JPH05347741A - Projection television - Google Patents

Abstract

PURPOSE:To decrease the number of parts, to improve the workability and to cut the stray light. CONSTITUTION:A sheet metal 3 which is oblong in the width direction of a cabinet top plate 2 is fixed to this plate 2 via a screw 4. A sheet metal engagement groove 1a and a light shielding part 1b are formed in a body at a screen frame 1 where a screen 5 is fixed. Then the metal 3 is put into the groove 1a and therefore the frame 1 and then the screen 5 are fixed to the plate 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection television, and more particularly to a screen frame mounting structure for fixing a screen.

[0002]

2. Description of the Related Art In recent years, projection televisions have been known in which an image is projected on a screen from a projection light source such as a CRT using a projection lens.

FIG. 5 is a schematic perspective view of this projection television. In the figure, reference numeral 101 is a television cabinet, and the three CRTs (not shown), a reflector (not shown), and the like are housed inside the television cabinet 101. Further, reference numeral 102 in the drawing is a screen,
The screen 102 is fitted and fixed in a screen frame 103. The screen frame 103 is the top plate portion 101a of the TV cabinet 101.
The screen 102 is configured to be attached to the television cabinet 101 by being hooked on the.

FIG. 6 is an enlarged view showing this mounting structure.
A top plate warp prevention member 104 for preventing the warp of the top plate is fixed to the lower surface of the front end (right end in the figure) of the cabinet top plate 101a, and a plurality of cabinet side hooks are attached to the lower surface of the top plate warp prevention member 104. The sheet metal 105 is fixed with screws 106 with a predetermined gap. On the other hand, on the left side of the screen frame 103 in the drawing, the hook side hook metal plate 1 is provided.
The frame side hook metal plate 108 is fixed to a position corresponding to 05 by a screw 109. The screen 102 is fixed to the screen frame 103. The screen frame 103 is supported by the cabinet top plate 101a by engaging the cabinet side hook sheet metal 105 and the frame side hook sheet metal 108.

[0005]

However, in the structure described above, the top plate warp prevention member is used,
Furthermore, two hook sheet metals must be prepared, one for the cabinet side and the other for the frame side. Moreover, since a plurality of hook sheet metals are used for each, the number of parts is increased and the manufacturing becomes complicated. There is a problem. Further, in the conventional structure, the stray light r (see FIG. 6) that reflects the cabinet top plate and the hook side hook metal plate is reflected on the screen, and the image may be blurred.

The present invention has been made in view of the above problems, and provides a projection television capable of reducing the number of parts, improving workability, and reducing the influence of reflected stray light. The purpose is to

[0007]

According to the present invention, in a projection television in which a screen frame having a screen fixed to the front surface of a cabinet is attached, a top plate of the cabinet is provided with a metal plate for hooks formed long in the width direction. The screen frame is fixed and integrally formed with a sheet metal engaging groove capable of engaging the sheet metal, and a light shielding portion for preventing reflected light that reflects the cabinet top plate or the sheet metal from being projected on the screen. It is characterized by being.

[0008]

The sheet metal engaging groove formed in the screen frame to which the screen is fixed is inserted into and engaged with the sheet metal for the hook that is long in the width direction and is fixed to the cabinet top plate. This secures the screen frame to the cabinet.
In addition, since the screen frame is provided with a light-shielding portion, stray light reflected by the cabinet top plate or the like is shielded by this light-shielding portion, so that stray light does not appear on the screen and the image is prevented from being blurred. be able to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a screen frame used in a projection television according to the present invention. The screen frame 1 includes a hook portion A and a screen mounting portion B. FIG. 2 is a partial cross-sectional view of the hook portion A. A sheet metal engaging groove 1a for inserting and engaging the sheet metal is formed in the hook portion A. In addition, the light-shielding portion 1 so that it can project inward (downward in the figure) of the cabinet.
b is formed. The sheet metal engaging groove 1a and the light shielding portion 1b are integrally formed with the main body of the screen frame 1 by an extrusion molding method.

FIG. 3 is a view showing a state where the screen frame is attached to the cabinet top plate. A hook sheet metal 3 is fixed to the lower surface of the cabinet top plate 2 on the front end side (right end side in the drawing) by screws 4. Where this hook metal plate 3
As shown in FIG. 4, it is formed so as to be long in the width direction of the cabinet top plate 2 and also has the function of preventing the cabinet top plate 2 from warping. On the side of the frame mounting portion B of the screen frame 1, the screen 5 is fixed to the screen frame 1 by the screen pressing plate 6 fixed to the screen frame 1.

In such a structure, the screen frame 1 is supported by the cabinet top plate 2 and the screen 5 is attached to the cabinet by inserting the hook metal plate 3 into the metal plate engaging groove 1a of the screen frame 1. Becomes In this way screen frame 1
By integrally forming the sheet metal engaging groove 1a on the screen, the sheet metal on the screen frame 1 side becomes unnecessary, and the hook sheet metal 3 is formed to be long in the width direction of the cabinet top plate 2.
Since the warp prevention member is unnecessary and only one hook metal plate is required, the number of parts can be reduced and the workability can be improved. On the other hand, so-called stray light r that reflects the cabinet top plate 2 or the hook metal plate 3 and is incident on the screen 5 can be blocked by the light blocking portion 1b, and the image can be made clear. Further, when the screen frame 1 is hooked, the hook portion cannot be seen by the operator, but if the light shielding portion 1b is moved while being in contact with the hook sheet metal 3, the light shielding portion 1b serves as a guide. The hook metal plate 3 naturally catches on the metal plate engaging groove 1a of the screen frame 1, and the workability is improved.

[0012]

According to the present invention, since the sheet metal engaging groove is integrally formed with the screen frame to which the screen is fixed as described above, the number of parts can be reduced. Further, since the hook metal plate is formed to be long in the width direction of the cabinet top plate, a member for preventing the warp of the cabinet top plate is unnecessary, and in this respect also, the number of parts can be reduced. Further, since the light-shielding portion is integrally formed with the screen frame, the effect of the reflected light from the cabinet top plate can be reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a screen frame used in a projection television according to the present invention.

FIG. 2 is a partially enlarged view of a portion A in FIG.

FIG. 3 is a state diagram in which a screen frame is attached to a cabinet top plate.

FIG. 4 is a perspective view showing a state where a hook metal plate is fixed to a cabinet top plate.

FIG. 5 is a schematic perspective view of a projection television.

FIG. 6 is a cross-sectional view showing a conventional structure for mounting a screen frame on a television cabinet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Screen frame 1a ... Sheet metal engaging groove 1b ... Light-shielding part 2 ... Cabinet top plate 3 ... Hook sheet metal (sheet metal) 5 ... Screen

Claims (1)

[Claims] 1. A projection television in which a screen frame having a screen fixed to a front surface of a cabinet is mounted, and a hook metal plate elongated in the width direction is fixed to a top plate of the cabinet, and the screen frame is attached to the screen frame. A sheet metal engaging groove capable of engaging the sheet metal, and a light shielding portion for preventing reflected light that reflects the cabinet top plate or the sheet metal from being projected on the screen are integrally formed. Projection television.