Locking mechanisms, security devices, and security systems are provided. The security device may include a lock mechanism that is operated by electrical power transferred from an electronic key to the lock mechanism. The lock mechanism may include a flexible retaining member and a shape memory material operably engaged therewith. The flexible member is operably engaged with the shape memory material that is configured to change in shape in response to receiving electrical power and cause the flexible retaining member to flex to thereby unlock the lock mechanism.
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InVue Security Products Inc., "MERCHANDISE SECURITY DEVICES FOR USE WITH ELECTRONIC KEY", Technical Disclosure Commons, (October 30, 2019)