1. An integrated multi yoke for use in a loudspeaker having at least two loudspeaker drivers, comprising: a body having at least two recesses each for receiving a loudspeaker driver; and a partition common to each recess.

2. The yoke as set forth in claim 1, wherein said body has an I shaped configuration in cross section.

3. The yoke as set forth in claim 1, wherein said body has an S shaped configuration in cross section.

4. The yoke as set forth in claim 1, wherein said body has a cross shaped configuration in cross section.

5. A loudspeaker, comprising: an enclosure; a plurality of individual loudspeaker drivers including a diaphragm, spider, frame, top plate and magnet, said individual loudspeaker drivers being mounted adjacent one another within said enclosure; and an integrated multi yoke commonly connected to each of said individual loudspeaker drivers.

6. The loudspeaker as set forth in claim 5, wherein said yoke has a body, said body having an I shaped configuration.

7. The loudspeaker as set forth in claim 5, wherein said yoke has a body, said body having an S shaped configuration in cross section.

8. The loudspeaker as set forth in claim 5, wherein said yoke has a body, said body having a cross shaped configuration in cross section.

9. The loudspeaker as set forth in claim 5, wherein said individual loudspeaker drivers are connected in phase.

10. The loudspeaker as set forth in claim 5, wherein said loudspeaker is multiple polar.

11. The loudspeaker as set forth in claim 5, wherein said loudspeaker drivers are selected from the group consisting of cone, dome and horn type.

12. A bi-polar loudspeaker, comprising: an enclosure; a plurality of individual loudspeaker drivers including a diaphragm, frame and top plate, said individual loudspeaker drivers being mounted adjacent one another within said enclosure; and a cylindrical magnet, a ring magnet and a yoke commonly connected to each of said individual loudspeaker drivers.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a loudspeaker system and more particularly to a new yoke configuration that provides improved magnetic field strength as well as a higher sound pressure level.

BACKGROUND OF THE INVENTION

[0002] Modern audio video equipment such as LCD TV, Plasma TV, and wall mounted DVD players are becoming increasingly thinner in dimension. This influences the development of loudspeaker systems with the objective to be as thin as possible or as small as possible for the enclosure size, while retaining high quality sound.

[0003] To produce a good sound quality of the loudspeaker driver, appropriate loudspeaker parameters are required. One parameter is a high magnetic field strength (B) at the magnetic gap of the driver motor system. The benefit of a higher magnetic field strength (B) is higher sound pressure level (SPL).

[0004] Separate bi-polar loudspeakers are known to improve sound dispersion. The system uses two drivers assembled back-to-back and connected in phase. Although effective, the system tends to be bulky and inappropriate for modern thin audio video equipment.

[0005] By using the invented integrated multi yoke structure, the size problem maybe mitigated. The integrated multi yoke structure may be used in bi-polar, tri-polar, quadro-polar, penta-polar or hexa-polar loudspeaker systems. The advantage of this system is both wider sound dispersion and higher magnetic field strength (B) in a smaller loudspeaker enclosure size. This invention is applicable for television loudspeakers, high fidelity loudspeakers, car loudspeakers, multimedia loudspeakers, ceiling loudspeakers, sub-woofers, cone type, dome type, and horn type drivers among others.

SUMMARY OF THE INVENTION

[0006] One object of one embodiment of the present invention is to provide a loudspeaker driver motor system for combining and driving two or more loudspeakers, with an integrated yoke structure for providing a path for the magnetic field of each driver.

[0007] A further object of one embodiment of the present invention is to provide an integrated multi yoke for use in a loudspeaker having at least two loudspeaker drivers, comprising: a body having at least two recesses each for receiving a loudspeaker driver; and a partition common to each recess. The modified yoke results in a loudspeaker having a wider sound dispersion and higher magnetic field strength (B) in a smaller loudspeaker enclosure size. Compared to conventional bi-polar loudspeakers, which having the same specification, the present technology provides a smaller loudspeaker enclosure and has a higher SPL.

[0008] A further object of one embodiment of the present invention is to provide a loudspeaker, comprising: an enclosure; a plurality of individual loudspeaker drivers including a diaphragm, spider, frame, top plate and magnet, the individual loudspeaker drivers being mounted adjacent one another within the enclosure; and a yoke commonly connected to each of the individual loudspeaker drivers.

[0009] Another object of one embodiment of the present invention is to provide a loudspeaker driver motor system for combining and driving two loudspeakers, comprising: a cylindrical magnet, a ring magnet at the outer of said cylindrical magnet, a yoke structure of a non magnetic material to align both magnets on a common axis, a plate system that consists of a ring and a disk covering both sides of both magnets. Using this invented motor system for a bi-polar loudspeaker system can produce a higher magnetic field strength (B) and wider sound dispersion in a smaller loudspeaker enclosure.

[0010] A further object of one embodiment of the present invention is to provide a smaller bi-polar loudspeaker system with a high SPL, comprising: an enclosure; two loudspeaker drivers including a diaphragm, spider, frame, top plate; the individual loudspeaker drivers being mounted adjacent one another within the enclosure; a ring magnet, a cylindrical magnet and a yoke commonly connected to each of the individual loudspeaker drivers. Compared to conventional separate bi-polar loudspeakers, that have similar electrical specification, the present invention provides the smallest loudspeaker enclosure with a higher SPL.

[0011] A still further object of one embodiment of the present invention is to provide a method for elevating the sound pressure level of a loudspeaker, comprising: providing a loudspeaker enclosure having a plurality of individual loudspeaker drivers; providing a yoke mounted within the enclosure commonly connected to each of the individual loudspeaker drivers for symmetrizing the magnetic fields generated from the drivers to increase the strength of the magnetic fields; and passing a signal through the drivers under a stronger magnetic field resulting from the symmetrized fields whereby the sound pressure level is elevated.

[0012] Having thus generally described the invention, reference will now be made to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is a cross-sectional view of the prior art system having a separate bi-polar loudspeaker and incorporating two drivers assembled back-to-back, with a U-yoke;

[0014] FIG. 2a is a cross-sectional view of one embodiment of the present invention in a bi-polar loudspeaker with an I-Yoke configuration;

[0015] FIG. 2b is an exploded view of FIG. 2a;

[0016] FIGS. 3a through 3c are schematic illustrations of the plurality of pole geometries of I-Yoke configuration;

[0017] FIG. 4 is a cross-section of a prior art bi-polar loudspeaker using two driver mounted adjacent one another using U-yoke;

[0018] FIG. 5a is a cross-sectional view of a further embodiment of the present invention in a bi-polar loudspeaker with S-yoke configuration;

[0019] FIG. 5b is an exploded view of FIG. 5a;

[0020] FIG. 6 is a cross-sectional view of a loudspeaker system with an integrated multi U-yoke with three yokes, according to one embodiment of the present invention;

[0021] FIG. 7 is a cross-sectional view of a loudspeaker system having an integrated multi U-yoke with four yokes, according to a further embodiment of the present invention;

[0022] FIG. 8 is a perspective view of a loudspeaker system having an integrated multi U-yoke with five yokes, according to one embodiment of the present invention;

[0023] FIG. 9 is a perspective view of a loudspeaker system having an integrated multi U-yoke with six yokes, according to one embodiment of the present invention;

[0024] FIG. 10 is a cross-sectional view of a loudspeaker system having an integrated multi U-yoke with three yokes where two are used for mid-bass driver and the remainder for the tweeter driver;

[0025] FIG. 11 is a cross-sectional view of a loudspeaker system having an integrated multi U-yoke with four yokes;

[0026] FIG. 12 is a cross-sectional view of a loudspeaker system having an integrated I-Yoke configuration according to one embodiment of the present invention using a separate tweeter driver assembly in the same loudspeaker enclosure;

[0027] FIG. 13 is a cross-sectional view of a loudspeaker system having an integrated I-Yoke configuration according to one embodiment of the present invention using a separate tweeter driver and separate midrange driver assembly in the same loudspeaker enclosure;

[0028] FIG. 14 is a cross-sectional view of a loudspeaker system having an integrated four U-yoke configuration according to one embodiment of the present invention using a separate dynamic reflection 4.pi. steradian omni-directional tweeter assembly in the same loudspeaker enclosure;

[0029] FIG. 15 is a cross-sectional view of a prior art assembly of a separate bi-polar loudspeaker using two drivers assembled back-to-back and using T-yoke configuration;

[0030] FIG. 16a is a cross-sectional view of one embodiment of the present invention illustrating a bi-polar loudspeaker with a cross-yoke configuration;

[0031] FIG. 16b is an exploded view of FIG. 16a;

[0032] FIGS. 17a through 17c are schematic illustrations of the plurality of pole geometries of a cross-yoke configuration;

[0033] FIG. 18 is a cross-sectional view of another prior art assembly of a separate bi-polar loudspeaker, using two drivers assembled side by side and back-to-back using a T-yoke configuration;

[0034] FIG. 19a is a cross-sectional view of a bi-polar loudspeaker with T-yoke configuration and top-plate combination configuration according to a further embodiment of the present invention;

[0035] FIG. 19b is an exploded view of FIG. 19a;

[0036] FIG. 20 is a cross-sectional view of a loudspeaker system having an integrated cross-yoke configuration according to one embodiment of the present invention using a separate tweeter driver assembled in the same loudspeaker enclosure;

[0037] FIG. 21 is a cross-sectional view of a loudspeaker system having an integrated cross-yoke configuration according to one embodiment of the present invention using a separate tweeter driver and midrange driver assembly in the same loudspeaker enclosure;

[0038] FIG. 22 is a cross-sectional view of a loudspeaker system having an integrated T-yoke configuration & plate combination configuration, assembled with a separate tweeter driver in the same loudspeaker enclosure; and

[0039] FIG. 23a is a cross-sectional view of the invented bipolar loudspeaker system having a ring magnet, a cylindrical magnet and a yoke commonly connected to each of said individual loudspeaker drivers.

[0040] FIG. 23b is an exploded view of FIG. 23a.

[0041] FIG. 24 is a graphical representation of a frequency response measurement comparison between the prior art bi-polar loudspeaker using T-yoke and cross-yoke configuration according to the present invention.

DETAIL DESCRIPTION OF THE PREFERRED EMBODIMENTS

自入道以来，工作中只要认真对待问题没什么解决不了的，个人认为只要全情投入没什么难的问题，在经历漫长电声这一块专业中，过去数年在接手专案基本上我是没遇过什么难题，只要认真分析每一个细节结合原理就能解决，各位可以一试。