1. An induction cooking device, comprising:a top plate on which an object to be heated is to be placed;
a housing defining a top opening that opens to a top surface side of the housing and including a frame plate, the top opening accommodating the top plate, the frame plate being adhered to the top plate and supporting a bottom surface of the top plate;
a coil unit disposed inside the housing and pressed against the bottom surface of the top plate;
an engagement plate which is supported by a support plate, wherein the engagement plate having a first portion adhered to the bottom surface of the top plate, and a second portion of the engagement plate is shaped to maintain a predetermined distance spaced below the frame plate, such that both the engagement plate and the top plates are allowed to move upward together above the support plate, and the upward movement is limited to travel no more than the predetermined distance thus forming an upward movement locking mechanism for the top plate.