Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Mounting or support feature of housed loudspeaker
Reexamination Certificate
1999-12-17
2004-07-06
Kuntz, Curtis (Department: 2643)
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Mounting or support feature of housed loudspeaker
C381S333000, C381S386000, C381S395000, C361S689000, C361S807000, C181S199000, C181S198000
Reexamination Certificate
active
06760460
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a speaker system for a display, and more particularly, to a speaker system for a display, of which structure is modified for providing a high tone quality and low howling.
2. Background of the Related Art
In general, the display, such as a computer monitor, having a built-in speaker system provides the speaker system in a space between an outside wall of a Braun tube and an inside wall of a cabinet enclosing the Braun tube, a width of which fixes a width of the speaker system. And, the width of the speaker system fixes a short diameter of the speaker in the speaker system, and serves as a parameter for fixing a ratio of a long diameter to the short diameter. The ratio of the long diameter to the short diameter of the speaker gives a great influence to a tone quality of the speaker; if other conditions are the same, the speaker system is the most favorable for implementing a high tone quality when the ratio is 1:1. That is, the closer a geometry of a gasket and cone paper of the speaker to a true circle, the favorable for implementing a high tone quality.
A related art speaker system for a display will be explained with reference to FIGS.
1
~
5
.
FIG. 1
illustrates a disassembled perspective view of a related art speaker system for a display,
FIG. 2
illustrates a section across line I—I in
FIG. 1
, and
FIG. 3
illustrates a section of an assembled speaker system in FIG.
1
.
FIG. 4
illustrates a section across line II—II, and
FIG. 5
illustrates a front view of a related art display, schematically.
Referring to FIGS.
1
~
2
, a related art track type speaker system for a display is provided with a track type speaker
100
a
(called as “speaker” hereafter), a front cover
6
mounted on a front face of the speaker
100
a
, and a rear cover
2
mounted on a rear of the speaker
100
a
. The speaker
100
a
is provided with a frame
600
, a gasket
102
, an edge
103
fitted to an inside surface of the gasket
102
for forming a ring, and a cone paper
104
fitted to an inside surface of the edge
103
to form a cone. The frame
600
has a screw hole
601
at each corner. The front cover
6
of a rectangular form in overall has an ecliptic opening
602
on a central portion for passing a sonic wave, a gasket fitting surface
603
and a rear cover fitting surface
604
, both at the rear face. There are bosses
605
(called as “speaker fastening boss” hereafter) each having a screw hole for a speaker fastening screw
701
and bosses
606
(called as “rear cover fastening boss” hereafter) each having a screw hole for a rear cover fastening screw
702
, both on an inside surface of a back of the front cover
6
, and a portion
608
for a pass through hole on top and bottom of the front cover
6
for a screw
703
to be coupled to a screw hole
404
in a speaker system fastening boss
403
on the cabinet
4
to pass through. As shown in
FIG. 4
, the rear cover fitting surface
604
is formed further rear of the gasket fitting surface
603
. And, the rear cover
2
has a form of an empty box in overall for enhancing resonance, is provided with screw holes
206
for fastening to the rear cover fastening bosses
606
formed on the front cover
606
and guide grooves
207
for guiding screws to the screw holes
206
, on both sides thereof. And, the cabinet
4
having the speaker system including the speaker
100
a
, the front cover
6
and the rear cover
2
mounted thereon is provided with a plurality of sonic wave discharge holes
402
for discharging the sonic wave during operation of the speaker, and a boss
403
for fastening the speaker system for fastening an assembled speaker system to the cabinet
4
by screw fastening with the front cover
6
(see FIG.
3
).
The process for assembling the related art speaker system will be explained.
Under a condition that the speaker fastening bosses
605
on the front cover
6
and the screw holes
601
at four corners of the frame
600
of the speaker
100
a
are matched, the speaker fastening screws
701
are fastened through the screw fastening holes
601
for assembling the front cover
6
and the speaker
100
a
together. According to this, a gasket contact surface
603
of the front cover
6
and the gasket
102
on the speaker
100
a
comes into a close contact, to prevent a loss of a sound pressure of a sound directed forward coming from a leakage of a sound directed backward. After the front cover
6
and the speaker
100
a
are jointed, the rear cover fastening screws
702
are fastened through the screw holes
206
for assembling the front cover
6
and the rear cover
2
together under a condition the rear cover fastening bosses
606
on the front cover
6
and the screw holes
206
in the rear cover
2
are matched. Then, the screws
703
are screwed into the speaker system fastening bosses
403
through pass through holes
609
under a state the speaker system fastening bosses
403
on the cabinet
4
and the pass through holes
609
in the portions
608
for pass through holes in the front cover
6
are matched, for fastening the speaker system on the cabinet
4
.
However, the related art speaker system applied to a display has the following problems caused by limitation of a structure.
The related art speaker system for a display requires the complicated shaped front cover
6
with a plurality of bosses
605
and
606
as a medium for fastening the speaker
100
a
to the rear cover
2
which serves as a resonance box. The front cover
6
is required without fail as medium means for mounting the related art speaker system to the cabinet
4
, for providing the portions
608
for pass through holes on the front cover
6
. Therefore, the related art speaker system is disadvantageous in that many components which have complicated shape are required, not only to cost much, but also to drop a productivity in fabrication and assembly of the components. The requirements for the complicate shaped front cover
6
in the related art leads to require for many components and fastening members in assembly of the components as many. Due to this, the related art speaker system has many cost push factors, difficulties in fabrication of the components, and is required many assembly man power in an assembly line. Particularly, a gap(“A” in
FIG. 4
) required between an inside surface of the outside wall of the front cover
6
and the outside surface of the speaker
100
a
affects to a design and material cost. That is, the gap(“A” in
FIG. 4
) between the inside surface of the outside wall of the front cover
6
and the outside surface of the speaker
100
a
is required in assembly of the front cover
6
with the rear cover
2
without fail, for providing the rear cover fastening bosses
606
for use in assembly of the rear cover
2
on an outside region of the speaker
100
a
. As the gap “A” should be secured between the inside surface of the outside wall of the front cover
6
and the outside surface of the speaker
100
a
due the above reason, a width(“C” in
FIG. 4
) of the front cover
6
becomes larger than a width(“B” in
FIG. 4
) of a speaker frame
600
. More precisely, the width(the same with the width of the rear cover) of the front cover
6
is larger as much as a two times of a thickness of the front cover being added to a value two times of the gap “A” in
FIG. 4
in comparison to a width of the frame
600
. In the meantime, the speaker system should have gaps provided to the inside surface of the cabinet
4
and the outside surface of the Braun tube. According to this, because a gap(“D” in
FIG. 5
) between the inside surface of the cabinet
4
and the outside surface of the Braun tube for placing the speaker system therein also should be the larger as much as a size of the gap(“A” in
FIG. 4
) between the inside surface of the outside wall of the front cover
6
and the outside surface of the speaker
100
a
, as explained before, this affects to the design and cost of the speaker system.
In the meantime, a symbol “F” in
FIG. 5
is a width
Harvey Dionne
Kuntz Curtis
LG Electronics Inc.
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