JP2002333670A - Floodlight device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the cooling efficiency and to store and dispose harmful sealed gas and mercury in a recovery part without discharging them out of a floodlight device even in the case of breakdown of an ultra-high pressure mercury lamp 2 in the floodlight device using the ultra-high pressure mercury lamp 2. SOLUTION: This device is provided with an exhaust duct 20 through which broken pieces and harmful mercury occurring at the time of breakdown of the ultra-high pressure mercury lamp 2 are recovered without arranging parts increasing the evacuation resistance, and a shutter 22 which closes an exhaust port 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light projecting device for projecting light, such as a projector, a rear projector, and a microscope, and more particularly, to scatter debris and harmful gas generated when a light source lamp is damaged. The present invention relates to a light projecting device having a means for preventing it from being caused.

[0002]

2. Description of the Related Art FIGS. 10A and 10B are a plan view and a cross-sectional view taken along line CC, respectively, showing an example of a conventional light projecting device. 2. Description of the Related Art Conventionally, as shown in FIG. 5, a light source projecting optical mechanism 6 composed of a light source 5 and the like, an intake fan 1 for sucking air from outside the device and sending the air to the ultra high pressure mercury lamp 2, and an exhaust fan for exhausting air cooled from the ultra high pressure mercury lamp to the outside of the device. 3 is provided.

[0003] As indicated by the arrow, the ultra-high pressure mercury lamp 2 is cooled by the flow of air. In order to prevent the light from the ultra-high pressure mercury lamp 2 from leaking, the light emitting portion of the ultra-high pressure mercury lamp 2 and the light source light emitting optical mechanism 6 are surrounded by a light-shielding barrier.

[0004]

However, an ultra-high pressure mercury lamp pursuing the brightness of a projected image cannot have an explosion-proof structure. Also, even if the structure is improved so as not to break, the lamp rupture cannot be eliminated. In the event of a crack, the enclosed gas and mercury were released into the air.

[0005] As described above, there is no means for protecting the human body from the sealed gas or mercury released into the room, and only measures have been taken with cautionary advice so that the room can be quickly ventilated, exited from the room, and inhaled exhaust gas.

An exposure apparatus that solves this problem is disclosed in Japanese Unexamined Patent Application Publication No.
-69095. In this exposure apparatus, an independent exhaust system is provided in an illumination optical system using a mercury lamp as a light source, and a recovery unit that recovers mercury and mercury vapor is provided in the middle of the exhaust system. Then, when the lamp is broken, harmful mercury and mercury vapor are stored in the recovery unit and treated.

However, since the air is exhausted through the recovery section which is a mercury filter, the exhaust resistance is high and the cooling efficiency is deteriorated. For this reason, a large-capacity exhaust pump is required for cooling. Although there is no problem with an exposure apparatus that is a large facility, it cannot be applied to a light projection apparatus such as a small and handy projector.

Accordingly, an object of the present invention is to provide a floodlight device which can maintain a cooling efficiency and store and treat a harmful sealed gas or mercury in a recovery unit without emitting harmful gas or mercury to the outside even if the lamp is broken. It is in.

[0009]

A feature of the present invention is that a light source lamp, a light source projecting optical mechanism for projecting light from the light source lamp to the outside of the apparatus, and exhaust air sucked from outside the apparatus and cooling the light source lamp. An exhaust duct that guides the air exhausted by the exhaust fan to an exhaust port, and supplies a gas containing debris and harmful mercury generated when the light source lamp is damaged to the exhaust duct. The light emitting device includes a shutter mechanism that closes the exhaust port for closing.

It is preferable that the exhaust duct extends forward from an opening of the exhaust fan located rearward and has the exhaust port disposed forward. Further, the shutter mechanism has a rotating shaft at one end and opens and closes the exhaust port of the exhaust duct, a spring member that closes the exhaust port by rotating the plate member by a repulsive force, and a spring member. A locking mechanism for rotating the plate member against the repulsive force to forcibly open the exhaust port and lock the spring member, wherein the locking mechanism is released by a signal generated when the light source lamp is damaged. Preferably, the plate member is rotated to close the exhaust port.

Another feature of the present invention is that a light source lamp, a light source projecting optical mechanism for projecting light from the light source lamp outside the apparatus,
An exhaust fan that exhausts air that cools the light source lamp from outside of the device and exhausts the air to an exhaust port, wherein the filter member that blocks debris and harmful mercury-containing gas generated when the light source lamp is damaged is provided. A light projecting device including a filter insertion unit inserted between an exhaust fan and the light source lamp.

Preferably, the filter member is a band-shaped member having one opening and a portion having no opening. Further, the filter insertion means includes a reel for winding the band-shaped member, and a locking member for preventing a force for pulling the band-shaped member by a repulsive force of a spring member, and a signal generated when the light source lamp is broken. It is preferable that the locking member is released from the opening to move the band-shaped member from the opening to a portion having no opening by the repulsive force of the spring member.

[0013]

Next, the present invention will be described with reference to the drawings.

FIGS. 1A and 1B are a plan view and a sectional view taken along the line AA, respectively, showing a light projecting device according to an embodiment of the present invention. As shown in FIG. 1, the light projecting device is connected to an opening 7 of an exhaust fan 3 of a box 4 containing a light source projecting optical mechanism 6, an intake fan 1, an ultra-high pressure mercury lamp 2, and an exhaust fan 3, and a lens. An exhaust duct 20 extending to the fifth side,
A plate-like shutter 2 for opening and closing the exhaust port 8 of the exhaust duct 20
2 and a shutter opening and closing mechanism 21 for opening and closing the shutter 22
Is provided. Otherwise, it is the same as the conventional example.

FIG. 2 is a sectional view showing the shutter and the shutter opening / closing mechanism of FIG. The direction of the shutter opening / closing mechanism shown in FIG. 2 is opposite to that of the shutter opening / closing mechanism shown in FIG. As shown in FIG. 2, the shutter opening and closing mechanism described above includes a rotating shaft 9 rotatably attached to one end of a shutter 22 and a shutter 2 on one end side.
2, a leaf spring 10 whose other end is attached to the inner wall of the exhaust duct 20, and a latch 22 which pushes up the shutter 22 against the repulsive force of the leaf spring 10 and is attached to the tip of the shutter 22. And a solenoid 11 for inserting a spindle 13 into a hole of the plate 12.

FIG. 3 is a block diagram showing a power supply system and a cooling control system for the lamp of the floodlight of FIG. As shown in FIG. 3, a power supply system for supplying power to the lamp of the light-emitting device is an AC-DC converter for inputting commercial power and converting AC to DC.
It includes a DC power supply 50 and a lamp stabilizer 51 for stabilizing a DC voltage and supplying a current to a lamp 52.

On the other hand, the cooling control system is controlled by a microcomputer 54 mounted on a substrate 53, which is a microcomputer. First, the power supply to the lamp stabilizer 51 is performed and stopped. The cooling fan 58 issues a command to the cooling fan control 55 so that the lamp has an appropriate temperature.

When an abnormal state occurs due to lamp damage or the like, an abnormal state (abnormal discharge voltage or the like) is detected by the lamp ballast 51, and the signal is transmitted to the microcomputer 54 of the substrate 53. In response to the signal, the microcomputer 54 issues a stop command to the cooling fan control 55 to immediately stop the cooling fan 58 and, at the same time, to operate the exhaust duct shutter control circuit 56.
Is issued to operate the exhaust shutter 59.

FIG. 4 is a flowchart for explaining the operation when the lamp is abnormal, and FIG. 5 is a time chart for explaining the operation when the lamp is abnormal. Next, the operation of the light emitting device of FIG. 1 when the lamp of the light emitting device is damaged will be described with reference to FIGS.

First, the operation of the microcomputer 54 shown in FIG. 3 will be described. Next, in step A of FIG. 4, the process waits for the input of a lamp abnormality signal. Then, step B in FIG.
Thus, the lamp damage signal from the lamp ballast 51 in FIG.
The level is switched from the level to the L level, and the microcomputer 54 shown in FIG.
Command the cooling fan control 55 to stop the cooling fan 58 (the intake fan 1 and the exhaust fan 3 in FIG. 1) and at the same time instruct the exhaust duct shutter control 56 in FIG. 3 to close the exhaust shutter (the shutter 22 in FIG. 2). I do.

As a result, the intake fan 1 and the exhaust fan 3 of FIG. 1 are stopped, the spindle 13 of the solenoid 11 of FIG. 2 is retracted, and the shutter 22 released from the locking plate 12 is connected to the exhaust port of the exhaust duct 20. Close 8. Although the power of the cooling fan is completely turned off in FIG. 5, broken debris and mercury or mercury vapor are pushed out by the cooling air of the intake fan 1 rotating by inertia and passed through the opening 7 in FIG. It is discharged to 20.

Here, referring to FIG.
Although the mechanical operation is delayed from the stop operation of the cooling fan due to the signal transmission from the microcomputer, when the broken debris or mercury or mercury vapor is pushed into the exhaust duct 20, the shutter 22 is already in the exhaust port 8 , The debris and mercury are trapped in the exhaust duct 20. The vaporous mercury gas is also cooled over time, and the exhaust duct 2
It solidifies in 0 and becomes a granular fluid.

The processing of the harmful substances contained in the exhaust duct 20 is performed by removing the exhaust duct 20 from the light emitting device,
The disposal of the exhaust duct 20 or the cleaning of the exhaust duct 20 is entrusted to a disposal specialist.

FIGS. 6A and 6B are a plan view and a sectional view taken along the line BB, respectively, showing a light projecting device according to another embodiment of the present invention. As shown in FIG. 6, the light projecting device includes a filter 30 that blocks debris and harmful mercury-containing gas generated when the ultrahigh-pressure mercury lamp 2 is damaged, and the filter 30 includes the exhaust fan 3 and the ultrahigh-pressure mercury lamp 2. And a filter insertion mechanism 31 inserted between them. Other lenses 5
The light source light emitting optical mechanism 6, the suction fan 1, the exhaust fan 3, and the box 4 including the same are the same as those in the light emitting device of FIG.

FIG. 7 is a perspective view showing the filter insertion mechanism of FIG. As shown in FIG. 7, the filter insertion mechanism shown in FIG. 6 has a band-shaped filter 30 which is held at both ends by support rods 39 and partially has an opening 34, and this filter 30 is superposed via a roll 32. A spring 36 inserted between the high-pressure mercury lamp and the exhaust fan and pulls a support bar at one end of the bridge, and a solenoid 37 for inserting a hook 38 into a hole of the filter 30 to prevent the support bar 39 from moving due to the repulsive force of the spring 36. And a guide rail 35 for guiding the travel of the filter 30.

If the light emitting device is operating normally,
As shown in FIG. 7, a filter 3 is provided before the exhaust fan so that the cooling air of the ultra-high pressure mercury lamp does not become a flow resistance.
0 opening 34 is located.

FIG. 8 is a block diagram showing a power supply system and a cooling control system for the lamp of the floodlight of FIG. The power supply system for the lamp of the light emitting device is the same as that described in FIG. On the other hand, the cooling control system issues a command to the cooling fan control 55 so that the lamp is set to an appropriate temperature by the cooling fan 58.

When an abnormal state occurs due to lamp damage or the like, an abnormal state (abnormal discharge voltage or the like) is detected by the lamp ballast 51, and the signal is transmitted to the microcomputer 54 of the substrate 53. In response to the signal, the microcomputer 54 issues a stop command to the cooling fan control 55 to immediately stop the cooling fan 58, and at the same time, issues a command to insert the filter 59a to the filter insertion control 56a. Further, in this light projecting device, after the cooling fan 58 is stopped, the cooling fan 58 which is temporarily stopped with a time difference is provided in order to improve the adsorption of mercury and mercury vapor to the filter 59b.
Work again.

FIG. 9 is a time chart for explaining the operation when the lamp is abnormal. Next, FIG. 7, FIG. 8 and FIG.
The operation when the lamp breaks will be described with reference to FIG. The lamp damage signal from the lamp ballast 51 shown in FIG.
The microcomputer 54 in FIG. 8 instructs the cooling fan control 55 to stop the cooling fan 58 (the intake fan 1 and the exhaust fan 3 in FIG. 6), and at the same time, the filter insertion control 56a in FIG. Of the filter 30) is inserted.

As a result, the intake fan 1 and the exhaust fan 3 shown in FIG. 6 are stopped, the hook 38 of the solenoid 37 shown in FIG. Moving, the blind portion 33 of the filter 30 between the exhaust fan and the ultra-high pressure mercury lamp.
Position. Although the power of the cooling fan is turned off, the broken debris and mercury or mercury vapor are pushed out by the cooling air that rotates by inertia and adhere to the blind portion 33 of the filter 30.

As shown in FIG. 9, the cooling fan once stopped is operated again, so that the attached debris, mercury or mercury vapor enters the inside of the filter 30. This band-shaped filter 30 is desirably made by knitting glass fibers having a porous surface. Mercury is retained in the filter 30, and vapor-like mercury is impregnated into the filter 30 to be cooled and granulated. It becomes easy to discard and clean the filter.

The light emitting device of this filter type has an advantage that it can be made smaller than the exhaust duct type described above. Further, although the description has been made of the ultra-high pressure mercury lamp as the light source lamp here, the present invention can be applied to a low pressure mercury lamp and a xenon lamp.

[0033]

As described above, the present invention can be operated without arranging components for increasing the exhaust resistance, so that it can be operated without lowering the cooling efficiency, the power consumption is small and the size can be reduced. is there.

Further, by providing a means for collecting debris and harmful debris generated when the lamp is broken,
The effect is that it can be used safely without adversely affecting the environment.

[Brief description of the drawings]

FIG. 1 is a plan view and a cross-sectional view taken along the line AA of a light projecting device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view extracting and showing a shutter and a shutter opening / closing mechanism of FIG. 1;

FIG. 3 is a block diagram showing a power supply system to a lamp and a cooling control system of the floodlight device of FIG.

FIG. 4 is a flowchart for explaining the operation when the lamp is abnormal.

FIG. 5 is a time chart for explaining the operation when the lamp is abnormal.

FIGS. 6A and 6B are a plan view and a cross-sectional view taken along a line BB of a light projecting device according to another embodiment of the present invention.

FIG. 7 is a perspective view showing the filter insertion mechanism of FIG. 6;

FIG. 8 is a block diagram showing a power supply system to a lamp and a cooling control system of the floodlight device of FIG.

FIG. 9 is a time chart for explaining the operation when the lamp is abnormal.

FIG. 10 is a plan view showing an example of a conventional light emitting device, and FIG.
FIG. 3 is a sectional view taken along line C of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Intake fan 2 Ultra-high pressure mercury lamp 3 Exhaust fan 4 Box 5 Lens 6 Light source projection optical mechanism 7, 34 Opening 8 Exhaust port 9 Rotating shaft 10 Leaf spring 11, 37 Solenoid 12 Locking plate 13 Spindle 20 Exhaust duct 21 Shutter Opening / closing mechanism 22 Shutter 30 Filter 31 Filter insertion mechanism 32 Roll 33 Blind part 35 Guide rail 36 Spring 38 Hook 39 Support rod

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F21V 29/02 F21M 1/00 J G03B 21/16 7/00 H // F21Y 101: 00 L

Claims (6)

[Claims] 1. A light projecting device comprising: a light source lamp; a light source projecting optical mechanism for projecting light from the light source lamp to the outside of the device; and an exhaust fan for exhausting air that is sucked from outside the device and cools the light source lamp. An exhaust duct that guides the air exhausted by the exhaust fan to an exhaust port, and a shutter mechanism that closes the exhaust port to trap gas containing debris and harmful mercury generated when the light source lamp is damaged in the exhaust duct. A light projecting device comprising: 2. The floodlight device according to claim 1, wherein the exhaust duct extends forward from an opening of the exhaust fan located rearward, and the exhaust port is disposed forward. A shutter member having a rotating shaft at one end for opening and closing the exhaust port of the exhaust duct; a spring member for rotating the plate member by a repulsive force to close the exhaust port; A locking mechanism for rotating the plate member against the repulsive force of a spring member to forcibly open the exhaust port and lock the spring member, wherein the locking is performed by a signal generated when the light source lamp is damaged. 3. The light projecting device according to claim 1, wherein a mechanism is released, the plate member is rotated, and the exhaust port is closed. 4. A projection system comprising: a light source lamp; a light source projection optical mechanism for projecting light from the light source lamp to the outside of the apparatus; and an exhaust fan for exhausting air for cooling the light source lamp sucked from outside the apparatus to an exhaust port. The light device, further comprising: a filter insertion unit that inserts a filter member between the exhaust fan and the light source lamp for blocking a gas containing harmful mercury and fragments generated when the light source lamp is damaged. apparatus. 5. The light projecting device according to claim 4, wherein said filter member is a band-shaped member having one opening and a portion having no opening. 6. The filter insertion means includes a reel for winding the band-shaped member, and a locking member for preventing a force for pulling the band-shaped member by a repulsive force of a spring member. 6. The light projecting device according to claim 5, wherein the locking member is released by a generated signal, and is moved from the opening of the band-shaped member to a portion having no opening by a repulsive force of the spring member.