DE102007040062A1 - Broadband Exciter - Google Patents

Abstract

A broadband exciter (100) comprising a magnetic element (2) having a concentric aperture, at least one voice coil at least partially movable within and along the concentric aperture, a rod-shaped central element (4) extending through the concentric aperture extends, which is connected to the at least one voice coil and which can be vibrated by this, such that the rod-shaped central element (4) at a first end of the same sound waves in a first continuous frequency range directly and / or indirectly generated and at one second end of the same sound waves in a second continuous frequency range, which overlaps in part with the first continuous frequency range, directly and / or indirectly generated.

Description

The The present invention relates to a broadband exciter. Especially The invention relates to an exciter, the sound vibrations with Including frequencies 0 Hz to more than 80 kHz can generate.

State of the art

Exciter, Shakers, bending wave loudspeakers or loudspeakers from the state of technology By design, only sub-ranges of frequencies of a selected band for example, only infra-frequency (<16 Hz), sub-ranges the audible Frequencies (16 Hz to 16 kHz; subareas of high, medium and high frequencies) Deep tones) or suprabatable Frequencies (more than 16 kHz). Biegewellenlautsprecher have one Mid / high range (MHT) of about 100 to 30,000 hertz. Shakers can Frequencies of about 5 to 100 Hz and subwoofer of about 5 to 1200 Hz. Consequently, must Exciter, Shaker, bending wave loudspeakers and loudspeakers combined be, for example, a necessary for the hi-fi area Frequency range of at least 16 Hz to 20 kHz cover. Problematic with a combination of different elements is that the overlap upper and lower frequency ranges of the individual elements, whereby interference is generated, which is a technical or require electronic correction. This correction means on the one hand an increased expenditure on equipment and succeeds On the other hand, not always ideal.

Further depends on that achievable sound pressure in conventional speakers from the size of the membrane and the strength of the permanent magnet. Consequently, have to be very big and heavy Loudspeakers are designed to have a high sound pressure, for example at concerts.

at usual Speakers, bending wave loudspeakers and Excitern finds one Lifting movement for surface stimulation instead of. Shakers or Basspumps lead a shaking motion from, however, has no controlled longitudinal axis movement. However, in nature, sound waves are generally not pure Lifting motions can be generated to a highly lifelike Playback of recorded sounds with conventional Speakers, bending wave speakers, shakers or bass pumps not done.

Task and solution

consequently There is a need for an exciter that has a frequency spectrum from including 0 to more than 80 kHz can cover, which is small and light and the one possible Lifelike reproduction of acoustic signals of all kinds with high efficiency allows.

This object is achieved by an exciter according to the main claim, which comprises
a magnetic element ( 2 ), which has a concentric opening,
at least one voice coil that is at least partially movable within and along the concentric aperture,
a rod-shaped central element ( 4 ), which extends through the concentric opening, which is connected to the at least one voice coil and which can be caused to oscillate thereby, such that the rod-shaped central element ( 4 ) at a first end thereof directly and / or indirectly generates sound waves in a first continuous frequency range and at a second end thereof directly and / or indirectly generates sound waves in a second continuous frequency range partially overlapping with the first continuous frequency range.

The overlapping The frequency ranges are to be understood as meaning that the lowest Frequency of the first continuous frequency range lower as the lowest frequency of the second continuous frequency range is, and that the highest Frequency of the first continuous frequency range of the lowest Frequency of the second continuous frequency range is equal to or greater than this one is smaller than the highest Frequency of the second continuous frequency range.

moreover the first continuous frequency range represents a mid-high frequency range at the first end of the rod-shaped Central element (mid and high side, MHT side) and the second continuous Frequency range a low-mid frequency range at the second End of the rod-shaped Central element (low and midtones side, BMT side) is.

It is an essential feature of the present invention that the rod-shaped Central element is made to vibrate, and it is authoritative contributes to the sound output of the broadband exciter. In particular, the exciter (especially on the MHT side) as an element of inspiration. z. B. for a ordinary Speaker diaphragm, serve or radiate directly. At the second End of the central element (on the BMT side) this can with a vibrating surface (Swing plate or speaker diaphragm) to be firmly connected, for example via a Screw connection (see detailed description below).

Furthermore, it should be noted that vorzugswei the central element is made of a material whose elasticity properties can be adjusted such that at the first end medium-high-frequency vibrations can be radiated decoupled from the vibrations emitted at the second end. Vibrations not radiated at the first end can propagate to the second end where they contribute to the excitation of the low-mid frequency sound.

According to a development, the broadband exciter continues to comprise
a first annular element ( 1 ) the magnetic element ( 2 ) on the side of the first end of the rod-shaped central element ( 4 ) are arranged adjacent and via a first elastic element ( 40 ), in particular a spring, with the rod-shaped central element ( 4 ) connected;
a second annular element ( 3 ) the magnetic element ( 2 ) on the side of the second end of the rod-shaped central element ( 4 ) are arranged adjacent and via a second elastic element ( 41 ), in particular a spring, with the rod-shaped central element ( 4 ) connected.

In particular, the broadband exciter may further comprise a disk-shaped element ( 22 ), which on the side of the second end of the rod-shaped central element ( 4 ) with the second elastic element ( 41 ) and the rod-shaped central element ( 4 ), and wherein the rod-shaped central element ( 4 ) through a concentric opening of the disc-shaped element ( 22 ). The rod-shaped central element is preferably by means of an external thread and a corresponding internal thread of the disc-shaped element ( 22 ) with this in screw connection. Through the disk-shaped element ( 22 ) is the second elastic element ( 41 ), the Z. B. may be integrally formed with that of a swing plate (such as a door, wall, etc.), at which the second end of the rod-shaped central element ( 4 ), spaced. As a result, a relative to the vibrating plate free swinging of the second elastic element ( 41 ).

In an advantageous development, at least one of the elastic elements ( 40 . 41 ) are designed such that there are torsional vibrations of the rod-shaped central element ( 4 ) (as well as the magnetic element) excites. This can be z. B. can be achieved by the use of not completely rotationally symmetrical springs for the first and / or second elastic element. The torsional vibration can be applied to a vibration plate, such as a door, on which the rod-shaped central element (FIG. 4 ) is fixed, ask. In combination with the vibration transmitted by the stroke oscillation of the central element, the vibration plate can thus be put in a shaking motion, in particular a spiral motion. It has surprisingly been found that the transmission of bass frequencies by the additional torsional vibrations of the rod-shaped central element ( 4 ) is improved compared to the case of the pure stroke oscillation of the central element, that is, the power transmission is significantly increased.

The rod-shaped central element of the broadband exciter according to the invention ( 100 ) can near its first end a disc-shaped plate ( 21 ) and the at least one voice coil can a coil carrier body ( 11 ), which with the disk-shaped plate ( 21 ) of the rod-shaped central element ( 4 ), and at least one coil turn ( 10 ).

Furthermore, the broadband exciter ( 100 ) a permanent magnet ( 12 ) with a concentric opening and a cover element ( 13 ) with a concentric opening formed in the opening of the magnetic element ( 2 ) are arranged, wherein the rod-shaped central element ( 4 ) through the concentric openings of the permanent magnet ( 12 ) and the cover element ( 13 ), and the voice coil bobbin ( 11 ) of the at least one voice coil the cover element ( 13 ) and / or the permanent magnet ( 12 ) surrounds.

In the above examples for the broadband exciter disclosed herein ( 100 ), the rod-shaped central element ( 4 ) rotationally symmetrical about its longitudinal axis, in particular cylindrical, be formed.

Further Details and advantages of the invention will be in the following detailed description explained.

Detailed description

• – ein im Wesentlichen zylinderförmiges Zentralelement, welches in der Nähe eines Endes eine Platte aufweist,
• – ein erstes ringförmiges Element, das einen ersten Hohlraum bildet,
• – ein Magnetelement, das einen zweiten Hohlraum bildet,
• – ein zweites ringförmiges Element, das einen dritten Hohlraum bildet,
• – eine erste und eine zweite Feder in Kontakt mit dem ersten bzw. dem zweiten ringförmigen Element sowie
• – ein scheibenförmiges Element in direktem oder indirektem Kontakt mit der zweiten Feder,

wobei sich die erste Feder, das erste ringförmige Element, das Magnetelement, das zweite ringförmige Element, die zweite Feder und das scheibenförmige Element in dieser Reihenfolge befinden und in direktem Kontakt miteinander stehen können. Durch den ersten bis dritten Hohlraum, die zusammen einen gemeinsamen Hohlraum ergeben, erstreckt sich ein wesentlicher Teil des Zentralelements. Teile des Zentralelements ragen zu beiden Seiten aus dem ersten und dritten Hohlraum heraus.In particular, the broadband exciter according to the invention according to the present invention may comprise in one embodiment:

• A substantially cylindrical central element having a plate near one end,
• A first annular element forming a first cavity,
• A magnetic element forming a second cavity,
• A second annular element forming a third cavity,
• - A first and a second spring in contact with the first and the second annular element and
• A disk-shaped element in direct or indirect contact with the second spring,

wherein the first spring, the first annular element, the magnetic element, the second annular element, the second spring and the disc-shaped element are in this order and can be in direct contact with each other. Through the first to third cavities, which together form a common cavity, a substantial part of the central element extends. Parts of the central element project on both sides out of the first and third cavities.

• – mindestens einen Spulenträgerkörper sowie
• – mindestens eine Spulenwindung,

wobei der Spulenträgerkörper an einem Ende in direktem Kontakt mit den Spulenwindungen und am anderen Ende in Kontakt mit dem Zentralelement steht und sich die mindestens eine Spule zumindest teilweise mit ihren Spulenwindungen im Inneren des mindestens einen im Magnetelement befindlichen zweiten Hohlraums befindet.Furthermore, the device according to the present invention comprises at least one coil comprising

• - At least one coil carrier body and
• At least one coil turn,

wherein the coil support body is in direct contact with the coil turns at one end and in contact with the central element at the other end and the at least one coil is at least partially with its coil turns inside the at least one second cavity in the magnetic element.

central element

The Central element is rod-shaped educated. The diameter can be inside the central element vary, whereby, for example, a rotationally symmetrical structure with wave-like cross-section is obtained.

The Central element points nearby one end a disc-shaped support plate on, for example, the same material as the central element can exist. The carrier plate is preferably circular, but may also have other shapes, such as an oval or a polygon. The support plate supporting end of the central element defined in the device according to the invention the middle and high side (MHT side).

The Central element carries on the one hand for generating sound of the device according to the invention, provides on the other hand, but also the supporting element of the device, because - like described below - wears the central element directly or indirectly all further elements of the device according to the invention.

MHT side of the central element

The Central element can be on the MHT side an internal thread or external thread exhibit. This thread can affect the sound properties the device according to the invention have and allow attachment to an external vehicle.

At the MHT side, the central element may further comprise a coupling device have, for example, an external thread. The device according to the invention can on this external thread on an external carrier be mounted so that they are above the central element itself wearing.

The discoid support plate the MHT page is located at a distance to the end of the MHT page, which still allows the presence of the coupling device. For example, the carrier plate is in - of the MHT side seen - first Third to first quarter of the total length of the central element.

The support plate is connected to the disk formed as the first spring. These Spring is in turn connected to the first annular element. Consequently This results in a substantially closed circular area defined through the disc-shaped support plate and the first spring.

The discoid support plate gives the device stability and has on the sound wave generation Influence.

The Connection of the carrier plate with the first spring, for example, and preferably by gluing reached. As adhesives are basically Suitable adhesives having neutral vibration properties. Silane-crosslinking polymers, rubbery adhesives or chloroprene adhesives are therefor suitable. The adhesive can also be used for damping unwanted natural vibrations of the Ensure device.

The Connection of the spring with the first annular element can, for example and preferably by gluing. Suitable adhesives also have the requirement profile defined above.

feathers

The Feathers can consist of the most diverse materials or material mixtures. Preferably, the material is elastic, oscillatory, not brittle, of low weight, damping and vibration-neutral. For example, they can be made from tissue plates be made based on carbon fibers or other hard tissue. Possible but is also the production of metal or plastic.

The formed as a disk springs have recesses or slots. Preference is given to an even number of recesses, for example four or eight. The geometry and absolute and relative positioning of the recesses are chosen such that in the overlapping region of two recesses, for example, a tongue-shaped ges spring leaf results. Preferably, each of the recesses has three elements: an outer and an inner circular arc segment-shaped element and an element connecting the two circular arc segment-shaped elements. The connecting element connects the beginning or the end of the inner with the end or the beginning of the outer circular arc segment-shaped element. The configuration according to the invention of the recesses in the springs causes a simultaneous rotational movement of the central element during lifting movements of the springs parallel to the longitudinal axis of the central element.

Prefers is an even number of recesses rotationally symmetric arranged a spring.

The first and second spring can be configured the same or different. You can look at it of the material used and / or in terms of number and / or the geometry and / or the arrangement of the recesses and / or in terms differ the material thicknesses. By combining different Springs can be influenced the geometry of the generated vibration. For example, you can on each side of the device according to the invention independently mixed rotary and lifting vibrations, pure rotary or pure lifting vibrations of the magnetic element and the central element are generated.

With The thickness of a spring can also influence the resonant frequency of the device according to the invention become.

BMT side of the central element

On the side opposite the MHT side The central element delivers low and medium frequencies (BMT side). The storage of the central element takes place here a circular one Recess in the center of the second spring.

On the outside the second spring is for reinforcement and sound wave generation a disk-shaped element in the middle in direct or indirect contact attached, for example, glued, by that led the central element is. This element preferably has a thread in the middle in the middle, through which the BMT side of the central element is screwed to to ensure a secure connection of the individual components. Consequently, the BMT side of the central element preferably has an external thread on, on the one hand have sound-generating properties and on the other hand the possibility offers to attach the device on its BMT side on an external support.

The discoid Element gives the device stability and beyond the sound wave generation.

ring elements

As stated above the first spring is in contact with the first ring element. The second spring stands equally in contact with the second ring element. Both ring elements close to the magnetic element at.

The Ring elements of the present invention are solid rings of hard, vibration-neutral material. For example, you can use it pure metals, alloys or plastics. Suitable metals are, for example, aluminum, nickel, titanium, gold, silver, copper, Vanadium, steel and mixtures or alloys thereof, for example Aluminum and iron alloys. Suitable plastics are, for example Polypropylene, polyethylene, polystyrene, polycarbonate, filled or unfilled, reinforced or unreinforced, and mixtures thereof. The ring elements can be made of the same or made of different materials. Each of the ring elements itself may in turn be constructed of ring elements which are preferred made of the same material.

By the ring-shaped Design of the ring elements is in the interior with an air filled Cavity generated, which serves to form vibrations. It it is preferred that both ring elements have different widths and / or inner diameter. The outside diameters are preferably each identical. It is preferred if both ring elements different Have widths at the same inner diameters. For example is a relationship the width of the first to the second ring element of 1.1: 1 to 4: 1, preferably 1.5: 1 to 3: 1 possible. A relationship of 2: 1 is exemplary.

Of the filled with air Cavity also makes a contribution to the cooling of the device according to the invention. Resulting heat is also due to the metallic design of the ring elements Outside derived.

magnetic element

As stated above shut down both ring elements to the magnetic element.

In principle, the magnetic element can have a uniform inner diameter over its entire width. However, it is possible and preferable to subdivide the magnetic element into different subareas, for example a first, second and last (eg third) subarea, wherein the first portion is oriented in the direction of the first ring element and the last portion is oriented in the direction of the second ring element. The individual sections differ with respect to their inner diameter. By varying the inner diameter individual chambers can be created, in which there may be a permanent magnet whose field lines can be targeted by the design of the individual chambers.

Basically the magnetic element has at least one annular concentric gap, which is hardly wider than the outer diameter of the Coil that is at least partially inserted into the gap. At least, however, the gap is so wide that the respective coil contactless can be introduced into their associated gap. The gap extends extending so far into the depth of the magnetic element that the coil turns in the vicinity of the permanent magnet can pass, when they are supplied with electrical power. The gap extends but not by the entire magnetic element, since this otherwise would disintegrate into two concentric cylindrical elements.

In a preferred embodiment with three sections, the first, facing the first ring element Subarea a larger inner diameter on, as the third, the second ring element facing portion. The inner diameter of the second portion is greater than that of the first and third sections. The inner diameter of the third Subarea is only marginal greater than the outside diameter of the central element at the location of the third subregion. To that Central element is in the region of the first portion of a cylindrical cover member arranged. To the central element is in the range of the second partial area a cylindrical one Permanent magnet arranged. The cover element serves for shielding and steering the magnetic field lines emanating from the permanent magnet. The inner diameters of the cover member and the permanent magnet are preferably the same and slightly larger than the outer diameter of the central element in the areas of the cover element and of the permanent magnet. This results in a gap in the first subregion, in the coil carrier body with can immerse the coil turns and a larger cavity in the second portion, the is used in the steering of the magnetic field lines.

In dependence the exact configuration of the sub-areas, the magnetic Flow regulated so that no field lines from the magnetic element escape. It can then be dispensed with an additional shielding or at least be reduced.

Prefers the magnetic element is designed so that essentially no Stray field is emitted, since essentially all field lines in the magnetic DC field are kept. Consequently, the Field lines essentially lossless returned to the recesses. Basically, though also a shield may be provided to the stray field at the exit to prevent. Preferably, the stray magnetic field becomes smaller held as about 0.001 Tesla.

The Magnetic element of the present invention may consist of a cylinder made of magnetizable metal, in the center of which is a cylindrical permanent magnet be made, for example, by turning, drilling, mill or other material removal processes. The cover element and the first to last subarea are then from the same block of material manufactured.

The Magnetic field causes an electromagnetic sliding padding as well a high tilt stability of the central element. This also contributes to that the device according to the invention on the Can carry central element itself.

The field strength in the gap of the permanent magnet is, for example, up to about 2 Tesla, preferably from 0.8 to 1.8 Tesla and more preferred from 0.8 to 1.6 Tesla.

For the magnetizable Material can pure metals or alloys are used. Suitable, for example Iron alloys. The magnet itself can turn from individual annular Magnetic sub-elements may be constructed, preferably of the same Material exist. For example, two identical magnetic sub-elements combined into a magnetic element.

resulting Heat is also derived by the metallic configuration of the magnetic element to the outside.

Kitchen sink

The Device of the present invention comprises at least one coil comprising a coil carrier body and Coil windings. Also conceivable are two or more coils, which are arranged concentrically could be.

Of the Coil carrier body is annular designed as a hollow cylinder or cup. The coil turns extend over an end portion of the bobbin body and are preferably on the inner surface of the coil carrier body.

The coil carrier body can be made of a variety of materials, for example Paper, cardboard, cardboard, plastic, metal, glass, ceramics, wood and / or composites.

The Coil windings are electrically conductive wires or lines that spiral a surface of the coil carrier body are attached. You can of copper, aluminum, silver, gold, iron, tin and their alloys with these metals or other elements as well as superconducting ones Materials exist. The coil resistance is preferably 16 Ohm. The applied amplifier power to operate the device for example, only 6 to 10 watts.

Prefers the coil turns are attached to the inner surface of the coil carrier body. she can alternatively or additionally lie on the outer surface. For example, a coil carrier body on a surface 1 to 50 circumferentially encircling windings, preferably 2 to 20, especially preferably 3 to 15.

The Coil is of flat design and the coil turns are therefore preferably only one layer wound. Multi-layer windings are also possible.

Of the Coil carrier body can with the disc-shaped support plate be connected to the MHT side of the central element. This connection can be done for example by gluing, soldering or welding. A coil carrier body can but also from the same workpiece like this carrier plate manufactured and consequently without interruption with this carrier plate be connected (integral manufacturing). Furthermore, a coil carrier body also with another carrier plate, not with the disc-shaped support plate on the MHT side of the central element. Such a further carrier plate can be located inside the first ring element and in terms Similar to material and geometry or the same as the disc-shaped carrier plate be configured on the MHT side of the central element. The others support plate can be connected to the central element, for example, glued, soldered or welded be or be made with the central element in one piece (integral Production).

A Coil projects at least partially into a recess associated with it in the magnetic element, in particular the coil turns partially protrude on the coil carrier body in a corresponding recess in the magnetic element.

To Applying an electrical voltage to a coil will make this parallel to the depth axis of the recess by the occurring magnetic forces in the Coil windings moves, thereby simultaneously the coil carrier body, the discoid support plate of the central element and thereby ultimately the central element itself be vibrated with the springs attached to it.

At a coil can Furthermore, two lines are attached, over which you the electrical Power supplied becomes. These lines are known in the art known manner each coil attached and to the outside of the device according to the invention guided. For example, you can on the outside The device can be attached to two metal pins that go inside protrude the device and over there Lines the individual coils with the applied to the outside of the metal pins supply electrical voltage.

Further The device may also include at least one coil on the BMT side for power amplification exhibit. The nature and shape of the coil may be that of Coil on the MHT side correspond.

Finally, one can or several additional ones Measuring coils for measuring the coil deflection of the above vibrating coil (s) may be included in the device so that the exact function of the device, ie the deflection of the central element, can be checked during operation of the device.

Assembly of the individual ingredients

The first and second ring element and the magnetic element can on the most different ways are connected. Conceivable are screw connections, in each case one of these elements an external thread and the adjacent Element has a corresponding internal thread, bayonet, screw, Adhesive or welded joints. Basically, the Elements can also be made from a single blank. Especially Is it possible, the first and second ring element and the magnetic element of a single cylindrical To produce blank.

As stated above becomes the central element over the support plate located on its MHT side to the outer edge coupled to the first ring member connected first spring. At his BMT page The central element is formed by a concentric bore in the second spring out and by a disc-shaped Element supported.

consequently the central element is held by the first and second springs. As a result, the inventive broadband exciter be held on its vibrating components, resulting in conventional Exciters, shakers and other acoustic systems is impossible.

General features of the device

Of the Inventive broadband exciter can waterproof, heavy, based on appropriate material selection flammable, unbreakable and easy to build.

Basically he made in every conceivable size become. On the one hand, very small dimensions are conceivable, only through the possible manufacturing techniques On the other hand, very large dimensions are conceivable, the only by the stability properties the materials used are limited.

The Dimensioning of the first and second ring element and others Elements of the device according to the invention takes place preferably according to harmonical laws to produce optimum quality of the To get vibrations.

• – Breite des ersten Ringelements: 20 mm
• – Breite des Magnetelements: 30 mm
• – Breite des zweiten Ringelements: 10 mm
• – Außendurchmesser aller Elemente: 84 mm
• – Innendurchmesser des ersten und zweiten Ringelements: 64 mm
• – Einheitlicher Innendurchmesser des Magnetelements (zur Durchführung des Zentralelements): 15 mm, hierbei
• – Innendurchmesser des ersten Teilbereichs des Magnetelements: 63 mm
• – Innendurchmesser des zweiten Teilbereichs des Magnetelements: 64 mm
• – Innendurchmesser des dritten Teilbereichs des Magnetelements: 15 mm
• – Durchmesser des Spulendrahts: 1,2 mm
• – Durchmesser der einlagigen Spule: 62 mm
• – Breite des Spaltes im Magnetelement: 1,6 mm
• – Länge des Zentralelements: 95 mm
• – Durchmesser des Zentralelements: 10 mm
• – Abstand der Trägerplatte vom MHT-Ende des Zentralelements: 10 mm
• – Durchmesser der Trägerplatte: 62 mm
• – Durchmesser der Trägerscheibe (BMT-Ende): 20 mm
• – Dicke der Trägerscheibe: 10 mm
• – Breite der Ausnehmungen in den Federn: 2 mm
• – Dicke der Federn: 2 mm
• – Symmetrie der Ausnehmungen in den Federn: analog 4

Exemplary dimensions of the individual elements in a device are:

• - Width of the first ring element: 20 mm
• - Width of the magnetic element: 30 mm
• - Width of the second ring element: 10 mm
• - Outer diameter of all elements: 84 mm
• - Inner diameter of the first and second ring element: 64 mm
• - Uniform internal diameter of the magnetic element (for the implementation of the central element): 15 mm, here
• - Inner diameter of the first portion of the magnetic element: 63 mm
• - Inner diameter of the second portion of the magnetic element: 64 mm
• - Inner diameter of the third portion of the magnetic element: 15 mm
• - Diameter of the coil wire: 1.2 mm
• - Diameter of the single-layer coil: 62 mm
• - Width of the gap in the magnetic element: 1.6 mm
• - Length of the central element: 95 mm
• - Diameter of the central element: 10 mm
• - Distance of the carrier plate from the MHT end of the central element: 10 mm
• - Diameter of the support plate: 62 mm
• - Carrier disc diameter (BMT end): 20 mm
• - Thickness of the carrier disc: 10 mm
• - Width of the recesses in the springs: 2 mm
• - thickness of the springs: 2 mm
• - Symmetry of the recesses in the springs: analog 4

The Combination of the above-mentioned inner diameter of the first and the second ring element and the width given above is preferred, for optimal quality to get the generated vibrations. Consequently, it is preferable if starting from the dimensions described above integer multiples n in the construction of larger embodiments be applied to the present device, for example n = 1 to 20. It is also preferable if smaller in construction embodiments the present devices root breaks (1 / n) are applied, for example 1/100 to 1/2. Exemplary enlargement or reduction factors starting from those described above Dimensions are: 2, 3, 4, 5, 6, 7, 8, 9, 10 or 1/2, 1/3, 1/4, 1/5, 1/6, 1/7, 1/8, 1/9, 1/10. For mobile devices or small music players offers, for example, a reduction of 1/10, which is too an outer diameter of about 4 to 5 mm leads. For speaker systems for public address at large concerts For example, enlargements are possible around 2 to 6, which is outside diameters from 84 to 252 mm leads.

Further advantages and applications the device

With the devices of the invention it is possible to play a frequency of 0 Hz permanently. Here is a constant voltage applied, resulting in a constant deflection of the central element and all its associated parts, like the first one and second spring leads.

Further Is it possible, Frequencies in the range of> 0 Hz to about 80 kHz or more. The device according to the invention gives off frequencies in the typical mid and high frequencies (from about 500 Hz) on the MHT side of the central element again. frequencies in the typical low and midrange (below about 500 Hz) on the BMT side of the central element. Here can the device with the protruding from the BMT side of the device End of the central element punctiform be brought into contact with a vibrating plate, whereby the vibrations generated transferred punctiform to this vibrating plate and thus synchronous with the central element of the device Oscillation is shifted.

When Swing plate is every imaginable material that prefers in area and / or arched Design is present. These include car windscreens, car rear windows, Window panes, metal plates, plastic plates, flagstones, Wooden boards, roof and ceiling constructions (inside and outside), walls, ceilings, Plasterboard, stud walls and Floors of Buildings and / or objects.

By the described self-supporting properties of the device according to the invention is allows the connection to any object.

insofar the devices according to the invention are suitable for the construction of sound systems of shallow depth, since the otherwise used in the prior art large, heavy and space-intensive Low tone avoided and by only a larger swing plate sufficient size and a or a plurality of devices according to the invention mounted thereon can. Due to the waterproof design of the device according to the invention is an indoor and outdoor sound reinforcement possible, where water or water vapor is present.

Also can by Gleichschaltung several inventive devices on a vibrating plate very high sound pressure levels, for example more than 90 to 100 dBA be achieved.

The inventive device can be fixed at a specific location via both the BMT and MHT pages. For example, it is conceivable that devices with the BMT side to attach to a ceiling and to play the lower frequencies Use ceiling cladding elements.

By These exemplary applications will clearly show that the device the present invention at its oscillating central element on objects can be mounted. Due to the compact design is therefore the self-supporting, essentially punctiform coupling to each object allows. In conventional Speakers this is not possible because the vibrating membrane is too sensitive to the total weight of a Speaker to wear.

As described above, may be a group of devices according to the invention be operated synchronously, with the BMT pages of all members the group are mounted on a swing plate. Are the individual However, group members can be individually controlled, this can be done by the composer given sound image in the room are generated as if the orchestra even played in the room.

in the Unlike traditional Loudspeakers become sound waves in the devices according to the invention by a lifting and rotating movement of the sound-generating elements stimulated. The torsional vibrations cause interference Reflections avoided, for example, on solid objects or walls. The generated sound waves are broken at the obstacles; a reflection hardly takes place instead of; Interference is reduced or avoided.

In summary, the devices according to the invention can offer the following advantages: they can be self-supporting, they can have a low energy consumption, they can have a low heat generation, they can have a low scattered radiation of less than 10 ^-3 T, they can cause the formation of interference waves Avoid overlapping frequency ranges when using different exciters, shakers, bending wave loudspeakers or loudspeakers from the prior art and they can produce the sound of nature modeled sound waves via a hub-and-turn movement of the central element.

The Devices according to the invention can installed in furniture as well as on walls, Pictures, beds, car windows, glass panes, gypsum boards, stud walls, membranes and living organisms are attached.

she can for the reproduction of acoustic signals such as speech and music, Noise generation, be used in the spa and in medicine. For example can to the stress therapy, as a sleep aid and in the decubitus prophylaxis treatment, pain treatment, treatment of circulatory disorders and Muscle building can be used in which to the respective patient adapted frequencies are radiated on this.

Further can the devices of the invention during technical processes Find application. For example, when drilling the ground through simultaneous use of by the devices according to the invention Sound waves released and thereby the force to be applied be reduced. With a corresponding frequency, the ground can be condensed again.

in the Automotive area can be a complete sonication of the interior of an automobile achieved by only two broadband exciter according to the invention become. Could do this for example, the exciters are mounted on the windshield. A simplified manufacturing, lower weight of the car and thereby reduced fuel consumption is the result.

at correspondingly small dimensions, the inventive broadband exciter in mobile devices and mobile sound reproduction systems such as MP3 players are used.

Further It can be used to create underwater sounds or music for example, in whirlpools, baths, swimming pools or Birthing pools.

As well is an application in Ein-, Durchschlaf- and massage blankets possible.

1

first ring element

2

magnetic element

3

second ring element

4

central element

5

cavity

10

coil windings

11

Coil support body

12

permanent magnet

13

cover member

20

external thread (MHT-side)

21

Disc-shaped carrier plate (MHT-side)

22

Disc-shaped element (BMT side)

23

adhesive

24

external thread (BMT side)

30

magnetic gap

40

first Spring (MHT side)

41

second Spring (BMT side)

50

leads

51

insulation

60

recess

61

slot

62

first Slot portion

63

second Slot portion

64

third Slot portion

65

tongue-shaped spring leaf

100

contraption

figure description

Show it 1 the cross section of a device according to the invention 100 . 2 a section of the device 100 . 3 a variant of the section 2 . 4 an exemplary embodiment of a spring 41 and 5 an exemplary embodiment of a spring 40 ,

In 1 is a device according to the invention 100 shown in which a first ring element 1 with a magnetic element 2 and this in turn with a second ring element 3 connected is. A central element 4 is located in the center of the ring elements 1 . 3 and magnetic element 2 generated cavity 5 , With the central element 4 is with glue 23 a cup-shaped coil carrier body 11 connected, at the end of three coil turns 10 are located. The coil turns protrude into the magnetic gap 30 by a cylindrical cover element 13 and a first portion of the magnetic element 2 is formed.

A cylindrical permanent magnet 12 is located in the second part of the magnetic element 2 and has the same dimensions as the cover element 13 in the first subarea. In the first ring element 1 there are two connecting wires 50 passing through the ring element 1 protrude and each with an insulating cover 51 are shielded. The central element 4 has a MHT side with coupling device 20 (External thread) on which a disc-shaped support plate 21 wearing. On the carrier plate 21 is a first spring 40 by means of adhesive 23 centered, in turn, with glue 23 on the first ring element 1 is attached. The central element points at its BMT side 4 a second spring 41 on, on which a disk-shaped element 22 is attached. The feather 41 is about glue 23 with the outside of the second ring element 3 connected. The BMT side of the central element 4 has an external thread 24 on.

In 2 is a section of a device 100 shown in which the bobbin body 11 , the three coil turns 10 has, with adhesive 23 to the disk-shaped carrier plate 21 on the MHT side of the central element 4 is appropriate. Both sides of the central element have external threads 20 (MHT page) and 24 (BMT page).

In 3 is a section of a device 100 shown in which the bobbin body 11 , the three coil turns 10 has, the disc-shaped support plate 21 on the MHT side of the central element 4 and the central element 4 are made of a workpiece. Both sides of the central element have external threads 20 (MHT page) and 24 (BMT page).

In 4 becomes a spring 41 shown a recess 60 in the middle, through which a central element (not shown) 4 can be performed. The feather 41 has four slots 61 on, each of three sub-areas 62 . 63 . 64 consist. Two slots each 61 form a tongue-shaped spring leaf 65 ,

In 5 becomes a spring 40 shown in the middle a disk-shaped carrier plate 21 having, to a (not fully shown) central element 4 belongs. You can still see the external thread 20 , The feather 40 has four slots 61 on, each of three sub-areas 62 . 63 . 64 consist. Two slots each 61 form a tongue-shaped spring leaf 65 ,

In The figures are partial for clarity distances drawn between the individual elements. It is self-evident that these distances do not exist when assembling the devices according to the invention.

Claims (28)

Broadband exciter ( 100 ) comprising a magnetic element ( 2 ) having a concentric aperture, at least one voice coil that is at least partially movable within and along the concentric aperture, a rod-shaped central element ( 4 ), which extends through the concentric opening, which is connected to the at least one voice coil and which can be caused to oscillate thereby, such that the rod-shaped central element ( 4 ) at a first end thereof directly and / or indirectly generates sound waves in a first continuous frequency range and at a second end thereof directly and / or indirectly generates sound waves in a second continuous frequency range partially overlapping with the first continuous frequency range. Broadband exciter ( 100 ) according to one of the preceding claims, further comprising a first annular element ( 1 ) the magnetic element ( 2 ) on the side of the first end of the rod-shaped central element ( 4 ) are arranged adjacent and via a first elastic element ( 40 ), in particular a spring, with the rod-shaped central element ( 4 ) connected; a second annular element ( 3 ) the magnetic element ( 2 ) on the side of the second end of the rod-shaped central element ( 4 ) are arranged adjacent and via a second elastic element ( 41 ), in particular a spring, with the rod-shaped central element ( 4 ) connected. Broadband exciter ( 100 ) according to claim 2, further comprising a disc-shaped element ( 22 ), which on the side of the second end of the rod-shaped central element ( 4 ) with the second elastic element ( 41 ) and the rod-shaped central element ( 4 ), and wherein the rod-shaped central element ( 4 ) through a concentric opening of the disc-shaped element ( 22 ). Broadband exciter ( 100 ) according to claim 2 or 3, in which at least one of the elastic elements ( 40 . 41 ) is designed such that there are torsional vibrations, in particular helical torsional vibrations, of the rod-shaped central element ( 4 ). Broadband exciter ( 100 ) according to one of the preceding claims, in which the rod-shaped central element ( 4 ) near its first end a disk-shaped plate ( 21 ) having; and the at least one voice coil a coil carrier body ( 11 ), which with the disk-shaped plate ( 21 ) of the rod-shaped central element ( 4 ), and at least one coil turn ( 10 ). Broadband exciter ( 100 ) according to claim 5, further comprising a permanent magnet ( 12 ) with a concentric opening and a cover element ( 13 ) with a concentric opening formed in the opening of the magnetic element ( 2 ) are arranged, wherein the rod-shaped central element ( 4 ) through the concentric openings of the permanent magnet ( 12 ) and the cover element ( 13 ), and the voice coil bobbin ( 11 ) of the at least one voice coil the cover element ( 13 ) and / or the permanent magnet ( 12 ) surrounds. Broadband exciter ( 100 ) according to one of the preceding claims, in which the rod-shaped central element ( 4 ) is rotationally symmetrical about its longitudinal axis, in particular cylindrically shaped. Broadband exciter ( 100 ) according to claim 1, in which the rod-shaped central element ( 4 ) near one end a disk-shaped plate ( 21 ), and further comprising - a first annular element ( 1 ), which forms a first cavity, - a magnetic element ( 2 ), which forms a second cavity, - a second annular element ( 3 ) forming a third cavity, - a first and a second spring ( 40 . 41 ) in contact with the first and second annular elements ( 1 . 3 ), - a disc-shaped element ( 22 ) in direct or indirect contact with the second spring ( 41 ) and - at least one coil comprising a coil carrier body ( 11 ) and at least one coil turn ( 10 ). Broadband exciter ( 100 ) according to claim 8, characterized in that the first spring ( 40 ), the first annular element ( 1 ), the magnetic element ( 2 ), the second annular element ( 3 ), the second spring ( 41 ) and the disc-shaped element ( 22 ) are in this order. Broadband exciter ( 100 ) according to claim 8 or 9, characterized in that the coil carrier body ( 11 ) at one end in direct contact with the coil turns ( 10 ) and at the other end in contact with the central element ( 4 ) and the at least one coil at least partially with their coil turns ( 10 ) inside the at least one in the magnetic element ( 2 ) located second cavity. Broadband exciter ( 100 ) according to any one of claims 8 to 10, characterized in that a substantial part of the central element is formed by the first to third cavities which together form a common cavity ( 4 ) and parts of the central element ( 4 ) protrude on both sides of the first and third cavities. Broadband exciter ( 100 ) according to one of claims 8-11, characterized in that the central element ( 4 ) has a middle and high-frequency side (MHT side) and a bass and midrange side (BMT side), with an inner and / or outer thread on its MHT side and an inner and / or outer side on its BMT side. and / or external thread is present. Broadband exciter ( 100 ) according to any one of claims 8-12, characterized in that the springs ( 40 . 41 ) are formed as discs. Broadband exciter ( 100 ) according to one of claims 8-13, characterized in that the springs ( 40 . 41 ) Recesses ( 61 ), preferably an even number of recesses ( 61 ), more preferably four or eight. Broadband exciter ( 100 ) according to any one of claims 8-14, characterized in that the geometry and absolute and relative positioning of the recesses ( 61 ) in the springs ( 40 . 41 ) are selected such that in the overlapping region of two recesses ( 61 ) a tongue-shaped spring leaf ( 65 ). Broadband exciter ( 100 ) according to any one of claims 8-15, characterized in that the ring elements ( 1 . 3 ) as well as the magnetic element ( 2 ) have different widths and / or inner diameter at the same outer diameters. Broadband exciter ( 100 ) according to one of claims 8-16, characterized in that the ring elements ( 1 . 3 ) And the magnetic element are made of a workpiece. Broadband exciter ( 100 ) according to any one of claims 8-17, characterized in that the central element ( 4 ), the disk-shaped plate ( 21 ) and the coil carrier body ( 11 ) are made of the same workpiece. Broadband exciter ( 100 ) according to one of claims 8-18, characterized in that the magnetic element ( 2 ) at least one annular concentric gap ( 30 ) having. Broadband exciter ( 100 ) according to one of claims 8-19, characterized in that the magnetic element ( 2 ) has three subregions: a first, the first ring element ( 1 ), a second partial region located between the first and third partial region and a third, the second annular element ( 3 ) facing portion. Broadband exciter ( 100 ) according to claim 20, characterized in that the first portion has a larger inner diameter than the third portion, the inner diameter of the second portion is greater than that of the first and third portion and the inner diameter of the third portion is only slightly larger than the outer diameter of Central element ( 4 ) at the location of the third subarea. Broadband exciter ( 100 ) according to one of claims 20 or 21, characterized in that around the central element ( 4 ) in the region of the first portion a cylindrical cover element ( 13 ) and around the central element ( 4 ) in the region of the second portion of a cylindrical permanent magnet ( 12 ) are arranged. Broadband exciter ( 100 ) according to one of claims 8-2, characterized in that it further comprises at least one coil on the BMT side and / or one or more additional measuring coils. Use of the broadband exciter ( 100 ) according to one of the preceding claims for carrying out a lifting movement or for reproducing frequencies from 0 Hz to 100 kHz. Use of the broadband exciter ( 100 ) according to one of claims 1 to 22 for reproducing acoustic signals such as speech and music, defined frequencies and frequency bands for generating noise, in the wellness area, in medicine, for stress therapy, for vibroacoustics, as sleep assistance, in decubitus prophylaxis or treatment, pain treatment, treatment of circulatory disorders, for building muscle, for soil loosening, for soil compaction, for the interior of an automobile, for mobile devices and mobile sound reproduction systems such as MP3 players, for generating underwater sounds or music such as in whirlpools, bathtubs, Swimming pools or birth pans, as well as in single, Durchschlaf- and massage blankets. Device comprising at least one broadband exciter ( 100 ) according to one of claims 1 to 22 and at least one vibrating plate. Device according to Claim 26, in which the rod-shaped central element ( 4 ) is attached at its second end to the vibrating plate. Apparatus according to claim 26 or 27, characterized in that the vibrating plate has a planar and / or curved configuration, preferably car windscreens, car rear windows, windows, metal plates, plastic plates, stone slabs, wood panels, roof and ceiling structures (inside and outside), walls, ceilings , Plasterboard, stud walls and floors of construction works and / or objects.