JPS6271611U

JPS6271611U -

Info

Publication number: JPS6271611U
Application number: JP16382985U
Authority: JP
Priority date: 1985-10-25
Filing date: 1985-10-25
Publication date: 1987-05-07

Description

[Brief explanation of the drawing]

第１図はこの考案に係るプロジエクタ用光学装
置をＣＲＴに取付けた状態を示す概略側面図、第
２図ａ及びｂは夫々この考案に係るプロジエクタ
用光学装置の封印手段を構成する円筒シール体及
び角形シール体を示す概略斜視図、第３図はこの
考案にかかるプロジエクタ用光学装置の保持体を
示す概略斜視図、第４図ａ及びｂは夫々プロジエ
クタを示す概略構成図及びＡ―Ａ矢視図、第５図
は従来型のプロジエクタ用光学装置を示す要部断
面図、第６図は従来型の封印手段を示す斜視図で
ある。７……ＣＲＴ、４……ＣＲＴホルダ、５……レ
ンズ群、３……レンズホルダ、６……ＣＲＴレン
ズ、２……保持体、Ｌ……液体、１……封印手段
、１ａ……円筒シール体、１ｂ……角形シール体
、４ｂ……（ＣＲＴホルダの）ガイド部、Ｓ……
螺室。 FIG. 1 is a schematic side view showing a state in which the optical device for a projector according to this invention is attached to a CRT, and FIGS. FIG. 3 is a schematic perspective view showing the holder of the optical device for a projector according to this invention; FIGS. 4 a and 4 b are a schematic diagram showing the projector and a view taken along arrow A-A. 5 is a sectional view of a main part of a conventional optical device for a projector, and FIG. 6 is a perspective view of a conventional sealing means. 7...CRT, 4...CRT holder, 5...Lens group, 3...Lens holder, 6...CRT lens, 2...Holder, L...Liquid, 1...Sealing means, 1a...Cylinder Seal body, 1b... Square seal body, 4b... Guide part (of CRT holder), S...
Spiral chamber.

Claims

[Claims for Utility Model Registration] A CRT holder fixed to a fixed part of a CRT;
A lens group consisting of a plurality of lenses, a lens holder that fixes and holds this lens group and is screwed onto the CRT holder, a CRT lens located between the front side of the CRT and the lens group, and this CRT lens. In order to fix and hold the lens, the space formed by the holder provided between the CRT holder and the lens holder, the CRT lens, the CRT holder, and the front surface of the CRT is filled with a lens having the same refractive index as the CRT lens. and a sealing means arranged to prevent the liquid from leaking between the CRT lens and the CRT holder and between the front surface of the CRT and the CRT holder, and the image on the CRT screen is enlarged and projected onto the screen. In the optical device for a projector, the sealing means includes a cylindrical sealing body or a sealing viscous body that prevents the liquid from leaking from between the CRT lens and the CRT, and a sealing member between the front side of the CRT and the CRT holder. The lens holder is configured with a rectangular sealing body or a sealing viscous body to prevent the liquid from leaking, and the peripheral edge of the proximal end of the lens holder is connected to the CRT.
An optical device for a projector, characterized in that the lens holder projects toward a guide portion of the holder by a certain dimension, and a screw chamber is formed between the lens holder and the CRT holder when the lens holder is attached to the CRT holder.