Acoustics – Sound-modifying means – Housing or enclosure
Reexamination Certificate
2000-07-26
2001-11-27
Dang, Khanh (Department: 2837)
Acoustics
Sound-modifying means
Housing or enclosure
C381S306000, C055S385200
Reexamination Certificate
active
06321869
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a speaker system for personal computers and, more particularly, to a speaker system for such computers designed to filter and clean contaminated air of a limited working space around the computer in addition to anionizing the air.
2. Description of the Prior Art
As well known to those skilled in the art, desktop personal computers have been widely used in houses and offices for performing communications, word processing or games. Such desktop personal computers are not designed to be easily portable and typically have somewhat large volumes and heavy weight, and so they have to be installed on desks having limited areas and spaces and force users to use them at fixed places within limited working spaces different from portable computers, such as laptop computers or palmtop computers.
The construction of a conventional desktop computer is shown in FIG.
1
. As shown in the drawing, the conventional desktop computer
1
comprises a main body
2
, which is fabricated with a CPU, a hard disc drive and a floppy disc drive set within a casing. A monitor
3
is electrically connected to the main body
2
and displays images on its screen under the control of the CPU. A keyboard
4
, used as an input instrument for the computer, is electrically connected to the main body
2
. The computer
1
also typically has a speaker system
5
, which consists of at least one speaker and amplifies audio signals output from the main body
2
and generates sounds in response to the audio signals.
Nowadays, such a personal computer
1
has been designed to have multimedia functions and is operated in conjunction with a variety of peripheral instruments, such as a mouse and a printer. Particularly, the main body
2
of the computer
1
is provided with a variety of electronic devices capable of allowing the computer
1
to perform desired multifunctional operations. Therefore, it is necessary to more highly integrate the electronic devices for such computers
1
.
Recently, in accordance with a quick and high development of the information society, such personal computers
1
are more widely and preferably used day by day. In addition, the Internet communication allows people to quickly and easily perform information interchange, and so the necessity of such computers has been rapidly increased. At any rate, a variety of new businesses, forcing people to use such personal computers
1
, have been developed day by day, and so most modern day people inevitably consume a great amount of time in operating such computers
1
.
When a user operates a personal computer
1
for a lengthy period of time within limited working space having a problem of bad ventilation, the surrounding air may be contaminated with smoke and germs and may suffer a lack of oxygen, and gives ill effect to the user's health. It is thus necessary to overcome such a problem experienced while operating computers within such limited working space for a lengthy period of time.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a speaker system for personal computers, which is designed to suck contaminated air from limited working space and to filter off impurities from the air using an air filter, thus cleaning the contaminated air, and also has an anionizer designed to anionize the filtered air, thus preparing anionized clean air to a user of a computer and effectively preventing a user's health from being ill-affected by such contaminated air.
Another object of the present invention is to provide a speaker system for personal computers, of which the audio signal amplifying chip is mounted to a cathode plate of the anionizer, with the cathode plate being capable of desirably absorbing heat using a high voltage, and which effectively cools the audio signal amplifying chip and minimizes the resistance value of the chip caused by an undesirable heat dissipation from the chip, thus being finally improved in its tone quality.
In order to accomplish the above objects, the present invention provides a speaker system for personal computers, comprising at least one speaker amplifying audio signals, output from a personal computer, to predetermined levels and stereophonically dividing the amplified audio signals, and outputting sounds having an audio frequency. A power supply unit supplies electric power for the speaker while converting and rectifying an input AC voltage into a desired level of DC voltage. The speaker system also has a speaker power switch, which is provided on the cabinet of the speaker for turning on or off the electric power for the speaker so as to selectively activate the speaker or for controlling output sound volume of the speaker. A drive fan is installed within the speaker and is rotated at a predetermined rpm when the speaker is turned on. This drive fan thus generates sucking force for forcibly sucking atmospheric air into the speaker. An anionizer is mounted on a printed circuit board within the speaker and is used for generating anions from its anionizing plate, which consists of an anode plate and a cathode plate individually generating a high voltage. An anionizer power switch is provided on the speaker for turning on or off the anionizer. The speaker system further comprises an air filter, which is installed around the drive fan within the speaker so as to filter off impurities from the sucked atmospheric air.
REFERENCES:
patent: 4811403 (1989-03-01), Henricksen et al.
patent: 5213595 (1993-05-01), Kim
patent: 5446793 (1995-08-01), Piccaluga et al.
Abelman ,Frayne & Schwab
Dang Khanh
Il Sung International Co., Ltd.
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