JP2003315910A - Projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection device which is easy to handle and has high safety. <P>SOLUTION: A lamp is stored in a sheath part 20, and a projection lens 8 for projecting light from the lamp to a screen is provided on the sheath part 20. The sheath part 20 is provided with an exhaust port 10. The exhaust port 19 is provided with a louver 30 which can be opened and closed by a slide knob 9. Lighting of the lamp is permitted in accordance with the opening operation of the louver 30, and the lamp is lit when a power button 7a is depressed. The lamp is set to the non-lighting state in accordance with the closing operation of the louver 30, and the lamp is not lit though the power button 7a is depressed. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection device for enlarging and projecting an image, such as a liquid crystal projector.

[0002]

2. Description of the Related Art FIG. 10 is a perspective view showing the structure of a conventional projection apparatus 101, which is, for example, a liquid crystal projector. As shown in FIG. 10, a conventional projection device 101 is attached to an outer shell component 102, a projection lens 103 provided in the outer shell component 102, an exhaust port 104 provided in the outer shell component 102, and the outer shell component 102. ,
A duct 105 provided at the exhaust port 104 is provided.

FIG. 11 shows the outer part 102 to the duct 105.
It is a side view which shows the structure of the projection apparatus 101 when removing. As shown in FIG. 11, the outer shell component 102 is provided with a plurality of engagement holes 107 for mounting the duct 105, and each engagement hole 107 is arranged around the exhaust port 104. Further, at one end of the duct 105, an engagement piece 1 that engages with an engagement hole 107 provided in the outer shell component 102.
06 is provided.

Engagement holes 107 provided in the outer casing 102
The engaging piece 106 of the duct 105 is inserted into the
By rotating 5 the duct 105 can be attached to the shell part 102. Also, the duct 105
When removing the duct 105, the duct 105 is rotated in the direction opposite to that when the duct 105 is attached, and the engaging piece 106 provided on the duct 105 is disengaged from the engaging hole 107 provided on the outer shell component 102.

When the projection device 101 is operated and an image is enlarged and projected on a large screen through the projection lens 103, hot air is exhausted from the exhaust port 104 provided in the outer part 102. The duct 105 has a bellows structure, and is expandable and contractible. Therefore, by expanding or contracting the duct 105 or bending it, the exhaust port 104
The exhaust direction can be adjusted so that the hot air exhausted from the device does not hit the image viewer in the vicinity of the projection device 101. The details of the configuration and operation of the conventional projection device 101 are disclosed in Japanese Patent Laid-Open No. 9-319007.

[0006]

As described above, in the conventional projection apparatus 101, the duct 105 which is expandable and contractible is attached to the outside of the outer casing 102. Therefore, when carrying the projection apparatus 101 with the duct 105 attached, the duct 105 becomes an obstacle and the projection apparatus 101 is difficult to handle.

It is also possible to remove the duct 105 from the outer casing 102 when the projection device 101 is not used, and to separately handle the duct 105 and the outer casing 102 when carrying the projection device 101. But,
In this case, the duct 105 needs to be attached to the outer shell component 102 each time the projection device 101 is used, which is troublesome. In addition, the duct 105 may be lost.

Further, in the conventional projection device 101, since there is no means for closing the exhaust port 104 when it is not used, dust or the like may get inside the outer casing 102 while the projection device 101 is stored. was there. Therefore, there is a possibility that the projection device 101 may malfunction and the life may be shortened. Even if some means for blocking the exhaust port 104 is provided in the projection device 101, if the projection device 101 operates with the exhaust port 104 blocked, the outer shell part 102 is operated.
There was a safety issue because the hot air generated inside was not exhausted.

Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide a projection device which is easy to handle and has high safety.

[0010]

[Means for Solving the Problems] Claim 1 of the present invention
The projection device according to, and a lamp that is a light source for image projection,
The lamp control unit is provided with an outer shell component that houses a lamp control unit, an exhaust port provided in the outer shell component, and an openable / closable louver that is provided in the exhaust outlet and allows exhaust from the exhaust outlet. The section sets the lamp in a lightable state in association with the opening operation of the louver, and sets the lamp in a non-illuminated state in association with the closing operation of the louver.

The projection device according to a second aspect of the present invention is the projection device according to the first aspect, wherein the exhaust ports are provided at a plurality of positions of the outer shell component, and the louver is provided. It is provided at each of the exhaust ports.

A projection device according to a third aspect of the present invention is the projection device according to any one of the first and second aspects, wherein the opening angle of the blades forming the louver is Is less than 90 ° to the bottom.

[0013]

1 and 2 are perspective views showing the outer appearance of a projection apparatus 1 according to an embodiment of the present invention. The projection apparatus 1 is, for example, a liquid crystal projector. In the conventional projection device 101 described above, the exhaust direction is determined by the duct 105, but in the projection device 1 according to the present embodiment, the exhaust direction is determined by the openable / closable louver 30.
1 shows the projection device 1 when the louver 30 is opened, and FIG. 2 shows the projection device 1 when the louver 30 is closed.

As shown in FIGS. 1 and 2, an outer shell part 20 which constitutes the outer shape of the projection apparatus 1 is composed of an upper outer shell part 2, a lower outer shell part 3 and a rear outer shell part 4. A lamp (not shown) which is a light source for image projection is housed inside the outer shell component 20, and the outer shell component 20 is provided with a projection lens 8 for projecting light from the lamp onto the screen. Hereinafter, the side where the projection lens 8 is provided will be described as the front of the projection device 1.

A main power switch 6 is provided in front of one side surface of the upper shell component 2, and a power cord 5 is taken out from the front of one side surface of the lower shell component 3. A control panel 7 is provided on the upper surface of the upper outer component 2, and the control panel 7
Is provided with a power button 7a and a power indicator 7b showing the operating state of the projection apparatus 1. Hereinafter, the side where the main power switch 6 is provided and the power cord 5 is taken out will be described as the right side of the projection device 1.

An exhaust port 19 is provided in the rear side outer casing component 4 located behind the projection device 1. And the exhaust port 19
A louver 30 that can be opened and closed to allow exhaust from the exhaust port 19 is provided in the. Further, slide knobs 9 are provided on the left and right side surfaces of the rear outer shell component 4, and sliding the slide knob 9 downward opens the louver 30 as shown in FIG. The louver 30 is closed as shown in.

Next, the structure of the projection device 1 will be described in more detail. 3 and 4 show the projection device 1 according to the present embodiment.
FIG. 4 is a cross-sectional view showing the structure of the above, and illustrates the vicinity of the louver 30 provided. 3 is a sectional view when the louver 30 is opened, and FIG. 4 is a sectional view when the louver 30 is closed. 5 is an enlarged perspective view of the portion A shown in FIG. 1, and FIG. 6 is an exploded view of the structure shown in FIG. In the structure shown in FIGS. 5 and 6, the switch 21, the switch mounting screw 14, and the switch mounting screw hole 4e are provided only on the right side of the projection device 1, and other structures are symmetrical.

As shown in FIGS. 3 to 6, the louver 30 is composed of, for example, three blades 10 and a mounting plate 50 provided on each blade 10. The mounting plates 50 are, for example, elongated flat plates, and are provided at both ends of each wing plate 10 in the longitudinal direction. Specifically, at both ends in the longitudinal direction of the blade 10, one end face in the longitudinal direction of the mounting plate 50 is connected to the upper end in the lateral direction of the blade 10, and the blade 10 and the mounting plate 50 are connected. And are almost vertical. Further, the mounting plate 50 is arranged substantially parallel to the side surface of the rear outer shell component 4.

A lamp 23, an exhaust fan 15, a switch 21 having a switch button 21d, and a pair of arms 11 provided on the left and right rear sides of the projection device 1 are housed inside the outer casing part 20. . The exhaust fan 15 is arranged behind the lamp 23, and the arm 11 and the switch 21 are arranged behind the exhaust fan 15.

The arm 11 is, for example, an elongated flat plate,
Horizontally long arm guide holes 11a are provided at the upper end, the center, and the lower end in the longitudinal direction. Further, the arm 11 is provided with an arm positioning convex portion 11b between the upper end arm guide hole 11a and the central arm guide hole 11a. An arm attachment protrusion 11d is provided between the lower end portion and the arm guide hole 11a. And
The arm mounting projection 11d is provided with a slide knob mounting screw hole 11c.

On the left and right side surfaces of the rear side outer casing component 4, a vertically long arm slide hole 4d is provided at the center in the longitudinal direction thereof, and the arm attaching convex portion 11 of the arm 11 is formed.
d is the outer part 20 in the hole 4d for arm slide.
Is inserted from the inside. Then, from the outside of the outer shell component 20, the slide knob 9 is attached to the arm attachment protrusion 11d.
It is attached by a slide knob attaching screw 13. Specifically, the slide knob attaching screw 13 is provided on the slide knob 9 and the slide knob attaching hole 9 is provided.
The slide knob 9 is attached to the arm 11 by being screwed into the slide knob attachment screw hole 11c via a.

A louver rotation shaft 10a is provided at the upper end of the longitudinal end surface of each blade 10, and the longitudinal end of the mounting plate 50 opposite to the side connected to the blade 10 is provided. A louver guide shaft 50a is provided on the portion so as to project to the outside. Then, on the left and right side surfaces of the rear outer shell component 4, three louver rotation shaft holes 4a are provided in a line in the longitudinal direction at a predetermined distance, and the louver rotation shaft 10a is provided with the louver rotation shaft 10a. It is inserted in the rotary shaft hole 4a. As a result, the louver 30 is rotatably attached to the outer shell component 20. Also arm 11
Is located between the mounting plate 50 and the rear shell component 4, and the louver guide shaft 50a is inserted into the arm guide hole 11a of the arm 11. As a result, the louver 30 and the arm 11 are engaged.

The switch 21 is located below the arm 11, and is attached to the rear outer part 4 with the switch mounting screw 14 from the inside of the outer part 20 so that the switch button 21d is located on the arm 11 side. There is. Specifically, a switch mounting screw hole 4e is provided below the right side surface of the rear outer shell component 4, and the switch mounting screw 14 is inserted through the switch mounting hole 21e provided in the switch 21. Then, the switch 21 is attached to the rear outer shell component 4 by being screwed into the switch attachment screw hole 4e.

The rear outer shell component 4 is located above the arm slide holes 4d on the left and right side surfaces of the rear outer shell component 4.
Arm upper positioning recess 4b recessed from inside
And an arm lower positioning recess 4c.
When the louver 30 is opened or closed, the arm positioning protrusion 11b of the arm 11 is fitted into the arm upper positioning recess 4b or the arm lower positioning recess 4c.

Next, the opening / closing operation of the louver 30 will be described. When the slide knob 9 is slid downward from the state where the louver 30 is closed, the arm 11 moves downward. At this time, the louver guide shaft 5 of the mounting plate 50
Since 0a is inserted into the arm guide hole 11a of the arm 11, a downward force is applied to the longitudinal end of the mounting plate 50 on the side opposite to the side connected to the blade 10. Since the louver rotation shaft 10a of the louver plate 10 is inserted into the louver rotation shaft hole 4a of the rear outer casing component 4, when the downward force is applied to the mounting plate 50, the louver plate 10 and the mounting plate 50 are separated from each other. The louver 30 is opened by rotating around the rotary shaft 10a (louver rotary shaft hole 4a). The shape of the arm guide hole 11a of the arm 11 is horizontally long, and the louver guide shaft 50 of the mounting plate 50 is formed.
a can move in the arm guide hole 11a. Therefore, the blade 10 and the mounting plate 50 can rotate around the louver rotation shaft 10a (louver rotation shaft hole 4a).

When the arm 11 moves downward and the arm positioning projection 11b of the arm 11 fits into the arm lower positioning recess 4c of the rear shell component 4, the blade 10 and the mounting plate 50 rotate. Stops, louver 30
Will not open anymore. That is, the louver 30 is in the maximum open state. The opening angle of the blade 10 at this time is less than 90 ° with respect to the lower side. Specifically, as shown in FIGS. 3 and 5, when the louver 30 is fully opened, the blade 10 extends downward of the outer shell component 20 and includes the blade 10 and the exhaust port 19. The angle α formed by the surface, that is, the opening angle is less than 90 °. At this time, as shown in FIG. 3, the arm 11 is pushing the switch button 21d of the switch 21.

On the other hand, when the slide knob 9 is slid upward with the louver 30 open, the arm 11 moves upward. At this time, an upward force is applied to the end of the mounting plate 50 in the longitudinal direction on the side opposite to the side connected to the blade 10. When the upward force is applied to the mounting plate 50, the wing plate 10 and the mounting plate 50 rotate about the louver rotation shaft 10a (louver rotation shaft hole 4a) in the opposite direction to that when the louver 30 opens. Then, when the arm 11 moves upward and the arm positioning projection 11b of the arm 11 fits into the arm upper positioning recess 4b of the rear outer shell component 4, the blade 10 and the mounting plate 50.
Rotation of the louver is stopped and the louver 30 is closed. At this time, as shown in FIG. 4, the arm 11 does not press the switch button 21d of the switch 21.

Next, the lighting operation and the extinguishing operation of the lamp 23 in the projection device 1 will be described. FIG. 7 is an explanatory diagram showing the extinguishing operation of the lamp 23 in the projection device 1, and FIG. 8 is an explanatory diagram showing the lighting operation of the lamp 23 in the projection device 1.

As shown in FIGS. 7 and 8, the projection device 1 further includes a lamp controller 25. The lamp control unit 25 includes the above-mentioned switch 21, and besides that, a power supply circuit 22 for supplying power to the lamp 23 and a power supply circuit 22.
And a control circuit 24 for driving the switch 21 and connected to the contact 21c of the switch 21. Lamp control unit 2
In No. 5, the lamp 23 can be turned on in association with the opening operation of the louver 30, and the lamp 23 is turned off in association with the closing operation of the louver 30.

The projection device 1 further includes an internal power supply 40 and a power switch 17. The internal power supply 40 is connected to the contact 17a of the power switch 17, and the contact 17c of the power switch 17 is connected to the contact 21a of the switch 21. The lamp control unit 25 and the internal power supply 40
The power switch 17 is housed in the outer casing 20.

When the projection device 1 is operated, first, the power cord 5 is inserted into a predetermined power outlet (not shown) and the main power switch 6 is turned on, so that the projection device 1 enters the standby state.

When the louver 30 is closed, the switch button 21d of the switch 21 is moved to the arm 1 as shown in FIG.
The switch piece 21f of the switch 21 is not pushed by 1, and is tilted toward the contact 21b by the automatic restoring force.
Therefore, the contact 21b and the contact 21c are connected.

When the slide knob 9 is slid downward, the switch button 21d of the switch 21 is pushed by the arm 11 as shown in FIG. Piece 21
f falls to the contact 21a side. As a result, the contact 21a and the contact 21c are connected to each other, and the lamp 23 can be turned on.

Next, when the power button 7a is pressed, the power switch 1
The switch piece 17d of No. 7 falls to the contact 17a side, and the contact 1
7a and contact 17c are connected. As a result, a predetermined voltage is supplied from the internal power supply 40 to the control circuit 24 via the power switch 17 and the switch 21. Then, the control circuit 24 supplied with the voltage drives the power supply circuit 22 to turn on the lamp 23. At this time, the power supply indicator 7b of the control panel 7 is turned on to indicate the operation state of the projection device 1.

The light when the lamp 23 is turned on is projected from the projection lens 8 onto the screen through a condenser lens, a liquid crystal plate and the like (not shown). Then, when the projection device 1 is operated to enlarge and project the image on the large screen through the projection lens 8, the exhaust fan 15 rotates and hot air is exhausted from the exhaust port 19 through the louver 30. Here, the arrow 28 in FIG. 3 described above indicates the exhaust direction in the projection device 1. As indicated by an arrow 28, the exhaust from the exhaust port 19 is performed downward of the outer shell component 20.

When the power button 7a is pressed again, the switch piece 17d of the power switch 17 falls to the contact 17b side, and the contact 17b and the contact 17c are connected. Therefore, no voltage is supplied to the control circuit 24, and the control circuit 24 cannot drive the power supply circuit 22. As a result, the lamp 23 is turned off. When the louver 30 is opened while the switch piece 17d of the power switch 17 is tilted to the contact 17a side, the lamp 23 is turned on without pressing the power button 7a. In this specification, such a case is also referred to as a "lightable state".
That is, the switch piece 17d of the power switch 17 has the contact 1
Regardless of whether the lamp is tilted toward the 7a side or the contact point 17b side, the lamp control unit 25 sets the lamp 23 in the lightable state in synchronization with the opening operation of the louver 30.

On the other hand, when the slide knob 9 is slid upward from the state where the louver 30 is opened, the arm 11 is moved as shown in FIG.
The pressing of the switch button 21d by is released, and the switch piece 21f automatically returns and falls to the contact 21b side. As a result, the contact 21b and the contact 21c are connected, and the lamp 23 is turned off. In this state, even if the power button 7a is pressed, no voltage is supplied to the control circuit 24 and the lamp 23 does not light. When the louver 30 is closed while the lamp 23 is on, the lamp 23
Needless to say, turns off.

As described above, in the projection device 1 according to this embodiment, the louver 30 can be opened and closed, so that the louver 30 can be closed when the projection device 1 is not used.
Therefore, the user can handle the projection device more easily than when the duct 105 is attached to the exhaust port 104 outside the outer casing 102 as in the conventional projection device 101 described above.

Further, since the lamp 23 can be turned on or off in association with the opening / closing operation of the louver 30, the lamp 23 can be turned on when the exhaust is not performed, that is, the louver 30 is closed. Can be prevented. When the lamp 23 is turned on while the louver 30 is closed, the hot air generated inside the outer casing component 20 is not discharged to the outside, so that the temperature of the projection device rises and the projection device may be damaged. In the projection device 1 according to the present embodiment, it is possible to prevent the lamp 23 from turning on in the state where the exhaust is not performed, so that the safety is improved. In other words, it is possible to provide a highly safe projection device.

Further, as shown in FIGS. 3 and 5, since the opening angle (angle α) of the blade 10 constituting the louver 30 is less than 90 ° to the lower side, the angle α is 90 ° or more. As compared with the case, it is possible to reduce the leakage of the light generated in the lamp 23 from the exhaust port 19. Further, since the exhaust from the exhaust port 19 is performed toward the lower side of the outer shell component 20, when the projection device 1 is used at a relatively low position,
It is possible to reduce that the discharged hot air hits the faces and the like of surrounding people.

In this embodiment, the exhaust port 19 is provided only on the rear side outer shell part 4 of the outer shell part 20, but the exhaust ports 19 are provided at a plurality of locations on the outer shell part 20, and each exhaust port 19 is provided.
A louver 30 that can be opened and closed may be provided. For example, it may be provided not only on the rear outer shell component 4 but also on the side surface of the upper outer shell component 2 or on the side surface of the lower outer shell component 3. At that time, unless all the louvers 30 are opened, the lamp control unit 2 prevents the lamp 23 from being ready to be turned on.
5 or the like, or at least one louver 3
The lamp control unit 25 and the like may be configured so that the lamp 23 is turned on when 0 is opened. In other words, if only one louver 30 is closed, the lamp 23
May be in a non-lighting state, or the lamp 23 may be in a non-lighting state unless all the louvers 30 are closed.

Specifically, the lamp control unit 25 and the like are provided for each louver 30. When the switches 21 of the lamp control units 25 are connected in series, all the louvers 30 are connected.
If is not opened, the lamp 23 cannot be turned on.
When connected in parallel, at least one louver 3
When 0 is opened, the lamp 23 is ready for lighting.

Thus, the exhaust port 19 and the louver 30 are
By providing the outer component 20 at a plurality of locations, it is possible to perform exhaust at a plurality of locations. Therefore, exhaust can be sufficiently performed.

Further, in the present embodiment, the rear side outer casing component 4
Although the louvers 30 are provided over the entire surface of 0, the louvers 30 may be divided and a plurality of louvers 30 may be provided in the rear outer shell component 4.

Further, in the present embodiment, the lamp 23 is basically turned on and off by the power button 7a, but the lamp 23 is turned on and off only by opening and closing the louver 30 without providing the power button 7a. You may turn off the lights. FIG. 9 is a block diagram showing the configuration of the lamp control unit 25 when the lamp 23 is turned on and off only by opening and closing the louver 30. Figure 9
As shown in FIG.
By directly connecting to a, the lamp 23 can be turned on and off only by opening and closing the louver 30.

[0046]

According to the projection device of the first aspect of the present invention, the louver can be opened and closed, so that the louver can be closed when the projection device is not in use. Therefore, the user can handle the projection device more easily than when the duct is attached to the exhaust port outside the outer casing part.

Further, since the lamp can be turned on and off in association with the opening and closing operation of the louver, it is possible to prevent the lamp from being turned on when exhaust is not performed, that is, when the louver is closed. You can Therefore, safety is improved.

Further, according to the projection device of the second aspect of the present invention, since the exhaust port and the louver are provided at a plurality of positions of the outer part, the exhaust can be performed at a plurality of positions. Therefore, exhaust can be sufficiently performed.

According to the projection device of the third aspect of the present invention, since the opening angle of the louver forming the louver is less than 90 ° to the lower side, the opening angle is 90 ° or more. The leakage of the light generated in the lamp from the exhaust port can be reduced. Further, since the exhaust air is exhausted from the exhaust port toward the lower part of the outer casing, when the projection device is used at a relatively low position, it is necessary to reduce the exhausted hot air from hitting the faces of other people. You can

[Brief description of drawings]

FIG. 1 is a perspective view showing an appearance of a projection device 1 according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the outer appearance of the projection device 1 according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view showing the structure of the projection device 1 according to the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing the structure of the projection device 1 according to the embodiment of the present invention.

FIG. 5 is a perspective view showing the outer appearance of the projection device 1 according to the embodiment of the present invention.

FIG. 6 is an exploded view showing the structure of the projection device 1 according to the embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a light-off operation of the lamp 23 in the projection device 1 according to the embodiment of the present invention.

FIG. 8 is an explanatory diagram showing a lighting operation of the lamp 23 in the projection device 1 according to the embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a lamp control unit 25 in the projection device 1 according to the embodiment of the present invention.

FIG. 10 is a perspective view showing a configuration of a conventional projection device 101.

FIG. 11 is a side view showing the configuration of a conventional projection device 101.

[Explanation of symbols]

1 projection device, 8 projection lens, 10 blades, 19 exhaust port, 20 outer parts, 25 lamp control section, 30 louver.

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2K103 AA16 AB10 BA13 CA06 CA12                       CA64 DA02 DA08 DA19 DA26                 5C058 BA35 EA02 EA12 EA26 EA52

Claims (3)

[Claims] 1. An outer casing that houses a lamp that is a light source for image projection and a lamp control unit, an exhaust port provided in the outer casing, an exhaust port provided in the exhaust port, and exhaust gas from the exhaust port. And a louver that can be opened and closed to enable the lamp to be turned on in association with an operation of opening the louver, and a non-illuminated state of the lamp in conjunction with an operation to close the louver. A projection device. 2. The projection device according to claim 1, wherein the exhaust ports are provided at a plurality of positions of the outer shell component, and the louvers are provided at each of the exhaust ports. 3. The louver forming the louver has an opening angle of less than 90 ° with respect to the lower side.
The projection device according to any one of 1.