DE102019210296B4 - Device for generating sound and its manufacture and use - Google Patents

Abstract

A device for generating sound (10) for providing sound to an interior of a vehicle (40), the device (10) comprising: an electrical actuator (30) and a membrane (20), the membrane (20) being composed of at least part of an interior lining (25) of the vehicle (40) or at least part of the interior trim (25) of the vehicle (40) and the membrane (20) is connected to the electrical actuator (30) in a non-positive, positive and / or cohesive manner, the membrane (20 ) consists of a part of the inner lining (25), the membrane (20) being directly connected to the electrical actuator (30) in a non-positive, positive and / or material fit and the electrical actuator (30) in a recess of a vehicle part (45 ), designed as a carrier, with such a carrier structure being recessed and / or deep-drawn in the area of the actuator (30) so that there is no contact between the actuator (30) and the carrier structure (45), characterized in that the vehicle Part (45) is designed as a carrier in a vehicle door, the electrical actuator (30) having an inertia element (31).

Description

Field of invention

The invention relates to a device for generating sound, in particular for providing sound to an interior of a vehicle. The invention also relates to a production method and a use.

background

In many cases, devices for generating sound, in particular loudspeakers, are arranged in vehicles. In this case, at least some devices for generating sound can require a large amount of space and thus, in at least some cases with other components of the vehicle, lead to a cramped installation situation. Examples of these other components can be, for example, movable windows, window regulators, storage compartments, electronic components or other ancillary units, etc.

Pamphlet DE 69 601 726 T2 discloses a device for generating sound for sounding an interior of a vehicle, the device having an electrical actuator and a membrane, the membrane being connected to the electrical actuator in a non-positive, positive and / or cohesive manner.

EP 0 054 945 A1 proposes a loudspeaker for an automobile with an audio system, the loudspeaker having a vibrating membrane which is arranged between an output for exciting the membrane to vibrate and a part of the automobile.

DE 103 58 643 A1 discloses an inner lining which is connected directly to an actuator and is excited by this to vibrate.

description

It is the object of the invention to provide a modified device for generating sound.

This object is achieved by the subject matter of the independent claims. Further developments of the invention emerge from the subclaims and the following description.

According to a first aspect, a device for generating sound for sounding an interior of a vehicle has an electrical actuator and a membrane. The membrane consists of at least part of the interior trim of the vehicle or has at least part of an interior trim of the vehicle. Furthermore, the membrane is connected to the electrical actuator in a non-positive, positive and / or cohesive manner.

A device for generating sound converts electrical signals into sound waves. The vehicle is, for example, a motor vehicle, such as a car, bus, truck or motorcycle, or else a rail vehicle, a ship or an aircraft. An interior of a vehicle is set up to arrange passengers. The interior can be closed, such as in a limousine, the interior can be open, such as in a convertible or motorcycle.

An electrical actuator converts electrical signals into motion, e.g. into motion along a central axis of the actuator. For this purpose, the actuator can, for example, use an electrodynamic, permanent dynamic, electrostatic and / or piezoelectric principle.

A membrane is a flat structure that distributes a movement, e.g. along a normal to the membrane, over at least a large part of the surface of the membrane. Depending on the design and frequency, the membrane can move in a piston or wave shape, for example. The membrane can be straight, curved, corrugated and / or have another shape. The membrane can have one or more layers or plies. The membrane consists of at least part of the interior trim of the vehicle or has at least part of the interior trim of the vehicle. The interior trim of the vehicle is at least partially visible in the interior or from the interior of the vehicle. The interior trim can, for example, have a dashboard, a vehicle pillar (e.g. an A-pillar), a door trim, and / or others. The surface visible to the interior can have e.g. leather, synthetic leather, Alcantara, fabric, plastic, wood, metal such as aluminum and / or other materials. When the device for generating sound is supplied with energy, at least a part of the visible inner lining can move. The membrane is non-positively, positively and / or cohesively connected to the electrical actuator. The membrane can, for example, be glued, welded, soldered, clamped and / or screwed to the electrical actuator.

By means of this device it is possible to also arrange a sound transducer in at least some narrow and / or difficult to access places, for example in a vehicle. For at least some of the devices, the “problem of the infinite baffle” (prevention of acoustic short-circuits) can be solved by acoustic separation of the front and back of the interior cladding. The membrane can also be designed to be quite robust so that it can be more robust against damage, for example by liquid - such as with a paper membrane.

In some embodiments, the membrane furthermore has a stiff and / or stiffening intermediate layer, the stiff and / or stiffening intermediate layer being arranged between the electrical actuator and the inner lining. The stiff and / or stiffening intermediate layer is also part of the membrane. The stiff and / or stiffening intermediate layer can also be connected to the electrical actuator and / or the inner lining in a non-positive, positive or material fit. In this way, for example, the frequency response of the device and / or its efficiency can be improved.

In some embodiments, the membrane comprises polypropylene (PP), acrylonitrile-butadiene-styrene copolymers (ABS), other plastics, fabrics made of carbon fiber or glass fiber, natural fiber materials such as hemp, flax, sisal, cotton and / or other fabrics, jute, leather, Synthetic leather, Alcantara, wood, metal such as aluminum or steel, and / or other materials and / or a combination of these materials or consists of these materials. The membrane can in particular consist of or have soft materials. A processing of the mentioned materials can combine several of these materials to form a composite material and / or provide for impregnation with different resins such as epoxy resin or phenolic resin, as well as pressing the materials or composites with different strengths over the surface. The use of these materials has resulted in very good acoustic quality in experiments.

In some embodiments, the membrane furthermore has a resilient intermediate layer, the resilient intermediate layer being arranged between the electrical actuator and the inner lining. The resilient intermediate layer can, for example, be made of foam or felt material or have these materials. The resilient intermediate layer can - in addition to or instead of the rigid intermediate layer - be part of the membrane. This resilient intermediate layer can improve the acoustic quality in some frequency ranges. For certain arrangements of the device, this can contribute to increasing the robustness.

In some embodiments, the electrical actuator is based on an electrodynamic, permanent dynamic and / or piezoelectric principle.

In one embodiment, the electrical actuator has an inertia element. The inertia element is coupled to the actuator and / or part of the actuator. In this way, the acoustic quality and / or the efficiency can be further improved for certain frequency ranges.

In one embodiment, the electrical actuator is arranged in a cutout in a vehicle part. The vehicle part can for example be a carrier, e.g. in a vehicle door. Such a carrier structure can be recessed and / or deep-drawn in the area of the actuator so that there is no contact between the actuator and the carrier structure. The device for generating sound is thus decoupled from other vehicle parts.

In one embodiment, the device furthermore has a connecting element, the connecting element being set up to establish a mechanical connection to another part of the vehicle. The connecting element can have an elastic region and / or a damper, for example in order to further improve the acoustic quality and / or the efficiency for certain frequency ranges.

In some embodiments, the actuator is located, from the interior of the vehicle, behind the interior trim. The actuator is not visible in the interior of the vehicle, i.e. it is located behind the interior trim, for example. This is particularly advantageous when it is desired to hide the devices.

In some embodiments, the actuator, from the interior of the vehicle, is located in front of the interior trim. The actuator is visible in the interior of the vehicle, i.e. arranged in front of the interior trim, for example. This is particularly advantageous when visibility of the devices is desired.

In some embodiments, the device is set up to implement broadband sound radiation in the entire audible range, in particular between 20 Hz and 20 kHz. However, tweeters or woofers, for example, can also be formed.

• - Bereitstellen eines elektrischen Aktuators; und
• - Anordnen einer Membran auf dem Aktuator, wobei die Membran aus einem Teil der Innenverkleidung besteht oder zumindest einen Teil einer Innenverkleidung eines Fahrzeugs aufweist und wobei das Anordnen der Membran mit dem elektrischen Aktuator eine kraft-, form- und/oder stoffschlüssige Verbindung umfasst.

Another aspect relates to a method for producing a device for generating sound. The procedure consists of the following steps:

• - Provision of an electrical actuator; and
• Arranging a membrane on the actuator, wherein the membrane consists of a part of the inner lining or at least has a part of an inner lining of a vehicle, and the arranging of the membrane with the electrical actuator comprises a force-fit, form-fit and / or material connection.

Another aspect relates to the use of a device for generating sound, as described above and / or below, for providing sound to an interior of a vehicle.

For further clarification, the invention is described with reference to the embodiments shown in the figures. These embodiments are only to be understood as an example and not as a restriction.

Figure list

• 1 shows schematically a vehicle with a device according to an embodiment;
• 2 shows schematically a device according to an embodiment;
• 3 shows schematically a device according to a further embodiment;
• 4th shows schematically a manufacturing method according to an embodiment.

Detailed description of embodiments

1 shows schematically a vehicle 40 with a device 10 for generating sound according to one embodiment. Embodiments of the device 10 are in an A-pillar 41 , in a C-pillar 42 and in a vehicle door 43 arranged. The devices 10 can have a similar frequency range and / or, if necessary, depending on the location of the attachment, narrowband, e.g. be designed as a tweeter or woofer.

2 shows schematically an apparatus 10 for generating sound according to one embodiment. For a clearer representation, some elements are shown significantly larger or smaller in relation to each other. The device 10 has an electric actuator 30th on. The actuator 30th can for example be based on an electrodynamic, permanent dynamic and / or piezoelectric principle. Furthermore, the device 10 a membrane 20th at least one part of an interior lining 25th of the vehicle 40 consists or at least part of the interior trim 25th of the vehicle 40 having. The interior lining 25th can, as shown in dotted lines, extend over the membrane 20th continue beyond. The interior lining 25th can, outside the membrane 20th , with a vehicle part 45 be connected. The membrane 20th can with the electric actuator 30th be connected directly or via intermediate layers non-positively, positively and / or cohesively. It can be between the electrical actuator 30th and the interior trim 25th a stiff and / or stiffening intermediate layer 27 and / or a resilient intermediate layer 26th be arranged. The device 10 may be optional and / or dependent on the frequency range of the device 10 an element of inertia 31 exhibit. The actuator 30th is in the embodiment shown by a recess 47 of the vehicle part 45 guided or partially in the area of the recess 47 arranged.

3 shows schematically an apparatus 10 for generating sound according to a further embodiment. Here is the interior lining 25th shown arched. on the interior trim 25th is a stiff and / or stiffening intermediate layer 27 and / or a resilient intermediate layer 26th arranged. On one of these liners 26th , 27 is an actuator 30th arranged or connected to the intermediate layer in a non-positive, positive and / or cohesive manner. It also becomes clear how, for example, the actuator 30th in the area of the recess 47 of a vehicle part 45 can be arranged.

4th shows schematically a flow chart 50 of a manufacturing method according to an embodiment. In one step 51 becomes an electric actuator 30th provided. In one step 52 becomes a membrane 20th on the actuator 30th arranged, the membrane 20th from a part of the interior lining 25th consists or at least part of an interior lining 25th of a vehicle and wherein the arranging the membrane ( 20th ) with the electric actuator ( 30th ) comprises a non-positive, positive and / or material connection.

List of reference symbols

10

Device for generating sound

20th

membrane

25th

interior panelling

26th

resilient intermediate layer

27

rigid liner

30th

electric actuator

31

Element of inertia

38

Connecting element

40

vehicle

41

A-pillar

42

C-pillar

43

Vehicle door

45

Vehicle part

47

Recess

50

flow chart

51, 52

step

Claims (8)

Device for generating sound (10) for sounding an interior of a vehicle (40), the device (10) having: an electrical actuator (30) and a membrane (20), wherein the membrane (20) consists of at least part of an interior lining (25) of the vehicle (40) or at least part of the interior lining (25) of the vehicle (40) and the membrane (20) is connected to the electrical actuator (30) in a non-positive, positive and / or cohesive manner, the membrane (20) consists of a part of the inner lining (25), the membrane (20) with the electrical actuator ( 30) is directly non-positively, positively and / or cohesively connected and wherein the electrical actuator (30) is arranged in a recess of a vehicle part (45), designed as a carrier, such a carrier structure being recessed in the area of the actuator (30) and / or is deep-drawn so that there is no contact between the actuator (30) and the carrier structure (45), characterized in that the vehicle part (45) is designed as a carrier in a vehicle door, the electrical actuator (30) being an inertia element (3 1). Device according to Claim 1 , the membrane (20) being polypropylene, PP, acrylonitrile-butadiene-styrene copolymers, ABS, other plastics, fabrics made of carbon fiber or glass fiber, natural fiber materials such as hemp, flax, sisal, cotton and / or other materials, jute, leather, artificial leather , Alcantara, wood, metal such as aluminum or steel, and / or other materials and / or a combination of these materials or consists of these. Device according to one of the preceding claims, wherein the electrical actuator (30) is based on an electrodynamic, permanent dynamic and / or piezoelectric principle. Device according to one of the preceding claims, wherein the actuator (30), of the interior of the vehicle, is arranged behind the interior lining (25). Device according to one of the preceding claims, wherein the actuator (30), from the interior of the vehicle, is arranged in front of the interior lining (25). Device according to one of the preceding claims, wherein the device for generating sound (10) is set up to emit sound between 20 Hz and 20 kHz. Method for producing a device for generating sound (10) according to one of the preceding claims, comprising the steps: - Providing an electrical actuator (30); and - Arranging a membrane (20) on the actuator (30), wherein the membrane (20) consists of part of the inner lining (25) or at least has part of an inner lining (25) of a vehicle and wherein the arrangement of the membrane (20) with the electrical actuator (30) comprises a non-positive, positive and / or material connection. Use of a device for generating sound (10) according to one of the Claims 1 until 6th or one after Claim 7 manufactured device for generating sound (10) for sounding an interior of a vehicle.

Images