Image scanning apparatus

An image scanning apparatus comprising:

• a platen;
• a scanning unit including an image sensor and a carriage arranged to support the image sensor to scan an original document;
• a guide rail arranged to movably support the scanning unit along a vertical scanning direction;
• and
• a driving structure arranged to move the scanning unit alone the guide rail;
• wherein
• the carriage includes a slide block arranged to be guided by the guide rail and a carriage main body arranged to be mounted onto the slide block so that an angle adjustment mechanism is provided between the slide block and the carriage main body to adjust an angle of the carriage main body relative to the guide rail;
• the angle adjusting mechanism includes a fulcrum pin which is provided on either of the slide block or the carriage main body to rotatably support the carriage main body;
• a fastening structure is arranged to fix the carriage main body to the slide block with any angle around the fulcrum pin;
• the slide block is mounted on the guide rail in a standard position or an adjusting position in which the slide block is inverted by 180 degrees;
• when the slide block is in the standard position, the carriage main body is positioned on the slide block with a positioning structure provided between the slide block and the carriage main body;
• and
• when the slide block is in the adjusting position, the angle of the carriage main body is adjusted by swinging the carriage main body relative to the slide block upon the fulcrum pin.