| 摘要 |
<p>PURPOSE:To improve the reading accuracy of the shift value of an inputted marker by using the columnar bodies containing the 1st and 2nd bar codes in place of a slit disk. CONSTITUTION:A metallic or synthetic resin columnar body 16 containing a 1st bar code is coaxially attached around one of both end parts of a rotary shaft 13. Then many bar codes 17 are displayed on the outer circumferential surface of the body 16 in parallel to the lengthwise direction of the shaft 13. Meanwhile a metallic or synthetic resin columnar body 18 containing a 2nd bar code is attached around the other end part of the shaft 13. Then many ring-shaped bar codes 19 are displayed on the outer circumferential surface of the body 18 in the lengthwise direction of the body 18. The pitches and widths of both codes 17 and 19 are set at about 0.1mm, for example, through printing. Thus the information on the moved distance of a marker inputted with high accuracy is inputted to a computer main body.</p> |
