CN116684790A - Application device, sounding device and vibration system thereof - Google Patents

Abstract

The invention discloses an application device, a sound generating device and a vibration system thereof, comprising: the cone basin comprises a cone and a folding ring, the folding ring surrounds the outside of the cone, and the inner edge of the folding ring is connected with the outer edge of the cone; the damping unit surrounds outside the cone body, the damping unit is located on the opening side of the folding ring, the inner edge of the damping unit is connected with the folding ring and the junction of the cone body, the outer edge of the damping unit is connected with the outer edge of the folding ring, a closed damping cavity is formed by enclosing the damping unit and the folding ring, and the damping unit and the damping cavity inhibit the splitting vibration of the cone body and the folding ring so as to reduce anti-resonance between the cone body and the folding ring. The invention can reduce the anti-resonance amplitude between the folded ring and the cone, improves the acoustic performance of the product, has high sensitivity, and has the advantages of easy manufacture, mass production and high production efficiency.

Description

Application device, sounding device and vibration system thereof

Technical Field

The invention relates to the technical field of electroacoustic technology, in particular to an application device, a sound generating device and a vibration system thereof.

Background

Application devices, such as loudspeakers, are important acoustic components in electronic devices, which are a type of transducer device that converts electrical signals into acoustic signals. With the continuous progress and innovation of the technology, the structural design of the traditional loudspeaker is also continuously updated and changed.

In the design of a vibration system in the existing loudspeaker, a cone basin is generally composed of a cone and a folded ring, and as sound velocity and wavelength of sound waves in the cone and the folded ring are different under the same frequency, the folded ring and the cone vibrate in different forms, the edge of the cone and the folded ring easily generate large-amplitude split vibration, so that an anti-resonance state is generated between the cone and the folded ring, the anti-resonance amplitude is large, an 'discounting' phenomenon is generated on an FR curve, namely, a sudden rising and suddenly falling situation occurs between the peaks and the troughs of the FR curve, the anti-resonance amplitude is large, and the acoustic performance of a product is influenced. For this situation, the problem of large anti-resonance amplitude is currently solved by adopting the following three modes:

(1) The folding ring is locally thickened;

(2) A damper (TMD) is additionally added on the inner surface or the outer surface of the folded ring;

(3) And coating a high damping coating on the inner surface or the outer surface of the folded ring.

However, the mode (1) and the mode (2) both increase the vibration quality of the vibration system, greatly reducing the sensitivity of the product and deteriorating the sensitivity. The process precision of the (3) mode is not well controlled, the uniformity of the folded ring is poor, the manufacture is not easy, the batch production is not facilitated, and the production efficiency is reduced.

Disclosure of Invention

The invention mainly aims to provide an application device, a sound production device and a vibration system thereof, and aims to solve the problems that the sensitivity of a product is poor, the manufacturing is difficult and the like caused by a mode of large anti-resonance amplitude in a cone and a folded ring in the prior art.

In order to achieve the above object, the present invention provides a vibration system of a sound emitting device, the vibration system of the sound emitting device comprising:

the cone basin comprises a cone and a folding ring, the folding ring surrounds the outside of the cone, and the inner edge of the folding ring is connected with the outer edge of the cone;

the damping unit surrounds outside the cone body, the damping unit is located on the opening side of the folding ring, the inner edge of the damping unit is connected with the folding ring and the junction of the cone body, the outer edge of the damping unit is connected with the outer edge of the folding ring, a closed damping cavity is formed by enclosing the damping unit and the folding ring, and the damping unit and the damping cavity inhibit the splitting vibration of the cone body and the folding ring so as to reduce anti-resonance between the cone body and the folding ring.

Optionally, the ring is formed by interior to the appearance first connecting portion, ring portion and the second connecting portion that connect gradually, first connecting portion with the outer fringe of cone and the inner edge of damping unit is connected, ring portion is towards keeping away from the bellied arc structure of direction of damping unit, the second connecting portion with the outer fringe of damping unit is connected.

Optionally, the first connecting portion with one side of cone is connected, damping unit is from interior to appearance first installation department, deformation portion and the second installation department that connects gradually, wherein, first installation department with deviate from on the cone one side of first connecting portion is connected, deformation portion with the ring portion corresponds the setting, the second installation department with the second connecting portion is connected.

Optionally, the deformation portion is formed with an arc-shaped protrusion protruding toward the folded-over portion and/or protruding away from the folded-over portion.

Optionally, the deformation portion extends in a corrugated shape from the first mounting portion toward the second mounting portion.

Optionally, the stiffness of the cone, the stiffness of the damping unit and the stiffness of the bellows decrease in sequence.

Optionally, the young modulus of the cone is a, the young modulus of the damping unit is b, and the young modulus of the folding ring is c, wherein b is more than or equal to 5c and less than or equal to 0.1a.

Optionally, the damping units are arranged with equal thickness, and the thickness is 0.05 mm-0.5 mm.

Optionally, the length of the folded ring in the direction from the inner edge to the outer edge is L1 when the folded ring is in the flattened state, and the length of the damping unit in the direction from the inner edge to the outer edge is L2 when the damping unit is in the flattened state, wherein 1.2L1 is less than or equal to L2 and less than or equal to 5L1.

Optionally, the damping cavity is provided with gas, and the damping unit and the gas in the damping cavity inhibit the split vibration of the cone and the folded ring so as to reduce anti-resonance between the cone and the folded ring.

Optionally, the damping unit is an airtight material product;

or alternatively, the process may be performed,

the damping unit is a breathable material product with the air permeability not exceeding 1%;

still alternatively, the method may comprise,

the damping unit is provided with a plurality of ventilation holes which are distributed at intervals, and the aperture of each ventilation hole is 0.05 mm-0.5 mm.

Optionally, the material of the folding ring is rubber or foam, and the material of the damping unit is one or more of PU, TPU, silk membrane, teflon or polymer crystalline material.

The invention also provides a sound generating device, which comprises:

a housing;

the magnetic circuit system is arranged on the shell and forms a magnetic gap;

the vibration system according to any one of the above claims, further comprising a voice coil and an elastic support piece, wherein one end of the voice coil is connected with the cone, the other end of the voice coil is suspended in the magnetic gap, the elastic support piece is positioned on one side of the damping unit, which is away from the folded ring, the elastic support piece surrounds the voice coil, the inner edge of the elastic support piece is connected with the voice coil, the outer edge of the elastic support piece is connected with the shell, and one side of the outer edge of the damping unit, which is away from the folded ring, is connected with the shell.

Optionally, a first step is formed on the housing, and a side of the outer edge of the damping unit, which faces away from the folding ring, is supported and connected to the first step.

Optionally, the elastic support piece extends in a corrugated shape from the inner edge to the outer edge.

Optionally, the outer edge of the elastic support piece extends outwards to form an extension part, a second step is formed on the shell, and one side of the extension part, which is away from the damping unit, is supported and connected with the second step.

Optionally, the elastic support piece is made of aramid fiber or cotton cloth.

The invention also provides an application device, which comprises a shell and the sound generating device contained in the shell.

In the invention, the damping unit is designed, the damping unit and the folding ring are enclosed to form a closed damping cavity, the damping unit and the damping cavity have a certain supporting effect on the folding ring, and the damping unit, the damping cavity and the folding ring can form a structure similar to a tuned mass damper, so that vibration in different directions and frequencies can be reduced. When the vibration system is in the vibration process, the cone and the folded ring can generate split vibration, in particular, the edge of the cone and the folded ring can generate split vibration, so that anti-resonance conditions occur between the cone and the folded ring, and an anti-resonance state is presented.

Under the condition that anti-resonance occurs between the cone and the folded ring, the vibration form of the folded ring is transmitted to the damping unit through the damping cavity, so that the damping unit vibrates simultaneously, and the reverse force generated by the vibration of the damping unit acts on the folded ring, so that the split vibration of the cone and the folded ring is restrained, and the anti-resonance between the cone and the folded ring is reduced. Moreover, the inertia force of the folded ring and the damping cavity can achieve the effects of resonance energy absorption and reduction of the split vibration of the cone and the folded ring, so that the split vibration of the edge of the cone and the folded ring can be restrained through the damping unit and the damping cavity, the anti-resonance between the folded ring and the cone is restrained, the vibration form of the folded ring is adjusted to be close to the vibration form of the cone, the anti-resonance condition between the cone and the folded ring is restrained and reduced, the anti-resonance amplitude is reduced, the abnormal vibration amplitude between the cone and the folded ring is further reduced, the phenomenon of 'discounting' appearing in an FR curve is eliminated, the FR curve is smoothed, and the acoustic performance of a product is improved.

Compared with the mode of locally thickening the folding ring and additionally adding a damper (TMD) on the inner surface or the outer surface of the folding ring in the prior art, the vibration damping device only needs to design the damping unit on the opening side of the folding ring in the vibration system, and the damping unit has light vibration mass which is increased in comparison with the mode of thickening the folding ring and the mode of additionally adding the damper on the folding ring, has small influence on the sensitivity of the product and has high sensitivity of the product. Compared with the mode of coating the high damping coating on the inner surface or the outer surface of the folded ring, which is improved in the background art, the damping unit is arranged on the opening side of the folded ring and forms a closed damping cavity with the folded ring, the process precision control is not needed to be considered too much, the consistency of the folded ring is ensured, the manufacture is easy, the batch production is facilitated, and the production efficiency is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a sound emitting device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a sound emitting device according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a partial structure of a sound emitting device according to an embodiment of the present invention;

FIG. 4 is a graph comparing the simulated FR curve of the prior art product with the simulated FR curve of the product of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Sounding device	143	A second mounting part
10	Vibration system	144	Arc-shaped bulge
				11	Cone basin	15	Damping cavity
12	Cone body	16	Voice coil
				13	Folding ring	17	Elastic support piece
131	First connecting part	171	Extension part
				132	Folded ring part	20	Shell body
133	Second connecting part	21	First step
				14	Damping unit	22	Second step
141	A first mounting part	30	Magnetic circuit system
				142	Deformation part	31	Magnetic gap

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The present invention proposes a vibration system 10 of a sound emitting device 100.

As shown in fig. 1 to 3, the vibration system 10 of the sound emitting device 100 includes a cone 11 and a damping unit 14, wherein the cone 11 includes a cone 12 and a folder 13, the folder 13 surrounds the cone 12, and an inner edge of the folder 13 is connected with an outer edge of the cone 12; the damping unit 14 surrounds the cone 12, the damping unit 14 is located at the opening side of the folded ring 13, the inner edge of the damping unit 14 is connected with the folded ring 13 and the junction of the cone 12, the outer edge of the damping unit 14 is connected with the outer edge of the folded ring 13, a closed damping cavity 15 is enclosed between the damping unit 14 and the folded ring 13, and the damping unit 14 and the damping cavity 15 inhibit the split vibration of the cone 12 and the folded ring 13 so as to reduce anti-resonance between the cone 12 and the folded ring 13.

The anti-resonance is generated because: the speed of sound is different in propagation speed in different media and the wavelength is different at the same frequency. The sound waves have different propagation speeds (sound speeds) in different media; the sound velocity c at the same temperature and pressure satisfies the following formula:

c＝λ*f,

wherein: c represents the sound velocity; ks represents stiffness, i.e., bulk modulus of elasticity; ρ represents the object density, λ represents the wavelength; f represents the acoustic frequency.

It can be seen that the greater the stiffness coefficient of a substance, the greater the speed of sound at the same pressure and temperature. In the vibration system 10 of the sound emitting device 100, the cone 12 is generally much stiffer than the folded ring 13, and the propagation velocity of sound in the cone 12 is greater than the propagation velocity in the folded ring 13. At the same frequency, the wavelength of sound at cone 12 is greater than the wavelength of sound at the folded ring 13. The sound velocity and the wavelength of the sound wave in the cone 12 and the folded ring 13 are different, so that the vibration forms of the cone basin 11 and the folded ring 13 are different, the edge of the cone 12 and the folded ring 13 are easy to generate large-amplitude segmentation vibration, anti-resonance is generated, and the FR curve is folded, as shown by the broken line in fig. 4.

In the invention, by designing the damping unit 14, and the damping unit 14 is located at the opening side of the folding ring 13, the inner edge of the damping unit 14 is connected with the junction of the folding ring 13 and the cone 12, and the outer edge of the damping unit 14 is connected with the outer edge of the folding ring 13 to enclose a closed damping cavity 15 between the damping unit 14 and the folding ring 13, it can be understood that the damping cavity 15 can be in an absolute closed state, and in order to balance the pressure difference between the damping cavity 15 and the outside, the damping cavity 15 can be in an incomplete closed state and can be in a closed state.

Because the damping unit 14 and the folding ring 13 are enclosed to form a closed damping cavity 15, the damping unit 14 and the damping cavity 15 have a certain supporting effect on the folding ring 13, and the damping unit 14, the damping cavity 15 and the folding ring 13 can form a structure similar to a tuned mass damper, so that vibration in different directions and frequencies can be reduced. When the vibration system 10 is in the vibration process, the cone 12 and the folded ring 13 can generate split vibration, specifically, the edge of the cone 12 and the folded ring 13 can generate split vibration, so that anti-resonance condition occurs between the cone 12 and the folded ring 13, and an anti-resonance state is presented.

In the case of anti-resonance between the cone 12 and the folded ring 13, the vibration form of the folded ring 13 is transferred to the damping unit 14 through the damping cavity 15, so that the damping unit 14 vibrates simultaneously, and a reverse force generated by the vibration of the damping unit 14 acts on the folded ring 13, thereby inhibiting the split vibration of the cone 12 and the folded ring 13 and reducing the anti-resonance between the cone 12 and the folded ring 13. Moreover, because the inertia force of the folded ring 13 and the damping cavity 15 can achieve the effects of resonance energy absorption and reducing the split vibration of the cone 12 and the folded ring 13, the edge of the cone 12 and the split vibration of the folded ring 13 can be restrained through the damping unit 14 and the damping cavity 15, so as to restrain the anti-resonance between the folded ring 13 and the cone 12, adjust the vibration form of the folded ring 13 to be close to the vibration form of the cone 12, restrain and reduce the anti-resonance condition between the cone 12 and the folded ring 13, reduce the anti-resonance amplitude, further reduce the abnormal vibration amplitude between the cone 12 and the folded ring 13, eliminate the 'discounting' phenomenon of the FR curve, smooth the FR curve, and improve the acoustic performance of the product as shown by the solid line in fig. 4. The vibration system 10 of the sound emitting device 100 of the present invention can be applied to high frequency products in 1k to 4 k.

In addition, compared with the mode of locally thickening the folding ring 13 and additionally adding a damper (TMD) on the inner surface or the outer surface of the folding ring 13 in the prior art, the vibration system provided by the invention only needs to design the damping unit 14 on the opening side of the folding ring 13 in the vibration system 10, and the damping unit 14 has light vibration mass compared with the mode of thickening the folding ring 13 and the mode of additionally adding the damper on the folding ring 13, and has small influence on the sensitivity of a product and high sensitivity of the product. Compared with the mode of coating the high damping coating on the inner surface or the outer surface of the folded ring 13, which is improved in the background art, the damping unit 14 is arranged on the opening side of the folded ring 13 and forms the closed damping cavity 15 with the folded ring 13, so that the process precision control is not needed to be considered excessively, the consistency of the folded ring 13 is ensured, the manufacture is easy, the batch production is facilitated, and the production efficiency is high.

In an embodiment, the folded ring 13 is formed from inside to outside, and the first connecting portion 131, the folded ring portion 132 and the second connecting portion 133 are sequentially connected, where the first connecting portion 131 is connected to the outer edge of the cone 12 and the inner edge of the damping unit 14, the folded ring portion 132 has an arc structure protruding in a direction away from the damping unit 14, and the second connecting portion 133 is connected to the outer edge of the damping unit 14.

Specifically, the vibration system 10 vibrates in the vertical direction as shown in fig. 2, i.e., in the up-down direction. In the folded ring 13, the protruding direction of the folded ring portion 132 faces upwards, so that a sufficient vibration space is provided, the height of the folded ring portion 132 is increased, and the acoustic performance of a product is improved. In addition, in the ring 13, the first connecting portion 131 is connected with the outer edge of the cone 12 and the inner edge of the damping unit 14, the ring 132 is connected between the first connecting portion 131 and the second connecting portion 133, and the second connecting portion 133 is connected with the outer edge of the damping unit 14, so that the cone 12, the ring 13 and the damping unit 14 are assembled, and a closed damping cavity 15 is formed between the ring 13 and the damping unit 14.

In an embodiment, the first connecting portion 131 is connected to one side of the cone 12, the damping unit 14 includes a first mounting portion 141, a deformation portion 142 and a second mounting portion 143 sequentially connected from inside to outside, wherein the first mounting portion 141 is connected to one side of the cone 12 facing away from the first connecting portion 131, the deformation portion 142 is disposed corresponding to the ring-folding portion 132, and the second mounting portion 143 is connected to the second connecting portion 133.

As shown in fig. 2 and 3, the first connecting portion 131 is connected with the upper side of the cone 12, the first mounting portion 141 is connected with the lower side of the cone 12 in the damping unit 14, the deformation portion 142 is correspondingly arranged with the folded ring portion 132, the deformation portion 142 is connected between the first mounting portion 141 and the second mounting portion 143, the second mounting portion 143 is connected with the second connecting portion 133 of the folded ring 13, the assembly of the damping unit 14 with the cone 12 and the folded ring 13 is achieved, and the deformation portion 142 is correspondingly arranged with the folded ring portion 132, so that the folded ring portion 132 with larger deformation on the folded ring 13 is subjected to key suppression and damping through the deformation portion 142, the structural design is reasonable, and the anti-resonance amplitude is further reduced.

In one embodiment, the deformation portion 142 is formed with an arcuate projection 144 that projects toward the collar portion 132 and/or projects away from the collar portion 132. It will be appreciated that the deformation portion 142 is formed with an upwardly and/or downwardly convex arc-shaped protrusion 144, so that the deformation portion 142 has better suppressing and damping effects and better effects of reducing the anti-resonance amplitude between the folder ring 13 and the cone 12.

Further, the deformation portion 142 extends in a corrugated shape from the first mounting portion 141 toward the second mounting portion 143, the deformation portion 142 includes at least one upwardly protruding arc-shaped protrusion 144 and at least one downwardly protruding arc-shaped protrusion 144, and the two arc-shaped protrusions 144 are alternately distributed, so that the damping effect thereof is greatly improved. In addition, the corrugated structure may reduce stress concentrations, increase fatigue strength, and reduce the risk of breakage of the damping unit 14. In addition, the deformation portion 142 of the damping unit 14 extends in a corrugated shape, so that the resonance strength can be effectively inhibited in the vibration process of the damping unit 14, the fracture risk is avoided, and the compliance of the damping unit 14 is kept good.

In one embodiment, the stiffness of the cone 12, the stiffness of the damping unit 14 and the stiffness of the bellows 13 decrease in sequence. Namely, the rigidity of the damping unit 14 designed by the invention is between the rigidity of the cone 12 and the rigidity of the folded ring 13 so as to balance the sound velocity difference and the wavelength difference between the cone 12 and the folded ring 13, inhibit and reduce the difference of vibration modes of the cone 12 and the folded ring 13 and improve the inhibition and damping effects of the damping unit 14.

Further, the young's modulus of the cone 12 is a, the young's modulus of the damping unit 14 is b, and the young's modulus of the folding ring 13 is c, wherein b is more than or equal to 5c and less than or equal to 0.1a, so that the rigidity of the damping unit 14 is set within a reasonable range, the rigidity of the damping unit 14 is not excessively high or excessively low, and the damping effect of the damping unit 14 is further improved.

In an embodiment, the damping unit 14 is arranged with equal thickness, so that the manufacturing is convenient, the damping effect is uniform, the influence on the acoustic performance of the product is avoided, and the thickness of the damping unit 14 is 0.05 mm-0.5 mm, so that the thickness of the damping unit 14 is set within a reasonable range, the damping unit 14 is not too thick or too thin, the damping effect is ensured, the quality of the damping unit 14 is reduced, and meanwhile, the compliance of the vibration system 10 is not influenced.

In an embodiment, the length of the folded ring 13 in the direction from the inner edge to the outer edge thereof in the flattened state is L1, and the length of the damping unit 14 in the direction from the inner edge to the outer edge thereof in the flattened state is L2, wherein 1.2L1 +.L2+.5L1, i.e. the length of the damping unit 14 in the flattened state is set within a reasonable range to provide sufficient vibration displacement without interfering with the vibration of the folded ring 13.

In an embodiment, the damping chamber 15 contains gas, and the damping unit 14 and the gas in the damping chamber 15 suppress the split vibration of the cone 12 and the ring 13 to reduce anti-resonance between the cone 12 and the ring 13. The damping chamber 15 is filled with a gas, which may be air, or other gas that dampens the vibration of the grommet 13, and this embodiment is described using air as an example.

It will be appreciated that the air in the damping chamber 15 also has a supporting effect on the grommet 13, and that the damping unit 14, the damping chamber 15 and the air therein, the grommet 13 can form a structure resembling a tuned mass damper, which reduces vibrations in different directions and frequencies. When the vibration system 10 generates anti-resonance between the cone 12 and the folded ring 13 during the vibration process, the vibration form of the folded ring 13 is transferred to the damping unit 14 through the damping cavity 15 and the gas therein, so that the damping unit 14 vibrates simultaneously, and the reverse force generated by the vibration of the damping unit 14 acts on the folded ring 13, thereby inhibiting the split vibration of the cone 12 and the folded ring 13 and reducing the anti-resonance between the cone 12 and the folded ring 13. Moreover, because the inertia force of the folded ring 13 and the damping cavity 15 and the gas therein can achieve the effects of resonance energy absorption and reduction of the split vibration of the cone 12 and the folded ring 13, the split vibration of the edge of the cone 12 and the folded ring 13 can be effectively restrained through the damping unit 14, the damping cavity 15 and the gas therein, the anti-resonance between the folded ring 13 and the cone 12 is restrained, the vibration form of the folded ring 13 is adjusted to be close to the vibration form of the cone 12, the anti-resonance condition between the cone 12 and the folded ring 13 is restrained and reduced, the anti-resonance amplitude is reduced, the abnormal vibration amplitude between the cone 12 and the folded ring 13 is further reduced, the phenomenon of 'discounting' appearing in an FR curve is eliminated, the FR curve is smoothed, and the acoustic performance of a product is further improved.

In one embodiment, the damping unit 14 is made of air-impermeable material, so as to ensure the tightness of the damping cavity 15 and ensure the damping effect.

In another embodiment, the damping unit 14 is made of air-permeable material with air permeability not more than 1%, the air permeability not more than 1% has little influence on the tightness of the damping cavity 15, the damping cavity 15 is close to the airtight state, and meanwhile, the pressure difference between the damping cavity 15 and the outside can be balanced, so that the damping unit 14 and the folding ring 13 are prevented from being damaged.

In yet another embodiment, the damping unit 14 is provided with a plurality of ventilation holes which are distributed at intervals, and the aperture of the ventilation holes is 0.05mm to 0.5mm. The shape of the ventilation holes, the number of the ventilation holes and the distribution mode can be flexibly set according to actual needs, so long as the damping effect of the damping cavity 15 is not affected, and the pressure difference between the damping cavity 15 and the outside can be balanced. Preferably, the aperture of the ventilation holes is set to be 0.05 mm-0.5 mm, so that the damping cavity 15 is basically close to a density state, the damping effect of the damping cavity 15 is not influenced, the pressure difference between the damping cavity 15 and the outside is balanced, and the damping unit 14 and the folding ring 13 are prevented from being damaged.

In an embodiment, the material of the folding ring 13 is rubber or foam, so as to meet the rigidity requirement of the folding ring 13. The damping unit 14 is made of one or more of PU (polyurethane), TPU (thermoplastic polyurethane), silk membrane, teflon, polymer crystal material or PEEK (polyether ether ketone), so as to meet the rigidity requirement of the damping unit 14. It can be appreciated that the silk membrane and the Teflon are made of slightly air-permeable materials, and the damping unit 14 can be made of silk membrane or Teflon with air permeability not exceeding 1%. The PU, TPU and macromolecule crystallization materials are airtight materials.

It should be noted that, in the vibration system 10 of the sound generating device 100 of the present invention, the mass, rigidity, shape and material of the damping unit 14 can be flexibly set according to the actual situation.

The invention also provides a sound generating device 100, wherein the sound generating device 100 comprises a shell 20, a magnetic circuit system 30 and the vibration system 10, the magnetic circuit system 30 is arranged on the shell 20, and a magnetic gap 31 is formed in the magnetic circuit system 30; the vibration system 10 further comprises a voice coil 16 and an elastic support piece 17, one end of the voice coil 16 is connected with the cone 12, the other end of the voice coil 16 is suspended in the magnetic gap 31, the elastic support piece 17 is located on one side, away from the bending ring 13, of the damping unit 14, the elastic support piece 17 surrounds the voice coil 16, the inner edge of the elastic support piece 17 is connected with the voice coil 16, the outer edge of the elastic support piece 17 is connected with the shell 20, and one side, away from the bending ring 13, of the outer edge of the damping unit 14 is connected with the shell 20.

The sound emitting device 100 of the present invention may be a speaker or other sound emitting device, and the sound emitting device 100 of the present invention is illustrated by way of example as a speaker. The specific structure of the vibration system 10 in the sound generating device 100 refers to the above embodiment, and since the sound generating device 100 adopts all the technical solutions of all the embodiments, at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

In addition, as shown in fig. 1 to 3, the upper end of the voice coil 16 is connected to the cone 12, specifically to the middle of the cone 12, so as to realize the assembly between the voice coil 16 and the cone 11. The lower end of the voice coil 16 is suspended in the magnetic gap 31, and when the voice coil 16 is connected with an electric signal, the voice coil vibrates up and down under the action of ampere force in a magnetic field, so that the cone 11 and the damping unit 14 are driven to vibrate up and down synchronously, and sound waves are generated. The elastic support piece 17 is located the downside of damping unit 14, and the elastic support piece 17 surrounds outside voice coil 16, and the inner edge of elastic support piece 17 is connected with voice coil 16, and the outer fringe of elastic support piece 17 is connected with casing 20, realizes the assembly between elastic support piece 17, voice coil 16 and the casing 20, and elastic support piece 17 can play the centering support effect when voice coil 16 vibrates from top to bottom, prevents that voice coil 16 from taking place the polarization.

In the vibration system 10, the cone 11, the voice coil 16 and the elastic support piece 17 form a main vibration system 10, and the damping unit 14 is adapted to the main vibration system 10, so that under the action of the damping unit 14, the damping of the main vibration system 10 is increased, and the anti-resonance of the main vibration system 10 is reduced.

As shown in fig. 2 and 3, a first step 21 is formed on the housing 20, and a side of the outer edge of the damping unit 14 facing away from the folder ring 13 is supported and coupled to the first step 21. The first step 21 is provided to facilitate assembly with the outer edge of the damping unit 14 and the outer edge of the bellows 13.

In one embodiment, the elastic support 17 extends in a corrugated shape from its inner edge to its outer edge, and the corrugated structure reduces stress concentration, increases fatigue strength, and reduces the risk of breakage of the elastic support 17. Moreover, since the elastic support piece 17 extends in a corrugated shape, that is, the corrugations on the elastic support piece are in an arc structure protruding in the vertical direction, the elastic support piece 17 can effectively inhibit the resonance strength even under the condition that the voice coil 16 vibrates and displaces greatly in the vertical direction in the process of following the voice coil 16, the fracture risk is avoided, the compliance of the elastic support piece 17 is kept good, enough displacement can be provided, the vibration of the voice coil 16 is not influenced, and the product performance is optimized. Meanwhile, the elastic support piece 17 also restrains the reciprocating vibration of the voice coil 16 according to the vibration deflection state of the voice coil 16 through the elastic deformation effect, so that the polarization of the voice coil 16 is prevented, the reciprocating vibration of the voice coil 16 is more stable, and the better centering capability is achieved.

In one embodiment, the outer edge of the elastic support 17 extends outwards to form an extension 171, the housing 20 is formed with a second step 22, and a side of the extension 171 facing away from the damping unit 14 is supported and connected to the second step 22. The arrangement of the second step 22 facilitates assembly with the extension portion 171, specifically, the lower side of the extension portion 171 is supported and connected to the second step 22, and the structure design is reasonable and the assembly is convenient.

In one embodiment, the elastic support piece 17 is made of aramid fiber or cotton cloth, and is easy to obtain materials and convenient to manufacture.

The invention also provides an application device, which comprises a shell and the sounding device 100 accommodated in the shell. The application device may be an intelligent terminal or a vehicle. The specific structure of the sound emitting device 100 in the application apparatus refers to the above embodiment, and since the application apparatus adopts all the technical solutions of all the embodiments, the application apparatus at least has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims (18)

1. A vibration system of a sound emitting device, the vibration system of the sound emitting device comprising:

the cone basin comprises a cone and a folding ring, the folding ring surrounds the outside of the cone, and the inner edge of the folding ring is connected with the outer edge of the cone;

the damping unit surrounds outside the cone body, the damping unit is located on the opening side of the folding ring, the inner edge of the damping unit is connected with the folding ring and the junction of the cone body, the outer edge of the damping unit is connected with the outer edge of the folding ring, a closed damping cavity is formed by enclosing the damping unit and the folding ring, and the damping unit and the damping cavity inhibit the splitting vibration of the cone body and the folding ring so as to reduce anti-resonance between the cone body and the folding ring.

2. The vibration system of the sound emitting device according to claim 1, wherein the folded ring is formed from inside to outside with a first connecting portion, a folded ring portion and a second connecting portion connected in this order, the first connecting portion is connected with the outer edge of the cone and the inner edge of the damping unit, the folded ring portion is in an arc-shaped structure protruding in a direction away from the damping unit, and the second connecting portion is connected with the outer edge of the damping unit.

3. The vibration system of the sound emitting device according to claim 2, wherein the first connecting portion is connected to one side of the cone, the damping unit is formed by sequentially connecting a first mounting portion, a deformation portion and a second mounting portion from inside to outside, wherein the first mounting portion is connected to one side of the cone facing away from the first connecting portion, the deformation portion is disposed corresponding to the folded ring portion, and the second mounting portion is connected to the second connecting portion.

4. The vibration system of the sound emitting device according to claim 3, wherein the deformation portion is formed with an arc-shaped protrusion protruding toward the folded-over portion and/or protruding away from the folded-over portion.

5. The vibration system of the sound emitting device of claim 4, wherein the deformation portion extends in a wavy shape from the first mounting portion toward the second mounting portion.

6. The vibration system of the sound emitting device of any one of claims 1-5, wherein the stiffness of the cone, the stiffness of the damping unit, and the stiffness of the gimbal ring decrease in sequence.

7. The vibration system of the sound emitting device of claim 6, wherein the young's modulus of the cone is a, the young's modulus of the damping unit is b, and the young's modulus of the folded ring is c, wherein 5c is equal to or less than b is equal to or less than 0.1a.

8. The vibration system of sound emitting device according to any one of claims 1 to 5, wherein the damping units are provided with equal thickness and have a thickness of 0.05mm to 0.5mm.

9. The vibration system of the sound generating device according to any one of claims 1 to 5, wherein the folded ring has a length L1 in a direction from an inner edge to an outer edge thereof in a flattened state, and the damping unit has a length L2 in a direction from an inner edge to an outer edge thereof in a flattened state, wherein 1.2L1.ltoreq.l2.ltoreq.5l1.

10. The vibration system of the sound emitting device of any one of claims 1 to 5, wherein the damping chamber has a gas therein, and the damping unit and the gas in the damping chamber suppress the divided vibration of the cone and the folded ring to reduce anti-resonance between the cone and the folded ring.

11. The vibration system of the sound emitting device of any one of claims 1 to 5,

the damping unit is a piece made of airtight materials;

or alternatively, the process may be performed,

the damping unit is a breathable material product with the air permeability not exceeding 1%;

still alternatively, the method may comprise,

the damping unit is provided with a plurality of ventilation holes which are distributed at intervals, and the aperture of each ventilation hole is 0.05 mm-0.5 mm.

12. The vibration system of the sound generating device according to any one of claims 1 to 5, wherein the material of the folded ring is rubber or foam, and the material of the damping unit is one or more of PU, TPU, silk film, teflon or polymer crystalline material.

13. A sound emitting device, the sound emitting device comprising:

a housing;

the magnetic circuit system is arranged on the shell and forms a magnetic gap;

the vibration system of any one of claims 1 to 12, further comprising a voice coil and an elastic support piece, wherein one end of the voice coil is connected with the cone, the other end of the voice coil is suspended in the magnetic gap, the elastic support piece is located at one side of the damping unit, which is away from the bending ring, the elastic support piece surrounds the voice coil, the inner edge of the elastic support piece is connected with the voice coil, the outer edge of the elastic support piece is connected with the shell, and one side of the outer edge of the damping unit, which is away from the bending ring, is connected with the shell.

14. The sound generating device as claimed in claim 13, wherein a first step is formed on the housing, and a side of the outer edge of the damping unit facing away from the folded ring is supported and connected to the first step.

15. The sound emitting device of claim 13, wherein the resilient tab extends in a corrugated manner from its inner edge to its outer edge.

16. The sound generating device as recited in claim 13, wherein the outer edge of the elastic support piece extends outwards to form an extension part, a second step is formed on the housing, and a side of the extension part away from the damping unit is supported and connected to the second step.

17. The sound emitting device of claim 13, wherein the elastic support is made of aramid or cotton.

18. An application device comprising a housing and a sound emitting device according to any one of claims 13 to 17 housed within the housing.