CN111654790A

CN111654790A - Sound production device and electronic equipment

Info

Publication number: CN111654790A
Application number: CN202010615741.6A
Authority: CN
Inventors: 刘光磊; 籍成宗
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2020-09-11
Also published as: WO2022000917A1; CN112104955A

Abstract

The invention discloses a sounding device and electronic equipment, the sounding device includes a vibration system and a magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system includes: the vibrating diaphragm is made of rubber; the composite layer is integrally formed with at least part of the composite layer at the center of the diaphragm; and the voice coil assembly is connected to one side, deviating from the vibrating diaphragm, of the composite layer, and is movably arranged in the magnetic gap. The technical scheme of the invention aims to ensure the connection effect of the vibrating diaphragm and the dome, improve the reliability of the loudspeaker and ensure the quality of the loudspeaker.

Description

Sound production device and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic, in particular to a sounding device and electronic equipment.

Background

In mobile intelligent devices such as mobile phones and flat panels, speakers are widely used, and with the development of mobile intelligent devices, the speakers have higher requirements in terms of voice and music quality, reliability, weight, size and the like. The diaphragm of a loudspeaker is generally made of high polymer materials, and the current development trend is to adopt a rubber film as the diaphragm. If glue is used for bonding the rubber membrane and the dome and the rubber membrane and the voice coil assembly in a traditional mode, the rubber membrane and the dome need to be bonded to the vibrating diaphragm through double-sided adhesive or glue coating, glue is arranged on the other side of the dome, and then the glue is bonded to the voice coil assembly to form the vibrating system. However, at present, no glue which is beneficial to the acoustic performance of the loudspeaker and has strong viscosity is used for bonding the rubber film and other parts, the surface inertia of the rubber material enables the two materials to be chemically inert, and the bonding is very difficult due to trace silicon oil precipitated on the surface of a rubber product. So, can't guarantee the connection effect of vibrating diaphragm and dome, influence the reliability of speaker, reduced the quality of speaker.

Disclosure of Invention

The invention mainly aims to provide a sound production device, aiming at ensuring the connection effect of a vibrating diaphragm and a dome, improving the reliability of a loudspeaker and ensuring the quality of the loudspeaker.

In order to achieve the above object, the present invention provides a sound generating device, including a vibration system and a magnetic circuit system, wherein the magnetic circuit system is provided with a magnetic gap, and the vibration system includes:

the vibrating diaphragm is made of rubber;

the composite layer is integrally formed with at least part of the composite layer at the center of the diaphragm; and

and the voice coil assembly is connected with one side, deviating from the vibrating diaphragm, of the composite layer, and is movably arranged in the magnetic gap.

In some embodiments of the present invention, the composite layer includes a first spherical cap and a second spherical cap attached to each other, the voice coil assembly is connected to the first spherical cap, the center of the diaphragm is integrally formed with the second spherical cap, and the center of the first spherical cap and the center of the second spherical cap are concentrically disposed;

or the composite layer comprises a first spherical top and a second spherical top convexly arranged on the surface of the first spherical top, the first spherical top and the second spherical top are of an integral structure, and the vibrating diaphragm is injection-molded/hot-pressed on the top surface and the side surface of the second spherical top.

In some embodiments of the present invention, an area of the first dome is larger than an area of the second dome, the voice coil assembly projects on the first dome to form a first projection area, and an outer contour of the first projection area includes an outer contour of the second dome;

and/or the first spherical top and the second spherical top are fixedly bonded.

In some embodiments of the present invention, the diaphragm is liquid silicone rubber or liquid nitrile rubber, and the diaphragm and the second dome are integrated by injection molding.

In some embodiments of the present invention, the diaphragm is made of solid rubber, and the material of the rubber is one of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber, or ethylene propylene diene monomer; or the rubber is a mixture of at least two rubbers of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber or ethylene propylene diene monomer rubber; the vibrating diaphragm and the second ball top are combined into a whole through hot pressing.

In some embodiments of the present invention, the diaphragm includes a central portion located at the middle position, a corrugated portion located outside the central portion, and a fixing portion connected to the corrugated portion, and the central portion and the second dome are integrally formed;

defining that the vibrating diaphragm has a vibration direction, projecting at least part of the bending ring part on the first spherical top along the vibration direction to form a second projection area, and coinciding the outer contour of at least part of the second projection area with the first spherical top.

In some embodiments of the present invention, a projection of the corrugated rim portion on a horizontal plane perpendicular to the vibration direction forms a third projection area, a projection of the diaphragm on a horizontal plane perpendicular to the vibration direction forms a fourth projection area, and an area S3 of the third projection area and an area S4 of the fourth projection area have a relationship of: 0.7 is less than or equal to S3/S4 is less than or equal to 0.9.

In some embodiments of the present invention, the width w of the loop portion has a value range of: w is more than or equal to 1mm and less than or equal to 2 mm;

and/or the value range of the height h of the folded ring part is as follows: h is more than or equal to 0.9mm and less than or equal to 1.3 mm.

In some embodiments of the invention, the central portion is a plate-like structure;

and/or the first spherical top and/or the second spherical top are/is of a flat-plate-shaped structure.

In some embodiments of the invention, the central portion is provided with an extension extending from the central portion towards the first dome and connecting with a side of the second dome.

In some embodiments of the invention, the extension is disposed around a periphery of the second dome; the bottom surface of the first dome is integrated with the second dome.

In some embodiments of the present invention, a height of the fixing portion in the vibration direction is lower than a height of the central portion.

In some embodiments of the present invention, the fixing portion includes a fixing body and a fixing groove disposed on the fixing body, the fixing body is connected to the edge portion, and the fixing groove is used for fixing the diaphragm.

In some embodiments of the present invention, the fixing portion further includes a position-limiting section, one side of the position-limiting section is connected to a groove wall of the fixing groove, and the other side of the position-limiting section extends toward the notch of the fixing groove.

In some embodiments of the present invention, the material of the first dome and the second dome comprises a rigid material; the rigid material includes at least one of a carbon fiber material, a metal material, or a foamed metal.

The present invention further provides an electronic device, including a sound generating device, the sound generating device includes a vibration system and a magnetic circuit system, the magnetic circuit system is provided with a magnetic gap, the vibration system includes:

the vibrating diaphragm is made of rubber;

The sound production device is provided with the vibration system and the magnetic circuit system, the magnetic gap is arranged in the magnetic circuit system, the vibration system is further provided with the vibrating diaphragm made of rubber, the center of the vibrating diaphragm is integrally connected with at least one part of the composite layer, and the voice coil assembly is connected to one side of the composite layer, which is far away from the vibrating diaphragm, so that the voice coil assembly can move in the magnetic gap. Owing to adopt integrated into one piece to set up rubber vibrating diaphragm and composite bed, specifically can be the mode of integrative injection moulding for the rubber vibrating diaphragm that the preparation was come out is as an organic whole with the composite bed connection, need not to set up glue again or other technical means guarantee the connection effect of rubber vibrating diaphragm and composite bed, just can guarantee the fine fixed of the two. And, connect the voice coil loudspeaker voice coil subassembly in the composite bed and deviate from one side of vibrating diaphragm, can transmit the vibration through the composite bed, guarantee the structural strength of rubber vibrating diaphragm. And because the rubber has the advantages of good waterproof performance and good elasticity, the vibrating diaphragm made of the rubber film has better restoring force, strong water pressure resistance and no permanent deformation, can better support the requirements of mobile intelligent equipment such as mobile phones and the like on air tightness and waterproofness, and ensures the sound production effect of the sound production device. Therefore, the technical scheme of the invention can ensure the connection effect of the vibrating diaphragm and the dome, improve the reliability of the loudspeaker and ensure the quality of the loudspeaker.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a sound device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the connection section of the sound device of the present invention disposed toward the magnetic circuit system;

FIG. 3 is a cross-sectional view of one embodiment of the attachment section of the sound device of the present invention extending in the direction of vibration;

fig. 4 is a schematic structural diagram of a diaphragm of a sound production device according to an embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Sound production device	122	Second dome
10	Vibration system	13	Voice coil assembly
				11	Vibrating diaphragm	131	Framework
111	Center part	132	Voice coil body
				112	Folded ring part	14	Connecting segment
113	Fixing part	20	Magnetic circuit system
				1131	Fixed body	21	Magnetic gap
1132	Fixing groove	22	Central magnetic steel
				1133	Spacing section	23	Magnetic conduction basin stand
12	Composite layer	24	Washer
				121	First dome	40	Space of motion
1211	Vent hole

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In some embodiments of the present invention, referring to fig. 1 to 4, the sound device 100 includes a vibration system 10 and a magnetic circuit system 20, the magnetic circuit system 20 is provided with a magnetic gap 21, the vibration system 10 includes:

the vibrating diaphragm 11 is made of rubber;

the composite layer 12 is integrally formed with at least part of the composite layer 12 at the center of the diaphragm 11; and

and the voice coil assembly 13 is connected to one side, deviating from the vibrating diaphragm 11, of the composite layer 12, and the voice coil assembly 13 is movably arranged in the magnetic gap 21.

In the present embodiment, for simplicity of description, the position of the sound generating device 100 when the diaphragm 11 is placed upward is defined as up and down with reference, that is, the side of the diaphragm 11 facing away from the magnetic circuit 20 is up, and the side of the diaphragm 11 facing toward the magnetic circuit 20 is down. In this case, the vibration direction is the up-down direction.

The general structure and principle of the vibration system 10 can refer to the existing form, specifically, the voice coil assembly 13 extends into the magnetic gap 21, the voice coil body 132 of the voice coil assembly 13 is usually formed by winding a metal wire, when the voice coil assembly 13 is connected with an electric signal, the voice coil assembly 13 vibrates up and down under the action of an ampere force in a magnetic field, the voice coil assembly 13 moves to drive the diaphragm 11 to vibrate, and the energy conversion mode is electric energy-mechanical energy-sound energy. To adjust the frequency characteristics of the vibration, the vibration system 10 may further include a weight.

The magnetic circuit system 20 can also refer to the existing structure, for example, the magnetic gap 21 can be formed between the central magnetic steel 22 and the side magnetic steel, or between the central magnetic steel 22 and the side wall of the magnetic conduction basin frame 23. The center magnetic steel 22 may be circular or rectangular in plan view. The central magnetic steel 22 may also be provided with a washer 24, so as to improve the distribution of magnetic induction lines and improve the motion effect of the voice coil assembly 13.

In order to facilitate the installation of the vibration system 10 and the magnetic circuit system 20, the sound generating device 100 further includes a housing for accommodating the vibration system 10 and the magnetic circuit system 20. The housing is provided with a sound outlet for sound to exit at a position corresponding to the vibration system 10.

In some embodiments of the present invention, the diaphragm 11 can generate sound in the range of human auditory sense, for example, the frequency range is 20 to 20000HZ, so that the user can directly receive sound information from the sound generating device 100. It will be appreciated that in other embodiments, the diaphragm 11 may also be used to generate sounds in other frequency ranges, such as "sound codes" in the corresponding range of human hearing, which may be machine-decoded to effect corresponding signal transmission.

In some embodiments of the present invention, the voice coil assembly 13 includes a bobbin 131 and a voice coil body 132, the voice coil body 132 is wound around the bobbin 131, the pad is disposed on the outer side of the voice coil body 132, the voice coil body 132 is configured to be capable of passing electrical signals, the voice coil body 132 is provided with a lead, the lead is connected to the pad, and the bobbin 131 is connected to the first dome 121. The lead wire can be an enameled wire or a bare wire, and when the lead wire is bonded and fixed, a certain metal can be exposed on the surface of the enameled wire, and the exposed metal is bonded to the bonding pad; when the welding fixing is adopted, bare wires can be used, so that the fixing is convenient. The framework 131 is arranged to facilitate fixing of the voice coil body 132, so that the working stability of the voice coil assembly 13 is ensured.

The sound production device 100 of the invention is provided with the vibration system 10 and the magnetic circuit system 20, and the magnetic gap 21 is arranged on the magnetic circuit system 20, and further the vibration system 10 is provided with the vibrating diaphragm 11 made of rubber, the center of the vibrating diaphragm 11 is integrally connected with at least one part of the composite layer 12, and then the voice coil assembly 13 is connected to one side of the composite layer 12 departing from the vibrating diaphragm 11, and the voice coil assembly 13 can move in the magnetic gap 21. Owing to adopt integrated into one piece to set up rubber vibrating diaphragm 11 and composite bed 12, specifically can be the mode of integrative injection moulding for the rubber vibrating diaphragm 11 that makes couples as an organic whole with composite bed 12, need not to set up glue or other technical means again and guarantee the connection effect of rubber vibrating diaphragm 11 and composite bed 12, just can guarantee the fine fixed of the two. And, connect voice coil assembly 13 in the one side that composite bed 12 deviates from vibrating diaphragm 11, can transmit the vibration through composite bed 12, guarantee rubber vibrating diaphragm 11's structural strength. And because the rubber has the advantages of good waterproof performance and good elasticity, the vibrating diaphragm 11 made of the rubber film has better restoring force, strong water pressure resistance and no permanent deformation, can better support the requirements of mobile intelligent equipment such as mobile phones and the like on air tightness and waterproofness, and ensures the sound production effect of the sound production device 100. Therefore, the technical scheme of the invention can ensure the connection effect of the vibrating diaphragm 11 and the dome, improve the reliability of the loudspeaker and ensure the quality of the loudspeaker.

Referring to fig. 1 to 3, in some embodiments of the present invention, the composite layer 12 includes a first dome 121 and a second dome 122 attached to each other, the voice coil assembly 13 is connected to the first dome 121, and the center of the diaphragm 11 is integrally formed with the second dome 122. It is understood that the DOME is the DOME, and the sound device 100 in this case can be understood as the DOME-type sound device 100, and the DOME-type speaker is one of the most widely used dynamic speakers in the sound box, which has the greatest advantages of excellent medium-high frequency response and wide directivity. In addition, the method also has the advantages of good transient characteristic, small distortion, good tone quality and the like.

In some embodiments of the present invention, the first dome 121 and the second dome 122 may be made of a rigid material, specifically, a material with higher rigidity, so that on one hand, the connection stability of the diaphragm after being connected to the voice coil assembly 13 can be ensured, and on the other hand, the vibration effect of the passively radiated diaphragm 11 is ensured to be better, and the vibration effect is improved. Specifically, the first dome 121 and the second dome 122 may be made of a material having a high specific modulus, for example, an aluminum composite material, aluminum, an aluminum magnesium alloy, a magnesium lithium alloy material, carbon fiber, PEN (polyethylene naphthalate), LCP (Liquid Crystal Polymer), a foam, a foamed metal, or the like.

In this embodiment, the first dome 121 and the second dome 122 are made of rigid materials, and as described above, the first dome 121 and the second dome 122 can be well bonded and fixed due to the different properties of the rubber materials. The first spherical cap 121 and the second spherical cap 122 which are bonded with each other are arranged, so that the structural strength of the composite layer 12 is high, the specific modulus is large, specifically, the composite layer can be bonded and fixed through glue or adhesive tape, and therefore vibration energy between the voice coil assembly 13 and the vibrating diaphragm 11 can be effectively transmitted, and the sensitivity of the sounding device 100 is improved. And, owing to with whole second ball top 122 and rubber diaphragm 11 integrated into one piece, be convenient for guarantee integrated into one piece's combination area on the one hand, and then guarantee to combine fixed effect, on the other hand makes injection mold can set up according to the size of second ball top 122, has guaranteed machining efficiency effectively. And, the voice coil assembly 13 is connected to the first dome 121, so that the composite layer 12 is uniformly stressed, and the structural stability of the vibration system 10 is improved. It is understood that in one embodiment, the area of the first dome 121 is smaller than that of the second dome 122, and the composite layer 12 generally has a trapezoidal structure with a larger width at the upper side and a smaller width at the lower side. The voice coil assembly 13 may be connected between the side surface of the first dome 121 and the bottom surface of the second dome 122, thereby ensuring the structural strength of the bobbin 131 in the voice coil assembly 13 and suppressing resonance.

In some embodiments of the present invention, the composite layer 12 includes a first dome 121 and a second dome 122 protruding from the surface of the first dome 121, the first dome 121 and the second dome 122 are an integral structure, and the diaphragm is injection/thermal compression bonded to the top surface and the side surface of the second dome 122. That is, the composite layer 12 is configured as a boss structure, and the diaphragm 11 is injection/thermal compression bonded to the top surface and the side surface of the boss. It is understood that the composite layer 12 in this embodiment is substantially disposed in a shape of "convex", and the diaphragm 11 is bonded to the upper half of the shape of "convex", i.e. the top surface and the side surface of the second dome, by injection molding or hot pressing. So set up to make the rubber vibrating diaphragm 11 of making connect as an organic wholely with composite bed 12, need not to set up glue or other technical means again and guarantee the connection effect of rubber vibrating diaphragm 11 and composite bed 12, just can guarantee that the two is fine fixed. Meanwhile, the combination with the top surface and the side surface of the second spherical top (boss) ensures the combination area of the vibrating diaphragm 11 and the composite layer 12 of the boss structure, and ensures the combination effect.

In some embodiments of the present invention, the first dome 121 and/or the second dome 122 are/is a flat plate structure, and the first dome 121/the second dome 122 of the flat plate structure may facilitate miniaturization of the sound generating device 100.

Referring to fig. 1 to 3, in some embodiments of the present invention, the area of the first ball top 121 is larger than the area of the second ball top 122, and the voice coil assembly 13 is projected onto the first ball top 121 to form a first projection area, where an outer contour of the first projection area includes an outer contour of the second ball top 122. In this embodiment, the area of the first dome 121 is set to be larger than the area of the second dome 122, so that the setting area of the voice coil assembly 13 is larger, and the area of the voice coil body 132 for cutting the magnetic induction lines is larger, thereby improving the quality of the sound generating device 100.

Also, in some embodiments of the present invention, the first dome 121 is further provided with a connection section 14 extending in the vibration direction, and the voice coil assembly 13 is fixed to the connection section 14. In this embodiment, by providing the connection section 14, the voice coil assembly 13 can be attached to the connection section 14, so that the structural strength of the voice coil assembly 13 is increased, and the resonance of the voice coil assembly 13 is suppressed. It can be understood that the connection section 14 forms a certain angle with the top of the ball, and particularly, may be 90 degrees, so as to ensure the maximum bonding area between the connection section 14 and the voice coil assembly 13.

Referring to fig. 2, in some embodiments of the present invention, the connecting segment 14 extends toward the magnetic circuit system 20; so set up for voice coil assembly 13 combines the back with linkage segment 14, can settle in magnetic gap 21 more deeply to improve the magnetic induction line figure of voice coil assembly 13 cutting, improve the sensitivity of vocal device 100, and be convenient for can improve the structural strength of voice coil assembly 13 through linkage segment 14, restrain the resonance.

In some embodiments of the present invention, the connecting segment 14 extends in a direction away from the magnetic circuit system 20. With such an arrangement, after the voice coil assembly 13 is combined with the connecting section 14, the height of the vibration system 10 in the vertical direction is smaller, so that the sound production device 100 with a smaller volume is favorably formed, and the structural strength of the voice coil assembly 13 can be improved through the connecting section 14, so that resonance is suppressed.

In some embodiments of the present invention, the diaphragm 11 is made of liquid silicon rubber or liquid nitrile rubber, and the diaphragm 11 and the second dome 122 are integrated by injection molding. In this embodiment, the liquid rubber is used to manufacture the diaphragm 11 integrally formed with the second dome 122, specifically by an injection molding process. Put into the mould with the part that second dome 122 and shell need be connected, liquid silicone rubber and liquid nitrile rubber are moulded plastics then, form rubber vibrating diaphragm 11 after waiting to solidify, and rubber vibrating diaphragm 11 through macromolecular material preparation has waterproof thoughts good, the good advantage of elasticity to have better restoring force, water pressure resistance can the reinforce, no permanent deformation can support the requirement of vocal ware to gas tightness and waterproof nature.

In some embodiments of the present invention, the diaphragm 11 is made of solid rubber, and the material of the rubber is one of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber, or ethylene propylene diene monomer; or the rubber is a mixture of at least two rubbers of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber or ethylene propylene diene monomer rubber; the diaphragm 11 and the second dome 122 are integrated by thermocompression bonding. The rubber material is formed by a hot-pressing process and is combined on the surface of the second dome 122, so that the connection effect of the vibrating diaphragm 11 and the second dome 122 is ensured without other technical means, good sealing performance and waterproof performance can be achieved, and the assembly efficiency of the vibrating diaphragm 11 and the second dome 122 is improved.

In the inventionIn some embodiments of the present invention, the second ball top 122 is disposed in the middle of the first ball top 121, specifically, the center of the first ball top 121 and the center of the second ball top 122 are concentrically disposed, and it should be noted that when the outer contours of the first ball top 121 and the second ball top 122 are both regular figures, the geometric centers of the first ball top 121 and the second ball top 122 are overlapped, so as to ensure uniformity of vibration transmission. In one embodiment, the relationship between the area S1 of the first dome 121 and the area S2 of the second dome 122 is: S1/S2 is less than or equal to 3, and when the difference between the areas of the first spherical top 121 and the second spherical top 122 is too large, the strength of the first spherical top 121 is easily reduced, and the energy transfer between the voice coil assembly 13 and the diaphragm 11 is affected. The area of the first dome 121 may be set to 23mm²The area of the second dome 122 may be set to 10mm²Thus, the structural strength of the composite layer 12 can be ensured, and it is convenient for the rubber diaphragm 11 and the second dome 122 to have a sufficient molding area.

In some embodiments of the present invention, the diaphragm 11 includes a central portion 111 located at a middle position, a corrugated portion 112 located outside the central portion 111, and a fixing portion 113 connected to the corrugated portion 112, where the central portion 111 and the second dome 122 are integrally formed;

the diaphragm 11 is defined to have a vibration direction, at least a part of the bending portion 112 projects on the first spherical cap 121 along the vibration direction to form a second projection area, and an outer contour of at least a part of the second projection area coincides with the first spherical cap 121.

It should be noted that, at least a portion of the bending portion 112 is projected onto the first dome 121 along the vibration direction to form a second projection area, and at least a portion of the second projection area coincides with the first dome 121, which includes several implementation scenarios, in one implementation scenario, the total area of the diaphragm 11 is kept unchanged, at this time, the area of the central portion 111 connected to the first dome 121 is reduced, and the area of the bending portion 112 is increased, so that at least a portion of the second projection area coincides with the dome, because of the fixing manner that the central portion 111 and the second dome 122 are integrally formed, the diaphragm 11 and the composite layer 12 have a good connection effect, and even in the case that the area of the central portion 111 is reduced, good fixing can be achieved. In an implementation scenario, the total area of the diaphragm 11 is changed, and at this time, the area of the central portion 111 connected to the dome is not changed, the area of the hinge portion 112 is increased, and at least a portion of the first projection area coincides with the dome, so as to increase the linear area of the diaphragm 11 and reduce distortion. In the embodiment of the present invention, since the part of the bending ring portion 112 is overlapped with the top of the ball, that is, the setting width and the extension area of the bending ring portion 112 are increased, the linear area of the diaphragm 11 is increased, and the nonlinear distortion is further reduced.

In some embodiments of the present invention, the central portion 111 has a flat plate-like structure; the central portion 111 is configured as a flat plate structure, so that the installation space of the diaphragm 11 in the height direction can be saved, and the sound generating device 100 can be miniaturized.

Referring to fig. 2 and 3, in some embodiments of the present invention, the first dome 121 is provided with a vent 1211, the first dome 121 and the voice coil assembly 13 enclose a movement space 40, the vent 1211 is communicated with the movement space 40, and the vent 1211 is located in the second projection area. It can be understood that the vent 1211 is a through hole, and the vent 1211 is a hole completely formed by the first dome 121 (the vent 1211 is not configured to be a notch, the first dome 121 is connected to the voice coil assembly 13, and the notch is blocked by the voice coil assembly 13 to form the vent 1211). By providing the vent 1211, the air flow resistance generated by the first dome 121 when the voice coil assembly 13 moves is relieved by the vent 1211, and a part of air can flow out of the movement space 40 from the vent 1211, so that the air circulation of the movement space 40 is improved, and the product distortion is reduced. Further, since the vent 1211 is provided, the mass of the first dome 121 is reduced, it is possible to ensure that the energy transfer loss between the voice coil and the diaphragm 11 is reduced, and the sensitivity of the speaker is improved. And, the airflow generated by the voice coil movement can be used to cool the voice coil assembly 13, allowing the speaker to operate better at higher power levels and longer operating intervals.

In some embodiments of the present invention, a projection of the hinge portion 112 on a horizontal plane perpendicular to the vibration direction forms a third projection region, a projection of the diaphragm 11 on a horizontal plane perpendicular to the vibration direction forms a fourth projection region, and a relation between an area S3 of the third projection region and an area S4 of the fourth projection region is: 0.7 is less than or equal to S3/S4 is less than or equal to 0.9. In this embodiment, the loop-back portion 112 is configured to occupy a larger area of the diaphragm 11, when a ratio S3/S4 of an area S3 of the third projection region formed by the loop-back portion 112 to an area S4 of the fourth projection region formed by the diaphragm 11 is smaller than 0.7, the area of the loop-back portion 112 is made smaller, so that a linear region of the diaphragm 11 is smaller, which is not favorable for reducing speaker distortion, and when a ratio S3/S4 of an area S3 of the third projection region formed by the loop-back portion 112 to an area S4 of the fourth projection region formed by the diaphragm 11 is greater than 0.9, the area of the loop-back portion 112 is made too large, so that a setting area of a portion (including the central portion 111 and the fixing portion 113113) of the diaphragm 11 for fixing is smaller, which is not favorable. When the ratio S3/S4 of the area S3 of the third projection region formed by the loop part 112 to the area S4 of the fourth projection region formed by the diaphragm 11 ranges from 0.7 to 0.9, distortion can be reduced, and the bonding effect of the diaphragm 11 with other components can be effectively ensured. It is understood that, when the value of S3/S4 is 0.71, 0.75, 0.79, 0.8, 0.81, 0.85, 0.89, distortion can be reduced on one hand, and the effect of combining the diaphragm 11 with other components can be effectively ensured on the other hand.

Referring to fig. 1, in some embodiments of the present invention, the width w of the loop part 112 has a value range of: w is more than or equal to 1mm and less than or equal to 2 mm; the diaphragm 11 is defined to have a length direction and a width direction which are perpendicular to each other, both the length direction and the width direction are perpendicular to the vibration direction, and the value range of the width value w of the loop part 112 in the width direction is: w is more than or equal to 1mm and less than or equal to 2 mm. It can be understood that the shape of the diaphragm 11 may be circular, oval, racetrack, or polygonal, when the diaphragm is circular, the loop portion 112 is disposed in a substantially circular ring shape, the length value obtained in the length direction is equal to the width value obtained in the width direction, and when the diaphragm 11 is in a long bar-shaped structure such as oval, racetrack, or rectangular, the width direction is the direction with shorter side length. That is, the value of the edge portion 112 is greater than 1mm, and when the value is smaller than this value, the area of the linear region is easily smaller, and the nonlinear distortion cannot be effectively reduced. When the size is larger than 2mm, the area of the diaphragm is larger, which is not beneficial to the miniaturization of the sounding device. When the value range of w is as follows: w is more than or equal to 1mm and less than or equal to 2mm, so that the area of a linear region is convenient to ensure, the nonlinear distortion is reduced, and the miniaturization of a product is convenient. It is understood that when w takes on the values: 1.1mm, 1.3mm, 1.5mm, 1.7mm, 1.9mm etc., all can be convenient for guarantee the area of linear region on the one hand, reduce nonlinear distortion, on the other hand is convenient for the miniaturization of product. Because the center of the existing diaphragm is attached to the whole surface of the dome, the width of the folded ring part 112 is small, and is generally set to be smaller than 1mm under the condition that the total area of the diaphragm is not changed.

Referring to fig. 1, in some embodiments of the present invention, the height h of the bending portion 112 has a range of: h is more than or equal to 0.9mm and less than or equal to 1.3 mm. It is understood that the height is the height of the loop part 112 in the vibration direction, and when the height of the loop part 112 is less than 0.9mm, the linear area formed by the loop part 112 is also small, and the nonlinear distortion cannot be effectively reduced. When the height is greater than 1.3mm, the height of the folded ring part 112 is large, which is not beneficial to the miniaturization of the sound production device. When the value range of h is as follows: h is more than or equal to 0.9mm and less than or equal to 1.3mm, so that the area of a linear region is convenient to ensure, the nonlinear distortion is reduced, and the miniaturization of a product is convenient. It is understood that when w takes on the values: 1mm, 1.1mm, 1.2mm etc. all can be convenient for on the one hand guarantee linear region's size, reduce nonlinear distortion, on the other hand be convenient for the miniaturization of product. The conventional diaphragm has a central portion attached to the entire surface of the dome, and the total area of the diaphragm is not changed, so that the height of the hinge portion 112 is limited, and is generally set to be less than 0.9 mm. And, under the condition that the height of the ring folding part 112 is smaller, the manufacturing difficulty of the vibrating diaphragm is increased, the cost is increased, and the production efficiency is low.

Referring to fig. 1 to 3, in some embodiments of the present invention, the central portion 111 is provided with an extension extending from the central portion 111 toward the first dome 121 and connected to a side of the second dome 122. In this embodiment, by providing the extension section, the combination area of the rubber diaphragm 11 and the second dome 122 is increased, so as to improve the combination effect of the rubber diaphragm 11 and the second dome 122. It can be understood that, in the present embodiment, the injection cavity formed by the mold is spaced from the second dome 122, so that the injected rubber can flow to the edge of the second dome 122 to form an extension, thereby increasing the bonding area between the rubber and the second dome 122 to the maximum. Of course, it can be understood that if a part of the injection molding cavity is in contact with the second dome 122, and another part of the injection molding cavity forms a gap with the second dome 122, a plurality of discontinuous extension sections are formed by injection molding, so that on one hand, the combination area between the second dome 122 and the rubber diaphragm 11 can be increased to a certain extent, the connection effect can be improved, on the other hand, the quality of the rubber diaphragm 11 can be reduced, the energy transfer loss between the voice coil assembly 13 and the diaphragm 11 can be ensured to be low, and the sensitivity of the sound generating device 100 can be improved.

In some embodiments of the present invention, the extension is disposed around the periphery of the second dome 122; the bottom surface of the first dome 121 is integrated with the second dome 122. Through setting up the extension that encircles for voice coil assembly 13 can evenly combine in the extension, improves voice coil assembly 13's stability. And the area of the extension section can be improved in a surrounding arrangement mode, and after the voice coil assembly 13 is combined, the structural strength of the voice coil assembly 13 can be effectively improved, and resonance is inhibited.

Referring to fig. in some embodiments of the present invention, the height of the fixing portion 113 in the vibration direction is lower than the height of the central portion 111. The height is defined by a vertical axis in the vertical direction, and the fixing portion 113 is located below the position of the central portion 111 on the vertical axis. The corrugated portion 112 of the diaphragm 11 has a larger surface area, which is beneficial to increasing the area of the linear region of the diaphragm 11, and further reducing the non-linear distortion of the sound generating device 100.

Referring to fig. 1 to 3, in some embodiments of the present invention, the fixing portion 113 includes a fixing body 1131 and a fixing groove 1132 disposed on the fixing body 1131, the fixing body 1131 is connected to the hinge portion 112, and the fixing groove 1132 is used for fixing the diaphragm 11. It is understood that the fixing groove 1132 is snapped to the housing, thereby fixing the diaphragm 11. The diaphragm 11 may be injection molded integrally with the housing. Alternatively, the housing may be provided with a recess, and the fixing portion 113 may be coupled to the housing by injection molding or hot pressing. That is, the diaphragm 11 is combined with the housing while being molded. The vibrating diaphragm 11 is combined with the shell in an injection molding or hot pressing mode, so that the fixing steps of the vibrating diaphragm 11 and the shell can be reduced, and the processing efficiency is improved.

In some embodiments of the present invention, the fixing portion 113 further includes a limiting section 1133, one side of the limiting section 1133 is connected to a groove wall of the fixing groove 1132, and the other side of the limiting section extends to a notch of the fixing groove 1132. By arranging the limiting section 1133, the combination area of the fixing portion 113 and the housing is increased, so that the fixing effect of the diaphragm 11 is improved. The specific implementation manner is similar to the manner of forming the extension section, and is not described herein.

The invention also proposes an electronic device comprising a vibration system 10 and a magnetic circuit system 20, said magnetic circuit system 20 being provided with a magnetic gap 21, said vibration system 10 comprising: the vibrating diaphragm 11 is made of rubber; the composite layer 12 is integrally formed with at least part of the composite layer 12 at the center of the diaphragm 11; and the voice coil assembly 13, the voice coil assembly 13 is connected to one side of the composite layer 12 departing from the vibrating diaphragm 11, and the voice coil assembly 13 is movably arranged in the magnetic gap 21.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sound-producing device comprising a vibration system and a magnetic circuit system, the magnetic circuit system being provided with a magnetic gap, the vibration system comprising:

the vibrating diaphragm is made of rubber;

2. The sound production device of claim 1, wherein the composite layer comprises a first dome and a second dome attached to each other, the voice coil assembly is connected to the first dome, the center of the diaphragm is integrally formed with the second dome, and the center of the first dome and the center of the second dome are concentrically arranged;

3. The sound production device of claim 2, wherein the area of the first dome is larger than the area of the second dome, the voice coil assembly projects onto the first dome to form a first projection area, and the outer contour of the first projection area includes the outer contour of the second dome;

and/or the first spherical top and the second spherical top are fixedly bonded.

4. The sound production device of claim 2, wherein the diaphragm is made of liquid silicone rubber or liquid nitrile rubber, and the diaphragm and the second dome are integrated through injection molding.

5. The sounding device according to claim 2, wherein the diaphragm is made of solid rubber, and the rubber is made of one of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber or ethylene propylene diene monomer rubber; or the rubber is a mixture of at least two rubbers of solid silicone rubber, ethylene acrylate rubber, hydrogenated nitrile rubber, solid nitrile rubber or ethylene propylene diene monomer rubber; the vibrating diaphragm and the second ball top are combined into a whole through hot pressing.

6. The sounding device according to claim 2, wherein the diaphragm comprises a central portion located at the middle position, a corrugated portion located at the outer side of the central portion, and a fixing portion connected to the corrugated portion, and the central portion and the second dome are integrally formed;

7. The sounding device according to claim 6, wherein the projection of the hinge portion on a horizontal plane perpendicular to the vibration direction forms a third projection area, the projection of the diaphragm on a horizontal plane perpendicular to the vibration direction forms a fourth projection area, and the area S3 of the third projection area and the area S4 of the fourth projection area are in a relationship: 0.7 is less than or equal to S3/S4 is less than or equal to 0.9.

8. The sound-producing device of claim 6, wherein the width w of the collar portion ranges from: w is more than or equal to 1mm and less than or equal to 2 mm;

9. The sound device of claim 6, wherein the central portion is a plate-like structure;

10. The sound production device of claim 6, wherein the central portion is provided with an extension section extending from the central portion towards the first dome and connecting with a side of the second dome; the extension section is arranged around the periphery of the second dome.

11. The sound production device of claim 6, wherein the fixed portion has a height in the direction of vibration that is lower than a height of the central portion.

12. The sound production device of claim 6, wherein the fixing portion comprises a fixing body and a fixing groove formed in the fixing body, the fixing body is connected to the corrugated rim portion, and the fixing groove is used for fixing the diaphragm.

13. The sound production device of claim 12, wherein the fixing portion further comprises a stopper section, one side of the stopper section is connected to a groove wall of the fixing groove, and the other side of the stopper section extends toward the notch of the fixing groove.

14. The sound production device of any one of claims 2-13, wherein the material of the first dome and the second dome comprises a rigid material; the rigid material includes at least one of a carbon fiber material, a metal material, or a foamed metal.

15. An electronic device comprising a sound producing device as claimed in any one of claims 1 to 14.