Electronic appliance with loudspeaker unit

Details Electronic appliance with loudspeaker unit Electronic appliance with loudspeaker unit

2000-01-28

2001-04-17

Le, Huyen (Department: 2743)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Mounting or support feature of housed loudspeaker

C381S345000, C381S386000, C381S333000

Reexamination Certificate

active

06219430

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a loudspeaker unit of an electronic appliance, such as a computer, more particularly to a computer having a loudspeaker unit with enhanced low frequency characteristics.
2. Description of the Related Art
Referring to
FIGS. 1 and 2
, a conventional portable computer is shown to comprise a computer housing
2
having a lower housing part
20
with a side wall
200
that is formed with a perforated sound port
201
. A loudspeaker unit
1
includes a loudspeaker enclosure
10
having a loudspeaker mechanism
11
mounted therein. The loudspeaker enclosure
10
is mounted in the computer housing
2
between an upper housing part
21
and the lower housing part
20
adjacent to the side wall
200
with the use of a screw fastener
210
such that the loudspeaker mechanism
11
is registered with the sound port
201
.
The quality of the sound output generated by the loudspeaker unit
1
is affected by the size of the loudspeaker enclosure
10
. In view of the current trend to make the size of the computer housing
2
as small as possible to enhance portability, the size of the loudspeaker enclosure
10
is accordingly reduced, thereby resulting in an adverse effect on the output sound quality. There is thus a need to improve the quality of the sound output of a loudspeaker unit of a computer without necessitating an increase in the size of the computer housing.
SUMMARY OF THE INVENTION
Therefore, the object of the present invention is to provide an electronic appliance, such as a computer, having a loudspeaker unit with enhanced low frequency characteristics without requiring an increase in the size of the housing of the electronic appliance.
According to the present invention, an electronic appliance comprises a housing, a loudspeaker unit and a connector unit.
The housing includes a lower housing part having a base wall and a side wall that extends upwardly from the base wall. The side wall is formed with a perforated sound port and a connector mounting opening that extends upwardly from the base wall and that has a first vertical edge adjacent to the perforated sound port and a second vertical edge opposite to the first vertical edge in a longitudinal direction of the side wall. The lower housing part further has a barrier wall that extends upwardly from the base wall. The barrier wall has a first barrier portion that extends from the second vertical edge of the connector mounting opening in a transverse direction relative to the longitudinal direction, and a second barrier portion that extends from the first barrier portion in the longitudinal direction. The second barrier portion is disposed parallel to the side wall and is registered with the connector mounting opening in the transverse direction. The barrier wall is formed with a terminal hole. The base wall, the side wall and the barrier wall cooperatively form a connector receiving space thereamong.
The loudspeaker unit includes a loudspeaker enclosure and a loudspeaker mechanism mounted in the loudspeaker enclosure. The loudspeaker enclosure is mounted in the lower housing part adjacent to the side wall such that the loudspeaker mechanism is registered with the sound port. The loudspeaker unit further has an elongated resonance duct that extends from one side of the loudspeaker enclosure in the longitudinal direction toward the first barrier portion and into the connector receiving space and that is disposed immediately above the base wall. The resonance duct is communicated acoustically with the loudspeaker enclosure, and has a vertical height that is shorter than that of the loudspeaker enclosure. The resonance duct is formed with a low frequency sound hole.
The connector unit is disposed in the connector receiving space on top of the resonance duct and between the loudspeaker enclosure and the first barrier portion. The connector unit has a terminal set that extends through the terminal hole in the barrier wall.


REFERENCES:
patent: 4926487 (1990-05-01), Yoshida et al.
patent: 5400408 (1995-03-01), Lunggren et al.

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