CN115150696A - Shell of sound generating device, sound generating device and electronic equipment - Google Patents
Shell of sound generating device, sound generating device and electronic equipment Download PDFInfo
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- CN115150696A CN115150696A CN202210770721.5A CN202210770721A CN115150696A CN 115150696 A CN115150696 A CN 115150696A CN 202210770721 A CN202210770721 A CN 202210770721A CN 115150696 A CN115150696 A CN 115150696A
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- 239000000463 material Substances 0.000 claims abstract description 86
- 239000004964 aerogel Substances 0.000 claims abstract description 50
- 239000004642 Polyimide Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000000178 monomer Substances 0.000 claims description 10
- 229920001721 polyimide Polymers 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 6
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 239000011156 metal matrix composite Substances 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229920006305 unsaturated polyester Polymers 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 5
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 claims description 4
- 150000004676 glycans Chemical class 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 229920000098 polyolefin Polymers 0.000 claims description 4
- 229920001282 polysaccharide Polymers 0.000 claims description 4
- 239000005017 polysaccharide Substances 0.000 claims description 4
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 2
- 230000001755 vocal effect Effects 0.000 claims 6
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
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- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- -1 and wherein Substances 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000007547 defect Effects 0.000 description 1
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- 230000014509 gene expression Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000002360 preparation method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a shell of a sound generating device, the sound generating device and an electronic device, wherein a front sound cavity and a rear sound cavity are arranged in the shell of the sound generating device, the part of the shell corresponding to the rear sound cavity is formed into a rear cavity shell, at least one part of the rear cavity shell is made of organic aerogel materials to form a ventilation part, the ventilation part is provided with a hole opening channel, and the porosity of the ventilation part is 10% -70%. The shell of the sound generating device comprises a rear cavity shell, at least one part of the rear cavity shell is provided with a ventilating part, and the ventilating part is provided with an opening channel, so that stable leakage amount can be provided for the rear sound cavity, the air pressure between the front sound cavity and the rear sound cavity can be balanced, the sound generating reliability of the sound generating device in a high-temperature and high-humidity environment is improved, and the acoustic performance of the sound generating device is further improved.
Description
Technical Field
The present invention relates to the field of electroacoustic technology, and more particularly, to a housing of a sound generating device, and a sound generating device and an electronic device using the housing.
Background
When the existing high pitch loudspeaker is designed, because the volume of the high pitch loudspeaker product is small, a leakage hole cannot be designed, and the standard of the product F0 is high, the high pitch loudspeaker is designed into a closed rear cavity.
However, the sealing of the rear sound cavity of the tweeter of the prior art is difficult to ensure and difficult to detect. When the leakproofness stability of back sound chamber is not enough, discrete, the unstable phenomenon of performance can appear, and high pitch loudspeaker is after the reliability test under environment such as high temperature, high humidity, the back sound chamber atmospheric pressure change easily appears, leads to vibrating diaphragm equilibrium position to change, and then leads to the performance change, and the reliability is unqualified. Meanwhile, air pressure difference exists between the front sound cavity and the rear sound cavity, so that the linear array system deviates, the loudness is reduced, and the distortion is increased.
Disclosure of Invention
An object of the present invention is to provide a housing of a sound generating device, which can solve the problems of the prior art that there is a difference in air pressure between a front sound cavity and a rear sound cavity and the reliability of a speaker is poor.
Still another object of the present invention is to provide a sound generating device composed of the above-mentioned housing.
Still another object of the present invention is to provide an electronic device including the above sound emitting apparatus.
In order to achieve the above object, the present invention provides the following technical solutions.
According to the housing of the sound generating device in the embodiment of the first aspect of the present invention, the housing has a front sound cavity and a rear sound cavity, a portion of the housing corresponding to the rear sound cavity is formed as a rear cavity housing, at least a portion of the rear cavity housing is made of an organic aerogel material to form a ventilation portion, the ventilation portion has an open pore channel, and the porosity of the ventilation portion is 10% to 70%.
According to some embodiments of the invention, the porosity of the air-permeable portion is 20% to 50%.
According to the housing of the sound generating device in the embodiment of the second aspect of the present invention, the housing has a front sound cavity and a rear sound cavity, the portion of the housing corresponding to the rear sound cavity is a rear cavity housing, at least a portion of the rear cavity housing is made of an organic aerogel material to form a ventilation portion, and a leakage of the rear cavity housingThe amount was 0.003cm 3 /cm 2 ·s·Pa～0.1cm 3 /cm 2 ·s·Pa。
According to some embodiments of the invention, the specific strength of the air permeable portion is greater than 40 MPa-cm 3 (ii)/g; and/or the density of the air permeable part is 0.5g/cm 3 -1.2g/cm 3 。
According to some embodiments of the invention, the air permeable portion has a dissipation factor of 0.01 to 0.1.
According to some embodiments of the present invention, the organic aerogel material is prepared from at least one of polyimide-based aerogel, polyamide-based aerogel, polyester-based aerogel, aldehyde-based aerogel, polyolefin-based aerogel, and polysaccharide-based aerogel.
According to some embodiments of the invention, the rear cavity housing comprises: the side plate is arranged on the periphery of the bottom plate, and the bottom plate and the side plate are matched to form a partial internal cavity of the shell; wherein at least one of the bottom panel and the side panel includes the air permeable portion.
According to some embodiments of the invention, the side panel is entirely composed of the air permeable portion; and/or the bottom plate is entirely composed of the air permeable part.
According to some embodiments of the present invention, when the bottom plate is entirely composed of the air permeable portion or the rear chamber housing is entirely composed of the air permeable portion, a specific strength of the air permeable portion is greater than 50 MPa-cm 3 /g。
According to some embodiments of the invention, when the side panel is entirely composed of the air permeable portion, a specific strength of the air permeable portion is greater than 40 MPa-cm 3 /g。
According to some embodiments of the invention, the rear cavity housing further comprises a main body portion integrally injection molded or adhesively connected with the air permeable portion.
According to some embodiments of the invention, the body part is made of at least one of PC and modified materials thereof, PA and modified materials thereof, PPS and modified materials thereof, PP and modified materials thereof, ABS and modified materials thereof, LCP and modified materials thereof, PEI and modified materials thereof, phenol resin and modified materials thereof, epoxy resin and modified materials thereof, unsaturated polyester and modified materials thereof, stainless steel and aluminum alloys, magnesium alloys, and metal matrix composites.
According to some embodiments of the invention, the part of the shell corresponding to the front acoustic cavity is a front cavity shell, and the front cavity shell is bonded with the rear cavity shell.
According to some embodiments of the invention, the front cavity housing comprises at least one of PC and modified materials thereof, PA and modified materials thereof, PPS and modified materials thereof, PP and modified materials thereof, ABS and modified materials thereof, LCP and modified materials thereof, PEI and modified materials thereof, phenolic resins and modified materials thereof, epoxy resins and modified materials thereof, unsaturated polyesters and modified materials thereof, stainless steel, aluminum alloys, magnesium alloys, metal matrix composites.
According to some embodiments of the invention, an axis of the open-cell channel extends in a thickness direction of the rear cavity housing.
A sound generating apparatus according to an embodiment of a third aspect of the present invention includes: a housing of the sound generating device of any one of the above; the sound production monomer, the sound production monomer is located in sound generating mechanism's the shell, the sound production monomer with the shell cooperation in order to become the internal cavity of shell separates preceding sound chamber with back sound chamber.
An electronic device according to a fourth aspect of the present invention includes any of the sound emitting apparatuses described above.
The shell of the sound generating device comprises a rear cavity shell, at least one part of the rear cavity shell is composed of a ventilation part, the ventilation part is provided with an opening channel, and external air can be communicated with air inside the rear cavity shell through the opening channel, namely stable air micro-leakage can be provided for the rear sound cavity through the ventilation part, and the pressure stability of the rear sound cavity is ensured. The porosity of the ventilation part is 10% -70%, the air pressure stability of the rear sound cavity can be guaranteed on the basis of guaranteeing the rigidity and the strength of the shell, the air pressure difference between the front sound cavity and the rear sound cavity is reduced, and the linear array system is prevented from deviating, the loudness is reduced, and the distortion is prevented from rising. When the rear cavity shell is used for the sound generating device, the balance position of the vibrating diaphragm of the sound generating unit can be ensured not to be changed easily, so that the reliability of the sound generating device is ensured.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a sound emitting device according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a sound emitting device according to yet another embodiment of the present invention;
FIG. 3 is an enlarged view of area A circled in FIG. 1;
fig. 4 is a graph of the acoustic performance of the rear chamber enclosure provided in accordance with example 1 of the present invention and the rear acoustic chamber enclosure provided in comparative example 1 before reliability testing;
fig. 5 is a graph of the acoustic performance of the rear chamber enclosure provided according to example 1 of the present invention after reliability testing, compared to the rear acoustic chamber enclosure provided in comparative example 1.
Reference numerals
A sound generating device 100;
a housing 10;
a rear chamber housing 11; a base plate 111; side panels 112; a ventilation section 113; an open channel 1131; a main body portion 114;
a rear acoustic chamber 12; a front acoustic chamber 13; a front chamber housing 14; a diaphragm 15.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The housing 10 of the sound generating apparatus 100 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, the present invention provides a housing 10 of a sound generating apparatus 100, the housing 10 of the sound generating apparatus 100 has a front sound cavity 13 and a rear sound cavity 12 therein, a portion of the housing 10 corresponding to the rear sound cavity 12 is formed as a rear cavity housing 11, at least a portion of the rear cavity housing 11 is made of an organic aerogel material to form a ventilation portion 113, the ventilation portion 113 has a perforated channel 1131, and a porosity of the ventilation portion 113 is 10% to 70%.
In other words, the casing 10 of the sound generating device 100 according to the embodiment of the present invention cooperates with the sound generating unit to define the front sound cavity 13 and the rear sound cavity 12, wherein a portion of the casing 10 corresponding to the front sound cavity 13 may be used as the front cavity casing 14, and a portion of the casing 10 corresponding to the rear sound cavity 12 may be used as the rear cavity casing 11. That is, at least a portion of the housing 10 serves as the rear chamber housing 11.
And at least a portion of the rear chamber housing 11 is made of an organic aerogel material, which may form the gas permeable section 113. Since the air permeable part 113 has the open channel 1131, that is, has a through hole structure, the axis of the through hole structure may be arranged substantially along the thickness direction of the air permeable part 113, thereby facilitating the communication between the rear sound chamber 12 and the external environment.
In addition, the external air can be conducted with the air inside the rear cavity housing 11 through the open channel 1131, that is, stable micro gas leakage can be provided for the rear acoustic cavity 12 through the air permeable portion 113, and the pressure stability of the rear acoustic cavity 12 is ensured.
Optionally, the porosity of the air permeable portion 113 is 10% to 70%. Specifically, if the porosity is less than 10%, it may result in a small leakage amount of the air permeable portion 113, the rear acoustic chamber 12 may be difficult to communicate with the outside through the open channel 1131, or the pressure of the rear acoustic chamber 12 may take a long time to stabilize, and if the porosity is less than 10%, it may result in a small leakage amount, failing to achieve the effect of balancing the front and rear chamber pressures. If the porosity is higher than 70%, it is easy to cause insufficient rigidity of the air-permeable portion 113 and the casing 10 having the air-permeable portion 113, and further, if the porosity is higher than 70%, it is likely to cause an excessive leakage amount, thereby causing a noticeable difference in FR behavior of the sound emitting device 100. Therefore, in the present invention, the porosity of the air permeable portion 113 is limited to be in a range of 10% to 70%, which can ensure the air pressure stability of the rear acoustic cavity 12, reduce the air pressure difference between the front acoustic cavity 13 and the rear acoustic cavity 12, and avoid the linear array system offset, the loudness reduction and the distortion increase on the basis of ensuring the rigidity and the strength of the housing 10. The back cavity shell 11 of the invention is used for the sound generating device 100, and can ensure that the balance position of the vibrating diaphragm 15 of the sound generating unit is not easy to change, thereby ensuring the reliability of the sound generating device 100. Alternatively, the porosity of the air permeable portion 113 may be 10%, 20%, 30%, 40%, 50%, 60%, 70%, etc., which can balance the rigidity of the housing 10 and the air pressure difference between the front acoustic cavity 13 and the rear acoustic cavity 12 of the sound generating device 100, not only ensuring the structural reliability of the sound generating device 100, but also improving the acoustic performance of the sound generating device 100.
In addition, since the organic aerogel material has high temperature and high humidity resistance, the open channels 1131 of the air permeable portion 113 are not easily deformed or blocked under high temperature and high humidity environment. Therefore, the open channel 1131 of the ventilation part 113 of the present invention is advantageous for ensuring the pressure equalization inside the front and rear acoustic chambers 13 and 12 in a high-temperature and high-humidity environment. The existing sounding device 100 adopts a closed rear cavity, when the tightness of the rear cavity is unstable, the phenomena of discrete performance and instability are easy to occur, and after a reliability test in a high-temperature and high-humidity environment, the air pressure change of the rear sound cavity 12 is easy to occur, so that the balance position of the vibrating diaphragm 15 is changed, the performance is changed, and the reliability is poor. In the sound generating device 100 of the present invention, the back cavity housing 11 prepared by the air permeable portion 113 is adopted, so that after a reliability test in a high temperature and high humidity environment, the air pressure change of the back sound cavity 12 is still not easy to occur, and the stable position, stable performance and strong reliability of the vibrating diaphragm 15 of the sound generating device 100 are ensured.
Moreover, the organic aerogel material also has a light weight characteristic, so that preparing the air-permeable portion 113 by the organic aerogel material and preparing the casing 10 by the air-permeable portion 113 can reduce the mass of the casing 10 and the mass of the sound generating device 100 including the casing 10. The organic aerogel material also has higher specific modulus, so that the resonance peak of the sound production device 100 caused by high-frequency vibration can be reduced, and the overall listening feeling of the sound production device 100 is better. Furthermore, the sound generating device 100 using the housing 10 of the present invention has the characteristic of equalizing the air pressure in the front sound chamber 13 and the rear sound chamber 12, and thus the reliability of the sound generating device 100 can be improved and the distortion phenomenon can be effectively improved.
According to an embodiment of the present invention, the porosity of the air permeable portion 113 is 20% to 50%, that is, the air permeable portion 113 has the open channel 1131, where the open channel 1131 may be arranged along the thickness direction of the air permeable portion 113, and the porosity of the air permeable portion 113 is limited to 20% to 50%, for example, the porosity of the air permeable portion 113 is 20%, 30%, 40%, or 50%, which is beneficial for ensuring the balance of the internal and external pressures of the rear acoustic chamber 12, realizing the micro leakage of the rear acoustic chamber 12, and also ensuring the overall mechanical performance of the air permeable portion 113 and the housing 10 having the air permeable portion 113.
The invention also provides a shell 10 of the sound generating device 100, wherein the shell 10 is internally provided with a front sound cavity 13 and a rear sound cavity 12, the part of the shell 10 corresponding to the rear sound cavity 12 is a rear cavity shell 11, at least one part of the rear cavity shell 11 is a ventilation part 113 formed by organic aerogel materials, and the leakage amount of the rear cavity shell 11 is 0.003cm 3 /cm 2 ·s·Pa～0.1cm 3 /cm 2 s.Pa. It will be appreciated that if the amount of leakage from rear cavity housing 11 is too small, i.e., the amount of leakage from rear cavity housing 11 is less than 0.003cm 3 /cm 2 S · Pa tends to increase the pressure in the rear sound chamber 12, which causes the sound generating device 100 to deform, and affects the reliability of the sound generating device 100. If the leakage amount of the rear chamber housing 11 is too large, namely, the leakage amount of the rear chamber housing 11 is more than 0.1cm 3 /cm 2 S · Pa, which easily affects the change of sound pressure and the acoustic curve. Optionally, the amount of leakage of the rear cavity housing 11 is 0.003cm 3 /cm 2 ·s·Pa、0.005cm 3 /cm 2 ·s·Pa、0.006cm 3 /cm 2 ·s·Pa、0.08cm 3 /cm 2 ·s·Pa、0.1cm 3 /cm 2 S · Pa, etc., not only can ensure the reliability of the sound emission device 100, but also can improve the acoustic performance of the sound emission device 100.
Alternatively, the specific strength of the air-permeable part 113 of the casing 10 of the sound generating device 100 is more than 40MPa · cm 3 The specific strength is the strength of the material (force per unit area experienced at break) divided by its apparent density. Also known as strength-to-weight ratio. The specific strength of the air permeable part 113 is more than 40MPa cm 3 And/g, the mechanical properties of the housing 10 manufactured through the air-permeable part 113 can be ensured. Alternatively, the specific strength of the air-permeable portion 113 may be 45MPa · cm 3 /g、50MPa·cm 3 /g、55MPa·cm 3 /g、60MPa·cm 3 G and 65 MPa-cm 3 And/g, etc., the rigidity and strength of the housing 10 can be improved, and the mechanical property of the prepared sound generating device 100 can be further improved.
Optionally, the permeable portion 113 has a density of 0.5g/cm 3 ～1.2g/cm 3 Since the air-permeable part 113 has a high porosity, the range of the density of the air-permeable part 113 is defined as 0.5g/cm 3 ～1.2g/cm 3 The density can be reduced while providing the same strength, the mass of the casing 10 having the air-permeable portion 113 can be made smaller, and the wearing comfort of the sound generating apparatus 100 having the casing 10 can be improved. If the density of the air-permeable part 113 is less than 0.5g/cm 3 The air-permeable effect of the air-permeable portion 113 is liable to be insignificant, and if the density of the air-permeable portion 113 is more than 1.2g/cm 3 The weight of the air-permeable portion 113 is liable to increase, which in turn leads to an increase in the weight of the housing 10. Optionally, the permeable portion 113 has a density of 0.5g/cm 3 、0.8g/cm 3 、1.0g/cm 3 、1.1g/cm 3 Or 1.2g/cm 3 And the like, the prepared shell 10 can be ensured to have the advantages of light weight and high strength.
When the specific strength of the air-permeable part 113 of the casing 10 of the sound generating device 100 is larger than 40MPa cm 3 G, and the density of the air-permeable part 113 was 0.5g/cm 3 ～1.2g/cm 3 The mechanical property of the sound generating device 100 can be improved, the weight of the sound generating device 100 can be reduced, and the wearing comfort is improved.
According to an embodiment of the present invention, the loss factor of the air-permeable portion 113 is 0.01 to 0.1, and the loss factor is a ratio of the loss modulus to the storage modulus. If the loss factor of the air permeable portion 113 is less than 0.01, the air permeability of the air permeable portion 113 will be affected, and if the loss factor of the air permeable portion 113 is greater than 0.1, the damping performance of the air permeable portion 113 will be low. That is, the air permeable part 113 has a pore structure, a loss factor of the air permeable part 113 is between 0.01 and 0.1, and the air permeable part 113 has a good damping performance. When the sound generating device 100 falls, the sound generating units inside can be protected from being knocked to cause defects. Alternatively, the loss factor of the air-permeable portion 113 may be 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, etc., which can ensure that the air-permeable portion 11 has better damping performance, thereby improving the structural reliability of the sound generating device 100.
In some embodiments of the present invention, the organic aerogel material is prepared from at least one of polyimide-based aerogel, polyamide-based aerogel, polyester-based aerogel, aldehyde-based aerogel, polyolefin-based aerogel, polysaccharide-based aerogel, and the like. That is, the constituent material of the air-permeable part 113 prepared by the organic aerogel material may be one or more of polyimide aerogel, polyamide aerogel, polyester aerogel, aldehyde aerogel, polyolefin aerogel, polysaccharide aerogel, and the like.
In some embodiments of the present invention, as shown in fig. 1 and 2, the rear housing 11 includes a bottom plate 111 and a side plate 112, the side plate 112 is disposed on the periphery of the bottom plate 111, and the bottom plate 111 and the side plate 112 cooperate to form a part of the internal cavity of the housing 10. Wherein at least one of the bottom plate 111 and the side plate 112 includes an air permeable portion 113. For example, the bottom plate 111 extends along a horizontal direction, the side plate 112 is disposed around the bottom plate 111 and extends vertically, and a part of the internal cavity of the housing 10 can be defined by the cooperation of the bottom plate 111 and the side plate 112. Wherein at least one of the bottom panel 111 and the side panel 112 may include an air-permeable portion 113. That is, the ventilation part 113 may be provided only on the bottom plate 111, the ventilation part 113 may be provided only on the side plate 112, or the ventilation parts 113 may be provided on both the bottom plate 111 and the side plate 112, so that the installation position and the installation number of the ventilation parts 113 can be selected according to actual use requirements, and the operation flexibility is high.
According to an embodiment of the present invention, as shown in fig. 1, the side plate 112 is entirely composed of the air permeable portions 113, that is, the side plate 112 is entirely composed of the air permeable portions 113, for example, the side plate 112 extends in the up-down direction, the thickness direction of the side plate 112 may be a horizontal direction, and the organic aerogel material may be oriented from the inside to the outside along the thickness direction of the side plate 112, so as to balance the internal air pressure and the external air pressure. As shown in fig. 1, the bottom plate 111 may be made of other materials, and the bottom plate 111 and the side plate 112 may be connected by adhesion.
Alternatively, the bottom plate 111 is entirely composed of the air permeable portion 113, that is, the bottom plate 111 is entirely composed of the air permeable portion 113, for example, the bottom plate 111 extends along a horizontal direction, the thickness direction of the bottom plate 111 may be an up-down direction, and the organic aerogel material may be oriented along the thickness direction of the bottom plate 111 from top to bottom to achieve balance between the internal air pressure and the external air pressure.
As shown in fig. 2, when the bottom plate 111 and the side plate 112 are both formed with the air permeable portions 113, the flow direction of the gas inside the perforated channel 1131 can be as shown by the arrow direction in fig. 3. That is, the rear cavity housing 11 may be entirely composed of the air permeable portion 113, the air permeable portion 113 may constitute the entire rear cavity housing, and the air permeable portion 113 of the present embodiment may replace a conventional injection-molded housing, thereby improving the air pressure balance of the rear acoustic cavity 12. Wherein the rear chamber housing 11 may be joined to the front chamber housing 14 by bonding or the like.
According to an embodiment of the present invention, the bottom plate 111 is integrally formed with the air-permeable part 113 or the rear chamber housingWhen the whole body of the air-permeable part (11) is composed of the air-permeable part (113), the specific strength of the air-permeable part (113) is more than 50MPa cm 3 (ii) in terms of/g. That is, the entire bottom plate 111 is composed of the air-permeable portion 113, and the specific strength of the air-permeable portion 113 is more than 50MPa cm 3 (iv) g. Or when the rear chamber shell 11 is entirely composed of the air-permeable part 113, the specific strength of the rear chamber shell 11 is more than 5MPa cm 3 And/g, the composite material has better strength on the basis of ensuring light weight.
Alternatively, when the side panel 112 is entirely composed of the air-permeable portion 113, the specific strength of the air-permeable portion 113 is more than 40MPa · cm 3 (iv) g. That is, when the whole side panel 112 is composed of the air permeable part 113, the specific strength of the side panel 112 is more than 40MPa cm 3 (iv) g. That is, when the air-permeable part 113 is provided on both sides of the rear housing 11, the specific strength of the air-permeable part 113 is more than 40MPa cm 3 And/g, the stability and reliability of the side plate 112 can be ensured.
In some embodiments of the present invention, the rear cavity housing 11 further includes a main body portion 114, and the main body portion 114 and the air permeable portion 113 are integrally injection-molded or adhesively connected. By adopting the integral injection molding manner, the poor air tightness and reliability failure of the connection between the main body part 114 and the air permeable part 113 can be avoided. By using the bonding method, the connection efficiency between the main body portion 114 and the ventilation portion 113 can be improved.
According to an embodiment of the present invention, the main body portion 114 is made of at least one of PC and its modified material, PA and its modified material, PPS and its modified material, PP and its modified material, ABS and its modified material, LCP and its modified material, PEI and its modified material, phenol resin and its modified material, epoxy resin and its modified material, unsaturated polyester and its modified material, stainless steel and aluminum alloy, magnesium alloy, and metal matrix composite. For example, when the rear housing 11 includes both the air-permeable portion 113 and the main body portion 114, the air-permeable portion 113 is disposed on the side plate 112, and the bottom plate 111 may be formed by the main body portion 114, in which case, the bottom plate 111 may be made of steel plate or other materials. The bottom plate 111 and the side plate 112 can be bonded or integrally injection molded, so that poor air tightness and reliability failure caused by uneven bonding between the bottom plate 111 and the side plate 112 can be avoided.
In some embodiments of the present invention, the front cavity housing 14 is disposed at a position of the housing 10 corresponding to the front acoustic cavity 13, and the front cavity housing 14 is bonded to the rear cavity housing 11.
According to an embodiment of the present invention, the front cavity housing 14 includes at least one of PC and its modified material, PA and its modified material, PPS and its modified material, PP and its modified material, ABS and its modified material, LCP and its modified material, PEI and its modified material, phenol resin and its modified material, epoxy resin and its modified material, unsaturated polyester and its modified material, stainless steel, aluminum alloy, magnesium alloy, and metal matrix composite.
In some embodiments of the present invention, the axis of the open channel 1131 extends in the thickness direction of the rear cavity housing 11, that is, the open channel 1131 extends in the thickness direction of the rear cavity housing 11. When the rear housing 11 includes the bottom plate 111 and the side plate 112, the bottom plate 111 may extend in a horizontal direction, in which case the opening channel 1131 on the bottom plate 111 may extend in an up-down direction, and the side plate 112 may extend in an up-down direction, in which case the opening channel 1131 on the side plate 112 may extend in a horizontal direction.
The invention also discloses a sound generating device 100, wherein the sound generating device 100 comprises the shell 10 of the sound generating device 100 in any embodiment, the sound generating device 100 further comprises a sound generating monomer arranged in the shell 10, and the sound generating monomer can be matched with the sound generating monomer and the shell 10 to divide the inner cavity of the shell 10 into a front sound cavity 13 and a rear sound cavity 12, so that the sound generating function of the sound generating device 100 can be realized through the electroacoustic conversion. At least one part of the rear cavity shell 11 of the shell 10 is made of the air-permeable part 113, so that the pressure balance inside the front sound cavity 13 and the rear sound cavity 12 can be ensured and the acoustic performance of the sound generating device 100 can be improved on the basis of meeting the design requirements of lightness, thinness and miniaturization of the sound generating device 100.
The electronic device according to an embodiment of the present invention includes the sound generating apparatus 100 according to the above-mentioned embodiment, wherein the electronic device may be a mobile phone, a notebook computer, a tablet computer, a VR (virtual reality) device, an AR (augmented reality) device, a TWS (true wireless bluetooth) headset, a smart speaker, and the like, which is not limited in this respect.
Since the housing 10 of the sound generating device 100 according to the above-mentioned embodiment of the present invention has the above-mentioned technical effects, the sound generating device 100 and the electronic device according to the embodiment of the present invention also have the corresponding technical effects, that is, the housing 10 of the sound generating device 100 has better rigidity and lighter weight, and at the same time, has stronger reliability, so that the overall listening feeling of the product is better.
The housing 10 of the sound generating apparatus 100 of the present invention will be described in detail with reference to specific examples and comparative examples.
Example 1
In this embodiment, sound generating mechanism 100 is formed by shell 10 and the equipment of sound production monomer, and wherein, shell 10 includes back chamber shell 11, and back chamber shell 11 is whole to comprise portion 113 of breathing freely, and portion 113 of breathing freely comprises through organic aerogel material, and in this embodiment, organic aerogel material is the polyimide aerogel.
The specific preparation process of the rear cavity shell 11 is as follows:
the method comprises the following steps: preparing the polyimide aerogel, then injecting into the mold for integral molding to mold the polyimide aerogel shell 10, wherein the axis of the pore structure of the open pore channel 1131 in the polyimide aerogel is arranged along the thickness direction of the polyimide aerogel.
Step two: the back cavity shell 11 is integrally formed by injection molding of polyimide aerogel, and the wall thickness of the back cavity shell 11 is 0.5mm.
Comparative example 1
In comparative example 1, the sound generating apparatus 100 is assembled by a casing and a sound generating unit, wherein the casing includes a rear sound cavity housing, the rear sound cavity housing is made of a PC material, and 20% by mass of glass fiber is added to the PC material, and the rear sound cavity housing is obtained by integral injection molding. The wall thickness of the rear acoustic chamber enclosure was also 0.5mm, and the rear chamber micro leak hole was not provided on the rear acoustic chamber enclosure in comparative example 1, maintaining the airtightness of the rear acoustic chamber.
The outer case 10 prepared in example 1 and the case prepared in comparative example 1 were subjected to weight, thickness, etc. tests, and the test results are shown in table 1. And the housing 10 prepared in example 1 and the housing prepared in comparative example 1 were assembled with the sounding unit, respectively, to obtain different sounding devices. And respectively carrying out acoustic test on each sound production device.
It should be noted that, in the acoustic test, two different sound generating devices are respectively subjected to acoustic test verification, and then are stored for 48 hours under the conditions of a temperature of 65 ℃ and a humidity of 95%, and then are subjected to the acoustic performance test, and the test results are shown in table 1, fig. 4 and fig. 5.
TABLE 1 test results
As can be seen from table 1, on the basis that the rear chamber housing 11 of example 1 and the rear sound chamber housing of comparative example 1 each have a thickness of 0.5mm, the rear chamber housing 11 of example 1 weighs 21mg, whereas the rear sound chamber housing of comparative example 1 weighs 34mg, that is, the rear chamber housing 11 of example 1 weighs about 62% of the rear sound chamber housing of comparative example 1, and 38% weight reduction on the basis of the same thickness and shape is achieved, making it possible to make the sound emitting device 100 manufactured by the rear chamber housing 11 of example 1 more comfortable to wear.
Next, the specific strength of the rear chamber shell 11 of example 1 was 75MPa cm 3 In terms of the specific strength of the rear acoustic chamber housing of comparative example 1, to 74MPa cm 3 (ii) in terms of/g. That is, on the basis of the same thickness and size, and in the case where the rear housing 11 of embodiment 1 is light in weight, the specific strength of the two remains substantially the same, and it can be seen that the rear housing 11 of embodiment 1 can secure sufficient support strength.
Further, the rear chamber gas leakage amount of the rear acoustic chamber case of comparative example 1 was 0, and that of example 1 was 0.05cm 3 /cm 2 S · Pa, the air pressure of the front acoustic chamber 13 and the rear acoustic chamber 12 can be stabilized. Testing for constant moisture and high temperature as shown in conjunction with FIGS. 4 and 5Comparing the THD curves before and after the reliability test, it can be seen that the THD curve of example 1 is not different before and after the reliability test. The rear acoustic cavity housing of comparative example 1, however, has no vent hole, resulting in a large pressure in the rear acoustic cavity 12 after the reliability test, which leads to a rise in the THD curve and thus affects the overall performance.
In summary, the part of the casing 10 of the sound generating device 100 of the present invention corresponding to the rear sound cavity 12 is the rear cavity casing 11, at least a part of the rear cavity casing 11 is the air permeable portion 113, and the air permeable portion 113 has the opening channel 1131, so that the problem of air pressure difference between the front sound cavity 13 and the rear sound cavity 12 can be solved, micro leakage of the rear sound cavity 12 is realized, and linear array system offset, loudness reduction and distortion increase are avoided. In particular, when the sound generating device 100 is a tweeter product, even if the tweeter product is small, the air pressure in the front and rear chambers 13 and 12 can be balanced by the opening channel 1131 of the air permeable portion 113, and the F0 of the tweeter product is not affected.
Although some specific embodiments of the present invention have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (17)
1. The utility model provides a shell of sound generating mechanism, its characterized in that, preceding vocal cavity and back vocal cavity have in the shell, the shell with the position that back vocal cavity corresponds forms back chamber shell, at least a part of back chamber shell comprises organic aerogel material in order to form ventilative portion, ventilative portion has the trompil passageway, the porosity of ventilative portion is 10% ~ 70%.
2. The housing of a sound generating apparatus according to claim 1, wherein the porosity of said air-permeable portion is 20% to 50%.
3. The utility model provides a shell of sound generating mechanism, its characterized in that, preceding vocal cavity and back vocal cavity have in the shell, the shell with the position that back vocal cavity corresponds is the back chamber shell, at least part of back chamber shell comprises the ventilative portion with the formation by organic aerogel material, the leakage quantity of back chamber shell is 0.003cm 3 /cm 2 ·s·Pa～0.1cm 3 /cm 2 ·s·Pa。
4. The casing of the sound generating apparatus as claimed in any one of claims 1 to 3, wherein the specific strength of the air-permeable portion is greater than 40 MPa-cm 3 /g；
And/or the density of the air permeable part is 0.5g/cm 3 ～1.2g/cm 3 。
5. The casing of the sound generating apparatus according to any one of claims 1 to 3, wherein a dissipation factor of the air permeable portion is 0.01 to 0.1.
6. The casing of the sound generating apparatus according to any one of claims 1 to 3, wherein the organic aerogel material is prepared from at least one of polyimide aerogel, polyamide aerogel, polyester aerogel, aldehyde aerogel, polyolefin aerogel, and polysaccharide aerogel.
7. A casing for a sound emitting device according to any one of claims 1 to 3, wherein the back volume casing comprises:
the side plate is arranged on the periphery of the bottom plate, and the bottom plate and the side plate are matched to form a partial internal cavity of the shell;
wherein at least one of the bottom panel and the side panel includes the air permeable portion.
8. The housing of a sound generating device as defined in claim 7, wherein said side panels are entirely comprised of said air permeable portion;
and/or the bottom plate is entirely composed of the air permeable part.
9. The casing of the sound generating apparatus according to claim 7, wherein when the entire bottom plate is made up of the air permeable portion or the entire rear chamber casing is made up of the air permeable portion, a specific strength of the air permeable portion is more than 50 MPa-cm 3 /g。
10. The casing of the sound generating apparatus as claimed in claim 7, wherein when the side plate is entirely composed of the air permeable portion, the specific strength of the air permeable portion is greater than 40 MPa-cm 3 /g。
11. The casing of the sound generating apparatus as claimed in any one of claims 1 to 3, wherein the rear cavity casing further comprises a main body portion integrally injection-molded or adhesively bonded with the air permeable portion.
12. The housing of a sound generating apparatus according to claim 11, wherein said main body portion is made of at least one of PC and modified materials thereof, PA and modified materials thereof, PPS and modified materials thereof, PP and modified materials thereof, ABS and modified materials thereof, LCP and modified materials thereof, PEI and modified materials thereof, phenolic resin and modified materials thereof, epoxy resin and modified materials thereof, unsaturated polyester and modified materials thereof, stainless steel and aluminum alloy, magnesium alloy, and metal matrix composite.
13. The casing of the sound generating apparatus according to any one of claims 1 to 3, wherein a portion of the casing corresponding to the front sound cavity is a front cavity casing, and the front cavity casing is bonded to the rear cavity casing.
14. The housing of a sound generating device as defined in claim 13, wherein said front cavity housing comprises at least one of PC and its modified material, PA and its modified material, PPS and its modified material, PP and its modified material, ABS and its modified material, LCP and its modified material, PEI and its modified material, phenolic resin and its modified material, epoxy resin and its modified material, unsaturated polyester and its modified material, stainless steel, aluminum alloy, magnesium alloy, and metal matrix composite.
15. A casing for a sound emitting apparatus according to any one of claims 1 to 3, wherein an axis of the open-cell channel extends in a thickness direction of the rear chamber casing.
16. A sound generating device, comprising:
a housing of a sound emitting device according to any one of claims 1-15;
the sound production monomer, the sound production monomer is located in sound generating mechanism's the shell, the sound production monomer with the shell cooperation in order to become the internal cavity of shell separates preceding sound chamber with back sound chamber.
17. An electronic device, characterized in that it comprises a sound-emitting device according to claim 16.
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| CN202210770721.5A CN115150696A (en) | 2022-06-30 | 2022-06-30 | Shell of sound generating device, sound generating device and electronic equipment |
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| CN202210770721.5A CN115150696A (en) | 2022-06-30 | 2022-06-30 | Shell of sound generating device, sound generating device and electronic equipment |
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