| 摘要 |
PURPOSE: To accurately guide an ear sensor without damaging possibility adjustable internal inclination in contact with the ear sensor by providing a joint device of first parallelogrammatic guide with two joint axes which a second linked joint device extending in a special feature against a movable coupling member in a single axial joint device. CONSTITUTION: A ear sensor 8 is movable around a center of longitudinal axial line, and have a horizontal part 10 and contacting part 12. The contacting part 12 is fixed to an otocranial projected part located between the rear of the both ears. The ear sensor 8 has a mark 14 in the front, and a space position of the mark 14 is measured between scanning for a photographically measurements for drawing out the position of the mark 14 as to three dimensional geometry of a rear region of the ear as the result. A straight ruler 6 has a first parallelogrammatic guide 16 and second parallelogrammatic guide 18. A guide 18 has a second link 32, 34 having two pieces equally lengthened parallel-shape, and one end of the link 32, 34 is pivotally connected by a hinge to a movable connecting member 30, the other end of the link 32, 34 is pivotally connected to a connecting member 36. |
