JPS63138760U

JPS63138760U -

Info

Publication number: JPS63138760U
Application number: JP3078787U
Authority: JP
Priority date: 1987-03-03
Filing date: 1987-03-03
Publication date: 1988-09-13

Description

[Brief explanation of the drawing]

第１図は本考案に係る原稿読取り装置の一実施
例を示す斜視図、第２図は同実施例を示す概略断
面図、第３図は放電管の管面温度変化に対する相
対光量の変化を示すグラフ、第４図は同実施例の
回路図、第５図は同実施例に適用される電極を複
数台備えた照明装置の構成図、第６図は本考案の
他の実施例を示す斜視図、第７図、第８図はそれ
ぞれさらに他の実施例を示す斜視図と概略断面図
、第９図は本考案の一実施例を複写機に適用した
概略断面図、第１０図、第１１図はそれぞれ高周
波電磁界により発光する照明手段の構成図、第１
２図ａ，ｂはそれぞれ照明手段のブロツク図、第
１３図は従来の原稿読取り装置を複写機に適用し
た概略断面図である。符号の説明、１０……放電管、１１……電極、
１……高周波印加手段、１２……シールドケース
、１６……開口部。 FIG. 1 is a perspective view showing an embodiment of a document reading device according to the present invention, FIG. 2 is a schematic cross-sectional view of the same embodiment, and FIG. 4 is a circuit diagram of the same embodiment, FIG. 5 is a configuration diagram of a lighting device equipped with a plurality of electrodes applied to the same embodiment, and FIG. 6 is a diagram showing another embodiment of the present invention. A perspective view, FIG. 7, and FIG. 8 are a perspective view and a schematic cross-sectional view showing still another embodiment, respectively. FIG. 9 is a schematic cross-sectional view in which one embodiment of the present invention is applied to a copying machine, and FIG. Figure 11 is a configuration diagram of the illumination means that emits light by a high-frequency electromagnetic field, and
2a and 2b are block diagrams of the illumination means, respectively, and FIG. 13 is a schematic sectional view of a conventional document reading device applied to a copying machine. Explanation of symbols, 10...discharge tube, 11...electrode,
1... High frequency application means, 12... Shield case, 16... Opening.

Claims

[Scope of utility model registration request]

An electrode is disposed near the outer periphery of a discharge tube that emits light by applying a high-frequency electromagnetic field, and a high-frequency power is supplied to the electrode by a high-frequency applying means to cause the discharge tube to emit light. In a document reading device that reads an image, the discharge tube, the electrode, and the high frequency application means constituting the illumination means are covered with a shield case, and the opening for light passage of the shield case is opposite to the scanning direction of the illumination means. A document reading device characterized in that it is formed in a direction.