【図面の簡単な説明】[Brief explanation of drawings] 第１図は本考案の一実施例の画像書き込み部を
示す断面図、第２図は本考案に係る印字リボン６
０を示す平面図、第３図は印字リボン６０のスリ
ツト部の詳細を示す平面図、第４図は従来の携帯
画像形成装置を示す斜視図、第５図及び第６図は
第４図の装置の正面断面図及び側面断面図である
。 ２……ケース本体、３……画像読み取り部、４
……画像書き込み部、５……制御部、８……読み
取り幅指定スライドスイツチ、１４……露光用光
源、５１……原稿面、１６Ａ，１６Ｂ，１６Ｆ，
１６Ｇ……レンズ、１６Ｅ……ズームレンズ、１
７……光電変換素子、１９……第１エンコーダ、
２０……第１回転検出器、２１……読み取り部フ
レーム、２４……サーマルヘツド、２８……書き
込み部フレーム、３３……カセツト、６０……印
字リボン、６１……インク部、６２……スリツト
部、６４……挿通孔、６５……テープカツタ、７
０……センサ部、７１……発光素子、７２……受
光素子、６２１……透光部、６２２……遮光部。 FIG. 1 is a sectional view showing an image writing section of an embodiment of the present invention, and FIG. 2 is a printing ribbon 6 according to the present invention.
3 is a plan view showing details of the slit portion of the printing ribbon 60, FIG. 4 is a perspective view showing a conventional portable image forming apparatus, and FIGS. 5 and 6 are the same as those shown in FIG. FIG. 3 is a front sectional view and a side sectional view of the device. 2...Case body, 3...Image reading section, 4
...Image writing unit, 5...Control unit, 8...Reading width specification slide switch, 14...Light source for exposure, 51...Document surface, 16A, 16B, 16F,
16G...lens, 16E...zoom lens, 1
7... Photoelectric conversion element, 19... First encoder,
20...First rotation detector, 21...Reading section frame, 24...Thermal head, 28...Writing section frame, 33...Cassette, 60...Printing ribbon, 61...Ink section, 62...Slit part, 64...insertion hole, 65...tape cutter, 7
0...sensor part, 71...light emitting element, 72...light receiving element, 621...light transmitting part, 622...light blocking part.