Patent ID: 8604372

Claim:
An electronic device comprising: a shell defining a through hole; a circuit board comprising a connector mounted thereon; and a push button comprising: a button body depressibly engaged in the through hole; a rigid plate connected to the shell; a flexible circuit board arranged between the button body and the rigid plate and brought into contact with the rigid plate, the flexible circuit board being electrically connected to the connector and comprising a pair of normally-open contacts; and a conductive spring tab fixed to the flexible circuit board aligned with the button body, the conductive spring tab being deformable, the button body configured for being manually depressed to urge the conductive spring tab to deform and contact the pair of normally-open contacts, thereby generating a signal transmittable through the flexible circuit board to the connector; wherein the shell comprises a panel body and an elongated projection perpendicularly protruding from the panel body, the elongated projection comprises a sidewall and a number of spaced restriction members and protruding from the sidewall, each restriction member comprises a hook at its distal end, the hook is higher than the sidewall, a top surface and a bottom surface of the circuit board respectively abut against the sidewall and the hook.