CN110234054B - Exciter and electronic equipment - Google Patents
Exciter and electronic equipment Download PDFInfo
- Publication number
- CN110234054B CN110234054B CN201910399465.1A CN201910399465A CN110234054B CN 110234054 B CN110234054 B CN 110234054B CN 201910399465 A CN201910399465 A CN 201910399465A CN 110234054 B CN110234054 B CN 110234054B
- Authority
- CN
- China
- Prior art keywords
- stator assembly
- shell
- exciter
- elastic
- elastic sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000013016 damping Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
-
- 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
- H04R9/10—Telephone receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2400/00—Loudspeakers
- H04R2400/03—Transducers capable of generating both sound as well as tactile vibration, e.g. as used in cellular phones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
The invention discloses an exciter and electronic equipment, wherein the exciter comprises a shell, a stator component fixed in the shell, and a vibrator component which is positioned in the shell and matched with the stator component; the stator assembly further comprises a damping component connected with the stator assembly, and the damping component is configured to adjust the elastic coefficient of the stator assembly so as to improve the frequency response of the exciter in a high-frequency region.
Description
Technical Field
The present invention relates to the field of electroacoustic conversion devices, and more particularly, to an exciter and an electronic apparatus.
Background
Sound generators are important electroacoustic transducer elements in electronic products for converting current signals into sound. Along with the rapid development of electronic products in recent years, sound generating devices applied to the electronic products have been improved correspondingly.
The traditional sound production device for the mobile phone Receiver is a Receiver (Receiver), in the current mobile phone industry, along with the pursuit of people on the maximum screen occupation ratio, a comprehensive screen gradually becomes the main development direction of the mobile phone, and a technical problem therewith is how to realize the Receiver function under the design that a screen has no opening, and meanwhile, the traditional sound production device for the mobile phone Receiver has better listening experience. Therefore, to solve the problem that the Receiver (Receiver) is opened on the screen of the mobile phone, the exciter is gradually replacing the Receiver as the sounding component of the mobile phone. However, the exciter in the prior art generally has a problem of low frequency response in an effective high frequency region, and therefore, how to optimize the sounding effect of the exciter in the high frequency region and provide a better sound experience for a user becomes a great concerned technical problem.
In view of the above, a new technical solution is needed to solve the above problems.
Disclosure of Invention
An object of the present invention is to provide a new solution for an actuator and an electronic device.
According to a first aspect of the present invention, there is provided an actuator comprising:
the vibration generator comprises a shell, a stator assembly fixed in the shell and a vibrator assembly positioned in the shell and matched with the stator assembly; the stator assembly further comprises a damping component connected with the stator assembly, and the damping component is configured to adjust the elastic coefficient of the stator assembly so as to improve the frequency response of the exciter in a high-frequency region.
Optionally, the buffer component is an elastic element sandwiched between the housing and the stator assembly, and the elastic element is configured to form elasticity between the housing and the stator assembly to adjust an elastic coefficient of the stator assembly.
Optionally, the elastic element is a first elastic sheet, two ends of the first elastic sheet are bent towards the same side, two ends of the first elastic sheet are fixedly connected to the inner surface of the housing, and the stator assembly is fixedly connected to the first elastic sheet.
Optionally, the width of the two ends of the first elastic sheet is smaller than the width of the middle of the first elastic sheet.
Optionally, the elastic element is a second elastic sheet, two ends of the second elastic sheet are bent towards the same side, two ends of the second elastic sheet are fixedly connected to the inner surface of the housing, and the stator assembly is fixedly connected to the second elastic sheet; and the ends of the two ends of the second elastic sheet are oppositely provided with notches.
Optionally, the buffer component is a hollow-out portion opened on the housing, the stator assembly is installed at the hollow-out portion of the housing, and the hollow-out portion is configured to reduce a contact area between the housing and the stator assembly to adjust an elastic coefficient of the stator assembly.
Optionally, the hollowed-out portion is L-shaped.
Optionally, four hollowed-out portions are symmetrically arranged on the shell.
Optionally, the vibrator assembly comprises a magnet, a washer and an elastic assembly; the magnet and the washer are connected in the shell through the elastic component.
According to another aspect of the present invention, there is provided an electronic device comprising an actuator as described above.
According to the exciter, the buffer component is arranged between the shell and the stator component, and the elastic coefficient of the stator component is adjusted through the buffer component, so that the frequency response of the exciter in a high-frequency area is improved, the sound production effect of the exciter in the high-frequency area is optimized, and better sound experience is provided for a user.
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 diagram of a first embodiment of an exciter according to the present invention;
FIG. 2 is a schematic structural diagram of a first resilient piece of an actuator according to the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of an actuator according to the present invention;
FIG. 4 is a schematic structural diagram of a second resilient piece of an actuator according to the present invention;
fig. 5 is a schematic structural diagram of a third embodiment of an actuator according to the present invention.
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.
Experiments show that in a high-frequency range, the vibrator vibration displacement of the exciter is small, so that the vibration of the stator assembly cannot be ignored. In view of the above, as shown in fig. 1, 3 and 5, an embodiment of the present invention provides an exciter, which includes a housing and a stator assembly fixed in the housing, specifically, the housing may include a first housing 1 and a second housing 2 that are connected together in a fitting manner, and a space for accommodating the oscillator assembly and the stator assembly is formed between the first housing 1 and the second housing 2. The exciter also comprises a vibrator component which is positioned in the shell and matched with the stator component, wherein the vibrator component is used for vibrating as a vibration source, and the vibration source drives a screen or a shell of the electronic equipment to vibrate and sound when vibrating. The exciter further comprises a buffer component connected with the stator component, in one embodiment, the stator component can be a coil 3, and the buffer component is configured to adjust the elastic coefficient of the stator component to improve the frequency response of the exciter in a high-frequency region.
In an embodiment, the buffer component is an elastic element sandwiched between the second housing 2 and the coil 3, in the prior art, the second housing 2 and the coil 3 are directly stacked together, so that the elastic coefficient of the stator assembly is relatively large, and an elastic element sandwiched between the second housing 2 and the coil 3 can form elastic isolation between the second housing 2 and the coil 3, that is, the elastic element can not only isolate the second housing 2 from the coil 3, but more importantly, can make the second housing 2 and the coil 3 have elasticity, so that the elastic coefficient of the stator assembly can be adjusted to further improve the frequency response of the exciter in a high frequency region.
As shown in fig. 2, in an embodiment, the elastic element is a first elastic sheet 4, two ends of the first elastic sheet 4 are bent toward the same side, in this embodiment, two ends of the first elastic sheet 4 are symmetrically bent toward the same side, two bent ends of the first elastic sheet 4 are fixedly connected (e.g., welded) to an inner surface of the second housing 2, and the coil 3 is fixedly connected (e.g., adhered) to a surface of the first elastic sheet 4 away from the second housing 2; the width of the two ends of the first elastic sheet 4 is smaller than the width of the middle part of the first elastic sheet, the thickness of the two ends of the first elastic sheet 4 can be thinned, a step-type structure is formed at each of the two ends of the first elastic sheet, and through holes can be formed in the two ends of the first elastic sheet 4 to reduce the overall mass of the first elastic sheet 4, so that the first elastic sheet is smaller and lighter.
As shown in fig. 4, in an embodiment, the elastic element is a second elastic sheet 5, two ends of the second elastic sheet 5 are bent toward the same side, in this embodiment, two ends of the second elastic sheet 5 are symmetrically bent toward the same side, two ends of the second elastic sheet 5 are fixedly connected (e.g., welded) to an inner surface of the second housing 2, and the coil 3 is fixedly connected (e.g., adhered) to a surface of the second elastic sheet 5 away from the second housing 2; the end of the two ends of the second elastic sheet 5 are provided with notches relatively to form a structure similar to a fork shape, so that the two ends of the second elastic sheet 5 and the inner surface of the second shell 2 have four joints, and the structure can reduce the mass of the second elastic sheet 5 while ensuring the connection tightness of the second elastic sheet 5 and the second shell 2.
As shown in fig. 5, in one embodiment, the buffer component is a hollow-out portion 6 opened on the second housing 2, the stator assembly (e.g., the coil 3) is installed at the position of the hollow-out portion 6 of the second housing 2, and the hollow-out portion 6 is configured to reduce a contact area between the second housing 2 and the coil 3 to adjust an elastic coefficient of the stator assembly. In this embodiment, the hollowed-out portion 6 is formed in the second housing 2, so that the portion of the coil 3 fixedly connected to the second housing 2 can be reduced, and therefore the rigidity of the portion of the coil 3 fixed to the second housing 2 can be adjusted, and the elastic coefficient of the stator assembly can be adjusted, so that the resonant frequency f0 of the stator assembly is shifted, and the frequency response of the exciter in the effective high-frequency region is improved.
In one embodiment, the hollow-out portions 6 are L-shaped, and four L-shaped hollow-out portions 6 are symmetrically disposed on the second housing 2. In other embodiments, the hollow portions 6 may also be in other shapes, for example, circular, and the number of the hollow portions 6 is not limited to four, and the hollow portions 6 may be flexibly arranged according to actual needs, as long as the hollow portions 6 formed on the second housing 2 can reduce the area of the fixed connection between the coil 3 and the second housing 2.
Referring to fig. 1, 3 and 5, in an embodiment, the vibrator component includes a magnet 7, a washer 8 and an elastic component, the magnet 7 and the washer 8 are connected in the housing through the elastic component, and the elastic component is a spring 9 or a third elastic sheet; the coil 3 is wound by a wire in one direction to form a closed annular structure, a through hole is formed in the middle of the coil 3, a wiring area of the coil 3 is formed around the through hole, the wiring area refers to an area through which a lead in the coil 3 actually passes, and the whole wiring area is annular. Magnet 7 and coil 3 cooperation are in order forming magnetic field, and washer 8 sets up on magnet 7 to improve the magnetic induction intensity in magnetic field, and spring 9 or third shell fragment set up on washer 8, and spring 9 or third shell fragment can set up more than one as required.
The exciter of the invention can effectively adjust the resonant frequency f0(f0 √ (k/m)/2 pi) of the stator assembly in a high-frequency region by adjusting the elastic coefficient k of the stator assembly, thereby changing the position of the stator assembly in a high-frequency resonance peak and improving the frequency response of the exciter in an effective high-frequency region.
The embodiment of the invention also provides electronic equipment, which comprises the exciter. The electronic device may be a mobile phone or a tablet computer, and the invention is not limited thereto.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present 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 (8)
1. An actuator, comprising:
the exciter comprises a shell, a stator assembly fixed in the shell, a vibrator assembly positioned in the shell and matched with the stator assembly, and a buffer component connected with the stator assembly, wherein the buffer component is configured to be used for adjusting the elastic coefficient of the stator assembly so as to improve the frequency response of the exciter in a high-frequency region;
the buffer component is an elastic element clamped between the shell and the stator assembly, and the elastic element is configured to form elasticity between the shell and the stator assembly so as to adjust the elastic coefficient of the stator assembly; or,
the buffer component is a hollow-out part arranged on the shell, the stator assembly is arranged at the position of the hollow-out part of the shell, and the hollow-out part is configured to be used for reducing the contact area between the shell and the stator assembly so as to adjust the elastic coefficient of the stator assembly.
2. The exciter according to claim 1, wherein the elastic element is a first elastic sheet, two ends of the first elastic sheet are bent towards the same side, two ends of the first elastic sheet are fixedly connected to the inner surface of the housing, and the stator assembly is fixedly connected to the first elastic sheet.
3. An actuator according to claim 2, wherein the width of the ends of the first spring is less than the width of the middle of the first spring.
4. The exciter according to claim 1, wherein the elastic element is a second elastic sheet, two ends of the second elastic sheet are bent towards the same side, two ends of the second elastic sheet are fixedly connected to the inner surface of the shell, and the stator assembly is fixedly connected to the second elastic sheet; and the ends of the two ends of the second elastic sheet are oppositely provided with notches.
5. The exciter of claim 1, wherein the hollowed-out portion is L-shaped.
6. The exciter of claim 5, wherein four of the hollowed-out portions are symmetrically disposed on the housing.
7. An actuator according to any of claims 1 to 6, wherein the vibrator assembly comprises a magnet, washer and spring assembly; the magnet and the washer are connected in the shell through the elastic component.
8. An electronic device, characterized in that the electronic device comprises an actuator according to any of claims 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910399465.1A CN110234054B (en) | 2019-05-14 | 2019-05-14 | Exciter and electronic equipment |
| PCT/CN2019/129779 WO2020228344A1 (en) | 2019-05-14 | 2019-12-30 | Exciter and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910399465.1A CN110234054B (en) | 2019-05-14 | 2019-05-14 | Exciter and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110234054A CN110234054A (en) | 2019-09-13 |
| CN110234054B true CN110234054B (en) | 2020-09-22 |
Family
ID=67860633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910399465.1A Active CN110234054B (en) | 2019-05-14 | 2019-05-14 | Exciter and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110234054B (en) |
| WO (1) | WO2020228344A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110234054B (en) * | 2019-05-14 | 2020-09-22 | 歌尔股份有限公司 | Exciter and electronic equipment |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308418A (en) * | 1999-12-17 | 2001-08-15 | 三星电机株式会社 | Vibrating loudspeaker |
| KR100793682B1 (en) * | 2007-01-16 | 2008-01-10 | 김정훈 | Subminiature linear vibrator |
| CN201656732U (en) * | 2010-02-01 | 2010-11-24 | 瑞声光电科技(常州)有限公司 | Vibration motor |
| CN101931846A (en) * | 2009-06-24 | 2010-12-29 | 宝星电子股份有限公司 | Multifunction micro speaker |
| CN102088235A (en) * | 2009-12-03 | 2011-06-08 | 三星电机株式会社 | Linear vibrator |
| CN102377313A (en) * | 2010-08-09 | 2012-03-14 | 三星电机株式会社 | Linear vibrator |
| CN102545530A (en) * | 2010-12-30 | 2012-07-04 | 三星电机株式会社 | Linear vibration motor |
| CN102916554A (en) * | 2011-08-03 | 2013-02-06 | 三星电机株式会社 | Linear vibration device |
| CN103138523A (en) * | 2011-12-05 | 2013-06-05 | 三星电机株式会社 | Linear vibration motor |
| CN105553217A (en) * | 2016-02-27 | 2016-05-04 | 歌尔声学股份有限公司 | Vibrating motor |
| CN205847579U (en) * | 2016-07-21 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Sound-producing device |
| CN205992848U (en) * | 2016-08-16 | 2017-03-01 | 池州市弘港科技电子有限公司 | Brushless micro vibrator |
| CN107370323A (en) * | 2017-04-14 | 2017-11-21 | 瑞声科技(新加坡)有限公司 | Resonator device and electronic equipment |
| CN109068244A (en) * | 2018-07-17 | 2018-12-21 | 歌尔股份有限公司 | Electromagnetic driver and screen sounding device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4592088B2 (en) * | 2005-05-30 | 2010-12-01 | シチズン電子株式会社 | Vibrator |
| CN200973173Y (en) * | 2006-11-16 | 2007-11-07 | 常州美欧电子有限公司 | Vabration acoustical generator |
| CN101945317A (en) * | 2009-07-07 | 2011-01-12 | 陈奚平 | Loudspeaker |
| CN206100437U (en) * | 2016-09-06 | 2017-04-12 | 歌尔股份有限公司 | Bone conduction speaker monomer and bone conduction headset |
| CN207530690U (en) * | 2017-12-12 | 2018-06-22 | 歌尔科技有限公司 | Linear vibration motor |
| CN108039809B (en) * | 2017-12-19 | 2019-10-25 | 歌尔股份有限公司 | Stop support for vibrating motor and the linear vibration motor including the bracket |
| CN109040917B (en) * | 2018-07-02 | 2021-10-08 | 歌尔股份有限公司 | Exciter and screen sounding device |
| CN110234054B (en) * | 2019-05-14 | 2020-09-22 | 歌尔股份有限公司 | Exciter and electronic equipment |
-
2019
- 2019-05-14 CN CN201910399465.1A patent/CN110234054B/en active Active
- 2019-12-30 WO PCT/CN2019/129779 patent/WO2020228344A1/en active Application Filing
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308418A (en) * | 1999-12-17 | 2001-08-15 | 三星电机株式会社 | Vibrating loudspeaker |
| KR100793682B1 (en) * | 2007-01-16 | 2008-01-10 | 김정훈 | Subminiature linear vibrator |
| CN101931846A (en) * | 2009-06-24 | 2010-12-29 | 宝星电子股份有限公司 | Multifunction micro speaker |
| CN102088235A (en) * | 2009-12-03 | 2011-06-08 | 三星电机株式会社 | Linear vibrator |
| CN201656732U (en) * | 2010-02-01 | 2010-11-24 | 瑞声光电科技(常州)有限公司 | Vibration motor |
| CN102377313A (en) * | 2010-08-09 | 2012-03-14 | 三星电机株式会社 | Linear vibrator |
| CN102545530A (en) * | 2010-12-30 | 2012-07-04 | 三星电机株式会社 | Linear vibration motor |
| CN102916554A (en) * | 2011-08-03 | 2013-02-06 | 三星电机株式会社 | Linear vibration device |
| CN103138523A (en) * | 2011-12-05 | 2013-06-05 | 三星电机株式会社 | Linear vibration motor |
| CN105553217A (en) * | 2016-02-27 | 2016-05-04 | 歌尔声学股份有限公司 | Vibrating motor |
| CN205847579U (en) * | 2016-07-21 | 2016-12-28 | 瑞声科技(新加坡)有限公司 | Sound-producing device |
| CN205992848U (en) * | 2016-08-16 | 2017-03-01 | 池州市弘港科技电子有限公司 | Brushless micro vibrator |
| CN107370323A (en) * | 2017-04-14 | 2017-11-21 | 瑞声科技(新加坡)有限公司 | Resonator device and electronic equipment |
| CN109068244A (en) * | 2018-07-17 | 2018-12-21 | 歌尔股份有限公司 | Electromagnetic driver and screen sounding device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020228344A1 (en) | 2020-11-19 |
| CN110234054A (en) | 2019-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9503805B2 (en) | Piezoelectric ceramic dual-frequency earphone structure | |
| CN110177322B (en) | Screen sound production exciter and electronic equipment | |
| US10932050B2 (en) | Micro-speaker | |
| KR101057078B1 (en) | Multifunction micro speaker | |
| KR102167474B1 (en) | Hybrid actuator | |
| CN104349251B (en) | Loadspeaker structure | |
| CN111698617A (en) | Sound production device and electronic equipment | |
| CN107682792B (en) | Sound production device | |
| US12081957B2 (en) | Sound-producing device and electronic terminal | |
| CN111698618A (en) | Sound production device and electronic equipment | |
| US11515068B2 (en) | Exciter | |
| US20190028010A1 (en) | Vibration motor and portable device | |
| JP5032707B2 (en) | Multi-function micro speaker | |
| CN110234054B (en) | Exciter and electronic equipment | |
| US20110155501A1 (en) | Diaphragm for electroacoustic transducer | |
| CN106028234B (en) | Vibrating diaphragm and loudspeaker monomer | |
| CN112312284A (en) | Bone conduction speaker composite washer magnetic circuit assembly | |
| CN109587609B (en) | Sound producing device | |
| KR101111100B1 (en) | A hi-end sound speaker unit for an earphone | |
| US11956613B2 (en) | Sound-producing device and electronic terminal | |
| CN107682793B (en) | Sound production device | |
| CN209283490U (en) | Sounding device | |
| KR102183882B1 (en) | Hybrid actuator | |
| KR19990041872A (en) | Speaker structure with double voice coil | |
| KR20030015814A (en) | Multi-function actuator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |