CN219210550U - Actuator assembly - Google Patents

Abstract

The utility model relates to an actuator assembly, wherein the actuator comprises an electrical drive for converting an electrical signal into mechanical force and/or mechanical deflection, wherein the drive has at least one coil through which an electrical current of the electrical signal can flow, and at least one magnet which can interact electromagnetically with the coil, wherein the actuator is designed for exciting a body, in particular a planar body, which can be connected to the actuator, to generate vibrations, thereby enabling the body to radiate audible sound, characterized in that the actuator is mechanically connected to the body by means of at least one elastic coupling element.

Description

Actuator assembly

Technical Field

The present utility model relates to an actuator assembly.

Background

Fig. 1 shows an exemplary actuator assembly according to the prior art. The vibrating mass 1 (for example, constituted by at least one magnet and a plurality of polar plates) is coupled to the fixed mass 2 by elastic means 3. The elastic means 3 describes an exemplary elastic suspension (e.g. leaf springs, elastic bodies … …). The fixed mass 2 comprises, for example, a housing, a plug coupling or a coil. The vibrating mass 1, the fixed mass 2 and the elastic means 3 are components of an electric exciter and are therefore located within its system limits 6. The electrodynamic vibration exciter is coupled to the acoustic radiating structure by means of a substantially rigid coupling 5 through a fixed mass 2.

Disclosure of Invention

The object of the utility model is to propose an actuator assembly which is optimized in respect of acoustic radiation of at least one defined frequency band and/or which is designed to emphasize this, and/or which is designed to be cost-effective and/or relatively simple to manufacture and/or to function relatively accurately and/or to be relatively robust.

According to the utility model, this object is achieved by an actuator assembly, comprising:

an actuator assembly, wherein the actuator assembly comprises an actuator, wherein the actuator comprises an electric drive for converting an electric signal into mechanical force and/or mechanical deflection, wherein the electric drive has at least one coil through which an electric current of the electric signal can flow, and at least one magnet which can be in electromagnetic interaction with the coil, wherein the actuator is designed for exciting a body connectable with the actuator for generating vibrations, thereby enabling the body to radiate audible sound, wherein the actuator is mechanically connected with the body by means of at least one elastic coupling element.

The actuator is preferably understood as an electric exciter and preferably the same can be understood as the opposite.

The actuator assembly has at least one coupling element, preferably two or more coupling elements, which are preferably arranged in parallel and/or in series with respect to the mechanical coupling of the coil to the body. In particular, the actuator assembly preferably has at least two coupling elements arranged in parallel, which are designed in particular as spring elements, in terms of the mechanical coupling of the coil to the body.

The actuator and the body are preferably designed such that the body radiates an audible sound when the magnet vibrates and/or when a relative vibration is generated between the magnet and the coil. The actuator and the body are designed in particular here to: under excitation of an electrical current flowing through the at least one coil and having an electrical signal of music information and/or speech information, acoustic radiation is caused by means of the body, the acoustic radiation comprising an audibly audible and discernable music signal and/or speech signal. Conveniently, the actuator assembly is designed as an electro-acoustic conversion assembly.

Preferably, the vibration system, which is constituted at least by the actuator, the elastic coupling element and the body, is designed and arranged such that at least one specific frequency range of the vibrations of the body is enhanced in terms of the vibrations of the body and/or amplified in terms of the amplitude of the vibrations, in particular in terms of the acoustically perceptible frequency band and/or in the frequency range substantially between 80Hz and 200Hz or substantially between 10kHz and 20 kHz.

The coupling elastic means of the coupling element, which are at least dependent on the material and geometry of the coupling element, preferably have a value of between 0.005mm/kN and 20mm/kN, in particular a value of between 0.02mm/kN and 20mm/kN or a value of between 0.005mm/kN and 0.1 mm/kN.

The actuator preferably has a housing. Conveniently, the housing and/or coil is mechanically connected/mechanically coupled directly or indirectly to the resilient coupling element.

Preferably, the coupling element is designed and arranged such that a mechanical coupling and/or a mechanical connection is established directly or indirectly between the coil and the housing.

Preferably, the coupling element (in particular as a bendable structure and/or bendable geometry in relation to the coupling region of the housing) is integrated into the housing, wherein the coupling region is directly or indirectly connected to the body. Expediently, the housing has a rotationally symmetrical housing part which is designed to be elastic with respect to the at least one coupling region, which particularly preferably has at least one rib and/or one or more stiffening geometries.

The housing is preferably formed from aluminum or from plastic, in particular from ABS plastic or PC-ABS plastic or PBT plastic, or from other plastics, for example PP, PU, PVC, PA or PBT.

Preferably, the coupling element is designed as a spring element, in particular as at least two spring elements. In particular, the two spring elements are each connected directly or indirectly to a cover plate of the coil carrier or to the coil carrier, in particular preferably integrally. The at least one spring element is conveniently formed from aluminium or spring steel. The at least one spring element is in particular designed as a leaf spring.

The vibration system advantageously has at least one damping layer and/or damping element which is connected in particular directly or indirectly to the housing and/or the coupling element and advantageously reduces the extent of the vibration resonance of the vibration system.

Preferably, the elastic coupling element is designed to be reinforced, in particular with at least one rib or at least one other type of reinforcement structure.

Preferably, the elastic coupling element is designed as a silicon film. Alternatively, it is preferred that the elastic coupling element is formed as an asphalt layer/film, and/or an elastomer layer/elastomer film, and/or a layer/film made of pressed fibers, and/or is formed of rubber, or that the elastic coupling element is substantially formed of cardboard/paper or is formed of foam or foamed plastic. Conveniently, the coupling element or the additional coupling element comprises a body made of wood, in particular designed to be curved. It is particularly preferred that the actuator assembly has a first coupling element (as an elastic layer/elastic membrane) and a second coupling element (made of wood or the body is made of wood) connected to the first coupling element.

Conveniently, the body is designed as a trim piece of the interior space of the motor vehicle, and the actuator is arranged on that side of the trim piece which faces away from the interior space.

Preferably, the body is designed as an exterior trim part or as a part of the vehicle chassis.

The at least one coil is preferably arranged in the gap between two magnets or in the gap between the pole plates or in the magnetic path of the magnets.

The coil being arranged in the interspace is preferably understood to mean that the coil is arranged completely or partially in the interspace in the rest state. The actuator can in particular be designed such that the coil protrudes from the recess in the rest state, particularly preferably on opposite sides.

The actuator preferably has at least two pole plates, which in particular delimit a recess in which the at least one coil is arranged.

The actuator is preferably designed such that the void is formed substantially linearly.

A linear gap is preferably understood to mean a gap along a plane which in particular has substantially equal gap lengths in all positions, wherein the gap lengths are oriented perpendicularly to the plane and the two magnets, in particular in combination with their pole plates and the gap surfaces of the pole plates forming the gap (in particular the surfaces adjoining the gap), are oriented particularly preferably substantially parallel to the plane along the gap.

The gap length is conveniently defined by the spacing between the magnets and/or by the spacing between the plates relative to each other, respectively associated with the two magnets.

Preferably, the actuator is designed to be mirror symmetrical with respect to a plane along the interspace, in particular irrespective of the magnetization of the magnet.

The plane along the interspace is preferably understood as a mirror plane and can be understood in reverse, rather, these terms are especially interchangeable.

The magnet is accordingly preferably designed as a permanent magnet or alternatively preferably as an electromagnet.

The vertical direction of the gap is preferably defined to be substantially parallel to the deflection direction of the coil in the gap.

The term "body" or "planar body" is preferably understood as a body which is capable of vibrating in an acoustically usable manner and/or whose contour is substantially constituted by an outer side (i.e. which body is in particular not formed solid or compact), and/or as a shell-like body and/or a thickness of which shell-like body, in particular of its outer side, is 2cm or less, conveniently 0.6cm or less, wherein the limitation of the thickness is in particular preferably at least 95% of its outer surface and/or outer side.

The actuator is preferably designed to: in the vertical direction of the recess, pole plates are arranged above and below each magnet, particularly preferably on the poles of the magnet, which in particular respectively have a maximum thickness at the recess and are designed to taper away from the recess. Particularly preferably, the design of the pole plate is continuously narrowed, and the pole plate is designed flat here.

Preferably, at least one, in particular all, of the pole plates is designed as: on the outer surface of the pole plate facing away from the magnet (i.e. the outer surface arranged opposite the connection or abutment surface of the magnet), there is at least one flat sub-surface and/or plateau, respectively. The sub-surface/plateau is formed here in particular substantially perpendicularly to the plane along the interspace, to be precise two planes perpendicular to the plane along the interspace substantially span the plane of the sub-surface/plateau.

Preferably, the coil is designed to be substantially rectangular and/or substantially rectangular with rounded corners. The coil is designed in particular to have a width which is at least twice the height, the height being defined in the vertical direction of the recess and the width being defined substantially perpendicular to the recess length and perpendicular to the vertical direction of the recess.

Conveniently, the coil comprises a coil carrier formed of a non-ferromagnetic material.

Preferably, the coil carrier has a core which is arranged inside the coil, wherein the coil carrier has a cover beam above and below the coil, in particular with respect to the vertical direction of the interspace, and cover plates connected to the cover beams, respectively, which are oriented substantially parallel to the plane along the interspace and are arranged on both sides of the coil, respectively, such that the cover beams and the cover plates enclose the coil in a continuous manner. Particularly preferably, the cover beam is designed to be correspondingly at least as wide as the coil.

Conveniently, the actuator has as elastic coupling element one or two or more spring elements which are mechanically connected with one or respectively two cover plates or beams and (in particular respectively) additionally mechanically connected with the body or housing.

Preferably, the actuator has a spring assembly (in particular also referred to as a bending spring) which is designed to pretension the coil into the rest position, wherein the spring assembly is designed to pretension the coil into the rest position in a manner that is resettable in each possible direction of movement.

Conveniently, the spring assembly has at least one spring unit, which is arranged above the magnet and in particular the pole plate in terms of the vertical direction of the interspace, and at least one spring unit is arranged below the magnet and in particular the pole plate in terms of the vertical direction of the interspace.

Preferably, the actuator with the connected body is designed as a bending wave emitter and/or is designed such that the actuator excites/can excite the (in particular planar) body to vibrate its body structure, thereby causing the body surrounded by air to emit sound waves.

Preferably, the actuator has at least one connecting element which secures and/or fixedly connects the two magnets and/or all pole plates together, in particular the actuator has two connecting elements (on opposite sides of the actuator) which secure and/or fixedly connect the two magnets and/or all pole plates together, respectively. Particularly preferably, the connecting element/s are formed from a non-ferromagnetic material, in particular from plastic or aluminum or copper.

Preferably, the coil is arranged substantially centrally and/or centrally in the interspace in the rest state.

Preferably, the surfaces of the pole plates respectively oriented towards the magnets are designed to be substantially flat.

The actuator is expediently designed such that the at least one coil and the housing are supported or fastened or arranged/positioned substantially fixedly/rigidly/substantially immovably and the at least one magnet is suspended movably and designed in the interspace and can be excited or excited to vibrate.

Preferably, the at least one coil is integrated into the housing of the actuator.

Drawings

In the schematic:

FIG. 1 illustrates an exemplary actuator assembly according to the prior art; and

fig. 2-7 illustrate an embodiment of an actuator assembly or actuator.

Detailed Description

List of reference numerals

1. Vibrating mass

2. Fixed mass body

3. Elastic device

4. Acoustic radiating structure

5. Rigid coupling

6. System limit of electric vibration exciter

7. Elastic coupling element

8. System limit for an electric exciter comprising an elastic coupling element

9. System limit for an electric exciter without elastic coupling element

10. Power spectrum for electric vibration exciter with rigid connection

11. Power spectrum for electric vibration exciter with elastic coupling element

12. Power spectrum of electric vibration exciter with elastic connecting element designed for bass

13. Coupled resonance of elastic coupling element

14. Basic resonance of electric vibration exciter

15. When the frequency is higher than the coupling resonance, the force excitation is reduced

16. Electromagnetic excitation force between vibrating mass and fixed mass

17. Undeflected state of fixed mass

18. Deflection state of fixed mass body

19. Housing part for fastening a mass body

20. Coil part for fixing mass body

21. Coil carrier part for fixing mass body

22. And vibrating the slit.

Fig. 2 shows a schematic equivalent mechanical circuit diagram of an exemplary electric exciter or actuator with an elastic coupling element 7. Unlike the illustration of fig. 1, an elastic coupling element 7 is mounted between the fixed mass 2 and the sound radiating structure 4, whereby additional mechanical resonance can be generated. The elastic coupling element 7 can be integrated, for example, in an electric exciter (see, for example, the system limit 8 of an electric exciter comprising an elastic coupling element) or be arranged as an additional element between the fixed mass body 2 and the sound radiation structure 4 (see, for example, the system limit 9 of an electric exciter not comprising an elastic coupling element).

Fig. 3 shows examples of a power spectrum 10 for an electrical exciter (or actuator) with a rigid coupling, a power spectrum 11 for an electrical exciter (or actuator) with an elastic coupling element, and a power spectrum 12 for an electrical exciter with an elastic coupling element for a bass design. Unlike an exemplary electrodynamic exciter without elastic coupling elements, an additional high-frequency coupled resonance is generated in the exemplary electrodynamic exciter with elastic coupling elements, which enhances the excitation of high-frequency sound. Below the coupling resonance 13 of the elastic coupling element, the force-excited behaviour remains substantially unchanged, and thus the excitation behaviour in the base resonance 14 of the electrodynamic exciter remains unchanged. In the case of the power spectrum 12, which is provided for bass frequencies and is shown for example in an alternative manner, of an electrodynamic exciter with elastic coupling elements, at the top of the frequency range to be excited, coupling resonances can likewise be produced by the elastic coupling elements, which do not have to be in the high-frequency range. When the frequency is higher than the coupling resonance, the force excitation decreases 15 (the excitation force amplitude decreases continuously). A coupled resonance is accordingly understood according to an example as a specific frequency range of the vibration of the body, which frequency range is enhanced and/or amplified in terms of the amplitude of the vibration.

Fig. 4 shows an exemplary embodiment of an electric exciter or actuator with an elastic coupling element 7, which is located outside the system limit 9 of an electric exciter (or actuator) that does not contain an elastic coupling element. The exemplary electrodynamic vibration exciter is essentially composed of a vibrating mass 1 (or magnet), an elastic means 3 (or a spring element for suspending the magnet and a fixed mass 2 (here designed as a housing with integrated coils), wherein an electromagnetic excitation force 16 between the vibrating mass 1 and the fixed mass 2 is generated by means of an electrical excitation between the vibrating mass and the fixed mass 2 and causes a vibration of the magnet. Between the fixed mass 2 or housing of the actuator and the acoustic radiating structure 4 or planar body there is an elastic coupling element 7 which is not integrated into the electric vibration exciter or actuator, which can be designed appropriately to produce a coupling resonance 13 of the elastic coupling element. The actuator constitutes an actuator assembly according to an example by being connected to the body by means of an elastic coupling element 7.

Fig. 5 shows an exemplary embodiment of an electric exciter or actuator with an elastic coupling element 7 which is located within the system boundary 8 of the electric exciter comprising the elastic coupling element and is fully integrated into the fixed mass body 2 or housing with the coil integrated according to the example. The exemplary electrodynamic vibration exciter is essentially composed of a magnet (as a vibrating mass 1), an elastic means 3 (designed as a spring element between the magnet and the housing of the actuator) and a fixed mass 2 (as a housing), wherein an electromagnetic excitation force 16 between the vibrating mass 1 and the fixed mass is generated by means of an electrical excitation between the vibrating mass 1 and the fixed mass 2 and excites the vibrating mass 1 or the magnet to vibrate. The housing 2 is exemplary embodied such that the elastic coupling element 7 is integrated into the housing. The coupled resonance 13 of the elastic coupling element can be influenced by a suitable choice of the geometry and stiffness of the housing. In contrast to the undeflected state 17 of the fixed mass, the fixed mass 2, when excited mainly at the frequency of the coupling resonance, dynamically transitions into the deflected state 18 of the fixed mass, so that the housing as the fixed mass 2 is deformed in the deflected state.

Fig. 6 shows an exemplary embodiment of an electric exciter or actuator with an elastic coupling element 7, which is located within the system limits 8 of the electric exciter comprising the elastic coupling element, but is mounted as an additional component to the housing of the actuator as a fixed mass 2, for example as an elastic aluminum cap screwed to the housing. An exemplary electrodynamic vibration exciter or actuator is generally composed of a magnet (as a vibrating mass 1), an elastic means 3 (designed as a spring element between the magnet and the housing) and a housing with an integrated coil (as a fixed mass 2), wherein an electromagnetic excitation force 16 between the vibrating mass 1 and the fixed mass 2 is generated by means of an electrical excitation between the vibrating mass and the fixed mass and the magnet can be excited or excited to generate vibrations. The elastic coupling element 7 is connected on one side to a housing as a fixed mass body 2 and on the other side to an acoustic radiating structure or body or planar body. By appropriately selecting the geometry and stiffness of the elastic coupling element 7 or designing it as a housing cover, the coupled resonance can be influenced. In contrast to the undeflected state 17 of the fixed mass (shown in dotted form), the fixed mass 2, when excited predominantly at the frequency of the coupling resonance, dynamically transitions into a deflected state in which the elastic coupling element 7 is shown.

Fig. 7 shows an exemplary embodiment of an electric exciter or actuator with an elastic coupling element 7, which is located within the system limit 8 of the electric exciter comprising the elastic coupling element and is formed by the part of the fixed mass 2 that is in the force flow. According to an example, the elastic coupling element 7 is designed as two spring elements, which are each connected to a housing part 19 of the fixed mass, which is rigidly connected to the main body, wherein the two elastic coupling elements 7 are each also connected to a coil carrier 21 of the fixed mass. The exemplary electrodynamic vibration exciter is substantially composed of a vibrating mass 1, which is designed as two magnets in an exemplary manner, which is suspended elastically around a coil part 20 of a fixed mass designed as a coil and around a coil carrier part 21 of the fixed mass by means of an elastic means 3, which is designed as a spring element for establishing a coupling between the coil/coil carrier and the two magnets. A gap is formed between the two magnets and the coil carrier of the coil, respectively. An electromagnetic excitation force 16 between the vibrating mass and the fixed mass is generated by means of an electrical excitation between the vibrating mass 1 and the fixed mass 2 and its excitation magnet generates vibrations.

In the exemplary case illustrated, in other words, the elastic coupling element 7 is integrated in the coil carrier part 21 of the fixed mass. Above the vibration gap 22, the coil carrier part 21, which holds the mass, forms a leaf spring-like spring arrangement, which together form the spring coupling element 7. By a suitable choice of the geometry and stiffness of the coil carrier part 21 of the fixed mass and the geometry of the vibration slit 22, coupled resonances can be generated or influenced. In contrast to the undeflected state 17 of the fixed mass, the fixed mass 2 dynamically transitions to the deflected state 18 of the fixed mass mainly when excited at the frequency of the coupled resonance.

Claims (22)

1. An actuator assembly, wherein the actuator comprises an electric drive for converting an electric signal into mechanical force and/or mechanical deflection, wherein the electric drive has at least one coil through which an electric current of the electric signal can flow, and at least one magnet which can be in electromagnetic interaction with the coil, wherein the actuator is designed for exciting a body which can be connected with the actuator for generating vibrations, thereby enabling the body to radiate audible sound,

it is characterized in that the method comprises the steps of,

the actuator is mechanically connected to the body by means of at least one resilient coupling element.

2. The actuator assembly of claim 1 wherein the actuator assembly comprises a plurality of actuator arms,

the vibration system, which is formed at least by the actuator, the elastic coupling element and the body, is designed and arranged such that at least one specific frequency range of the vibrations of the body is enhanced in terms of the vibrations of the body and/or amplified in terms of the amplitude of the vibrations.

3. An actuator assembly according to claim 1 or 2, wherein,

the coupling elastic means of the elastic coupling element, at least in relation to the material and geometry of the elastic coupling element, have a value between 0.005mm/kN and 20 mm/kN.

4. An actuator assembly according to claim 1 or 2, wherein,

the actuator has a housing, the housing and/or the coil being mechanically connected directly or indirectly to the elastic coupling element.

5. The actuator assembly of claim 4 wherein the actuator assembly comprises a plurality of actuator arms,

the elastic coupling element is designed and arranged such that a mechanical connection is established directly or indirectly between the coil and the housing.

6. The actuator assembly of claim 4 wherein the actuator assembly comprises a plurality of actuator arms,

the elastic coupling element is integrated into the housing as a bendable structure and/or bendable geometry with respect to a coupling region of the housing, wherein the coupling region is directly or indirectly connected with the body.

7. An actuator assembly according to claim 1 or 2, wherein,

the elastic coupling element is designed as a spring element or as at least two spring elements.

8. The actuator assembly of claim 2 wherein the actuator assembly comprises a plurality of actuator arms,

the vibration system has at least one damping layer and/or damping element.

9. An actuator assembly according to claim 1 or 2, wherein,

the elastic coupling element is designed to be reinforced.

10. An actuator assembly according to claim 1 or 2, wherein,

the elastic coupling element is designed as a silicon film.

11. An actuator assembly according to claim 1 or 2, wherein,

the resilient coupling element or the additional resilient coupling element comprises a body made of wood.

12. An actuator assembly according to claim 1 or 2, wherein,

the body is designed as a trim part of an interior space of a motor vehicle, and the actuator is arranged on a side of the trim part facing away from the interior space.

13. An actuator assembly according to claim 1 or 2, wherein,

the body is designed as an exterior trim part or as a part of the vehicle chassis.

14. The actuator assembly of claim 1 wherein the actuator assembly comprises a plurality of actuator arms,

the body is a planar body.

15. The actuator assembly of claim 2 wherein the actuator assembly comprises a plurality of actuator arms,

the at least one particular frequency range is an acoustically perceptible frequency band.

16. The actuator assembly of claim 2 wherein the actuator assembly comprises a plurality of actuator arms,

the at least one specific frequency range is a frequency range between 80Hz and 200 Hz.

17. The actuator assembly of claim 2 wherein the actuator assembly comprises a plurality of actuator arms,

the at least one specific frequency range is a frequency range between 10kHz and 20 kHz.

18. The actuator assembly of claim 3 wherein the actuator assembly comprises a plurality of actuator arms,

the value is between 0.02mm/kN and 20 mm/kN.

19. The actuator assembly of claim 3 wherein the actuator assembly comprises a plurality of actuator arms,

the value is between 0.005mm/kN and 0.1 mm/kN.

20. The actuator assembly of claim 8 wherein the actuator assembly comprises a plurality of actuator arms,

the actuator has a housing, and the damping layer and/or the damping element are directly or indirectly connected to the housing and/or the elastic coupling element, which damping layer and/or damping element reduces the extent of the vibration resonance of the vibration system.

21. The actuator assembly of claim 9 wherein the actuator assembly comprises a plurality of actuator arms,

the resilient coupling element has at least one rib.

22. The actuator assembly of claim 11 wherein the actuator assembly comprises a plurality of actuator arms,

the elastic coupling element or the additional elastic coupling element is designed to be curved.

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