JPS61121244A - Outer case for flat type display device - Google Patents

Abstract

PURPOSE:To prevent fall of side wall to the inside and cracks on the outer case when said outer case is exhausted by providing a plurality of ribs to the side walls provided between the rear plate and front plate in order to surround the circumference. CONSTITUTION:An external case 1 encasing an electrode structure 8 for display device is formed by sealing the front plate 5 having the side wall providing a plurality of ribs at the external circumference and the rear plate 2 arranged in parallel to said front plate by welding the peripheral materials 3 consisting of a continuous metal member 7 fixed to the side wall 4 and a continuous metal member 6 fixed to the rear plate 2 at the end portion 5a, 7a. Therefore since the peripheral member 3 is flexible when exhausted, the side wall 4 can be prevented from falling into the side of outer case 1 due to the atmospheric pressure applied on the side wall 4, owing to the ribs 9. Accordingly, crack of outer case 1 can be prevented and reduction in weight can be realized through formation of a thin side wall 4.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an enclosure for a flat panel display, and more particularly to an evacuable enclosure thereof.

2. Description of the Related Art Conventionally, an envelope for a flat panel display device is shown in FIGS. 8 and 9, for example.
The structure is as shown in Fig. 10.

In FIG. 8, an envelope 81 has a back plate 82 formed of a metal plate, and in FIG. Board 9
5, and in FIG. 10, the envelope 101 is composed of a peripheral member 103 having a welded portion 102, a first continuous metal member 104 and a second continuous metal member 105 surrounding the outer periphery of the envelope 101. It is formed. In FIGS. 8 to 10, the electrode structures B3.96 and 106 are connected to the envelope 81°9.
1 and 101 are evacuated, the structure supports the back plates 82.92 and 107 and the front plates 84.97 and 108 against atmospheric pressure.

Problems to be Solved by the Invention The back plate 82 in FIG. 8, the back plate 92 in FIG.
The peripheral member 103 shown is flexible and the side wall 85.9
8 and 109, when the inside of the outer enclosures g381.91 and 101 is evacuated, cracks occur due to the cantilever action of the atmospheric pressure acting on the side walls 86.98 and 109.

The present invention is intended to prevent cracking due to the cantilever action of atmospheric pressure acting on the side wall.

Means for Solving the Problems A technical means of the present invention for solving the above problems is to provide a plurality of ribs on at least one of the outer peripheral surface and the inner peripheral surface of the side wall.

action The effect of this technical means is as follows.

By providing a plurality of ribs on at least one of the outer circumferential surface and inner circumferential surface of the side wall of the envelope, when the inside of the envelope is evacuated, atmospheric pressure acts on the side wall, causing the side wall to close. This prevents the container from falling into the container and prevents the outer container from cracking.

Embodiment One embodiment of the present invention will be explained below based on the accompanying drawings.

FIG. 1 shows an external view of an embodiment of the present invention, and FIG. 2 shows a sectional view of an embodiment of the invention. The envelope 1 is formed from a back plate 2, a peripheral member 3, a side wall 4, and a front plate 6. The peripheral member 3 is formed from a first continuous metal member 6 and a second continuous member 7 surrounding the outer periphery of the envelope 1.
A continuous metal member 6 is fixed to the back plate 2, and a second continuous metal member 7 is fixed to the side wall. And each end 6 of the first continuous metal member 6 and the second continuous metal member 7
By welding a and 71a, the envelope 1 is sealed. When the inside of the envelope 1 is exhausted from an exhaust pipe (not shown), the electrode assembly 8 is structured to support the back plate 2 and the front plate 5 against atmospheric pressure. Further, a plurality of ribs 9 are provided on the outer peripheral surface of the side wall 4. When the inside of the envelope 1 is evacuated, since the peripheral member 3 is flexible, atmospheric pressure acts on the side wall 4, causing the side wall 4 to collapse into the inside of the envelope 1.
II+ <.

The ribs 9 reinforce the side wall 4 so that it does not collapse inward when this force is applied, and prevent the envelope 1 from cracking. Further, by providing the ribs 9, the thickness of the side wall 4 can be reduced, and the weight of the envelope 1 can be reduced.

Next, other embodiments of the present invention will be described.

FIGS. 3, 4, 5, 6, and 7 show ribs with different shapes.

In FIG. 3, the rib 31 has a triangular shape. FIGS. 4 and 6 show the lower portions of the ribs 41 and 51 with the outer peripheral edges 1Q in FIG. 1 removed. In FIGS. 6 and 7, the ribs 61 and 1 are the front plates 62 and 7.
It is provided so as to extend inward from the end of 2.

The ribs may be provided not only on the outer peripheral surface of the side wall but also on the inner peripheral surface of the side wall. However, ribs may be provided on both the outer circumferential surface and the inner circumferential surface of the side wall. Further, the shape of the rib may be other than the shape shown in the embodiments of the present invention. When forming the ribs, the ribs may not only be formed integrally with the side walls and the front plate, but may also be separately produced and fixed using a known method.

Further, the shape of the envelope is not limited to that shown in FIG. 1, and it is effective to provide ribs for any kind of envelope.

Effects of the Invention The present invention provides ribs on the side walls of an envelope for flat panel display devices, and when the inside of the envelope is evacuated, atmospheric pressure acts on the side walls, causing the side walls to close to the envelope. This prevents the container from falling inside and prevents the envelope from cracking. Further, by providing the ribs, the thickness of the side wall can be reduced, so that the weight of the envelope can be reduced.

[Brief explanation of drawings]

FIG. 1 is an external view of an envelope for a flat panel display device according to an embodiment of the present invention, FIG. 2 is a sectional view of the envelope for a flat panel display device,
Figures 3, 4, 5, and 6. FIG. 7 is a sectional view of an enclosure for a flat panel display according to another embodiment of the present invention, and FIGS. 8, 9, and 10 are sectional views of a conventional enclosure a& for a flat panel display. be. 1...Envelope, 2...Back plate, 3...
... Peripheral members, 4 ... Side walls, 5 ...
Front plate, 9...ribs. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure Moe 7

Claims (1)

[Claims] A back plate and a front plate arranged substantially parallel to each other at intervals, a side wall surrounding the outer periphery between the back plate and the front plate, and at least one of the back plate, the front plate, and the side wall. The electrode structure is partially made of metal and is located between the back plate and the front plate to support the back plate and the front plate against atmospheric pressure, and An envelope for a flat panel display device, characterized in that a plurality of ribs are provided on at least one side.