Patent ID: 8917519

Claim:
An electronic device comprising: a circuit substrate provided with an electronic circuit; a bottom case that is made of resin, has an opening portion at a top side, and receives and holds the circuit substrate; and a top case that has an opening portion at a bottom side, and is attached to the bottom case from the top side of the bottom case, wherein the circuit substrate has a plurality of slits penetrating through the circuit substrate, the bottom case has a groove portion positioned at an inside surface of the bottom case such that edge portions of the circuit substrate are slidable and inserted into the groove portion, and the bottom case is provided with a plurality of pin-shaped protrusion portions, each protrusion portion has a plurality of locking portions at a tip end portion, and each protrusion portion has a snib-shape and elastically biases the circuit substrate toward the top side of the bottom case and presses the circuit substrate to a top surface of the groove portion by locking the locking portions to the circuit substrate after the locking portions are respectively inserted into the slits from a top side of the circuit substrate.