Loudspeaker and electronic equipment

Abstract

The invention relates to the technical field of terminal equipment, and discloses a loudspeaker and electronic equipment. The loudspeaker comprises a frame, a magnetic circuit system and a vibration system, the magnetic circuit system and the vibration system are connected with the frame, and the magnetic circuit system is fixed at one end of the frame. The vibration system comprises a vibrating diaphragm, a dome and a voice coil. One end of the vibrating diaphragm is fixed at the other end of the basin frame, and the vibrating diaphragm protrudes towards the direction of the basin frame; the globe roof comprises a first globe roof and a second globe roof, the first globe roof is located on the side, away from the basin stand, of the vibrating diaphragm, the second globe roof is annularly arranged on the first surface of the first globe roof, and the second globe roof is connected with the other end of the vibrating diaphragm; the voice coil is fixed on the first surface of the first dome and is opposite to the magnetic circuit system; the voice coil is configured to generate a magnetic field effect with the magnetic circuit system to drive the first dome to vibrate and produce sound. Therefore, the dome is divided into two parts, and the diaphragm is used for transversely supporting the dome, so that the shape of the dome can be maximized, the area of the first dome can be increased, the effective sound radiation area of the loudspeaker can be increased, and the loudness of the loudspeaker can be increased.

Description

Technical Field

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

[0002] With the popularity of electronic devices (such as smartphones, tablets, smart wearable devices, etc.), their audio performance has become one of the core indicators of user experience. At present, electronic devices generally have built-in micro speakers as the core components of acoustic output. The reciprocating vibration of the diaphragm drives the air to generate sound waves, thereby realizing functions such as sound playback and calls.

[0003] The core structure of a loudspeaker includes components such as the diaphragm, voice coil, magnetic circuit system, and basin frame. Among them, the diaphragm is a sound radiation component that directly drives the air to vibrate, and its effective sound radiation area is a key parameter that determines the loudness and frequency response characteristics of the sound. The effective sound radiation area refers to the effective area of ​​the diaphragm that actually participates in the radiation of sound waves during the vibration process, and its value is jointly determined by the geometric shape of the diaphragm, the stiffness of the material, and the boundary fixing conditions.

[0004] In the speaker assembly process, the edge of the diaphragm needs to be fixed to the basin frame by adhesive, and in order to ensure structural stability, the bonding width is relatively large. This will cause the effective vibration area of ​​the diaphragm to shrink toward the center, thereby reducing the effective sound radiation area and causing the speaker to be insufficiently loud. Summary of the invention

[0005] The present application provides a loudspeaker and an electronic device to solve the problem that the effective sound radiation area of ​​the existing loudspeaker is small, resulting in insufficient sound loudness.

[0006] In the first aspect, the present application provides a loudspeaker, comprising: a basin frame, and a magnetic circuit system and a vibration system connected to the basin frame, wherein the magnetic circuit system is fixed to one end of the basin frame; the vibration system comprises: a diaphragm, a dome and a voice coil. One end of the diaphragm is fixed to the other end of the basin frame, and the diaphragm protrudes toward the direction of the basin frame; the dome comprises a first dome and a second dome, wherein the first dome is located on the side of the diaphragm away from the basin frame, and the second dome is arranged around the first surface of the first dome, and the second dome is connected to the other end of the diaphragm; wherein the first surface faces the diaphragm; the voice coil is fixed to the first surface of the first dome and is opposite to the magnetic circuit system; the voice coil is configured to generate a magnetic field with the magnetic circuit system to drive the first dome to vibrate and produce sound.

[0007] The loudspeaker provided by the embodiment of the present application, the dome includes a first dome and a second dome. The first dome is connected to one end of the diaphragm through the second dome, and the other end of the diaphragm is connected to the chassis. The first dome is bonded to the voice coil and vibrates and emits sound under the drive of the voice coil. In this way, the dome is located above the diaphragm, and the diaphragm is used to laterally support the dome, which can maximize the shape of the dome. The dome is divided into two parts, the middle first dome and the second dome with an outer edge ring. This can not only improve the reliability of the dome, but also increase the area of the first dome for vibrating and emitting sound. Moreover, the bonding width between the diaphragm and the chassis does not affect the area of the first dome, so as to increase the effective vibration area of the first dome, and further increase the effective sound radiation area of the loudspeaker to increase the external loudness of the loudspeaker.

[0008] In some implementation manners, the magnetic circuit system includes a magnetic conductive plate, a main magnetic member and a plurality of sub-magnetic members; the magnetic conductive plate is fixed to one end of the chassis; the main magnetic member and the plurality of sub-magnetic members are fixed on the magnetic conductive plate and are located in the receiving space of the chassis; the plurality of sub-magnetic members are arranged around the main magnetic member, and there is a magnetic gap between each sub-magnetic member and the main magnetic member; a part of the voice coil is suspended in the magnetic gap. In this way, the magnetic field strength at the magnetic gap is the highest, which is convenient for the voice coil to move under the strong magnetic field action at the magnetic gap, and then drive the dome to generate large-amplitude vibration to improve the sound volume of the loudspeaker.

[0009] In some implementation manners, the diaphragm includes a surround portion, a first fixing portion located inside the surround portion, and a second fixing portion located outside the surround portion; the surround portion protrudes towards the direction where the magnetic conductive plate is located, and there is a vibration gap between the surround portion and the magnetic conductive plate. In this way, the diaphragm can be used to laterally support the dome, and the vibration gap can be used to provide a vibration space for the up-and-down vibration of the surround portion.

[0010] In some implementation manners, the first fixing portion is fixed to the other end of the chassis; the surround portion and the second fixing portion are located outside the chassis; the second fixing portion is connected to the second dome. In this way, the diaphragm is fixed to the outside of the chassis, and the dome is fixed to the second fixing portion of the diaphragm by a snap connection. The surround portion of the diaphragm is retracted under the dome, and the diaphragm laterally supports the dome, which can keep the dome centered, limit the lateral displacement of the dome, and provide an elastic restoring force to ensure the linear movement of the dome in the up-and-down direction.

[0011] In some implementation manners, the second fixing portion includes a support portion and a resisting portion; one end of the support portion is connected to the surround portion, and the other end extends in a direction away from the surround portion; the resisting portion is located on the surface of the support portion facing the first dome and is retracted a first distance relative to the other end of the support portion. In this way, a snap connection space can be formed between the outside of the resisting portion and the support portion, and the outside of the diaphragm is connected to the edge of the second dome, which can improve the reliability between the diaphragm and the dome.

[0012] In some implementations, the second dome is connected to the four peripheral edges of the first dome; the second dome covers the outside of the resisting portion and abuts against the supporting portion. In this way, a structural form of the dome can be provided. The dome is formed by two parts, which can not only improve the stability of the dome but also realize the reciprocating movement up and down.

[0013] In some implementations, the effective sound radiation area of the speaker includes the area of the region surrounded by the position of the first dome opposite to the first position of the first fixing portion; the first position is the position where the first fixing portion is opposite to the outer surface of the chassis. In this way, the effective sound radiation area of the speaker can be increased.

[0014] In some implementations, it further includes: a first sealing ring; the first sealing ring is sleeved on the outside of the chassis and abuts against the diaphragm and the magnetic conduction plate respectively to seal the vibration gap. In this way, the first sealing ring can be used to seal the vibration gap between the diaphragm and the magnetic conduction plate, completely isolate the sound wave path between the back of the diaphragm and the front sound cavity, avoid the phase cancellation of the sound wave escaping downward behind the diaphragm and the sound wave going upward in the front direction, thereby reducing the sound energy loss and increasing the effective sound radiation area.

[0015] In some implementations, the magnetic conduction plate includes a plurality of first air vents; the plurality of first air vents are opposite to the first sealing ring, and the first air vents are used for the air flow generated by the vibration of the diaphragm to flow out to the external environment. In this way, when the diaphragm vibrates, through the air flow exchange of the first air vents, the air behind the diaphragm can be conducted to the external environment, which can balance the air pressure fluctuation during the vibration of the diaphragm, avoid the enhancement of the air spring rigidity caused by complete sealing, and reduce the air spring effect.

[0016] In some implementations, the chassis includes a plurality of first ventilation holes; the first ventilation holes are opposite to the first sealing ring, and the first ventilation holes communicate the vibration gap of the diaphragm and the rear sound cavity of the speaker; wherein, the rear sound cavity is surrounded by the dome, the diaphragm, the chassis and the magnetic circuit system. In this way, the first ventilation holes can be used to direct the sound wave behind the diaphragm to the rear sound cavity instead of leaking irregularly. This can not only avoid air flow disturbance and avoid affecting the effective sound radiation area, but also reduce the turbulent noise to improve the volume clarity.

[0017] In some implementations, the second fixing portion is fixed to the other end of the chassis and has a vibration gap with the first dome; the folding ring portion and the first fixing portion are located inside the chassis; the first fixing portion is connected to the second dome. In this way, the diaphragm is located in the receiving space of the chassis, so that the sound wave behind the diaphragm is directly communicated with the rear sound cavity of the speaker, which can avoid the sound wave generated by the diaphragm flowing forward to the front sound cavity and canceling the sound wave in the front sound cavity in phase, thereby reducing the sound energy loss, and further increasing the effective sound radiation area and the sound pressure level to improve the external volume loudness.

[0018] In some implementations, the second dome is recessed from the edge of the first dome by a second distance; the chassis is opposite to the edge of the first dome. In this way, another structural form of the dome can be provided. The dome is formed by two parts, which can not only improve the stability of the dome, but also realize the reciprocating motion up and down.

[0019] In some implementations, the second dome includes a plurality of second vent holes; the plurality of second vent holes communicate with the rear sound cavity of the speaker, and the second vent holes are used for the airflow generated when the diaphragm vibrates to flow out into the rear sound cavity; wherein, the rear sound cavity is surrounded by the dome, the diaphragm, the chassis and the magnetic circuit system. In this way, the second vent holes can be used as a sound wave diversion channel for the airflow generated when the diaphragm vibrates to flow out into the rear sound cavity to conduct with the external environment, thereby balancing the air pressure fluctuation when the diaphragm vibrates.

[0020] In some implementations, it further includes: a second sealing ring; the second sealing ring is sleeved on the outside of the second dome and abuts against the diaphragm and the first dome respectively to seal the vibration gap. In this way, the second sealing ring can seal the vibration gap between the diaphragm and the first dome, isolate the air flow between the diaphragm and the first dome, and force the air pushed by the diaphragm when vibrating to enter the rear sound cavity through the second vent holes, so as to avoid the phase cancellation of the sound wave generated by the diaphragm and the sound wave in the forward direction, thereby reducing the sound energy loss, increasing the effective sound radiation area and the low-frequency sound pressure level, and improving the sound loudness.

[0021] In some implementations, the effective sound radiation area of the speaker includes the surface area of the first dome. In this way, the effective sound radiation area of the speaker can be increased.

[0022] In some implementations, it further includes: a housing; the housing covers the outside of the chassis, the magnetic circuit system and the vibration system and is fixed to the magnetic conductive plate in the magnetic circuit system; the housing and the second surface of the first dome enclose the front sound cavity of the speaker, and the second surface is opposite to the first surface. In this way, the housing can be used to protect the internal structure of the speaker, and can also enclose the front sound cavity to make the sound wave diffuse in a specific direction.

[0023] In some implementations, the housing includes a sound outlet; the sound outlet is located on the side wall of the housing and communicates with the front sound cavity. In this way, the sound wave generated by the vibration of the first dome can be diffused from the side surface of the speaker to realize side sound output.

[0024] In a second aspect, the present application provides an electronic device, including a display screen, a middle frame, a rear shell, and a speaker as provided in the first aspect; the display screen and the rear shell are located on opposite sides of the middle frame and are connected to the middle frame to enclose the whole machine cavity; the middle frame includes a sound outlet; the speaker is located in the whole machine cavity, and the sound outlet of the speaker communicates with the sound outlet.

[0025] The electronic device provided by the embodiment of the present application uses a speaker with a high effective sound radiation area, which can improve the external volume of the speaker, and thus improve the external volume of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic structural diagram of the electronic device provided by the embodiment of the present application; Figure 2 is a schematic structural diagram of a speaker assembly; Figure 3 is Figure 2 the schematic structural diagram of the A-A cross-section in Figure 4 is the first exploded structural diagram of the speaker provided by the embodiment of the present application; Figure 5 is the first structural diagram of the speaker provided by the embodiment of the present application; Figure 6 is Figure 5 the schematic structural diagram of the B-B cross-section in Figure 7 is the first top view structural diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application; Figure 8 is the first structural diagram of the diaphragm provided by the embodiment of the present application; Figure 9 is the first structural diagram of the dome provided by the embodiment of the present application; Figure 10 is the first partial structural diagram of the connection between the dome and the diaphragm provided by the embodiment of the present application; Figure 11 is the structural diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application; Figure 12 is the schematic diagram of the effective sound radiation area of the speaker provided by the embodiment of the present application; Figure 13 is the second structural diagram of the speaker provided by the embodiment of the present application; Figure 14 is Figure 13 the schematic structural diagram of the C-C cross-section in Figure 15 is the second exploded structural diagram of the speaker provided by the embodiment of the present application; Figure 16It is the third structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 17 It is Figure 16 the structural schematic diagram of the D-D cross-section in Figure 18 It is the second top-down structural schematic diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application; Figure 19 It is the structural schematic diagram of the chassis provided by the embodiment of the present application; Figure 20 It is Figure 16 the structural schematic diagram of the E-E cross-section in Figure 21 It is the fourth structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 22 It is Figure 21 the structural schematic diagram of the F-F cross-section in Figure 23 It is the third exploded structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 24 It is the second structural schematic diagram of the diaphragm provided by the embodiment of the present application; Figure 25 It is the fifth structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 26 It is Figure 25 the structural schematic diagram of the G-G cross-section in Figure 27 It is the second structural schematic diagram of the dome provided by the embodiment of the present application; Figure 28 It is the second partial structural schematic diagram of the connection between the dome and the diaphragm provided by the embodiment of the present application; Figure 29 It is the sixth structural schematic diagram of the loudspeaker provided by the embodiment of the present application.

[0028] Illustration: 10 - Display screen, 20 - Middle frame, 21 - Sound outlet hole, 30 - Loudspeaker assembly, 31 - Chassis structure, 32 - Diaphragm structure, 321 - Folded edge area, 33 - Dome structure, 34 - Voice coil structure, 35 - Permanent magnet, 351 - Central permanent magnet, 352 - Edge permanent magnet, 36 - Central washer, 37 - Edge washer, 38 - Lower washer; 100 - Chassis, 101 - First ventilation hole; 200 - Magnetic circuit system, 201 - Magnetic conductive plate, 2011 - First air vent hole, 2012 - Second air vent hole, 202 - Main magnetic member, 2021 - Main permanent magnet, 2022 - Main magnetic conductive ring, 203 - Sub-magnetic member, 2031 - Sub-permanent magnet, 2032 - Sub-magnetic conductive ring; 300 - Vibration system, 301 - Diaphragm, 3011 - Folded ring part, 3012 - First fixing part, 3013 - Second fixing part, 30131 - Support part, 30132 - Resistance part, 302 - Dome, 3021 - First dome, 3021a - First surface, 3021b - Second surface, 3022 - Second dome, 3023 - Second ventilation hole, 303 - Voice coil; 401 - First sealing ring, 402 - Second sealing ring; 500 - Housing, 501 - Sound outlet. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] In the description of the present application, terms such as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0031] In addition, in the present application, orientation terms such as "upper" and "lower" are defined relative to the orientation of the components shown in the accompanying drawings. It should be understood that these directional terms are relative concepts, and they are used for relative description and clarification, and they may change accordingly with the change of the orientation of the components placed in the accompanying drawings.

[0032] The electronic device described in the embodiments of the present application includes, but is not limited to, mobile phones, laptop computers, tablet computers, laptop computers, personal digital assistants, or wearable devices, etc. Hereinafter, a mobile phone is used as an example for illustration.

[0033] Figure 1 It is a schematic structural diagram of the electronic device provided by the embodiments of the present application.

[0034] As Figure 1 shown, the electronic device may include a display screen 10, a middle frame 20, and a rear shell. The display screen 10 and the rear shell are located on opposite sides of the middle frame 20. The display screen 10, the middle frame 20, and the rear shell are sequentially buckled together to form a whole-machine cavity. Among them, the whole-machine cavity includes components such as a communication module, a circuit board, a battery, a speaker assembly, and a camera assembly, which are not listed one by one here.

[0035] A speaker assembly, commonly known as a loudspeaker, is a transducer device that converts electrical signals into sound waves. As the core component for acoustic output, the speaker assembly enables an electronic device to have audio performance, thereby enhancing the user experience. The speaker assembly can be an in-built micro speaker that generates sound waves by the reciprocating vibration of the diaphragm to achieve functions such as sound playback and calls. An acoustic outlet hole 21 is provided on the middle frame 20 for diffusing the sound output by the speaker assembly.

[0036] To facilitate the description of the positions of the various components in the electronic device, a three-dimensional coordinate system is exemplarily established for the electronic device in the embodiments of the present application. Among them, the x-axis direction is the width direction of the electronic device, the y-axis direction is the length direction of the electronic device, and the z-axis direction is the thickness direction of the electronic device.

[0037] Figure 2 is a schematic structural diagram of a speaker assembly; Figure 3 is Figure 2 a schematic structural diagram of the cross-section A-A in

[0038] As Figure 2 and Figure 3 shown, the core structure of the speaker assembly 30 can be divided into three major parts: a chassis structure 31, a vibration system, and a magnetic circuit system, supplemented by other auxiliary structures. The vibration system includes a diaphragm structure 32, a dome structure 33, a voice coil structure 34, etc. The magnetic circuit system includes a permanent magnet 35, a center washer 36, side washers 37, and a lower washer 38, etc.

[0039] The permanent magnet 35 is fixed above the lower washer 38. The permanent magnet 35 includes a center permanent magnet 351 and a plurality of side permanent magnets 352. The plurality of side permanent magnets 352 surround the center permanent magnet 351, and there is a magnetic gap L0 between each side permanent magnet 352 and the center permanent magnet 351. The center washer 36 is disposed above the center permanent magnet 351. There are a plurality of side washers 37, and they are correspondingly disposed above the plurality of side permanent magnets 352 one by one. The chassis structure 31 is fixedly connected above the side permanent magnets 352, and the side washers 37 are fixed to the chassis structure 31. The diaphragm structure 32 covers the chassis structure 31 and is bonded to the chassis structure 31. The dome structure 33 is disposed in the central region of the diaphragm structure 32, so that a surround area 321 is formed between the diaphragm structure 32 and the dome structure 33. The voice coil structure 34 is fixed to the lower surface of the diaphragm structure 32 and is suspended above the magnetic gap L0.

[0040] It should be noted that the dome structure 33 can be a form of the diaphragm. The dome structure 33 and the diaphragm structure 32 can be collectively referred to as the diaphragm.

[0041] The chassis structure 31 is used to support the skeleton of the entire speaker assembly 30, ensuring the precise alignment of each component and providing mechanical stability at the same time. The diaphragm structure 32 is used to directly push the air to generate sound waves. The dome structure 33 is used to efficiently convert the mechanical vibration of the voice coil structure 34 into high-frequency sound waves and optimize the sound field diffusion characteristics. The voice coil structure 34 is used to generate an alternating magnetic field after being energized, interact with the magnetic circuit system, and drive the diaphragm structure 32 to vibrate. The permanent magnet 35 (the central permanent magnet 351 and the edge permanent magnet 352) is used to provide a constant magnetic field, and interact with the alternating magnetic field of the voice coil structure 34 to generate a driving force. The central washer 36 is a magnetic conduction core, which is used to converge the magnetic flux of the permanent magnet 35 to the magnetic gap L0. The edge washer 37 is an outer magnetic conduction component, which cooperates with the central washer 36 to form a closed magnetic circuit and enhance the magnetic field strength of the magnetic gap L0. The lower washer 38 is a magnetic conduction plate at the bottom of the magnetic circuit, and together with the central washer 36 and the edge washer 37, it constitutes a magnetic circuit.

[0042] Other auxiliary structures include a dust cap, a terminal and a phase plug, etc., and the corresponding structures are not shown in the figure. Among them, the dust cap is used to cover the center of the diaphragm structure 32 to prevent foreign objects from entering the magnetic gap L0. The terminal is a metal contact welded on the chassis structure 31, which connects the lead of the voice coil structure 34 with the external circuit. The phase plug is used to optimize the sound wave propagation path and reduce high-frequency distortion.

[0043] The sound generation principle (electrical-mechanical-acoustic conversion process) of the speaker assembly 30 includes: (1) Magnetic field establishment: The central permanent magnet 351 forms a closed magnetic circuit through the central washer 36, the edge washer 37 and the lower washer 38, and the magnetic field strength is the highest at the magnetic gap L0 (the position where the voice coil structure 34 is located). (2) Electrical signal input: The audio current passes through the voice coil structure 34 to generate an alternating magnetic field. (3) Lorentz force drive: The magnetic field of the voice coil structure 34 interacts with the magnetic field of the permanent magnet 35 to generate an axial force according to Fleming's left-hand rule. (4) Vibration transmission: The voice coil structure 34 drives the diaphragm structure 32 to move up and down, and the diaphragm structure 32 pushes the air to form a density wave (sound wave).

[0044] As the sound radiation component that directly drives the air to vibrate, the effective sound radiation area (Sd) of the diaphragm structure 32 is a key parameter that determines the sound loudness and frequency response characteristics of the speaker assembly 30. The effective sound radiation area (Sd) refers to the effective area where the diaphragm structure 32 actually participates in sound wave radiation during vibration, and its value is jointly determined by the geometric shape of the diaphragm structure 32, the material stiffness and the boundary fixing conditions, etc.

[0045] In theory, the larger the effective sound radiation area, the higher the efficiency of the diaphragm structure 32 in pushing air, and the sound pressure level (SPL) will increase accordingly. Especially in the low-frequency band, the fullness and dynamic range of the sound can be significantly improved. Among them, the sound pressure level represents the instantaneous pressure change (relative to the static pressure) generated when the sound wave propagates in the air, and the unit is decibel (dB). The sound pressure level is used to describe the magnitude of the sound pressure and quantify the loudness of the sound.

[0046] It can be understood that the larger the Sd of the diaphragm structure 32, the stronger the low-frequency response (for example, a woofer needs a large Sd), and the louder the sound; the smaller the Sd of the diaphragm structure 32, the weaker the low-frequency response, and the smaller the sound.

[0047] In the assembly process of the speaker assembly 30, the edge of the diaphragm structure 32 needs to be fixed to the chassis structure 31 through an adhesive. To ensure the structural stability, the bonding width W1 between the diaphragm structure 32 and the chassis structure 31 is W1≥0.4mm, and to ensure the waterproof requirement, the bonding width W1 needs to be W1≥0.5mm. However, an excessive bonding width W1 will limit the vibration freedom of the edge of the diaphragm structure 32, and the actual effective vibration area will shrink towards the center. Therefore, the wider the suspension edge of the diaphragm structure 32, the lower the Sd of the diaphragm structure 32. Among them, the suspension edge refers to the part of the diaphragm structure 32 bonded to the chassis structure 31.

[0048] At the same time, since the dome structure 33 is connected to the chassis structure 31 through the surround area 321, when vibrating up and down, the part of the surround area 321 connected to the dome structure 33 vibrates synchronously with the dome structure 33, while the part of the surround area 321 connected to the chassis structure 31 is pulled by the chassis structure 31 and does not vibrate, resulting in a loss of part of the vibration area. In this way, it will further cause the effective vibration area of the diaphragm structure 32 to shrink towards the center.

[0049] Therefore, the effective vibration area of the diaphragm structure 32 is the area surrounded by the middle part of the surround area 321, and the effective vibration area is smaller than the total area of the diaphragm structure 32. In this way, the effective sound radiation area Sd0 of the speaker assembly 30 is the area of the region surrounded by the middle part of the surround area 321, and the effective sound radiation area Sd0 is relatively low, which will result in insufficient sound loudness of the speaker assembly 30.

[0050] In addition, if the accuracy of the bonding process is insufficient, it may cause deformation or uneven stress distribution of the diaphragm structure 32, further weakening the acoustic performance. Therefore, how to maximize the effective sound radiation area on the premise of ensuring structural reliability to improve the speaker performance.

[0051] To solve the above technical problems, the embodiments of the present application provide a speaker, which changes the dome structure and the connection method between the diaphragm and the chassis to increase the effective sound radiation area of the speaker, thereby improving the external sound loudness of the speaker.

[0052] Figure 4 This is the first exploded view of the loudspeaker provided by the embodiments of the present application.

[0053] As Figure 4 shown, in some embodiments, a loudspeaker provided by the embodiments of the present application includes: a chassis 100, and a magnetic circuit system 200 and a vibration system 300 connected to the chassis 100.

[0054] The magnetic circuit system 200 may include a magnetic conductive plate 201, a main magnetic member 202, a sub-magnetic member 203, etc., and the vibration system 300 may include a diaphragm 301, a dome 302, a voice coil 303, etc.

[0055] The chassis 100 is used to support the framework of the entire loudspeaker, ensure the precise alignment of each component, and provide mechanical stability at the same time. The chassis 100 is usually made of metal (aluminum alloy, steel) or high-strength plastic and has an annular structure. The center of the chassis 100 has a receiving space (not shown in the figure) for installing the magnetic circuit system 200.

[0056] The diaphragm 301 is used to keep the dome 302 centered, can limit the lateral displacement of the dome 302, and provide an elastic restoring force. The materials of the diaphragm 301 include pulp, polypropylene, metal (aluminum, titanium), or composite materials, etc.

[0057] The dome 302 is used to directly push the air to generate sound waves. The dome 302 can efficiently convert the mechanical vibration of the voice coil 303 into high-frequency sound waves and optimize the sound field diffusion characteristics. The loudspeaker provided by the embodiments of the present application is responsible for vibrating and generating sound by the dome 302. The effective vibration area of the dome 302 determines the effective sound radiation area of the loudspeaker, and there is a positive correlation between the two. Among them, the effective vibration area refers to the area of the effective region that actually participates in sound wave radiation during the vibration of the dome 302.

[0058] The voice coil 303 is used to generate an alternating magnetic field after being energized, interact with the magnetic circuit system 200, and drive the dome 302 to vibrate and generate sound. The voice coil 303 is a coil wound with copper or aluminum wire on a high-temperature-resistant dome 302 and is suspended in the magnetic gap of the magnetic circuit system 200.

[0059] The main magnetic member 202 includes a main permanent magnet 2021 and a main magnetic conductive ring 2022. The main permanent magnet 2021 is used to provide a constant magnetic field and interact with the alternating magnetic field of the voice coil 303 to generate a driving force; the main magnetic conductive ring 2022 can be used as a center washer and is a magnetic conductive core. The main magnetic conductive ring 2022 is used to converge the magnetic flux of the main permanent magnet 2021 to the magnetic gap.

[0060] The auxiliary magnetic member 203 includes an auxiliary permanent magnet 2031 and an auxiliary magnetic conductive ring 2032. The auxiliary permanent magnet 2031 is used to provide a constant magnetic field, which interacts with the alternating magnetic field of the voice coil 303 to generate a driving force; the auxiliary magnetic conductive ring 2032 can serve as an outer washer and is an outer magnetic conductive component. The auxiliary magnetic conductive ring 2032 is used to cooperate with the main magnetic conductive ring 2022 to form a closed magnetic circuit and enhance the magnetic field strength of the magnetic gap.

[0061] It should be noted that both the main permanent magnet 2021 and the auxiliary permanent magnet 2031 are permanent magnets, which are located at the center or periphery of the magnetic circuit. The structure of the permanent magnet can be a block structure; the material can be neodymium iron boron (high performance), ferrite (economical), or alnico, etc.

[0062] The magnetic conductive plate 201 can serve as the lower washer at the bottom of the magnetic circuit system 200 and is used to jointly form a magnetic circuit with the main magnetic conductive ring 2022 of the main magnetic member 202 and the auxiliary magnetic conductive ring 2032 of the auxiliary magnetic member 203.

[0063] Figure 5 is the first structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 6 is Figure 5 the structural schematic diagram of the B-B cross-section in. Among them, Figure 5 in (a) and (b) show the structures of the loudspeaker from different perspectives, Figure 5 the structure of the dome 302 is not shown in (b).

[0064] As Figure 5 in (a), (b) and Figure 6 shown, in some embodiments, the magnetic circuit system 200 is fixed to one end of the chassis 100. Among them, the magnetic circuit system 200 may include a magnetic conductive plate 201, a main magnetic member 202, and a plurality of auxiliary magnetic members 203.

[0065] The magnetic conductive plate 201 is fixed to one end of the chassis 100; the main magnetic member 202 and the plurality of auxiliary magnetic members 203 are fixed on the magnetic conductive plate 201 and are located in the receiving space of the chassis 100.

[0066] Figure 7 is the first top view structural schematic diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application.

[0067] As Figure 7 shown, in some embodiments, a plurality of auxiliary magnetic members 203 are arranged around the main magnetic member 202, and the number of the plurality of auxiliary magnetic members 203 is the same as the number of the polygonal sides of the main magnetic member 202.

[0068] Exemplarily, the cross-section of the main magnetic member 202 is rectangular, and the number of the sub-magnetic members 203 is four. Two of the sub-magnetic members 203 are oppositely arranged on the long side of the main magnetic member 202, and the other two sub-magnetic members 203 are oppositely arranged on the short side of the main magnetic member 202. The length of the sub-magnetic member 203 is adapted to the long side or the short side of the main magnetic member 202.

[0069] Each sub-magnetic member 203 is arranged at an interval from the main magnetic member 202, and there is a magnetic gap L0 between each sub-magnetic member 203 and the main magnetic member 202 to ensure uniform magnetic field distribution. Exemplarily, the width of the magnetic gap L0 is about 0.5 mm - 2 mm. The smaller the magnetic gap L0 is, the more the magnetic field uniformity can be improved and the distortion can be reduced.

[0070] Figure 8 It is the first structural schematic diagram of the diaphragm provided by the embodiment of the present application. Among them, Figure 8 In (a), the surface structure of the diaphragm 301 facing away from the magnetic conductive plate 201 is shown, Figure 8 In (b), the surface structure of the diaphragm 301 facing the magnetic conductive plate 201 is shown, Figure 8 In (c), the side view structure of the diaphragm 301 is shown.

[0071] Combined with Figure 6 and Figure 8 As shown in (a), (b), and (c) therein, in some embodiments, the diaphragm 301 is fixed to the other end of the speaker frame 100, and the diaphragm 301 and the magnetic conductive plate 201 are fixed to the opposite ends of the speaker frame 100.

[0072] One end of the diaphragm 301 can be fixedly connected to the speaker frame 100 through an adhesive. The other end of the diaphragm 301 extends in a direction away from the speaker frame 100, and the other end of the diaphragm 301 is located outside the receiving space of the speaker frame 100.

[0073] The diaphragm 301 protrudes in the z-axis direction towards the speaker frame 100 to provide an elastic restoring force during vibration, driving the dome 302 to return to the initial position and realizing up and down vibration.

[0074] The diaphragm 301 may include a surround portion 3011, a first fixing portion 3012 located inside the surround portion 3011, and a second fixing portion 3013 located outside the surround portion 3011.

[0075] The surround portion 3011 protrudes in the z-axis direction towards the magnetic conductive plate 201, and the main restoring force of the vibration system 300 is provided by the laterally inwardly retracted surround portion 3011. There is a vibration gap (not shown in the figure) between the surround portion 3011 and the magnetic conductive plate 201 to provide a vibration space for the up and down vibration of the surround portion 3011.

[0076] The first fixing part 3012 and the second fixing part 3013 extend along the x-axis or y-axis direction, and the surfaces of the first fixing part 3012 and the second fixing part 3013 can be coplanar.

[0077] In some embodiments, the first fixing part 3012 is fixed to the other end of the speaker frame 100 away from the magnetic conductive plate 201. The surround part 3011 and the second fixing part 3013 are located outside the receiving space of the speaker frame 100, and the second fixing part 3013 is connected to the dome 302.

[0078] In this way, the surround part 3011 of the diaphragm 301 can be retracted below the dome 302, and the bonding width between the diaphragm 301 and the speaker frame 100 does not affect the area of the dome 302, and thus does not affect the effective vibration area of the dome 302, which is beneficial to increasing the effective sound radiation area of the speaker.

[0079] The dome 302 and the second fixing part 3013 of the diaphragm 301 are fixed by a snap connection. Correspondingly, the second fixing part 3013 may include a support part 30131 and a blocking part 30132.

[0080] One end of the support part 30131 is connected to the surround part 3011, and the other end extends in a direction away from the surround part 3011; the surface of the support part 30131 and the surface of the first fixing part 3012 can be coplanar.

[0081] The blocking part 30132 is located on the surface of the support part 30131 facing the dome 302, and the extending direction of the blocking part 30132 is perpendicular to the extending direction of the support part 30131. The blocking part 30132 is arranged offset from the edge of the support part 30131, and the blocking part 30132 is retracted by a first distance L1 relative to the edge of the support part 30131.

[0082] In this way, a snap connection space can be formed between the outside of the blocking part 30132 and the support part 30131, which is convenient for subsequent snap connection with the dome 302.

[0083] Figure 9 This is the first structural schematic diagram of the dome provided by the embodiment of the present application. Among them, Figure 9 in (a) shows the surface structure of the dome 302 facing away from the diaphragm 301, Figure 9 in (b) shows the surface structure of the dome 302 facing the diaphragm 301.

[0084] Combined with Figure 6 and Figure 9 as shown in (a) and (b) therein, in some embodiments, the dome 302 is located on the side of the diaphragm 301 away from the speaker frame 100 and is connected to the diaphragm 301.

[0085] In this way, the dome 302, the diaphragm 301, the chassis 100, and the magnetic circuit system 200 enclose the rear sound cavity of the speaker (not shown in the figure). The rear sound cavity is used for low-frequency tuning (extending the lower limit of low frequency through the design of the cavity volume and the vent hole / ported tube), air pressure balance (buffering the air compression caused by the backward movement of the dome 302 to reduce non-linear distortion), suppressing acoustic short-circuit (isolating the sound wave behind the dome 302 to avoid cancellation with the forward sound wave), etc.

[0086] The dome 302 is a frame body with an opening at one end, and the outer dimension of the dome 302 has a similar relationship with the outer dimension of the speaker. In this way, the size of the dome 302 can be increased, so that the dome 302 has a large flat surface to facilitate increasing the effective sound radiation area.

[0087] The dome 302 may include a first dome 3021 and a second dome 3022. The first dome 3021 is a plate-like structure, and the first dome 3021 includes a first surface 3021a and a second surface 3021b that face away from each other; both the first surface 3021a and the second surface 3021b are large flat surfaces, the first surface 3021a faces the diaphragm 301, and the second surface 3021b faces away from the diaphragm 301.

[0088] The second dome 3022 is an annular structure. Among them, the cross-section of the second dome 3022 may be a plate-like structure, such as in the shape of "|", or a bent structure, such as in the shape of "L".

[0089] The second dome 3022 is annularly arranged on the first surface 3021a of the first dome 3021, and the second dome 3022 is connected to the four peripheral edges of the first dome 3021.

[0090] When the cross-section of the second dome 3022 is a plate-like structure, the extension direction of the second dome 3022 is perpendicular to the extension direction of the first dome 3021. Exemplarily, the extension direction of the first dome 3021 is parallel to the x-axis / y-axis direction, and the extension direction of the second dome 3022 is parallel to the z-axis direction.

[0091] When the cross-section of the second dome 3022 is a bent structure, one end of the second dome 3022 is connected to the edge of the first dome 3021, and the other end is bent in a direction perpendicular to the first dome 3021.

[0092] The dome 302 is assembled to the diaphragm 301 with the second dome 3022 facing the diaphragm 301. The first dome 3021 is located on the side of the diaphragm 301 away from the chassis 100, and the second dome 3022 is connected to the second fixing portion 3013 of the diaphragm 301.

[0093] In this way, the diaphragm 301 laterally supports the dome 302, which can keep the dome 302 centered, limit the lateral displacement of the dome 302, avoid deformation or uneven stress distribution of the dome 302, and avoid weakening the acoustic performance; the diaphragm 301 provides an elastic restoring force to the dome 302 to ensure the linear movement of the dome 302 in the up and down directions.

[0094] In some embodiments, the first dome 3021 and the second dome 3022 can be connected by an adhesive bonding method or can be integrally formed. The dome 302 is formed by two parts, which can not only improve the stability of the dome 302 but also realize the reciprocating movement up and down.

[0095] The thickness H0 of the first dome 3021 and the second dome 3022 can be very thin to reduce the size of the speaker. Exemplarily, the thickness H0 of both the first dome 3021 and the second dome 3022 is less than or equal to 0.1 mm. Since the second dome 3022 is arranged along the z-axis direction, the thickness H0 of the second dome 3022 can be regarded as the width along the x-axis / y-axis direction. The first dome 3021 and the second dome 3022 can be made of a thin and light metal material with good rigidity, which can not only improve the reliability but also reduce the cost.

[0096] Figure 10 It is the first partial structural schematic diagram of the connection between the dome and the diaphragm provided by the embodiment of the present application.

[0097] As Figure 10 shown, in some embodiments, when the dome 302 and the diaphragm 301 are fixed by a snap connection method, the dome 302 covers the outside of the second fixing portion 3013 of the diaphragm 301, and the first fixing portion 3012 of the diaphragm 301 is adhesively bonded to the chassis 100.

[0098] The second dome 3022 covers the outside of the resisting portion 30132 of the second fixing portion 3013 and is located in the snap connection space formed by the outside of the resisting portion 30132 and the supporting portion 30131. The inner surface of the second dome 3022 abuts against the outer surface of the resisting portion 30132, and the end of the second dome 3022 abuts against the supporting portion 30131.

[0099] Exemplarily, the second dome 3022 and the second fixing portion 3013 of the diaphragm 301 can be connected by an adhesive, or the second dome 3022 and the second fixing portion 3013 of the diaphragm 301 can also be integrally formed.

[0100] In this way, the outside of the diaphragm 301 and the second dome 3022 are edge-joined, which can improve the reliability between the diaphragm 301 and the dome 302.

[0101] Figure 11 It is the structural schematic diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application.

[0102] Combination Figure 6 and Figure 11 As shown, in some embodiments, the voice coil 303 is fixed to the first surface 3021a of the first dome 3021 and is opposite to the magnetic circuit system 200. The voice coil 303 is configured to generate a magnetic field with the magnetic circuit system 200 to drive the first dome 3021 to vibrate and produce sound.

[0103] The voice coil 303 is located above the main magnetic member 202 and the auxiliary magnetic member 203 , and a portion of the voice coil 303 is suspended in the magnetic gap L0 .

[0104] In some embodiments, the main magnetic component 202 may include a main permanent magnet 2021 and a main magnetic ring 2022 , and the secondary magnetic component 203 may include a secondary permanent magnet 2031 and a secondary magnetic conductive ring 2032 .

[0105] The main permanent magnet 2021 and the auxiliary permanent magnet 2031 are both located on the magnetic conductive plate 201 , the main magnetic ring 2022 is located at one end of the main permanent magnet 2021 away from the magnetic conductive plate 201 , and the auxiliary magnetic conductive ring 2032 is located at one end of the auxiliary permanent magnet 2031 away from the magnetic conductive plate 201 .

[0106] The main permanent magnet 2021 is sandwiched between the main magnetic ring 2022 and the magnetic plate 201 to form a closed magnetic loop; the auxiliary permanent magnet 2031 is sandwiched between the auxiliary magnetic ring 2032 and the magnetic plate 201 to form a closed magnetic loop. The main magnetic ring 2022, the auxiliary magnetic ring 2032 and the magnetic plate 201 concentrate the magnetic field to the magnetic gap L0 to enhance the magnetic field strength of the magnetic gap L0.

[0107] In this way, the magnetic field strength at the magnetic gap L0 is the highest, which makes it easier for the voice coil 303 to move in the magnetic gap L0 under the action of the strong magnetic field, thereby driving the dome 302 to vibrate with a large amplitude, thereby improving the sound loudness of the speaker.

[0108] The sound generation principle of the loudspeaker (electric-force-sound conversion process) includes: (1) Electrical signal input: The audio current passes through the voice coil 303 to generate an alternating magnetic field. (2) Magnetic field action: The magnetic field of the voice coil 303 interacts with the constant magnetic field of the magnetic circuit system to generate the Lorentz force, where the direction of the Lorentz force can be determined according to Fleming's left-hand rule. The principle of Fleming's left-hand rule includes: the left hand is flat, the palm is facing the direction of the magnetic field (N→S); the four fingers point to the direction of the current (the direction of positive charge flow); the direction of the thumb is the direction of the force on the conductor. (3) Vibration transmission: The voice coil 303 is driven by the force to drive the first dome 3021 to reciprocate up and down, and the vibration frequency is consistent with the input electrical signal. (4) Sound wave radiation: The first dome 3021 pushes the air around it to form a sparse and dense wave (sound wave), which is transmitted as audible sound.

[0109] During the vibration process, the diaphragm 301 is fixed to the outside of the basin frame 100 and laterally supports the dome 302. When the first dome 3021 is driven by the voice coil 303 to move upward, the first dome 3021 is pulled by the diaphragm 301 through the second dome 3022, and the diaphragm 301 provides a restoring force to the first dome 3021, so that the first dome 3021 returns to its initial position downward.

[0110] In this way, the first dome 3021 is acted upon by the voice coil 303 and the diaphragm 301 to reciprocate up and down, pushing the surrounding air to form sparse and dense waves (sound waves) and propagating as audible sound. In addition, the diaphragm 301 can keep the dome 302 centered, limit the lateral displacement of the dome 302, and provide elastic restoring force to enable the dome 302 to move linearly in the up and down directions.

[0111] It should be noted that the magnitude and direction of the magnetic field can be changed by adjusting the magnitude and direction of the audio current input to the voice coil 303, so that the voice coil 303 generates different degrees of vibration, driving the first dome 3021 to generate different degrees of vibration to generate sounds of different loudness.

[0112] The speaker provided in the embodiment of the present application efficiently converts electrical energy into sound energy through the precise cooperation of the magnetic circuit system 200 and the vibration system 300. The basin frame 100 provides structural support, and the voice coil 303, the dome 302 and the diaphragm 301 are linked to achieve precise vibration, which is finally transmitted as sound through the air.

[0113] See again Figure 7 As shown in the content, in some embodiments, the magnetic conductive plate 201 includes a plurality of second air leakage holes 2012, and the plurality of second air leakage holes 2012 penetrate the upper and lower surfaces of the magnetic conductive plate 201 to connect the rear sound cavity of the speaker with the external environment, thereby ensuring that the air around the voice coil 303 is connected with the external environment to balance the air pressure and reduce the air spring effect.

[0114] When the dome 302 vibrates back and forth (up and down), it will compress or expand the closed air cavity behind the magnetic circuit system 200. If the air cannot circulate, the air pressure in the cavity will form a reaction force similar to a "spring", hindering the free movement of the dome 302. The second air leakage hole 2012 is opened on the magnetic plate 201, and the air pressure inside and outside the magnetic circuit system 200 can be balanced through the second air leakage hole 2012, weakening the air spring effect, making the movement of the dome 302 more linear, and reducing distortion. In addition, the sound waves generated below the dome 302 are guided out through the second air leakage hole 2012 to avoid phase cancellation with the sound waves above (especially in the low and medium frequency bands), thereby reducing the loss of sound energy.

[0115] The aperture size of the second vent hole 2012 can be adjusted according to actual application scenarios. By adjusting the aperture size of the second vent hole 2012, the acoustic impedance in the low-frequency band can be optimized, and the sound pressure level in a specific frequency band (such as the tuning frequency of a subwoofer) can be enhanced. In this way, after reducing the air resistance, the dome 302 can respond more quickly to the driving signal of the voice coil 303, improving the dynamic performance.

[0116] It should be noted that the second vent hole 2012 can also achieve a heat dissipation function, discharging the heat generated by the voice coil 303 due to the passing of current to the external environment, delaying the temperature rise of the voice coil 303, and thereby avoiding damage caused by excessive internal temperature of the magnetic circuit system 200.

[0117] In some embodiments, multiple second vent holes 2012 are symmetrically and uniformly distributed relative to the voice coil 303, and the multiple second vent holes 2012 are opened at positions corresponding to the respective corners of the voice coil 303 on the magnetic conductive plate 201. Exemplarily, if the voice coil 303 includes four corners, the number of the second vent holes 2012 is also four.

[0118] When the voice coil 303 moves axially (up and down) in the magnetic field, its cross-sectional shape (usually rectangular or racetrack-shaped) will cause non-uniform air flow in the magnetic circuit cavity. And the four corners are the geometric limit positions of the cross-section of the voice coil 303, where the air flow velocity is the largest. Therefore, symmetrically opening the second vent holes 2012 at positions on the magnetic conductive plate 201 opposite to the four corners of the voice coil 303 can balance the air flow direction and avoid local eddy currents or pressure concentration.

[0119] In this way, it can be ensured that there is no pressure difference in the air compression / expansion in the rear sound cavity at different phases, so that the dome 302 can uniformly receive the driving force from the voice coil 303, ensuring the accuracy of the up-and-down reciprocating movement of the dome 302, and thus ensuring the sound quality of the speaker.

[0120] Figure 12 It is a schematic diagram of the effective sound radiation area of the speaker provided by the embodiment of the present application.

[0121] Such as Figure 12 As shown, in some embodiments, the second surface 3021b of the first dome 3021 is used to form the front sound cavity (not shown in the figure) of the speaker, and the front sound cavity is used to guide the sound wave in front of the first dome 3021 to diffuse in a specific direction, optimizing the high-frequency directivity. In the embodiment of the present application, the sound output direction of the front sound cavity is along the z-axis direction, that is, above (in front of) the first dome 3021, realizing upward (forward) sound output.

[0122] Since the diaphragm 301 is located outside the chassis 100, in this scenario, the ideal effective sound radiation area Sd' of the speaker should be equal to the sum of the equivalent areas of the diaphragm 301 and the dome 302 jointly pushing the air.

[0123] However, during the vibration process, the air pushed downward by the diaphragm 301 communicates with the front sound cavity. And the diaphragm 301 retracts below the dome 302. The sound wave phases below the diaphragm 301 and above the first dome 3021 are opposite (differing by 180°). When the sound wave below the diaphragm 301 is not isolated, it will cancel out the sound wave of the first dome 3021.

[0124] The first fixing portion 3012 of the diaphragm 301 is bonded to the chassis 100. The a point in the bonding area is the internal and external separation position, and the a point faces the outer surface of the chassis 100. The area between the a point and the outer edge of the dome 302 is the area where the sound waves cancel each other out. The area of the region of the first dome 3021 opposite to the sound wave cancellation area is the sound wave loss area S0.

[0125] The sound energy generated by the vibration of the diaphragm 301 in the area outside the a point dissipates to non-target directions (such as downward) and does not participate in the superposition of the forward sound field, so that the sound wave below the diaphragm 301 is not effectively utilized, and this part of the area (sound wave loss area S0) does not contribute to the effective sound radiation of the speaker.

[0126] In this way, the effective vibration area of the first dome 3021 is the difference between the ideal effective sound radiation area Sd' and the sound wave loss area S0, that is, the actual effective sound radiation area Sd1 of the speaker is equal to the difference between the ideal effective sound radiation area Sd' and the sound wave loss area S0.

[0127] The actual effective sound radiation area Sd1 of the speaker includes the area of the region surrounded by the position of the first dome 3021 opposite to the first position (a point) of the first fixing portion 3012. The first position is the position where the first fixing portion 3012 faces the outer surface of the chassis 100.

[0128] Compared with Figure 3 the shown speaker assembly 30, the diaphragm structure 32 of the speaker assembly 30 is located inside the chassis structure 31. The bonding point of the bonding area between the diaphragm structure 32 and the chassis structure 31 facing the inside is the internal and external separation position. The area inside the bonding point of the diaphragm structure 32 vibrates. This bonding point is equivalent to Figure 12 the b point in , that is, the position corresponding to the inner surface of the first fixing portion 3012 and the chassis 100.

[0129] In this way, the effective sound radiation area Sd0 of the speaker assembly 30 is the area surrounded by the b point, and the area surrounded by the b point is smaller than the area surrounded by the a point. Therefore, the actual effective sound radiation area Sd1 of the speaker provided by the embodiment of the present application is greater than Figure 3 the effective sound radiation area Sd0 of the shown speaker assembly 30.

[0130] In the loudspeaker provided by the embodiment of the present application, the diaphragm 301 is bonded to the outside of the chassis 100. The dome 302 includes a first dome 3021 and a second dome 3022. The first dome 3021 is connected to the outer edge of the diaphragm 301 through the second dome 3022. The first dome 3021 is bonded to the voice coil 303 and vibrates to generate sound under the drive of the voice coil 303. In this way, the dome 302 is located above the diaphragm 301, and the diaphragm 301 is used to laterally support the dome 302, so that the shape of the dome 302 can be maximized. The dome 302 is divided into two parts: the middle first dome 3021 and the second dome 3022 with an outer edge ring. This can not only improve the reliability of the dome 302, but also increase the area of the first dome 3021 for vibrating and generating sound. Moreover, the bonding width between the diaphragm 301 and the chassis 100 does not affect the area of the first dome 3021, so as to increase the effective vibration area of the first dome 3021, and further increase the effective sound radiation area of the loudspeaker, thereby increasing the external volume of the loudspeaker.

[0131] Figure 13 is the second structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 14 is Figure 13 the structural schematic diagram of the C-C cross-section in. Among them, Figure 13 in (a) and (b) show the structures of different perspectives of the loudspeaker.

[0132] As Figure 13 in (a), (b) and Figure 14 shown, in some embodiments, the difference between the loudspeaker provided by the embodiment of the present application and the loudspeaker provided by the foregoing embodiment is that it further includes: a housing 500. Other contents can refer to the contents of the loudspeaker provided by the foregoing embodiment and will not be elaborated here.

[0133] The housing 500 is a frame structure with one end open and has an accommodation space.

[0134] The housing 500 covers the outside of the chassis 100, the magnetic circuit system 200 and the vibration system 300, and is fixed to the magnetic conductive plate 201. To facilitate bonding with the housing 500, the edge of the magnetic conductive plate 201 extends outwards to adapt to the size of the housing 500.

[0135] The height of the housing 500 in the z-axis direction is greater than Figure 6 the overall height of the loudspeaker shown, so that there is a certain distance between the upper end of the housing 500 and the first dome 3021; the width / length of the housing 500 in the x / y-axis direction is greater than Figure 6 the overall width / length of the loudspeaker shown, so that there is a certain distance between the peripheral side of the housing 500 and the second dome 3022.

[0136] In this way, the outer shell 500 and the second surface 3021b of the first dome 3021 enclose the front sound cavity of the speaker, and the vibration gap between the diaphragm 301 and the magnetic conductive plate 201 communicates with the front sound cavity.

[0137] An sound outlet 501 can be opened on the outer shell 500, and the sound outlet 501 communicates with the front sound cavity. The different positions of the sound outlet 501 determine the direction of sound wave diffusion.

[0138] Exemplarily, if the sound outlet 501 is located at the upper end of the outer shell 500 adjacent to the first dome 3021, the sound waves generated by the vibration of the first dome 3021 can be diffused from the upper (front) side of the speaker to achieve upward sound output. If the sound outlet 501 is located on the side wall of the outer shell 500, the sound waves generated by the vibration of the first dome 3021 can be diffused from the side surface of the speaker to achieve side sound output.

[0139] The speaker provided by the embodiment of the present application can utilize the outer shell 500 to determine the sound output direction to improve the applicable range of the speaker on the premise of increasing the effective sound radiation area.

[0140] Figure 15 It is the second exploded structural schematic diagram of the speaker provided by the embodiment of the present application.

[0141] As Figure 15 shown, in some embodiments, a speaker provided by the embodiment of the present application includes: a first sealing ring 401, a chassis 100, and a magnetic circuit system 200 and a vibration system 300 connected to the chassis 100.

[0142] The functions, structural compositions, connection manners, etc. of the chassis 100, the magnetic circuit system 200, and the vibration system 300 can all refer to the Figures 4 to 12 shown speaker, and will not be elaborated here.

[0143] The first sealing ring 401 is an elastomer (such as rubber, silica gel, etc.) or an elastic structure (such as a corrugated or serrated elastic wave), and the first sealing ring 401 has elastic deformation and a sealing function.

[0144] Combined with Figure 12 the content of the shown speaker, when vibrating to generate sound, since the air behind (below) the diaphragm 301 directly escapes downward, in the area corresponding to the sound wave loss area S0, the low-frequency sound waves will be attenuated due to phase cancellation, resulting in a decrease in the effective sound pressure level (SPL) of the speaker, and further resulting in volume loss.

[0145] In order to further increase the effective sound radiation area of the speaker and improve the external sound loudness, a first sealing ring 401 is arranged below the diaphragm 301 to isolate the sound waves behind (below) the diaphragm 301 and avoid generating a sound wave cancellation area (the area corresponding to S0), so as to increase the effective sound radiation area.

[0146] Figure 16 It is the third structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 17 is Figure 16 The structural schematic diagram of the D-D cross-section in. Among them, Figure 16 The structure of the dome 302 is not shown in (b) in.

[0147] Such as Figure 16 in (a), (b) and Figure 17 As shown, in some embodiments, the first sealing ring 401 is of an annular structure. The first sealing ring 401 is sleeved on the outside of the chassis 100 and is located between the diaphragm 301 and the magnetic conductive plate 201.

[0148] The upper and lower surfaces of the first sealing ring 401 are respectively in contact with the diaphragm 301 and the magnetic conductive plate 201. The inner surface of the first sealing ring 401 is in contact with the outer surface of the chassis 100, and the outer surface of the first sealing ring 401 is coplanar with the outer surface of the second dome 3022.

[0149] In this way, the vibration gap between the diaphragm 301 and the magnetic conductive plate 201 can be sealed by using the first sealing ring 401, and the sound wave path between the rear (lower) side of the diaphragm 301 and the front sound cavity is completely isolated, avoiding the phase cancellation of the sound waves escaping downward from the rear (lower) side of the diaphragm 301 and the sound waves upward in the front direction (the sound waves generated by the first dome 3021), especially the sound waves in the low frequency band, thereby reducing the sound energy loss and increasing the effective sound radiation area.

[0150] Figure 18 It is the second top view structural schematic diagram of the magnetic circuit system and the voice coil provided by the embodiment of the present application.

[0151] Such as Figure 17 and Figure 18 As shown, in some embodiments, the magnetic conductive plate 201 may include a plurality of first air vent holes 2011. The plurality of first air vent holes 2011 are symmetrically and uniformly distributed with respect to the voice coil 303. The first air vent holes 2011 penetrate through the upper and lower surfaces of the magnetic conductive plate 201 to communicate the vibration gap with the external environment.

[0152] Exemplarily, the first air vent holes 2011 include two. The two first air vent holes 2011 are located outside the two long sides of the voice coil 303 and are located outside the corresponding auxiliary magnetic members 203.

[0153] The plurality of first air vent holes 2011 are opposite to the first sealing ring 401. The first air vent holes 2011 are located outside the rear sound cavity. The first air vent holes 2011 are used for the air flow generated by the vibration of the diaphragm 301 to flow out to the external environment.

[0154] In this way, after using the first sealing ring 401 to enclose the rear space of the diaphragm 301, the original open space is changed into a semi-closed space. When the diaphragm 301 vibrates, through the air flow exchange of the first air vent 2011, the air behind the diaphragm 301 is ensured to be conducted with the external environment, which can balance the air pressure fluctuation during the vibration of the diaphragm 301, avoid the enhancement of the air spring rigidity caused by complete sealing, and reduce the air spring effect.

[0155] It should be noted that the other functions of the first air vent 2011 can refer to the content of the second air vent 2012 in the foregoing embodiments, and will not be elaborated here.

[0156] Figure 19 is a schematic structural diagram of the speaker frame provided by the embodiment of the present application; Figure 20 is Figure 16 a schematic structural diagram of the cross-section E-E in. Among them, Figure 20 the structure of the dome 302 is correspondingly shown.

[0157] As Figure 19 and Figure 20 shown, in some embodiments, the speaker frame 100 includes a plurality of first air vents 101, and the first air vents 101 penetrate through the inner and outer surfaces of the speaker frame 100 along the x-axis / y-axis direction to connect the area where the first sealing ring 401 is located and the rear sound cavity.

[0158] The plurality of first air vents 101 are symmetrically distributed, so that the sound waves behind the diaphragm 301 can be directionally led to the rear sound cavity instead of leaking irregularly. In this way, not only can air flow disturbance be avoided and the effective sound radiation area be prevented from being affected; but also turbulent noise can be reduced to improve the volume clarity.

[0159] The first air vent 101 is located inside the first sealing ring 401 and serves as a sound wave diversion channel to connect the rear of the diaphragm 301 and the rear sound cavity, so that the air in the space formed by the first sealing ring 401 and the surround portion 3011 of the diaphragm 301 is conducted with the air around the voice coil 303 in the rear sound cavity. The first air vent 101 and the rear sound cavity form a resonance system, which is tuned to the target low frequency, and the sound pressure level can be significantly improved.

[0160] The first sealing ring 401 isolates the rear of the diaphragm 301 from the front sound cavity, and forces the sound waves behind the diaphragm 301 to enter the rear sound cavity through the first air vents 101 of the speaker frame 100.

[0161] When the diaphragm 301 vibrates, the sound waves behind the diaphragm 301 are restricted by the first sealing ring 401. Part of the sound waves enter the rear sound cavity through the first ventilation hole 101 of the speaker frame 100 and are conducted to the external environment through the second air release hole 2012 on the magnetic conductive plate 201; part of the sound waves perform air flow exchange through the first air release hole 2011 on the magnetic conductive plate 201 and are conducted to the external environment. In this way, the air behind the diaphragm 301 is conducted to the external environment, and the air pressure fluctuation during the vibration of the dome 302 can be balanced. Moreover, the sound wave path between the rear (lower) side of the diaphragm 301 and the front sound cavity is completely isolated by the first sealing ring 401, avoiding the phase cancellation between the sound waves escaping downward from the rear (lower) side of the diaphragm 301 and the sound waves upward in the front direction (the sound waves generated by the first dome 3021), thereby reducing the sound energy loss and increasing the effective sound radiation area.

[0162] Refer to again Figure 6 and Figure 12 Referring to the content shown again and, in the loudspeaker provided in the foregoing embodiment, the sound waves behind the diaphragm 301 do not participate in the forward sound field superposition due to direct downward leakage. Although the effective sound radiation area Sd1 can be increased compared with the loudspeaker assembly 30 of the prior art, the front surface area of the dome 302 (the surface area of the second surface 3021b of the first dome 3021) is not fully utilized. Among them, the effective sound radiation area Sd1 of the loudspeaker provided in the foregoing embodiment only calculates the projected area of the first dome 3021 that is not covered by the area outside point a of the diaphragm 301.

[0163] Refer to again Figure 17 Referring to the content shown again, in the loudspeaker provided in the embodiment of the present application, after the rear of the diaphragm 301 is isolated by the first sealing ring 401, the sound pressure behind the diaphragm 301 is directionally led out (instead of randomly leaking) through the first air release hole 2011 and the first ventilation hole 101 and is conducted to the external environment.

[0164] In this way, the effective vibration area of the first dome 3021 can be equivalently regarded as increased by an "auxiliary radiation area", and this auxiliary radiation area is Figure 12 the sound wave loss area S0 shown, that is, the actual effective sound radiation area of the loudspeaker is the sum of the effective sound radiation area Sd1 and the sound wave loss area S0. That is to say, the actual effective sound radiation area Sd2 of the loudspeaker includes the surface area of the second surface 3021b of the first dome 3021, so as to fully utilize the front surface area of the dome 302.

[0165] It should be noted that if the second dome 3022 has a bent cross-section, the actual effective sound radiation area Sd2 of the speaker includes the total surface area of the second surface 3021b of the first dome 3021 and the surface coplanar with the second surface 3021b in the second dome 3022. It can be understood that the actual effective sound radiation area Sd2 of the speaker is the surface area of the dome 302 facing the front sound cavity.

[0166] In the speaker provided by the embodiment of the present application, the diaphragm 301 is bonded to the outside of the chassis 100. The dome 302 includes a first dome 3021 and a second dome 3022. The first dome 3021 is connected to the outer edge of the diaphragm 301 through the second dome 3022. The first dome 3021 is bonded to the voice coil 303 and vibrates to generate sound under the drive of the voice coil 303. The first sealing ring 401 is sleeved on the outside of the chassis 100 and is located between the diaphragm 301 and the magnetic yoke 201. In this way, the dome 302 is located above the diaphragm 301, and the diaphragm 301 is used to laterally support the dome 302, which can maximize the shape of the dome 302. The dome 302 is divided into two parts: the middle first dome 3021 and the second dome 3022 with an outer edge ring. This can not only improve the reliability of the dome 302, but also increase the area of the first dome 3021 used for vibrating and generating sound. Moreover, the bonding width between the diaphragm 301 and the chassis 100 does not affect the area of the first dome 3021, so as to increase the effective vibration area of the first dome 3021, and further increase the effective sound radiation area of the speaker, thereby increasing the external sound volume of the speaker. At the same time, a plurality of first air vents 2011 are opened on the magnetic yoke 201 to guide the sound waves behind the diaphragm 301 to the external environment. A plurality of first ventilation holes 101 are opened on the chassis 100 to guide the sound waves behind the diaphragm 301 to the rear sound cavity, and then conduct them to the external environment through the second air vents 2012 on the magnetic yoke 201. In this way, the sound wave path between the back of the diaphragm 301 and the front sound cavity can be completely isolated, avoiding the phase cancellation of the sound waves escaping downward behind the diaphragm 301 and the sound waves upward (the sound waves generated by the first dome 3021), especially in the low-frequency band, thereby reducing the sound energy loss and increasing the effective sound radiation area to a greater extent, so as to further increase the external sound volume of the speaker.

[0167] Figure 21 It is the fourth structural schematic diagram of the speaker provided by the embodiment of the present application; Figure 22 is Figure 21 the structural schematic diagram of the F-F cross-section. Among them, Figure 21 in (a) and (b) show the structures of different perspectives of the speaker.

[0168] As Figure 21 and Figure 22 shown, in some embodiments, the speaker provided by the embodiment of the present application, compared with Figures 15 to 20The difference of the loudspeaker provided by the illustrated embodiment is that it further includes: a housing 500. Other contents can refer to the contents of the loudspeaker provided by the foregoing embodiment, which will not be elaborated here.

[0169] The housing 500 is a frame structure with an open end and has an accommodation space.

[0170] The housing 500 covers the outside of the chassis 100, the magnetic circuit system 200 and the vibration system 300, and is fixed to the magnetic conductive plate 201. To facilitate bonding with the housing 500, the edge of the magnetic conductive plate 201 extends outwards to adapt to the size of the housing 500.

[0171] The height of the housing 500 in the z-axis direction is greater than Figure 17 the overall height of the illustrated loudspeaker, so that there is a certain distance between the upper end of the housing 500 and the first dome 3021; the width / length of the housing 500 in the x / y-axis direction is greater than Figure 17 the overall width / length of the illustrated loudspeaker, so that there is a certain distance between the circumferential side of the housing 500 and the second dome 3022.

[0172] In this way, the front sound cavity of the loudspeaker is formed by the housing 500 and the second surface 3021b of the first dome 3021, and the vibration gap between the diaphragm 301 and the magnetic conductive plate 201 communicates with the front sound cavity.

[0173] An sound outlet 501 can be opened on the housing 500, and the sound outlet 501 communicates with the front sound cavity. The position of the sound outlet 501 determines the direction of sound wave diffusion.

[0174] Exemplarily, if the sound outlet 501 is located at the upper end of the housing 500 adjacent to the first dome 3021, the sound waves generated by the vibration of the first dome 3021 can be diffused from the upper (front) side of the loudspeaker to achieve upward sound emission. If the sound outlet 501 is located on the side wall of the housing 500, the sound waves generated by the vibration of the first dome 3021 can be diffused from the side surface of the loudspeaker to achieve side sound emission.

[0175] For the loudspeaker provided by the embodiment of the present application, on the premise of realizing an increase in the effective sound radiation area, the housing 500 can be used to determine the sound emission direction to improve the applicable range of the loudspeaker.

[0176] Figure 23 It is the third exploded structural schematic diagram of the loudspeaker provided by the embodiment of the present application.

[0177] As Figure 23 shown, in some embodiments, a loudspeaker provided by the embodiment of the present application includes: a second sealing ring 402, a chassis 100, and a magnetic circuit system 200 and a vibration system 300 connected to the chassis 100.

[0178] The functions, structural components, connection methods, etc. of the chassis 100, magnetic circuit system 200, and vibration system 300 can all be referred to Figure 4 and Figure 12 the loudspeaker shown, which will not be elaborated here.

[0179] The second sealing ring 402 is an elastomer (such as rubber, silicone, etc.) or an elastic structure (such as a corrugated or serrated elastic wave). The second sealing ring 402 has elastic deformation and a sealing function.

[0180] The loudspeaker provided by the embodiment of the present application is different from Figures 15 to 20 the loudspeaker shown in that the first sealing ring 401 is replaced by the second sealing ring 402, and the structure of the dome 302 is different, and the connection method between the chassis 100 and the diaphragm 301 is different. Other contents can all be referred to Figures 15 to 20 the content of the loudspeaker shown, which will not be elaborated here.

[0181] Figure 24 This is the second structural schematic diagram of the diaphragm provided by the embodiment of the present application. Among them, Figure 24 in (a) and (b) show the structures of the diaphragm 301 from different perspectives.

[0182] As Figure 24 shown in (a) and (b), in some embodiments, the diaphragm 301 may include a surround portion 3011, a first fixing portion 3012 located inside the surround portion 3011, and a second fixing portion 3013 located outside the surround portion 3011.

[0183] The first fixing portion 3012 and the second fixing portion 3013 extend along the x-axis or y-axis direction, and the surfaces of the first fixing portion 3012 and the second fixing portion 3013 may be coplanar. Both the first fixing portion 3012 and the second fixing portion 3013 are in the form of skirts located inside and outside the surround portion 3011, facilitating the connection of the inside and outside of the diaphragm 301 to the dome 302 and the chassis 100.

[0184] It should be noted that other structural contents of the diaphragm 301 can be referred to Figure 8 the content of the diaphragm 301 shown, which will not be elaborated here.

[0185] Figure 25 This is the fifth structural schematic diagram of the loudspeaker provided by the embodiment of the present application; Figure 26 This is Figure 25 the structural schematic diagram of the G-G cross-section in. Among them, Figure 25 the structure of the first dome 3021 is not shown in (b) in.

[0186] As Figure 25 shown in (a), (b) and Figure 26As shown, in some embodiments, the diaphragm 301 is located within the receiving space of the chassis 100. One end of the diaphragm 301 can be fixedly connected to the chassis 100 through an adhesive. The other end of the diaphragm 301 extends towards the direction of the main magnetic member 202, and the other end of the diaphragm 301 is located inside the receiving space of the chassis 100.

[0187] The second fixing portion 3013 of the diaphragm 301 is fixed to the other end of the chassis 100 and has a vibration gap with the first dome 3021, providing a vibration space for the up-and-down vibration of the surround portion 3011; the surround portion 3011 and the first fixing portion 3012 are located inside the chassis 100; the first fixing portion 3012 is connected to the second dome 3022, and the first fixing portion 3012 is bonded to the second dome 3022 and is in a vertical state.

[0188] In this way, the chassis 100 provides lateral support for the diaphragm 301, which can suppress the lateral vibration mode. The diaphragm 301 is located within the receiving space of the chassis 100, that is, the diaphragm 301 is located in the rear sound cavity of the speaker, so that the sound wave behind the diaphragm 301 is directly communicated with the rear sound cavity, which can prevent the sound wave generated by the diaphragm 301 from flowing forward into the front sound cavity and canceling the phase of the sound wave in the front sound cavity, thereby reducing the sound energy loss, and further improving the effective sound radiation area and sound pressure level to increase the external volume.

[0189] Figure 27 It is the second structural schematic diagram of the dome provided by the embodiment of the present application. Among them, Figure 27 Figures (a) and (b) show the structures of the dome 302 from different perspectives.

[0190] As Figure 27 shown in Figures (a) and (b), in some embodiments, the second dome 3022 is disposed on the first surface 3021a of the first dome 3021, and the second dome 3022 is retracted inward by a second distance L2 relative to the edge of the first dome 3021.

[0191] That is to say, the first dome 3021 is a plate-like structure, the second dome 3022 is an annular structure, and the cross-section of the second dome 3022 is a plate-like structure, such as in the shape of "|". The second dome 3022 is not connected to the edge of the first dome 3021, but is connected to the first surface 3021a of the first dome 3021.

[0192] In this way, the connection position of the second dome 3022 and the diaphragm 301 is located below the first dome 3021, so as to utilize the diaphragm 301 to laterally support the first dome 3021, which can keep the first dome 3021 centered, limit the lateral displacement of the first dome 3021, avoid the deformation or uneven stress distribution of the first dome 3021, and avoid weakening the acoustic performance.

[0193] It should be noted that the first dome 3021 and the second dome 3022 can be connected by bonding or integrally formed. The dome 302 is formed by two parts, which can not only improve the stability of the dome 302, but also realize the reciprocating motion up and down.

[0194] In some embodiments, the second dome 3022 may include a plurality of second vent holes 3023, and the second vent holes 3023 penetrate the inner and outer surfaces of the second dome 3022 along the x-axis / y-axis direction.

[0195] The plurality of second vent holes 3023 communicate with the rear sound cavity of the speaker to connect the vibration gap where the diaphragm 301 is located and the rear sound cavity. In this way, the second vent holes 3023 can be used as a sound wave diversion channel for the air flow generated when the diaphragm 301 vibrates to flow out into the rear sound cavity, and then conduct through the second vent holes 2012 on the magnetic guide plate 201 to the external environment, so as to balance the air pressure fluctuation when the dome 302 vibrates.

[0196] The plurality of second vent holes 3023 are symmetrically distributed. Exemplarily, the second vent holes 3023 include four, and the four second vent holes 3023 are respectively formed on the four sides of the second dome 3022. In this way, not only can air flow disturbance be avoided and the effective sound radiation area be prevented from being affected, but also turbulent noise can be reduced to improve the volume clarity.

[0197] Figure 28 It is the second partial structural schematic diagram of the connection between the dome and the diaphragm provided by the embodiment of the present application.

[0198] As Figure 28 shown, in some embodiments, the chassis 100 is opposite to the edge of the first dome 3021, and the outer surface of the chassis 100 and the end surface of the first dome 3021 may be coplanar.

[0199] In this way, the diaphragm 301 is retracted below the first dome 3021, so that the bonding width between the chassis 100 and the diaphragm 301 does not affect the area of the first dome 3021, and thus does not affect the area of the effective vibration region of the first dome 3021, which is beneficial to increasing the effective sound radiation area of the speaker. Moreover, the diaphragm 301 is located between the first dome 3021 and the chassis 100, and together with the second dome 3022, it can enclose a vibration gap for the diaphragm 301 to vibrate.

[0200] When assembling the diaphragm 301, the dome 302 and the chassis 100, the second fixing portion 3013 of the diaphragm 301 is bonded to the chassis 100, and the first fixing portion 3012 and the surround portion 3011 of the diaphragm 301 are located in the receiving space of the chassis 100. One end of the second dome 3022 is vertically bonded to the first fixing portion 3012 of the diaphragm 301, and the second vent hole 3023 on the second dome 3022 communicates the vibration gap of the diaphragm 301 and the rear sound cavity inside the second dome 3022. The first dome 3021 is vertically bonded to the other end of the second dome 3022. The extending directions of the first fixing portion 3012 and the second fixing portion 3013 are the same and parallel to the extending direction of the first dome 3021.

[0201] In this way, the surround portion 3011 of the diaphragm 301 is retracted below the first dome 3021, and the inner side of the diaphragm 301 is connected to the second dome 3022, which can improve the reliability between the diaphragm 301 and the dome 302. The diaphragm 301 laterally supports the dome 302, which can keep the dome 302 centered, limit the lateral displacement of the dome 302, and provide an elastic restoring force to ensure the linear movement of the dome 302 in the up and down directions.

[0202] Refer again to Figure 26 As shown, in some embodiments, the second sealing ring 402 is an annular structure. The second sealing ring 402 is sleeved on the outer side of the second dome 3022 and is located between the diaphragm 301 and the first dome 3021.

[0203] The upper and lower surfaces of the second sealing ring 402 are respectively in contact with the diaphragm 301 and the first dome 3021. The inner surface of the second sealing ring 402 is in contact with the outer surface of the second dome 3022, and the outer surface of the second sealing ring 402 is coplanar with the outer surface of the first dome 3021 and the outer surface of the chassis 100.

[0204] The second sealing ring 402 can be used to seal the vibration gap between the diaphragm 301 and the first dome 3021, isolate the air flow between the diaphragm 301 and the first dome 3021, and prevent the sound wave in front of the diaphragm 301 from entering the front sound cavity. By means of the second vent hole 3023 on the second dome 3022, the air in the space formed by the second sealing ring 402 and the surround portion 3011 of the diaphragm 301 is communicated with the air around the voice coil 303 in the rear sound cavity, and the air pushed by the diaphragm 301 during vibration is forced to enter the rear sound cavity through the second vent hole 3023.

[0205] After the second sealing ring 402 seals the front space of the diaphragm 301, the original open space becomes a semi-closed space. When the diaphragm 301 vibrates, through the air flow exchange of the second ventilation hole 3023, the air in front of the diaphragm 301 is conducted to the rear sound cavity, and then is led out to the external environment through the second air vent 2012 on the magnetic conductive plate 201. In this way, the outgoing sound wave is superposed in phase with the sound wave behind the diaphragm 301, not only will not be cancelled, but also can enhance the low-frequency sound pressure level (SPL). Moreover, the superposed sound wave is led out to the external environment, which can balance the air pressure fluctuation during the vibration of the dome 302, avoid the increase of the air spring rigidity caused by complete sealing, and reduce the air spring effect.

[0206] The loudspeaker provided by the embodiment of the present application completely isolates the sound wave path in front (above) of the diaphragm 301 from the front sound cavity by using the second sealing ring 402. The sound pressure in front of the diaphragm 301 is directionally led out (instead of randomly leaking) to the rear sound cavity through the second ventilation hole 3023. The rear of the diaphragm 301 is located in the rear sound cavity, so that the sound wave escaping downward behind the diaphragm 301 is fused and superposed with the sound wave led out through the second ventilation hole 3023, and is jointly led out to the external environment through the second air vent 2012 of the rear sound cavity. In this way, the sound wave generated by the diaphragm 301 can be prevented from being phase-cancelled with the sound wave in the forward direction (the sound wave generated by the first dome 3021), especially in the low-frequency band, thereby reducing the sound energy loss, increasing the effective sound radiation area and the low-frequency sound pressure level (SPL), and improving the sound loudness.

[0207] The effective vibration area of the first dome 3021 can be equivalently regarded as increasing an "auxiliary radiation area", and this auxiliary radiation area is Figure 12 the shown sound wave loss area S0, that is, the actual effective sound radiation area Sd3 of the loudspeaker is the sum of the effective sound radiation area Sd1 and the sound wave loss area S0. That is to say, the actual effective sound radiation area Sd3 of the loudspeaker includes the surface area of the second surface 3021b of the first dome 3021. It can also be understood that the actual effective sound radiation area Sd3 of the loudspeaker is the surface area of the dome 302 facing the front sound cavity.

[0208] The loudspeaker provided by an embodiment of the present application has a diaphragm 301 bonded to the inner side of a chassis 100. The dome 302 includes a first dome 3021 and a second dome 3022. The first dome 3021 is connected to the inner edge of the diaphragm 301 through the second dome 3022. The first dome 3021 is bonded to a voice coil 303 and vibrates to generate sound under the drive of the voice coil 303. A second sealing ring 402 is sleeved on the outer side of the second dome 3022 and is located between the diaphragm 301 and the first dome 3021. In this way, the dome 302 is located above the diaphragm 301, and the diaphragm 301 is used to laterally support the dome 302, so that the shape of the dome 302 can be maximized. The dome 302 is divided into two parts, namely the middle first dome 3021 and the second dome 3022 with an outer edge ring. This can not only improve the reliability of the dome 302, but also increase the area of the first dome 3021 for vibrating to generate sound. Moreover, the bonding width between the diaphragm 301 and the chassis 100 does not affect the area of the first dome 3021, so as to increase the effective vibration area of the first dome 3021, and further increase the effective sound radiation area of the loudspeaker, thereby increasing the external volume of the loudspeaker. At the same time, a plurality of second vent holes 3023 are formed in the second dome 3022, and the sound pressure in front of the diaphragm 301 is directionally led out (instead of leaking irregularly) to the rear sound cavity through the second vent holes 3023, and is directly fused and superimposed with the sound wave behind the diaphragm 301 in the rear sound cavity, and is jointly led out to the external environment through the second vent hole 2012 of the rear sound cavity. In this way, the sound wave path between the front of the diaphragm 301 and the front sound cavity can be completely isolated, avoiding the phase cancellation of the sound wave generated by the diaphragm 301 and the sound wave in the forward direction (the sound wave generated by the first dome 3021), especially the sound wave in the low frequency band, thereby reducing the sound energy loss and further increasing the effective sound radiation area and the low frequency sound pressure level to further increase the external volume of the loudspeaker.

[0209] Figure 29 It is the sixth structural schematic diagram of the loudspeaker provided by an embodiment of the present application.

[0210] As Figure 29 shown, in some embodiments, the difference between the loudspeaker provided by an embodiment of the present application and the loudspeaker provided by the embodiment Figures 23 to 28 shown lies in that it further includes: a housing 500. Other contents can refer to the contents of the loudspeaker provided by the foregoing embodiment, and will not be elaborated here.

[0211] The housing 500 is a frame structure with an open end and has an accommodation space.

[0212] The housing 500 covers the outer sides of the chassis 100, the magnetic circuit system 200 and the vibration system 300 and is fixed to the magnetic conductive plate 201. To facilitate bonding with the housing 500, the edge of the magnetic conductive plate 201 extends outwards to adapt to the size of the housing 500.

[0213] The height of the housing 500 in the z-axis direction is greater than Figure 26 the overall height of the shown loudspeaker, such that the upper end of the housing 500 is spaced apart from the first dome 3021 by a certain distance; the width / length of the housing 500 in the x / y-axis direction is greater than Figure 26 the overall width / length of the shown loudspeaker, such that the peripheral side of the housing 500 is spaced apart from the second dome 3022 by a certain distance.

[0214] In this way, the front sound cavity of the loudspeaker is formed by the housing 500 and the second surface 3021b of the first dome 3021, and the vibration gap between the diaphragm 301 and the magnetic conductive plate 201 communicates with the front sound cavity.

[0215] An outlet port 501 can be formed on the housing 500, and the outlet port 501 communicates with the front sound cavity. Different positions of the outlet port 501 determine the direction of sound wave diffusion.

[0216] Exemplarily, if the outlet port 501 is located at the upper end of the housing 500 adjacent to the first dome 3021, the sound waves generated by the vibration of the first dome 3021 can be diffused from the upper (front) side of the loudspeaker to achieve upward sound output. If the outlet port 501 is located on the side wall of the housing 500, the sound waves generated by the vibration of the first dome 3021 can be diffused from the side surface of the loudspeaker to achieve side sound output.

[0217] For the loudspeaker provided by the embodiment of the present application, on the premise of increasing the effective sound radiation area, the housing 500 can be used to determine the sound output direction to improve the applicable range of the loudspeaker.

[0218] Referring again to Figure 1 , the embodiment of the present application also provides an electronic device, including a display screen 10, a middle frame 20, a rear shell, and the loudspeaker provided by any one of the foregoing embodiments.

[0219] The display screen 10 and the rear shell are located on opposite sides of the middle frame 20, and the display screen 10, the middle frame 20, and the rear shell are sequentially snapped together to form an overall machine cavity.

[0220] The middle frame 20 includes a sound outlet hole 21, the loudspeaker is located in the overall machine cavity, and the outlet port 501 of the loudspeaker communicates with the sound outlet hole 21 to achieve sound diffusion.

[0221] For the electronic device provided by the embodiment of the present application, the loudspeaker adopted has a high effective sound radiation area, which can improve the external volume of the loudspeaker, and further improve the external volume of the electronic device.

[0222] It should be noted that those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include well-known knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope of the present application is pointed out by the following claims.

[0223] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A loudspeaker, characterized in that, include: A basin frame (100), and a magnetic circuit system (200) and a vibration system (300) connected to the basin frame (100), wherein the magnetic circuit system (200) is fixed to one end of the basin frame (100); The vibration system (300) comprises: A diaphragm (301), one end of the diaphragm (301) being fixed to the other end of the basin frame (100), and the diaphragm (301) protruding in the direction of the basin frame (100); The dome (302) comprises a first dome (3021) and a second dome (3022), wherein the first dome (3021) is located on a side of the diaphragm (301) away from the basin frame (100), and the second dome (3022) is arranged around a first surface of the first dome (3021), and the second dome (3022) is connected to the other end of the diaphragm (301); wherein the first surface faces the diaphragm (301); A voice coil (303) is fixed to the first surface of the first dome (3021) and is opposite to the magnetic circuit system (200); the voice coil (303) is configured to generate a magnetic field with the magnetic circuit system (200) to drive the first dome (3021) to vibrate and produce sound.

2. The loudspeaker according to claim 1, characterized in that The magnetic circuit system (200) comprises a magnetic conductive plate (201), a main magnetic component (202) and a plurality of auxiliary magnetic components (203); The magnetic conductive plate (201) is fixed to one end of the basin frame (100); The main magnetic component (202) and the plurality of secondary magnetic components (203) are fixed on the magnetic conductive plate (201) and are located in the receiving space of the basin frame (100); A plurality of the secondary magnetic components (203) are arranged around the main magnetic component (202), and each of the secondary magnetic components (203) has a magnetic gap with the main magnetic component (202); A portion of the voice coil (303) is suspended within the magnetic gap.

3. The loudspeaker according to claim 2, characterized in that The diaphragm (301) comprises a folded ring portion (3011), a first fixing portion (3012) located inside the folded ring portion (3011), and a second fixing portion (3013) located outside the folded ring portion (3011); The folding ring portion (3011) protrudes in the direction of the magnetic conductive plate (201), and a vibration gap is provided between the folding ring portion (3011) and the magnetic conductive plate (201).

4. The loudspeaker according to claim 3, characterized in that The first fixing portion (3012) is fixed to the other end of the basin frame (100); The folding ring portion (3011) and the second fixing portion (3013) are located outside the basin frame (100); The second fixing portion (3013) is connected to the second ball top (3022).

5. The loudspeaker according to claim 4, characterized in that The second fixing portion (3013) comprises a supporting portion (30131) and a resisting portion (30132); One end of the support portion (30131) is connected to the surround portion (3011), and the other end extends in a direction away from the surround portion (3011). The blocking portion (30132) is located on the surface of the support portion (30131) facing the first dome (3021), and is retracted a first distance relative to the other end of the support portion (30131).

6. The loudspeaker according to claim 5, wherein The second dome (3022) is connected to the peripheral edge of the first dome (3021); The second dome (3022) covers the outside of the blocking portion (30132) and abuts against the support portion (30131).

7. The loudspeaker according to claim 6, wherein The effective sound radiation area of the loudspeaker includes the area of the region surrounded by the position of the first dome (3021) opposite to the first position of the first fixing portion (3012); The first position is the position where the first fixing portion (3012) faces the outer surface of the chassis (100).

8. The loudspeaker according to claim 6, wherein Further comprising: a first sealing ring (401); The first sealing ring (401) is sleeved on the outside of the chassis (100) and abuts against the diaphragm (301) and the magnetic conductive plate (201) respectively to seal the vibration gap.

9. The loudspeaker according to claim 8, wherein The magnetic conductive plate (201) includes a plurality of first air vents (2011); The plurality of first air vents (2011) are opposite to the first sealing ring (401), and the first air vents (2011) are used for the air flow generated by the vibration of the diaphragm (301) to flow out to the external environment.

10. The loudspeaker according to claim 9, wherein The chassis (100) includes a plurality of first ventilation holes (101); The first ventilation holes (101) are opposite to the first sealing ring (401), and the first ventilation holes (101) communicate the vibration gap of the diaphragm (301) and the rear sound cavity of the loudspeaker; Wherein, the rear sound cavity is surrounded by the dome (302), the diaphragm (301), the chassis (100) and the magnetic circuit system (200).

11. The loudspeaker according to claim 3, wherein The second fixing portion (3013) is fixed to the other end of the chassis (100) and has a vibration gap with the first dome (3021); The surround portion (3011) and the first fixing portion (3012) are located inside the chassis (100); The first fixing portion (3012) is connected to the second dome (3022).

12. The loudspeaker according to claim 11, wherein The second dome (3022) is retracted a second distance relative to the edge of the first dome (3021); The chassis (100) is opposite to the edge of the first dome (3021).

13. The loudspeaker according to claim 12, wherein The second dome (3022) includes a plurality of second vent holes (3023); The plurality of second vent holes (3023) communicate with the rear sound cavity of the speaker, and the second vent holes (3023) are used for the airflow generated when the diaphragm (301) vibrates to flow out into the rear sound cavity; Wherein, the rear sound cavity is surrounded by the dome (302), the diaphragm (301), the chassis (100), and the magnetic circuit system (200).

14. The speaker according to claim 13, wherein It further includes: a second sealing ring (402); The second sealing ring (402) is sleeved on the outer side of the second dome (3022) and abuts against the diaphragm (301) and the first dome (3021) respectively to seal the vibration gap.

15. The speaker according to claim 9 or 14, wherein The effective sound radiation area of the speaker includes the surface area of the first dome (3021).

16. The speaker according to claim 1, wherein It further includes: a housing (500); The housing (500) covers the outer sides of the chassis (100), the magnetic circuit system (200), and the vibration system (300), and is fixed to the magnetic conductive plate (201) in the magnetic circuit system (200); The housing (500) and the second surface of the first dome (3021) enclose the front sound cavity of the speaker, and the second surface faces away from the first surface.

17. The speaker according to claim 16, wherein The housing (500) includes a sound outlet (501); The sound outlet (501) is located on the side wall of the housing (500), and the sound outlet (501) communicates with the front sound cavity.

18. An electronic device, characterized in that, It includes a display screen, a middle frame, a rear shell, and a speaker according to any one of claims 1-17; The display screen and the rear shell are located on opposite sides of the middle frame and are connected to the middle frame to enclose the whole machine cavity; The middle frame includes a sound outlet hole; The speaker is located in the whole machine cavity, and the sound outlet of the speaker communicates with the sound outlet hole.

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