JPH08101458A - Casing of electronic apparatus - Google Patents

Abstract

PURPOSE: To prevent the infiltration of liquid, such as water drops, while well maintaining the flow of air for cooling by joining one side parts of louver members existing right under openings and having recessed parts for reserving liquid in the other side parts to grille members. CONSTITUTION: This casing for electronic apparatus has a vent port opened to face upward. The plural louver members 36 formed at the grille members 34 in correspondence to the respective apertures 35 of the grille members 34 are joined in their one-side parts to the grille members 34. The other-side parts are arranged apart from the grille members 34 so as to exist right under the respective apertures 35. Further, the other-side parts parted from the grille members 34 are provided with the recessed parts 37 for reserving liquid. As a result, the flow of the air through the respective apertures 35 is not blocked and the water drops infiltrating from the upper side to the respective apertures 35 are reserved in the recessed parts 37 for reserving liquid, by which the passage of the water drops through the apertures 35 is prohibited.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for electronic equipment which constitutes an electronic equipment such as a projector device for enlarging and projecting an image displayed by an LCD (liquid crystal display) panel on a screen.

[0002]

2. Description of the Related Art Conventionally, a projector device has been proposed which is configured to use an LCD (liquid crystal display) panel as an image display means and to magnify and project an image displayed by the LCD panel on a screen by a projection lens. ing.

In such a projector device,
The LCD panel is arranged so as to be on the focal plane of the projection lens in an outer housing which is a housing for electronic equipment, and is illuminated by a lamp such as a metal halide lamp.

In such a projector device, since the LCD panel is illuminated by the lamp, the LCD panel and polarizing filters arranged in front of and behind the LCD panel, in particular, polarized light on the illumination light incident side. The filter is heated. That is, the LCD panel and the polarization filter are self-heated due to the radiation heat from the lamp and the self-heating due to the absorption of the polarization component in the anti-transmission axis direction.
Heated.

Therefore, in this projector device, the LCD panel and the polarization filter are cooled by an axial fan (propeller type fan). That is, this axial fan allows air on the outer side of the outer casing to flow into the outer casing, and the air is fed to the LCD.
The LCD panel and the polarization filter are cooled by passing near the panel and the polarization filter.

[0006]

By the way, in the electronic equipment casing constituting the projector apparatus as described above, the air for cooling the LCD panel and the polarization filter is supplied to the electronic equipment casing. It is necessary to have a ventilation port for the air that flows in and is heated by the LCD panel and the polarization filter to be discharged to the outside.

However, when the electronic device casing is provided with a ventilation port, liquid such as water droplets may enter the electronic device casing through the ventilation port.

In particular, the ventilation port for discharging the air heated by the LCD panel and the polarizing filter from the inside of the electronic device casing, in order to efficiently discharge the air by utilizing convection of air, It is often formed on the upper surface of the electronic device casing. When the ventilation port is formed on the upper surface of the electronic device casing, depending on the installation location, there is a high possibility that a water drop that has dripped from the upper side may enter the ventilation port. If water drops or the like enter the outer casing through the ventilation port, the lamp or the optical device arranged in the electronic device casing may be damaged.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and while the flow of the air for cooling the built-in electronic device inside and outside is favorably performed, liquid such as water droplets It is an object of the present invention to provide a housing for electronic equipment in which intrusion is surely prevented.

[0010]

In order to solve the above-mentioned problems and achieve the above-mentioned objects, a housing for electronic equipment according to the present invention comprises:
An outer casing having a ventilation opening that is open toward the upper side, a grill member that has a plurality of openings, is formed in a substantially flat plate shape, and is arranged corresponding to the ventilation opening, and the ventilation opening. A plurality of louver members provided on the grill member so as to face the inner side of the grill member and one side portion of each louver member is joined to the grill member and the other side portion of the louver member is provided. It is disposed apart from the grill member, is located directly below each of the openings, and is located on the other side portion separated from the grill member.
It has a liquid reservoir concave portion.

[0011]

In the electronic equipment casing according to the present invention, a plurality of louver members provided on the grill member corresponding to the respective openings of the grill member have one side portion joined to the grill member and the other side. Since the portion is disposed apart from the grill member and is located immediately below each of the openings, and has the liquid reservoir concave portion on the other side portion separated from the grill member,
Water droplets that enter the openings from above from the upper side are stored in the liquid storage concave portion without obstructing the flow of air through the openings, thereby preventing the water droplets from passing through the openings. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings.

This example is an example in which the electronic apparatus casing according to the present invention is applied to the configuration of a projector device.

As shown in FIGS. 1 to 3, this projector device has a chassis box 4 which is the housing for electronic equipment. The chassis box 4 is formed into a substantially rectangular parallelepiped housing.

On the top plate 2 of the chassis box 4,
The hanger member 1 is attached. The chassis box 4 is suspended and supported by the ceiling 21 via the hanger member 1. In addition, this chassis box 4
Is covered with a cover 23 attached to the ceiling 21, as shown in FIG.

Inside the chassis box 4, a lamp house 3 is housed and disposed on the rear side. As shown in FIG. 5, the lamp house 3 is formed in a housing shape in which the front side is opened, and houses the metal halide lamp 31. The lamp house 3 has a plurality of through holes so that air can flow in and out of the lamp house 3. A concave reflecting mirror 32 is arranged on the rear side of the metal halide lamp 31. The light emitted from the metal halide lamp 31 is reflected by the concave reflecting mirror 32 and emitted to the front side of the lamp house 3.

On the upper side of the lamp house 3,
An exhaust fan 24 is provided. This exhaust fan 24
Is a coaxial fan (propeller type fan), and
As indicated by the middle arrow I, the air in the lamp house 3 is discharged to the upper side of the lamp house 3 through the through hole of the lamp house 3.

The luminous flux emitted from the lamp house 3 passes through a condenser lens (not shown), and as shown in FIG. 2, the first dichroic mirror 5 which is a color separation mirror R (red) in the chassis box 4. ) And G (green) and B (blue). The R (red) and G (green) light beams that have been color-separated by the first dichroic mirror 5 are incident on the second dichroic mirror 8 via the first pre-polarization filter 6. In addition, the B (blue) light beam color-separated by the first dichroic mirror 5 passes through the second pre-polarization filter 7 and enters the optical path of this light beam by 45 degrees.
It is incident on the mirror 9 arranged at an angle of °.

The luminous flux incident on the second dichroic mirror 8 is separated into two luminous fluxes of R (red) and G (green). The light fluxes separated in color by the second dichroic mirror 8 are first and second LCD (liquid crystal display) panels 10 and 11 serving as image display means.
Is incident in response to. The light flux incident on the mirror 9 has its optical path deflected and is incident on the third LCD panel 12 serving as an image display unit.

In this way, the luminous flux incident on the first LCD panel 10 passes through the dichroic mirrors 5 and 8 to obtain R (red), G (green) and B.
It is the light flux of the first color (R (red)) of (blue). In addition, the light flux incident on the second LCD panel 11 passes through the dichroic mirrors 5 and 8 so that the second color of R (red), G (green), and B (blue) ( The luminous flux is G (green). Then, the luminous flux incident on the third LCD panel 12 is
By going through the first dichroic mirror 5,
It is the light flux of the third color (B (blue)) of R (red), G (green), and B (blue).

As shown in FIG. 1, incident side polarization filters 16 are provided on the luminous flux incident sides of the LCD panels 10, 11 and 12, respectively. These incident side polarization filters 16 and LCs corresponding to these incident side polarization filters 16
3 mm to 5 m between D panel 10, 11, 12
A void of about m is formed.

The incident-side polarization filters 16 cooperate with the pre-polarization filters 6 and 7 to make the light beams incident on the LCD panels 10, 11 and 12 into a linearly polarized state. In this projector device,
Since the action of making the light fluxes incident on the panels 10, 11, 12 into the linearly polarized state is dispersed in the pre-polarization filters 6 and 7 and the incident-side polarization filters 16, the pre-polarization filters 6 and 6 are dispersed. 7 and the temperature rises of the respective incident side polarization filters 16 are suppressed.

In addition, each of the LCD panels 10, 11, 1 described above
Emission-side polarization filters (not shown) are respectively arranged on the light-emission side of the two light fluxes. These emission side polarization filters are LCD panels 1 corresponding to the emission side polarization filters.
It is attached to the main surface portions of the luminous flux exit sides of 0, 11, and 12.

The luminous fluxes emitted from the LCD panels 10, 11 and 12 are incident on the combining prism 13. The three light beams incident on the combining prism 13 are combined with each other to form one light beam. The light fluxes synthesized by the synthesis prism 13 enter a projection lens 14 arranged in the front portion of the chassis box 4.

The projection lens 14 comprises a lens barrel and a plurality of lenses 15 arranged in the lens barrel. The lens barrel is made to penetrate the front plate portion of the chassis box 4. Are arranged.

The projection lens 15 projects the incident light beam on a screen (not shown) arranged in front of the projector device. The projection lens 15 has a rear focal plane in the vicinity of the image display surface portion of each of the LCD panels 10, 11 and 12, and the LCD panel 1
The image in which the images displayed by 0, 11, and 12 are combined is enlarged and projected on the screen.

Then, as shown in FIGS. 1 and 4, this projector device includes the LCD panels 10, 11,
12 and an air flow passage tube 28 forming an air flow passage for cooling each of the polarization filters 16 described above. The air passage cylinder 28 is formed in a cylinder shape having a substantially rectangular cross section, and is arranged so as to include the LCD panels 10, 11 and 12 therein. That is, the air flow tube 28 includes the introduction tube portion 18 that extends horizontally above the synthetic prism 13,
Each of the above LCDs is hung downward from the introduction tube portion 18
The duct portion 19 corresponding to each LCD panel 10, 11, 12 facing the upper side of the panel 10, 11, 12 and each L
It has an exhaust port 20 corresponding to each of the LCD panels 10, 11 and 12 which is provided on the lower side of the CD panels 10, 11 and 12.

Each of the LCDs of the air passage cylinder 28 is
As described above, the portion including the panels 10, 11 and 12 is capable of horizontally injecting the light flux into the LCD panels 10, 11 and 12 and horizontally emitting the light flux from the LCD panels 10, 11 and 12. Has become.

At the front end of the introduction tube portion 18,
The air discharge part of the intake fan device 17 is joined. The intake fan device 17 is configured to have a substantially circular can-shaped housing portion and a sirocco fan (centrifugal fan) housed in the housing portion and rotated. The air discharge portion of the intake fan device 17 is an opening formed on the side surface of the casing. And this intake fan device 17 is
An air suction section 30 is provided at the center of the bottom surface of the housing section. The air suction portion 30 is an opening portion formed in the housing portion and corresponds to the central portion of the sirocco fan. To the air intake portion 30 of the intake fan device 17, a base end portion of an intake cylinder portion 25 forming a part of the air flow passage cylinder 28 is joined. This intake cylinder portion 25 is
The front end side is bent toward the front side inside the chassis box 4, and the front end portion serves as an intake port 26. The intake port 26 is exposed to the outside on the front side through a mesh-shaped through hole formed on the front surface of the chassis box 4.

That is, the air passage cylinder 28 has the intake port 26 and the exhaust port 20 which are open to the outside, and the other parts of the intake port 26 and the exhaust port 20 are in a sealed state. .

An intake side air filter 27 is arranged in the intake cylinder portion 25 in the vicinity of the intake port 26. The intake side air filter 27 is for passing the air flowing into the air flow path cylinder 28 through the intake port 26, and removes dust in the air. Further, an exhaust side air filter 29 is arranged in the vicinity of the exhaust port 20 in the air flow pipe 28. The exhaust side air filter 29 is for passing the air flowing out of the air flow channel cylinder 28 through the exhaust port 20, and removes dust in the air.

The intake fan device 17 has an arrow A in FIG.
And as indicated by an arrow B, the air on the outer side is caused to flow into the air passage pipe 28 through the intake port 26, and as shown by an arrow F in FIG. The air inside is discharged to the outside through the exhaust port 20.

In the air passage cylinder 28, the air discharged from the intake fan device 17 passes through the introduction cylinder portion 18 and inside each of the duct portions 19 as shown by arrows C and D in FIG. Flow into. The air that has flowed into the duct portion 19 is, as indicated by an arrow E in FIG.
It reaches the exhaust port 20 through the vicinity of the D panels 10, 11, 12 and the incident side polarization filter 16.

As described above, each of the LCD panels 10 and 1
1, 12 and the air flowing in the vicinity of the incident side polarization filter 16 receives heat from the LCD panels 10, 11, 12 and the incident side polarization filter 16 and is heated, whereby the LCD panel 10, 11 is heated. , 12 and the incident side polarization filter 16 are cooled. The above LCDs
Panels 10, 11, 12 and the incident side polarization filter 16
The air also passes through the space between and, so that the incident side polarization filter 16 that is particularly heated can be cooled well.

Since the intake port 26 and the exhaust port 20 are closed by the intake side air filter 27 and the exhaust side air filter 29, respectively, the inside of the air flow pipe 28 is protected against dust. Is hermetically sealed, regardless of whether the intake fan device 17 is operating or not,
Ingress of dust is prevented.

The rear upper surface of the chassis box 4 is located above the lamp house 3, that is, above the exhaust fan 24, and has an air vent opening upward. 33 is formed.

A through hole 22 is formed in the ceiling 21 corresponding to the ventilation port 33. That is, the ventilation port 33 faces the upper side of the ceiling 21 through the through hole 22.

A grill member 34 is attached to the chassis box 4 so as to correspond to the ventilation port 33, that is, to close the ventilation port 33. As shown in FIGS. 5 and 6, the grill member 34 is formed in a substantially flat plate shape having a plurality of slit-shaped openings 35.

A plurality of louver members 36 are provided on the lower surface of the grill member 34 so as to face the inside of the ventilation port 33 and correspond to the openings 35. Each of the louver members 36 is formed of a material such as a metal plate and has a substantially rectangular shape. One side edge portion is joined to the grill member 34 and the other side edge portion is separated from the grill member 34. , The openings 3 corresponding to the openings 35
5 are arranged in parallel.

The louver members 36 are located directly below the corresponding openings 35. That is, the other side edge portion of each louver member 36 and the edge portion of the opening portion 35 corresponding to the louver member 36 overlap in the vertical direction as indicated by an arrow G in FIG.

Further, each louver member 36 has a liquid reservoir concave portion 37 on the other side edge portion separated from the grill member 34. The liquid reservoir concave portion 37 is formed by bending the other side edge portion of each of the louver members 36 upward at a substantially right angle.

Both ends of these louver members 36 are located on the outer side of the ventilation port 33 than the edge portions on both sides of the ventilation port 33.

In the chassis box 4 having the grill member 34 and the louver member 36 as described above, the air discharged from the air passage cylinder 28 through the exhaust port 20 passes through the ventilation port 33 through the ventilation port 33. While being discharged to the outer side of the chassis box 4, as shown by arrows F, H and I in FIG. 5, it passes through the inside of the lamp house 3 and then through the exhaust fan 24 and the ventilation port 33. It is discharged to the outside of the chassis box 4.

At this time, the louver member 36 does not hinder the flow of air through the openings 35. The louver members 36 collect the water droplets, which enter the openings 35 from the upper side of the ceiling 21 in the liquid reservoir concave portions 37, as shown by arrows J in FIG. 38 above chassis box 4
Prevent invasion.

The water droplets thus accumulated in the liquid reservoir recess 37 are evaporated by the heat of the air discharged through the opening 35, or flow in the liquid reservoir recess 37. It is discharged from the liquid reservoir concave portion 37.

In this way, when the water drops 38 flow in the liquid reservoir concave portion 37 and are discharged from the liquid reservoir concave portion 37, both end portions of each louver member 36 have edges on both sides of the ventilation port 33. Since the water droplet 38 is located on the outer side of the ventilation port 33 than the portion, the water droplet 38 will flow down to the outer side of the ventilation port 33 and will not enter the ventilation port 33.

[0047]

As described above, in the electronic device casing according to the present invention, the grill member is provided in correspondence with each opening of the grill member arranged corresponding to the ventilation port of the outer casing. The plurality of louver members provided are arranged so that one side portion is joined to the grill member and the other side portion is spaced apart from the grill member so as to be located immediately below each opening and spaced from the grill member. The other side portion has a liquid reservoir concave portion.

Therefore, each of the louver members collects water droplets intruding into the respective openings from above from the upper side without disturbing the flow of the air through the respective openings, and thereby the Water droplets can be prevented from passing through the opening.

That is, the present invention provides a housing for an electronic device in which the flow of air for cooling the built-in electronic device is well performed while the liquid such as a water drop is reliably prevented from entering. Is what you can do.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view of a projector device having an electronic device casing according to the present invention.

FIG. 2 is a bottom view showing the structure of the projector device with a part thereof cut away.

FIG. 3 is a front view showing the configuration of the projector device.

FIG. 4 is a side view showing a partially cutaway view of a structure of an air flow path of the projector device.

FIG. 5 is a longitudinal cross-sectional view of a main part showing a configuration in the vicinity of a ventilation port of the projector device.

FIG. 6 is a partially cutaway perspective view showing a configuration of a grill member arranged corresponding to the ventilation port.

[Explanation of symbols]

 4 Chassis Box 33 Ventilation Port 34 Grill Member 35 Slit Opening 36 Louver Member 37 Liquid Reservoir Recess

Claims (1)

[Claims] 1. An outer casing having a ventilation opening opened upward, and a grill formed in a substantially flat plate shape having a plurality of openings and arranged corresponding to the ventilation opening. And a plurality of louver members provided on the grill member so as to face the inner side of the ventilation port and correspond to the openings, and each louver member has one side portion of the grill member. Is connected to the grill member so that the other side portion thereof is spaced apart from the grill member, is positioned immediately below each of the openings, and has a liquid reservoir concave portion at the other side portion separated from the grill member. Electronic device housing.