| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lid opening and closing detection structure to prevent incorrect detection of lid opening and closing by a photoelectric sensor without spending man-hours. <P>SOLUTION: Light 15a projected from a projector 13 provided in an arm 11 of a support member 10 is received by a photo detector 14 provided in an arm 12 to detect the state where a lid is opened. A shading member 16 which intercepts or opens the light path between the projector 13 and the photo detector 14 with the opening and closing of a lid is integrally provided with the lid formed by a translucent member. The shading member 16 is composed of a shading part 17 extendedly provided in the light axis direction between the projector 13 and the photo detector 14 and light wraparound regulating parts 18A and 18B integrally formed so that they are perpendicular to the shading part 17. The thickness W1 of the shading part 17 is the same as the thicknesses W2 and W3 of the light wraparound regulating parts 18A and 18B. <P>COPYRIGHT: (C)2008,JPO&INPIT |
