Invention Grant
US08422093B2 Light projection unit, image reading device including same, and image forming apparatus including the image reading device
有权
光投影单元，包括其的图像读取装置和包括图像读取装置的图像形成装置
- Patent Title: Light projection unit, image reading device including same, and image forming apparatus including the image reading device
- Patent Title (中): 光投影单元，包括其的图像读取装置和包括图像读取装置的图像形成装置
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Application No.: US12659605Application Date: 2010-03-15
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Publication No.: US08422093B2Publication Date: 2013-04-16
- Inventor: Masatoshi Ishida
- Applicant: Masatoshi Ishida
- Applicant Address: JP Tokyo
- Assignee: Ricoh Company, Ltd.
- Current Assignee: Ricoh Company, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: JP2009-063189 20090316
- Main IPC: H04N1/04
- IPC: H04N1/04
Abstract:
A light projection unit includes a substrate, a plurality of light emitting elements arrayed on the substrate in a main scanning direction and including light emitting surfaces, a light guide facing the light emitting surfaces to direct light projected from the light emitting elements onto an illumination target and including a first positioning portion, and a holder including a second positioning portion that engages the first positioning portion of the light guide to position the light guide on the holder. The first positioning portion of the light guide is positioned between centers of light emission of adjacent light emitting elements in the main scanning direction of the substrate when the first positioning portion engages the second positioning portion of the holder.
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