Abstract: Provided is a prepreg capable of attaining thermal expansion coefficient reduction and elastic modulus increase without increasing the filling ratio of an inorganic filler therein and/or without using a resin having a low thermal expansion coefficient, and thereby capable of reducing warpage thereof. Specifically, provided is a prepreg containing glass fibers and a thermosetting resin composition, and containing a layer of plural glass fiber filaments aligned to run nearly parallel to each other in one direction. Also provided are a production method for the prepreg, a laminate containing the prepreg and its production method, a printed circuit board containing the laminate, and a semiconductor package having a semiconductor device mounted on the printed circuit board.

Abstract: Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision.

Abstract: Provided is a linear motion device having higher rigidity, higher load resistance, and superior guiding precision.

Abstract: An audio signal reproduction apparatus for reproducing scratch sound from an optical disk. Scratch reproduction operation is performed through use of a jog dial and a turntable. When either the jog dial or the turn table has been actuated, a rotational operation signal of the thus-actuated element is supplied to a main system controller of the apparatus. The main system controller detects a rotational direction and a rotational speed, which have been achieved at the time of scratching operation, on the basis of the rotational operation signal, thereby controlling reading of audio data from memory. The main system controller processes the rotational operation signal in accordance with a jog dial/turntable switching signal, thereby controlling reading of audio data such that the same scratching sound is output when the same rotational operation has been performed.

Abstract: A digital audio data reproducing system includes a digital audio data reproducing apparatus having a record medium, a detection part for the record medium and a processing unit; an analog record player; and a rotation detecting apparatus for sensing the speed and sense of revolution of an analog record. The rotation detecting apparatus is provided for easily controlling audio data in the other electrical appliances by an analog record in which audio data is stored. The scratch operation of the analog record together with the reproduction of the analog record by a player allows the rotation body to be rotated around a shaft in accordance with the rotation of the analog record. A rotary encoder senses the speed of revolution and the direction of rotation for the rotation body to output pulse signals, and the audio data in the data reproduction apparatus are scratch-controlled on the basis of the pulse signals.

Abstract: A reproducer can enhance detection accuracy with respect to a rotational motion according to a scratch operation and properly change a reproducing speed of a recording medium. A turntable of a scratch operating part comprises a disk-shaped mounting plate, which is made from metal, fixed on the upper end of a bushing, a ring-shaped grooved member fixed on a marginal area of the under surface of the mounting plate with mounting bolts, and a marginal member fixed on an outer area of the ring-shaped grooved member. A disk has a disk surface on rollers provided on the top surface of the turntable and a ring-shaped detected part located around an outer circumference of the disk surface and projecting from the under surface of the disk. A light receiving element supplies a signal with a frequency proportional to a period in which a concave part and a convex part pass according to the rotational speed of the disk.

Abstract: An audio signal reproduction apparatus for reproducing scratch sound from an optical disk. Scratch reproduction operation is performed through use of a jog dial and a turntable. When either the jog dial or the turn table has been actuated, a rotational operation signal of the thus-actuated element is supplied to a main system controller of the apparatus. The main system controller detects a rotational direction and a rotational speed, which have been achieved at the time of scratching operation, on the basis of the rotational operation signal, thereby controlling reading of audio data from memory. The main system controller processes the rotational operation signal in accordance with a jog dial/turntable switching signal, thereby controlling reading of audio data such that the same scratching sound is output when the same rotational operation has been performed.

Abstract: A membrane switch comprises a lower contact sheet having a first conductor, an upper contact sheet having a second conductor, and a spacer interposed therebetween. An application of a press force onto contact areas in the upper contact sheet causes the upper contact sheet to be bent, so that at least one of the contact areas and a corresponding contact area in the lower contact sheet come in contact with each other. The first and second conductors are always connected to each other, since a conductive area in the lower contact sheet is always in contact with a conductive area in the upper contact sheets. Hence, the contact of at least one of the contact areas with the corresponding contact area allows the membrane switch to turn on (ON) by a very small press force and therefore the reliability of the switch operation to be significantly enhanced.

Abstract: A digital audio data reproducing system comprises a digital audio data reproducing apparatus having a record medium, detection means for the record medium and processing unit; an analog record player; and a rotation detecting apparatus for sensing the speed and sense of revolution of a analog record. The rotation detecting apparatus is provided for easily controlling audio data in the other electrical appliances by an analog record in which audio data is stored. A rotation of a supporting element causes a slip preventing element to be tightly in contact with a thick portion of the analog record, thereby enabling a rotation body to become in a rotatable state with regard to the analog record by the frictional force between the slip preventing element and the analog record. The scratch operation of the analog record together with the reproduction of the analog record by a player allows the rotation body to be rotated around a shaft in accordance with the rotation of the analog record.

Abstract: A membrane switch comprises a lower contact sheet having a first conductor, an upper contact sheet having a second conductor, and a spacer interposed therebetween. An application of a press force onto contact areas in the upper contact sheet causes the upper contact sheet to be bent, so that at least one of the contact areas and a corresponding contact area in the lower contact sheet come in contact with each other. The first and second conductors are always connected to each other, since a conductive area in the lower contact sheet is always in contact with a conductive area in the upper contact sheets. Hence, the contact of at least one of the contact areas with the corresponding contact area allows the membrane switch to turn on (ON) by a very small press force and therefore the reliability of the switch operation to be significantly enhanced.

Abstract: A reproducer can enhance detection accuracy with respect to a rotational motion according to a scratch operation and properly change a reproducing speed of a recording medium. A turntable of a scratch operating part comprises a disk-shaped mounting plate, which is made from metal, fixed on the upper end of a bushing, a ring-shaped grooved member fixed on a marginal area of the under surface of the mounting plate with mounting bolts, and a marginal member fixed on an outer area of the ring-shaped grooved member. A disk has a disk surface on rollers provided on the top surface of the turntable and a ring-shaped detected part located around an outer circumference of the disk surface and projecting from the under surface of the disk. A light receiving element supplies a signal with a frequency proportional to a period in which a concave part and a convex part pass according to the rotational speed of the disk.