Mounting device for circuit board

A mounting device for securing a circuit board to a bottom plate of a chassis comprising:

• a positioning post configured for being secured to the bottom plate and defining a groove;
• an installation member configured for being secured to the circuit board;
• a moving member slidably received in the installation member and comprising a first driving portion;
• a mounting member mounted to the installation member and preventing the moving member from sliding out of the installation member;
• and
• an operation member rotatably mounted to the moving member;
• wherein the mounting member comprises two resilient portions, the operation member is rotatable to the installation member to slide the moving member towards or away from the mounting member;
• the first driving member elastically deforms the two resilient portions to be received in the groove when the moving member is slid towards the mounting member to secure the mounting member to the positioning post;
• and the first driving portion is secured between the two resilient portions to prevent the moving member from sliding relative to the mounting member.