Function principle demonstration instrument

The utility model discloses a function principle demonstration instrument belongs to the mathematics field, and its structure includes: found chi, level bar, slide bar, hinge, horizontal pole, curve area, fastening bolt, founding the chi and be the ruler structure, stand the vertical setting of chi, the level bar be the level setting, found chi bottom and level bar left end and link firmly, the level bar follow length direction evenly be equipped with vertical to the square hole, the slide bar is square rectangular structure for the cross -section, and second section cooperation of slide bar is in level bar vertical is to the square hole, and the slide bar top is passed through the hinge with the horizontal pole right -hand member and is realized being connected, the horizontal pole is perpendicular setting with the slide bar, and the slide bar top links firmly through hinge and curve area middle part. The utility model discloses simple structure can the manual operation realizes the change of curve ribbon form, expresses different functional images, through the transform can coordinate figure time is up, the student that is more convenient for understands the function principle.