JP2006243206A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a fan used for a lamp box from being adversely influenced due to high temperature heat. <P>SOLUTION: This projector is designed as described below. A light ray is projected to an optical engine from the lamp box. An image is projected by the projection lens of the optical engine. Power is supplied to a drive section 11 via the cord 11a of a fan 6A. A current of cooling air, generated by rotating each vane 13 via a rotation body 12, is blown onto the lamp box through the vent holes 4 of a grid frame 5. The grid frame 5 includes a heat insulation plate 5a integrally formed opposite the central part 10 of the fan 6A, the heat insulation plate 5a having a diameter almost equal to that of the central part 10. Heat rays from the lamp box 3 are intercepted by the heat insulation plate 5a. In the projector, a recessed part 25 slightly smaller in diameter than the heat insulation plate 5a is formed in the face of the heat insulation plate 5a, which faces the lamp box. A mirror plate 26 having a shape identical as that of the recess 25 and having a mirror finished surface is fitted in the recessed part 25 and joined to it with an adhesive. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector for projecting, for example, a television image on a screen.

2. Description of the Related Art Conventionally, there is a projector described in Patent Document 1 or the like, and an example thereof will be described with reference to FIGS. 9 to 14. An optical engine 2, a lamp box 3, a lamp Fans 6 </ b> A and 6 </ b> B fixed to a synthetic resin lattice frame 5 with vent holes 4 that support the box 3 are arranged.

The fan 6A for the lamp box 3 includes a square outer frame 8 fixed to the lattice frame 5 with screws 7, and a plurality of connecting rods 9A to 9C arranged in the center of the outer frame 8 through the connecting frame 9A to 9C. A circular central portion 10 integrally connected to the outer frame 8, and a plurality of wing bodies 13 projecting radially on the outer peripheral surface of a rotating body 12 rotated by a drive portion 11 attached to the central portion 10, A cord 11a connected to the drive unit 11 extends to the outside of the outer frame 8 through a concave groove 14 formed in a suitable connecting rod 9A. Since the structure of the fan 6B for the optical engine 2 is the same, the description thereof is omitted. In addition,
In FIG. 10, 15 is a lamp of the lamp box 3, 16 is a reflector, 17 is an exhaust port formed on the front surface of the casing 1, 18 is an air intake port formed from the side surface to the rear surface of the casing 1, 19 is a controller board, and 20 is a power source. It is a board.

In the above configuration, light rays are projected from the lamp box 3 onto the optical engine 2 via a color wheel (not shown), and an image is displayed on the screen 2 by the projection lens 2 a of the optical engine 2.
2, the drive unit 11 is energized through the cords 11a of the fans 6A and 6B, and the rotating body 1
By rotating each wing body 13 through 2, air is sucked into the casing 1 from the air inlet 18, and cooling air is blown through the vent holes 4 of the lattice frame 5 to the lamp box 3 and the optical engine 2. The cooled air is exhausted from the exhaust port 17.

As shown in FIG. 14, a circular heat insulating plate 5a having the same diameter as the central portion 10 is formed integrally with the lattice frame 5 so as to face the central portion 10 of the fan 6A, and the lamp box 3 is formed by the heat insulating plate 5a.
The heat ray from is interrupted. The lamp box 3 is fixed to the L-shaped frame 5b integrally formed with the lattice frame 5 with screws 23 (see FIG. 11).
JP 2002-25305 A

In the conventional configuration, the central portion 10 of the fan 6A is close to the lamp box 3,
Bearings of the drive unit 11 in the center 10 and I
C substrate etc. are exposed. Therefore, the heat insulating plate 5 is interposed between the central portion 10 and the lamp box 3.
The heat ray from the lamp box 3 is interrupted by interposing a. However, with this alone, high heat is generated in the heat insulating plate 5a due to an environmental condition such as an outside air temperature or a temperature rise due to an RGB segment of a color wheel (not shown). Is accumulated and the high heat causes the bearings and I
The life of the C substrate is shortened due to adverse effects.

Further, since the cord 11a passed through the concave groove 14 of the connecting rod 9A is exposed, the cord 1
The film 1a may be deteriorated by the heat rays emitted from the lamp box 3 to cause a short-circuit accident, and high heat may be transmitted from the cord 11a to the drive unit 11 of the fan 6A to cause thermal damage to the drive unit 11. is there.

The present invention has been made in view of the above-described conventional drawbacks, and an object of the present invention is to provide a projector in which a lamp box fan is not adversely affected by high heat.

In order to achieve the above object, an invention according to claim 1 is directed to an optical engine and a lamp box at a front portion in a casing, and a fan fixed to a lattice frame made of a synthetic resin with vent holes for supporting the lamp box. A fan-shaped outer frame fixed to a lattice frame, and a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, A plurality of wings projecting radially on the outer peripheral surface of a rotating body rotated by a driving unit attached to the center, and a cord connected to the driving unit is formed in an appropriate connecting rod The light beam is projected from the lamp box to the optical engine, the image is projected by the projection lens of the optical engine, and the drive unit is energized through the fan cord. Rotate each wing through the rotor. The cooling air generated is blown through the ventilation holes of the lattice frame to the lamp box, and the lattice frame is integrally formed with a heat insulating plate having the same diameter as the central portion facing the central portion of the fan. In the projector in which the heat rays from the lamp box are blocked by the heat insulating plate, a concave portion having a slightly smaller diameter than the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and the mirror surface is substantially the same shape as the concave portion. It is characterized in that the processed mirror plate is fitted into the recess and bonded with an adhesive.

According to the second aspect of the present invention, an optical engine and a lamp box, and a fan fixed to a lattice frame made of a synthetic resin with a vent hole for supporting the lamp box are disposed at a front portion in the casing, A square-shaped outer frame fixed to the lattice frame, a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, and a drive attached to the central portion A plurality of wings projecting radially on the outer peripheral surface of the rotating body rotated by the section, and the cord connected to the driving section passes through a concave groove formed in an appropriate connecting rod and is outside the outer frame. Is projected to the optical engine from the lamp box, the image is projected by the projection lens of the optical engine, the drive unit is energized through the cord of the fan, and Cooling air generated by rotating the wing body The lattice frame is formed so as to be blown through the ventilation holes of the lattice frame, and a heat insulating plate having the same diameter as the central portion is formed integrally with the lattice frame so as to face the central portion of the fan. In the projector configured to block heat rays from the box, a branch rod having substantially the same shape as the connection rod is integrally formed on the lattice frame so as to face the connection rod through which the cord is passed. A recess having a slightly smaller diameter than that of the heat insulating plate is formed, and a recess having a width slightly smaller than that of the branch ridge is formed on the surface of the branch ridge facing the lamp box so as to be substantially the same shape as the recess. An extension plate having substantially the same shape as the concave path is integrally provided on the mirror-finished mirror plate, and the mirror plate is fitted into the recess and the extension plate is fitted into the concave path, respectively, and is adhered by an adhesive. .

According to a third aspect of the present invention, an optical engine, a lamp box, and a fan fixed to a synthetic resin lattice frame with vent holes for supporting the lamp box are disposed in a front portion of the casing, A square-shaped outer frame fixed to the lattice frame, a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, and a drive attached to the central portion A plurality of wings projecting radially on the outer peripheral surface of the rotating body rotated by the section, and the cord connected to the driving section passes through a concave groove formed in an appropriate connecting rod and is outside the outer frame. Is projected to the optical engine from the lamp box, the image is projected by the projection lens of the optical engine, the drive unit is energized through the cord of the fan, and Cooling air generated by rotating the wing body The lattice frame is formed so as to be blown through the ventilation holes of the lattice frame, and a heat insulating plate having the same diameter as the central portion is formed integrally with the lattice frame so as to face the central portion of the fan. In the projector configured to block heat rays from the box, a heat ray reflecting means is provided on the surface of the heat insulating plate facing the lamp box.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a recessed portion having a slightly smaller diameter than the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and the heat ray reflecting means is substantially the same shape as the recessed portion. The mirror plate is mirror-finished, and is characterized in that the mirror plate is fitted into the recess and bonded with an adhesive.

According to a fifth aspect of the present invention, in the third aspect of the present invention, a hollow portion having a slightly smaller diameter than the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and a tip is provided at the periphery of the hollow portion. A plurality of locking claws projecting into the hollow portion are integrally projected at a predetermined interval in the circumferential direction, and the heat ray reflecting means is a mirror plate having a mirror finish that is substantially the same shape as the hollow portion. It is characterized in that the front ends of the respective locking claws are pushed and fitted into the recesses.

A sixth aspect of the invention is characterized in that, in the third aspect of the invention, the heat ray reflecting means comprises an infrared / ultraviolet reflective coating applied to a lamp box facing surface of the heat insulating plate.

According to a seventh aspect of the present invention, in the third aspect of the invention, a branch rod having substantially the same shape as the connection rod is integrally formed on the lattice frame so as to face the connection rod through which the cord is passed. A recess having a slightly smaller diameter than the heat insulating plate is formed on the surface facing the lamp box, and a recess having a width slightly smaller than the branch is communicated with the recess on the surface facing the lamp box of the branch. The reflecting means comprises a mirror plate having a mirror finish that is substantially the same shape as the recess, and an extension plate that is substantially the same shape as the recess is integrally projected on the mirror plate, and the extension plate is recessed in the recess. It is characterized in that it is fitted into each and adhered by an adhesive.

The invention according to claim 1 corresponds to the first embodiment (see FIGS. 1 and 2), and according to this, the heat rays emitted from the lamp box toward the heat insulating plate are mirror-finished. Since it is efficiently reflected by the mirror plate, the high heat accumulated in the heat insulating plate is reduced and the temperature rise is reliably suppressed. Therefore, even if the temperature rises due to environmental conditions such as the outside air temperature or the RGB segment of the color wheel, the fan drive bearings and IC boards are less likely to be adversely affected by high heat, and the life of the fan is reduced. It can be greatly extended compared to the conventional case.

Moreover, the mirror plate can be reliably locked to the heat insulating plate by fitting the mirror plate into the recessed portion of the heat insulating plate and bonding the mirror plate with an adhesive.

The invention according to claim 2 corresponds to the fourth embodiment (see FIGS. 6 to 8), and according to this, the same effect as the invention according to claim 1 can be obtained. In particular, since the fan cord is covered with the branch plate integrally formed on the lattice frame and the extension plate integrally projecting on the mirror plate, the cord film is deteriorated by the heat rays emitted from the lamp box, resulting in a short-circuit accident. Can be prevented, and high temperature can be prevented from being transmitted from the cord to the drive unit of the fan to cause thermal damage to the drive unit.

The invention according to claim 3 corresponds to the basic form, and according to this, the heat rays emitted from the lamp box toward the heat insulating plate are caused by the heat ray reflecting means provided on the lamp box facing surface of the heat insulating plate. Since it is reflected, the high heat accumulated in the heat insulating plate is reduced to suppress the temperature rise. Therefore, even if the temperature rises due to environmental conditions such as the outside air temperature or the RGB segment of the color wheel, the fan drive bearings and IC boards are less likely to be adversely affected by high heat, and the life of the fan is reduced. It can be greatly extended compared to the conventional case.

According to the invention described in claim 4, since the heat rays emitted from the lamp box toward the heat insulating plate are efficiently reflected by the mirror-finished mirror plate, the high heat accumulated in the heat insulating plate is reduced and the temperature rises. Can be reliably suppressed.

Moreover, the mirror plate can be reliably locked to the heat insulating plate by fitting the mirror plate into the recessed portion of the heat insulating plate and bonding the mirror plate with an adhesive.

According to the invention described in claim 5, the same effect as that of the invention described in claim 3 can be obtained. In particular, the tip of each locking claw in which the mirror plate is integrally projected on the peripheral edge of the recess is separated. Therefore, the mirror plate can be securely locked to the heat insulating plate simply by being fitted into the recess, and an adhesive is not required for the locking, which is economical.

According to the invention described in claim 6, since infrared rays and ultraviolet rays, which are heating sources of heat rays emitted from the lamp box toward the heat insulating plate, are efficiently reflected by the infrared ray / ultraviolet reflective coating, they accumulate in the heat insulating plate. The high heat that is generated can be reduced and the temperature rise can be reliably suppressed. Especially, the application work of the infrared / ultraviolet reflective coating can be performed continuously in a short time, so it is excellent in mass productivity and cost reduction. be able to.

According to the invention described in claim 7, the same effect as that of the invention described in claim 3 can be obtained, and in particular, by the branch plate integrally formed on the lattice frame and the extension plate integrally protruding on the mirror plate. Since the fan cord is covered, it is possible to prevent the cord film from being deteriorated by the heat rays emitted from the lamp box and causing a short circuit accident, and high heat is transmitted from the cord to the fan drive unit. Can be prevented from being thermally damaged.

FIG. 1 and FIG. 2 show the main part of the projector according to the first embodiment of the present invention. The circular recess 25 having a slightly smaller diameter than the heat insulating plate 5a is provided on the surface of the heat insulating plate 5a facing the lamp box.
A circular metal mirror plate (heat ray reflecting means) 26 having a mirror finish substantially the same shape as the hollow portion 25 is fitted into the hollow portion 25 and bonded with a thermosetting adhesive 27. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 9 to 14, the same parts are denoted by the same reference numerals and the description thereof is omitted.

According to the above configuration, the heat rays emitted from the lamp box 3 toward the heat insulating plate 5a are efficiently reflected by the mirror-finished mirror plate 26. Therefore, the high heat accumulated in the heat insulating plate 5a is reduced and the temperature rises. Surely suppress. Therefore, even if the temperature rises due to environmental conditions such as the outside air temperature or the RGB segment of the color wheel, the fan 6 for the lamp box 3 is used.
The bearing of the A drive unit 11 and the IC substrate are less likely to be adversely affected by high heat, and the life of the fan 6A can be greatly extended compared to the conventional case.

Moreover, the mirror plate 26 can be reliably locked to the heat insulating plate 5a by fitting the mirror plate 26 into the recess 25 of the heat insulating plate 5a and bonding the mirror plate 26 with the adhesive 27.

In the first embodiment, the mirror plate 26 is locked to the heat insulating plate 5a with the adhesive 27. However, the present invention is not limited to this, and as shown in FIG. 3 and FIG. On the periphery of
Plural (three in this embodiment) locking claws 2 having the tip 29a protruding into the recess 25
9 may be integrally protruded at a predetermined interval in the circumferential direction, and the tip 29a of each locking claw 29 may be pushed apart to fit the mirror plate 26 into the recess 25 (second embodiment).

According to the above-described configuration, the mirror plate 26 is pressed against the tips 29a of the respective locking claws 29 so as to be recessed 25.
The mirror plate 26 can be securely locked to the heat insulating plate 5a only by being fitted inside, and the adhesive 27 (see FIG. 2) is not required for the locking, which is economical.

FIG. 5 shows an essential part of a projector according to a third embodiment of the present invention. An infrared / ultraviolet reflective coating (heat ray reflecting means) 31 is applied to the surface of the heat insulating plate 5a facing the lamp box. Yes. Since the configuration other than the above is substantially the same as that of the first embodiment shown in FIGS. 1 and 2, the same portions are denoted by the same reference numerals and the description thereof is omitted.

According to the above configuration, since infrared rays and ultraviolet rays, which are heating sources of heat rays emitted from the lamp box 3 toward the heat insulating plate 5a, are efficiently reflected by the infrared ray / ultraviolet reflective film 31, they are accumulated in the heat insulating plate 5a. The high heat is reduced and the temperature rise can be surely suppressed. In particular, since the application work of the infrared / ultraviolet reflective coating 31 can be performed continuously in a short time, the mass production is excellent and the cost is reduced. be able to.

6 to 8 show the main part of the projector according to the fourth embodiment of the present invention. The projector is opposed to the connecting rod 9A through which the cord 11a of the fan 6A passes through the lattice frame 5. A branch rod 5c having substantially the same shape as that of 9A is integrally formed, and a concave path 33 slightly narrower than the branch rod 5c is formed on the surface of the branch rod 5c opposite to the lamp box so as to communicate with the recess portion 25. An extension plate 26a having substantially the same shape as that of the concave path 33 is integrally projected on the mirror plate 26, and the extension plate 26a is inserted into the recess portion 25.
Are respectively fitted in the recesses 33 and adhered by an adhesive 27. Since the configuration other than the above is substantially the same as that of the first embodiment shown in FIGS. 1 and 2, the same portions are denoted by the same reference numerals and the description thereof is omitted.

According to the above configuration, the same effect as that of the first embodiment can be obtained.
The fan 6A is composed of a branch 5c formed integrally with the mirror plate 26 and an extension plate 26a provided integrally with the mirror plate 26.
Since the cord 11a is covered, the film of the cord 11a is prevented from being deteriorated by the heat rays emitted from the lamp box 3, and a short accident is prevented.
It can be prevented that high heat is transmitted from a to the drive unit 11 of the fan 6A and the drive unit 11 is thermally damaged.

In the fourth embodiment, the mirror plate 26 and the extension plate 26a are bonded by the adhesive 27 to the heat insulating plate 5a.
However, the present invention is not limited to this, and based on the technique shown in the second embodiment (see FIGS. 3 and 4), the mirror plate 26 is secured by the locking claw 29. The extension plate 26a may be locked to the heat insulating plate 5a and the branch rod 5c.

1 is an exploded perspective view of a main part of a projector according to a first embodiment of the invention. It is a longitudinal cross-sectional view of the principal part. (A) is a principal part longitudinal cross-sectional view of the projector which is the 2nd Embodiment of this invention, (b) is a front view of the principal part. It is an enlarged partial view of the main part. It is a principal part longitudinal cross-sectional view of the projector which is the 3rd Embodiment of this invention. It is a principal part disassembled perspective view of the projector which is the 4th Embodiment of this invention. It is a front view of the principal part. It is a longitudinal cross-sectional view of the principal part. It is a perspective view of a projector. It is the horizontal sectional view. It is a longitudinal cross-sectional view which shows a prior art example. It is an AA arrow line view of FIG. It is a front view of the fan for the lamp box. It is the principal part disassembled perspective view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Optical engine 3 Lamp box 4 Vent hole 5 Lattice frame 5a Heat insulation board 5c Branch rod 8 Outer frame 9A-9C Connection rod 10 Center part 11 Drive part 11a Code 12 Rotating body 13 Wing body 14 Concave groove 25 Depression part 26 Mirror Plate (heat ray reflecting means)
26a Extension plate 27 Adhesive 29 Locking claw 31 Infrared / ultraviolet reflective film (heat ray reflecting means)
33 concave road

Claims (7)

An optical engine and a lamp box, and a fan fastened to a synthetic resin lattice frame with vent holes for supporting the lamp box are arranged at a front portion in the casing, and the fan is fastened to the lattice frame. A character-shaped outer frame, a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, and an outer periphery of a rotating body rotated by a driving unit attached to the central portion A plurality of wings projecting radially on the surface, and a cord connected to the drive unit extends through a concave groove formed in a suitable coupling rod to the outside of the outer frame, It is generated by projecting light rays from a box onto an optical engine, projecting an image with a projection lens of the optical engine, energizing a drive unit through the fan cord, and rotating each wing body through a rotating body. Cooling air through the ventilation holes of the lattice frame A heat insulating plate having the same diameter as that of the central portion is integrally formed on the lattice frame so as to face the central portion of the fan, and the heat rays from the lamp box are blocked by the heat insulating plate. In the projector, a recess having a slightly smaller diameter than that of the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and a mirror plate having a mirror finish substantially the same shape as the recess is fitted into the recess and adhered with an adhesive. A projector characterized by that. An optical engine and a lamp box, and a fan fastened to a synthetic resin lattice frame with vent holes for supporting the lamp box are arranged at a front portion in the casing, and the fan is fastened to the lattice frame. A character-shaped outer frame, a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, and an outer periphery of a rotating body rotated by a driving unit attached to the central portion A plurality of wings projecting radially on the surface, and a cord connected to the drive unit extends through a concave groove formed in a suitable coupling rod to the outside of the outer frame, It is generated by projecting light rays from a box onto an optical engine, projecting an image with a projection lens of the optical engine, energizing a drive unit through the fan cord, and rotating each wing body through a rotating body. Cooling air through the ventilation holes of the lattice frame A heat insulating plate having the same diameter as that of the central portion is integrally formed on the lattice frame so as to face the central portion of the fan, and the heat rays from the lamp box are blocked by the heat insulating plate. In the projector, the lattice frame is integrally formed with branch rods having substantially the same shape as the connection rods so as to face the connection rods through which the cords pass, and the heat insulating plate has a slightly smaller diameter than the heat insulation plate on the surface facing the lamp box. A recess is formed, and a concave path having a slightly smaller width than the branch is formed on the surface facing the lamp box of the branch. The recess is formed in a mirror-finished mirror plate having substantially the same shape as the recess. An extension plate having substantially the same shape as the road is integrally projected, and the mirror plate is fitted into the recess and the extension plate is fitted into the recess, respectively, and adhered by an adhesive. An optical engine and a lamp box, and a fan fastened to a synthetic resin lattice frame with vent holes for supporting the lamp box are arranged at a front portion in the casing, and the fan is fastened to the lattice frame. A character-shaped outer frame, a central portion disposed in the center of the outer frame and integrally connected to the outer frame via a plurality of connecting rods, and an outer periphery of a rotating body rotated by a driving unit attached to the central portion A plurality of wings projecting radially on the surface, and a cord connected to the drive unit extends through a concave groove formed in a suitable coupling rod to the outside of the outer frame, It is generated by projecting light rays from a box onto an optical engine, projecting an image with a projection lens of the optical engine, energizing a drive unit through the fan cord, and rotating each wing body through a rotating body. Cooling air through the ventilation holes of the lattice frame A heat insulating plate having the same diameter as that of the central portion is integrally formed on the lattice frame so as to face the central portion of the fan, and the heat rays from the lamp box are blocked by the heat insulating plate. In the projector, a heat ray reflecting means is provided on the surface of the heat insulating plate facing the lamp box. A recess having a slightly smaller diameter than the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and the heat ray reflecting means is a mirror plate having a mirror finish that is substantially the same shape as the recess. The projector according to claim 3, wherein the projector is adhered with a fitting adhesive. A recessed portion having a slightly smaller diameter than the heat insulating plate is formed on the surface of the heat insulating plate facing the lamp box, and a plurality of locking claws having tips protruded into the recessed portion on the periphery of the recessed portion have a predetermined interval in the circumferential direction. The heat ray reflecting means is made of a mirror plate having a mirror finish that is substantially the same shape as the recess, and the mirror plate is fitted into the recess by pushing the tip of each locking claw separately. The projector according to claim 3. 4. The projector according to claim 3, wherein the heat ray reflecting means is made of an infrared / ultraviolet reflective coating applied to a surface of the heat insulating plate facing the lamp box. The lattice frame is integrally formed with branch rods having substantially the same shape as the connection rods so as to be opposed to the connection rods through which the cords are passed, and a recess having a slightly smaller diameter than the heat insulation plate is formed on the surface of the heat insulation plate facing the lamp box. In addition, a concave path having a slightly smaller width than that of the branch ridge is provided on the surface facing the lamp box of the branch ridge so as to communicate with the dent, and the reflecting means is a mirror plate having a mirror finish that is substantially the same shape as the dent. ,
4. An extension plate having substantially the same shape as the recess is integrally formed on the mirror plate, and the extension plate is fitted into the recess in the recess and bonded with an adhesive. Projector.

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