WO2012056861A1 - Image display device - Google Patents

Abstract

The image display device according to the present invention includes: a housing formed by joining and fixing a bezel (81) and a back cabinet (82) together; an image display unit (1) housed inside the housing; a protection panel (2) arranged so as to cover the image display surface of the image display unit (1) and having the outer peripheral section thereof sandwiched and held between the opened edge section of the bezel (81) and the outer peripheral edge section of the back cabinet (82); and a loop-shaped gasket (80) provided between the opposing surfaces of the rear-side outer peripheral section of the protection panel (2) and the outer peripheral edge section of the back cabinet (82), the gasket (80) having one or more cavities (80a) in the interior thereof.

Description

Image display device

The present invention relates to an image display apparatus having a waterproof structure.

In the conventional image display apparatus, for example, as shown in FIG. 8, an image display unit (9) having an image display surface (90) is accommodated in a housing (92), and The image display surface (90) is protected by closing the front opening with a transparent glass protection panel (91).

Further, it is proposed that waterproof be achieved by interposing a waterproof sheet, a gasket or the like between the facing surfaces of the front opening of the housing (92) and the protective panel (91) (Patent Document 1).

For example, in an image display apparatus in which a ring-shaped gasket is interposed between the front opening of the housing (92) and the facing surface of the protective panel (91), the housing (92) While pressing the gasket between the protection panels (91), the housing (92) and the gaskets are in close contact with each other, and the protection panel (91) and the gaskets are in contact with each other, to make the housing (92) waterproof. There is.

JP, 2005-309268, A

By the way, in the image display device in which a ring-shaped gasket is interposed between the facing surface of the front opening of the housing (92) and the protection panel (91), a plurality of screws are sufficiently tightened to clamp the gasket. Although it is necessary to strongly press the surface of the gasket to the housing (92) and the protective panel (91) by the elastic repulsive force of the gasket, the elastic repulsive force of the gasket is closer to the fastening portion by screws While acting and being received by the fastening portion, it acts on the housing (92) at a position far from the fastening portion by the screw and is received by the housing (92).

Here, when the case (92) is formed of a synthetic resin, the case (92) is easily deformed by an external force, so at a position far from the fastening portion by screws, the case (92) It will be greatly deformed.
As a result, at a position far from the fastening portion by screws, the pressure bonding force between the gasket and the housing (92) becomes small, and there is a problem that the sealing performance is lowered.

The image display apparatus according to the present invention is
A housing (8) formed by joining and fixing a bezel (81) and a back cabinet (82);
An image display unit (1) housed inside the housing (8);
A gasket (80) made of an elastic material, interposed between the bezel (81) and the back cabinet (82) and extending in a loop shape so as to surround the image display surface (10) of the image display unit (1)
And the gasket (80) has one or more cavities (80a) therein.

FIG. 1 is a perspective view showing the appearance of an image display apparatus according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the image display device. FIG. 3 is an exploded perspective view showing the seal structure of the image display device. FIG. 4 is a cross-sectional view of the seal portion of the image display device. FIG. 5 is an enlarged cross-sectional view of the gasket before compression. FIG. 6 is an enlarged cross-sectional view of the compressed state of the gasket. FIG. 7 is a view showing a bonding process of bonding a protective panel to an image display unit via a bonding layer. FIG. 8 is a longitudinal sectional view of a conventional image display apparatus.

An embodiment of the present invention will be specifically described below with reference to the drawings.
An image display apparatus according to an embodiment of the present invention, as shown in FIG. 1, includes a case (8) formed by joining and fixing a synthetic resin bezel (81) and a back cabinet (82) to each other. The image display surface (10) is visible from the front opening of the body (8).

An image display unit (1) incorporating a liquid crystal display panel having an image display surface (10) is accommodated inside the case (8) as shown in FIG. 2, and the front opening of the case (8) is It is closed by a transparent glass protection panel (2).
The protective panel (2) is formed of tempered glass to a thickness of 2.5 mm to 6 mm.

In addition, as shown in FIG. 4, a bonding layer (3) formed by curing a photocurable resin is provided between the image display surface (10) of the image display unit (1) and the back surface of the protective panel (2). And interspersed without gaps.

As the photocurable resin, for example, an acrylic adhesive resin having an ultraviolet curing property can be used. In this case, as shown in FIG. 7A, after applying a photocurable resin (31) to the surface of the image display unit (1), the protective panel (2) is superimposed on the surface of the photocurable resin (31). . Then, in this state, as shown in FIG. 7B, ultraviolet rays are irradiated from the surface side of the protective panel (2) to cure the photocurable resin (31) (see, for example, WO2009 / 011366).

Thereby, the bonding layer (3) is in close contact with the image display surface (10) of the image display unit (1) and the back surface of the protection panel (2), and the bonding layer (3) is formed on the front surface of the image display unit (1). The protective panel (2) is to be joined via

As shown in FIG. 2 to FIG. 4, a loop-like gasket (80) made of silicone rubber is placed between the opposing surfaces of the back outer periphery of the protective panel (2) and the outer peripheral edge (84) of the back cabinet (82). Is intervened.
Inside the gasket (80), as shown in FIG. 5, a plurality of points dispersed in a plurality of places in an arbitrary cross section orthogonal to the longitudinal direction of the gasket (80) and a plurality of places in the longitudinal direction of the gasket (80) Hollow (80a) is formed.

Then, as shown in FIG. 4, the outer peripheral edge (84) of the back cabinet (82) and the opening edge (83) of the bezel (81) are outside the gasket (80) at the opening edge (83). The back cabinet (82) and the bezel (81) are joined and fixed to each other at a plurality of locations along the longitudinal direction by a plurality of screws (85), and the clamping force of the screws (85) The gasket (80) is strongly clamped.
The tightening force of one screw (85) is set to, for example, 15 kgf · cm.

As a result, as shown in FIG. 6, the gasket (80) is compressed between the protective panel (2) and the back cabinet (82) to be elastically deformed into a flat shape. With this elastic deformation, the plurality of cavities (80a) formed inside the gasket (80) are crushed in the compression direction.
The surface of the gasket (80) is pressed against the inner surface of the back cabinet (82) by the elastic repulsive force of the gasket (80), and is pressed against the back surface of the protection panel (2). High sealability will be obtained between (2).

Also, the protective panel (2) is sandwiched between the back cabinet (82) and the bezel (81) through the gasket (80), and is securely held in the opening of the housing (8).

As shown in FIGS. 2 and 3, a back cover (86) is joined and fixed to the back of the back cabinet (82) through a gasket (88), and a cover (87) is further formed on the back of the back cover (86). Is attached.

In the above-mentioned image display device, since a plurality of cavities (80a) are formed inside the gasket (80), the cavities (80a) become flat when the gasket (80) is compressed by the clamping pressure as shown in FIG. By being crushed in shape, it exerts a flexible elasticity in a wider range than a solid gasket having no cavity (80a).

Therefore, the gasket (80) exhibits uniform elastic repulsive force in the longitudinal direction regardless of the distance from the fastening portion by the screw (85), whereby the bezel (81) and the back cabinet (82) Regardless of the distance from the fastening portion by (85), it will be elastically deformed uniformly.
As a result, the gasket (80) is in close contact with the bezel (81) and the back cabinet (82) with a uniform pressing force, and high sealing performance is exhibited.

According to the above-mentioned image display device, complete waterproofing is achieved by the high sealing performance exhibited by the gasket (80), and therefore there is no risk that rain water will infiltrate into the inside of the housing (8). Therefore, it can withstand long-term use outdoors.

Also, since the space between the image display panel (5) and the protective panel (2) is filled with the bonding layer (3), the heat released from the image display panel (5) passes through the bonding layer (3). Since the heat is efficiently transmitted to the protection panel (2) and dissipated from the surface of the protection panel (2) to the outside, the heat dissipation is good.

Furthermore, according to the image display device, the weight of the protection panel (2) can be reliably supported by the structure in which the protection panel (2) is held between the bezel (81) and the back cabinet (82).
Here, since the protective panel (2) is sandwiched between the bezel (81) and the back cabinet (82) via the gasket (80), the protective panel (2) exerts a buffering action by the gasket (80). 2) There is no unreasonable external force acting on it. This can prevent damage to the protective panel (2).

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, the cavity (80a) of the gasket (80) is not limited to a form dispersed in a plurality of places, but it is also possible to adopt a form forming one cavity extending the entire length of the central part of the gasket (80) It is.

In addition, a drainage path for draining water that has entered the inside of the bezel (81) between the contact surface of the front outer periphery of the protection panel (2) and the opening edge (83) of the bezel (81) It is also possible to prevent water from collecting inside the bezel (81) by forming a groove, for example.

Also, the gasket (80) may be configured to be interposed not only between the protective panel (2) and the back cabinet (82) but also between the protective panel (2) and the bezel (81). .
Furthermore, the gasket (80) is not limited to a loop shape surrounding the entire circumference of the screen, and for example, it is also possible to adopt a loop shape in which at least a part is missing at the lower side of the four sides.

(1) Image display unit
(10) Image display surface
(2) Protective panel
(3) Bonding layer
(8) Case
(80) Gasket
(80a) hollow
(81) bezel
(82) Back cabinet
(83) Opening edge
(84) Outer edge
(85) Service

Claims (7)

A housing formed by joining and fixing a bezel and a back cabinet to each other;
An image display unit housed inside the housing;
A gasket made of an elastic material is interposed between the bezel and the back cabinet and extends around the image display surface of the image display unit, the gasket having one or more hollows therein. An image display apparatus characterized in that A housing formed by joining and fixing a bezel and a back cabinet to each other;
An image display unit housed inside the housing;
A translucent member disposed on the front opening of the housing covering the image display surface of the image display unit and having an outer peripheral portion held between the opening edge of the bezel and the outer peripheral edge of the back cabinet With a protection panel,
The image display unit is interposed between opposing surfaces of the rear outer peripheral portion of the protective panel and the outer peripheral edge of the back cabinet and / or between opposing surfaces of the front outer peripheral portion of the protective panel and the opening edge of the bezel A gasket made of an elastic material and extending around the image display surface of the image display device, the gasket having one or more cavities therein. The gasket is interposed between the facing surfaces of the back outer periphery of the protection panel and the outer peripheral edge of the back cabinet, and the front outer periphery of the protective panel and the opening edge of the bezel abut each other. Image display device as described. The opening edge of the bezel and the outer peripheral edge of the back cabinet are fastened to each other by screws at a plurality of locations along the longitudinal direction of the outer peripheral edge. Image display device. The image display apparatus according to any one of claims 1 to 4, wherein the bezel and the back cabinet are made of synthetic resin. A plurality of hollows are formed in the inside of the gasket by dispersing the gasket into a plurality of locations of an arbitrary cross section orthogonal to the longitudinal direction and dispersing the plurality of cavities in the longitudinal direction. The image display device according to any one of 5. The image display device according to any one of claims 1 to 5, wherein one or more hollows extending over the entire length of the gasket are formed in a central portion of the gasket.

Images