Experiment and education system employing a plurality of units

摘要

The present invention is to easily and firmly secure a fixing object such as a mechanism constituent unit to a base material by employing magnetic force. For example, as shown in FIG. 3, when a mechanism constituent unit having a base is secured to a base material on a predetermined position, a fixture having a detachable mechanism inside itself is employed, and the fixture is disposed on a notch of the base in a non-adsorption state in which magnetic force lines of a permanent magnet of the detachable mechanism permeate the fixture. In this state, a rotation casing is rotated 90 degrees to be in a lock state, and a fixing casing is firmly adsorbed to the base material such that magnetic force of the permanent magnet inside it permeate to the base material side. Thus, the base that is an obj ect is firmly sandwiched by a pressing portion of the fixing casing and the base material, and the base is firmly secured to the base material on a predetermined position, so that fixing of a fixing object on the base material is realized.