EP3782379A1 - Actionneur magnétique destiné à un dispositif électronique et dispositif électronique comprenant ledit actionneur magnétique - Google Patents

Actionneur magnétique destiné à un dispositif électronique et dispositif électronique comprenant ledit actionneur magnétique

Info

Publication number
EP3782379A1
EP3782379A1 EP18737857.5A EP18737857A EP3782379A1 EP 3782379 A1 EP3782379 A1 EP 3782379A1 EP 18737857 A EP18737857 A EP 18737857A EP 3782379 A1 EP3782379 A1 EP 3782379A1
Authority
EP
European Patent Office
Prior art keywords
housing
magnet
magnet actuator
actuator
spacer
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.)
Granted
Application number
EP18737857.5A
Other languages
German (de)
English (en)
Other versions
EP3782379B1 (fr
Inventor
Jouni Tapio MÄKI
Jani SUIKKOLA
Jyrki LOHIKOSKI
Petri KESKIOPAS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of EP3782379A1 publication Critical patent/EP3782379A1/fr
Application granted granted Critical
Publication of EP3782379B1 publication Critical patent/EP3782379B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/02—Loudspeakers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/12—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated
    • G10K9/13—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers electrically operated using electromagnetic driving means
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/22—Mountings; Casings
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/07—Loudspeakers using bending wave resonance and pistonic motion to generate sound
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion

Definitions

  • the disclosure relates to a magnet actuator for use in an electronic device, the magnet actuator comprising a coil, a magnet, a first housing and a second housing.
  • Electronic devices may be provided with magnet actuators in order to generate, e.g., sound waves.
  • Prior art magnet actuators comprise magnets which either attract or repulse each other. Initially, the magnets are arranged in force equilibrium, but in order to generate sound waves the attractive or repulsive force between the magnets is changed by means of an electric current passing through a coil located between the magnets, the current causing at least one of the magnets to move such that the distance between the magnets decreases or increases.
  • the magnets may be interconnected by means of resilient support elements which counteract the attractive or repulsive force between the magnets such that the magnets and the resilient support element are in a force equilibrium state as long as no current is supplied.
  • the different components of the magnet actuator of GB2532436 are integrated into the device structure and arranged between the main elements of the device.
  • the appearance of the assembled electronic device can be assessed only after the force equilibrium state has been reached, i.e. after the main elements of the device have been assembled. Any possible defects, caused by dimensional tolerance variations of each separate element in the structure, variations in force between the magnets, or variations in the force caused by the resilient support element, will be visible only after assembly, and will subsequently be time consuming and costly to repair.
  • a magnet actuator for use in an electronic device, the magnet actuator comprising a coil, a magnet, a first housing and a second housing, the coil being at least partially located within, and fixed to, the first housing, the magnet being at least partially located within, and fixed to, the second housing, the first housing comprising a magnetic material, a magnetic field, generated by the magnet and the first housing causing an attractive force between the magnet and the first housing, the magnet and the first housing being in a force equilibrium state, wherein an air gap is provided between the magnet and the coil, and wherein manipulating electrical current in the coil causes a change in the attractive force, thereby causing a displacement between the magnet and the first housing.
  • a magnet actuator such as this wherein a magnet and a housing are in a force equilibrium state facilitates the manufacture of the electronic device in which the magnet actuator is placed.
  • the attractive force caused by the magnet and the housing are balanced from the start, such that the other components of the electronic device remain unaffected by, e.g., variations in the force or dimensional variation of the different components of the magnet actuator.
  • Such a solution reduces the number of defective electronic devices and hence manufacturing and repair costs.
  • the magnet actuator comprises exactly one magnet. I.e. the magnet actuator does not comprise a further magnet than the one mentioned .
  • the magnet actuator further comprises at least one spacer, the spacer being arranged to maintain the magnet and the first housing in a force equilibrium state by acting as a counterforce to the force caused by the magnetic field, allowing the magnet and the coil to be separated by an even air gap at all times.
  • the spacer is adapted for providing a first air gap between the magnet and the coil when the magnet actuator is in a first actuating end position, and a second air gap, smaller than the first air gap, between the magnet and the coil when the magnet actuator is in a second actuating end position, providing a space efficient magnet arrangement.
  • the spacer interconnects at least one of the first housing and the second housing, and the first housing and the magnet, allowing the magnet actuator to be configured as one integral component which is easily mounted in an electronic device.
  • the spacer is compressible and fixed to an inner surface of the first housing, the spacer being in an uncompressed state when the magnet actuator is in the first actuating end position, and the spacer being in a compressed state when the magnet actuator is in any position other than the first actuating end position, including the second actuating end position, facilitating a sufficiently strong yet spatially efficient magnet actuator.
  • the spacer comprises a flexible gasket.
  • the spacer comprises a dust shield connected to the first housing and the second housing, covering a gap between the first housing and the second housing, preventing dust
  • the spacer comprises a flexible gasket and a dust shield .
  • the first housing and the second housing guide the magnetic field to a space within at least one of the first housing and the second housing, preventing the magnetic fields from interfering with other objects.
  • the first housing and the second housing have an open end and a closed base connected by a surrounding wall, an inner periphery of one of the first housing and the second housing substantially corresponding to an outer periphery of the other of the first housing and the second housing, with allowance for movement between the first housing and the second housing, which is a simple yet reliable construction which provides sufficient protection for the magnet arrangement as well as efficiently limits the magnetic fields to the cavity formed by the first housing and the second housing.
  • first housing and the second housing are partially overlapping, allowing the magnet actuator to be assembled into, and maintained as, one integral part.
  • the first housing and the second housing comprise interconnecting flanges which connect when the magnet actuator is in a first actuating end position or a second actuating end position, preventing the components of the magnet actuator from separating regardless of which exterior forces are applied to the magnet actuator.
  • an electronic device comprising a movable surface, a device chassis, and a magnet actuator according to the above arranged between the movable surface and the device chassis, adapted to move the movable surface relative to the device chassis.
  • the movable surface may be a display of the electronic device.
  • the display can in such case be used as a so called "singing display”.
  • a first housing of the magnet actuator is attached to the movable surface, and a second housing of the magnet actuator is attached to the device chassis, or a second housing of the magnet actuator is attached to the movable surface and a first housing of the magnet actuator is attached to the device chassis, facilitating a very stable magnet actuator which can withstand large external forces.
  • movement of the movable surface generates vibrations within the electronic device to be used as haptic means or for generating sound waves.
  • a kit for assembling a magnet actuator comprising a magnet actuator according to the above, an assembly pin, a first housing of the magnet actuator comprising a through-going recess for receiving the assembly pin, a first end of the assembly pin being releasably connected to an inner surface of the second housing after having passed through the through-going recess, and a second end of the assembly pin being releasably connected to an outer surface of the first housing, such that the first housing and the second housing are interconnected, and a magnet and a coil maintained at a predefined distance from each other by means of the assembly pin .
  • Such a solution facilitates the assembly of the magnet actuator by ensuring that the air gap between the magnet and the coil is kept at the desired distance during the entire assembly phase, including while interconnecting the
  • the assembly pin is T-shaped, one leg of the assembly pin extending in the direction of an attractive force caused by a magnetic field within the magnet actuator, when the assembly pin has been received in the through-going recess, and one leg of the assembly pin extending in a plane perpendicular to the direction of the attractive force, facilitating a simple yet stable solution for ensuring that the air gap between the magnet and the coil is kept at the desired distance during assembly.
  • At least one of the magnet and a spacer comprises a further through-going recess adapted for accommodating the assembly pin, ensuring that the components of the magnet actuator remain in place during the entire assembly process, including while interconnecting the different components by means of adhesive.
  • Fig. 1 shows an exploded view of a magnet actuator in accordance with an embodiment of the present invention
  • Fig. 2a shows a partial, cross-sectional side view of the magnet actuator shown in Fig. 1;
  • Fig. 2b shows an exaggerated cross-sectional side view of the magnet actuator shown in Fig. 2a, wherein the magnet actuator is in a first actuating end position
  • Fig. 2c shows an exaggerated cross-sectional side view of the magnet actuator shown in Figs. 2a and 2b, wherein the magnet actuator is in a second actuating end position
  • Fig. 3 shows a perspective cross-sectional side view of an electronic device comprising the magnetic actuator shown in Figs. 1 and 2a-2c;
  • Fig. 4a shows a cross-sectional side view of a magnet actuator in accordance with an embodiment of the present invention
  • Fig. 4b shows a side view of the magnet actuator shown in Fig. 4a;
  • Fig. 5 shows a cross-sectional side view of a magnet actuator in accordance with a further embodiment of the present invention
  • Fig. 6 shows a cross-sectional side view of a magnet actuator in accordance with a further embodiment of the present invention
  • Fig. 7 shows a schematic cross-sectional side view of a magnet actuator in accordance with a further embodiment of the present invention.
  • Fig. 8 shows a schematic cross-sectional side view of a magnet actuator in accordance with a further embodiment of the present invention.
  • Figs. 1 and 2a-2c show an embodiment of a magnet actuator 1 in accordance with the present disclosure.
  • the magnet actuator 1 comprises a first housing 5, a second housing 6, a coil 3, and a magnet 4.
  • the coil 3 comprises a plurality of coil windings and is at least partially located within, and fixed to, the first housing 5.
  • the coil 3 is fixed to the inner surface 5a of the first housing 5 by means of adhesive.
  • the magnet 4 is at least partially located within, and fixed to, the second housing 6.
  • the magnet 4 is fixed to the inner surface 6a of the second housing 6 by means of adhesive.
  • magnet actuator 1 comprises exactly one magnet, i.e. the magnet 4. No other magnet is arranged between the housings 5 and 6.
  • the first housing 5 comprises a magnetic material, such as metal, wherefore the first housing 5 acts as a counterpart to the attractive static force F.
  • the magnet 4 located within the second housing 6, and the first housing 5 together generate a magnetic field which causes an
  • the first housing 5 and the second housing 6 guide, as well as limit, the magnetic field to a space within at least one of the first housing 5 and the second housing 6.
  • the magnetic field may be limited by the housing such that it fills the entire space within the housing.
  • the magnetic field may also be guided within the housing such that the magnetic field is at its strongest at a specific location within the housing, e.g. at the air gap described below.
  • the magnet 4 and the first housing 5 are in a force
  • the magnet actuator 1 comprises at least one spacer 8.
  • the spacer 8 is arranged to maintain the magnet 4 and the first housing 5 in the force equilibrium state by acting as a counterforce to the attractive force F caused by the magnetic field, and to maintain the size of the air gap, described in more detail below, between the magnet 4 and the coil 3 at a fixed height. Additionally, the spacer 8 prevents the first housing 5 and the second housing 6 from colliding and generating unwanted noise.
  • the force equilibrium state may also be achieved by means of the air gap size, the attractive force F, and the spring force of the surface which the magnet actuator is attached to.
  • the spacer 8 provides a first air gap 7a, i.e. an air gap having a specific height, between the magnet 4 and the coil 3 when the magnet actuator 1 is in the first actuating end position PI.
  • Fig. 2b shows the magnet actuator 1 in the first actuating end position PI, with exaggerated dimensions for the sake of clarity.
  • Fig. 2a shows a more realistic relationship between the air gap, the magnet, and the coil when the magnet actuator 1 is in the first actuating end position PI.
  • the first actuating end position PI means that the actuator is in its extreme, outer position, the position in which the height of the magnet actuator is as large as possible and where the maximum vibration amplitude is reached during displacement due to electrical current.
  • the spacer 8 furthermore provides a second air gap 7b, i.e. an air gap which has a smaller height than the first air gap 7a, between the magnet 4 and the coil 3 when the magnet actuator 1 is in a second actuating end position P2.
  • the second air gap 7b refers to the physically same air gap as the first air gap 7a, but having a different height.
  • the second actuating end position P2 means that the actuator is in its extreme, inner position, the position in which the height of the magnet actuator is as small as possible and
  • the spacer 8 interconnects either the first housing 5 and the second housing 6, the first housing 5 and the magnet 4, or both.
  • the spacer 8 is compressible, e.g. in the form of a flexible, resilient gasket 8a, and fixed to an inner surface 5a of the first housing 5, e.g. by means of adhesive.
  • the spacer 8 is in an uncompressed state when the magnet actuator 1 is in the first actuating end position PI, as shown in Fig. 2b.
  • the magnet actuator 1 is in the first actuating end position PI.
  • the spacer 8 is in a compressed state when the magnet actuator 1 is in any position other than the first actuating end position PI, including the second actuating end position P2 shown in Fig. 2c.
  • Such a compressible spacer also functions as suspension for the magnet actuator.
  • the spacer 8 comprises a flexible dust shield 8b connected to the first housing 5 and the second housing 6, preferably the outer peripheral surfaces of the first housing 5 and the second housing 6 such that it covers any circumferential gap present between the first housing 5 and the second housing 6.
  • the spacer 8 comprises a flexible gasket 8a as well as a dust shield 8b.
  • the first housing 5 and the second housing 6 both have an open end 9 and a closed base 10 which is connected by a surrounding wall 11, such that both the first housing 5 and the second housing 6 are cup-shaped.
  • first housing 5 and the second housing 6 have the exact same inner and outer dimensions.
  • the cross-section of the first housing 5 and the second housing 6, and hence the magnet actuator 1 may be circular, rectangular, or square.
  • the inner periphery of one of the first housing 5 and the second housing 6 corresponds substantially to the outer periphery of the other of the first housing 5 and the second housing 6, with allowance for movement between the first housing 5 and the second housing 6.
  • the first housing 5 and the second housing 6 may, in such an embodiment, be arranged such that they partially overlap. This is shown in Figs. 7 and 8.
  • the first housing 5 and the second housing 6 may comprise interconnecting flanges 12 which connect when the magnet actuator 1 is in a first actuating end position PI or a second actuating end position P2 as shown schematically in Fig 8.
  • the flanges of one housing extend inwards, in a direction towards the interior of the housing, while the flanges of the other housing extend outwards, in a direction from the interior of the housing.
  • the surrounding wall 11 of the housing which has an inner periphery which corresponds substantially to the outer periphery of the other housing, i.e.
  • the surrounding wall 11 of the housing having larger inner dimensions extends past the flanges of the other housing, having smaller inner dimensions, such that the flanges of the housing having smaller inner dimensions are enclosed by the wall 11 and the flanges 12 of the housing having larger inner dimensions.
  • the flanges overlap such that the first housing 5 and the second housing 6 cannot be separated.
  • the present disclosure further relates to an electronic device 2, partially shown in Fig. 3, comprising a movable surface 13 such as a display, a device chassis 14, and a magnet actuator 1.
  • the magnet actuator 1 is arranged between the movable surface 13 and the device chassis 14, and adapted to move the movable surface 13 relative to the device chassis 14. Movement of the movable surface 13 generates vibrations within the electronic device 2, such as e.g. sound waves. By this a so called “singing display” is achieved.
  • a back cover is arranged adjacent the side of the device chassis 14 which is the farthest away from the magnet actuator 1.
  • first housing 5 of the magnet actuator 1 is attached to the movable surface 13, and the second housing 6 of the magnet actuator 1 is attached to the device chassis 14.
  • second housing 6 of the magnet actuator 1 is attached to the movable surface 13 and the first housing 5 of the magnet actuator 1 is attached to the device chassis 14.
  • the present disclosure also relates to a kit for assembling the magnet actuator 1, comprising the magnet actuator 1 and an assembly pin 15.
  • the first housing 5 of the magnet actuator 1 comprises a through-going recess 16a for receiving the assembly pin 15.
  • a first end 15a of the assembly pin 15 is releasably connected to the inner surface 6a of the second housing 6 after having passed through the through-going recess 16a.
  • the first end 15a may be inserted into a recess provided in the inner surface 6a, and releasably connected by means of e.g. threading.
  • a second end 15b of the assembly pin 15 is releasably connected to the outer surface 5b of the first housing 5, such that the first housing 5 and the second housing 6 are interconnected, and the magnet 4 and the coil 3 maintained at a predefined distance from each other by means of the assembly pin 15 during assembly.
  • the components of the magnet actuator may be glued together, during which time the assembly pin 15 maintains all components in their correct locations. Once the components of the magnet actuator have been fixedly interconnected, by means of e.g. adhesive, the assembly pin 15 may be removed by removing it from the inner surface 6a and the outer surface 5b and pulling it out from the through-going recess 16a.
  • the assembly pin 15 may have any suitable shape.
  • the assembly pin 15 is T-shaped, and inserted into the magnet actuator 1 such that one leg of the assembly pin 15 extends in the direction of the attractive force F caused by a magnetic field within the magnet actuator 1, when the assembly pin 15 has been received in the through- going recess 16a, and such that the other leg of the assembly pin 15 extends in a plane P perpendicular to the direction of the attractive force F.
  • the magnet 4, the spacer 8, or both also comprise a through-going recess 16b adapted for
  • the through-going recess 16 comprises both a through-going recess 16a and through-going recesse 16b.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Signal Processing (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

L'invention concerne un actionneur magnétique (1) destiné à être utilisé dans un dispositif électronique (2) qui comprend une bobine (3), un aimant (4), un premier boîtier (5) et un second boîtier (6), la bobine (3) étant au moins partiellement située à l'intérieur du, et fixée au, premier boîtier (5), l'aimant (4) étant au moins partiellement situé à l'intérieur du, et fixé au, second boîtier (6). Le premier boîtier (5) comprend un matériau magnétique, et un champ magnétique, généré par l'aimant (4) et le premier boîtier (5) provoque une force d'attraction (F) entre l'aimant (4) et le premier boîtier (5), l'aimant (4) et le premier boîtier (5) étant dans un état d'équilibre de force, un entrefer (7) étant prévu entre l'aimant (4) et la bobine (3). La manipulation d'un courant électrique dans la bobine (3) provoque un changement de la force d'attraction (F), provoquant ainsi un déplacement entre l'aimant (4) et le premier boîtier (5), permettant à des vibrations d'être générées à l'intérieur du dispositif électronique (2).
EP18737857.5A 2018-06-29 2018-06-29 Actionneur à aimant pour appareil électronique Active EP3782379B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/067634 WO2020001787A1 (fr) 2018-06-29 2018-06-29 Actionneur magnétique destiné à un dispositif électronique et dispositif électronique comprenant ledit actionneur magnétique

Publications (2)

Publication Number Publication Date
EP3782379A1 true EP3782379A1 (fr) 2021-02-24
EP3782379B1 EP3782379B1 (fr) 2024-10-16

Family

ID=62842092

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18737857.5A Active EP3782379B1 (fr) 2018-06-29 2018-06-29 Actionneur à aimant pour appareil électronique

Country Status (3)

Country Link
EP (1) EP3782379B1 (fr)
CN (1) CN112042210B (fr)
WO (1) WO2020001787A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115914951B (zh) * 2021-09-30 2024-06-25 华为技术有限公司 扬声器及电子设备

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA51671C2 (uk) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Акустичний пристрій
WO2000070905A2 (fr) * 1999-05-14 2000-11-23 Matsushita Electric Industrial Co., Ltd. Transducteur electromagnetique
KR100698256B1 (ko) * 2004-07-16 2007-03-22 엘지전자 주식회사 디스플레이 윈도우를 이용한 스피커 장치
KR200401424Y1 (ko) * 2005-09-08 2005-11-15 이동원 골전도(骨傳導)스피커
WO2013059196A1 (fr) * 2011-10-17 2013-04-25 The Guitammer Company Transducteur et actionneur de vibration
DE102013110029C5 (de) * 2013-09-12 2017-03-16 Bürkert Werke GmbH Elektrodynamischer Aktor
US9420377B2 (en) * 2013-10-30 2016-08-16 Htc Corporation Audio playback device
CN105323693B (zh) * 2014-07-28 2018-12-18 美特科技(苏州)有限公司 一种扬声器组装方法
GB2532436B (en) 2014-11-18 2017-01-11 Ps Audio Design Oy Loudspeaker apparatus
DE102016111872A1 (de) * 2016-06-29 2018-01-04 Arno Heinen Breitband-Exciter
CN205847579U (zh) * 2016-07-21 2016-12-28 瑞声科技(新加坡)有限公司 发声装置

Also Published As

Publication number Publication date
WO2020001787A1 (fr) 2020-01-02
EP3782379B1 (fr) 2024-10-16
CN112042210B (zh) 2022-04-29
CN112042210A (zh) 2020-12-04

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