It should be noted that the embodiment of the present application does not limit the number of edge magnets 83322, and the above examples are all described by taking the number of edge magnets 83322 as four. The embodiment of the present application does not limit the shapes of the central magnet 83321 and the edge magnet 83322, and the above examples are all described by taking the central magnet 83321 and the edge magnet 83322 as rectangular flat plate structures.

[0129] In this case, two of the edge magnets 83322 are located on opposite sides of the length direction of the center magnet 83321, and the length directions of the two edge magnets 83322 are opposite to (i.e., parallel to) the length direction of the center magnet 83321; the other two edge magnets 83322 are located on opposite sides of the width direction of the center magnet 83321, and the length directions of the two edge magnets 83322 are opposite to (i.e., parallel to) the width direction of the center magnet 83321.

[0130] In order to achieve ventilation with the rear cavity Q2, a plurality of larger ventilation channels are provided between the magnetic steel 8331 and the bracket 831, and the ventilation channels connect the rear cavity Q2 and the inner core cavity of the inner core 83.

[0131] In combination with the above structure, the working principle of the speaker module 80 is briefly introduced below.

[0132] After receiving the signal from the main board 40 or the sub-board 50, the signal receiving structure 8324 transmits it to the voice coil 8323 connected to its movable part 83243. The signal of the voice coil 8323 is an AC signal, which forms an alternating magnetic field. The alternating magnetic field generates an Ampere force in the magnetic gap 83323, pushing the voice coil 8323 to vibrate up and down along the Z axis, thereby pushing the ball top 8321 to vibrate. When the ball top 8321 vibrates, it pushes the air in the front cavity Q1 to vibrate. The vibrating air in the front cavity Q1 is guided out from the sound outlet channel 81 to form sound, and further guides the sound out of the mobile phone 100 through the sound outlet hole 31 of the sound outlet channel 81 to be heard by the user.

[0133] When the voice coil 8323 vibrates, the movable portion 83243 on the voice coil 8323 vibrates along with the voice coil 8323. When vibrating in the direction of the magnetic steel 8331, in order to prevent the movable portion 83243 from passing through the gap between two adjacent edge magnets 83322 and contacting the magnetic steel 8331. Fig.12 , Fig.12 for Figure 5 The schematic diagram of the structure of the magnetic steel in the core is shown in FIG. Fig.12 As shown, along the Z-axis direction, a hollow portion 83313 is provided on the overlapping portion of the magnetic steel 8331 and the movable portion 83243, that is, the orthographic projection of the hollow portion 83313 on the plane formed by the X-axis and the Y-axis overlaps with the orthographic projection of the movable portion 83243 on the plane formed by the X-axis and the Y-axis, so as to leave space for the vibration of the movable portion 83243 and avoid the vibration of the movable portion 83243.

[0134] As can be seen from the above content, in order to increase the virtual space of the rear cavity Q2, the acoustic enhancement material will be filled in the rear cavity Q2. However, due to the large ventilation channel between the magnetic steel 8331 and the bracket 831 and the hollow portion 83313 provided on the magnetic steel 8331, the powdered acoustic enhancement material enters the inner core cavity of the inner core 83 through the ventilation channel and the hollow portion 83313, affecting the vibration of the diaphragm system, etc. Therefore, in order to prevent the acoustic enhancement material from entering the inner core cavity of the inner core 83, please continue to refer to Figure 5 , Figure 6 and Figure 7The inner core 83 also includes the partition structure 834 mentioned above. The partition structure 834 includes a shielding member 8341 and a ventilation member 8342. The shielding member 8341 covers the hollow portion 83313 and is used to shield the hollow portion 83313, that is, the orthographic projection of the shielding member 8341 on the plane formed by the X-axis and the Y-axis covers the orthographic projection of the hollow portion 83313 on the plane formed by the X-axis and the Y-axis. The ventilation member 8342 is used to block the larger ventilation channel (also called ventilation gap) between the magnetic steel 8331 and the bracket 831, and the ventilation member 8342 is provided with a plurality of circular ventilation holes 83421 arranged in an array, and the ventilation holes 83421 are used to realize the ventilation of the diaphragm group and the rear cavity Q2 of the core 83, that is, when the partition structure 834 is not provided, the ventilation channel between the magnetic steel 8331 and the bracket 831 can realize the ventilation of the diaphragm group and the rear cavity Q2 to ensure the normal vibration of the diaphragm group. After the partition structure 831 is provided, the ventilation holes 83421 on the partition structure 834 realize the ventilation of the diaphragm group and the rear cavity Q2 to ensure the normal vibration of the diaphragm group.

[0135] However, considering that when a shielding member 8341 is provided on the magnetic steel 8331, the total thickness (dimension along the Z-axis direction) of the core 83 will increase, thereby increasing the thickness of the speaker module 80, which is contrary to the requirements of the lightweight design of electronic devices.

[0136] Continue to see Fig.12 A step 83314 is provided at the position of the magnet 8331 corresponding to the hollow portion 83313. The step 83314 is a structure formed by the outer surface 83311 of the magnet 8331 and the edge area being recessed along the Z-axis direction. The shielding member 8341 is located at the step 83314 and is flush with the outer surface 83311 of the area where the step 83314 is not provided.

[0137] In order to reduce the difficulty of manufacturing the partition structure 834 and to ensure the integrity of the magnetic steel 8331 as much as possible, the partition structure 834 includes two symmetrically arranged partition units 8343, and the symmetry axis is parallel to the Y axis, for example. Fig.13 , Fig.13 for Figure 5 The schematic diagram of the structure of the partition unit in the core is shown in FIG. Fig.13As shown, the partition unit 8343 includes a shielding portion 83431 (the shielding portions 83431 of the two partition units 8343 are shielding members 8341) and a ventilation portion 83432 (the ventilation portions 83432 of the two partition units 8343 are ventilation members 8342), wherein the shielding portion 83431 of one partition unit 8343 shields two hollow portions 83313, and the shielding portion 83431 of the other partition unit 8343 shields the other two hollow portions 83313. The gap between the two partition units 8343 can leave a certain space for the magnetic steel 8331, so that the integrity of the magnetic steel 8331 is better.

[0138] In the embodiment of the present application, by providing a partition structure 834, the hollow portion 83313 is shielded while ensuring the ventilation volume of the core 83 and the rear cavity Q2, and the powdered acoustic enhancement material can be prevented from entering the core cavity of the core 83 through the ventilation channel and the hollow portion 83313. In addition, by providing a step 83314 at the position of the magnetic steel 8331 corresponding to the hollow portion 83313, and providing the shielding member 8341 of the partition structure 834 at the step 83314, the thickness of the core 83 is reduced.

[0139] In another example, this example is an optimization of the first example, which can further reduce the height of the core and make the integrity of the magnetic steel better. Fig.14 , Fig.15 and Fig.16 As shown, Fig.14 A schematic diagram of the structure of another kernel provided in an embodiment of the present application, Fig.15 for Fig.14 An exploded view of the kernel shown, Fig.16 for Fig.14 The cross-section of the core along the CC' direction is shown in FIG. Fig.14 , Fig.15 and Fig.16 As shown, different from the above example, the partition unit 8343 only includes the ventilation part 83432. Fig.17 and Fig.18 , Fig.17 for Fig.14 The front structural diagram of the partition unit in the core is shown. Fig.18 for Fig.14 The back structure diagram of the partition unit in the core is shown in FIG. Fig.17 and Fig.18 As shown, along the Z-axis direction, the ventilation portion 83432 includes an upper surface 83432d and a lower surface 83432e relative to each other, the upper surface 83432d is located on the side of the lower surface 83432e away from the support portion 8312, and the ventilation portion 83432 also includes an inner surface 83432f and an outer surface 83432g connecting the upper surface 83432d and the lower surface 83432e.

[0140] Please continue to see Fig.17 and Fig.18 The ventilation portion 83432 includes a first portion 83432a (a plane where the first portion 83432a is located is, for example, parallel to a plane formed by the Y-axis and the Z-axis) and second portions 83432b located on both sides of the first portion 83432a (a plane where the second portion 83432b is located is, for example, parallel to a plane formed by the X-axis and the Z-axis), and also includes two middle portions 83432c connecting one end of one of the first portions 83432a and the second portion 83432b and connecting the other end of the other first portion 83432a and the second portion 83432b, that is, one of the middle portions 83432c connects one end of one of the first portions 83432a and the second portion 83432b, and the other middle portion 83432c connects the other end of the other first portion 83432a and the second portion 83432b. A plurality of long strip-shaped ventilation holes 83421 are provided on the first part 83432a and the second part 83432b, and the ventilation holes 83421 penetrate the inner surface 83432f and the outer surface 83432g to realize ventilation between the inner core 83 and the rear cavity Q2, wherein the ventilation holes 83421 on the first part 83432a extend, for example, along the Z-axis direction or along the Y-axis direction, and the ventilation holes 83421 on the second part 83432b extend, for example, along the Z-axis direction or along the X-axis direction.

[0141] When the ventilation holes 83421 on the first portion 83432a and the ventilation holes 83421 on the second portion 83432b extend along the Z-axis direction, the multiple ventilation holes 83421 on the first portion 83432a and the multiple ventilation holes 83421 on the second portion 83432b are arranged in a row and multiple columns, that is, the multiple ventilation holes 83421 on the first portion 83432a are arranged from one edge of the first portion 83432a (the edge adjacent to one of the second portions 83432b, also referred to as the first edge) to the other edge (the edge adjacent to the other second portion 83432b). 32b is adjacent to the edge, also called the second edge), and the multiple ventilation holes 83421 on the second part 83432b are arranged from one edge of the second part 83432b (the edge adjacent to the first part 83432a, also called the fifth edge) to another edge (the edge of the second part 83432b farthest from the first part 83432a, also called the sixth edge), and the two ends of the ventilation holes 83421 with the longest distance are respectively adjacent to the upper surface 83432d and the lower surface 83432e of the ventilation part 83432, so as to ensure that the area of ​​the ventilation holes 83421 is larger. When the ventilation holes 83421 on the first part 83432a extend along the Y-axis direction and the ventilation holes 83421 on the second part 83432b extend along the X-axis direction, the multiple ventilation holes 83421 on the first part 83432a and the multiple ventilation holes 83421 on the second part 83432b are arranged in multiple rows and one column, that is, the multiple ventilation holes 83421 on the first part 83432a are arranged by the upper surface 83432d of the first part 83432a. To the lower surface 83432e, the multiple ventilation holes 83421 on the second part 83432b are arranged from the upper surface 83432d of the second part 83432b to the lower surface 83432e, and the two ends of the ventilation holes 83421 on the first part 83432a with the longest distance are respectively adjacent to the two ends of the first part 83432a (the two ends are respectively adjacent to the two second parts 83432b) to ensure that the area of ​​the ventilation holes 83421 is larger.

[0142] The long strip-shaped ventilation holes 83421 increase the opening rate (the ratio of the total area of ​​the ventilation holes 83421 to the area of ​​the blocking portion 83431), which can ensure a large ventilation volume. In this way, the height of the ventilation portion 83432 in the Z-axis direction can be made smaller, which is beneficial to the lightweight design of the inner core 83 and can increase the thickness of the magnet 8331 (when the thickness of the magnet 8331 increases, the ventilation volume is large, even if the ventilation holes 83421 are partially blocked, the ventilation volume can also be guaranteed), thereby increasing the magnetic field strength in the magnetic gap 83323 and improving the driving strength of the diaphragm group. In addition, since the partition unit 8343 does not include the shielding portion 83431, that is, in the Z-axis direction, the shielding portion 83431 is not set on the magnet 8331, this can save a layer of wall thickness and the gap between the shielding portion 83431 and the magnet 8331, thereby further reducing the thickness of the inner core 83 in the Z-axis direction, and since there is no need to set a step, the integrity of the magnet can be better ensured, further increasing the magnetic field strength in the magnetic gap 83323, and improving the driving strength of the diaphragm group.

[0143] In order to ensure the ventilation volume and the strength of the partition unit, continue to refer to Fig.17 , the length of the ventilation hole 83421 of the first part 83432a satisfies: (2 / 5) L2≤L1≤(9 / 10) L2, wherein L1 is the length of the ventilation hole 83421 of the first part 83432a, and L2 is the length of the first part 83432a.

[0144] When the two ends of the ventilation hole 83421 of the first part 83432a extend to the first edge and the second edge respectively, the length of the ventilation hole 83421 is the size of the ventilation hole 83421 along the second direction, the length of the first part 83432a is the size of the first part 83432a along the second direction, and the second direction is the direction from the first edge to the second edge.

[0145] When both ends of the ventilation hole 83421 of the first part 83432a extend to the third edge and the fourth edge respectively, the length of the ventilation hole 83421 is the size of the ventilation hole 83421 along the first direction, and the length of the first part 83432a is the size of the first part 83432a along the first direction.

[0146] Exemplarily, the length of the ventilation hole 83421 of the first part satisfies: L1=(2 / 5)L2, L1=(9 / 10)L2, L1=(1 / 2)L2, L1=(3 / 5)L2, L1=(7 / 10)L2 or L1=(4 / 5)L2, etc.

[0147] The length of the ventilation hole 83421 of the second part 83432b satisfies: (2 / 5) L3≤L4≤(9 / 10)L3, wherein L4 is the length of the ventilation hole 83421 of the second part 83432b, and L3 is the length of the second part 83432b; when the two ends of the ventilation hole 83421 of the second part 83432b extend to the fifth edge and the sixth edge respectively, the length of the ventilation hole 83421 is the size of the ventilation hole 83421 along the third direction, and the length of the second part 83432b is the size of the second part 83432b along the third direction, and the third direction is the direction from the fifth edge to the sixth edge.

[0148] When both ends of the ventilation hole 83421 of the second part 83432b extend to the seventh edge and the eighth edge respectively, the length of the ventilation hole 83421 is the size of the ventilation hole 83421 along the first direction, and the length of the second part 83432b is the size of the second part along the first direction.

[0149] Exemplarily, the length of the ventilation hole 83421 of the second portion 83432b satisfies: L4=(2 / 5)L3, L4=(9 / 10)L3, L4=(1 / 2)L3, L4=(3 / 5)L3, L4=(7 / 10)L3 or L4=(4 / 5)L3, etc.

[0150] In order to ensure the ventilation volume and strength of the partition unit 8343 , the distance between two adjacent ventilation holes 83421 satisfies: (1 / 4) W2≤W1≤2W2, wherein W1 is the distance between two adjacent ventilation holes 83421 , and W2 is the width of the ventilation hole 83421 .

[0151] When the two ends of the ventilation hole 83421 of the first part 83432a extend to the first edge and the second edge respectively, the width of the ventilation hole 83421 is the size of the ventilation hole 83421 along the first direction, and the spacing between two adjacent ventilation holes 83421 is the distance between the two ventilation holes 83421 along the first direction.

[0152] When the two ends of the ventilation hole 83421 of the first part 83432a extend to the third edge and the fourth edge respectively, the width of the ventilation hole 83421 is the size of the ventilation hole 83421 along the second direction, the spacing between two adjacent ventilation holes 83421 is the distance between the two ventilation holes 83421 along the second direction, and the second direction is the direction from the first edge to the second edge.

[0153] When the two ends of the ventilation hole 83421 of the second part 83432b extend to the fifth edge and the sixth edge respectively, the width of the ventilation hole 83421 is the size of the ventilation hole 83421 along the first direction, and the spacing between two adjacent ventilation holes 83421 is the distance between the two ventilation holes 83421 along the first direction.

[0154] When the two ends of the ventilation hole 83421 of the second part 83432b extend to the seventh edge and the eighth edge respectively, the width of the ventilation hole 83421 is the size of the ventilation hole 83421 along the second direction, the spacing between two adjacent ventilation holes 83421 is the distance between the two ventilation holes 83421 along the second direction, and the second direction is the direction from the fifth edge to the sixth edge.

[0155] Exemplarily, the distance between two adjacent ventilation holes satisfies: W1=(1 / 4)W2, W1=2W2, W1=W2, W1=(1 / 2)W2 or W1=1.5W2, etc.

[0156] It should be noted that the embodiments of the present application are all described using the cross-sectional shape of the ventilation hole 83421 as a rectangle, but this does not constitute a limitation of the present application. In other optional embodiments, the cross-sectional shape of the ventilation hole 83421 can also be an ellipse, an "S" shape, etc.

[0157] The so-called cross-sectional shape refers to the shape of the orthographic projection of the multiple ventilation holes 83421 on the first part 83432a on the plane formed by the Y-axis and the Z-axis, and the shape of the orthographic projection of the multiple ventilation holes 83421 on the second part 83432b on the plane formed by the X-axis and the Z-axis in the embodiment.

[0158] It can be understood that the opening ratio of the ventilation holes 83421 is the ratio of the total area of ​​the orthographic projections of the ventilation holes 83421 in the first part 83432a on the plane formed by the Y axis and the Z axis to the total area of ​​the orthographic projections of the ventilation holes 83421 in the second part 83432b on the plane formed by the X axis and the Z axis to the area of ​​the orthographic projections of the first part 83432a on the plane formed by the Y axis and the Z axis and the area of ​​the orthographic projections of the second part 83432b on the plane formed by the X axis and the Z axis.

[0159] Please continue to see Fig.17 and Fig.18 The middle part 83432c includes a fixing sub-part 83432c1 and a supporting sub-part 83432c2 fixed to the fixing sub-part 83432c1, wherein the fixing sub-part 83432c1 and the supporting sub-part 83432c can be integrally formed or separately formed and then fixed together by bonding or welding. Fig.19 , Fig.19 for Fig.14A partial enlarged view of the appearance of the kernel is shown, Fig.19 As shown, the portion of the protrusion 83114 on the appearance portion 8311 facing the inner wall 83117 is recessed along the Z-axis direction to form a platform 83114a.

[0160] See also Fig. 20 , Fig. 20 for Fig.17 The partition unit shown is assembled to Fig.19 The position relationship diagram of the appearance part is shown. Fig. 20 As shown, the fixed sub-portion 83432c1 of the ventilation portion 83432 can be fixed on the platform 83114a by welding or dispensing, for example, to realize the fixed connection between the ventilation portion 83432 and the bracket 831, wherein along the Z-axis direction, the ventilation portion 83432 is located on the side of the signal receiving unit 83241 away from the appearance portion 8311. The four corners of the magnetic steel 8331 are respectively fixed on the four supporting sub-portions 83432c2 corresponding to the protruding portion 83114, and the central magnet 83321 and the edge magnet 83322 fixed on the inner surface 83312 of the magnetic steel 8331 are located on the supporting portion 8312 of the bracket 831, and are assembled as a whole with the magnetic circuit system 833.

[0161] When the four corners of the magnet 8331 are respectively fixed on the four supporting sub-parts 83432c2 corresponding to the protrusion 83114, a certain distance is created between the magnet 8331 and the first surface 83111. The existence of this distance can not only meet the vibration requirement of the movable part 83243, but also form a ventilation gap between the magnet 8331 and the first surface 83111 for ventilation with the rear cavity Q2.

[0162] Please continue to see Fig. 20 Exemplarily, the ventilation gap, for example, includes a first ventilation gap S1 formed between the first surface 83111 of one of the first appearance sub-portions 83115, the magnetic steel 8331 and two of the protrusions 83114 therein, and also includes a first ventilation gap S1 formed between the first surface 83111 of another first appearance sub-portion 83115, the magnetic steel 8331 and the other two protrusions 83114, and also includes the first surface 83111 of the second appearance sub-portion 83116, the magnetic steel 8331, one of the edge magnets 83322 and two of the protrusions 83114 therein, and also includes the first surface 83111 of the second appearance sub-portion 83116, the magnetic steel 8331, the other edge magnet 83322 and two of the protrusions 83114 formed between the two second ventilation gaps S2.

[0163] The first part 83432a of one of the ventilation parts 83432 blocks one of the first ventilation gaps S1, and the two second parts 83432b of the ventilation part 83432 respectively block the first surface 83111 of the second appearance sub-part 83116, the magnetic steel 8331, one of the edge magnets 83322 and a second ventilation gap S2 formed between two of the protrusions 83114, and the first surface 83111 of the second appearance sub-part 83116, the magnetic steel 8331, another edge magnet 83322 and a second ventilation gap S2 formed between the other two protrusions 83114.

[0164] The first part 83432a of the other ventilation portion 83432 blocks the other first ventilation gap S1, and the two second parts 83432b of the ventilation portion 83432 respectively block the first surface 83111 of the second appearance sub-portion 83116, the magnetic steel 8331, one of the edge magnets 83322 and another second ventilation gap S2 formed between the two protrusions 83114 therein, and the first surface 83111 of the second appearance sub-portion 83116, the magnetic steel 8331, another edge magnet 83322 and another second ventilation gap S2 formed between the other two protrusions 83114 therein.

[0165] This arrangement makes the ventilation section 83432 simple in structure and small in size.

[0166] Optionally, the ventilation portion 83432 is perpendicular to the first surface.

[0167] This arrangement ensures the shielding effect of the ventilation section 83432 and makes the area of ​​the ventilation section 83432 smaller.

[0168] In addition, the side wall of the magnet 8331 connecting the outer surface 83311 and the inner surface 83312 of the magnet 8331 is in contact with the inner surface 83432 f of the ventilation portion 83432 .

[0169] It is understandable that in order to clearly show the connection relationship between the partition unit 83432 and the bracket 831, Fig. 20 The magnets are not shown.

[0170] Of course, the assembly method is not limited to the above example. For example, the ventilation part 83432 and the magnetic steel 8331 can be welded together through the supporting sub-part 83432c2 of the ventilation part 83432 to form an integral structure, and then the integral structure can be fixed on the platform 83114a through the fixed sub-part 83432c1 of the ventilation part 83432 to realize the overall assembly with the magnetic circuit system 833.

[0171] To further increase ventilation, see Fig. 20Along the Z-axis direction, the portion of the first portion 83432a that does not overlap with the orthographic projection of the connecting portion 83244 of the signal receiving unit 83241 on the plane formed by the X-axis and the Y-axis in the orthographic projection on the plane formed by the X-axis and the Y-axis extends to the gap 83245 between the first fixed portion 83242 and the movable portion 83243 of the signal receiving unit 83241, for example, may contact the supporting portion 8312 of the bracket 831 to increase the area of ​​the first portion 83432a, and thereby increase the total area of ​​the ventilation holes 83421 opened on the first portion 83432a, thereby increasing the ventilation volume, that is, making full use of the gap 83245 between the first fixed portion 83242 and the movable portion 83243 of the signal receiving unit 83241, thereby avoiding waste of the gap 83245.

[0172] In this case, please continue to see Fig. 20 , the extension direction of the ventilation hole 83421 on the portion of the first portion 83432a that overlaps with the orthographic projection of the connecting portion 83244 of the signal receiving unit 83241 on the plane composed of the X-axis and the Y-axis in the orthographic projection on the plane composed of the X-axis and the Y-axis is different from the extension direction of the ventilation hole 83421 on the portion of the first portion 83432a that does not overlap with the orthographic projection of the connecting portion 83244 of the signal receiving unit 83241 on the plane composed of the X-axis and the Y-axis in the orthographic projection on the plane composed of the X-axis and the Y-axis, exemplary The ventilation holes 83421 on the portion of the first portion 83432a that does not overlap with the orthographic projection of the connection portion 83244 of the signal receiving unit 83241 on the plane composed of the X-axis and the Y-axis in the orthographic projection on the plane composed of the X-axis and the Y-axis extend in the Z-axis direction, and the ventilation holes 83421 on the portion of the first portion 83432a that overlaps with the orthographic projection of the connection portion 83244 of the signal receiving unit 83241 on the plane composed of the X-axis and the Y-axis in the orthographic projection on the plane composed of the X-axis and the Y-axis extend in the Y-axis direction. This arrangement facilitates the processing of the ventilation portion 83432 and makes the stress distribution of the ventilation portion 83432 more uniform.

[0173] To further increase ventilation, see Fig.14 Along the Z-axis direction, the outer surface 83311 of the magnetic steel 8331 is flush with the upper surface 83432d of the ventilation portion 83432 to increase the area of ​​the first portion 83432a, thereby increasing the total area of ​​the ventilation holes 83421 opened on the first portion 83432a and increasing the ventilation volume.

[0174] As can be seen from the above, when forming the speaker module 80, the rear shell 822 is not only assembled with the front shell 821, but also assembled with the core 83. Fig.14In order to facilitate the assembly of the rear shell 822 and the core 83, an annular step 83315 is left at the edge of the magnetic steel 8331. In the process of forming the speaker module 80, the rear shell 822 can be overlapped on the annular step 83315 to minimize the thickness of the speaker module 80.

[0175] In addition, in order to avoid the vibration of the movable part 83243, a space is reserved for the vibration of the movable part 83243, see Fig.21 and Fig. 22 , Fig.21 for Fig.14 The back structure diagram of the magnetic steel in the core is shown. Fig. 22 for Fig.21 The cross-section of the magnetic steel along the EE' direction is shown in FIG. Fig.21 and Fig. 22 As shown, a groove 83316 is provided on the inner surface 83312 of the magnetic steel 8331, and the orthographic projection of the groove 83316 on the plane formed by the X-axis and the Y-axis overlaps with the orthographic projection of the movable part 83243 on the plane formed by the X-axis and the Y-axis, and when there are multiple grooves 83316, the multiple grooves 83316 are interconnected. For example, the shape formed by the orthographic projection of the multiple interconnected grooves 83316 on the plane formed by the X-axis and the Y-axis is, for example, a "well" shape. That is to say, since the thickness of the magnetic steel 8331 in the embodiment of the present application is relatively thick, only the groove 83316 (which does not pass through the outer surface 83311 and the inner surface 83312 of the magnetic steel 8331) is provided to meet the vibration requirement of the movable part 83243, and there is no need to provide a hollow part (which passes through the outer surface 83311 and the inner surface 83312 of the magnetic steel 8331). This can ensure the integrity of the magnetic steel 8331, increase the magnetic field strength in the magnetic gap 83323, and improve the driving strength of the diaphragm system 832.

[0176] In the embodiment of the present application, the partition unit 8343 of the partition structure 834 only includes a ventilation portion 83432, and a long strip ventilation hole 83421 is provided on the ventilation portion 83432. The ventilation volume of the core 83 and the rear cavity Q2 is ensured by the ventilation portion 83432, and the powdered acoustic enhancement material can be prevented from entering the core cavity of the core 83 through the ventilation channel and the hollow portion 83313 to affect the vibration of the diaphragm system, etc. In addition, since the ventilation hole 83421 is in a long strip shape, the opening rate is increased, and the ventilation volume is ensured to be large. In this way, the height of the ventilation portion 83432 in the Z-axis direction can be made small, which is conducive to the lightweight design of the core 83, and the thickness of the magnetic steel 8331 can be increased, thereby increasing the magnetic field strength in the magnetic gap 83323 and improving the driving strength of the diaphragm system 832. In addition, since the partition unit 8343 does not include the shielding portion 83431, that is, in the Z-axis direction, the shielding portion 83431 is not provided on the magnetic steel 8331, so that a layer of wall thickness and the gap between the shielding portion 83431 and the magnetic steel 8331 can be saved, and the thickness of the core 83 in the Z-axis direction can be further reduced. Since there is no need to set a step, the integrity of the magnetic steel can be better guaranteed, and the magnetic field strength in the magnetic gap 83323 is further increased, and the driving strength of the diaphragm system 832 is improved. In addition, the outer surface 83311 of the magnetic steel 8331 is flush with the upper surface 83432d of the ventilation portion 83432, so as to increase the area of ​​the first part 83432a, and then the total area of ​​the ventilation holes 83421 opened on the first part 83432a can be increased, thereby increasing the ventilation volume.

[0177] For another example, see Fig. 22 , Fig. 22 and Fig.23 As shown, Fig. 22 A schematic diagram of the structure of another kernel provided in an embodiment of the present application, Fig.23 for Fig. 22 The cross-section of the core along the DD' direction is shown. Fig.24 for Fig. 22 The schematic diagram of the partition structure in the kernel is shown in FIG. Fig. 22 , Fig.23 and Fig.24 As shown, different from the above example, the partition unit 8343 also includes a flange 83433 parallel to the plane formed by the X-axis and the Y-axis, that is, the end of the ventilation part 83432 (including the end of the upper surface 83432d) originally extending along the Z-axis direction is folded 90° toward the inner core cavity to form a flange 83433 parallel to the plane formed by the X-axis and the Y-axis. The ventilation part 83432 is fixedly connected to the magnetic steel 8331 through the flange 83433, wherein the fixed connection method is not limited in the embodiment of the present application, for example, it can be fixed to the inner surface 83312 of the magnetic steel 8331 by welding or glue waterproofing.

[0178] In the embodiment of the present application, while ensuring a large ventilation volume, the contact area between the magnetic steel 8331 and the ventilation part 83432 can also be increased, thereby ensuring the firmness of the fixed connection between the magnetic steel 8331 and the ventilation part 83432.

[0179] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An electronic device, characterized in that: The speaker module comprises a speaker core, and the speaker module has a containing cavity, and the speaker core divides the containing cavity into a front cavity and a rear cavity; the speaker core comprises: The bracket comprises an appearance portion, wherein along a first direction, the appearance portion comprises a first surface and a second surface opposite to each other, and further comprises an outer side wall and an inner side wall connecting the first surface and the second surface; a diaphragm system, the diaphragm system being located on a side of the second surface facing away from the first surface, the diaphragm system comprising a diaphragm group and a voice coil, the diaphragm group being fixed to a side of the bracket, and the voice coil being fixed to a side of the diaphragm group facing the bracket; A magnetic circuit system, comprising a magnetic steel and a magnet group, wherein the magnet group is located on a side of the bracket away from the diaphragm group, and the magnetic steel is located on a side of the magnet group away from the bracket, and the magnetic circuit system is used to drive the voice coil to move so that the diaphragm group produces sound; A ventilation gap is provided between the magnetic steel and the bracket to achieve ventilation of the diaphragm group and the rear cavity; A partition structure, comprising at least two partition units, each of which comprises a ventilation part, wherein the ventilation part comprises a first part, second parts located on both sides of the first part, and a middle part connecting the first part and the second part, the ventilation parts of at least two partition units shield the ventilation gap, and the first part and the second part are both provided with a plurality of ventilation holes, and the ventilation holes are communicated with the rear cavity; A raised portion is provided on the first surface, and the portion of the raised portion facing the inner wall is recessed along the first direction to form a platform; along the first direction, the middle portion includes a fixed sub-portion and a supporting sub-portion located on a side of the fixed sub-portion away from the diaphragm group, the fixed sub-portion is fixed to the platform so that the ventilation portion is fixedly connected to the bracket, and the magnetic steel is fixed to the supporting sub-portion; The first direction is a direction perpendicular to the plane where the magnetic steel is located.

2. The electronic device according to claim 1, characterized in that: The magnetic steel has a preset distance from the first surface, so that the ventilation gap is formed between the magnetic steel and the first surface; The ventilation portion is perpendicular to the first surface, and the ventilation portions of at least two of the partition units are arranged around at least a portion of the periphery of the magnetic steel and cover the ventilation gap.

3. The electronic device according to claim 1, characterized in that: Along the first direction, the ventilation portion includes an upper surface and a lower surface opposite to each other, the upper surface is located on a side of the lower surface away from the diaphragm group, and the ventilation portion also includes an inner surface and an outer surface connecting the upper surface and the lower surface; The side wall of the magnetic steel contacts the inner surface of the ventilation part.

4. The electronic device according to claim 3, characterized in that: Along the first direction, a surface of the magnetic steel facing away from the magnet group is flush with an upper surface of the ventilation portion.

5. The electronic device according to claim 1, characterized in that: The partition unit further includes a flange, which is a structure formed by bending the end of the ventilation portion away from the diaphragm group at a preset angle, and the magnetic steel is fixed on the side of the flange away from the diaphragm group.

6. The electronic device according to claim 5, characterized in that: The preset angle includes 90°.

7. The electronic device according to claim 1, characterized in that: The appearance portion includes two first appearance sub-portions and two second appearance sub-portions, wherein one first appearance sub-portion, one second appearance sub-portion, another first appearance sub-portion and another second appearance sub-portion are connected end to end in sequence; The protrusion is provided at the connection between the first appearance sub-part and the second appearance sub-part; The magnet group includes a central magnet and at least two edge magnets, wherein the edge magnets are arranged around the circumference of the central magnet, a magnetic gap is defined between the central magnet and the edge magnets, and one end of the voice coil extends into the magnetic gap; The ventilation gap includes a first ventilation gap formed between the first surface of the first appearance sub-portion, the magnetic steel and the protrusion, and a second ventilation gap formed between the first surface, the magnetic steel, the edge magnet and the protrusion; The first part of the partition unit blocks the first ventilation gap, and the second part of the partition unit blocks the second ventilation gap.

8. The electronic device according to any one of claims 1 to 7, characterized in that: The diaphragm system further comprises a signal receiving structure fixed to a side of the bracket away from the diaphragm group; The signal receiving structure comprises a first fixed portion and a movable portion which are spaced apart from each other, and further comprises a connecting portion connecting the first fixed portion and the movable portion, wherein the connecting portion is located in a gap between the first fixed portion and the movable portion; The portion of the first portion that does not overlap with the orthographic projection of the connecting portion on the reference plane in the orthographic projection on the reference plane extends to a gap between the first fixed portion and the movable portion; The reference plane is parallel to the plane where the magnetic steel is located.

9. The electronic device according to claim 8, characterized in that: An extension direction of the ventilation holes on a portion of the first portion that does not overlap with the orthographic projection of the connecting portion on the reference plane in the orthographic projection on the reference plane is different from an extension direction of the ventilation holes on a portion of the first portion that overlaps with the orthographic projection of the connecting portion on the reference plane in the orthographic projection on the reference plane.

10. The electronic device according to claim 1, characterized in that: The speaker module further includes a housing, the housing includes a front housing and a rear housing, a housing cavity is enclosed between the front housing and the rear housing, and the speaker core is disposed in the housing cavity to separate the housing cavity into the front cavity and the rear cavity; An annular step is left at the edge of the surface of the magnetic steel facing away from the magnet group; The rear housing is arranged on the annular step.

11. The electronic device according to claim 1, characterized in that: The bracket comprises an annular appearance portion and a support portion located in the annular appearance portion; The diaphragm system further comprises a signal receiving structure fixed to a side of the bracket away from the diaphragm group; The signal receiving structure comprises a first fixed portion and a movable portion which are spaced apart from each other; The movable portion is located on a side of the voice coil away from the diaphragm group, so that the signal receiving structure and the voice coil are electrically connected; A groove is provided on the surface of the magnetic steel facing the magnet group, and the orthographic projection of the groove on the reference plane overlaps with the orthographic projection of the movable part on the reference plane; The reference plane is parallel to the plane where the magnetic steel is located.

12. The electronic device according to claim 1, characterized in that: The multiple ventilation holes of the first part are arranged from the first edge to the second edge, and both ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively; or, the multiple ventilation holes of the first part are arranged from the third edge to the fourth edge, and both ends of the ventilation holes of the first part extend to the first edge and the second edge respectively; wherein, the first edge is an edge of the first part adjacent to one of the second parts, the second edge is an edge of the first part adjacent to another of the second parts, and along the first direction, in the first part, the third edge is located on the side of the fourth edge away from the diaphragm group; The multiple ventilation holes of the second part are arranged from the fifth edge to the sixth edge, and the two ends of the ventilation holes of the second part extend to the seventh edge and the eighth edge respectively; or, the multiple ventilation holes of the second part are arranged from the seventh edge to the eighth edge, and the two ends of the ventilation holes of the first part extend to the fifth edge and the sixth edge respectively; wherein the fifth edge is an edge of the second part adjacent to the first part, and the sixth edge is an edge of the second part away from the first part, and along the first direction, in the second part, the seventh edge is located on the side of the eighth edge away from the diaphragm group.

13. The electronic device according to claim 12, characterized in that: The distance between two adjacent ventilation holes satisfies: (1 / 4) W2≤W1≤2W2, wherein W1 is the distance between two adjacent ventilation holes, and W2 is the width of the ventilation hole; When both ends of the ventilation holes of the first part extend to the first edge and the second edge respectively, the width of the ventilation holes is the size of the ventilation holes along the first direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the first direction; When both ends of the ventilation holes of the first part extend to the third edge and the fourth edge respectively, the width of the ventilation holes is the size of the ventilation holes along the second direction, the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the second direction, and the second direction is the direction from the first edge to the second edge; When both ends of the ventilation hole of the second part extend to the fifth edge and the sixth edge respectively, the width of the ventilation hole is the size of the ventilation hole along the first direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the first direction; When the two ends of the ventilation holes of the second part extend to the seventh edge and the eighth edge respectively, the width of the ventilation holes is the size of the ventilation holes along the second direction, and the spacing between two adjacent ventilation holes is the distance between the two ventilation holes along the second direction, and the second direction is the direction from the fifth edge to the sixth edge.

14. The electronic device according to claim 12, characterized in that: The length of the ventilation hole of the first part satisfies: (2 / 5) L2≤L1≤(9 / 10)L2, wherein L1 is the length of the ventilation hole of the first part, and L2 is the length of the first part; when the two ends of the ventilation hole of the first part extend to the first edge and the second edge respectively, the length of the ventilation hole is the size of the ventilation hole along the second direction, and the length of the first part is the size of the first part along the second direction, and the second direction is the direction from the first edge to the second edge; when the two ends of the ventilation hole of the first part extend to the third edge and the fourth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the first direction, and the length of the first part is the size of the first part along the first direction; and / or, The length of the ventilation hole of the second part satisfies: (2 / 5) L3≤L4≤(9 / 10)L3, wherein L4 is the length of the ventilation hole of the second part, and L3 is the length of the second part; when the two ends of the ventilation hole of the second part extend to the fifth edge and the sixth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the third direction, and the length of the second part is the size of the second part along the third direction, and the third direction is the direction from the fifth edge to the sixth edge; when the two ends of the ventilation hole of the second part extend to the seventh edge and the eighth edge respectively, the length of the ventilation hole is the size of the ventilation hole along the first direction, and the length of the second part is the size of the second part along the first direction.

15. The electronic device according to claim 1, characterized in that: The cross-sectional shapes of the ventilation holes include rectangular, elliptical, "S"-shaped, square, and circular.

16. The electronic device according to claim 1, characterized in that: The electronic device further comprises a middle frame, and a sound outlet hole is provided on the middle frame; The speaker module has a sound outlet channel, and the sound outlet channel communicates with the front cavity and the sound outlet hole.

17. A speaker core, characterized in that: include: The bracket comprises an appearance portion, wherein along a first direction, the appearance portion comprises a first surface and a second surface opposite to each other, and further comprises an outer side wall and an inner side wall connecting the first surface and the second surface; a diaphragm system, the diaphragm system being located on a side of the second surface facing away from the first surface, the diaphragm system comprising a diaphragm group and a voice coil, the diaphragm group being fixed to a side of the bracket, and the voice coil being fixed to a side of the diaphragm group facing the bracket; A magnetic circuit system, comprising a magnetic steel and a magnet group, wherein the magnet group is located on a side of the bracket away from the diaphragm group, and the magnetic steel is located on a side of the magnet group away from the bracket, and the magnetic circuit system is used to drive the voice coil to move so that the diaphragm group produces sound; There is a ventilation gap between the magnetic steel and the bracket; A partition structure, comprising at least two partition units, each of which comprises a ventilation part, wherein the ventilation part comprises a first part, second parts located on both sides of the first part, and a middle part connecting the first part and the second part, the ventilation parts of at least two of the partition units shield the ventilation gap, and a plurality of ventilation holes are provided on the first part and the second part; A raised portion is provided on the first surface, and the portion of the raised portion facing the inner wall is recessed along the first direction to form a platform; along the first direction, the middle portion includes a fixed sub-portion and a supporting sub-portion located on a side of the fixed sub-portion away from the diaphragm group, the fixed sub-portion is fixed to the platform so that the ventilation portion is fixedly connected to the bracket, and the magnetic steel is fixed to the supporting sub-portion; The first direction is a direction perpendicular to the plane where the magnetic steel is located.

18. A speaker module, characterized in that: comprising a shell and a core, wherein the core is the speaker core according to claim 17; The speaker core is located in the shell, and divides the accommodating cavity in the shell into a front cavity and a rear cavity; The ventilation hole is communicated with the rear cavity, so as to realize ventilation between the diaphragm group and the rear cavity.

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