What is a magnetic base and how can it be assembled?

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Magnetic switch device,also commonly known as magnetic base, are device that use magnetic force to achieve fixing or adsorption functions.
By controlling the switch, the magnetic field can be turned on or off.
①When the handle is in the ON position, the magnetic poles are facing the two iron blocks.After the iron blocks are magnetized, the magnetic field effectively passes through the air gap at the top and bottom, and the magnetic base becomes magnetic.
②When the handle is in the OFF position, the magnetic lines form a closed magnetic circuit in the two iron blocks, resulting in the magnetic properties being shielded within the magnetic base.