Patent Application
20110286613
There are many audio speaker designs directed to optimize various parameters such as size, versatility, power consumption and ease of use.
It is a purpose of this invention to provide a more refined trade off between audio fidelity and size as well as ease of use and versatility in the context of an aesthetically pleasing speaker tower.
It is a related purpose of this invention to provide these optimized trade-offs in a device that has reasonable cost to meaningfully obtain these objectives.
The embodiment disclosed constitutes three modules stacked on one another to form a tower. The first or base module is a speaker that generates a magneto-static signal which is coupled to the surface on which this base module is supported thereby providing audio radiation from that support surface. The second or intermediate module permits use of a storage device card input and contains a rechargeable battery to permit wire free operation. The top module has an upwardly facing cone speaker that provides audio radiation in a higher frequency range than is provided by the base module. The result is a combined audio radiation that provides enhanced audio radiation for the size of the device.
These three modules are held together by embedded magnets on facing surfaces of the modules. This magnetic holding arrangement provides for ease and simplicity of assembly and disassemble of the modules while providing sufficient structural security so that the modules remain in place during use.
This arrangement permits use of (a) the bottom speaker by itself or (b) the combination of the bottom and intermediate modules to add a storage card playing function and to provide battery wire free operation in addition to the main speaker or (c) the three modules to provide in addition an enhanced sound by use of the higher frequency radiation from the top module.
There are a series of connectors for carrying signals and power between adjacent modules. A recess in the center of the upwardly facing surface of each module carries a set of upwardly extending spring loaded connectors. These connectors mate with flat connectors on the adjacent face of the adjacent module. A wall around the flat connectors extends down into the recess of the mating module. The wall is keyed to assure the proper orientation of the connectors when assembling the modules.
A magneto-strictive driver terminates in a plate which acts as a support foot that extends out from the bottom surface of the base module. This foot provides audio coupling to a support surface on which the module is placed causing the support surface to become the audio radiating element. A cone speaker for the top module is at the top surface of the module. The audio signals from the top and bottom modules complement each other in frequency profile and also provide a favorably even distribution of the output audio sound.
The drawings are of a single embodiment. The device 10 has a base module 12, a center module 14 and an upper module 16. These modules are releasably held together by magnets 18 which are imbedded near the sides of the facing surfaces of the modules. The base module 12 can receive an audio signal input either through a line coupled to the terminal 20 or through connections with the center module 14. The lower module 12 receives an input audio signal, amplifies the audio signal and magneto-strictively couples the amplified audio to a support plate 22. This plate 22 is used as a foot on which the device 10 stands. The plate 22 therefore couples its mechanical output signal to the surface on which it is standing and thus causes the surface to become the audio radiating element. Audio radiation from that surface combines with the audio radiation of the higher audio frequency signal from the upper module 16 to provide a full frequency audio signal.
The coupling of the magneto-strictive driven foot 22 to the surface on which it is standing provides a radiated audio signal from the surface with a greater low frequency range than would a cone loudspeaker of the same diameter.
The center module 14 may have a slot (not shown) to play an audio storage card. The module 14 has a holder (not shown) for a rechargeable battery which is coupled to the lower and upper modules12, 16 so that this combined speaker device 10 can be played without being connected to any external electric power source.
The top module 16 has an upwardly facing cone loudspeaker 25 having a higher audio frequency response than does the base module. Its lower frequency response is limited by the width of the cone speaker 25.
The terminal structure of the electrical terminals between the lower and middle modules 12, 14 and that between the middle module 14 and the top module 16 is essentially identical and thus only one of these terminal structures need be explained. This terminal structure is shown in
The upwardly facing surface 32 of the base module 12 has a well 34. At the bottom of the well 34 are a series of upwardly extending spring loaded electrical terminals 36. The downwardly extending wall 28 of the face 26 fits into the well 34 of the other engaging face 32.
When the modules 12, 14 are assembled, the spring loaded terminals 36 contact the adjacent flat terminals 30 and are pushed back against the spring enough so that electrical engagement between terminals is made. This structure requires that the terminals 36 extend up slightly beyond the surface 32 so that they can retract when contacted by the terminals 30. This structure also requires that the wall 28 be short enough that it does not touch the base of the well 34 when assembled.
Magnets 18 embedded above the module surface 26 and below the module surface 32 are positioned so that when the modules are assembled, the magnets are brought close to one another. The magnets have opposite polarities so that they hold the modules together. The strength of the magnets 18 are selected to permit manual separation of the modules while maintaining structural stability of the assembly 10.
The design permits the base module 12 to be used by itself to produce an audio signal although that audio signal is of a restricted frequency band width compared to the signal available when the upper module higher frequency signal is included. The design also permits use of the lower module 12 and middle module 14 together so that an audio card can be played through the base module 12 and also so that a battery (not shown) in the middle module 14 can be used to provide the power to generate the output of the lower module 12 and thus provide a wire free option. Further the design permits use of the base and upper modules 12 and 16 together, modified to provide either battery power in one of those modules or external power.
The combined use of (a) the high frequency cone speaker facing up from the top module and (b) the magneto-strictive driven foot to generate audio signals from the surface on which the device rests provides a sound quality comparable to that of a larger device. The multi-module separable design using magnets to hold the modules together permits ready separation for use of only the base module when desired. This combination of features provides flexibility in use with a quality sound in a device small enough to be readily portable.
The disclosure herein relates to a currently preferred embodiment. It will be apparent to those skilled in the art that variations can be made without departing from the teachings of the invention and the appropriate scope of the claims.
For example, one embodiment of this invention is a device 10 having approximately the following dimensions. It is slightly over 125 mm high, with a side to opposite side width of approximately 62 mm. The height of the modules are 53 mm for the base module 12 and 32 mm for the mid module 14 and 35 mm for the top module 16. The cone speaker 25 has a driver diameter of about 35 mm. The foot 22 has a diameter of 35 mm and extends 5 mm below the module 12.
As another example, the magneto-strictive transducer could be replaced by a solenoid or other electro-mechanical transducer.
Furthermore the placement of the battery can be varied to permit operation of a combined bottom and top module without an external power source. In any case, a two module design that incorporates the top module 16 and bottom module 12, modified to incorporate power and signal input, could be designed to reflect the teaching of this invention.
It should also be recognized that a receiver could be placed in a module to permit wireless receipt of an audio modulated carrier. In general, the location of the signal receiver, the amplifiers, the power source and other required or useful electronics can be selected to provide a desired utility
This application is a continuation-in-part of U.S. Design Pat. application No. 29/362,342 filed on 24 May 2010 of which the entire disclosure is incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 29362342 | May 2010 | US |
| Child | 12886785 | US |
