Magnet unit, elevator guiding apparatus and weighing apparatus

A magnet unit having an E-shaped configuration, comprising:

• a first magnetic pole;
• a second magnetic pole opposed to the first magnetic pole, the second magnetic pole having the same polarity as the first magnetic pole;
• a third magnetic pole arranged at a center between the first magnetic pole and the second magnetic pole, the third magnetic pole having a different polarity from the polarity of the first and second magnetic poles;
• a first magnet defined between the first magnetic pole and the third magnetic pole, the first magnet comprising a first electromagnet, a third electromagnet, and a first permanent magnet, the first electromagnet and the third electromagnet connected with each other through the intermediary of the first permanent magnet;
• and
• a second magnet defined between the second magnetic pole and the third magnetic pole, the second magnet comprising a second electromagnet, a fourth electromagnet, and a second permanent magnet, the second electromagnet and the fourth electromagnet connected with each other through the intermediary of the second permanent magnet, wherein
• the first and second permanent magnets are arranged on upper and lower sides of the E-shaped configuration of the magnet unit, respectively,
• the first permanent magnet is sandwiched between the first and third electromagnets, and
• the second permanent magnet is sandwiched between the second and fourth electromagnets.