Supports: cabinet structure – Knockdown or setup type
Reexamination Certificate
2001-01-08
2002-05-28
Wilkens, Janet M. (Department: 3636)
Supports: cabinet structure
Knockdown or setup type
C312S263000
Reexamination Certificate
active
06394563
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a cabinet for acoustic equipment or the like such as a television receiver and a cassette-integrated-type radio (radio-cassette player).
2. Description of the Related Art
FIG. 11
shows a conventional cabinet for a television receiver. This cabinet is divided into a box-shaped front cabinet
1
and a box-shaped rear cabinet
2
, and is formed by fitting a protruding portion
21
provided on an upper side and left and right sides of a front end of the rear cabinet
2
to the inner side of an edge portion of an opening (not shown in the drawing) at a rear end of the front cabinet
1
. For this reason, the protruding portion
21
and the edge portion of the opening overlap with each other at the fitted portion. However, since synthetic resin moldings are used for both the front cabinet
1
and the rear cabinet
2
, and the cabinet also functions as an acoustic box, if the protruding portion
21
is merely fitted as it is to the edge portion of the opening, the fitted portion vibrates depending on the volume of a speaker (not shown) incorporated in the cabinet, and the so-called fluttering sound occurs in consequence of the collision (contact) between the protruding portion and the edge portion of the opening, thereby possibly lowering the sound quality.
Accordingly, as shown in
FIG. 11
, a cushioning material
22
such as a nonwoven fabric is conventionally attached to appropriate portions or the entire portion of the protruding portion on the obverse surface side of the protruding portion
21
. When the protruding portion
21
is fitted to the edge portion of the opening, the cushioning material
22
is placed between the protruding portion
21
and the edge portion
12
of the opening at the fitted portion, as shown in FIG.
12
. Providing this arrangement, even if the fitted portion vibrates, since the protruding portion
21
and the edge portion
12
of the opening are prevented from coming into direct contact with each other by the cushioning material
22
, situation in which the chattering sound occurs in consequence of the collision between the two members is suppressed, and jouncing the fitted portion is also suppressed.
Meanwhile, JP-A-10-59359 discloses that when a case for a vehicle-mounted electronic apparatus is formed by being divided into a lower casing body an upper casing body, a structure prevents from jouncing fitted portion of the two casing bodies. According to this publication, in a state in which one edges of two rectangular holes provided at side panels on the upper casing body side ride over semi-conical projections formed in a juxtaposed manner at two positions on side panels of the lower casing body, the other edges of these rectangular holes are separately retained. In addition, JP-A-55-179093U discloses a cabinet which is formed by fitting a projection provided on a tongue piece at a cover side to a recessed portion formed on side plates of a cabinet body. Further, JP-A-62-172180U discloses a housing for acoustic equipment or the like which is formed by fitting a projection provided on a casing side to a recessed portion provided on a cover side.
However, with the conventional cabinet described with reference to
FIGS. 11 and 12
, since the cushioning material
22
such as the nonwoven fabric is extra required to prevent the chattering sound at the fitted portion between the protruding portion
21
of the rear cabinet
2
and the edge portion
12
of the opening in the front cabinet
1
, the cost increases correspondingly.
In addition, with the structure disclosed in JP-A-10-59359 mentioned above, since subject matter thereof is a casing for vehicle-mounted electronic equipment to which intense vibrations, such as vibrations of vehicle during running or engine vibrations, are transmitted, this publication is merely intended to suppress the jounce in the fitted portion between the lower casing body and the upper casing body as much as possible and to prevent loosening and the like from occurring in the fitted portion even if the vibrations are repeatedly transmitted. As such, no countermeasure is adopted for suppressing the occurrence of fluttering sound required for the cabinet for acoustic equipment or the like. As for the structures disclosed in JP-A-55-179093U and JP-A-62-172180U as well, these publications are merely intended to firmly join the fitted portion of the cabinet or the like, and no countermeasure is adopted for suppressing the occurrence of the aforementioned fluttering sound.
Under the above-described circumstances, the applicant integrally formed projections
23
, as shown in
FIG. 13
for explanation, having rectangular-shape in a front view (hereafter referred to as the “rectangular projections”), the projections
23
arranged at desired intervals at a plurality of positions on the obverse surface of the protruding portion
21
of the rear cabinet
2
side, instead of using the cushioning material
22
such as the nonwoven fabric mentioned above with reference to
FIGS. 11 and 12
. The applicant attempted to form a cabinet by fitting the protruding portion
21
to the inner side of the edge portion of the opening on the rear cabinet side.
FIG. 14
is an enlarged cross-sectional view, taken from the front side, of the fitted portion between the protruding portion
21
and the edge portion
12
of the opening. As shown in the drawing, in this fitted portion, the rectangular projection
23
provided on the protruding portion
21
is placed between the protruding portion
21
and the edge portion
12
of the opening, and whereby a gap
3
is formed between an obverse surface
21
a
of the protruding portion
21
and a rear surface
12
a
of the edge portion
12
of the opening. It was found that when the fitted portion has this structure, even if the fitted portion vibrates due to sound from a speaker, since the contact between the protruding portion
21
and the edge portion
12
of the opening is prevented by virtue of the gap
3
, the occurrence of the fluttering sound in consequence of the collision between the protruding portion
21
and the edge portion
12
of the opening can be suppressed. It was also found that when mutual interval between adjacent ones of the rectangular projections
23
is set to be quite a bit wide, warping deformation such as inward drooping of the edge portion
12
of the opening is difficult to occur, and that an action of suppressing the fluttering sound by virtue of the gap
3
can be demonstrated. However, since a flat top surface
23
a
of the rectangular projection
23
is in surface contact and is superposed with the reverse surface
12
a
of the edge portion
12
of the opening, it was found that relatively large fluttering sound can occur in consequence of the collision between the rectangular projection
23
and the edge portion
12
of the opening.
The invention has been devised in view of the above-described circumstances.
An object of the invention is to provide a cabinet for acoustic equipment or the like which enables to substantially suppress the occurrence of the fluttering sound at the aforementioned fitted portion despite the fact that the cushioning material such as the nonwoven fabric is not required.
Another object of the invention is to provide a cabinet for acoustic equipment or the like in which the jounce is difficult to occur at the aforementioned fitted portion.
Still another object of the invention is to provide a cabinet for acoustic equipment or the like which enables to facilitate an operation of fitting the aforementioned protruding portion to the edge portion of the opening.
SUMMARY OF THE INVENTION
A cabinet for acoustic equipment or the like according to the invention is formed by fitting a protruding portion provided on one of a front cabinet and a rear cabinet to an inner side of an edge portion of an opening on the other of the front cabinet and the rear cabinet.
To facilitate an understanding of explanation, a description will be given of a cabinet in which one cabinet is the re
Crowell & Moring LLP
Funai Electric Co. Ltd.
Wilkens Janet M.
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