JPH0337435U - - Google Patents
Info
- Publication number
- JPH0337435U JPH0337435U JP9794589U JP9794589U JPH0337435U JP H0337435 U JPH0337435 U JP H0337435U JP 9794589 U JP9794589 U JP 9794589U JP 9794589 U JP9794589 U JP 9794589U JP H0337435 U JPH0337435 U JP H0337435U
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- power supply
- supply unit
- overhead projector
- translucent window
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Overhead Projectors And Projection Screens (AREA)
Description
第１図は本考案の主要部の構成を示す断面図、
第２図は本考案の電源回路を示す回路図、第３図
は本考案の全体構成を示す側面図、第４図はラン
プ部の構成を示す側面図、第５図は冷却部の詳細
を示す上面図、第６図はランプ装着時の主要部の
構成を示す断面図である。
１……筺体、２……原稿台、３，１１……ミラ
ー、４……ランプ、６……ソケツト、８……冷却
フアン、１０……レンズ、１５，１６……トラン
ジスタ、１８……出力用トランス、１９……発振
用トランス、２０，２１……コンデンサ、２３…
…抵抗、２４……ダイアツク、６０……ガイシ、
６３……ベース、６４……接触子、６４ａ，６４
ｃ……固定側接触子、６４ｂ……可動接触子、６
５……スプリング、６６……ガイドピン。
FIG. 1 is a sectional view showing the configuration of the main parts of the present invention.
Fig. 2 is a circuit diagram showing the power supply circuit of the present invention, Fig. 3 is a side view showing the overall configuration of the invention, Fig. 4 is a side view showing the structure of the lamp section, and Fig. 5 shows details of the cooling section. The top view shown in FIG. 6 is a sectional view showing the structure of the main parts when the lamp is installed. 1...Housing, 2...Document stand, 3, 11...Mirror, 4...Lamp, 6...Socket, 8...Cooling fan, 10...Lens, 15, 16...Transistor, 18...Output transformer, 19... oscillation transformer, 20, 21... capacitor, 23...
...Resistance, 24...Diac, 60...Insulator,
63...base, 64...contact, 64a, 64
c... Fixed side contact, 64b... Movable contact, 6
5... Spring, 66... Guide pin.
Claims (1)
透光窓に向けて照射し、その透光窓に設置された
原稿の原稿像を光学系によつてスクリーン面に投
影するオーバーヘツドプロジエクタにおいて、負
荷である前記ランプが接続されている状態下での
み起動が可能な高周波発振回路を用いてＡＣ−Ａ
Ｃ変換を行う電源部と、該電源部の出力電圧を前
記ランプに供給すると共に雰囲気温度が所定温度
以上のときに装着されたランプ端子の少なくとも
一方との接続を断つ接触子を有するソケツトと、
を具備することを特徴とするオーバーヘツドプロ
ジエクタ。 In an overhead projector, the light emitted by a built-in lamp is directed toward a translucent window that is a document placement section, and an image of the original placed in the translucent window is projected onto a screen surface using an optical system. AC-A using a high frequency oscillation circuit that can be started only when the lamp, which is a load, is connected.
a socket having a power supply unit that performs C conversion, and a contact that supplies the output voltage of the power supply unit to the lamp and disconnects from at least one of the attached lamp terminals when the ambient temperature is higher than a predetermined temperature;
An overhead projector comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9794589U JPH0337435U (en) | 1989-08-24 | 1989-08-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9794589U JPH0337435U (en) | 1989-08-24 | 1989-08-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0337435U true JPH0337435U (en) | 1991-04-11 |
Family
ID=31647064
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9794589U Pending JPH0337435U (en) | 1989-08-24 | 1989-08-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0337435U (en) |
-
1989
- 1989-08-24 JP JP9794589U patent/JPH0337435U/ja active Pending
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