Abstract: A noise suppressor for an apparatus having a cooling fan and cooling duct includes a muffler including a reflection plate for reflecting sound from the cooling fan, the reflection plate being provided at a position in the cooling duct confronting the intake plane of the cooling fan and formed substantially parallel to the intake plane. A sound-absorbing part of the muffler is provided on the reflection plate, and a distance d between the reflection plate and the intake plane is set such that d<c/(2×f) where f is the sound-absorption frequency of the muffler and c is the speed of sound.

Abstract: A magnetic head positioning mechanism is provided which is excellent in shock-resistance and can achieve high positioning accuracy. By constructing the magnetic head positioning mechanism so that a fine actuator section is composed of an actuator spring made from a thin steel plate, a base plate made from a thick steel plate to be junctioned to the actuator spring, stiffness of the fine actuator section in a vertical direction can be improved with flexibility of a driving spring section mounted on the actuator spring being still kept, that is, with sufficient positioning accuracy and satisfactory stroke being maintained. Moreover, by designing a strength of the fine actuator section so that the actuator spring and a holder arm do not overlap when the base plate is connected to the holder arm, the fine actuator section can be made thin and implementing of the fine actuator section among narrow plates in a positioning device is made easy.

Abstract: A magnetic head positioning mechanism is provided which is excellent in shock-resistance and can achieve high positioning accuracy. By constructing the magnetic head positioning mechanism so that a fine actuator section is composed of an actuator spring made from a thin steel plate, a base plate made from a thick steel plate to be Functioned to the actuator spring, stiffness of the fine actuator section in a vertical direction can be improved with flexibility of a driving spring section mounted on the actuator spring being still kept, that is, with sufficient positioning accuracy and satisfactory stroke being maintained. Moreover, by designing a strength of the fine actuator section so that the actuator spring and a holder arm do not overlap when the base plate is connected to the holder arm, the fine actuator section can be made thin and implementing of the fine actuator section among narrow plates in a positioning device is made easy.

Abstract: A projection display apparatus comprises a liquid crystal unit assembly which includes a liquid crystal panel, an incident side polarizing plate and an emitting side polarizing plate which are arranged on an incident side and on an emitting side of the liquid crystal panel, respectively, and a color combining prism. The apparatus further comprises a fan; a duct which is connected to the fan and which is provided with an opening for supplying cooling air, wherein the opening is arranged near the liquid crystal panel and the incident side polarizing plate; a holder for holding the emitting side polarizing plate and the color combining prism; and a heat exchanger which is connected to the holder, wherein the heat exchanger uses liquid coolant.

Abstract: A cooling apparatus comprises a tank for keeping a coolant liquid therein and having an air layer, a heat receiving element in contact with a heat generating part to receive heat therefrom, a radiator for radiating heat absorbed by a coolant liquid, and a circulating mechanism for circulating the coolant liquid from the heat receiving element through the tank and through the radiator again to the heat receiving element. The tank has a conduit forming area for forming a coolant liquid circulating conduit to pass through a middle position of the tank, and a narrow gap which divides the conduit forming area at the middle position of the tank.

Abstract: A liquid crystal projector apparatus has a liquid crystal unit having a liquid crystal panel for modulating light, an incident side polarizing plate and an exit side polarizing plate disposed in front of and behind the liquid crystal panel along the optical axis, respectively, a first holder member for holding the liquid crystal unit, a first heat exchanger disposed in close proximity to the first holder member for dissipating heat generated by the liquid crystal unit and then conducted to the first holder member using a coolant liquid which passes through a first channel formed inside the first heat exchanger, a pump for circulating the coolant liquid, and a radiator for cooling the coolant liquid.

Abstract: A magnetic head positioning mechanism is provided which is excellent in shock-resistance and can achieve high positioning accuracy. By constructing the magnetic head positioning mechanism so that a fine actuator section is composed of an actuator spring made from a thin steel plate, a base plate made from a thick steel plate to be Functioned to the actuator spring, stiffness of the fine actuator section in a vertical direction can be improved with flexibility of a driving spring section mounted on the actuator spring being still kept, that is, with sufficient positioning accuracy and satisfactory stroke being maintained. Moreover, by designing a strength of the fine actuator section so that the actuator spring and a holder arm do not overlap when the base plate is connected to the holder arm, the fine actuator section can be made thin and implementing of the fine actuator section among narrow plates in a positioning device is made easy.

Abstract: A magnetic head positioning mechanism is provided which is excellent in shock-resistance and can achieve high positioning accuracy. By constructing the magnetic head positioning mechanism so that a fine actuator section is composed of an actuator spring made from a thin steel plate, a base plate made from a thick steel plate to be junctioned to the actuator spring, stiffness of the fine actuator section in a vertical direction can be improved with flexibility of a driving spring section mounted on the actuator spring being still kept, that is, with sufficient positioning accuracy and satisfactory stroke being maintained. Moreover, by designing a strength of the fine actuator section so that the actuator spring and a holder arm do not overlap when the base plate is connected to the holder arm, the fine actuator section can be made thin and implementing of the fine actuator section among narrow plates in a positioning device is made easy.

Abstract: An analog beam-steering free-space optical switch for connecting and switching a plurality of optical signals includes a plurality of optical devices and electrostatic actuators for driving the optical devices. Each optical device is pivotally borne so as to allow rotation around a prescribed center of rotation, and each electrostatic actuator includes the substrate that holds the optical devices and a plurality of driving electrodes that are secured to the substrate. The application of electrostatic voltage between an optical device and the driving electrodes generates electrostatic driving torque for causing the optical device to tilt with respect to the substrate around the center of rotation, whereby the direction of reflection of an optical signal is changed. The plurality of driving electrodes are arranged in a radial pattern relative to the electrode center.

Abstract: A magnetic head positioner assembly comprises a plurality of magnetic head support members individually provided with magnetic heads, an arm, and a movable coil which is held by the movable coil support portion provided for the arm and which is provided to drive the arm. The arm has a plurality of holder arms for individually supporting each of the magnetic head support members and a rotatable bearing portion or the center of driving each of the holder arms. Moreover, the rotatable bearing portion and two holder arms are integrated with each other into an arm unit. The aforementioned arm is formed by combining and bonding at least two arm units with each other being spaced by a predetermined spacing.

Abstract: An analog beam-steering free-space optical switch for connecting and switching a plurality of optical signals includes a plurality of optical devices and electrostatic actuators for driving the optical devices. Each optical device is pivotally borne so as to allow rotation around a prescribed center of rotation, and each electrostatic actuator includes the substrate that holds the optical devices and a plurality of driving electrodes that are secured to the substrate. The application of electrostatic voltage between an optical device and the driving electrodes generates electrostatic driving torque for causing the optical device to tilt with respect to the substrate around the center of rotation, whereby the direction of reflection of an optical signal is changed. The plurality of driving electrodes are arranged in a radial pattern relative to the electrode center.

Abstract: A magnetic head positioner assembly comprises a plurality of magnetic head support members individually provided with magnetic heads, an arm, and a movable coil which is held by the movable coil support portion provided for the arm and which is provided to drive the arm. The arm has a plurality of holder arms for individually supporting each of the magnetic head support members and a rotatable bearing portion or the center of driving each of the holder arms. Moreover, the rotatable bearing portion and two holder arms are integrated with each other into an arm unit. The aforementioned arm is formed by combining and bonding at least two arm units with each other being spaced by a predetermined spacing.

Abstract: A magnetic head slider of the present invention includes a generally C-shaped leading rail extending from the leading edge of an air bearing surface and concave toward the trailing edge of the same. A pair of trailing rails extend from substantially the center of the concavity of “C” of the leading rail and flared away from each other toward the trailing edge. The trailing rails are spaced by a preselected distance from each other in the vicinity of the concavity of the trailing rail, then extend toward the trailing edge while bending away from each other, and then respectively extend toward the right and left ends of the trailing edge while sequentially increasing in width. Vacuum to be generated is controlled on the basis of the above distance and the bending angle of the trailing rails.

Abstract: The two-stage actuator comprises a fine actuator 2 with an HGA 1, and a coarse actuator 10, which supports the fine actuator 2 secured to it and is rotatably supported. The fine actuator 2 includes an I shape spring 3, a small coil 4 and a yoke 5. The coarse actuator 10 includes a yoke base 8 with permanent magnets 9, facing the small coil 4. The I shape spring 3 has a longitudinally intermediate portion secured to a set set pin member 7 of the coarse actuator 10. A drive force generated in the fine actuator 2 as a result of energizing the small coil 4 with current application thereto, causes flexing of a leaf spring part of the I shape spring 3, thus fine driving the HGA 12 disposed in the fine actuator 2.

Abstract: A magnetic head slider support mechanism includes a flexure, a load beam, and a tongue member. The flexure supports a slider on which a magnetic head is mounted. The load beam has one end connected to an actuator mechanism and the other end having the flexure and applies a load force to the slider. The load beam and the flexure are integrally formed by using one thin strip plate. The tongue member has a U-shaped cross-section and is bent from the strip plate toward the slider supported by the flexure. The tongue member has a distal end being in contact with a rear surface of the slider to support the slider.

Abstract: In a flying type magnetic head slider which has an air bearing surface and flies over a magnetic disk surface on an air film bearing, two rail portions having a U-shape and/or V-shape are formed on the air film bearing surface. These rail portions are in upstream and downstream sides of the air flow, respectively. Each rail is arranged such that its convex portion faces an air upstream side and a recessed region is formed in an air downstream side. By producing negative pressure in at least two recessed regions defined by the rail portions, variations in flying height at a position on a recording medium are suppressed. Further, by changing the depths of each recessed portion, the negative pressure is controlled and variations in pitch angle and roll angle are suppressed.

Abstract: A magnetic head slider of the present invention includes a generally C-shaped leading rail extending from the leading edge of an air bearing surface and concave toward the trailing edge of the same. A pair of trailing rails extend from substantially the center of the concavity of "C" of the leading rail and flared away from each other toward the trailing edge. The trailing rails are spaced by a preselected distance from each other in the vicinity of the concavity of the trailing rail, then extend toward the trailing edge while bending away from each other, and then respectively extend toward the right and left ends of the trailing edge while sequentially increasing in width. Vacuum to be generated is controlled on the basis of the above distance and the bending angle of the trailing rails.

Abstract: A magnetic head supporting mechanism having: a rectangular slider bearing member for bearing a slider loaded with a magnetic head; a flexure member, provided so as to surround the slider bearing member, for supporting the slider bearing member in one end section thereof through a joining site; and a long load beam sheet, provided so as to surround the flexure member, for supporting the flexure member through a predetermined holding site (a flexure arm), the joining site, provided between the slider bearing member and the flexure member, having spring properties, the slider bearing member being inclined to the load beam. This magnetic head supporting mechanism can ensure satisfactory impact resistance and satisfactory slider supporting rigidity and can provide a method for assembling a magnetic disk storage comprising the magnetic head supporting mechanism having the above excellent properties.

Abstract: A floating head slider has a pair of side rails and a central rail on a air bearing surface thereof. Each of the side rails has a first, leading region extending parallel to the longitudinal axis of the slider, a second, intermediate region extending from the first region and deviating from the direction of the longitudinal axis toward the other of the side rails, and a third, trailing region extending from the second region and further deviating from the direction of the first region. The directions of the first, second and third regions correspond to the direction of the air flow at the innermost track, intermediate track and the outermost track, to provide constant floating height and reduced roll. The central rail has a neck between a leading, small width region and a trailing, increasing width region.