A loudspeaker and electronic device

Abstract

The application relates to the technical field of terminal equipment, and discloses a loudspeaker and electronic equipment. The loudspeaker comprises a spider, and a magnetic circuit system and a vibration system connected with the spider, the magnetic circuit system being fixed to one end of the spider; the vibration system comprises a diaphragm, a ball top and a voice coil. One end of the diaphragm is fixed to the other end of the spider, and the diaphragm protrudes towards the direction of the spider; the ball top comprises a first ball top and a second ball top, the first ball top is located on the side of the diaphragm away from the spider, the second ball top is annularly arranged on the first surface of the first ball top, and the second ball top is connected with the other end of the diaphragm; the voice coil is fixed to the first surface of the first ball top 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 ball top to vibrate and sound. In this way, the ball top is divided into two parts, the diaphragm is used to transversely support the ball top, the shape of the ball top can be maximized, the area of the first ball top can be increased, and then the effective sound radiation area of the loudspeaker can be increased, so that the outdoor loudness can be increased.

Description

TECHNICAL FIELD

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

[0002] With the popularity of electronic devices (such as smart phones, tablet computers, smart wearable devices, etc.), the audio performance thereof has become one of the core indicators of user experience. At present, electronic devices generally have a micro loudspeaker built-in as a core component of acoustic output, which pushes air to generate sound waves through reciprocating vibration of a diaphragm, thereby realizing functions such as sound playing and calling.

[0003] The core structure of a loudspeaker includes a diaphragm, a voice coil, a magnetic circuit system, and a basket, etc. Among them, the diaphragm is a sound radiation component that directly drives air vibration, and the effective sound radiation area thereof is a key parameter that determines the sound loudness and frequency response characteristics. The effective sound radiation area refers to the effective area of the diaphragm that actually participates in sound wave radiation during vibration, which is determined by the geometric shape, material stiffness, and boundary fixing conditions of the diaphragm, etc.

[0004] In the loudspeaker assembly process, the edge of the diaphragm needs to be fixed with the basket through an adhesive, and in order to ensure the structural stability, the bonding width is large. In this way, the effective vibration area of the diaphragm will shrink towards the center, thereby reducing the effective sound radiation area and resulting in insufficient sound loudness of the loudspeaker. SUMMARY

[0005] The present application provides a loudspeaker and an electronic device to solve the problem of insufficient sound loudness caused by the small effective sound radiation area of the existing loudspeaker.

[0006] In a first aspect, the present application provides a loudspeaker, comprising: a basket, and a magnetic circuit system and a vibration system connected with the basket, the magnetic circuit system being fixed to one end of the basket; the vibration system comprising: a diaphragm, a ball top, and a voice coil. One end of the diaphragm is fixed to the other end of the basket, and the diaphragm protrudes towards the direction of the basket; the ball top comprises a first ball top and a second ball top, the first ball top being located on the side of the diaphragm away from the basket, and the second ball top being annularly arranged on a first surface of the first ball top, and the second ball top being connected with 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 ball top and 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 ball top to vibrate and sound.

[0007] The loudspeaker provided by the embodiments of the present application includes a first dome and a second dome, the first dome is connected to one end of a diaphragm through the second dome, and the other end of the diaphragm is connected to a frame. The first dome is bonded to a voice coil and vibrates to produce sound under the driving of the voice coil. In this way, the dome is located above the diaphragm, the diaphragm is used to support the dome laterally, and the shape of the dome can be maximized. The dome is divided into the first dome in the middle and the second dome of the outer edge ring, which can not only improve the reliability of the dome, but also increase the area of the first dome used for vibration and sound production. In addition, the bonding width of the diaphragm and the frame 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, thereby increasing the loudness of the loudspeaker.

[0008] In some implementations, the magnetic circuit system includes a magnetic conducting plate, a main magnetic piece and a plurality of auxiliary magnetic pieces; the magnetic conducting plate is fixed to one end of the frame; the main magnetic piece and the plurality of auxiliary magnetic pieces are fixed to the magnetic conducting plate and located in the receiving space of the frame; the plurality of auxiliary magnetic pieces are arranged around the main magnetic piece, and each auxiliary magnetic piece has a magnetic gap with the main magnetic piece; and 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, the voice coil is easily moved under the action of the strong magnetic field in the magnetic gap, and the dome is driven to produce large amplitude vibration, thereby improving the loudness of the loudspeaker.

[0009] In some implementations, the diaphragm includes a folded ring portion, a first fixed portion located inside the folded ring portion, and a second fixed portion located outside the folded ring portion; the folded ring portion protrudes towards the direction of the magnetic conducting plate, and the folded ring portion has a vibration gap with the magnetic conducting plate. In this way, the diaphragm can be used to support the dome laterally, and the vibration gap can be used to provide vibration space for the up-down vibration of the folded ring portion.

[0010] In some implementations, the first fixed portion is fixed to the other end of the frame; the folded ring portion and the second fixed portion are located outside the frame; and the second fixed portion is connected to the second dome. In this way, the diaphragm is fixed outside the frame, the second fixed portion of the diaphragm is connected to the dome in a clamping manner, the folded ring portion of the diaphragm is retracted below the dome, the diaphragm supports the dome laterally, can keep the dome centered, limit the lateral displacement of the dome, and provide elastic restoring force, so as to ensure the linear motion of the dome in the up-down direction.

[0011] In some implementations, the second fixed portion includes a supporting portion and a resisting portion; one end of the supporting portion is connected to the folded ring portion, and the other end extends away from the folded ring portion; and the resisting portion is located on the surface of the supporting portion facing the first dome and is retracted by a first distance relative to the other end of the supporting portion. In this way, a clamping space can be formed outside the resisting portion and the supporting portion, the outer side of the diaphragm is connected to the edge of the second dome, and the reliability of the diaphragm and the dome can be improved.

[0012] In some implementations, the second dome is connected to a peripheral edge of the first dome; and the second dome cover is arranged outside the resisting part and abuts against the supporting part. In this way, a dome structure can be provided, which is formed by two parts, and the stability of the dome can be improved, and the up-down reciprocating movement can be realized.

[0013] In some implementations, the effective sound radiation area of the loudspeaker includes an area of a region surrounded by a position of the first dome opposite to a first position of the first fixing part; and the first position is a position of the first fixing part opposite to an outer surface of the frame. In this way, the effective sound radiation area of the loudspeaker can be improved.

[0014] In some implementations, the loudspeaker further includes a first sealing ring; the first sealing ring is sleeved outside the frame and abuts against the diaphragm and the magnetic plate respectively to seal the vibration gap. In this way, the vibration gap between the diaphragm and the magnetic plate can be sealed by the first sealing ring, the sound wave path from the back of the diaphragm to the front sound cavity is completely isolated, the phase cancellation between the sound wave from the back of the diaphragm and the sound wave from the front is avoided, the sound energy loss is reduced, and the effective sound radiation area is improved.

[0015] In some implementations, the magnetic plate includes a plurality of first air release holes; the plurality of first air release holes are opposite to the first sealing ring, and the first air release holes are used for air flow generated by the vibration of the diaphragm to flow out to the external environment. In this way, when the diaphragm vibrates, the air flow exchange through the first air release holes ensures the air conduction between the back of the diaphragm and the external environment, the air pressure fluctuation during the vibration of the diaphragm is balanced, the air spring rigidity caused by complete sealing is avoided, and the air spring effect is reduced.

[0016] In some implementations, the frame includes a plurality of first air holes; the first air holes are opposite to the first sealing ring, and the first air holes are connected to the vibration gap of the diaphragm and the back sound cavity of the loudspeaker; and the back sound cavity is surrounded by the dome, the diaphragm, the frame and the magnetic circuit system. In this way, the sound wave from the back of the diaphragm can be directed to the back sound cavity through the first air holes, instead of irregular leakage, which not only avoids air flow disturbance and affects the effective sound radiation area, but also reduces turbulent noise to improve the volume clarity.

[0017] In some implementations, the second fixing part is fixed to the other end of the frame and has a vibration gap with the first dome; the folded ring part and the first fixing part are located inside the frame; and the first fixing part is connected to the second dome. In this way, the diaphragm is located in the accommodation space of the frame, the sound wave from the back of the diaphragm is directly connected to the back sound cavity of the loudspeaker, the sound wave from the diaphragm to the front sound cavity is avoided, and the phase cancellation between the sound wave from the back of the diaphragm and the sound wave from the front is avoided, thereby reducing the sound energy loss, and the effective sound radiation area and the sound pressure level can be improved to improve the loudness of the external speaker.

[0018] In some implementations, the second dome is recessed by a second distance relative to an edge of the first dome; and the spider is opposite the edge of the first dome. In this way, another structure of the dome can be provided, and the dome is formed by two parts, which can not only improve the stability of the dome, but also realize the reciprocating movement of the upper and lower parts.

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

[0020] In some implementations, the loudspeaker 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, force the air pushed by the diaphragm to enter the rear sound cavity through the second vent holes, so as to avoid the phase cancellation of the sound waves generated by the diaphragm and the sound waves in the front direction, thereby reducing the sound energy loss, increasing the effective sound radiation area and the low-frequency sound pressure level, and improving the loudness of the sound.

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

[0022] In some implementations, the loudspeaker further includes a housing; the housing is sleeved on the outside of the spider, the magnetic circuit system, and the vibration system, and is fixed to the magnetic conductive plate in the magnetic circuit system; and the housing and a second surface of the first dome surround a front sound cavity of the loudspeaker, and the second surface is opposite the first surface. In this way, the housing can protect the internal structure of the loudspeaker, and can also surround the front sound cavity to diffuse the sound waves in a specific direction.

[0023] In some implementations, the housing includes a sound outlet; the sound outlet is located on a side wall of the housing, and the sound outlet is in communication with the front sound cavity. In this way, the sound waves generated by the vibration of the first dome can be diffused by the side surface of the loudspeaker to realize side sound emission.

[0024] In a second aspect, the present application provides an electronic device, which includes a display screen, a middle frame, a rear shell, and a loudspeaker 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 surround a whole machine cavity; the middle frame includes a sound outlet; and the loudspeaker is located in the whole machine cavity, and a sound outlet of the loudspeaker is in communication with the sound outlet.

[0025] The electronic device provided by the embodiment of the present application has a high effective sound radiation area of the loudspeaker, which can improve the loudness of the loudspeaker and the loudness of the electronic device. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, other drawings can also be obtained by those skilled in the art without any creative effort based on these drawings.

[0027] Figure 1 Fig. 1 is a structural schematic diagram of an electronic device provided by the embodiment of the present application;

[0028] Figure 2 Fig. 2 is a structural schematic diagram of a loudspeaker assembly;

[0029] Figure 3 Fig. 3 is a structural schematic diagram of a loudspeaker provided by the embodiment of the present application; Figure 2 Fig. 4 is a structural schematic diagram of an A-A section in Fig. 3;

[0030] Figure 4 Fig. 5 is a first exploded structural schematic diagram of a loudspeaker provided by the embodiment of the present application;

[0031] Figure 5 Fig. 6 is a first structural schematic diagram of a loudspeaker provided by the embodiment of the present application;

[0032] Figure 6 Fig. 7 is a structural schematic diagram of a B-B section in Fig. 6; Figure 5

[0033] Fig. 8 is a first top view structural schematic diagram of a magnetic circuit system and a voice coil provided by the embodiment of the present application; Figure 7

[0034] Fig. 9 is a first structural schematic diagram of a diaphragm provided by the embodiment of the present application; Figure 8

[0035] Fig. 10 is a first structural schematic diagram of a dome provided by the embodiment of the present application; Figure 9

[0036] Fig. 11 is a first local structural schematic diagram of a dome and a diaphragm at a connecting position provided by the embodiment of the present application; Figure 10

[0037] Fig. 12 is a structural schematic diagram of a magnetic circuit system and a voice coil provided by the embodiment of the present application; Figure 11

[0038] Fig. 13 is a schematic diagram of an effective sound radiation area of a loudspeaker provided by the embodiment of the present application; Figure 12

[0039] Figure 13 ​Figure 2 is a second structural schematic diagram of a loudspeaker provided by an embodiment of the present application;

[0040] Figure 14 Figure 3 is a structural schematic diagram of a C-C section in Figure 2; Figure 13

[0041] Figure 15 Figure 4 is a second exploded structural schematic diagram of a loudspeaker provided by an embodiment of the present application;

[0042] Figure 16 Figure 5 is a third structural schematic diagram of a loudspeaker provided by an embodiment of the present application;

[0043] Figure 17 Figure 6 is a structural schematic diagram of a D-D section in Figure 5; Figure 16

[0044] Figure 18 Figure 7 is a second top structural schematic diagram of a magnetic circuit system and voice coil provided by an embodiment of the present application;

[0045] Figure 19 Figure 8 is a structural schematic diagram of a basket provided by an embodiment of the present application;

[0046] Figure 20 Figure 9 is a structural schematic diagram of an E-E section in Figure 8; Figure 16

[0047] Figure 21 Figure 10 is a fourth structural schematic diagram of a loudspeaker provided by an embodiment of the present application;

[0048] Figure 22 Figure 11 is a structural schematic diagram of an F-F section in Figure 10; Figure 21

[0049] Figure 12 is a third exploded structural schematic diagram of a loudspeaker provided by an embodiment of the present application; Figure 23

[0050] Figure 24 Figure 13 is a second structural schematic diagram of a diaphragm provided by an embodiment of the present application;

[0051] Figure 25 Figure 14 is a fifth structural schematic diagram of a loudspeaker provided by an embodiment of the present application;

[0052] Figure 26 Figure 15 is a structural schematic diagram of a G-G section in Figure 14; Figure 25

[0053] Figure 27 Figure 16 is a second structural schematic diagram of a dome provided by an embodiment of the present application;

[0054] Figure 28 Figure 17 is a second local structural schematic diagram of a dome and diaphragm at a connection provided by an embodiment of the present application; ​​​​​

[0055] Figure 29 Fig. 6 is a sixth structural schematic diagram of a loudspeaker provided by an embodiment of the present application.

[0056] Fig. 6 is a sixth structural schematic diagram of a loudspeaker provided by an embodiment of the present application.

[0057] 10 - display screen, 20 - middle frame, 21 - sound hole, 30 - loudspeaker assembly, 31 - spider structure, 32 - diaphragm structure, 321 - folded ring area, 33 - dome structure, 34 - voice coil structure, 35 - permanent magnet, 351 - central permanent magnet, 352 - side permanent magnet, 36 - central dust cap, 37 - side dust cap, 38 - lower dust cap;

[0058] 100 - spider, 101 - first air hole;

[0059] 200 - magnetic circuit system, 201 - magnetic conducting plate, 2011 - first air hole, 2012 - second air hole, 202 - main magnetic part, 2021 - main permanent magnet, 2022 - main magnetic conducting ring, 203 - auxiliary magnetic part, 2031 - auxiliary permanent magnet, 2032 - auxiliary magnetic conducting ring;

[0060] 300 - vibration system, 301 - diaphragm, 3011 - folded ring part, 3012 - first fixed part, 3013 - second fixed part, 30131 - support part, 30132 - blocking part, 302 - dome, 3021 - first dome, 3021a - first surface, 3021b - second surface, 3022 - second dome, 3023 - second air hole, 303 - voice coil;

[0061] 401 - first sealing ring, 402 - second sealing ring;

[0062] 500 - shell, 501 - sound outlet. DETAILED DESCRIPTION

[0063] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0064] In the description of the present application, the terms "first", "second", and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second", and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0065] In addition, in this application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they can change accordingly according to changes in the orientation of the components in the drawings.

[0066] The electronic devices described in the embodiments of the present application include but are not limited to mobile phones, notebook computers, tablet computers, laptop computers, personal digital assistants, or wearable devices, etc. The following description will be made using a mobile phone as the electronic device.

[0067] Figure 1 It is a structural diagram of an electronic device provided in an embodiment of the present application.

[0068] like Figure 1 As shown, the electronic device may include a display screen 10, a middle frame 20, and a rear housing. The display screen 10 and the rear housing are located on opposite sides of the middle frame 20. The display screen 10, the middle frame 20, and the rear housing are sequentially fastened together to form a complete housing. The housing includes components such as a communication module, a circuit board, a battery, a speaker assembly, and a camera assembly, which are not listed here.

[0069] The speaker assembly, commonly known as a speaker, is a transducer device that converts electrical signals into sound waves. As a core component of acoustic output, the speaker assembly can enable electronic devices to have audio performance to improve the user experience. The speaker assembly can be a built-in micro speaker that pushes the air to generate sound waves through the reciprocating vibration of the diaphragm, thereby achieving functions such as sound playback and calls. The middle frame 20 is provided with a sound outlet 21 for diffusing the sound output by the speaker assembly.

[0070] To facilitate the explanation of the positions of various components in an electronic device, an embodiment of the present application exemplarily establishes a three-dimensional coordinate system based on the electronic device, wherein 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.

[0071] Figure 2 It is a structural diagram of a loudspeaker assembly; Figure 3 yes Figure 2 Schematic diagram of the structure of the AA section.

[0072] like Figure 2 and Figure 3 As shown, the core structure of speaker assembly 30 can be divided into three major parts: the frame structure 31, the vibration system, and the magnetic circuit system, supplemented by other auxiliary structures. The vibration system includes the diaphragm structure 32, the dome structure 33, and the voice coil structure 34. The magnetic circuit system includes the permanent magnet 35, the center washer 36, the side washers 37, and the lower washer 38.

[0073] The permanent magnet 35 is fixed above the lower pot 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 are arranged around the center permanent magnet 351, and each side permanent magnet 352 has a magnetic gap L0 with the center permanent magnet 351. The center pot 36 is arranged above the center permanent magnet 351. The side pot 37 is a plurality of side pots and is arranged one-to-one above the plurality of side permanent magnets 352. The yoke structure 31 is fixedly connected above the side permanent magnet 352, and the side pot 37 is fixed to the yoke structure 31. The diaphragm structure 32 covers the yoke structure 31 and is bonded to the yoke structure 31. The dome structure 33 is arranged in the center region of the diaphragm structure 32, so that the diaphragm structure 32 forms a folded ring region 321 between the yoke structure 31 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.

[0074] It should be noted that the dome structure 33 can be a form of the diaphragm, and the dome structure 33 and the diaphragm structure 32 can be collectively referred to as the diaphragm.

[0075] The yoke structure 31 is used to support the framework of the entire loudspeaker assembly 30, to ensure accurate alignment of each component, and to provide mechanical stability. 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, which interacts with the magnetic circuit system to drive the diaphragm structure 32 to vibrate. The permanent magnet 35 (center permanent magnet 351 and side permanent magnet 352) is used to provide a constant magnetic field that interacts with the alternating magnetic field of the voice coil structure 34 to generate a driving force. The center pot 36 is a magnetic core that is used to concentrate the magnetic flux of the permanent magnet 35 to the magnetic gap L0. The side pot 37 is an external magnetic component that cooperates with the center pot 36 to form a closed magnetic circuit, thereby enhancing the magnetic field strength of the magnetic gap L0. The lower pot 38 is a magnetic circuit bottom magnetic plate that cooperates with the center pot 36 and the side pot 37 to form a magnetic circuit.

[0076] Other auxiliary structures include a dust cover, a terminal, and a phase plug, and the corresponding structures are not shown in the figure. The dust cover is used to cover the center of the diaphragm structure 32 to prevent foreign matter from entering the magnetic gap L0. The terminal is welded to the metal contact on the yoke structure 31, and connects the lead wire of the voice coil structure 34 to the external circuit. The phase plug is used to optimize the sound wave propagation path and reduce high-frequency distortion.

[0077] The sound production principle (electric-magnetic-acoustic conversion process) of the loudspeaker assembly 30 includes: (1) magnetic field establishment: the center permanent magnet 351 forms a closed magnetic circuit through the center bobbin 36, the side bobbin 37, and the lower bobbin 38, and the magnetic field strength is the highest at the magnetic gap L0 (the position of the voice coil structure 34). (2) Electric signal input: the audio current passes through the voice coil structure 34 to generate an alternating magnetic field. (3) Lorentz force driving: 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 the Fleming 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).

[0078] The diaphragm structure 32 is a sound radiation component for directly driving air vibration, and its effective sound radiation area (Sd) is a key parameter for determining the sound loudness and frequency response characteristics of the loudspeaker assembly 30. The effective sound radiation area (Sd) refers to the effective area of the diaphragm structure 32 that actually participates in sound wave radiation during vibration, and its value is determined by the geometric shape, material stiffness, and boundary fixation conditions of the diaphragm structure 32.

[0079] 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) is improved, especially in the low frequency band, which can significantly improve the fullness and dynamic range of the sound. The sound pressure level represents the instantaneous pressure change (relative to static pressure) of the sound wave in the air, and the unit is decibel (dB). The sound pressure level is used to describe the size of the sound pressure and to quantify the loudness of the sound.

[0080] It can be understood that the larger the Sd of the diaphragm structure 32, the stronger the low frequency response (such as a bass speaker requiring 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.

[0081] In the assembly process of the loudspeaker assembly 30, the edge of the diaphragm structure 32 needs to be fixed to the basket structure 31 by an adhesive. To ensure the stability of the structure, the bonding width W1 of the diaphragm structure 32 and the basket structure 31 is greater than or equal to 0.4 mm, and to ensure the waterproof requirement, the bonding width W1 needs to be greater than or equal to 0.5 mm. However, too large a 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 overhang of the diaphragm structure 32, the lower the Sd of the diaphragm structure 32. The overhang refers to the part of the diaphragm structure 32 that is bonded to the basket structure 31.

[0082] Meanwhile, since the dome structure 33 is connected to the frame structure 31 through the folded ring area 321, when vibrating up and down, the part of the folded ring area 321 connected to the dome structure 33 vibrates synchronously with the dome structure 33, while the part of the folded ring area 321 connected to the frame structure 31 is pulled by the frame structure 31 and does not vibrate, losing part of the vibrating area. Thus, it will further cause the effective vibrating area of the diaphragm structure 32 to shrink towards the center.

[0083] Therefore, the effective vibrating area of the diaphragm structure 32 is the area surrounded by the middle part of the folded ring area 321, and the effective vibrating area is smaller than the total area of the diaphragm structure 32. Thus, the effective sound radiation area Sd0 of the loudspeaker assembly 30 is the area of the area surrounded by the middle part of the folded ring area 321, and the effective sound radiation area Sd0 is low, which will cause the loudspeaker assembly 30 to be insufficient in sound loudness.

[0084] In addition, if the precision of the bonding process is insufficient, it may cause the diaphragm structure 32 to deform or the stress distribution to be uneven, further weakening the acoustic performance. Therefore, how to maximize the effective sound radiation area under the premise of ensuring the reliability of the structure to improve the performance of the loudspeaker.

[0085] To solve the above technical problems, the embodiments of the present application provide a loudspeaker, which changes the dome structure and the connection mode of the diaphragm and the frame to increase the effective sound radiation area of the loudspeaker, and thus improve the outdoor loudness of the loudspeaker.

[0086] Figure 4 is the first exploded structure schematic diagram of the loudspeaker provided by the embodiments of the present application.

[0087] As shown in Figure 4 some embodiments, the loudspeaker provided by the embodiments of the present application includes a frame 100, and a magnetic circuit system 200 and a vibrating system 300 connected to the frame 100.

[0088] The magnetic circuit system 200 can include a magnetic conducting plate 201, a main magnetic part 202 and a secondary magnetic part 203, etc., and the vibrating system 300 can include a diaphragm 301, a dome 302 and a voice coil 303, etc.

[0089] The frame 100 is used to support the skeleton of the entire loudspeaker, ensure the accurate alignment of each component, and provide mechanical stability. The frame 100 is usually made of metal (aluminum alloy, steel) or high-strength plastic, and has a ring structure. The center of the frame 100 has a receiving space (not shown in the figure) for installing the magnetic circuit system 200.

[0090] The diaphragm 301 is used to keep the dome 302 centered, can limit the lateral displacement of the dome 302, and provide elastic restoring force. The material of the diaphragm 301 includes pulp, polypropylene, metal (aluminum, titanium) or composite material, etc.

[0091] The dome 302 is used to directly push 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 vibration sound generation by the dome 302, and the effective vibration area of the dome 302 determines the effective sound radiation area of the loudspeaker, which has a positive correlation characteristic. The effective vibration area refers to the area of the effective region of the dome 302 actually participating in sound wave radiation during vibration.

[0092] The voice coil 303 is used to generate an alternating magnetic field after being energized, interacts with the magnetic circuit system 200, and drives the dome 302 to vibrate and sound. The voice coil 303 is a coil of copper or aluminum wire wound on the high-temperature-resistant dome 302 and suspended in the magnetic gap of the magnetic circuit system 200.

[0093] The main magnetic member 202 includes a main permanent magnet 2021 and a main magnetic ring 2022. The main permanent magnet 2021 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 main magnetic ring 2022 can be used as a center yoke and a magnetic core, and is used to concentrate the magnetic flux of the main permanent magnet 2021 to the magnetic gap.

[0094] The auxiliary magnetic member 203 includes an auxiliary permanent magnet 2031 and an auxiliary magnetic 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 ring 2032 can be used as a side yoke and an outer magnetic component, and is used to cooperate with the main magnetic ring 2022 to form a closed magnetic circuit and enhance the magnetic field strength of the magnetic gap.

[0095] It should be noted that the main permanent magnet 2021 and the auxiliary permanent magnet 2031 are both 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 (economic type) or aluminum nickel cobalt, etc.

[0096] The magnetic plate 201 can be used as a lower yoke at the bottom of the magnetic circuit system 200, which is used to jointly form a magnetic circuit with the main magnetic ring 2022 of the main magnetic member 202 and the auxiliary magnetic ring 2032 of the auxiliary magnetic member 203.

[0097] Figure 5 is the first structural schematic diagram of the loudspeaker provided by the embodiments of the present application; Figure 6 is Figure 5 is a structural schematic diagram of section B-B in FIG. 1, Figure 5 (a) and (b) show the structure of the loudspeaker from different angles, Figure 5 (b) does not show the structure of the dome 302.

[0098] As Figure 5 (a), (b) andFigure 6 As shown, in some embodiments, the magnetic circuit system 200 is fixed to one end of the basin frame 100. The magnetic circuit system 200 may include a magnetic conductive plate 201, a main magnetic component 202 and a plurality of auxiliary magnetic components 203.

[0099] 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 .

[0100] Figure 7 This is the first top view structural diagram of the magnetic circuit system and voice coil provided in the embodiment of the present application.

[0101] like Figure 7 As shown, in some embodiments, a plurality of secondary magnetic members 203 are disposed around the main magnetic member 202 , and the number of the secondary magnetic members 203 is the same as the number of polygonal sides of the main magnetic member 202 .

[0102] For example, the cross-section of the main magnetic member 202 is rectangular, and the number of the secondary magnetic members 203 is four, two of which are arranged on the long sides of the main magnetic member 202, and the other two are arranged on the short sides of the main magnetic member 202. The length of the secondary magnetic member 203 is adapted to the long side or the short side of the main magnetic member 202.

[0103] Each secondary magnetic element 203 is spaced apart from the primary magnetic element 202, with a magnetic gap L0 between each secondary magnetic element 203 and the primary magnetic element 202 to ensure uniform magnetic field distribution. For example, the width of the magnetic gap L0 is approximately 0.5 mm to 2 mm. A smaller magnetic gap L0 improves magnetic field uniformity and reduces distortion.

[0104] Figure 8 This is the first structural diagram of the diaphragm provided in the embodiment of the present application. Figure 8 (a) shows the surface structure of the diaphragm 301 facing away from the magnetic plate 201. Figure 8 (b) shows the surface structure of the diaphragm 301 facing the magnetic guide plate 201. Figure 8 Middle (c) shows the side view structure of the diaphragm 301 .

[0105] Combine Figure 6 and Figure 8 As shown in (a), (b), and (c), in some embodiments, the diaphragm 301 is fixed to the other end of the basin frame 100 , and the diaphragm 301 and the magnetic conductive plate 201 are fixed to opposite ends of the basin frame 100 .

[0106] One end of the diaphragm 301 can be fixedly connected to the yoke 100 by an adhesive, and the other end of the diaphragm 301 extends away from the yoke 100 and is located outside the accommodating space of the yoke 100.

[0107] The diaphragm 301 protrudes in the direction of the yoke 100 along the z-axis direction to provide elastic restoring force when vibrating, drive the dome 302 to return to the initial position, and realize up-down vibration.

[0108] The diaphragm 301 can include a folded ring portion 3011, a first fixed portion 3012 located inside the folded ring portion 3011, and a second fixed portion 3013 located outside the folded ring portion 3011.

[0109] The folded ring portion 3011 protrudes in the direction of the magnetic plate 201 along the z-axis direction, and the main restoring force of the vibration system 300 is provided by the folded ring portion 3011 which is inwardly retracted. The folded ring portion 3011 and the magnetic plate 201 have a vibration gap (not shown in the figure) therebetween to provide a vibration space for the up-down vibration of the folded ring portion 3011.

[0110] The first fixed portion 3012 and the second fixed portion 3013 extend along the x-axis or y-axis direction, and the surface of the first fixed portion 3012 and the surface of the second fixed portion 3013 can be coplanar.

[0111] In some embodiments, the first fixed portion 3012 is fixed to the other end of the yoke 100 away from the magnetic plate 201, the folded ring portion 3011 and the second fixed portion 3013 are located outside the accommodating space of the yoke 100, and the second fixed portion 3013 is connected to the dome 302.

[0112] In this way, the folded ring portion 3011 of the diaphragm 301 can be retracted below the dome 302, the bonding width of the diaphragm 301 and the yoke 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 increase the effective sound radiation area of the loudspeaker.

[0113] The dome 302 and the second fixed portion 3013 of the diaphragm 301 are fixed in a clamping manner. Correspondingly, the second fixed portion 3013 can include a support portion 30131 and a blocking portion 30132.

[0114] One end of the support portion 30131 is connected to the folded ring portion 3011, and the other end extends away from the folded ring portion 3011; the surface of the support portion 30131 and the surface of the first fixed portion 3012 can be coplanar.

[0115] The resisting portion 30132 is located on the surface of the supporting portion 30131 facing the dome 302, and the extending direction of the resisting portion 30132 is perpendicular to the extending direction of the supporting portion 30131. The resisting portion 30132 is arranged in a staggered manner with the edge of the supporting portion 30131, and the resisting portion 30132 is recessed by a first distance L1 relative to the edge of the supporting portion 30131.

[0116] In this way, the clamping space can be formed on the outer side of the resisting portion 30132 and the supporting portion 30131, which facilitates subsequent clamping with the dome 302.

[0117] Figure 9 FIG. 1 is a first structural schematic diagram of the dome provided by the present application. In FIG. 1, Figure 9 FIG. 1(a) shows the surface structure of the dome 302 away from the diaphragm 301, Figure 9 FIG. 1(b) shows the surface structure of the dome 302 facing the diaphragm 301.

[0118] In combination with Figure 6 and Figure 9 As shown in FIGS. 1(a) and 1(b), in some embodiments, the dome 302 is located on the side of the diaphragm 301 away from the basket 100 and is connected with the diaphragm 301.

[0119] In this way, the dome 302, the diaphragm 301, the basket 100 and the magnetic circuit system 200 enclose the rear sound cavity (not shown in the figure) of the loudspeaker. The rear sound cavity is used for low-frequency tuning (through the cavity volume and the air leakage hole / reversed phase tube design, the lower limit of low frequency is expanded), air pressure balance (buffering the air compression of the rearward movement of the dome 302, reducing the nonlinear distortion), suppressing sound short circuit (isolating the sound wave behind the dome 302, avoiding cancellation with the forward sound wave), etc.

[0120] The dome 302 is a frame body with an opening at one end, and the outer dimensions of the dome 302 are in a similar relationship with the outer dimensions of the loudspeaker. In this way, the size of the dome 302 can be increased, so that the dome 302 has a large plane, so as to improve the effective sound radiation area.

[0121] The dome 302 can include a first dome 3021 and a second dome 3022. The first dome 3021 is a plate structure, and the first dome 3021 includes first and second surfaces 3021a and 3021b facing away from each other; both the first and second surfaces 3021a and 3021b are large planes, the first surface 3021a faces the diaphragm 301, and the second surface 3021b faces away from the diaphragm 301.

[0122] The second dome 3022 is a ring structure, wherein the cross section of the second dome 3022 can be a plate structure, such as a “|” shape, or a bent structure, such as an “L” shape.

[0123] The second dome 3022 is annularly arranged on the first surface 3021a of the first dome 3021, and is connected to the four peripheral edges of the first dome 3021.

[0124] When the cross section of the second dome 3022 is a plate structure, the extension direction of the second dome 3022 is perpendicular to the extension direction of the first dome 3021. For example, 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.

[0125] When the cross section of the second dome 3022 is a bending 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.

[0126] The dome 302 is assembled on the diaphragm 301 in a state that the second dome 3022 faces the diaphragm 301, and the first dome 3021 is located on the side of the diaphragm 301 away from the frame 100, and the second dome 3022 is connected to the second fixed part 3013 of the diaphragm 301.

[0127] In this way, the diaphragm 301 transversely supports the dome 302, can keep the dome 302 centered, limit the transverse 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 elastic restoring force to the dome 302 to ensure linear motion of the dome 302 in the up-down direction.

[0128] In some embodiments, the first dome 3021 and the second dome 3022 can be connected by bonding, or can be integrally formed. The dome 302 is formed by two parts, which not only can improve the stability of the dome 302, but also can realize the reciprocating motion in the up-down direction.

[0129] The thickness H0 of the first dome 3021 and the second dome 3022 can be very thin to reduce the size of the loudspeaker. For example, the thickness H0 of 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 adopt a light and thin metal material with good rigidity, which not only can improve the reliability, but also can reduce the cost.

[0130] Figure 10 is a first partial structure schematic view of the dome and the diaphragm provided by the embodiments of the present application at the connection.

[0131] As Figure 10As shown, in some embodiments, when the dome 302 is fixed to the diaphragm 301 in a clamping manner, the dome 302 is arranged outside the second fixed part 3013 of the diaphragm 301, and the first fixed part 3012 of the diaphragm 301 is bonded to the yoke 100.

[0132] The second dome 3022 is arranged outside the resisting part 30132 of the second fixed part 3013 and located in the clamping space formed by the outside of the resisting part 30132 and the supporting part 30131. The inner side surface of the second dome 3022 abuts against the outer surface of the resisting part 30132, and the end of the second dome 3022 abuts against the supporting part 30131.

[0133] For example, the second dome 3022 and the second fixed part 3013 of the diaphragm 301 can be connected by an adhesive, or the second dome 3022 and the second fixed part 3013 of the diaphragm 301 can be integrally formed.

[0134] In this way, the outer side of the diaphragm 301 is connected with the second dome 3022 in a wrapped manner, which can improve the reliability of the diaphragm 301 and the dome 302.

[0135] Figure 11 FIG. 1 is a structural schematic diagram of a magnetic circuit system and a voice coil provided by an embodiment of the present application.

[0136] In 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 opposite to the magnetic circuit system 200. The voice coil 303 is configured to generate a magnetic field effect with the magnetic circuit system 200 to drive the first dome 3021 to vibrate and produce sound.

[0137] The voice coil 303 is located above the main magnetic part 202 and the auxiliary magnetic part 203, and a part of the voice coil 303 is suspended in the magnetic gap L0.

[0138] In some embodiments, the main magnetic part 202 can include a main permanent magnet 2021 and a main flux guide ring 2022, and the auxiliary magnetic part 203 can include an auxiliary permanent magnet 2031 and an auxiliary flux guide ring 2032.

[0139] The main permanent magnet 2021 and the auxiliary permanent magnet 2031 are both located on the flux plate 201. The main flux guide ring 2022 is located at the end of the main permanent magnet 2021 away from the flux plate 201, and the auxiliary flux guide ring 2032 is located at the end of the auxiliary permanent magnet 2031 away from the flux plate 201.

[0140] The main permanent magnet 2021 is clamped between the main magnetic guide ring 2022 and the magnetic guide plate 201 to form a closed magnetic circuit; the auxiliary permanent magnet 2031 is clamped between the auxiliary magnetic guide ring 2032 and the magnetic guide plate 201 to form a closed magnetic circuit. The main magnetic guide ring 2022, the auxiliary magnetic guide ring 2032 and the magnetic guide plate 201 concentrate the magnetic field to the magnetic gap L0 to enhance the magnetic field strength of the magnetic gap L0.

[0141] In this way, the magnetic field strength at the magnetic gap L0 is the highest, facilitating the movement of the voice coil 303 in the magnetic gap L0 under the action of a strong magnetic field, and further driving the ball top 302 to produce a large amplitude of vibration to improve the sound loudness of the loudspeaker.

[0142] The sound generation principle (electric-force-acoustic conversion process) of the loudspeaker includes: (1) electric 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 a Lorentz force, wherein the direction of the Lorentz force can be determined according to the Fleming left-hand rule, and the principle of the Fleming left-hand rule includes: the left hand is flat, the palm is directed to the magnetic field direction (N→S); the four fingers are directed to the current direction (the direction of the flow of positive charges); the thumb direction is the force direction of the conductor. (3) vibration transmission: the voice coil 303 is driven to drive the first ball top 3021 to move up and down reciprocally, and the vibration frequency is consistent with the input electric signal. (4) sound wave radiation: the first ball top 3021 pushes the air around it to form a dense and sparse wave (sound wave) and propagates as audible sound.

[0143] During the vibration process, the diaphragm 301 is fixed to the outside of the basket 100 and supports the ball top 302 transversely. When the first ball top 3021 is driven upward by the voice coil 303, the first ball top 3021 is pulled by the second ball top 3022 through the diaphragm 301, and the diaphragm 301 provides a restoring force to the first ball top 3021 to make the first ball top 3021 return to the initial position downward.

[0144] In this way, the first ball top 3021 moves up and down reciprocally under the action of the voice coil 303 and the diaphragm 301, pushes the air around it to form a dense and sparse wave (sound wave) and propagates as audible sound. Moreover, the diaphragm 301 can keep the ball top 302 centered, can limit the transverse displacement of the ball top 302, and provide an elastic restoring force to make the ball top 302 move linearly in the up-down direction.

[0145] It should be noted that the size and direction of the audio current input to the voice coil 303 can be adjusted to change the size and direction of the magnetic field, and then the voice coil 303 generates vibrations of different degrees to drive the first ball top 3021 to generate vibrations of different degrees to produce sounds of different loudness.

[0146] The loudspeaker provided by the embodiments of the present application converts electric energy into sound energy efficiently through the precise cooperation of the magnetic circuit system 200 and the vibration system 300. The frame 100 provides structural support, and the linkage of the voice coil 303, the dome 302 and the diaphragm 301 realizes precise vibration, and finally the sound is transmitted through the air.

[0147] Referring again to Figure 7 As shown in the foregoing description, in some embodiments, the magnetic conductive plate 201 includes a plurality of second air release holes 2012, which are formed through the upper and lower surfaces of the magnetic conductive plate 201 to communicate the rear sound cavity of the loudspeaker with the external environment, so as to ensure the air around the voice coil 303 to be communicated with the external environment, to balance the air pressure and reduce the air spring effect.

[0148] When the dome 302 vibrates forward and backward (up and down), the closed air cavity behind the magnetic circuit system 200 is compressed or expanded. If the air cannot flow, the air pressure in the cavity will form a similar “spring” reaction force, which will hinder the free movement of the dome 302. By opening the second air release hole 2012 on the magnetic conductive plate 201, the air pressure inside and outside the magnetic circuit system 200 can be balanced through the second air release hole 2012, the air spring effect can be weakened, the movement of the dome 302 can be more linear, and the distortion can be reduced. In addition, the sound waves generated below the dome 302 are guided out through the second air release hole 2012, which avoids phase cancellation with the sound waves above (especially in the low frequency band), and reduces the loss of sound energy.

[0149] The size of the second air release hole 2012 can be adjusted according to the actual application, and by adjusting the size of the second air release hole 2012, the acoustic impedance of the low frequency band can be optimized, and the sound pressure level of 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 to the driving signal of the voice coil 303 more quickly, and the dynamic performance can be improved.

[0150] It should be noted that the second air release hole 2012 can also realize the heat dissipation function, which can discharge the heat generated by the voice coil 303 due to the passage of current to the external environment, delay the temperature rise of the voice coil 303, and further avoid damage caused by the excessive temperature in the magnetic circuit system 200.

[0151] In some embodiments, the plurality of second air release holes 2012 are symmetrically and uniformly distributed relative to the voice coil 303, and the plurality of second air release holes 2012 are formed at positions corresponding to each corner of the voice coil 303 on the magnetic conductive plate 201. For example, the voice coil 303 includes four corners, and the number of second air release holes 2012 is also four.

[0152] When the voice coil 303 moves axially (up and down) in a magnetic field, its cross-sectional shape (typically rectangular or racetrack-shaped) causes uneven air flow within the magnetic circuit cavity. The four corners represent the geometric extremes of the voice coil 303's cross-section, where airflow velocity is highest. Therefore, second air vents 2012 are symmetrically positioned on the magnetic plate 201, opposite the four corners of the voice coil 303. This balances airflow and prevents localized eddies or pressure concentrations.

[0153] In this way, it can be ensured that the air compression / expansion in the rear sound cavity will not produce pressure difference in different phases, so that the dome 302 can be evenly driven by the driving force from the voice coil 303, ensuring the accuracy of the up and down reciprocating motion of the dome 302, and thus ensuring the sound quality of the speaker.

[0154] Figure 12 Schematic diagram of the effective sound radiation area of ​​the speaker provided in an embodiment of the present application.

[0155] like Figure 12 As shown, in some embodiments, the second surface 3021b of the first dome 3021 is used to form a front acoustic cavity (not shown) of the speaker. The front acoustic cavity is used to guide sound waves in front of the first dome 3021 to diffuse in a specific direction, optimizing high-frequency directivity. In this embodiment of the present application, the sound emission direction of the front acoustic cavity is along the z-axis, that is, above (in front of) the first dome 3021, achieving upward (forward) sound emission.

[0156] Since the diaphragm 301 is located outside the basin frame 100 , in this scenario, the ideal effective sound radiation area Sd′ of the loudspeaker should be equal to the sum of the equivalent areas of the diaphragm 301 and the dome 302 pushing the air.

[0157] However, during vibration, the air pushed downward by the diaphragm 301 communicates with the front sound cavity. Furthermore, the diaphragm 301 is retracted below the dome 302. The sound waves below the diaphragm 301 and above the first dome 3021 have opposite phases (180° difference). If the sound waves below the diaphragm 301 are not isolated, they will cancel out the sound waves from the first dome 3021.

[0158] The first fixing portion 3012 of the diaphragm 301 is bonded to the frame 100. Point a in the bonding area represents the inner and outer separation, and point a faces the outer surface of the frame 100. The area between point a and the outer edge of the dome 302 is where sound waves cancel each other out. The area of ​​the first dome 3021 facing this area is the sound wave loss area S0.

[0159] The acoustic energy generated by the vibration of the diaphragm 301 in the area outside point a escapes in a non-target direction (such as downward) and does not participate in the superposition of the forward sound field, so that the sound waves below the diaphragm 301 are not effectively utilized, and this area (the sound wave loss area S0) does not contribute to the effective sound radiation of the loudspeaker.

[0160] Thus, 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 loudspeaker is equal to the difference between the ideal effective sound radiation area Sd' and the sound wave loss area S0.

[0161] The actual effective sound radiation area Sd1 of the loudspeaker includes the area of the region surrounded by the position opposite to the first position (point a) of the first fixed part 3012 relative to the outer surface of the basket 100 of the first dome 3021.

[0162] Compared with the loudspeaker assembly 30 shown in Figure 3 , the diaphragm structure 32 of the loudspeaker assembly 30 is located on the inner side of the basket structure 31, the bonding area of the diaphragm structure 32 and the basket structure 31 is the bonding point towards the inner side, the region of the diaphragm structure 32 located on the inner side of the bonding point vibrates, and the bonding point is equivalent to the b point in Figure 12 , that is, the position corresponding to the inner surface of the basket 100 of the first fixed part 3012.

[0163] Thus, the effective sound radiation area Sd0 of the loudspeaker assembly 30 is the area of the region surrounded by the b point, and the area of the region surrounded by the b point is smaller than the area of the region surrounded by the a point. Therefore, the actual effective sound radiation area Sd1 of the loudspeaker provided in the embodiment of the present application is greater than the effective sound radiation area Sd0 of the loudspeaker assembly 30 shown in Figure 3 .

[0164] The loudspeaker provided in the embodiment of the present application is that the diaphragm 301 is bonded to the outer side of the basket 100, the dome 302 includes a first dome 3021 and a second dome 3022, and 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 sound under the driving of the voice coil 303. Thus, the dome 302 is located above the diaphragm 301, and the diaphragm 301 can maximize the shape of the dome 302 by laterally supporting the dome 302. Dividing the dome 302 into the first dome 3021 in the middle and the second dome 3022 as the outer edge ring can not only improve the reliability of the dome 302, but also increase the area of the first dome 3021 used for vibration and sound. In addition, the bonding width of the diaphragm 301 and the basket 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, so as to increase the outdoor loudness of the loudspeaker.

[0165] Figure 13 is the second structural schematic diagram of the loudspeaker provided in the embodiment of the present application; Figure 14 isFigure 13 Structure diagram of the C-C section. Wherein, Figure 13 Figures (a) and (b) show the structure of the loudspeaker from different perspectives.

[0166] As Figure 13 Figures (a), (b) and Figure 14 As shown in some embodiments, the loudspeaker provided by the embodiments of the present application is different from the loudspeaker provided by the foregoing embodiments in that it further comprises a housing 500. Other contents can be referred to the contents of the loudspeaker provided by the foregoing embodiments, which will not be described here.

[0167] The housing 500 is a frame structure with an open end and has an accommodation space.

[0168] The housing 500 is arranged outside the basin frame 100, the magnetic circuit system 200 and the vibration system 300 and is fixed to the magnetic conducting plate 201. In order to facilitate bonding with the housing 500, the edge of the magnetic conducting plate 201 is extended to adapt to the size of the housing 500.

[0169] The height of the housing 500 along the z-axis direction is greater than the overall height of the loudspeaker shown in Figure 6 , so that the upper end of the housing 500 is spaced apart from the first spherical top 3021 by a certain distance; the width / length of the housing 500 along the x / y-axis direction is greater than the overall width / length of the loudspeaker shown in Figure 6 , so that the peripheral side of the housing 500 is spaced apart from the second spherical top 3022 by a certain distance.

[0170] In this way, the housing 500 and the second surface 3021b of the first spherical top 3021 form a front sound cavity of the loudspeaker, and the vibration gap between the diaphragm 301 and the magnetic conducting plate 201 is in communication with the front sound cavity.

[0171] An acoustic outlet 501 can be formed on the housing 500, and the acoustic outlet 501 is in communication with the front sound cavity. The position of the acoustic outlet 501 determines the direction of sound wave diffusion.

[0172] For example, if the acoustic outlet 501 is located at the upper end of the housing 500 close to the first spherical top 3021, the sound waves generated by the vibration of the first spherical top 3021 can be diffused from the upper (front) side of the loudspeaker, realizing upper sound emission. If the acoustic outlet 501 is located on the side wall of the housing 500, the sound waves generated by the vibration of the first spherical top 3021 can be diffused from the side surface of the loudspeaker, realizing side sound emission.

[0173] The loudspeaker provided by the embodiments of the present application can determine the sound emission direction by using the housing 500 under the premise of increasing the effective sound radiation area, so as to improve the application range of the loudspeaker.

[0174] Figure 15 is a second exploded structure diagram of the loudspeaker provided by the embodiments of the present application.

[0175] As shown in Figure 15 some embodiments, a loudspeaker provided by the present application comprises a first sealing ring 401, a basket 100, and a magnetic circuit system 200 and a vibration system 300 connected with the basket 100.

[0176] The functions, structural components and connection modes of the basket 100, the magnetic circuit system 200 and the vibration system 300 can be referred to the loudspeaker shown in Figures 4 to 12 , which will not be described here.

[0177] The first sealing ring 401 is an elastic body (such as rubber, silica gel, etc.) or an elastic structure (such as a wave or sawtooth type elastic wave), and has elastic deformation and sealing effects.

[0178] In combination with the content of the loudspeaker shown in Figure 12 , when vibrating and making sound, the air behind (below) the diaphragm 301 directly escapes downward, and 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 loudspeaker, and further resulting in a loss of volume.

[0179] In order to further improve the effective sound radiation area of the loudspeaker and improve the loudness of the external speaker, the first sealing ring 401 is arranged below the diaphragm 301 to isolate the sound waves behind (below) the diaphragm 301, avoid the generation of a sound wave mutual cancellation area (S0 corresponding area), and improve the effective sound radiation area.

[0180] Figure 16 is a third structural schematic view of the loudspeaker provided by the present application; Figure 17 is a structural schematic view of section D-D in Figure 16 , wherein Figure 16 is not shown in

[0181] As shown in Figure 16 , (a), (b) and Figure 17 , in some embodiments, the first sealing ring 401 is a ring structure, the first sealing ring 401 is sleeved on the outside of the basket 100, and is located between the diaphragm 301 and the magnetic conducting plate 201.

[0182] The upper and lower surfaces of the first sealing ring 401 respectively abut against the diaphragm 301 and the magnetic conducting plate 201, the inner surface of the first sealing ring 401 abuts against the outer surface of the basket 100, and the outer surface of the first sealing ring 401 is coplanar with the outer surface of the second spherical top 3022.

[0183] Thus, the vibration gap between the diaphragm 301 and the magnetic conductive plate 201 can be sealed by the first sealing ring 401, the rear (lower) side of the diaphragm 301 is completely isolated from the sound wave path of the front sound cavity, and the phase cancellation of the sound waves escaping downward from the rear (lower) side of the diaphragm 301 and the sound waves upward from the front side (the sound waves generated by the first dome 3021) is avoided (especially the low-frequency sound waves), thereby reducing the loss of sound energy and increasing the effective sound radiation area.

[0184] Figure 18 is a second top view structural schematic diagram of a magnetic circuit system and a voice coil provided by the embodiment of the present application.

[0185] As shown in Figure 17 and Figure 18 , in some embodiments, the magnetic conductive plate 201 can include a plurality of first air vents 2011, which are uniformly distributed symmetrically with respect to the voice coil 303. The first air vents 2011 penetrate the upper and lower surfaces of the magnetic conductive plate 201 to communicate the vibration gap with the external environment.

[0186] For example, the first air vents 2011 include two, which are located outside the two long sides of the voice coil 303 and outside the corresponding auxiliary magnetic members 203.

[0187] The plurality of first air vents 2011 are opposite to the first sealing ring 401, the first air vents 2011 are located outside the rear sound cavity, and the first air vents 2011 are used for the airflow generated by the vibration of the diaphragm 301 to flow out to the external environment.

[0188] Thus, after the rear space of the diaphragm 301 is closed by the first sealing ring 401, the original open space becomes a semi-closed space. When the diaphragm 301 vibrates, the air exchange through the first air vents 2011 ensures that the air behind the diaphragm 301 is in communication with the external environment, which can balance the air pressure fluctuation when the diaphragm 301 vibrates, avoid the increase of air spring rigidity caused by complete sealing, and reduce the air spring effect.

[0189] It should be noted that the other functions of the first air vents 2011 can refer to the content of the second air vents 2012 in the foregoing embodiments, which will not be described here.

[0190] Figure 19 is a structural schematic diagram of a yoke provided by the embodiment of the present application; Figure 20 is Figure 16 a structural schematic diagram of the E-E section in Figure 20 corresponding to the structure of the dome 302.

[0191] As shown in Figure 19 and Figure 20As shown, in some embodiments, the basket 100 comprises a plurality of first vent holes 101, which are arranged along the x / y axis direction and penetrate through the inner and outer surfaces of the basket 100 to communicate the area where the first sealing ring 401 is located and the rear sound cavity.

[0192] The plurality of first vent holes 101 are symmetrically distributed, so that the sound waves behind the diaphragm 301 can be directed to the rear sound cavity, rather than randomly leaking. In this way, not only can the airflow disturbance be avoided, but the effective sound radiation area can also be avoided; in addition, the turbulent noise can be reduced to improve the volume clarity.

[0193] The first vent holes 101 are located inside the first sealing ring 401, serving as a sound wave guide channel to communicate 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 folded ring part 3011 of the diaphragm 301 is in communication with the air around the voice coil 303 in the rear sound cavity. The first vent holes 101 and the rear sound cavity form a resonance system, which is tuned to a target low frequency, which can significantly improve the sound pressure level.

[0194] The first sealing ring 401 isolates the rear of the diaphragm 301 from the front sound cavity, forcing the sound waves behind the diaphragm 301 to enter the rear sound cavity through the first vent holes 101 of the basket 100.

[0195] When the diaphragm 301 vibrates, the sound waves behind the diaphragm 301 are limited by the first sealing ring 401, part of the sound waves enter the rear sound cavity through the first vent holes 101 of the basket 100 to communicate with the external environment through the second vent holes 2012 on the magnetic conductive plate 201; part of the sound waves are exchanged through the first vent holes 2011 on the magnetic conductive plate 201 to communicate with the external environment. In this way, the air behind the diaphragm 301 is in communication with the external environment, which can balance the air pressure fluctuation when the dome 302 vibrates. Moreover, the first sealing ring 401 completely isolates the sound wave path from the rear (lower) of the diaphragm 301 to the front sound cavity, avoiding the phase cancellation of the sound waves escaping downward from the rear (lower) of the diaphragm 301 and the sound waves from the front (first dome 3021), thereby reducing the loss of sound energy and increasing the effective sound radiation area.

[0196] Referring again to Figure 6 and Figure 12 As shown, in the speaker provided by the foregoing embodiments, the sound waves behind the diaphragm 301 directly leak downward and do not participate in the forward sound field superposition, although the effective sound radiation area Sd1 can be improved compared to the speaker assembly 30 of the prior art, but 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 speaker provided by the foregoing embodiments only calculates the projected area of the first dome 3021 that is not covered by the area other than the a point of the diaphragm 301.

[0197] Referring again to Figure 17 As shown, the loudspeaker provided by the embodiments of the present application isolates the rear of the diaphragm 301 by the first sealing ring 401, and the sound pressure in the rear of the diaphragm 301 is directed out (rather than randomly leaked) through the first air leakage hole 2011 and the first air vent hole 101 to communicate with the external environment.

[0198] In this way, the effective vibration area of the first dome 3021 can be equivalent to an "auxiliary radiation area" which is Figure 12 As shown, the sound wave loss area S0, 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, the actual effective sound radiation area Sd2 of the loudspeaker includes the surface area of the second surface 3021b of the first dome 3021 to fully utilize the front surface area of the dome 302.

[0199] It should be noted that if the second dome 3022 adopts a bending structure in cross section, the actual effective sound radiation area Sd2 of the loudspeaker includes the total surface area of the second surface 3021b of the first dome 3021 and the surface of the second dome 3022 that is coplanar with the second surface 3021b. It can be understood that the actual effective sound radiation area Sd2 of the loudspeaker is the surface area of the dome 302 facing the front sound cavity.

[0200] The loudspeaker provided by the embodiment of the present application is characterized in that the diaphragm 301 is bonded to the outer side of the basket 100, the dome 302 comprises 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 produce sound under the driving of the voice coil 303. The first sealing ring 401 is sleeved on the outer side of the basket 100 and located between the diaphragm 301 and the magnetic conducting plate 201. In this way, the dome 302 is located above the diaphragm 301, the diaphragm 301 is used to laterally support the dome 302, and the shape of the dome 302 can be maximized. The dome 302 is divided into two parts, the first dome 3021 in the middle and the second dome 3022 as an outer edge ring, which can not only improve the reliability of the dome 302 but also increase the area of the first dome 3021 used for vibration and sound production. Moreover, the bonding width of the diaphragm 301 and the basket 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 the effective sound radiation area of the loudspeaker, thereby increasing the loudness of the loudspeaker. Meanwhile, a plurality of first air release holes 2011 are formed in the magnetic conducting plate 201 to guide the sound waves behind the diaphragm 301 to the external environment. A plurality of first air holes 101 are formed in the basket 100 to guide the sound waves behind the diaphragm 301 to the rear sound cavity and then to the external environment through the second air release hole 2012 in the magnetic conducting plate 201. In this way, the sound wave path behind the diaphragm 301 and the front sound cavity can be completely isolated, the sound waves escaping downward behind the diaphragm 301 and the sound waves in the front direction (generated by the first dome 3021) can be prevented from phase cancellation (especially low-frequency sound waves), thereby reducing the loss of sound energy and greatly increasing the effective sound radiation area, so as to further increase the loudness of the loudspeaker.

[0201] Figure 21 Figure 4 is a fourth structural schematic diagram of the loudspeaker provided by the embodiment of the present application. Figure 22 Figure 5 is a structural schematic diagram of the loudspeaker provided by the embodiment of the present application. Figure 21 Figure 6 is a structural schematic diagram of the F-F section of the loudspeaker provided by the embodiment of the present application. Figure 21 Figures 7(a) and 7(b) show the structure of the loudspeaker from different perspectives.

[0202] As shown in Figures 8(a) and 8(b), in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in Figure 1 in that it further comprises a housing 500. Figure 21 As shown in Figures 8(a) and 8(b), in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in Figure 1 in that it further comprises a housing 500. Figure 22 As shown in Figures 8(a) and 8(b), in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in Figure 1 in that it further comprises a housing 500. Figures 15 to 20 As shown in Figures 8(a) and 8(b), in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in Figure 1 in that it further comprises a housing 500.

[0203] The housing 500 is a frame structure with an open end and has a containing space.

[0204] The shell 500 is arranged outside the basket 100, the magnetic circuit system 200 and the vibration system 300, and is fixed to the magnetic conducting plate 201. In order to facilitate bonding with the shell 500, the edge of the magnetic conducting plate 201 is extended to adapt to the size of the shell 500.

[0205] The height of the shell 500 along the z-axis direction is greater than the overall height of the loudspeaker shown in the figure, so that the upper end of the shell 500 is spaced apart from the first spherical top 3021 by a certain distance; the width / length of the shell 500 along the x / y-axis direction is greater than the overall width / length of the loudspeaker shown in the figure, so that the circumferential side of the shell 500 is spaced apart from the second spherical top 3022 by a certain distance. Figure 17 Figure 17

[0206] In this way, the shell 500 and the second surface 3021b of the first spherical top 3021 form a front sound cavity of the loudspeaker, and the vibration gap between the diaphragm 301 and the magnetic conducting plate 201 is in communication with the front sound cavity.

[0207] The shell 500 can be provided with a sound outlet 501, and the sound outlet 501 is in communication with the front sound cavity. The position of the sound outlet 501 determines the direction of sound wave diffusion.

[0208] For example, if the sound outlet 501 is located at the upper end of the shell 500 close to the first spherical top 3021, the sound wave generated by the vibration of the first spherical top 3021 can be diffused from the upper (front) side of the loudspeaker, realizing upper sound emission. If the sound outlet 501 is located at the side wall of the shell 500, the sound wave generated by the vibration of the first spherical top 3021 can be diffused from the side surface of the loudspeaker, realizing side sound emission.

[0209] The loudspeaker provided by the embodiment of the present application can determine the sound emission direction by using the shell 500 under the premise of increasing the effective sound radiation area, so as to improve the application range of the loudspeaker.

[0210] Figure 23 FIG. 3 is a third exploded structural schematic view of the loudspeaker provided by the embodiment of the present application.

[0211] As shown in the figure, in some embodiments, the loudspeaker provided by the embodiment of the present application comprises a second sealing ring 402, a basket 100, and a magnetic circuit system 200 and a vibration system 300 connected with the basket 100. Figure 23 The functions, structural components and connection modes of the basket 100, the magnetic circuit system 200 and the vibration system 300 can be referred to the loudspeaker shown in FIGS. 1 and 2, and will not be described herein again.

[0212] Figure 4 Figure 12 The functions, structural components and connection modes of the basket 100, the magnetic circuit system 200 and the vibration system 300 can be referred to the loudspeaker shown in FIGS. 1 and 2, and will not be described herein again.

[0213] ​​​​The second sealing ring 402 is an elastic body (such as rubber, silicone, etc.) or an elastic structure (such as a wave or sawtooth elastic wave), and the second sealing ring 402 has elastic deformation and sealing functions.

[0214] The speaker provided in the embodiment of the present application is Figures 15 to 20 The difference between the speakers shown in FIG. 1 is that the first sealing ring 401 is replaced by the second sealing ring 402, the structure of the dome 302 is different, and the connection method between the basin frame 100 and the diaphragm 301 is different. For other contents, please refer to FIG. Figures 15 to 20 The contents of the speakers shown are not described here in detail.

[0215] Figure 24 This is a second structural diagram of the diaphragm provided in the embodiment of the present application. Figure 24 (a) and (b) show the structure of the diaphragm 301 from different perspectives.

[0216] like Figure 24 As shown in (a) and (b), in some embodiments, the diaphragm 301 may include a fold portion 3011 , a first fixing portion 3012 located inside the fold portion 3011 , and a second fixing portion 3013 located outside the fold portion 3011 .

[0217] The first fixing portion 3012 and the second fixing portion 3013 extend along the x-axis or y-axis, and the surface of the first fixing portion 3012 and the surface of the second fixing portion 3013 can be coplanar. The first fixing portion 3012 and the second fixing portion 3013 are both skirt-shaped and located on the inner and outer sides of the ring portion 3011, facilitating the connection between the inner and outer sides of the diaphragm 301, the dome 302, and the basin frame 100.

[0218] It should be noted that other structural details of the diaphragm 301 can be found in Figure 8 The contents of the diaphragm 301 are not described in detail here.

[0219] Figure 25 This is a fifth structural diagram of the speaker provided in the embodiment of the present application; Figure 26 yes Figure 25 Schematic diagram of the structure of the GG section. Figure 25 The structure of the first dome 3021 is not shown in (b).

[0220] like Figure 25 (a), (b) and Figure 26 As shown, in some embodiments, the diaphragm 301 is located in the receiving space of the basin frame 100, one end of the diaphragm 301 can be fixedly connected to the basin frame 100 by an adhesive, and the other end of the diaphragm 301 extends toward the main magnetic component 202, and the other end of the diaphragm 301 is located on the inner side of the receiving space of the basin frame 100.

[0221] The second fixed part 3013 of the diaphragm 301 is fixed to the other end of the frame 100 and has a vibration gap with the first dome 3021 to provide a vibration space for the up-down vibration of the folded ring part 3011; the folded ring part 3011 and the first fixed part 3012 are located on the inner side of the frame 100; the first fixed part 3012 is connected with the second dome 3022, the first fixed part 3012 is bonded with the second dome 3022, and is in a vertical state.

[0222] In this way, the frame 100 laterally supports the diaphragm 301, which can suppress the lateral vibration mode. The diaphragm 301 is located in the accommodation space of the frame 100, i.e., the diaphragm 301 is located in the rear sound cavity of the loudspeaker, so that the sound waves behind the diaphragm 301 directly communicate with the rear sound cavity, which can avoid the sound waves generated by the diaphragm 301 flowing to the front sound cavity and causing phase cancellation with the sound waves of the front sound cavity, thereby reducing the loss of sound energy, and further improving the effective sound radiation area and sound pressure level to improve the loudness of the external speaker.

[0223] Figure 27 is a second structural diagram of the dome provided by the embodiment of the application. Among them, Figure 27 (a) and (b) of the dome 302 show the structure of the dome 302 from different angles.

[0224] As Figure 27 As shown in (a) and (b), in some embodiments, the second dome 3022 is arranged on the first surface 3021a of the first dome 3021, and the second dome 3022 is recessed inwardly relative to the edge of the first dome 3021 by a second distance L2.

[0225] That is, the first dome 3021 is a plate structure, and the second dome 3022 is a ring structure, and the cross section of the second dome 3022 is a plate structure, such as a "|" type. 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.

[0226] 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 lateral support of the diaphragm 301 to the first dome 3021, which can keep the first dome 3021 centered, limit the lateral displacement of the first dome 3021, avoid deformation or uneven stress distribution of the first dome 3021, and avoid weakening the acoustic performance.

[0227] It should be noted that the first dome 3021 and the second dome 3022 can be connected by bonding, or can be integrally formed. The dome 302 is formed by two parts, which not only can improve the stability of the dome 302, but also can realize the reciprocating motion of the upper and lower parts.

[0228] In some embodiments, the second dome 3022 can include a plurality of second vent holes 3023 penetrating the inner and outer surfaces of the second dome 3022 along the x / y-axis direction.

[0229] The plurality of second vent holes 3023 are in communication with the rear sound cavity of the speaker to communicate 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 guide channel for the air flow generated when the diaphragm 301 vibrates to flow out to the rear sound cavity, and then communicate with the external environment through the second air leakage hole 2012 on the magnetic plate 201, thereby balancing the air pressure fluctuation when the dome 302 vibrates.

[0230] The plurality of second vent holes 3023 are symmetrically distributed. For example, the second vent holes 3023 include four second vent holes 3023 respectively corresponding to the four sides of the second dome 3022. In this way, not only can the air flow disturbance be avoided to affect the effective sound radiation area, but also the turbulent noise can be reduced to improve the volume clarity.

[0231] Figure 28 is a second partial structure schematic view of the dome and the diaphragm at the connection provided by the embodiments of the present application.

[0232] As shown in Figure 28 some embodiments, the yoke 100 is opposite to the edge of the first dome 3021, and the outer surface of the yoke 100 and the end surface of the first dome 3021 can be coplanar.

[0233] In this way, the diaphragm 301 is retracted below the first dome 3021, so that the bonding width of the yoke 100 and the diaphragm 301 does not affect the area of the first dome 3021, thereby not affecting the effective vibration area of the first dome 3021, which is conducive to increasing the effective sound radiation area of the speaker. Moreover, the diaphragm 301 is located between the first dome 3021 and the yoke 100, and in combination with the second dome 3022, a vibration gap for the diaphragm 301 to vibrate can be enclosed.

[0234] When assembling the diaphragm 301, the dome 302 and the yoke 100, the second fixed part 3013 of the diaphragm 301 is bonded to the yoke 100, and the first fixed part 3012 and the folded ring part 3011 of the diaphragm 301 are located in the accommodation space of the yoke 100. One end of the second dome 3022 is bonded to the first fixed part 3012 of the diaphragm 301 in a perpendicular state, and the second vent holes 3023 on the second dome 3022 communicate the vibration gap of the diaphragm 301 and the rear sound cavity inside the second dome 3022. The first dome 3021 is bonded to the other end of the second dome 3022 in a perpendicular state. The extension directions of the first fixed part 3012 and the second fixed part 3013 are the same and parallel to the extension direction of the first dome 3021.

[0235] In this way, the folded ring 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, so that the reliability of the diaphragm 301 and the dome 302 can be improved. The diaphragm 301 laterally supports the dome 302, so that the dome 302 can be kept centered, the lateral displacement of the dome 302 is limited, and an elastic restoring force is provided to ensure the linear movement of the dome 302 in the up-down direction.

[0236] Referring again to Figure 26 As shown, in some embodiments, the second sealing ring 402 has a ring structure, the second sealing ring 402 is sleeved on the outer side of the second dome 3022 and located between the diaphragm 301 and the first dome 3021.

[0237] The upper and lower surfaces of the second sealing ring 402 respectively abut against the diaphragm 301 and the first dome 3021, the inner side surface of the second sealing ring 402 abuts against the outer surface of the second dome 3022, and the outer side surface of the second sealing ring 402 is coplanar with the outer surface of the first dome 3021 and the outer surface of the basket 100.

[0238] The second sealing ring 402 can 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. The second air hole 3023 on the second dome 3022 allows the air in the space formed by the second sealing ring 402 and the folded ring portion 3011 of the diaphragm 301 to communicate with the air around the voice coil 303 in the rear sound cavity, so that the air pushed by the diaphragm 301 during vibration enters the rear sound cavity through the second air hole 3023.

[0239] After the second sealing ring 402 seals the space in front of the diaphragm 301, the originally open space becomes a semi-closed space. When the diaphragm 301 vibrates, the air flow exchange through the second air hole 3023 ensures that the air in front of the diaphragm 301 is communicated with the rear sound cavity, and then is guided out to the external environment through the second air hole 2012 on the magnetic conductive plate 201. In this way, the guided sound wave is in phase with the sound wave behind the diaphragm 301, which not only does not cancel out, but also can enhance the low frequency sound pressure level (SPL). Moreover, the superimposed sound wave is guided out to the external environment, which can balance the air pressure fluctuation when the dome 302 vibrates, avoid the increase of air spring rigidity caused by complete sealing, and reduce the air spring effect.

[0240] The loudspeaker provided by the embodiments of the present application uses the second sealing ring 402 to completely isolate the sound wave path of the front (upper) side of the diaphragm 301 from the front sound cavity. The sound pressure in front of the diaphragm 301 is directed out (rather than randomly leaked) to the rear sound cavity through the second air hole 3023, and the rear side of the diaphragm 301 is located in the rear sound cavity, so that the sound waves diffused downward from the rear side of the diaphragm 301 are superimposed with the sound waves directed out through the second air hole 3023, and are jointly directed out to the external environment through the second air hole 2012 of the rear sound cavity. In this way, the sound waves generated by the diaphragm 301 can be avoided to be phase-canceled with the sound waves in the front direction (generated by the first dome 3021), especially the low-frequency sound waves, thereby reducing the sound energy loss and improving the effective sound radiation area and the low-frequency sound pressure level (SPL), so as to improve the sound loudness.

[0241] The effective vibration area of the first dome 3021 can be equivalent to increase an "auxiliary radiation area", which is Figure 12 The sound wave loss area S0 shown in the figure, 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, and 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.

[0242] The loudspeaker provided by the embodiment of the present application is characterized in that the diaphragm 301 is bonded to the inner side of the basket 100, the dome 302 comprises 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 the voice coil 303 and vibrates to produce sound under the driving of the voice coil 303, and the second sealing ring 402 is sleeved on the outer side of the second dome 3022 and located between the diaphragm 301 and the first dome 3021. In this way, the dome 302 is located above the diaphragm 301, the diaphragm 301 is used to laterally support the dome 302, and the shape of the dome 302 can be maximized. The dome 302 is divided into two parts, the first dome 3021 in the middle and the second dome 3022 as an outer edge ring, which can not only improve the reliability of the dome 302 but also increase the area of the first dome 3021 used for vibration and sound production. In addition, the bonding width of the diaphragm 301 to the basket 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 loudness of the loudspeaker. At the same time, a plurality of second air holes 3023 are formed in the second dome 3022, the sound pressure in front of the diaphragm 301 is directed to the rear sound cavity through the second air holes 3023 (rather than randomly leaked), the sound waves behind the diaphragm 301 are directly combined and superimposed in the rear sound cavity, and are jointly directed to the external environment through the second air holes 2012 of the rear sound cavity. In this way, the sound wave path of the front sound cavity in front of the diaphragm 301 can be completely isolated, the sound waves generated by the diaphragm 301 and the sound waves in the front direction (the sound waves generated by the first dome 3021) can be prevented from being phase-canceled (especially the low-frequency sound waves), the sound energy loss can be reduced, the effective sound radiation area and the low-frequency sound pressure level can be greatly increased, and the loudness of the loudspeaker can be further increased.

[0243] Figure 29 FIG. 6 is a sixth structural schematic diagram of the loudspeaker provided by the embodiment of the present application.

[0244] As shown in FIG. 6, in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in FIG. 5 in that it further comprises a housing 500. Figure 29 Figures 23 to 28 As shown in FIG. 6, in some embodiments, the loudspeaker provided by the embodiment of the present application is different from the loudspeaker provided by the embodiment shown in FIG. 5 in that it further comprises a housing 500.

[0245] The housing 500 is a frame structure with one open end and has a containing space.

[0246] The housing 500 is sleeved on the outer side of the basket 100, the magnetic circuit system 200 and the vibration system 300 and is fixed to the magnetic conducting plate 201. In order to be bonded to the housing 500, the edge of the magnetic conducting plate 201 is extended outward to adapt to the size of the housing 500.

[0247] ​The height of the shell 500 along the z-axis direction is greater than the overall height of the loudspeaker shown in FIG. 1, so that the upper end of the shell 500 is spaced apart from the first spherical top 3021 by a certain distance; the width / length of the shell 500 along the x / y-axis direction is greater than the overall width / length of the loudspeaker shown in FIG. 1, so that the circumferential side of the shell 500 is spaced apart from the second spherical top 3022 by a certain distance. Figure 26 The height of the shell 500 along the z-axis direction is greater than the overall height of the loudspeaker shown in FIG. 1, so that the upper end of the shell 500 is spaced apart from the first spherical top 3021 by a certain distance; the width / length of the shell 500 along the x / y-axis direction is greater than the overall width / length of the loudspeaker shown in FIG. 1, so that the circumferential side of the shell 500 is spaced apart from the second spherical top 3022 by a certain distance. Figure 26 The height of the shell 500 along the z-axis direction is greater than the overall height of the loudspeaker shown in FIG. 1, so that the upper end of the shell 500 is spaced apart from the first spherical top 3021 by a certain distance; the width / length of the shell 500 along the x / y-axis direction is greater than the overall width / length of the loudspeaker shown in FIG. 1, so that the circumferential side of the shell 500 is spaced apart from the second spherical top 3022 by a certain distance.

[0248] In this way, the shell 500 and the second surface 3021b of the first spherical top 3021 form a front sound cavity of the loudspeaker, and the vibration gap between the diaphragm 301 and the magnetic conducting plate 201 is in communication with the front sound cavity.

[0249] The shell 500 can be provided with a sound outlet 501, and the sound outlet 501 is in communication with the front sound cavity. The position of the sound outlet 501 determines the direction of sound wave diffusion.

[0250] For example, if the sound outlet 501 is located at the upper end of the shell 500 close to the first spherical top 3021, the sound wave generated by the vibration of the first spherical top 3021 can be diffused from the upper (front) side of the loudspeaker, achieving upper sound emission. If the sound outlet 501 is located at the side wall of the shell 500, the sound wave generated by the vibration of the first spherical top 3021 can be diffused from the side surface of the loudspeaker, achieving side sound emission.

[0251] The loudspeaker provided by the embodiment of the present application can determine the sound emission direction by using the shell 500 under the premise of increasing the effective sound radiation area, so as to improve the application range of the loudspeaker.

[0252] Referring back to Figure 1 The embodiment of the present application also provides an electronic device, which comprises a display screen 10, a middle frame 20, a back shell, and the loudspeaker provided by any of the foregoing embodiments.

[0253] The display screen 10 and the back shell are located at opposite sides of the middle frame 20, and the display screen 10, the middle frame 20 and the back shell are sequentially buckled together to form a whole machine cavity.

[0254] The middle frame 20 comprises a sound outlet hole 21, the loudspeaker is located in the whole machine cavity, and the sound outlet 501 of the loudspeaker is in communication with the sound outlet hole 21 to achieve sound diffusion.

[0255] The electronic device provided by the embodiment of the present application adopts the loudspeaker with high effective sound radiation area, so as to improve the outdoor loudness of the loudspeaker and further improve the outdoor loudness of the electronic device.

[0256] It is understood that other embodiments of the application will become readily apparent to those skilled in the art from the disclosure herein, namely, the nature of the application. The scope of the application is defined by the claims below rather than the foregoing description, and all changes and modifications that come within the meaning and range of equivalents of the claims are to be embraced. The application is to be considered as encompassing all such changes and modifications.

[0257] It is understood that the application is not limited to the precise construction described above and illustrated in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is to be determined only by the claims appended hereto.

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), the diaphragm (301) comprising a folding ring portion (3011), a first fixing portion (3012) located inside the folding ring portion (3011), and a second fixing portion (3013) located outside the folding ring portion (3011); the first fixing portion (3012) is fixed to the other end of the basin frame (100), the folding ring portion (3011) protrudes in the direction of the basin frame (100), and the folding ring portion (3011) and the second fixing portion (3013) are located outside 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) facing 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 second fixing portion (3013); wherein the first surface faces the diaphragm (301); a voice coil (303) fixed to the first surface of the first dome (3021) and 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; The effective sound radiation area of ​​the loudspeaker includes the area of ​​a region enclosed by positions of the first dome (3021) and the first position of the first fixing portion (3012) relative to each other; The first position is a position where the first fixing portion (3012) is relative to the outer surface of the basin frame (100).

2. The loudspeaker according to claim 1, wherein 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 auxiliary 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 auxiliary magnetic parts (203) are arranged around the main magnetic part (202), and each of the auxiliary magnetic parts (203) has a magnetic gap with the main magnetic part (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 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 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 folding ring portion (3011), and the other end extends in a direction away from the folding ring portion (3011); The blocking portion (30132) is located on the surface of the supporting portion (30131) facing the first spherical top (3021), and is retracted inward by a first distance relative to the other end of the supporting portion (30131).

5. The loudspeaker according to claim 4, characterized in that The second spherical top (3022) is connected to the four edges of the first spherical top (3021); The second spherical top (3022) is arranged on the outside of the blocking portion (30132) and abuts against the supporting portion (30131).

6. The loudspeaker according to claim 5, characterized in that Also included: a first sealing ring (401); The first sealing ring (401) is sleeved on the outside of the basin frame (100) and abuts against the vibration membrane (301) and the magnetic conductive plate (201) respectively to seal the vibration gap.

7. The loudspeaker according to claim 6, characterized in that The magnetic conductive plate (201) comprises a plurality of first air leakage holes (2011); The plurality of first air leakage holes (2011) are opposite to the first sealing ring (401), and the first air leakage holes (2011) are used to allow the airflow generated by the vibration of the diaphragm (301) to flow out to the external environment.

8. The loudspeaker according to claim 7, characterized in that The basin frame (100) comprises a plurality of first ventilation holes (101); The first vent hole (101) is opposite to the first sealing ring (401), and the first vent hole (101) is connected to the vibration gap of the diaphragm (301) and the rear sound cavity of the speaker; The rear sound cavity is surrounded by the dome (302), the diaphragm (301), the basin frame (100) and the magnetic circuit system (200).

9. The loudspeaker according to claim 8, characterized in that The effective sound radiation area of ​​the loudspeaker includes the surface area of ​​the first dome (3021).

10. The loudspeaker according to claim 1, wherein Also included: a housing (500); The housing (500) is arranged on the outside of the basin frame (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) form a front sound cavity of the speaker, and the second surface is opposite to the first surface.

11. The loudspeaker according to claim 10, wherein The housing (500) includes a sound outlet (501); The sound outlet (501) is located on a side wall of the housing (500), and the sound outlet (501) is communicated with the front sound cavity.

12. A loudspeaker, characterized in that: include: A second sealing ring (402), 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), the diaphragm (301) comprising a folding ring portion (3011), a first fixing portion (3012) located on the inner side of the folding ring portion (3011), and a second fixing portion (3013) located on the outer side of the folding ring portion (3011); the second fixing portion (3013) is fixed to the other end of the basin frame (100), the folding ring portion (3011) protrudes in the direction of the basin frame (100), and the folding ring portion (3011) and the first fixing portion (3012) are located on the inner side 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 the first surface of the first dome (3021) and is retracted a second distance relative to the edge of the first dome (3021); the second dome (3022) is connected to the first fixing portion (3012); wherein the first surface faces the diaphragm (301); the second sealing ring (402) is sleeved on the outside of the second dome (3022) and abuts against the diaphragm (301) and the first dome (3021) respectively; a voice coil (303) fixed to the first surface of the first dome (3021) and 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; The effective sound radiation area of ​​the loudspeaker includes the area of ​​the first dome (3021).

13. The loudspeaker according to claim 12, wherein: 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 auxiliary 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 auxiliary magnetic parts (203) are arranged around the main magnetic part (202), and each of the auxiliary magnetic parts (203) has a magnetic gap with the main magnetic part (202); A portion of the voice coil (303) is suspended within the magnetic gap.

14. The loudspeaker according to claim 13, wherein The basin frame (100) is opposite to the edge of the first spherical top (3021).

15. The loudspeaker according to claim 14, characterized in that The second spherical top (3022) includes a plurality of second ventilation holes (3023); A plurality of second vent holes (3023) are in communication with the rear sound cavity of the speaker, and the second vent holes (3023) are used to allow airflow generated when the diaphragm (301) vibrates to flow out into the rear sound cavity; The rear sound cavity is surrounded by the dome (302), the diaphragm (301), the basin frame (100) and the magnetic circuit system (200).

16. The loudspeaker according to claim 12, wherein Also included: a housing (500); The housing (500) is arranged on the outside of the basin frame (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) form a front sound cavity of the speaker, and the second surface is opposite to the first surface.

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

18. An electronic device, characterized in that: comprising a display screen, a middle frame, a rear housing, and a speaker according to any one of claims 1 to 17; The display screen and the rear housing are located on opposite sides of the middle frame and are connected to the middle frame to form a whole device cavity; The middle frame includes a sound outlet; The speaker is located in the whole machine cavity, and the sound outlet of the speaker is communicated with the sound outlet.

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