EP3954133A1 - Vibration actuator for rigid structures for high-performance bass playback in automobiles - Google Patents
Vibration actuator for rigid structures for high-performance bass playback in automobilesInfo
- Publication number
- EP3954133A1 EP3954133A1 EP20718308.8A EP20718308A EP3954133A1 EP 3954133 A1 EP3954133 A1 EP 3954133A1 EP 20718308 A EP20718308 A EP 20718308A EP 3954133 A1 EP3954133 A1 EP 3954133A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- actuator
- magnet
- housing
- spring
- spring element
- 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
Links
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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
-
- 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
-
- 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
- H04R9/18—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
-
- 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
-
- 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
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1058—Manufacture or assembly
- H04R1/1075—Mountings of transducers in earphones or headphones
-
- 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
- H04R11/14—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/006—Interconnection of transducer parts
-
- 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
- H04R9/025—Magnetic circuit
-
- 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
- H04R9/066—Loudspeakers using the principle of inertia
-
- 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
-
- 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
- H04R2400/07—Suspension between moving magnetic core and housing
-
- 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
- H04R2499/13—Acoustic transducers and sound field adaptation in vehicles
Definitions
- the invention relates to an actuator for exciting at least one component of a motor vehicle with vibrations, a component arrangement with such an actuator and a motor vehicle with such a component arrangement.
- Loudspeakers for reproducing particularly low tones are often built into a housing in the vehicle interior. This already includes the resonance volume adapted for the loudspeaker.
- loudspeaker-housing combinations have the aforementioned disadvantages, such as, in particular, a large volume and a high weight.
- the invention preferably relates to an actuator for exciting at least one component of a motor vehicle with vibrations.
- the actuator has a housing which is designed to be connected to the component.
- the actuator has an electrical coil which is rigidly connected to the housing and is designed to generate a magnetic field when an electrical current flows through it.
- the actuator has a magnet which is arranged in the housing so that it can move to a limited extent.
- the at least one component which is excited to vibrate by the actuator is particularly preferably a structure of several components, very particularly preferably comprising the housing.
- the actuator can preferably such components in a suitable manner
- the actuator for a rigid structure is designed as a component to be stimulated for high-performance bass reproduction in the automotive sector.
- the actuator itself does not emit sound, but stimulates structures that are already present in the vehicle, at least one of them as a component to be excited, to vibrate.
- the structure forms vibrations and ultimately emits sound in an advantageous manner compared to conventional subwoofers. No additional resonance volume is necessary.
- the space requirement is reduced to a minimum.
- the actuator is advantageously 5-10 times smaller and 2-5 times lighter than a conventional subwoofer.
- One purpose of the actuator can, for example, be to prevent vibrations or
- the structure expediently comprises a plurality of components, in particular components connected to one another, which are jointly or partially excited to vibrate.
- the actuator is preferably designed so that it is particularly suitable for reproducing low tones or bass reproduction, the actuator for frequencies below 100 Hz or 200 Hz, in particular below 100 Hz or 200 Hz down to at least 60 Hz, particularly preferably down at least 40Hz, in each case expediently with an amplitude drop of up to -6dB, especially -3dB, is or is also suitable.
- the actuator is useful for playing a
- the actuator is designed so that it can continuously generate a sound pressure level of at least 80 dB for at least one hour.
- the housing of the actuator is preferably connected directly to the component or indirectly via at least one fastening means.
- the connection between the housing and the component is directly or indirectly embodied in particular essentially rigid and / or rigid.
- the component is expediently designed as one of the following structures of a motor vehicle, floor pan, door structural panel, trunk lid, spare wheel recess, roof structure, cross member, fender, longitudinal member, door carrier, end wall or frame part and in particular as one of the following structures: floor plate, trunk lid or end wall.
- This structure is particularly preferably designed as a carbon and / or glass fiber reinforced plastic GRP and / or carbon fiber reinforced plastic CFRP.
- GRP glass fiber reinforced plastic
- CFRP carbon fiber reinforced plastic
- the vibrations are preferably mechanical vibrations. This can be expressed, for example, in a vibration of the actuator. Such vibrations can be transmitted to at least one component, which then also executes corresponding vibrations.
- the vibrations of the actuator are preferably vibrations which, after being transmitted to at least one component, lead to the emission of airborne sound waves or the generation of sound waves which then propagate further through the air.
- the vibrations can have frequencies between 20 Hz and 20 kHz, which roughly corresponds to a typical human hearing range.
- the actuator preferably has an electrical connection, for example by means of a plug or clamp connection, which can be fully or partially integrated into the housing and is electrically connected to the coil.
- a cable for example, can be used for this. This can form an electrical connection between the connection and the coil.
- Such a cable can also be used, for example, to arrange the electrical connection away from the housing.
- the electrical connection is advantageously rigidly connected to the housing. In this way, in particular, a relative movement between the electrical connection and the housing can be prevented, which can prevent wear.
- An electrical connection between the electrical connection and the coil is preferably completely fixed on the housing. This allows a relative movement between the electrical connection, for example a cable, and the Housing can be effectively prevented. This avoids friction and fatigue of the materials and thus wear and tear.
- the magnet can preferably be excitable and / or deflectable in particular by means of the magnetic field generated by the coil. This can generate vibrations.
- the magnet can preferably be movable in only one spatial direction defined in the housing.
- a spatial direction can correspond to a combination of a direction and an exactly opposite direction. In other words, the magnet can be moved one-dimensionally along an axis defined in the housing.
- the actuator preferably has a spring arrangement which is designed to bias the magnet into a rest position. From this rest position, the magnet can then be deflected in particular by means of the magnetic field generated by the coil already mentioned.
- the spring arrangement can preferably be designed to reset the magnet to the rest position along every possible direction of movement.
- the possible directions of movement can be, for example, those directions which are defined by the spatial direction already mentioned above.
- the spring arrangement preferably has a first spring element and a second spring element, the magnet being held between the first spring element and the second spring element.
- the first spring element preferably prestresses the magnet in a first direction.
- the second spring element preferably prestresses the magnet in a second direction or orientation opposite to the first. This can be particularly advantageous if, as already mentioned above, the magnet can be moved in a spatial direction or only one-dimensionally. Then the magnet is biased in both directions by the spring arrangement.
- the spring element or the first spring element preferably has a number of spring arms for pretensioning the magnet.
- the second spring element also preferably has a number of spring arms for pretensioning the magnet.
- the spring arms of the first spring element can preferably be arranged in a star shape or in a spiral shape.
- the spring arms of the second spring element can also preferably be arranged in a star shape or in a spiral shape. In the middle of such a star shape, for example, the magnet can be fastened, the spring effect resulting therefrom having proven to be advantageous.
- the arrangement of the spring arms is expediently designed symmetrically or, alternatively, preferably asymmetrically, in order to prevent natural vibrations.
- the asymmetry is particularly preferred as
- the material thickness or material thickness of the spring elements can preferably be designed to be constant or in particular to be of different thickness. So it is useful to provide different thicknesses at different points of the spring elements in order to have special vibration properties and special
- a spring element can be made more progressive through profiling
- At least one spring arm or the spring arms and / or at least one spring element is designed profiled in order to increase the rigidity and the
- Profiling is included particularly preferably carried out by at least one rib and / or at least one bead and / or at least one edge and / or at least one curvature, very particularly preferably for each spring arm and / or each spring element.
- the first spring element and the second spring element are preferably as far away from each other as possible and / or are arranged at opposite ends of the housing within the housing.
- the magnet is suitably preloaded into its rest position in any position of the housing relative to the earth's surface or to another external element and can be deflected by the magnetic field as intended without restriction.
- the greatest possible distance can relate in particular to the spatial direction already mentioned above, which indicates an axial movement of the magnet.
- the spring elements can be made from plastics, metals or composite materials, for example. This can influence the acoustic behavior. In particular, this can influence the damping behavior of the spring elements.
- the spring elements are particularly preferred, in particular additionally,
- the magnet can preferably be movable within the coil.
- Mobility within the coil a particularly good effect of the magnetic field generated by the coil is achieved.
- the actuator preferably has a ring as a housing or housing part, which surrounds the coil and is made of magnetically conductive and / or thermally conductive material. By making it from magnetically conductive material, a magnetic connection can be generated laterally to the coil in a preferred manner. The effect of the magnetic field generated by the coil is thereby considerably improved.
- the housing of the actuator is preferably made of a material with a thermal conductivity of at least 25 W / (m K), in particular of
- the housing of the actuator preferably has a heat capacity of at least 0.08 kJ / K, in particular of at least 0.1 kJ / K. Due to this particularly high specific heat capacity, high heat input caused by temporary load peaks can be absorbed by the coil.
- the fixed connection of the coil to the housing can preferably be produced by an adhesive connection made of adhesive that is thermally relatively highly conductive.
- the adhesive has a thermal conductivity of at least 0.8 W / (m K), in particular at least 1 W / (m K).
- the layer thickness of the adhesive is expediently a maximum of 0.3 mm, in particular less than 0.1 mm. This ensures efficient heat dissipation from the coil into the housing.
- the coil carrier of the coil firmly attached to the housing is made of a thermally relatively highly conductive material with a
- 1 W / (m K) is designed to ensure efficient heat dissipation from the coil into the housing. It is preferred that the inner surface of the housing, which means
- Adhesive connection is connected to the coil and / or the coil carrier, is structured and / or is formed profiled.
- rectangular profiles and / or triangular profiles and / or sinusoidal profiles and / or circular arc profiles as surface structuring in order to ensure efficient heat dissipation from the coil into the housing by means of an increase in the contact surface.
- further profiles / ribs can expediently be applied to the outside of the housing, which ensure an improved heat transfer to the environment.
- the housing has a first cover cap at a first axial end with respect to the coil.
- This can in particular be made of plastic, of a non-magnetically conductive and / or of a non-thermally conductive material or of a thermally conductive material.
- the housing can also have a second cover cap at a second axial end with respect to the coil. This, too, can be made in particular
- Plastic be formed from a non-magnetically conductive and / or from a non-thermally conductive material or from a thermally conductive material.
- a magnetic flux can be wholly or partially held in the housing, which prevents, for example, interference with other components.
- heat emission from the actuator to a contacting element can be prevented or reduced.
- Plastics such as PA6 (polyamide 6), ABS
- a three-part construction of the housing ie with a ring and two cover caps, can be provided.
- a respective cover cap can also be designed to be thermally conductive, for example.
- it can at the same time not be made magnetically conductive. As a result, heat can be released to another element, which prevents the actuator from overheating.
- aluminum or magnesium can be used as a thermally conductive and non-magnetically conductive material.
- the housing preferably has an externally accessible bore with an internal thread or some other externally accessible fastening means.
- a fastening means can, for example, also be designed as a through hole without a thread or in some other suitable manner.
- the housing can for example be rigidly attached to another element than the component of the motor vehicle already mentioned, for example to a body or to a floor of the motor vehicle.
- a reference to another element, in particular a more rigid element can be established so that the component can be excited in an advantageous manner.
- the magnet preferably has a mass which is in a range between 80% of the mass of the other components of the actuator and 120% of the mass of the other components of the actuator. Such values have become
- the housing can preferably be completely or essentially radially symmetrical. This has proven to be a design that is easy to manufacture and use. However, other designs, for example a square, square, rectangular or a design with a different number of corners are also possible.
- the housing can for example be designed to be closed, open or partially open. A closed design can in particular achieve a certain level of protection against the ingress of dust, liquids or other contaminants.
- the magnet preferably has a magnetic central part, a first pole plate and a second pole plate.
- the middle part is preferably surrounded by the first pole plate and the second pole plate.
- the magnetic middle part can in particular be arranged along a single possible direction of movement of the magnet or the spatial direction between the first pole plate and the second pole plate. Such designs have proven to be advantageous.
- the first and / or second pole plates are preferably assigned to the magnet, in particular on two opposite sides, the magnet between the pole plates, particularly preferably in the middle, in the undeflected state of the actuator.
- the outwardly directed surface of an expedient first pole plate i.e. facing away from the magnet, the pole plate being assigned to the magnet, is preferably concave, in particular with regard to its cross section, so that it has a greater thickness at the outer edge than in its center.
- the transition between the thicker, outer edge and the thinner middle part is in particular designed to be linearly sloping or sloping in the shape of a circular arc or sloping in a parabolic manner.
- the pole plate particularly preferably has a collar, in particular of essentially constant thickness, which can have up to 20% of the total extent of the pole plate.
- the surface of the first pole plate which is oriented towards the magnet is expediently designed to be essentially planar.
- a second pole plate is preferably formed on its outwardly directed side like the first pole plate on its outwardly directed surface.
- the second pole plate also faces the magnet
- the first and / or second pole plate are expediently designed with regard to their outwardly directed surface in such a way that they have an im
- first and / or the second pole plate is essentially planar on the side facing the magnet and that the side facing away from the magnet or outer side is concave in terms of its cross section and thus the entire cross section of the pole plate is concave .
- the outer side of the first and / or the second pole plate has a collar, in particular on the circumferential edge, on which the pole plate has a greater thickness or material thickness than in the middle, with the pole plate (s) in the area of the middle of the outer side in particular each has / have a substantially planar plateau.
- the transition between the collar and plateau is particularly preferably designed as a linear transition or a circular arc-shaped or a parabolic transition or a
- the magnet or the magnetic middle part can for example consist of a
- Neodymium alloy or a ferrite alloy Neodymium alloy or a ferrite alloy.
- the invention furthermore preferably relates to a component arrangement for a motor vehicle, the component arrangement at least one component for the
- the actuator is rigidly connected to the component.
- the actuator all of the designs and variants described herein can be used.
- the component arrangement which is preferred and / or according to the invention can be used to simply excite the component with vibrations that generate sound waves possible, so that the component can be used as part of a system for audio playback in the motor vehicle. Compared to a separate
- Loudspeaker which typically requires a separate membrane, is considerably more space-consuming and heavier, is made possible by the loudspeaker according to the invention
- the invention also relates to a motor vehicle which has at least one component arrangement according to the invention.
- a motor vehicle which has at least one component arrangement according to the invention.
- the component arrangement and in particular with regard to the actuator contained therein, all of the designs and variants described herein can be used.
- the advantages already described above can be achieved in this way, in particular the motor vehicle can be compared to designs with conventional
- Speakers have more space and / or a lower weight.
- the invention also relates to the use of an actuator, in particular an actuator according to the invention, in a motor vehicle.
- an actuator in particular an actuator according to the invention, in a motor vehicle.
- the actuator according to the invention all of the embodiments and variants described herein can be used.
- an actuator or vibration exciter which does not itself emit sound, but stimulates existing structures in the vehicle. This excitation causes the structure to vibrate, whereupon it itself emits sound.
- the actuator is typically about a factor of 5 to 10 smaller and a factor of 2 to 5 lighter.
- Actuators, depth actuators or vibration exciters, as described herein, can preferably have the following features, for example, which can be used individually or in combination:
- the coil of the actuator is directly connected to the outer housing, for example glued or otherwise connected, with the magnet is typically internal, for example inside the
- Coil diameter and is typically movably mounted.
- An outer ring as a housing or housing part, to which the coil can be attached can consist of a thermally conductive metal or material, wherein the ring can, for example, close a magnetic flux circuit and can also dissipate the heat of the coil to the outside and on the outer side can give off to the environment.
- the actuator can be installed in a wide variety of positions inside and outside the vehicle. It can preferably be attached to sheet metal structures such as a floor panel, a structural door panel, a trunk lid, a spare wheel recess, a roof structure, a cross member, a fender, a longitudinal member, a front wall or other components of a motor vehicle.
- sheet metal structures such as a floor panel, a structural door panel, a trunk lid, a spare wheel recess, a roof structure, a cross member, a fender, a longitudinal member, a front wall or other components of a motor vehicle.
- the actuator can be positioned in all spatial directions with the same suitability. This can be made possible in particular by centering the magnet system or the magnet on planes that are as far apart from one another as possible.
- the centering and the suspension of the magnet system can be implemented in one component, which can consist of various materials such as plastics, metals or composite materials, whereby the acoustic behavior can be influenced or optimized.
- the actuator can have a central hole that is continuous from top to bottom in order to be able to fasten the actuator in the middle on a bolt.
- the mass of the movable magnet system or core can be
- the actuator can be operated both above and below its own resonance frequency.
- the actuator housing can in principle be designed in various forms, but a symmetrical design can be advantageous for assembly and also for manufacture. Materials can be designed differently, for example.
- the magnet can for example consist of a neodymium alloy or also of a ferrite alloy.
- the housing can be designed to be open or partially open. Apart from the central hole already mentioned, the actuator can also be connected via an external attachment or an adhesive or welded connection. A structure is also conceivable in which the magnet system is not completely within the
- Coil diameter lies, wherein the coil can also be partially enclosed by the magnet.
- FIG. 1 shows an actuator 5 according to an exemplary embodiment of the invention in a side exploded view.
- the actuator 5 has a housing 10.
- the housing 10 is formed by a first cover cap 12, a second cover cap 16 and a ring 14.
- the two cover caps 12, 16 are arranged on the outside and consist of non-thermally conductive, non-magnetically conductive material. It should be mentioned that one or both of these two cover caps 12, 16, for example, are also made thermally conductive, non-magnetically conductive material could exist.
- the ring 14 is made of thermally conductive, magnetically conductive material.
- the actuator 5 has a spring arrangement 20, which by a first
- Spring element 22 and a second spring element 24 is formed. Their implementation will be discussed in more detail below.
- the actuator 5 has a coil which is formed by a coil carrier 32, a first coil section 34 and a second coil section 36.
- the two coil sections 34, 36 are applied to the coil carrier 32. Electric current can flow through the coil sections 34, 36, so that a magnetic field is generated in the coil 30.
- the actuator 5 has a magnet 40. This is formed by a magnetic middle part 42 as well as a first non-magnetic pole plate 44 and a second non-magnetic pole plate 46. The middle part 42 is accommodated between the two pole plates 44, 46.
- Two sets of four screws 18, 19 each are used to fasten the components mentioned.
- fastening by gluing, welding or riveting would also be possible, for example.
- Fig. 2 shows the actuator 5 in a perspective exploded view. It can be seen that the first spring element 22 has a total of four spring arms 26. The second spring element 24 accordingly has a total of four spring arms 28.
- the magnet 40 is designed such that the two pole plates 44, 46 directly adjoin the magnetic middle part 42.
- the magnet 40 is then axially adjacent as a whole from the two
- the magnet 40 is only movable in one axial direction, wherein it is pretensioned by the spring elements 22, 24 into a central rest position.
- the pole plates 44, 46 are designed to be concave on their outwardly directed surface. This enables a particularly space-saving arrangement of the magnet 40 between the spring elements 22, 24 and allows a particularly high magnetic flux density in the edge region of the pole plates.
- the coil 30 surrounds the magnet 40 radially.
- the coil 30 is firmly fixed in the housing 10.
- the magnet 40 can be deflected from its rest position, which causes vibrations.
- a voltage can be applied to which an audio signal is modulated.
- the magnet 40 then vibrates in accordance with this audio signal and generates corresponding vibrations.
- the ring 14 made of magnetically conductive material serves to provide an advantageous magnetic connection.
- a first cylinder-like projection 13, which extends from the first, is used to define the axial direction along which the magnet 40 is movable
- Cover cap 12 extends from inward, and a second cylindrical projection 17 which extends from the second cover cap 16 inward.
- Fig. 3 shows the actuator 5 in the assembled state. It can be seen here that three cylindrical contact points 7 are arranged on the outside of the first cover cap 12. With these, the actuator 5 can be attached to a component of a
- Adjacent motor vehicle Adjacent motor vehicle. Furthermore, a bore 8 is arranged in the center, in which a thread is formed. The actuator 5 can thus be attached to a component.
- the second cover cap 16 is also designed accordingly.
- the bore 8 can also be used to connect the actuator 5 to a rigid component such as a body part of a vehicle and the actuator 5 on the
- the opposite side can be connected to a component that is to be excited to vibrate.
- the stationary component such as a body of the vehicle, can serve as a reference, relative to which the vibrations are excited.
- FIG. 4 shows an alternative embodiment of a spring element, here by way of example the first spring element 22. This can be used in the context of the embodiment described with reference to FIGS. 1 to 3 instead of the first spring element 22 shown there and / or instead of the second spring element 24 shown there will.
- the spring arms 26 of the spring element 22 shown in FIG. 4 are designed in a spiral shape. A different spring characteristic can thus be achieved.
- Fig. 5 shows schematically an exemplary pole plate 44, 46 in cross section.
- the pole plate is, for example, designed to be essentially flat 61 on the side facing the magnet (not shown).
- the outer side or surface 62 facing away from the magnet is concave and thus the whole
- the outer side has a collar 63 on the circumferential edge, on which the pole plate has a greater thickness or
- the pole plate having an essentially planar plateau 64 in the area of the center of the outer side.
- the transition 65 between collar 63 and plateau 64 can be designed in various ways; a linear transition, a circular arc-shaped and a parabolic transition are illustrated on the left-hand side.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Multimedia (AREA)
- Mechanical Engineering (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019205278 | 2019-04-11 | ||
PCT/EP2020/060215 WO2020208168A1 (en) | 2019-04-11 | 2020-04-09 | Vibration actuator for rigid structures for high-performance bass playback in automobiles |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3954133A1 true EP3954133A1 (en) | 2022-02-16 |
EP3954133B1 EP3954133B1 (en) | 2024-02-21 |
Family
ID=70277407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20718308.8A Active EP3954133B1 (en) | 2019-04-11 | 2020-04-09 | Vibration actuator for rigid structures for high-performance bass playback in automobiles |
Country Status (7)
Country | Link |
---|---|
US (1) | US11943599B2 (en) |
EP (1) | EP3954133B1 (en) |
JP (1) | JP7291246B2 (en) |
KR (1) | KR20220002881A (en) |
CN (1) | CN113841423A (en) |
DE (1) | DE102020204617A1 (en) |
WO (1) | WO2020208168A1 (en) |
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-
2020
- 2020-04-09 US US17/602,036 patent/US11943599B2/en active Active
- 2020-04-09 JP JP2021560434A patent/JP7291246B2/en active Active
- 2020-04-09 EP EP20718308.8A patent/EP3954133B1/en active Active
- 2020-04-09 WO PCT/EP2020/060215 patent/WO2020208168A1/en unknown
- 2020-04-09 KR KR1020217032179A patent/KR20220002881A/en not_active Application Discontinuation
- 2020-04-09 CN CN202080027668.9A patent/CN113841423A/en active Pending
- 2020-04-09 DE DE102020204617.4A patent/DE102020204617A1/en active Pending
Also Published As
Publication number | Publication date |
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CN113841423A (en) | 2021-12-24 |
JP7291246B2 (en) | 2023-06-14 |
US20220150642A1 (en) | 2022-05-12 |
WO2020208168A1 (en) | 2020-10-15 |
KR20220002881A (en) | 2022-01-07 |
DE102020204617A1 (en) | 2020-10-15 |
JP2022528758A (en) | 2022-06-15 |
US11943599B2 (en) | 2024-03-26 |
EP3954133B1 (en) | 2024-02-21 |
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