Relay with SMA wire driven mechanism

A relay with shape memory alloy (SMA) wire driven mechanism, comprising:

• a main body having an accommodating space, wherein the accommodating space does not accommodate any coils therein and is at least formed by a securing member, a movable member and a base that encompass the accommodating space, wherein a top side of the movable member is movably disposed at the securing member, a bottom side of the movable member is suspended above the base, two conductive pieces are disposed at the movable member, an end of each of the two conductive pieces is connected with a power source, a pair of normally open securing terminals and a pair of normally closed securing terminals are disposed on the base, and another end of each of the two conductive pieces is respectively located between the pair of normally open securing terminals and the pair of normally closed securing terminals;
• and
• the SMA wire driven mechanism disposed inside or outside the accommodating space, comprising:
• a circuit board mounted at the securing member;
• and
• a SMA wire connected between the circuit board and the movable member;
• wherein when the SMA wire is heated, the SMA wire shrinks and deforms, and consequently, the two conductive pieces are moved toward one of the pair of normally open securing terminals or the pair of normally closed securing terminals,
• wherein when the SMA wire is not heated, the two conductive pieces leave one of the pair of normally open securing terminals or the pair of normally closed securing terminals.