EP2335423B1 - Élément atténuateur - Google Patents

Élément atténuateur Download PDF

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Publication number
EP2335423B1
EP2335423B1 EP09775796.7A EP09775796A EP2335423B1 EP 2335423 B1 EP2335423 B1 EP 2335423B1 EP 09775796 A EP09775796 A EP 09775796A EP 2335423 B1 EP2335423 B1 EP 2335423B1
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EP
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Prior art keywords
damper element
damper
main surface
receptacle
element according
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EP09775796.7A
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German (de)
English (en)
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EP2335423A1 (fr
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Christian Rohrer
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/026—Supports for loudspeaker casings

Definitions

  • the invention relates to a damper element for a damper for mounting between a device of the sound system or consumer electronics, in particular an audio player, or a musical instrument and a footprint.
  • the invention further relates to a damper with such a damper element.
  • Loudspeaker boxes have the problem that vibrations of the diaphragm are transmitted to the housing of the loudspeaker box and from there to the footprint on which the loudspeaker box stands. This can lead to sound distortions. It is known to derive the vibrations occurring at the speaker box housing by means of so-called spikes in the ground. In this case, however, in vibrating surfaces, such. As a parquet floor or shelves, the problem that the forces are transmitted to the floor space and then it comes to uncontrolled and unwanted vibration emissions that lead to distortion in the sound. There are also retransmissions of the resonant vibrations on the speaker housing possible, which lead to further impairment of the sound.
  • dampers are used primarily for decoupling the device, d. H. they prevent the footprint from resonating. In addition, they are suitable for eliminating narrowband resonances of the housing. Due to the foregoing, the use of dampers is particularly indicated when vibrating surfaces are present, such. B. a parquet floor or a shelf. A damping adapted to the device, the pitch and the room acoustics leads in particular to a more precise bass, clearer mids and an improved spatiality of the reproduced sound.
  • dampers are usually formed of an elastic material or comprise elastic elements such.
  • B. springs. Damper can be integrated into a firmly connected to the housing foot, they can be screwed to a housing or simply be pushed under the housing to be damped. They can be designed small area or large area, z. B. as a base plates whose base corresponds to that of the device or exceeds them.
  • the damper element ie the part of the damper, which is primarily responsible for the damping, made of a material with one of the damping to be achieved elasticity.
  • the DE-OS 43 40 493 A1 (Joachim Lars Berndt ) a vibration-absorbing foot for loudspeaker boxes, which consists of cellular rubber or a similar elastomeric material whose structure is composed of at least two superimposed, filled with a gaseous element intermediate layers.
  • the US 4,493,471 (Maclnnis ) describes a speaker stand, which dampens the vibration transmission from the floor to the speaker and vice versa.
  • the speaker stand includes a solid floor panel on which a cushion of noise absorbing material, such as foam rubber or other elastomers, is applied.
  • the surface of this pillow has hills and valleys, which form air pockets with the underside of a loudspeaker. Bars of anti-vibration material are attached to one edge of the pillow. These have a sufficiently high degree of stability that a speaker placed on it can not sink so far that the pad is flattened.
  • the US 5,804,776 A discloses a device for damping the transmission of vibration from an electro-acoustic device on its base or vice versa.
  • the device comprises a metal-made block having a periphery, a top surface, and a bottom surface.
  • On the lower surface there is a base part having a matrix such that a contact area of the base part is smaller than the area of the lower surface.
  • In the upper surface there is a recess in which there is a rolling element made of metal.
  • the rolling element is disposed between the electro-acoustic device and the block.
  • another block is located, which rests inverted with the indentation on the rolling element.
  • damper elements are known.
  • the payload adapter includes a payload carrier system. It keeps the axial and radial vibrations with natural frequencies of the carried payload, which are transmitted to the payload, as low as possible.
  • the payload adapter includes an inner and an outer locking ring, as well as a first and a second outer layer, which form a hollow body. The first and the second outer layer are separated by radially aligned frames.
  • the payload adapter is made of graphite-epoxy or other composites. The spaces between the frames can be filled with an elastic material.
  • the US 3,770,560 (American Cyanamid Company) describes a noise absorbing laminate which reduces noise transmission and absorbs noise in the air.
  • the laminate consists either of a double-layered area consisting of a perforated layer and a continuous layer, wherein the perforated layer (1) is connected to a further, perforated, outer layer, or a layer with recesses, which with a perforated, outer layer connected is.
  • the layers are made of metal or plastic.
  • the DE 198 24 445 B4 (Calenberg engineers, planned elastic storage GmbH) describes an elastomeric bearing for the planar support of building parts, structures or the like. These are plate-shaped elastomer bearings, which have support ribs on both sides of the plate. These two-sided attached support ribs can be arranged offset or not offset on the opposite sides and can also each enclose a cavity. Specifically, support ribs having a substantially trapezoidal cross section are mentioned. As a result, a spring characteristic of the elastomer bearing is achieved, which proceeds progressively in the lower load range.
  • the elastomeric bearing may also consist of a first plate-shaped part and a second plate-shaped part, in each case on one side of a part, the support ribs are formed and the two parts with their side facing away from the support ribs means for a positive connection of the two parts.
  • the US 6,427,965 B1 discloses a device for ground contact of machines, which provides protection against shock and vibration.
  • the device consists of an insulation pad, which is placed between the floor and the ground contact of a machine.
  • This insulation pad is formed of an elastic, absorbent material.
  • a base portion of the insulation pad on which the ground contact of a machine rests is flat and has a thickness of about 1 inch.
  • the base part can have upwardly directed cones, which consist of the same Piece as the base part are poured.
  • a plate of a reinforced material may be introduced or cast.
  • the base part can also be constructed from three separate layers.
  • the object of the invention is to provide a the technical field mentioned above belonging damper element, which is simple and durable and which allows a sonically advantageous damping of the device.
  • the damper element is integrally formed of a resilient plastic material and has a structure with a plurality of spaced-apart areas of reduced cross-section. It is also designed such that when loaded damper element a first spring constant in the axial direction, which corresponds to a direction of maximum load, and a second spring constant in a direction perpendicular to the axial direction radial direction, differ by more than 30%.
  • the damper element has such recesses that a plurality of circumferential webs are formed, which are interconnected by a plurality of substantially radial webs.
  • the one-piece design of the damper element made of an elastic plastic material allows a simple and cost-effective production, for example by means of an injection molding process.
  • the areas of reduced cross-section may be blind-hole-like recesses, continuous openings or internal recesses.
  • the damper element in the vertical direction on the one hand and in the horizontal direction on the other hand in different ways, this is significant in that the device weight loads the damper element in the vertical direction and thus leads to a considerable bias, which is usually much higher than a bias in the horizontal direction.
  • the spring constant of the inventive damper elements is not constant because they do not behave like an ideal spring.
  • first spring constant or second spring constant refer to the rest position of the damper element, which is given when the device to be damped rests on the or the damper elements and neither the device nor the footprint vibrations act on the or the damper elements . Due to the fact that the device weight usually acts in the vertical direction on the damper element and thus in this direction is given a much higher bias, the material and / or the geometric structure of the damper element in the invention are adapted so that the effective Spring constants are matched to each other. This approximation is achieved in particular by the appropriate dimensioning and arrangement of the areas of reduced cross-section.
  • the circumferential webs ensure a uniform support of the forces acting axially on the damper element forces, while the radial webs the circumferential webs mechanically support and at the same time ensure the elasticity in the radial direction. Due to this preferred geometry, when the damper element is loaded, a similar elasticity (spring constant) in the axial direction on the one hand and in the radial direction on the other hand is made possible.
  • the damper element is designed such that at loaded damper element, a first spring constant in the axial direction, which corresponds to a direction of maximum load, and a second spring constant in a direction perpendicular to the axial direction radial direction, by more than 20%, different.
  • thermoplastic elastomers especially olefin-based thermoplastic elastomers (TPE-O), are particularly suitable as material for the damping element according to the invention.
  • blind tests have proven to offer sonic advantages over other materials; In addition, they provide a long life because the material retains its initial elasticity for a very long time. Furthermore, such materials are commercially available with the optimal hardness for damping and can be processed economically, for. B. by injection molding. Finally, these plastics are available in grease-free form, so that damage to the footprint at the contact points are avoided.
  • TPE In principle also other elastic plastic materials used, such.
  • As pure EPDM butadiene rubber (BR), polyurethanes or polyamides.
  • the damper element is made of a foamed plastic material, in particular a foamed TPE.
  • foamed materials are advantageous in terms of achievable sound enhancements. By foaming the vapor properties can be specifically optimized. Good long-term properties are also inherent in the foamed materials.
  • the foaming is preferably carried out by the known use of blowing agents and gases in an injection molding process.
  • a suitable method for example, discloses DE 42 13 263 A1 (Astro-Valcour).
  • a hardness of the material used for the damper element is advantageously in the range 10 to 70 Shore A, preferably 15 to 55 Shore A (measured in each case according to DIN 53505, 7868, holding time 15 s, at 23 ° C.).
  • the optimal hardness for a damper element is a function of the structure used as well as the geometric dimensions of the element on the one hand and the weight of the device to be damped on the other hand. For example, for heavier equipment, the use of a material with greater hardness is indicated.
  • a damping system is provided which comprises a series of damper elements made of materials of different hardness.
  • a ratio of a maximum extension of the damper element to a height of the damper element is in the range of 2.25 - 5.5, preferably in the range of 2.75 - 4.0.
  • the damper element preferably has a circular-cylindrical shape, in which case the maximum extent coincides with the diameter of the element.
  • the values given for the ratio between maximum extent (ie eg diameter) and height make it possible to produce damper elements which are not expensive Additional measures allow a mechanically stable storage of the device, but at the same time are also able to optimally damp vibrations in both the vertical and in the horizontal direction.
  • this may also have a ratio of less than 2.25.
  • the ratio may be greater than 5.5.
  • the damper element has a continuous first main surface, while a second main surface, which is opposite to the first main surface, is provided with a plurality of spaced blind-hole-like recesses.
  • the continuous main surface may in particular form the contact surface with the footprint. It has been found that such a structure enables the desired damping properties, while due to the continuous main surface penetration of dirt into the damper element can be prevented and the mechanical stability of the element is improved.
  • the element can also be designed differently, in particular if it is used in an encapsulated form, where the penetration of dirt through the encapsulation is prevented anyway and a separate element for contacting the footprint is available.
  • the aforementioned structuring is particularly advantageous in the case of damping elements which have a circular-cylindrical shape.
  • the structure formed by the circumferential and radial webs advantageously has a rotational symmetry, the rotational symmetry preferably being at least six-part, particularly preferably at least eight-part.
  • Such rotational symmetry ensures a uniform elasticity over the entire surface of the damper element, regardless of its rotational position.
  • the number of radial webs and / or the distance of the circumferential webs may be different depending on the distance from the axis of symmetry, without the rotational symmetry must be abandoned.
  • proportions can also be provided.
  • the proportion can be selected larger, with a damper element made of soft material, which is intended for the damping of lighter devices, the proportion can be selected smaller.
  • a sliding surface is formed on the continuous first main surface. If the damper element mounted on the housing to be damped such that it forms the contact surface with the footprint when the damper element z. B, the lowest part of a housing foot This makes it easy to move the device, especially on smooth floors such as parquet or stone floors.
  • the sliding surface is preferably formed on the first main surface of the damper element, i. H. a piece of a slip-resistant material is bonded to the damper material during injection molding.
  • a suitable material in particular polyamide has been found, but other materials are possible, for. B. plastics with a certain proportion of PTFE.
  • the sliding surface is missing.
  • the damper element is simply underlaid the device to be damped, it thus forms the actual damper.
  • the damper comprises additional components in addition to the actual damper element. How these are formed depends on the nature of the damper, d. H. whether it is a housing foot, a support plate, a damper attachable to a housing foot, etc.
  • One of these further components is in particular a holder for the damper element, which can be attached to the device to be damped.
  • most devices of the public address or consumer electronics screw on which can be fixed device feet or just damper in a conventional manner.
  • the holder is designed as a receptacle for the damper element, which encloses a lateral surface of the recorded damper element fitting. This ensures that the axial forces acting on the damper element due to the weight of the device to be damped are evenly distributed to the damper element.
  • the enclosing receiving increases both the axial and the radial mechanical stability of the damper element and its life, since it prevents the damper element due to the weight load "flow away" to the outside.
  • the receptacle comprises a threaded opening for receiving a fastening screw or a fastening adapter.
  • a fastening screw or a fastening adapter allows a simple and secure attachment of the damper to the device to be damped.
  • Mounting adapters allow the damper to be adapted to different bolt dimensions. This is advantageous in that the screws present in commercially available devices do not have a standardized size.
  • this threaded opening is provided with a thread which does not extend over an entire length of the threaded opening.
  • a tightening a screw or a threaded bolt or a threaded rod is made possible, so that a support on the outside of the receptacle or on a counterpart is unnecessary.
  • a receptacle for a counterpart in particular for a nut, is formed in the non-threaded portion of the threaded opening.
  • the recording comprises a support surface for the device or the musical instrument, wherein the support surface is lower with recorded damper element than the second main surface of the damper element.
  • This allows the damping of the device or the musical instrument, without its setting height is greatly increased and substantially independent of the vertical extent of the damper element.
  • Such a damper is particularly advantageous for damping a grand piano: An increase in the setting height is undesirable there because it usually leads to a lifting of the pedals. Can the legs of the wing on the inventive damper with lower lying support surface are provided, a sound optimal damping with sufficiently high-dimensioned damper elements is achieved without the ergonomics is significantly impaired.
  • the receptacle advantageously comprises an outer region for receiving the damper element or a plurality of damper elements and an inner, lowered region for forming the support surface.
  • This allows a uniform distribution of the weight of the device or musical instrument to be damped on a plurality of damper elements or on the surface of a damper element surrounding the support surface. If only one damper element is used, this is advantageously annular and encloses the support surface in its received state. It is in principle also possible to design such a damper element in such a way that it has a lower height in the region of the support surface than in a surrounding region, so that likewise a lowering of the support surface under the second main surface of the damper element formed by the regions of greater height becomes.
  • damper elements may be, for example, partially ring-shaped or else cylindrical, such as damper elements for device feet.
  • the plurality of damper elements are arranged uniformly in the outer region, z. B. each with the same angular distance.
  • the damper may also comprise an additional slider plate which can be fastened on the continuous first main surface of the damper element.
  • the attachment can be effected, for example, in that plug holes with a small cross section are formed in the damper element and that the slider plate has inwardly projecting pins whose cross section is minimally larger than that of the plug holes. Due to the elasticity of the damper material, the pins can still insert into the plug holes and are frictionally held there. To ensure good insertability, the pins can be completely or partially conical.
  • the slider plate is advantageously fastened to the damper element such that it does not contact the receiver for the damper element. Thus, an undesirable vibration transmission between the slide plate (and thus the footprint) and the Recording (and thus the device or musical instrument) are avoided.
  • the slider plate can z. B. made of a plastic such as nylon.
  • the FIG. 1 shows a schematic plan view of a first embodiment of a damping element according to the invention
  • the FIG. 2 is a schematic representation of a cross section through the damper element along in the FIG. 1 Plotted plane A - A.
  • the damper element 1 has a substantially cylindrical outer shape and comprises an upper cylindrical portion 10 and a coaxial with the upper portion 10 lower cylindrical portion 20, whose diameter is reduced compared to the upper portion.
  • the diameter of the upper portion 10 is 43 mm
  • the diameter of the lower portion 20 is 35 mm (in FIG FIG. 1 the circumference of the lower portion 20 is shown in dashed lines).
  • the height of the upper portion 10 is 10 mm, that of the lower portion 20 is 3 mm.
  • a circumferential groove 16 is excluded in the upper portion 20.
  • the damper element is manufactured in one piece and homogeneously in an injection molding process from a foamed thermoplastic elastomer based on olefin (TPE-O), for example from the material Santoprene® 201-45 commercially available from Exxon Mobile, which contains 3% by weight of a commercial one for the foaming process Propellant were added.
  • TPE-O foamed thermoplastic elastomer based on olefin
  • the hardness of the starting material is 45 Shore A.
  • a profiling 11 is formed, which comprises a series of prismatic, blind hole-like recesses 12a, 12b, 12c.
  • the depth of the recesses 12a-c in the illustrated embodiment is 9 mm, they extend thus only in the upper portion 10 and do not engage in the lower portion 20 a.
  • This is formed continuously and forms on its lower side a closed outer surface 21.
  • the structure of the upper portion 10 and its outer surface 13 results from an arrangement of three circumferential, annular webs 14a, 14b, 14c which are connected to each other by radial webs 15a, 15b.
  • the widths of the circumferential webs 14a-c and the radial webs 15a, b are each equal to each other.
  • the width of the circumferential webs 14a-c is 3 mm, and the width of the radial webs is also 3 mm.
  • the circumferential webs 14a-c also have the same distances, so are the inner radii of the three webs 14a-c in the illustrated embodiment, 37 mm, 21.5 mm and 6 mm.
  • the radial webs 15a are uniformly arranged at an angular distance of 45 °.
  • these webs 15a further radial webs 15b run between the outer peripheral web 14a and the central circumferential web 14b.
  • the damper element thus has an eight-part rotational symmetry.
  • the blind-hole-like recesses 12a-c result between the webs, wherein the recesses 12a, 12b between the outer web 14a and the inner web 14c have the shape of circular ring segments and wherein the central recess 12c is cylindrical.
  • the recesses In the region of the surface 13 of the upper portion 10 of the damper element 1, the recesses have an area fraction of about 31%. Due to the fact that the lower portion 20, which forms the contact surface with the footprint, does not extend to the outer circumferential ridge 14a, takes place in the transmission of the forces to be derived necessarily a distribution of the same over the circumferential and radial webs. A direct transfer of acting in the edge region of the damper element 1 forces on the footprint is prevented.
  • FIG. 3 is a schematic representation of a cross section through the recorded in a receptacle 2 of a first embodiment of a damper 3 damper element 1.
  • the receptacle is circular symmetrical and comprises a hollow cylindrical portion 30 which is closed on one side by a cover surface 40 is.
  • a circumferential nose 32 is formed, which extends perpendicular to the symmetry axis of the receptacle 2 inwardly.
  • the dimensions of the hollow cylindrical portion 30 are selected so that the damper element 1 can be suitably received, wherein the nose 32 of the receptacle 2 engages in the groove 16 of the damper element 1 and thus holds this form-fitting manner. This ensures that when lifting the damper 3, the damper element 1 remains in the receptacle 2. However, the insertion and removal of the damper element 1 in or out of the receptacle 2 is readily possible due to its elasticity.
  • the damper element 1 is inserted into the receptacle 2 so that the outer surface 13 of the upper portion 10, the inner surface 41 of the top surface 40 contacted, while the closed outer surface 21 of the lower portion 20 protrudes from the receptacle 2.
  • the jacket 31 of the hollow cylindrical portion 30 extends with recorded damper element 1 approximately to the lower end of the upper portion 10 of the damper element.
  • the holder 2 is made of anodised aluminum.
  • a cylindrical receiving part 42 is centrally formed, which extends outwardly and has a through opening 43 with an internal thread 44.
  • the internal thread 44 extends from the outer mouth of the opening 43 partially through the opening 43. Below the internal thread 44, the opening 43 is narrowed, in this section 45 whose inner diameter here corresponds to the core diameter of the internal thread 44.
  • the receptacle 2 stabilized by its jacket 31, the recorded therein damper element 1 in the radial direction. At the same time it distributes the forces to be absorbed uniformly on the damper element 1. In addition, it is avoided by the circumferential jacket 31 that the damper element 1 is pressed radially outward due to the weight of the device. Rather, a bias in the damper element 1 is constructed in the radial direction. This is distributed uniformly in the damper element 1 due to the radial webs 15a, b. In the vertical direction, ie in the direction of the weight load of the device to be damped, the damper element 1 comprises continuous regions, while in the radial directions, which experience no bias by the weight of the device, always recessed Areas are available. Due to the interaction of the receptacle 2 with the damper element 1 and by its structuring, the elastic properties of the damper 3 are adjusted so that they are approximately the same in the operating state (ie loaded damper 3) in the axial and radial directions.
  • damper elements In order to dampen devices of different weight, a set of different damper elements is advantageously provided, and these can always interact with the same recording in principle.
  • the differences in the damper elements are advantageously achieved by the use of different TPE starting materials with different hardnesses, such as by a set of damper elements made of TPE material of hardnesses 17, 24, 35, 45 and 55 Shore A, the usual weights of audio playback devices (including speakers) are covered.
  • different structuring can be provided. However, this requires the production of additional injection molds, which increases the manufacturing cost.
  • FIG. 4 shows a schematic plan view of a second embodiment of a damper element according to the invention.
  • the damper element 101 additionally comprises four cylindrical bores 117.1... 117.4, which are circularly symmetrical about the center of the main plane of the damper element 101 are arranged (ie at a mutual angular distance of 90 °).
  • the holes 117.1 ... 117.4 are arranged so that they are all within the prismatic, blind hole-like recesses 112b. They extend from the outer surface 121 to the bottom of the respective recess 112b.
  • FIG. 5 shows a schematic representation of a cross section through the recorded in a recording of a second embodiment of a damper 103 damper element 101, along the line BB in the FIG. 4 ,
  • the recording 2 is unchanged and has already been linked to the FIG. 3 described in detail.
  • the damper element 101 is also received in the receptacle 2 in an identical manner.
  • a slider plate 150 is now attached to the outer surface 121 of the damper element 101. This is made entirely of nylon. It has a circular bottom 151 of constant cross-section, an upwardly drawn border 152 and four upwardly projecting fastening pins 153. The pins are arranged so that they are aligned with the bores 117.1...
  • the damper element 101 rests on the circular bottom 151 of the slider plate 150 with substantially its entire base area. This ensures a good coupling of the damper element 101 to the footprint.
  • the upwardly drawn border 152 of the slider plate 150 is dimensioned such that it does not touch the upper portion 110 of the damper element 101 even with the damper element loaded to the maximum, so that the slider plate 150 has no significant influence on the damping of the damper 103.
  • the mounting pins 153 take no axial forces.
  • the slider plate 150 can be fixed or removed depending on the application. In addition to its sliding properties, it ensures that it is not affected by the material of the damper element 101 on sensitive surfaces.
  • FIG. 6 shows a schematic plan view of a third embodiment of an inventive damper with recorded damper elements
  • FIG. 7 a schematic representation of a cross section through the damper with recorded damper elements along the line CC in the FIG. 6
  • the damper 203 has substantially the shape of a circular plate. It is made of aluminum and has in the edge region six uniformly arranged along the circumference receptacles 202.1 ... 202.6 to accommodate the previously, in connection with the FIGS. 4 and 5 described damper elements 101.
  • the receptacles 202.1... 202.6 are in the form of cylindrical bulges projecting upwards over the plate. Their inner cross section corresponds - except for the missing receiving part of the one in connection with the FIG. 3 above recording.
  • the height of the receptacles 202.1... 202.6 is selected so that the plate surface of the damper 203 with the damper elements 101 inserted is approximately at the level of the transition between the upper and lower sections of the damper element 101, ie the plate is in maximum load Condition of the damper 203 only minimally spaced from the ground.
  • the flat surface between the receptacles 202.1 ... 202.6 can be used as a support surface for legs of a device or musical instrument, in particular a grand piano. Due to the lower support surface of the wing is compared to a direct installation on the ground only minimally raised when using the damper.
  • the dimensions of the damper 203 are chosen in particular so that a conventional double-winged wing foot between the receptacles 202.1 ... 202.6 place.
  • FIG. 8 shows a schematic plan view of a fourth embodiment of an inventive damper with recorded damper element
  • FIG. 9 a schematic representation of a cross section through the damper with recorded damper element along the line DD in the FIG. 8
  • the damper 303 is made of aluminum and again has substantially the shape of a circular plate. However, it now has only a single receptacle 302 in the form of a circular ring, for receiving a correspondingly shaped damper element 301.
  • the damper element 301 thus has essentially the shape of a straight prismatic circular ring. It comprises an upper annular portion 310 and a for upper portion 310 coaxial lower cylindrical portion 320, whose radial extent relative to the upper portion 310 is reduced.
  • the radial extent of the upper portion 310 is 43 mm for a damper element suitable for damping a wing, and the diameter of the lower portion 320 is 35 mm.
  • the height of the upper portion 310 is 10 mm, that of the lower portion 320 is 3 mm.
  • the damper element 301 is manufactured in one piece and homogeneously in an injection molding process from a foamed thermoplastic elastomer based on olefin (TPE-O), for example from the material Santoprene® 201-45 commercially available from the company Exxon Mobile, which contains 3% by weight of a foaming process commercial propellant were added.
  • TPE-O foamed thermoplastic elastomer based on olefin
  • the hardness of the starting material is 45 Shore A.
  • the blind-hole-like recesses 312a, 312b wherein the recesses have substantially the shape of an isosceles trapezium.
  • the recesses account for approximately 37% of the area. Due to the fact that the lower portion 320, which forms the contact surface with the footprint, does not extend to the outer circumferential ridge 314a, in the transmission of the forces to be derived, a distribution of the same necessarily takes place over the circumferential and radial ridges. A direct transfer of forces acting in the edge region of the damper element 301 forces on the footprint is prevented. Due to the circular symmetrical shape of the damper element, an angle-independent transmission of the forces to be derived is achieved.
  • the receptacle 302 for the damper element 301 is again designed as a bulge projecting upwards over the plate.
  • the heights of the receptacle 302 and the damper element 301 are in turn selected so that the plate surface of the damper 303 comes to rest with the damper element 301 inserted approximately at the height of the transition between the upper and the lower portion of the damper element 301, d. H. the plate is only minimally spaced from the ground in the maximum loaded state of the damper 303.
  • the region of the damper surface located within the receptacle 302 can, as described above, be used as a support surface for legs of a device or musical instrument, in particular a grand piano.
  • annular - slide plate 350 is attached on the underside of the damper element 301 in turn a - this time annular - slide plate 350 is attached.
  • the slider plate 350 is again detachable, so that the damper 303 can be used with or without the slider plate 350, depending on the background and the desired static friction.
  • the invention is not limited to the illustrated embodiments.
  • the dimensions, the starting material used or the structuring can be chosen differently.
  • the outer surface of the lower portion of the damper element may be provided with a sliding surface, for. B. with a film of polyamide, which is formed during the injection molding process.
  • damper element ie this forms even the actual damper.
  • the invention is not limited to cylindrical damper elements, these may, for. B. also have a square base. They can also be designed over a large area, for example such that they essentially extend over a base of the device to be damped.
  • a damper element is created by the invention, which is simple in construction and durable and which allows a sonically advantageous damping of the device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Vibration Prevention Devices (AREA)

Claims (17)

  1. Élément amortisseur (1) pour un amortisseur (3) destiné à être monté entre un appareil de la technique de sonorisation ou de l'électronique de divertissement, notamment un appareil de reproduction audio ou un instrument de musique, et une surface de pose, l'élément amortisseur (1) possédant une structure (11) avec plusieurs zones (12a... 12c) espacées à la section transversale réduite, caractérisé en ce que l'élément amortisseur est réalisé d'un seul tenant en une matière plastique élastique et il est configuré de telle sorte que lorsque l'élément amortisseur est chargé, une première constante de ressort dans la direction axiale, laquelle correspond à une direction de mise en charge maximale, et une deuxième constante de ressort dans une direction radiale perpendiculaire à la direction axiale, se différencient au maximum de 30 % et en ce que les plusieurs zones (12a... 12c) espacées sont disposées de telle sorte que plusieurs éléments jointifs circonférentiels (14a... 14c) sont formés, lesquels sont reliés ensemble par plusieurs éléments jointifs (15a, 15b) sensiblement radiaux.
  2. Élément amortisseur selon la revendication 1, caractérisé en ce que la première constante de ressort et la deuxième constante de ressort se différencient au maximum de 20 %.
  3. Élément amortisseur selon la revendication 1 ou 2, caractérisé en ce qu'il est fabriqué à partir d'un élastomère thermoplastique (TPE), notamment à partir d'un élastomère thermoplastique à base d'oléfine (TPE-O).
  4. Élément amortisseur selon l'une des revendications 1 à 3, caractérisé en ce qu'il est fabriqué à partir d'une matière plastique expansée.
  5. Élément amortisseur selon l'une des revendications 1 à 4, caractérisé en ce qu'une dureté de la matière utilisée est comprise dans la plage de 10 à 70 Shore A, de préférence de 15 à 55 Shore A.
  6. Élément amortisseur selon l'une des revendications 1 à 5, caractérisé en ce qu'un rapport entre une dilatation maximale de l'élément amortisseur et une hauteur de l'élément amortisseur est comprise dans la plage de 2,25 à 5,5, de préférence de 2,75 à 4,0.
  7. Élément amortisseur selon l'une des revendications 1 à 6, caractérisé en ce qu'il possède une première surface principale (21) continue, alors qu'une deuxième surface principale (13), qui se trouve à l'opposé de la première surface principale (21), est pourvue de plusieurs cavités (12a... 12c) espacées de type trous borgnes.
  8. Élément amortisseur selon l'une des revendications 1 à 7, caractérisé en ce qu'il possède une forme cylindrique circulaire et la structure (11) formée par les éléments jointifs circonférentiels et radiaux (14a... 14c, 15a, 15b) présente une symétrie rotationnelle, la symétrie rotationnelle étant de préférence au moins en six parties, notamment de préférence au moins en huit parties.
  9. Élément amortisseur selon l'une des revendications 1 à 8, caractérisé en ce que les cavités (12a... 12c) sont configurées de telle sorte qu'une surface totale des cavités (12a... 12c) représente 15 à 50 %, de préférence 25 à 40 % d'une surface totale de la deuxième surface principale (13).
  10. Élément amortisseur selon l'une des revendications 1 à 9, caractérisé en ce qu'une surface de glissement est formée sur la première surface principale (21) continue.
  11. Élément amortisseur selon la revendication 10, caractérisé en ce qu'il est fabriqué par un procédé de moulage par injection et un morceau de matériau ayant des propriétés de glissement est façonné sur la première surface principale (21) en tant que surface de glissement.
  12. Amortisseur destiné à être monté entre un appareil de la technique de sonorisation ou de l'électronique de divertissement, notamment un appareil de reproduction audio ou un instrument de musique, et une surface de pose, comprenant un élément amortisseur (1) selon l'une des revendications 1 à 11.
  13. Amortisseur selon la revendication 12, comprenant en outre un logement (2) pour l'élément amortisseur (1), lequel est configuré de telle sorte qu'il entoure de manière adaptée une surface d'enveloppe de l'élément amortisseur (1) accueilli.
  14. Amortisseur selon la revendication 13, caractérisé en ce que le logement (2) comporte une ouverture taraudée (43) destinée à accueillir une vis de fixation ou un adaptateur de fixation.
  15. Amortisseur selon l'une des revendications 12 à 14, caractérisé en ce que le logement comporte une surface porteuse pour l'appareil ou l'instrument de musique, la surface porteuse, lorsque l'élément amortisseur est accueilli, étant plus basse que la deuxième surface principale de l'élément amortisseur.
  16. Amortisseur selon la revendication 15, caractérisé en ce que le logement comporte une zone extérieure, destinée à accueillir l'élément amortisseur ou plusieurs éléments amortisseurs, et une zone intérieure abaissée servant à former la surface porteuse.
  17. Amortisseur selon l'une des revendications 12 à 16, caractérisé par une plaque de glissement qui peut être fixée sur la première surface principale (21) continue de l'élément amortisseur.
EP09775796.7A 2008-10-13 2009-10-08 Élément atténuateur Active EP2335423B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH16212008A CH699714A2 (de) 2008-10-13 2008-10-13 Dämpferelement.
PCT/CH2009/000323 WO2010043059A1 (fr) 2008-10-13 2009-10-08 Élément atténuateur

Publications (2)

Publication Number Publication Date
EP2335423A1 EP2335423A1 (fr) 2011-06-22
EP2335423B1 true EP2335423B1 (fr) 2018-03-14

Family

ID=41786070

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09775796.7A Active EP2335423B1 (fr) 2008-10-13 2009-10-08 Élément atténuateur

Country Status (3)

Country Link
EP (1) EP2335423B1 (fr)
CH (1) CH699714A2 (fr)
WO (1) WO2010043059A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH711620A1 (en) * 2015-10-08 2017-04-13 Rohrer Christian Damper.
JP6565959B2 (ja) * 2017-03-07 2019-08-28 ヤマハ株式会社 電子機器用支持脚及び電子機器
CN114866886B (zh) * 2022-04-06 2023-03-28 荣耀终端有限公司 一种电子设备

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770560A (en) * 1971-10-21 1973-11-06 American Cyanamid Co Composite laminate with a thin, perforated outer layer and cavitated bonded backing member
US4493471A (en) * 1983-02-14 1985-01-15 Mcinnis Donald E Sound speaker stand for attenuating vibrations
US5804776A (en) * 1997-05-22 1998-09-08 Bizlewicz; F. Peter Vibratory energy dissipation
DE19824445B4 (de) * 1998-05-30 2006-02-16 Calenberg Ingenieure, planmäßig elastisch lagern GmbH Elastomerlager
US6427965B1 (en) * 2000-11-28 2002-08-06 Mccracken Ronald G. Shock and vibration damping pad and system
US7222823B2 (en) * 2004-07-06 2007-05-29 Ata Engineering, Inc. Payload adapter

Also Published As

Publication number Publication date
WO2010043059A1 (fr) 2010-04-22
EP2335423A1 (fr) 2011-06-22
CH699714A2 (de) 2010-04-15

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