Abstract: An objective lens driver includes: a lens holder, for holding an objective lens; a first focusing coil, for moving one end of the lens holder in the focusing direction; a second focusing coil, for moving the other end of the lens holder in the focusing direction; a tracking coil assembly, for moving the lens holder in the tracking direction; and flexible members, which includes a first flexible member pair, for feeding a current to the first focusing foil, a second flexible member pair, for feeding a current to the second focusing coil, and a third flexible member pair, for feeding a current to the tracking coil assembly, wherein the lens holder is flexibly supported at a driver main body by the flexible members, and wherein the flexible members are arranged in a plurality of columns on both ends of the lens holder.

Abstract: A crank case 20 has a mission chamber 52 at a rear part, and a generator chamber 58 and a clutch chamber 59 are provided on both side of the crank case 20 in the direction of the crank shaft. The mission chamber 52 houses a transmission gear mechanism. The mission chamber 52 is bulged to one side in the direction of the crank shaft. A reverse idle gear 90 is disposed in the bulged part of the mission chamber 52. The reverse idle gear 90 is projected through a partition wall between the mission chamber 52 and the generator chamber 58 toward the generator chamber 58. The reverse idle gear shaft 44 has both ends supported by the left end wall 53a of the mission chamber and a shaft support member 66 secured to the end wall 53a.

Abstract: A crank case 20 has a mission chamber 52 at a rear part, and a generator chamber 58 and a clutch chamber 59 are provided on both side of the crank case 20 in the direction of the crank shaft. The mission chamber 52 houses a transmission gear mechanism. The mission chamber 52 is bulged to one side in the direction of the crank shaft. A reverse idle gear 90 is disposed in the bulged part of the mission chamber 52. The reverse idle gear 90 is projected through a partition wall between the mission chamber 52 and the generator chamber 58 toward the generator chamber 58. The reverse idle gear shaft 44 has both ends supported by the left end wall 53a of the mission chamber and a shaft support member 66 secured to the end wall 53a.

Abstract: An engine starter for starting an engine is provided with an overrunning clutch for transmitting the output torque of a starting motor to the crankshaft of the engine, having an outer ring formed integrally with a rotor holding rotary member having a boss fixedly put on an end portion of a crankshaft included in the engine, and holding a rotor included in a generator, an inner ring formed integrally with a driven member to be driven by the starting motor, and mounted on the end portion of the crankshaft for rotation relative to the crankshaft, and a clutch element interposed between the outer and the inner ring to transmit torque from the inner ring to the outer ring. A drive gear for driving an engine accessory is formed integrally with the rotor holding plate.

Abstract: An exhaust port is formed in the wall of a cylinder of a 2-cycle engine. At least one of the portions of the cylinder wall which define two vertically opposing edges of the exhaust port is projected at the circumferentially mid portion towards the opposing edge so as to provide a piston guide surface which conforms with the inner peripheral surface of the cylinder and which extends in such a manner as to reduce the axial height of the exhaust port. The piston guide surface serves to suppress vibration and noise caused when an upwardly moving piston falls into the exhaust port.

Abstract: A magnetic recording apparatus includes an arm, an airvane, a regulating member, and an urging member. The arm has a head slider including a magnetic head at a free end thereof, and is moved by an actuator device between a scan position and a stop position. The arm scans a surface of a disk for reading and/or writing information thereon at the scan position. The head slider is elastically supported on the arm by a flexure. The airvane is disposed adjacent to the disk, and is urged to a first position in opposition to a direction of air flow generated by rotation of the disk. The airvane moves in response to air flow generated by rotation of the disk to a second position in the direction of the air flow. The regulating member is provided at a position corresponding to the stop position of the arm and connected with the airvane.