JPH0965261A - Video equipment - Google Patents

Abstract

(57) Abstract: In a video device in which a lens cylinder portion protruding from a window of a main body device is vertically movable, there is a gap between the lens cylinder portion and the main body device supporting the lens cylinder portion. In the above, intrusion of dust or foreign matter entering through the gap is prevented, or even if it intrudes, it does not come into contact with or affect parts inside the main body device. A flange-shaped dustproof wall provided on a lens barrel closes a window of the main body device, or a tubular dustproof wall provided on the lens barrel and a cover block the inside and outside of the main body device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a movable lens barrel and a main body device that supports the lens barrel as in the relationship between the movable projection lens barrel and the main body in a liquid crystal video projector. In a video device with a gap between them, the present invention relates to a technique of a dustproof device that prevents dust or foreign matter from entering through the gap, or that even if it enters, it does not touch or affect parts inside the main unit Is.

[0002]

2. Description of the Related Art In recent years, in a liquid crystal video projector or the like, only a projection lens barrel for projecting an image can be moved up and down in a state where a main body device supporting the projection lens barrel for projecting an image is fixed. There is something.

The structure of the main body device, the projection lens barrel and its surroundings in the above conventional liquid crystal video projector will be described below with reference to the drawings. FIG. 8 is an exploded perspective view of a conventional liquid crystal video projector, and FIG. 9 is an external perspective view of the conventional liquid crystal video projector. Reference numeral 1 denotes an upper exterior part of a main body device 2 of the liquid crystal video projector, 3 Is a lower exterior part of the main body 2 of the liquid crystal video projector, 4 is housed inside the upper exterior part 1 and the lower exterior part 3, and the optical chassis 5 constitutes the projected image, and the base of the optical chassis 4 is supported by the optical chassis 4. The lens tip is a projection lens cylinder portion that is projected to the outside from the main body device window portion 6 formed by the upper exterior component 1 and the lower exterior component 3, and is for enlarging and projecting an image.

The liquid crystal video projector configured as described above will be described in more detail. The projection lens barrel portion 5 can be moved vertically with respect to the optical chassis 4 by using the upper and lower margins of the main body device window portion 6. It is attached so that The optical chassis 4 is attached to the lower exterior component 3 of the liquid crystal video projector main body 2, and the upper exterior component 1 of the liquid crystal video projector main body 2 is attached from above.

[0005]

However, in the configuration of the above-mentioned conventional liquid crystal video projector, in order to move the projection lens barrel portion 5 up and down, the main body device window portion 6, that is, the upper exterior component 1 and the projection lens. A large margin space must be provided around the projection lens barrel 5 between the barrel 5 and between the lower exterior component 3 and the projection lens barrel 5, and from this space the inside of the liquid crystal video projector main unit 2 There is a problem in that, when dust enters or foreign matter enters, internal parts may come into contact with or affect internal parts.

The present invention solves the above-mentioned conventional problems, and a dustproof structure having a structure in which dust or foreign matter does not enter the inside of the liquid crystal video projector main unit 2 from the space around the vertically moving projection lens barrel 5. A first object is to provide a video device equipped with the device. Further, it is a second object of the present invention to provide a video device equipped with a dustproof device having a structure such that even if a foreign substance enters the inside of the liquid crystal video projector main body device 2, it does not come into contact with or affect the internal parts. The purpose of.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned first object, an image device of the present invention comprises a collar-shaped dust-proof wall around the front of a lens barrel which moves vertically through a window of a main body device. The main body device window is closed by the brim-shaped dustproof wall when the lens barrel is moved up or down, so that the interior space of the main body device and the outside are blocked from dust and foreign matter.

According to another aspect of the present invention to achieve the above-mentioned second object, a cylindrical dust-proof wall is formed inside the main body device window of the main body device window through which the lens cylinder portion penetrates.
The open end of the cylindrical dustproof wall inside the main unit is covered with a cover made of a stretchable material, and the lens barrel penetrates through the cover, and the cylindrical dustproof wall and the cover separate the main unit internal space and the outside from dust and foreign matter. Even if dust or foreign matter enters the inside through the window, it can be prevented from coming into contact with or affecting the internal parts.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A case in which an image device of the present invention is a liquid crystal video projector will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1, 2 and 3 are an exploded external perspective view, an internal external perspective view and a partial sectional side view of a video device according to a first embodiment of the present invention. In the description of the above, the same reference numerals are given to the parts having the same configurations, functions, and effects as the parts in FIGS. 1
Is an upper exterior part of the main body device 2 of the liquid crystal video projector, 3 is a lower exterior part of the main body device 2 of the liquid crystal video projector, 4 is housed inside the upper exterior part 1 and the lower exterior part 3, and forms an image to be projected. Optical chassis, 5
Is supported by an optical chassis 4, and the lens tip is projected from a main body device window 6 formed by the upper exterior component 1 and the lower exterior component 3 to the outside to enlarge and project an image. Inside the main body device window portion 6 on the main body device 2 side, a dustproof wall in which the opening 8 of the projection lens cylinder portion 5 is fitted in a brim shape, 9 is a double-sided surface stuck inside the opening 8 of the dustproof wall 7. The adhesive tapes 10 are joints that push open when the dustproof wall 7 is attached to the projection lens cylinder 5 in a brim shape.

In the video device constructed as described above, the projection lens barrel 5 is attached to the optical chassis 4 so as to be movable up and down, and the optical chassis 4 is a liquid crystal video projector. It is attached to the lower exterior component 3 of the main body device 2, and the upper exterior component 1 of the liquid crystal video projector main body device 2 is attached from above. The dustproof wall 7 has a certain thickness, pushes the joint 10 open, and fits it around the front of the projection lens barrel 5, and the dustproof wall 7 has a circular opening 8 provided on the double-sided adhesive tape 9 to prevent dust. The wall 7 and the projection lens cylinder 5 are attached and fixed. When the projection lens barrel 5 moves up and down, the dustproof wall 7 attached to the projection lens barrel 5 with the double-sided adhesive tape 9 also moves up and down as a unit. Since it moves inside 6, the main body device window portion 6 is closed by the brim-shaped dustproof wall 7 regardless of whether the projection lens barrel portion 5 moves in the up or down direction, and the main body device 2 internal space and the outside are protected against dust and foreign matter. And to shut off.

It should be noted that the dustproof wall 7 can be formed without using the double-sided adhesive tape 9 as is apparent from the external perspective view of the dustproof wall shown in FIG. 4 and the internal external perspective view of the video device shown in FIG. A cylindrical mounting portion 11 that is integrally molded by protruding in a boss shape from an opening 8 of a dustproof wall 7 that is attached to the cylindrical portion 5 in a brim shape is fitted to the projection lens cylindrical portion 5 by pushing the joint 12 open. May be. Further, the dustproof wall 7 has a structure in which the joint portion 10 is pushed open and fitted around the projection lens cylinder portion 5, and then the dustproof wall 7 is joined at the joint portion 10 up and down. In this way, by providing the dustproof wall 7 that moves integrally with the movable projection lens barrel 5, dust and foreign matter can enter the inside of the liquid crystal video projector main unit 2 from the space around the projection lens barrel 5. It can be avoided and the first purpose can be achieved.

(Second Embodiment) FIGS. 6 and 7 are an exploded perspective view and a side sectional view of a part of a video device according to a second embodiment of the present invention. The parts having the same configurations, functions, and effects as those shown in FIGS. 8 and 9 are denoted by the same reference numerals. Reference numeral 1 denotes an upper exterior part of a main body device 2 of the liquid crystal video projector, 3 denotes a lower exterior part of the main body device 2 of the liquid crystal video projector, 4 denotes an upper exterior part 1 and a lower exterior part 3, and forms a projected image. Optical chassis, 5 is optical chassis 4
A projection lens barrel portion for supporting the base portion of the lens and projecting the lens tip to the outside from the main body device window portion 6 formed by the upper exterior component 1 and the lower exterior component 3 to enlarge and project the image;
Reference numeral 14 denotes an upper cylindrical cover and a lower cylindrical cover which are attached to the inside of the main body device window portion 6 on the main body device 2 side so as to form a cylindrical dustproof wall 15 through which the projection lens cylinder portion 5 penetrates. , 17 are upper and lower joints of the upper cylindrical cover 13 and the lower cylindrical cover 14, and 18 is a cover made of a stretchable material that closes the inner opening end 19 of the main body device 2 of the cylindrical dustproof wall 15, The projection lens cylinder portion 5 penetrates the cover 18, and the cylindrical dustproof wall 15 and the cover 18 block the space inside the main body device 2 from the outside with respect to dust and foreign matter. Even if foreign matter enters, it is possible to prevent contact with or influence on the internal parts.

In the video device configured as described above, the expansion / contraction cover 18 made of an elastic material such as silicon rubber is attached to the inside of the main body device 2 of the projection lens cylinder portion 5,
The lower cylindrical cover 14 is attached to the lower exterior component 3, and in this state, the projection lens barrel 5 and the optical chassis 4 are attached to the lower exterior component 3 of the liquid crystal video projector body. Next, the upper cylindrical cover 13 is attached to the projection lens barrel 5
Cover the lower cylindrical cover 14 from above and join the upper joint 1
6 and the lower joint 17 are attached. Upper cylindrical cover 1
3 and the lower cylindrical cover 14, the projection lens barrel 5 is provided with a cylindrical dustproof wall 15 that can move up and down, and the expansion cover 18 projects the upper cylindrical cover 13 and the lower cylindrical cover 14 into a projection. A space in the depth direction with the lens tube portion 5 can be sealed, and the second object can be achieved. It should be noted that the upper cylindrical cover 13 and the lower cylindrical cover 14 may not be separated, and may be covered with an integral type cover in which one side is the joint portion 10 like the dustproof wall 7 in the first embodiment.

[0015]

As described above, according to the video device of the present invention, in the structure in which the lens tube portion projecting from the window portion of the main body device is movable in the vertical direction, the dust tube is provided in the window portion, and thus the lens tube is provided. Section and the space around the main unit window,
It is possible to prevent dust or foreign matter from entering the inside of the main unit, and to prevent dust or foreign matter from entering the main unit from contacting or affecting internal parts. It is valid.

[Brief description of drawings]

FIG. 1 is an exploded external perspective view of a video device according to a first embodiment of the present invention.

FIG. 2 is an internal external perspective view of the video device according to the first embodiment of the present invention.

FIG. 3 is a side sectional view of a part of the video device according to the first embodiment of the present invention.

FIG. 4 is an external perspective view of a part of the video device according to the first embodiment of the present invention.

FIG. 5 is an internal external perspective view of the video device according to the first embodiment of the present invention.

FIG. 6 is an exploded perspective view of a part of the video device according to the second embodiment of the present invention.

FIG. 7 is a partial side sectional view of a video device according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a conventional video device.

FIG. 9 is an external perspective view of a conventional video device.

[Explanation of symbols]

 1 Upper Exterior Parts 2 Main Unit 3 Lower Exterior Parts 4 Optical Chassis 5 Projection Lens Tube 6 Main Unit Window 7 Collar-shaped Dustproof Wall 8 Opening 9 Double-sided Adhesive Tape 10, 12 Joint 11 Cylindrical Attachment 13 Upper Cylindrical Cover 14 Lower cylindrical cover 15 Cylindrical dustproof wall 16 Upper joint 17 Lower joint 18 Cover 19 Inner opening end

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shozo Aono 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. A collar-shaped dust-proof wall is attached to the inside of the main body device around the front of the lens barrel that moves up and down through the window of the main body so that the lens barrel moves up or down. Even in such cases, a video device that closes the window of the main unit with a brim-shaped dustproof wall to shut off the internal space of the main unit from the outside for dust and foreign matter. 2. A cylindrical dust-proof wall, through which the lens cylinder penetrates, is provided inside the main body of the main body device window through which the lens cylinder passes, and the opening end of the cylindrical dust-proof wall inside the main body is made of a stretchable material. The cover is closed, and the lens cylinder penetrates through the cover, and the cylindrical dustproof wall and the cover block the internal space of the main unit from the outside for dust and foreign matter, and even if dust and foreign matter enter the interior through the window A video device that does not touch parts or affect internal parts.