Loudspeaker apparatus

#This Non-provisional application claims priority under 35 U.S.C. §119(a) on Patent Application No(s). 200510068838.5 filed in China, P.R.C. on May 12, 2005, the entire contents of which are hereby incorporated by reference.

#1. Field of Invention

#The present invention relates to loudspeaker apparatus and particularly to a loudspeaker that has an enhanced chamber located in front of a speaker unit.

#The invention will become more fully understood from the detailed description given in the illustration below only, and thus is not limitative of the present invention, wherein:

#FIG. 1 is a schematic view of a conventional loudspeaker.

#FIG. 2 is a schematic view of a first embodiment of the loudspeaker apparatus of the invention.

#Refer to FIGS. 2 and 3, a first embodiment of the loudspeaker apparatus of the invention is shown. The present invention of loudspeaker apparatus mainly includes a speaker unit 10 and a front cover 20. The speaker unit 10 may be formed in many different types. In the first embodiment, a conical shape like of the conventional speaker is used as example. In practice the speaker unit 10 contains many other elements, such as a diaphragm 110, a magnetic member 130, a voice coil 140, dampers 120 and the like shown in FIG. 1. Those elements are known in the art, thus are not depicted in the drawings of the embodiments discussed below. Also, they are included in the speaker unit 10 and are generally referred to in the speaker unit 10.

#The speaker unit 10 can receive external electronic signals to generate acoustic waves and change its high-and-low sound pitch and volume according to variations of the electronic signals. The front cover 20 is located on a front side of the speaker unit 10, namely on one side where the acoustic waves are generated, and the front cover 20 includes a plurality of elastic spacers 21 and a diaphragm 22. The elastic spacers 21 are coupled with the diaphragm 22 to form a closed enhanced chamber 23 on the front side of the speaker unit 10. The diaphragm 22 may be made from paper, polyester film or the like. In addition, for enhancing the sound generation effect, the surface of the diaphragm 22 may be coated with metal by vaporization. On the other hand, the elastic spacers 21 may have many selections, such as rubber, a sponge, or the like. It may be formed in a desired dimension or according to a selected specification to facilitate replacement and the purpose of the elastic spacers 2lmainly aims to hold the diaphragm 22 and form the enhanced chamber 23.

#After the speaker unit 10 generates acoustic wave, the acoustic wave moves in the enhanced chamber 23 and drives the diaphragm 22. The diaphragm 22 generates vibration and sends out another acoustic wave, or secondary acoustic wave. After transmitted in the enhanced chamber 23 to the diaphragm 22, the acoustic wave generated by the speaker unit 10 has an improved sound quality and becomes louder, and also eliminates the broken sound occurred to the conventional speaker. In test results, the embodiment show that the loudspeaker apparatus of the invention can boost the sound volume gain many times.