JPH0185723U

JPH0185723U -

Info

Publication number: JPH0185723U
Application number: JP17975087U
Authority: JP
Priority date: 1987-11-27
Filing date: 1987-11-27
Publication date: 1989-06-07

Description

[Brief explanation of the drawing]

第１図は本考案のオーバヘツドプロジエクタ（
ＯＨＰ装置）のランプハウス回転機構の実施例を
示す概略図、第２図は本考案の回転機構の斜視図
、第３図は本考案に類似するランプハウス回転機
構の概略図、第４図は同回転機構の斜視図、第５
図はランプハウスの角度調節機構の概略図、第６
図はランプハウスのレベル調整部の斜視図、第７
図はねじ式角度調整部の斜視図、第８図はランプ
ハウスの角度適正状態を示す図、第９図はランプ
ハウスの角度ズレの状態を示す図、第１０図は従
来のＯＨＰ装置の全体概略図、第１１図はランプ
ハウスを作用位置（投影位置）へ回転した時の状
態を示す図、第１２図はランプハウスを折りたた
んだ状態を示す図、第１３図は従来のランプハウ
スの回転機構の一例を示す図である。これらの図において、１０はＯＨＰ装置の本体
、１１は原稿面、１２はフレネルレンズ、１３は
ミラー、２０はアーム、２１はアーム回転軸、３
０はランプハウス、３１はランプハウス回転軸、
３１ａはカム部、３１ｃはラチエツト部、３２は
光源（ハロゲンランプ）、３６はツバ、４０はス
クリーン、３３はミラー、３４は投影用レンズ、
３５は投影用ミラー、４５は角度調整用ストツパ
、４６はストツパガイド、４７はストツパ、４８
はばね、５１はつめ、５２はつめ回転軸、５３は
解除レバー、５４は板ばね、６１は上部モールド
ケース、６２は下部モールドケース、６３は板金
筐体、６４は角度調整部、６５は角度調節ねじ、
６６はロツクナツト、７０は重り、７１は糸、７
２は引つ掛け部材、７６は調整片である。 Figure 1 shows the overhead projector of the present invention (
FIG. 2 is a perspective view of the rotation mechanism of the present invention, FIG. 3 is a schematic diagram of a lamp house rotation mechanism similar to the present invention, and FIG. Perspective view of the same rotation mechanism, No. 5
The figure is a schematic diagram of the angle adjustment mechanism of the lamp house.
The figure is a perspective view of the level adjustment section of the lamp house.
The figure is a perspective view of the screw type angle adjustment unit, Figure 8 is a diagram showing the proper angle of the lamp house, Figure 9 is a diagram showing the state of the lamp house angle deviation, and Figure 10 is the entire conventional OHP device. Schematic diagram, Fig. 11 shows the state when the lamp house is rotated to the operating position (projection position), Fig. 12 shows the state when the lamp house is folded, and Fig. 13 shows the rotation of the conventional lamp house. It is a figure showing an example of a mechanism. In these figures, 10 is the main body of the OHP device, 11 is the original surface, 12 is a Fresnel lens, 13 is a mirror, 20 is an arm, 21 is an arm rotation axis, 3
0 is the lamp house, 31 is the lamp house rotation axis,
31a is a cam part, 31c is a ratchet part, 32 is a light source (halogen lamp), 36 is a collar, 40 is a screen, 33 is a mirror, 34 is a projection lens,
35 is a projection mirror, 45 is a stopper for angle adjustment, 46 is a stopper guide, 47 is a stopper, 48
51 is a pawl, 52 is a pawl rotation shaft, 53 is a release lever, 54 is a leaf spring, 61 is an upper molded case, 62 is a lower molded case, 63 is a sheet metal casing, 64 is an angle adjustment part, 65 is an angle adjustment screw,
66 is a lock nut, 70 is a weight, 71 is a thread, 7
2 is a hook member, and 76 is an adjustment piece.

Claims

[Claims for Utility Model Registration] A main body 10, an arm 20 rotatably attached to the main body and capable of being held at a predetermined angular position,
A lamp house 30 is attached to the free end of the arm so that it can be rotated and held at a predetermined angular position, and with the arm and the lamp house held at a predetermined position, a light source 32 provided in the lamp house is provided.
The light from the main body is irradiated onto the document surface 11 on the main body through appropriate optical means, and can be further projected onto the screen 40 etc. through appropriate optical means. In a foldable overhead projector in which the lamp house can be rotated and folded, a ratchet portion 31c is formed on the shaft 31 fixed to the free end of the arm 20, and the shaft is attached to the lamp house frame 55 side. a pawl portion 52 that is engageable with a ratchet portion resiliently pressed by a spring means 54;
A release means 53 is provided for releasing the pawl from engagement with the ratchet, and the pawl is disengaged from the ratchet at a position where the lamp house rotates relative to the arm and the angle formed between the two becomes small. A lamp house rotation mechanism that engages with the arm and temporarily prevents rotation of the lamp house with respect to the arm.