Supports: cabinet structure – Television type
Reexamination Certificate
2001-04-17
2003-03-25
Hansen, James O. (Department: 3637)
Supports: cabinet structure
Television type
Reexamination Certificate
active
06536855
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a front cabinet and a television set, which comprise a front wall with an opening for keeping a picture screen on front side of a picture tube at a position facing to outside, and which can fasten and fix the picture tube on a fixing unit on backside of the front wall.
2. Description of the Prior Art
As a conventional type front cabinet of a television set, a front cabinet as disclosed in JP-A-10-271415 is known.
In this front cabinet, there is provided an opening of approximately rectangular shape for keeping a picture screen of a picture tube at a position facing to outside. The depth dimension of peripheral portion of the opening is adjusted to closely follow the frontal shape of the picture tube so that it can be bent and deformed when the picture tube is fixed on it. The adjustment amount of bending and deformation at the center on lower edge of the opening is set to a value higher than the adjustment amount of bending and deformation at the center of the other three sides. With the arrangement as described above, in case a large type picture tube with curved picture screen is mounted, it is possible to eliminate a gap between peripheral portions of the opening and peripheral edges of the picture screen when these are closely fitted to each other.
In the conventional type front cabinet as described above, no consideration is given on the case where a picture tube with a flat picture screen is mounted. Also, when the picture tube is manufactured, deviations are very likely occur in the position of the fixing unit for fixing the picture screen to the front cabinet and in the position of the picture screen itself. For this reason, a gap may occur between peripheral portions of the opening and peripheral edges of the picture screen when the picture tube is fixed on the front cabinet.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a front cabinet and a television set, by which it is possible to closely fit peripheral portions of an opening and peripheral edges of a picture screen even when a picture tube with a flat picture screen is mounted.
First, a television set with a front cabinet according to the present invention comprises
a picture tube having a flat picture screen on front side;
a front cabinet made of synthetic resin which comprises
a front wall with an opening in approximately rectangular shape and for keeping the picture screen at a position facing to outside,
side walls, an upper wall and a lower wall, being extended toward backside so as to enclose peripheral edges of the front wall,
a screw-retaining boss for fixing the picture tube by screw is formed at each of four corners on backside of the front wall,
ribs closely fitted to the picture screen are projected toward backside of the front opening of the front wall,
thin-wall portions, being provided on backside of the front wall surface between linear portions of said ribs and peripheral edge of the front wall and having thinnest-wall portions in approximately rectangular shape and tilted portions in which thickness gradually reduced to said thinnest-wall portion; and
a rear cabinet, made of synthetic resin and in approximately box shape, to be assembled by bringing an opening thereof face-to-face to an opening formed by the side walls, the upper wall and the lower wall of said front cabinet, wherein
the thin-wall portions are designed in such manner that, when the screws are fastened, the front wall is bent toward the picture screen in association with the movement of the screw-retaining boss toward the picture screen and the ribs are closely fitted to the picture screen.
Further, the front cabinet made of synthetic resin according to the present invention comprises a front wall with an opening for keeping a picture screen on front side of a picture tube at a position facing to outside, and for fastening and fixing the picture tube to a fixing unit on backside of the front wall, wherein there are provided thin-wall portions on peripheral portions of the opening so that, when the picture tube is fastened and fixed, peripheral portions of the opening are bent toward the picture screen of the picture tube and peripheral portions of the opening are closely fitted to edges of the picture screen of the picture tube.
In the present invention with the arrangement as described above, in the assembling procedure, a worker keeps the picture screen on front side of the picture tube at a position opposite to the opening and facing to outside. Then, the picture tube is fastened and fixed to a fixing unit on backside of the front wall. Then, peripheral portions of the opening are bent toward the picture screen. This is because the front cabinet is made of synthetic resin and the peripheral portions of the opening are designed as easily bendable by providing thin-wall portions with thickness thinner than the thickness of the other portions.
As a result, the peripheral portions of the opening are bent toward the picture screen and are closely fitted to edges of the picture screen. This eliminates the possibility that gap may occur between the peripheral portions of the opening and the peripheral edges of the picture screen due to deviations caused at the time of manufacture of the picture tube.
Also, when the picture screen is flat, it is difficult to deform the front wall to follow the shape of the picture screen as the picture tube is fastened and fixed. With the arrangement as described in the present invention, it is possible to easily eliminate the gap between peripheral portions of the opening and peripheral edges of the picture screen even when the picture screen has flat shape. However, the fixing of the picture tube with a flat picture screen is merely an application example of the present invention, and the present invention is also applicable to the case where the picture tube with curved picture screen is fixed.
As described above, the present invention can provide a front cabinet and a television set, in which it is possible to closely fit peripheral portions of the opening to peripheral edges of the picture screen even when the picture tube with a flat picture screen is mounted.
The fixing unit as described above may be of any type so far as it is formed on backside of the front wall and is used to fasten and fix the picture tube. As an arrangement example, according to another aspect of the present invention, the fixing unit is provided with screw-retaining boss erected from the front wall toward backside.
In the invention with the arrangement as described above, the picture tube is fastened and fixed using screws to the screw-retaining boss erected from the front wall toward backside. In this case, when the screws are fastened and a screw fastening allowance between the picture tube and the screw-retaining boss is used up, the screw-retaining boss is gradually moved toward the picture tube. Then, the peripheral portions of the opening are bent toward the picture screen, and the peripheral portions of the opening are closely fitted to peripheral edges of the picture screen.
As described above, it is possible according to the present invention to provide a simple arrangement to fasten and fix the picture tube by screws.
The thin-wall portion as described above may be of any type so far as it is formed on peripheral portion of the opening. As an example of the position of the thin-wall portion, according to another aspect of the present invention, both the picture screen of the picture tube and the opening are designed in approximately rectangular shape. The fixing unit may be designed in such manner that each of the corners of the picture screen is fastened and fixed, and the thin-wall portions may be provided near peripheral edges of the opening.
In the invention with the arrangement as described above, when each of the corners of the picture screen is fastened and fixed on the fixing unit while keeping the picture screen at a position facing to the opening of approxi
Crowell & Moring LLP
Funai Electric Co. Ltd.
Hansen James O.
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