Speaker having middle-high sound speakers

Details Speaker having middle-high sound speakers Speaker having middle-high sound speakers

1998-11-03

2001-04-24

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

C381S186000, C381S335000, C381S338000, C381S342000, C181S144000, C181S199000

Reexamination Certificate

active

06222929

ABSTRACT:

CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of Korean Application No. 97-57637, filed Nov. 3, 1997, in the Korean Patent Office, the disclosure of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a speaker and, more particularly, to a speaker in which a middle-high frequency speaker is disposed in front of a low frequency speaker and a sound guiding member is disposed behind the low frequency speaker and in front of the middle-high sound speaker improving low frequency sound while lowering noise and distortion.
2. Description of the Related Art
Generally, a speaker converts an electrical signal into a sound wave signal and radiates a sound wave through free space. That is, an electric current flows through a voice coil disposed in a strong magnetic field, generally a magnet, so as to generate a force causing a vibrating plate to vibrate radiating the sound wave.
FIG. 1
is a cross-sectional diagram of a conventional speaker. In general, a conventional speaker includes a vibrating plate
11
(also known as a “cone
11
) attached to a frame
10
, a bobbin
12
, a voice coil
13
inside the frame
10
, a damper
14
disposed between the frame
10
and the bobbin
12
, an upper plate
15
, a magnet
16
, and a polepiece
17
disposed behind the frame
10
. The voice coil
13
is wound on the outer side of the cylindrical-shaped bobbin
12
and moves integrally with the bobbin
12
. The bobbin
12
, is connected at a front end thereof, with a lower side of the vibrating plate
11
and is supported by the elastic damper
14
. The polepiece
17
is disposed at a predetermined distance from the inner side of the bobbin
12
. The region between the polepiece
17
and the upper plate
15
receives the magnetic field from the magnet
16
.
The bobbin
12
vibrates axially, by the Fleming's left hand law, when current passes through the voice coil
13
. The vibration of the bobbin causes the vibrating plate
11
, disposed forward of the bobbin
12
, to vibrate thereby radiating sound waves through free space. Since a speaker can not reproduce all ranges of sound, it is necessary to provide a tweeter for high sound, a squawker for middle sound, and a woofer for low sound to obtain the highest quality sound. However, the size of a cabinet to accommodate all three speakers, must, by necessity, be quite large, increasing the costs of the speaker.
SUMMARY OF THE INVENTION
The present invention has as an object to provide a speaker apparatus which can reproduce all ranges of sound such as low, middle, and high frequency sound in a small cabinet.
It is another object of the present invention to provide a speaker apparatus which can make sound more clear and stereophonic by reducing the distortion or noise due to the collision of sound.
In order to achieve the objects of the invention, a speaker apparatus according to the present invention includes: a yoke having a path arranged at the rear side of a woofer for low sound; a sound guiding member disposed in the yoke for guiding sound discharged through the path; a tweeter for reproducing middle to high frequency sound disposed at the front end of the sound guiding member; a partition wall disposed at the edge of the tweeter for separating the middle-high frequency sound from the low frequency sound radiated from the woofer; and a sound guiding member disposed at the central portion of the tweeter.
As described above, in a speaker apparatus according to the present invention, the tweeter is disposed at the front side of the woofer. To improve low frequency sound, the low frequency sound radiated toward the rear direction of the woofer is passed through the sound guiding member disposed within the yoke minimizing the collision with the turbulent flow generated from the rear sound and reducing noise and the distortion of sound. Middle-high frequency sound radiated from the tweeter is radiated and separated from the low frequency sound radiated from the woofer by a partition wall and at the same time guided by a sound guiding member disposed in front of the woofer to improve ambience and stereophonic quality.


REFERENCES:
patent: 2295527 (1942-09-01), Bowley
patent: 4492826 (1985-01-01), Chiu
patent: 4811406 (1989-03-01), Kawachi
patent: 4837839 (1989-06-01), Andrews

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