CN209017233U - Sounding device and electronic equipment - Google Patents
Sounding device and electronic equipment Download PDFInfo
- Publication number
- CN209017233U CN209017233U CN201822041627.8U CN201822041627U CN209017233U CN 209017233 U CN209017233 U CN 209017233U CN 201822041627 U CN201822041627 U CN 201822041627U CN 209017233 U CN209017233 U CN 209017233U
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- China
- Prior art keywords
- front cover
- shell
- sounding device
- metal plate
- fixed part
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- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The utility model discloses a kind of sounding device and electronic equipment, wherein the sounding device includes shell, vibrational system, front cover and metal plate, and the shell has one open；The vibrational system is set in the shell；The front cover lid is located at the opening of the shell, and the front cover is metalwork, and the front cover is the ring structure of middle opening, and on the direction close to the shell, the internal perisporium of the front cover is in the ladder-like setting of multistage of ascending manner；The metal plate, it is viscous to be set to or laser welding is in the surface away from the shell of the front cover, and the middle opening setting for closing the front cover is covered, on the metal plate and the middle opening of the corresponding front cover is equipped with acoustic aperture out.Technical solutions of the utility model can reduce the production cost of sounding device.
Description
Technical field
The utility model relates to sound energy switch technology field, in particular to a kind of sounding device and electronic equipment.
Background technique
In general, the open end of shell is covered with front cover and metal plate, such as in some instances, such as in sounding device
Shown in Fig. 1,30 ' of metal plate is located on 20 ' of front cover, and 30 ' of metal plate be as inserts and 20 ' integrated injection molding of front cover,
Since 30 ' of metal plate also has preferable intensity when relatively thin, therefore vibrational system can be played preferably together with 20 ' of front cover
Protective effect.But due to 30 ' of metal plate be as inserts and with 20 ' injection molding of front cover, in each injection molding,
It requires for 30 ' of metal plate to be fitted into mold, it is complicated for operation, cause cost to greatly increase.
Utility model content
The main purpose of the utility model is to propose a kind of sounding device, it is intended to reduce production cost.
To achieve the above object, the utility model proposes sounding device, comprising:
Shell has an opening；
Vibrational system is set in the shell；
Front cover, lid are located at the opening of the shell, and the front cover is metalwork, and the front cover is the annular of middle opening
Structure, on the direction close to the shell, the internal perisporium of the front cover is in the ladder-like setting of multistage of ascending manner；And
Metal plate, it is viscous to be set to or laser welding is in the surface away from the shell of the front cover, and cover the conjunction front cover
Middle opening setting, on the metal plate and the middle opening of the corresponding front cover is equipped with acoustic aperture.
Optionally, the vibrational system includes vibrating diaphragm, and the vibrating diaphragm includes central part, around the folding of central part setting
Ring portion and the fixed part being arranged around the ring portion, the fixed part are Nian Jie with the front cover and the shell respectively.
Optionally, the front cover has a bonding plane towards the shell, and the bonding plane is Nian Jie with the fixed part,
The bonding plane is located in the fixed part in the projection on the fixed part.
Optionally, the internal perisporium of the front cover includes multiple cascaded surfaces, and multiple cascaded surfaces are along the centre of the front cover
The opening direction of opening is arranged, and the cascaded surface extends along the opening direction of the middle opening of the front cover, multiple ranks
Tread includes first cascaded surface connecting with the bonding plane, first cascaded surface on the direction close to the shell by
Gradually extend outwardly.
Optionally, the shell has a supporting surface around the open setting of the shell, and the supporting surface is towards institute
Bonding plane is stated, and Nian Jie with the fixed part, the interior lateral margin of the supporting surface and the interior lateral margin of the bonding plane are concordant.
Optionally, projected area of the middle opening of the front cover on the vibrating diaphragm is greater than the area of the central part.
Optionally, the front cover is copper fitting.
Optionally, the metal plate is steel plate.
Optionally, the front cover and the metal plate pass through glue or two-sided glue sticking.
The utility model also proposes that a kind of electronic equipment, including sounding device, the sounding device include:
Shell has an opening；
Vibrational system is set in the shell；
Front cover, lid close the open setting of the shell, and the front cover is metalwork, and the front cover is the ring of middle opening
Shape structure, on the direction close to the shell, the internal perisporium of the front cover is in the ladder-like setting of multistage of ascending manner；And
Metal plate is glued set on the surface away from the shell of the front cover, and is covered and closed the middle opening of the front cover and set
It sets, on the metal plate and the middle opening of the corresponding front cover is equipped with acoustic aperture.
Technical solutions of the utility model are by being divided into two independent components for front cover and metal plate, and by metal plate with before
Lid bonding or laser welding, only need to process respectively front cover with metal plate, then again that metal plate and front cover is fixed, compare
In metal plate and front cover integrated injection molding, the utility model is simpler and conveniently.In addition, due to not needing using note
Mould can substantially reduce the production cost of sounding device come the connection both realized.Meanwhile in the direction close to shell
On, when the internal perisporium of front cover is in the multistage ladder-like setting of ascending manner, so that the wall thickness of front cover is gradually increased, it can increase front cover
Intensity.In addition, the internal perisporium of front cover is the ring portion for gradually avoiding vibrating diaphragm outwardly and the junction of fixed part, so that vibration
Vibration of membrane space is bigger, can guarantee that vibrating diaphragm has preferable vibrating effect.Furthermore it can also make the table away from shell of front cover
The area in face is bigger, and the contact area of front cover and metal plate is more, can enhance the adhesive effect of front cover and metal plate, so that metal
Plate bonding is more stable.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of sounding device in an example；
Fig. 2 is the structural schematic diagram of one embodiment of the utility model sounding device；
Fig. 3 is the enlarged drawing in Fig. 2 at A.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 10 | Shell | 31 | Acoustic aperture out |
| 11 | Supporting surface | 40 | Vibrating diaphragm |
| 20/20 ' | Front cover | 41 | Fixed part |
| 21 | Bonding plane | 42 | Ring portion |
| 22 | First cascaded surface | 43 | Central part |
| 30/30 ' | Metal plate |
The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Under every other embodiment obtained, fall within the protection scope of the utility model.
It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding,
Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture)
Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the
Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning
The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one
A this feature.In addition, the meaning of the "and/or" occurred in full text is, including three schemes arranged side by side, by " A and/or B for ",
The scheme met simultaneously including A scheme or B scheme or A and B.In addition, the technical solution between each embodiment can be mutual
In conjunction with, but must be based on can be realized by those of ordinary skill in the art, when mutual lance occurs in the combination of technical solution
Shield or cannot achieve when, will be understood that the combination of this technical solution is not present, also not in the protection scope of the requires of the utility model
Within.
The utility model proposes a kind of sounding device, which is used for electronic equipment, wherein the electronic equipment can be with
It is capable of the equipment of sounding for mobile phone, tablet computer or earphone etc..
In the utility model embodiment, Fig. 2 and Fig. 3 are please referred to, which includes:
Shell 10 has an opening；
Vibrational system is set in shell 10；
Front cover 20, lid are located at the opening of shell 10, and front cover 20 is metalwork, and front cover 20 is the ring junction of middle opening
Structure, on the direction close to shell 10, the internal perisporium of front cover 20 is in the ladder-like setting of multistage of ascending manner；And
Metal plate 30 is glued set on the surface away from shell 10 of front cover 20, and covers the middle opening setting for closing front cover 20, gold
Belong on plate 30 and the middle opening of corresponding front cover 20 is equipped with acoustic aperture 31.In other examples, metal plate can be with laser
It is welded in the surface away from shell 10 of front cover 20.
In the present embodiment, when metal plate 30 is Nian Jie with front cover 20, acoustic aperture 31 is connected to the middle opening of front cover 20 out, vibration
The sound that system vibration generates can be blazed abroad by going out acoustic aperture 31.Wherein, 20 shape of front cover can be a variety of, such as front cover 20
For circular, Fang Huanzhuan or other types of cyclic structure etc..
In the present embodiment, on the direction close to shell 10, the internal perisporium of front cover 20, which is in that the multistage of ascending manner is ladder-like, to be set
It sets, specifically, the internal diameter of front cover 20 becomes larger on the direction close to shell 10, so that close to vibrating diaphragm 40
The oscillation space of position is bigger, to meet the demand of the oscillation space of vibrating diaphragm 40.In addition, the internal perisporium of front cover 20 can have two-stage
Ladder, three-level ladder or more stages ladder etc..
Usually in some instances, with reference to Fig. 1,30 ' of metal plate and 20 ' of front cover are by injection mold integrated injection molding
, 30 ' of metal plate is first placed in injection mold as inserts, so that the structure of mold is increasingly complex, die cost is high, and
And in injection molding, molding requires for 30 ' of metal plate to be fitted into mold every time, so that it is complicated for operation, lead to production cost
It greatly increases.And in the present solution, referring to figs. 2 and 3, front cover 20 and metal plate 30 are divided to for two independent components, and will
Metal plate 30 is Nian Jie with front cover 20, only need to process respectively front cover 20 and metal plate 30, then again by metal plate 30 and front cover 20
Bonding, compared to metal plate 30 and 20 integrated injection molding of front cover, the connection of bonding way is simpler and conveniently.Separately
Outside, due to the connection for not needing to realize the two using injection mold, therefore the production cost of sounding device can be substantially reduced.Together
When, on the direction close to shell 10, when the internal perisporium of front cover 20 is in the multistage ladder-like setting of ascending manner, so that front cover 20
Wall thickness is gradually increased, and can increase the intensity of front cover 20.In addition, the internal perisporium of front cover 20 is the ring for gradually avoiding vibrating diaphragm 40 outwardly
Portion 42 and the junction of fixed part 41, so that the oscillation space of vibrating diaphragm 40 is bigger, it is preferable to can guarantee that vibrating diaphragm 40 has
Vibrating effect.Furthermore it can also make the area on the surface away from shell 10 of front cover 20 bigger, front cover 20 connects with metal plate 30
Contacting surface product is more, can enhance the adhesive effect of front cover 20 Yu metal plate 30 so that metal plate 30 be bonded it is more stable.
In the present embodiment, vibrational system includes vibrating diaphragm 40, and vibrating diaphragm 40 includes central part 43, around the folding of the setting of central part 43
Ring portion 42 and the fixed part 41 being arranged around ring portion 42, fixed part 41 are held between front cover 20 and shell 10, and solid
It is Nian Jie with front cover 20 and shell 10 respectively to determine portion 41.Specifically, fixed part 41 is the outer peripheral portion of vibrating diaphragm 40, toward vibrating diaphragm 40
Center position is followed successively by ring portion 42 interconnected and central part 43.After the lid of front cover 20 is located at shell 10, front cover 20 and shell
It will form accommodating space between 10, and ring portion 42 and central part 43 are located in accommodating space.
In the present embodiment, front cover 20 has a bonding plane 21 towards shell 10, and bonding plane 21 is Nian Jie with fixed part 41, glues
Junction 21 is located in fixed part 41 in the projection on fixed part 41.That is, perspective plane of the bonding plane 21 on fixed part 41
Product is less than the area of fixed part 41, in this way, front cover 20 is then only contacted with fixed part 41, without with ring portion 42 and fixed part 41
Junction contact, front cover 20 will not the junction of doubling ring portion 42 and fixed part 41 cause to block, to not interfere with ring
The vibration in portion 42, so that vibrating diaphragm 40 has preferable vibrating effect.
In the present embodiment, shell 10 has a supporting surface 11 of the open setting of a surrounding housing 10, and supporting surface 11 is towards viscous
Junction 21 is arranged, and Nian Jie with fixed part 41, and the interior lateral margin of bonding plane 21 and the interior lateral margin of supporting surface 11 are concordant.It is understood that
It is that when fixed part 41 is clamped by front cover 20 and shell 10, the junction in fixed part 41 and ring portion 42 is in vacant state, so
It can be avoided front cover 20 to cause interference to the junction and influence vibration vibration of membrane.In addition, it is assumed that the interior lateral margin of bonding plane 21
When interior lateral margin relative to supporting surface 11 is arranged closer to ring portion 42, the contact area of fixed part 41 and bonding plane 21 is greater than solid
The contact area in portion 41 Yu supporting surface 11 is determined, in this way, the junction in fixed part 41 and ring portion 42 will receive front cover in vibration
20 excessive interference, to influence the vibrating effect of vibrating diaphragm 40.And when the interior lateral margin of bonding plane 21 is relative in supporting surface 11
When lateral margin is arranged further from ring portion 42, the contact area of fixed part 41 and bonding plane 21 can be made to reduce, so as to cause fixation
The fixed effect in portion 41 is bad.In the utility model embodiment, set the interior lateral margin of bonding plane 21 to and supporting surface 11
Interior lateral margin is concordant, can be to avoid the generation of the above problem, it is ensured that the vibration performance of vibrating diaphragm 40 is more preferable, moreover it is possible to avoid because of vibrating diaphragm
Deformation unevenly causes the service life of vibrating diaphragm 40 to reduce when 40 vibration.
In the present embodiment, the internal perisporium of front cover 20 includes multiple cascaded surfaces, middle opening of multiple cascaded surfaces along front cover 20
Opening direction arrangement, and cascaded surface extends along the opening direction of the middle opening of front cover 20, multiple cascaded surfaces include one with it is viscous
The first cascaded surface 22 that junction 21 connects, the first cascaded surface 22 gradually extend outwardly on the direction close to shell 10.It is specific and
Speech, since the internal perisporium of front cover 20 is in multistage ladder-like setting, therefore the internal perisporium of front cover 20 has multiple cascaded surfaces, and multiple
Cascaded surface extends towards the direction close to shell 10, wherein the first cascaded surface 22 is connect with bonding plane 21, and by the first cascaded surface
22 are gradually disposed obliquely outwards on the direction close to shell 10, i.e., the angle between the first cascaded surface 22 and bonding plane 21 is blunt
Angle.It is understood that when vibrating diaphragm 40 is Nian Jie with front cover 20, front cover 20 is placed so that bonding plane 21 upward, in bonding plane 21
After the bonding agents such as upper addition glue, then fixed part 41 is bonded with bonding plane 21.It is bonded on bonding plane 21 when by fixed part 41
When, to guarantee that fixed part 41 can be preferably bonded on bonding plane 21, it will use the bonding agents such as more glue, by fixed part 41
When being bonded on bonding plane 21, extra glue, which can overflow, flows to ring portion 42, and by the first cascaded surface 22 gradually towards outer incline
Setting, can make extra glue flow on next stage cascaded surface along the first cascaded surface 22, be avoided that extra glue stream
To ring portion 42, avoids ring portion 42 Nian Jie with front cover 20 and make the vibrating effect of vibrating diaphragm 40 poor.In addition, in bonding plane 22
When area is identical, compared to the first cascaded surface 22 in straight wall be arranged, by the first cascaded surface 22 close to shell 10 direction on by
Gradually extend outwardly setting, and the wall thickness of front cover 20 can be made thicker, can increase the intensity of front cover 20, moreover it is possible to avoid vibrating diaphragm 40
Oscillating region increases oscillation space.Certainly, in other embodiments, fixed part 41 and front cover 20 can with colloidal sol Nian Jie or nothing
Shadow glue sticking etc..
In the present embodiment, the first Nian Jie composition first assembly of front cover 20 and vibrating diaphragm 40, then first assembly again with vibrational system
Voice coil and shell 10 be adhesively fixed, subsequently metal plate 30 is bonded on front cover 20.Wherein, the centre of front cover 20
The projected area being open on vibrating diaphragm 40 is greater than the area of central part 43, convenient for the assembly with other component.Further, since directly
Fixed part 41 is bonded on front cover 20, without as shown in Figure 1, first fixed part is bonded on steel loop, then by steel loop
Nian Jie with 20 ' of front cover, the sounding device of the utility model can save this component of steel loop, therefore can greatly simplify sounding device
Overall structure, so that the overall structure of sounding device is more compact.
In the present embodiment, front cover 20 is copper fitting.Specifically, copper has preferable machinability, when front cover 20 is copper
When part, so that processing front cover 20 is easier, in addition, copper can also be recycled repeatedly without will affect its mechanical performance, it can
To greatly save resource.Certainly, in other embodiments, front cover 20 or alumiaum article, steelwork or iron piece etc..
In the present embodiment, metal plate 30 is steel plate.It is understood that metal plate 30 has the work of protection vibrational system
With, therefore require metal plate 30 that there are preferable strength and stiffness, in addition, also should ensure that the compact-sized of sounding device, therefore metal
Plate 30 should be thin as far as possible.And intensity, the rigidity of steel plate are higher, have steel plate is when relatively thin preferable intensity and just
Degree, and be unlikely to deform, it can preferably protect vibrational system.Certainly, in other embodiments, metal plate 30 or aluminium close
Golden plate, magnesium alloy plate or iron plate etc..
In the present embodiment, front cover 20 and metal plate 30 pass through glue or two-sided glue sticking.Specifically, using glue or
When front cover 20 and metal plate 30 are bonded by person's double-sided adhesive, adhesive strength is able to satisfy requirement, and use is more convenient, and cost is relatively low.
The utility model also proposes a kind of electronic equipment, which includes sounding device, the sounding device it is specific
Structure is referring to above-described embodiment, since this electronic equipment uses whole technical solutions of above-mentioned all embodiments, at least
All beneficial effects brought by technical solution with above-described embodiment, this is no longer going to repeat them.
The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model,
It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes
It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.
Claims (10)
1. a kind of sounding device characterized by comprising
Shell has an opening；
Vibrational system is set in the shell；
Front cover, lid are located at the opening of the shell, and the front cover is metalwork, and the front cover is the ring junction of middle opening
Structure, on the direction close to the shell, the internal perisporium of the front cover is in the ladder-like setting of multistage of ascending manner；And
Metal plate, it is viscous to be set to or laser welding is in the surface away from the shell of the front cover, and cover in the conjunction front cover
Between be open setting, on the metal plate and the middle opening of the corresponding front cover is equipped with acoustic aperture.
2. sounding device as described in claim 1, which is characterized in that the vibrational system includes vibrating diaphragm, and the vibrating diaphragm includes
Central part, the ring portion around central part setting and the fixed part around ring portion setting, the fixed part
It is not Nian Jie with the front cover and the shell.
3. sounding device as claimed in claim 2, which is characterized in that the front cover has a bonding towards the shell
Face, the bonding plane is Nian Jie with the fixed part, and the bonding plane is located in the fixed part in the projection on the fixed part.
4. sounding device as claimed in claim 3, which is characterized in that the internal perisporium of the front cover includes multiple cascaded surfaces, more
The opening direction of middle opening of a cascaded surface along the front cover is arranged, and the cascaded surface is opened along the centre of the front cover
The opening direction of mouth extends, and multiple cascaded surfaces include first cascaded surface connecting with the bonding plane, first rank
Tread gradually extends outwardly on the direction close to the shell.
5. sounding device as claimed in claim 3, which is characterized in that there is the shell opening for surrounding the shell to set
The supporting surface set, the supporting surface is towards the bonding plane, and, the interior lateral margin of the supporting surface and institute Nian Jie with the fixed part
The interior lateral margin for stating bonding plane is concordant.
6. sounding device as claimed in claim 2, which is characterized in that throwing of the middle opening of the front cover on the vibrating diaphragm
Shadow area is greater than the area of the central part.
7. the sounding device as described in any one of claim 1 to 6, which is characterized in that the front cover is copper fitting.
8. the sounding device as described in any one of claim 1 to 6, which is characterized in that the metal plate is steel plate.
9. the sounding device as described in any one of claim 1 to 6, which is characterized in that the front cover and the metal plate
Pass through glue or two-sided glue sticking.
10. a kind of electronic equipment, which is characterized in that including sounding device as in one of claimed in any of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822041627.8U CN209017233U (en) | 2018-12-06 | 2018-12-06 | Sounding device and electronic equipment |
| PCT/CN2018/125605 WO2020113742A1 (en) | 2018-12-06 | 2018-12-29 | Sound producing device and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822041627.8U CN209017233U (en) | 2018-12-06 | 2018-12-06 | Sounding device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209017233U true CN209017233U (en) | 2019-06-21 |
Family
ID=66843582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822041627.8U Active CN209017233U (en) | 2018-12-06 | 2018-12-06 | Sounding device and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN209017233U (en) |
| WO (1) | WO2020113742A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114173251A (en) * | 2020-09-10 | 2022-03-11 | 深圳瑞利声学技术股份有限公司 | Bugle and audio amplifier |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090029480A (en) * | 2007-09-18 | 2009-03-23 | 부전전자 주식회사 | Actuator device |
| CN203984667U (en) * | 2014-06-25 | 2014-12-03 | 歌尔声学股份有限公司 | Microspeaker |
| CN205092959U (en) * | 2015-11-04 | 2016-03-16 | 歌尔声学股份有限公司 | Loudspeaker module |
| CN206164842U (en) * | 2016-11-23 | 2017-05-10 | 歌尔科技有限公司 | Loudspeaker |
| CN106792382B (en) * | 2016-12-27 | 2022-09-16 | 厦门东声电子有限公司 | Telephone receiver or loudspeaker for improving electroacoustic performance |
-
2018
- 2018-12-06 CN CN201822041627.8U patent/CN209017233U/en active Active
- 2018-12-29 WO PCT/CN2018/125605 patent/WO2020113742A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114173251A (en) * | 2020-09-10 | 2022-03-11 | 深圳瑞利声学技术股份有限公司 | Bugle and audio amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020113742A1 (en) | 2020-06-11 |
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