WO2011118898A1 - Haut-parleur de faible épaisseur - Google Patents

Haut-parleur de faible épaisseur Download PDF

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Publication number
WO2011118898A1
WO2011118898A1 PCT/KR2010/008409 KR2010008409W WO2011118898A1 WO 2011118898 A1 WO2011118898 A1 WO 2011118898A1 KR 2010008409 W KR2010008409 W KR 2010008409W WO 2011118898 A1 WO2011118898 A1 WO 2011118898A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
support member
fixed
intermediate support
body portion
Prior art date
Application number
PCT/KR2010/008409
Other languages
English (en)
Korean (ko)
Inventor
이계수
Original Assignee
주식회사 비에스이
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 주식회사 비에스이 filed Critical 주식회사 비에스이
Publication of WO2011118898A1 publication Critical patent/WO2011118898A1/fr

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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
    • 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

Definitions

  • 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.
  • 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 especially long in one direction with respect to the width, among the speakers.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the diaphragm portion has a coupling portion formed in the center portion in the longitudinal direction
  • 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,
  • the protrusion of the intermediate support member is coupled to the engaging portion of the diaphragm portion.
  • 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.
  • the fitting groove is a narrow and long groove shape that can be fixed to the projection portion.
  • 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.
  • 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.
  • the spring damper is preferably fixed to the intermediate supporting member by an insert injection method, and is integrated with the intermediate supporting member.
  • 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.
  • the first body portion 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.
  • 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.
  • 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.
  • 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.
  • FIG. 1 is a schematic perspective view of a slim speaker of one embodiment according to the present invention.
  • FIG. 2 and 3 are schematic cross-sectional views taken along lines II-II and III-III of FIG. 1, respectively;
  • FIGS. 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;
  • FIG. 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;
  • FIG. 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.
  • FIG. 13 is a perspective view of a magnetic circuit unit coupled to the cover unit
  • FIG. 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.
  • FIG. 1 is a schematic perspective view of a slim speaker of one embodiment according to the present invention
  • 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 slim speaker 1 of the present embodiment is mainly used for a video device such as a TV or various audio devices, and is a speaker having a shape in which the length in one side is relatively longer than the length in the other direction as a whole.
  • the slim speaker 1 includes a diaphragm part 10, a first body part 20, an intermediate support member 30, a voice coil 40, a magnetic circuit part 50, and a second body part 60. It is composed.
  • the slim speaker 1 of the present embodiment further includes a spring damper 70 and a cover portion 80.
  • the diaphragm portion 10 generates sound pressure while vibrating.
  • the diaphragm 10 is generally narrow in shape and long in the longitudinal direction. Looking at the diaphragm 10 from above, both ends in the longitudinal direction are close to the semicircle, and the intermediate portion connecting the both ends is a direct fire shape.
  • the diaphragm portion 10 may be referred to as a long oval or may be referred to as an oval track type.
  • the diaphragm part 10 is normally manufactured with a high molecular compound. On the other hand, the specific material and thickness of the diaphragm portion can be variously modified as necessary.
  • the diaphragm part 10 is provided with the engaging part 12 extended along the longitudinal direction in the center part.
  • Coupling portion 12 indicates a portion to which the intermediate support member 30 is coupled. Coupling portion 12 is straight.
  • the outer peripheral part 11 which points to the outer part is couple
  • the diaphragm portion 10 includes a vibration edge portion 14 and a vibration body portion 16.
  • the vibration edge portion 14 is a portion formed to be convex upward on the outer portion.
  • the vibration edge portion 14 is made of a relatively soft material compared to the vibration body portion 16.
  • Vibration body portion 16 is coupled to the center portion of the vibration edge portion (14). Vibration body portion 16 is made of a relatively strong material.
  • the vibrating body portion 16 is made of a separate component from the vibrating edge portion 14, and then attached to the vibrating edge portion 14 by a method such as adhesive or heat welding.
  • the vibration plate portion may be formed integrally with the vibration edge portion and the vibration body portion.
  • the diaphragm portion 10 is formed such that the central portion is located below the outer peripheral portion 11 on both sides. That is, referring to FIG. 3, the coupling part 12 located at the center of the diaphragm part 10 is below, and the outer circumferential part 11 of the vibration edge parts 14 on both sides is on the upper part of the diaphragm part 10. ) Is an inverted cone, or a shape similar to "V".
  • the intermediate support member 30 is coupled to the coupling portion 12 of the diaphragm 10, and the voice coil 40 is coupled to the intermediate support member 30.
  • the driving force by the action of the magnetic circuit part 50 and the voice coil 40 is transmitted to the diaphragm part 10 by the coupling part 12.
  • the diaphragm 10 Since the diaphragm 10 has such a configuration, the twisted shape is minimized even during vibration, and the loss of the vertical driving command is prevented, and high quality can be achieved by implementing a uniform phase.
  • the outer circumferential portion 11 of the diaphragm portion 10 is fixed to the first body portion 20.
  • the first body portion 20 has a long hole shape in which one axis is formed longer than the other axis so as to correspond to the shape of the diaphragm 10 in the center portion thereof.
  • the outer circumferential portion 11 of the diaphragm portion 10 is fixed to such a hole by an adhesive or the like.
  • the first body portion 20 is in the shape of a long hexahedron as a whole.
  • the first body portion 20 is in communication with the rear sound emitting hole 62 formed in the second body portion 60 (see FIG. 12), and the base reflex hole (bass opening toward the front) a reflex hole (22) is formed.
  • “Front” means the direction in which the sound generated by the diaphragm 10 is transmitted.
  • the upward direction in FIG. 1 is "forward".
  • 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 first body portion 20 are provided with holes 24 for fixing the slim speaker, respectively. Terminal portions 26 are provided on both sides of the hole 24 to expose terminals electrically connected to the internal voice coil 40.
  • the intermediate support member 30, which is one of the most essential features of the present invention, is disposed between the voice coil 40 and the diaphragm 10, the driving force of the voice coil 40 to the diaphragm It serves to deliver to the unit (10).
  • the voice coil 40 is fixed to the intermediate support member 30, the intermediate support member 30 adopts a configuration fixed to the diaphragm 10, the movement of the voice coil 40 in the vertical direction Can be effectively transmitted to the diaphragm portion 10.
  • the intermediate support member 30 is made of a nonconductive material having elasticity and rigidity, such as synthetic resin.
  • the intermediate support member 30 is narrow in shape and long in the longitudinal direction so as to correspond to the shape of the diaphragm 10.
  • the middle support member 30 has a central portion elongated along the longitudinal direction is coupled to the central portion of the diaphragm portion 10 in a straight line shape.
  • the intermediate support member 30 has a protrusion 36 formed in the center portion thereof in a lengthwise direction in the longitudinal direction and protruding upward. Projection portion 36 is coupled to the coupling portion 12 is formed long in the longitudinal direction in the center portion of the diaphragm (10).
  • the engaging portion 12 of the diaphragm 10 is a long hole 13 formed to penetrate long in the longitudinal direction.
  • the long hole 13 is inserted and fixed to the projection 36 formed in the intermediate support member (30).
  • a protrusion 36 is inserted into the long hole 13, and an adhesive is applied to a portion where the coupling portion 12 and the intermediate support member 30 of the diaphragm portion are in contact with each other to couple the two.
  • the long hole 13 formed in the coupling portion 12 of the diaphragm 10 may be modified into a fitting groove form (13a) (see Fig. 14).
  • the fitting groove 13a has a narrow and long groove shape in which the protrusion 36 of the intermediate support member 30 can be fitted and fixed.
  • the inlet width of the fitting groove 13a may be configured to be slightly smaller than the width of the protrusion 36. Since the fitting groove 13a is made of a material having elasticity, when the protrusion 36 is inserted, the fitting groove 13a is elastically deformed and is mutually coupled with the protrusion. An adhesive is applied to the mutual contact surface of the fitting groove 13a and the protrusion 36 to further increase the bonding force.
  • the intermediate support member 30 includes a support 32, a reinforcing rib 34, a protrusion 36, and a protrusion extension 38.
  • the said support part 32 is a part to which the voice coil 40 is fixed to the lower surface.
  • the support part 32 has a size and a shape to which the voice coil 30 formed by winding the coil in a long oval shape can be attached.
  • the reinforcing rib 34 is formed in the support part 32.
  • the reinforcing rib 34 is a structure for securing the rigidity of the intermediate support member 30 in the width direction.
  • the support part 32 is formed to extend in the width direction.
  • a plurality of reinforcing ribs 34 are provided and spaced apart from each other along the longitudinal direction of the intermediate support member 30.
  • the protrusion part 36 is formed in the upper part of the support part 32 along the longitudinal direction.
  • the protrusion 36 includes an extension protrusion 38 formed longer on both sides than the support 32.
  • the protrusion 36 is long and coupled to the middle portion of the diaphragm 10, and not only supports the diaphragm 10, but also serves to transmit the driving force of the magnetic circuit unit 50 to the diaphragm 10.
  • the extension protrusion 38 is coupled to extend up to both ends of the longitudinal direction of the diaphragm 10, thereby more effectively performing the role of preventing the deformation of the diaphragm 10.
  • the voice coil 40 is fixed to the intermediate support member 30. As illustrated in FIG. 7, the voice coil 40 is formed by winding and winding up and down the conductor coils in a long oval shape.
  • the voice coil 40 is provided with the bobbin 42 in which the coil is wound inside.
  • the lower portion of the support 23 of the intermediate support member 30 is coupled to the bobbin 42.
  • the voice coil 40 is electrically connected to the spring damper 70.
  • the outer terminals 73 and 75 of the spring damper 70 are exposed to the outside and electrically connected to an external power source.
  • the lower part of the voice coil 40 is located in the magnetic gap formed in the magnetic circuit section 50. Due to the interaction between the electric field generated when the electrical signal flows through the voice coil 40 and the magnetic field formed in the magnetic gap of the magnetic circuit unit 50, the voice coil 40 is moved by an upward and downward direction. The movement of the voice coil 40 is transmitted to the intermediate support member 30 to which the voice coil 40 is fixed, and again the movement of the intermediate support member 30 is transmitted to the diaphragm portion 10, and eventually the diaphragm portion. 10 will vibrate and generate a sound pressure.
  • the magnetic circuit unit 50 includes a yoke 54, a permanent magnet 56, and a plate 58.
  • the yoke 54 includes a bottom portion 51 and a side wall portion 52.
  • the yoke 50 is made of a magnetically permeable material.
  • the side wall portion 52 of the yoke 54 is fixed to a hole formed in the middle of the second body portion 60.
  • the inside of the yoke 54 is provided with a recessed receiving groove.
  • the upper end of the side wall portion 52 of the yoke 54 extends in the horizontal direction toward the outside and has a jaw portion. The jaw portion is fixed over the hole formed in the second body portion 60.
  • the permanent magnet 56 is fixed to the bottom portion 53 of the yoke 54.
  • the permanent magnet 56 also has a long cross-sectional shape in the shape of a long oval.
  • the plate 58 has the same planar shape as the permanent magnet 56, and is fixed to the upper side of the permanent magnet 56. Plate 58 is made of a material that allows magnetic force to pass through.
  • the magnetic gap is a space formed between the side wall 52 of the yoke, the permanent magnet 56 and the plate 58, and is a space in which magnetic force lines are distributed.
  • the magnetic circuit part 50 is fixed to a hole formed therein.
  • the second body part 60 is coupled to the lower part of the first body part 20 and is located in an inner space defined by the first body part 20 and the cover part 80.
  • the second body part 60 is provided with a rear sound emitting hole 62.
  • the back sound emitting hole 62 is in communication with a bass reflex hole 22 formed to open forwardly to the first body portion 20.
  • the rear sound emitting hole 62 is located behind the diaphragm 10.
  • an intermediate support member 30 is penetrated and fixed to a central portion thereof, and an outer circumferential portion thereof is fixed to the first body portion 20.
  • the spring damper 70 is made of a material having elasticity, and allows the vibration of the diaphragm 10 to be prevented from being twisted, and controls the spring damper 70 to move only in the vertical direction.
  • the spring damper 70 is formed by removing a part of a conductive metal plate such as phosphor bronze. Referring to FIG. 6, the spring damper 70 is composed of the middle portions 72 and 74 and the terminal portions 73 and 75 extending from the respective portions. Both ends of the coil constituting the voice coil 40 are electrically connected to the spring damper 70. The terminal parts 73 and 75 are exposed to the outside and may be connected to an external power source.
  • the spring damper may be made of a nonconductive polymer elastic material.
  • a separate arrangement for electrical connection of the voice coil should be provided.
  • the spring damper 70 is fixed to the intermediate support member 30 by an insert injection method and is integrated with the intermediate support member 30.
  • the outer circumferential portion of the spring damper 70 is fixed to the first body portion 20 in various ways. That is, it may be fitted and fixed to the coupling groove provided in the first body portion, or, if necessary, may be fixed to the first body portion 20 by an insert injection method.
  • the spring damper 70 is fixed to the intermediate support member 30, the diaphragm portion 10 is fixed to the protrusion 36 of the intermediate support member 30, and the intermediate support member 30 is
  • the voice coil 40 coupled to the bottom is shown in a schematic cross-sectional perspective view.
  • the cover portion 80 is coupled to the lower portion of the first body portion 20 to seal the internal space.
  • the hole in which the yoke 54 is fixed is formed in the center part of the cover part 80, the hole is sealed by the yoke 54.
  • FIG. 13 the state in which the magnetic circuit portion 50 is coupled to the lid portion 80 with the second body portion 60 removed is shown in a perspective view.
  • the central portion of the diaphragm portion 10 is attached to the central portion of the diaphragm portion 10 along a straight line, the long coil shape of the voice coil 40 is abnormally vibrated and deformed during driving. Due to the characteristic change is prevented and there is an advantage that the loss of the driving force generated in the magnetic circuit is minimized. In addition, it is possible to maximize the driving force transmission by reducing the adhesive area between the diaphragm portion and the intermediate support member 30 in a straight line shape.
  • the shape of the diaphragm 10 in the shape of a cone (V) or an inverted cone shape as a whole, to minimize the distortion during the vibration of the diaphragm to prevent the loss of the vertical driving force, uniform phase By implementing this, there is an advantage that high sound quality can be realized.
  • the spring supporting damper 70 is inserted into the intermediate support member 30, thereby improving assembly productivity, enhancing durability for long time use, and further reducing the overall volume.
  • the coupling part of the diaphragm is provided with a long hole 13
  • the intermediate support member 30 is provided with a projection 36 inserted into the long hole, it is possible to enhance the strength of mutual adhesion, fixing between the diaphragm and the intermediate support member. There is an advantage.
  • the intermediate support member 30 is provided with extension protrusions 38 extending to both sides in the longitudinal direction to support the diaphragm portion 10 in its entirety, thereby preventing deformation of the diaphragm portion that may occur during vibration. have.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention concerne un haut-parleur de faible épaisseur comprenant : un diaphragme de forme étroite et longue dans sa direction longitudinale ; un premier corps fixé à la circonférence extérieure du diaphragme ; et un élément de support intermédiaire fixé au diaphragme ; une bobine vocale fixée à l'élément de support intermédiaire ; un circuit magnétique comprenant une culasse ayant une partie inférieure et une paroi latérale, un aimant permanent fixé à la base de la culasse, et une plaque fixée à la surface supérieure de l'aimant permanent ; et un second corps fixé au circuit magnétique et relié à une partie inférieure du premier corps.
PCT/KR2010/008409 2010-03-25 2010-11-25 Haut-parleur de faible épaisseur WO2011118898A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020100026900A KR101116307B1 (ko) 2010-03-25 2010-03-25 슬림형 스피커
KR10-2010-0026900 2010-03-25

Publications (1)

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WO2011118898A1 true WO2011118898A1 (fr) 2011-09-29

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KR (1) KR101116307B1 (fr)
CN (2) CN202150932U (fr)
WO (1) WO2011118898A1 (fr)

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KR101116307B1 (ko) * 2010-03-25 2012-03-14 주식회사 비에스이 슬림형 스피커
KR101394905B1 (ko) * 2013-04-15 2014-05-14 에스텍 주식회사 시스템 스피커
KR101667679B1 (ko) * 2014-09-05 2016-10-28 유옥정 슬림 스피커용 진동모듈 및 이를 포함하는 고성능 슬림 스피커
KR102269152B1 (ko) * 2014-10-07 2021-06-25 삼성전자주식회사 스피커
US10178469B2 (en) * 2016-06-07 2019-01-08 Google Llc Damping spring
US9998829B2 (en) * 2016-06-27 2018-06-12 Google Llc Bone conduction transducer with increased low frequency performance
KR102499257B1 (ko) * 2017-10-20 2023-02-14 삼성전자주식회사 스피커
KR102044846B1 (ko) * 2018-02-20 2019-11-14 김동만 스틱형 진동 드라이버

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Publication number Priority date Publication date Assignee Title
JPH02170798A (ja) * 1988-12-23 1990-07-02 Foster Electric Co Ltd 電気―振動変換器
JP2000102094A (ja) * 1998-09-28 2000-04-07 Matsushita Electric Ind Co Ltd スピーカ
JP2005323313A (ja) * 2004-05-11 2005-11-17 Star Micronics Co Ltd 電気音響変換器
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CN202150932U (zh) 2012-02-22
KR20110107648A (ko) 2011-10-04
KR101116307B1 (ko) 2012-03-14
CN102316399A (zh) 2012-01-11

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