Electromagnetic induction type actuator device and mounting structure therefor and pda(Personal digital assistant)

A structure for mounting the electromagnetic induction actuator of this invention that has within a cylindrical housing, a magnetic circuit that comprises a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with the magnet, and a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being suspended within the housing by spring suspensions;

• a diaphragm, which attaches a voice coil on inward surface side, the voice coil projecting into the magnetic gap and the diaphragm extending inside the housing at an open side;
• metal terminals that are attached to a terminal block that projects outward from the side wall of the housing;
• and lead wires that electrically connect the voice coil and the metal terminals, and the structure is formed that connecting the metal terminals against the conduction pattern of a circuit board and providing in outer casing;
• in which there is the metal terminals attached to the terminal block is formed of leaf springs, and the metal terminals extend to the outward side of the housing that the side is opposite side of the open side of the housing in which the diaphragm is fitted and fixed, and there is a pad of elastic material is sandwiched between the open side of the housing and the surface of the circuit board on the side where the leaf metal terminals project, so that pressing the metal terminal against the conduction pattern of the circuit board forms an electrical connection to the circuit board.

An electromagnetic induction actuator that has, within a cylindrical housing, a magnetic circuit that comprises a pole piece and a magnet connected as one piece, and a yoke that holds the pole piece together with the magnet, and a magnetic gap formed between the yoke and the pole piece, the magnetic circuit being suspended within the housing by spring suspensions;

• a diaphragm, which attaches a voice coil on inward surface side, the voice coil projecting into the magnetic gap and the diaphragm extending inside the housing at an open side;
• metal terminals that are attached to a terminal block that projects outward from the side wall of the housing;
• and lead wires that electrically connect the voice coil and the metal terminals;
• in which the metal terminals are made of leaf springs, and the metal terminals comprise contact points that connect electrically to the conduction pattern of the circuit board are on the side where the diaphragm is mounted, and flat plates that are electrically connected to the voice coil lead wires being taken out to the outward side of the housing, additionally these wires are taken out to the side opposite the side where the diaphragm is mounted, and these wires are attached to leaf spring terminal fittings on the side opposite, the voice coil lead wires being divided by positive and negative polarity and electrically connecting the side where the diaphragm is mounted to the flat plates of the metal terminals, with the side where the diaphragm is mounted facing the surface of the circuit board, and mounted upside-down in the equipment case.