Supports: cabinet structure – Television type
Reexamination Certificate
2001-06-12
2003-12-16
Hansen, James O. (Department: 3637)
Supports: cabinet structure
Television type
Reexamination Certificate
active
06663198
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to a television cabinet, and more particularly to a television cabinet of a structure which is divided into a front cabinet and a rear cabinet.
2. Related Art
In a television cabinet of this kind, for example, if a front cabinet and a rear cabinet are aligned, a bore portion of a boss provided on the front cabinet side is coincident with a vis insertion hole provided on the rear cabinet side, and if an attaching vis inserted from the back side into the vis insertion hole of the rear cabinet is screwed into the bore portion of the boss for the front cabinet and fastened, the front cabinet and the rear cabinet can be joined integrally via the attaching vis. The term “vis” as used in the present specification means fastening screw. One example of the front cabinet in such television cabinet is shown in FIG.
4
.
FIG. 4
is a rear view of the front cabinet for use with the television cabinet of video integral type, as looked from the back side. As seen in the same figure, this front cabinet is provided with the boss
5
inside an upper board portion
12
of the outer board, the attaching vis being screwed into this boss
5
. Reference numeral
13
denotes a cathode ray tube attaching boss, and reference numeral
14
denotes an opening in which a front face of the cathode ray tube is disposed.
FIGS. 5
to
7
show the conventional structure of a formation portion A of the boss
5
as shown in FIG.
4
.
FIG. 5
is a front view of the boss formation portion A,
FIG. 6
is a cross-sectional view of
FIG. 5
, taken along the arrow VI—VI, and
FIG. 7
is a perspective view of
FIG. 5
, as looked along the arrow VII. As seen from these figures, the upper board portion
12
of the outer board
11
is provided with a pair of platelike leg pieces
61
,
61
on the right and left sides which are moulded integrally therewith, both lateral sections of the cylindrical boss
5
on the right and left sides extending longitudinally being linked integrally with the pair of leg pieces
61
,
61
, respectively. And a rear end portion
51
of the boss
5
is linked via a leg piece
61
on one side to the platelike rib
7
extending lengthways that is moulded integrally with the upper board portion
12
. This rib
7
not only serves to reinforce the upper board portion
12
, but also reinforce the boss
5
and the leg pieces
61
supporting the boss
5
.
Conventionally, this rib
7
had the same thickness at any position over its entire length, as seen from FIG.
7
. Also, an entry corner portion
71
as a link portion of the rib
7
with the rear end portion
51
of the boss
5
had a right angled shape.
By the way, the television cabinet is required to be strong enough to withstand a shock caused by vibrations or impact during the transportation or a stacking load. Therefore, a drop test for the television set employing the cabinet is conducted in accordance with certain standards, in which it is required to increase the reinforcing action with the rib
7
to have a greater strength to withstand this drop test. To cope with this requirement, an attempt was made to increase the thickness of the rib
7
.
FIGS. 8
to
10
show the structure of a boss formation portion A of
FIG. 4
made by this attempt.
FIG. 8
is a front view of the boss formation portion A,
FIG. 9
is a cross-sectional view of
FIG. 8
, taken along the arrow IX—IX, and
FIG. 10
is a perspective view of
FIG. 8
, taken along the arrow X. As seen from
FIGS. 9 and 10
, in this attempt, the total height or thickness of the rib
7
was increased in an intermediate portion of the rib
7
extending longitudinally and between the link portions with the leg pieces
61
, and a high strength portion
72
was formed by the thickened portion. In this way, the rib
7
having the high strength portion
72
of increased thickness could exhibit a greater strength to withstand a drop test or screwing of an attaching vis into the boss. However, it was found that when the rib
7
was thickened in such a way, a so-called “shrinkage” arose on the surface i (see
FIG. 9
) of the upper board portion
12
where the high strength portion
72
was formed due to the problems on the moulding techniques, thereby degrading the appearance of the cabinet. Also, it was found that a crack or fissure was likely to occur in the entry corner portion
71
as the link portion of the high strength portion
72
with a rear end portion of the boss
5
.
On the other hand, it was considered that a thin rib was provided to each of the right and left leg pieces
61
,
61
to increase the reinforcing action. However, it is difficult to provide two ribs in proximity from the respect of moulding techniques, and even if it can be made, there is the disadvantage that the moulding or manufacturing costs may be increased.
Though the boss formation portion A as shown in
FIG. 4
is provided with two bosses
5
,
5
arranged right and left, this was contrived to employ a spare boss
5
when one boss
5
failed. Accordingly, one boss
5
may be provided in most cases.
On the other hand, there were described some measures for increasing the strength of attaching a cathode ray tube attaching boss into a cathode ray tube as shown in
FIG. 4
in the Unexamined Japanese Utility Model Application Publication Nos. Sho62-201583, Sho63-72978, and Sho63-81474.
[Problems that the Invention is to Solve]
As described above and shown in
FIGS. 8
to
10
, if the conventional television cabinet has simply an increased thickness of the rib
7
to improve the reinforcing action, the “shrinkage” may arise on the surface of the upper outer board
12
on which the rib
7
is provided, degrading the appearance of the cabinet, resulting in the problem that the merchandize quality is lowered. Also, with the techniques as described in the above patents, it is impossible to resolve the insufficient strength of the rib
7
or solve the problem that the “shrinkage” may arise on the surface of the upper outer board
12
on which the rib
7
is provided.
SUMMARY OF THE INVENTION
This invention achieves in the light of the above-mentioned problems or affairs, and it is an object of the invention to provide a television cabinet employing a simple constitution with the increased thickness of the rib
7
to improve the reinforcing action of the rib
7
, in which the “shrinkage” may not arise owing to the increased thickness of the rib on the surface of a front cabinet or a rear cabinet on which the rib is provided.
Also, it is another object of this invention to provide a television cabinet in which a crack or fissure is unlikely to occur in the entry corner portion as the link portion of the rib with the rear end portion of the boss.
[Means for Solving the Problem]
A television cabinet of this invention is divided into a front cabinet and a rear cabinet. A platelike rib extending lengthways that is moulded integrally with an outer board of the front cabinet or rear cabinet made of synthetic resin is linked with a rear end portion of a boss for screwing an attaching vis for joining the front cabinet and the rear cabinet. And the rib has a high strength portion of increased thickness extending lengthways to be continuous to the rear end portion of the boss, and a link portion of the rib with the outer board is formed in smaller thickness over an entire length than the high strength portion.
Thereby, the reinforcing action of the rib is increased by the high strength portion of the rib. Nevertheless, the link portion of the rib with the outer board is formed in smaller thickness than the high strength portion, whereby the thickness of the link portion can be set to such an extent that the “shrinkage” may not arise on the surface of the outer board.
In the television cabinet of this invention, it is desirable that the surface of a front end portion of the high strength portion is formed as a concave curved face smoothly continuous to the rear end face of the boss. Thereby, since a stress is more concentrated on an entry corn
Funai Electric Co. Ltd.
Hansen James O.
Rosenthal & Osha L.L.P.
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