| 摘要 |
PROBLEM TO BE SOLVED: To provide a compass/protractor-integrated ruler in which instruments of a compass, a protractor and a ruler are modified from a configuration and a structure and integrated so as to eliminate the need for changing or combining these instruments in the case of work using the compass, the protractor and the ruler, and also in a shape convenient for carrying around.SOLUTION: A compass/protractor-integrated ruler is provided with a "shaft part" for using a portion or all of the ruler as a rail and moving along the rail to function as the adjustment of a circle radius and the shaft of circular movement, and a "pen insertion opening" or a "pen fixing part" on an extension line of the rail. A circle can be drawn by this structure and a compass function can be integrated with the ruler. Also, the protractor is formed in a roller shape and is made compactly, and thereby the integration of a protractor function is also made possible.SELECTED DRAWING: Figure 1 |
