KR101116307B1 - Slim speaker - Google Patents
Slim speaker Download PDFInfo
- Publication number
- KR101116307B1 KR101116307B1 KR1020100026900A KR20100026900A KR101116307B1 KR 101116307 B1 KR101116307 B1 KR 101116307B1 KR 1020100026900 A KR1020100026900 A KR 1020100026900A KR 20100026900 A KR20100026900 A KR 20100026900A KR 101116307 B1 KR101116307 B1 KR 101116307B1
- Authority
- KR
- South Korea
- Prior art keywords
- diaphragm
- support member
- fixed
- intermediate support
- longitudinal direction
- Prior art date
Links
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- 230000011514 reflex Effects 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000003466 welding Methods 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
- H04R9/02—Details
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/046—Construction
-
- 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
- H04R9/04—Construction, mounting, or centering of coil
- H04R9/045—Mounting
-
- 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
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/2815—Enclosures comprising vibrating or resonating arrangements of the bass reflex type
- H04R1/2819—Enclosures comprising vibrating or resonating arrangements of the bass reflex type for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
- H04R2499/10—General applications
- H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
Abstract
The present invention relates to a slim speaker, the width of the diaphragm portion of the narrow shape in the longitudinal direction; A first body portion to which an outer circumferential portion of the diaphragm portion is fixed; An intermediate support member fixed to the diaphragm; A voice coil fixed to the intermediate support member; A magnetic circuit portion comprising a yoke having a bottom portion and a side wall portion, a permanent magnet fixed to a bottom portion of the yoke, and a plate fixed to an upper surface of the permanent magnet; and the magnetic circuit portion is fixed, And a second body portion coupled to a lower portion of the first body portion.
Description
The present invention relates to a slim speaker, and more particularly to a slim speaker having an improved configuration of the voice coil and the diaphragm fixing method in order to maximize the efficiency of the driving force of the magnetic circuit.
In general, a speaker is a device that converts an electrical signal into an acoustic signal using the vibration of the diaphragm. Speakers are used in video equipment, including general audio equipment. Although it is often desirable for the characteristics of the sound that the shape of the speaker is generally circular, it is used in various shapes and sizes as needed.
The present invention relates to a so-called slim speaker, which is formed particularly long in one direction in relation to the width among the speakers. In the case of a slim speaker, when the surface from which sound comes out is called a front surface, the shape of the front surface is narrow and it is long in a longitudinal direction. Slim speakers are generally referred to in various ways as long oval, track or oval track speakers.
Such slim speakers are used in various kinds of electronic products provided with mounting spaces on both sides of the screen, such as electronic products having narrow and long mounting spaces, for example, TVs.
The slim speaker includes a diaphragm that is a component that vibrates and generates sound among the components mounted therein, and the shape of the diaphragm is also narrow and long. By the way, since the diaphragm is narrow and long form, there exists a problem that control of diaphragm movement is not easy compared with a general circular diaphragm.
In the case of a slim speaker, a diaphragm is attached with a voice coil which is located in the magnetic gap of the magnetic circuit and receives a force. As the magnetic circuit changes, the voice coil moves upward, and the diaphragm vibrates and generates sound according to the movement of the voice coil.
However, since the diaphragm of the slim speaker is narrow and long in shape, the diaphragm is twisted in the long axis direction during the oscillating operation, and thus, it is difficult to obtain desired acoustic characteristics.
In order to overcome this difficulty, in the case of a conventional slim speaker, a configuration in which two circular voice coils are used on the rear surface of the diaphragm or a configuration having a reinforcing rib in a short axis direction in a long oval coil has been attempted. The above problem is a setting that is still not overcome.
That is, in the case of the conventional slim speaker, the change of the acoustic characteristics due to the generation of reverse resonance of the voice coil and the outer peripheral part and the inner part of the diaphragm fixing part, the non-uniformity of the reproduction frequency characteristic, and the efficiency due to the dispersion of the driving force of the magnetic circuit There is a problem that degradation and reproduction of the bass are impossible.
The present invention has been invented to solve the above-described problems, and by adopting a configuration in which the diaphragm portion is fixed to the voice coil by the intermediate support member, the diaphragm portion is not twisted in the long axis direction during vibration to obtain desired acoustic characteristics. The object is to provide a slim speaker that can be.
The slim speaker of the present invention comprises a diaphragm portion having a narrow width and a long shape in the longitudinal direction; A first body portion to which an outer circumferential portion of the diaphragm portion is fixed; An intermediate support member fixed to the diaphragm; A voice coil fixed to the intermediate support member; A magnetic circuit portion comprising a yoke having a bottom portion and a side wall portion, a permanent magnet fixed to a bottom portion of the yoke, and a plate fixed to an upper surface of the permanent magnet; and the magnetic circuit portion is fixed, And a second body portion coupled to a lower portion of the first body portion.
On the other hand, the intermediate support member, the width is narrow and long form in the longitudinal direction, the intermediate support member is preferably a central portion formed long along the longitudinal direction is coupled to the diaphragm portion.
In addition, the diaphragm portion has a coupling portion formed in the center portion in the longitudinal direction, and the intermediate support member is formed in the center portion in the length direction in the longitudinal direction, provided with a protrusion formed protruding upwards, Preferably, the protrusion of the intermediate support member is coupled to the engaging portion of the diaphragm portion.
And, the coupling portion of the diaphragm portion, it is preferable that the long hole is formed to penetrate long so that the projection is inserted and fixed.
On the other hand, the engaging portion of the diaphragm portion, it is also preferable that the fitting groove is a narrow and long groove shape that can be fixed to the projection portion.
On the other hand, the intermediate support member, the support portion to which the voice coil is fixed to the lower side and the support portion is formed extending in the width direction, a plurality of reinforcement ribs are formed spaced apart from each other along the longitudinal direction of the intermediate support member And, the protrusions, it is formed in the longitudinal direction on the upper portion of the support, it is preferable to include an extension protrusion formed longer in both sides than the length of the support.
The vibrating plate part may include a vibrating edge part fixed to the outer circumferential part of the first body part, and a vibrating body part coupled to a central part of the vibrating edge part, and the vibrating plate part is coupled to the intermediate supporting member. It is preferable that the central portion of the vibrating body portion is formed below the outer peripheral portion of the vibrating edge portion.
On the other hand, the slim speaker, it is preferable that the intermediate support member is penetrated and fixed to the center portion, the outer peripheral portion preferably further comprises a spring damper of an elastic material fixed to the first body portion.
In addition, the spring damper is preferably fixed to the intermediate supporting member by an insert injection method, and is integrated with the intermediate supporting member.
On the other hand, the spring damper is a conductive metal, it is preferable that both ends of the coil constituting the voice coil is electrically connected to the spring damper.
On the other hand, it is coupled to the lower portion of the first body portion, further comprising a cover portion coupled to seal the inner space including the second body portion, the second body portion is provided with at least one rear sound emitting hole, The first body portion is preferably provided with at least one bass reflex hole in communication with the rear sound emitting hole and opened forward.
And, the rear sound emitting holes, one in each of the one end and the other end in the longitudinal direction of the second body portion is provided in each one, the bass reflex hole, adjacent to each of the rear sound emission holes of the first body portion Therefore, it is preferable that two are provided, one each at one end portion and the other end portion in the longitudinal direction.
According to the slim speaker of the present invention, by fixing the voice coil to the intermediate support member and fixing the intermediate support member to the diaphragm, it is possible to obtain the effect that a long elliptic voice coil can be used.
In addition, when adopting a configuration in which the central portion of the diaphragm portion is coupled to the intermediate support member for a long time, it is possible to obtain the effect that the long oval-shaped voice coil can prevent characteristic changes due to abnormal vibration and deformation during driving.
In addition, when the voice coil adopts a configuration in which the contact area between the fixed intermediate support member and the diaphragm is minimized, it is possible to minimize the loss of driving force generated in the magnetic circuit portion.
1 is a schematic perspective view of a slim speaker of one embodiment according to the present invention;
2 and 3 are schematic cross-sectional views taken along lines II-II and III-III of FIG. 1, respectively;
4 to 7 are perspective views schematically showing the diaphragm portion, the intermediate support member, the spring damper, and the voice coil of the slim speaker of this embodiment, respectively;
8 is a schematic cross-sectional view of a vibration plate, an intermediate support member, a spring damper, and a voice coil coupled to each other;
9 is a perspective view showing a state in which the intermediate support member and the spring damper are coupled to the first body portion;
10 to 12 are perspective views of a state in which a plate is coupled to a permanent magnet, a magnetic circuit unit in which a permanent magnet and a plate are coupled to a yoke, and a magnetic circuit unit is coupled to a second body portion, respectively.
13 is a perspective view of a magnetic circuit unit coupled to the cover unit;
14 is a schematic cross-sectional view for explaining that the projection of the intermediate support member is coupled to the fitting groove which is a modified form of the long hole in the diaphragm portion in FIG.
With reference to Figures 1 to 14 attached to a slim speaker of an embodiment according to the present invention will be described in detail.
1 is a schematic perspective view of a slim speaker of one embodiment according to the present invention, and FIGS. 2 and 3 are schematic cross-sectional views taken along lines II-II and III-III of the slim speaker of FIG. 1, respectively.
The
The
The
In the case of this embodiment, the
Referring to FIG. 4, the
The portion formed along the outer portion of the
In the present embodiment, the vibrating
In addition, in the present embodiment, the
The
Since the
The outer
On the other hand, in the present embodiment, the
Two base reflex holes 22 are provided, one each at one end portion and the other end portion in the longitudinal direction. Both end portions of the
The
That is, the
Conventionally, since two circular voice coils are attached to the long oval diaphragm or directly fixed to the upper end of the long oval voice coil, the diaphragm is distorted during operation or the sound output is reduced due to the loss of driving force. There was this.
The
In the present embodiment, the
On the other hand, in the present embodiment, the engaging
On the other hand, in another embodiment, the
The inlet width of the
Referring to FIG. 5, the
The said
The reinforcing
The
The
The
The lower part of the
The
The
The
On the other hand, the magnetic gap is a space formed between the
In the
12 and 2, the
In the
The
Meanwhile, in another embodiment, the spring damper may be made of a nonconductive polymer elastic material. In this case, a separate arrangement for electrical connection of the voice coil should be provided.
In the present embodiment, the
8, the
The
The operation and effects of the slim speaker of the above-described configuration will be described.
According to the slim speaker of the present invention, by employing the
In addition, by having a configuration in which the central portion of the
In addition, by forming the shape of the
In addition, by providing the rear
In addition, the
In addition, the coupling part of the diaphragm is provided with a
In addition, the
1 ...
20 ...
32 ...
36 ...
40 ...
60 ...
80 ... cover
Claims (12)
A first body portion to which an outer circumferential portion of the diaphragm portion is fixed;
An intermediate support member fixed to the diaphragm;
A voice coil fixed to the intermediate support member;
A magnetic circuit portion comprising a yoke having a bottom portion and a side wall portion, a permanent magnet fixed to a bottom portion of the yoke, and a plate fixed to an upper surface of the permanent magnet:
And a second body portion fixed to the magnetic circuit portion and coupled to a lower portion of the first body portion.
The intermediate support member is penetrated and fixed to the center portion, the outer peripheral portion of the slim speaker further comprises a spring damper of elastic material fixed to the first body portion.
The intermediate support member is narrow in shape and long in the longitudinal direction,
The intermediate support member is a slim speaker, characterized in that the central portion formed in the longitudinal direction is coupled to the diaphragm.
The diaphragm portion has a coupling portion formed in the center thereof in the longitudinal direction,
The intermediate support member is formed along the longitudinal direction in the middle portion thereof, and has a protrusion formed to protrude upwards,
Slim speaker characterized in that the protrusion of the intermediate support member is coupled to the coupling portion of the diaphragm.
Coupling portion of the diaphragm, slim speaker characterized in that the long hole formed so that the projection is inserted into the fixing.
Coupling portion of the diaphragm portion, a slim speaker, characterized in that the fitting groove is a narrow and long groove shape that can be fixed to the projection.
The intermediate support member,
A support part to which the voice coil is fixed to the lower side;
Is provided extending in the width direction in the support portion, provided with a plurality of reinforcing ribs formed spaced apart from each other along the longitudinal direction of the intermediate support member,
The protrusion is formed in the longitudinal direction on the upper portion of the support, the slim speaker characterized in that it comprises an extension protrusion formed on both sides longer than the length of the support.
The vibrating plate portion is composed of a vibrating edge portion, the outer peripheral portion of which is fixed to the first body portion, and a vibrating body portion coupled to the center portion of the vibrating edge portion,
The diaphragm portion is a slim speaker, characterized in that the central portion of the vibration body portion coupled to the intermediate support member is formed below the outer peripheral portion of the vibration edge portion.
The spring damper is fixed to the intermediate support member by an insert injection method, the slim speaker, characterized in that integrated with the intermediate support member.
The spring damper is a conductive metal,
Both ends of the coil constituting the voice coil, characterized in that the speaker electrically connected to the spring damper.
It is coupled to the lower portion of the first body portion, further comprising a cover portion coupled to seal the inner space including the second body portion,
The second body portion is provided with at least one rear sound emitting hole,
The first body portion, characterized in that the slim speaker characterized in that the at least one bass reflex hole communicated with the rear sound emitting hole and opened forward.
The rear sound emitting hole is provided with two, one each in one end and the other end in the longitudinal direction of the second body portion,
And two bass reflex holes, one adjacent to each of the rear sound emitting holes of the first body part, one at each of one end and the other end in the longitudinal direction.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100026900A KR101116307B1 (en) | 2010-03-25 | 2010-03-25 | Slim speaker |
PCT/KR2010/008409 WO2011118898A1 (en) | 2010-03-25 | 2010-11-25 | Slim-type speaker |
CN 201120176231 CN202150932U (en) | 2010-03-25 | 2011-03-25 | Thin type loudspeaker |
CN2011101418317A CN102316399A (en) | 2010-03-25 | 2011-03-25 | Thin speaker |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100026900A KR101116307B1 (en) | 2010-03-25 | 2010-03-25 | Slim speaker |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20110107648A KR20110107648A (en) | 2011-10-04 |
KR101116307B1 true KR101116307B1 (en) | 2012-03-14 |
Family
ID=44673932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020100026900A KR101116307B1 (en) | 2010-03-25 | 2010-03-25 | Slim speaker |
Country Status (3)
Country | Link |
---|---|
KR (1) | KR101116307B1 (en) |
CN (2) | CN102316399A (en) |
WO (1) | WO2011118898A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160029428A (en) * | 2014-09-05 | 2016-03-15 | 유옥정 | Vibration module for slim speaker and high-powered slim speaker including the vibration module |
WO2017213831A1 (en) * | 2016-06-07 | 2017-12-14 | Google Llc | Damping spring |
WO2018004872A1 (en) * | 2016-06-27 | 2018-01-04 | Google Llc | Bone conduction transducer with increased low frequency performance |
WO2019078481A1 (en) * | 2017-10-20 | 2019-04-25 | 삼성전자주식회사 | Speaker |
WO2019164174A1 (en) * | 2018-02-20 | 2019-08-29 | 김동만 | Stick-type vibrating driver |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101116307B1 (en) * | 2010-03-25 | 2012-03-14 | 주식회사 비에스이 | Slim speaker |
KR101394905B1 (en) * | 2013-04-15 | 2014-05-14 | 에스텍 주식회사 | System speaker |
KR102269152B1 (en) * | 2014-10-07 | 2021-06-25 | 삼성전자주식회사 | Speaker |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000102094A (en) * | 1998-09-28 | 2000-04-07 | Matsushita Electric Ind Co Ltd | Speaker |
JP2005323313A (en) * | 2004-05-11 | 2005-11-17 | Star Micronics Co Ltd | Electroacoustic transducer |
KR100828070B1 (en) * | 2006-12-11 | 2008-05-08 | 주식회사 진영지앤티 | A speaker and manufacturing thereof |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2880719B2 (en) * | 1988-12-23 | 1999-04-12 | フオスター電機株式会社 | Electric-vibration converter |
WO2004023843A1 (en) * | 2002-09-06 | 2004-03-18 | Namiki Seimitsu Houseki Kabushikikaisha | Vibration actuator device of portable terminal |
EP2369854A1 (en) * | 2002-11-28 | 2011-09-28 | Panasonic Corporation | Loudspeaker |
CN101040562A (en) * | 2005-09-21 | 2007-09-19 | 松下电器产业株式会社 | Speaker damper and speaker using the same |
US20080063234A1 (en) * | 2006-09-07 | 2008-03-13 | Citizen Electronics Co., Ltd. | Electroacoustic transducer |
JP2008219065A (en) * | 2007-02-28 | 2008-09-18 | Star Micronics Co Ltd | Electroacoustic transducer |
JP4885013B2 (en) * | 2007-02-28 | 2012-02-29 | スター精密株式会社 | Electroacoustic transducer |
JP5441710B2 (en) * | 2007-11-20 | 2014-03-12 | パナソニック株式会社 | Speaker, video equipment, and portable information processing apparatus |
WO2009139202A1 (en) * | 2008-05-13 | 2009-11-19 | ホシデン株式会社 | Electroacoustic transducer |
JP5049883B2 (en) * | 2008-06-02 | 2012-10-17 | ホシデン株式会社 | Speaker |
KR101116307B1 (en) * | 2010-03-25 | 2012-03-14 | 주식회사 비에스이 | Slim speaker |
-
2010
- 2010-03-25 KR KR1020100026900A patent/KR101116307B1/en not_active IP Right Cessation
- 2010-11-25 WO PCT/KR2010/008409 patent/WO2011118898A1/en active Application Filing
-
2011
- 2011-03-25 CN CN2011101418317A patent/CN102316399A/en active Pending
- 2011-03-25 CN CN 201120176231 patent/CN202150932U/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000102094A (en) * | 1998-09-28 | 2000-04-07 | Matsushita Electric Ind Co Ltd | Speaker |
JP2005323313A (en) * | 2004-05-11 | 2005-11-17 | Star Micronics Co Ltd | Electroacoustic transducer |
KR100828070B1 (en) * | 2006-12-11 | 2008-05-08 | 주식회사 진영지앤티 | A speaker and manufacturing thereof |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20160029428A (en) * | 2014-09-05 | 2016-03-15 | 유옥정 | Vibration module for slim speaker and high-powered slim speaker including the vibration module |
KR101667679B1 (en) * | 2014-09-05 | 2016-10-28 | 유옥정 | Vibration module for slim speaker and high-powered slim speaker including the vibration module |
WO2017213831A1 (en) * | 2016-06-07 | 2017-12-14 | Google Llc | Damping spring |
WO2018004872A1 (en) * | 2016-06-27 | 2018-01-04 | Google Llc | Bone conduction transducer with increased low frequency performance |
WO2019078481A1 (en) * | 2017-10-20 | 2019-04-25 | 삼성전자주식회사 | Speaker |
US11228841B2 (en) | 2017-10-20 | 2022-01-18 | Samsung Electronics Co., Ltd. | Speaker |
WO2019164174A1 (en) * | 2018-02-20 | 2019-08-29 | 김동만 | Stick-type vibrating driver |
US11510008B2 (en) | 2018-02-20 | 2022-11-22 | Actuward. Co. Ltd. | Stick-type vibrating driver |
Also Published As
Publication number | Publication date |
---|---|
KR20110107648A (en) | 2011-10-04 |
CN202150932U (en) | 2012-02-22 |
CN102316399A (en) | 2012-01-11 |
WO2011118898A1 (en) | 2011-09-29 |
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