摘要:
A recording and/or reproducing apparatus using a magnetic tape as a recording medium such that, when holding by a holding mechanism is released at the position where a cover member is closed and a magnetic head is moved between a contact position, where contact with a magnetic tape which travels by a traveling mechanism provided in the apparatus body is obtained, to a position distant from the magnetic tape or when the magnetic tape is pinched by the traveling mechanism, the pinching of the magnetic tape by the traveling mechanism is released and the magnetic head is moved to a distant position. In this manner, even if the apparatus is stopped when the power source is shut off while the FWD reproducing mode or the REV reproducing mode is kept set, the magnetic tape can be safely and securely extracted from the attachment section.
摘要:
A low-profile chucking mechanism holds a disc recording medium on a turntable that has a plurality of first engaging teeth and a plurality of second engaging teeth. When the disc recording medium is to be mounted on a disc supporting surface of the turntable, the first engaging teeth are pushed radially inwardly of the rotational axis of the turntable by the edge of a central circular hole of the disc recording medium. When the first engaging teeth are moved, the second engaging teeth are biased in ganged relation to the first engaging teeth radially outwardly of the rotational axis of the turntable and engage the edge of the central circular hole of the disc recording medium mounted on the disc supporting surface, thereby pressing and holding the disc recording medium against the disc supporting surface.
摘要:
An objective lens driving biaxial actuator for driving an objective lens in both a focusing direction and a tracking direction with respect to a recording medium. The biaxial actuator comprises: a movable portion for holding the objective lens; an elastic member having its one end attached to the movable portion for movably supporting the movable portion; a stationary portion fixing the other end of the elastic member; and a balancer disposed at the side of the stationary portion with respect to the objective lens and carried on the movable portion at such a distance that its clearance from the stationary portion may restrict the deformation of the elastic member within an elastic limit. A hinge is interposed between the elastic member and the movable portion for moving the objective lens in the tracking direction.
摘要:
A reactor tube for thermally cracking or reforming hydrocarbons comprising an outer tube member made of Ni-containing heat resisting material and having enhanced mechanical strength with a large wall thickness, and an inner tube member of small wall thickness fitted in the outer tube member and made of heat resisting material free from Ni or with a low Ni content. The inner and outer tube members have been subjected to a diffusion treatment with a thin coating of Ni-P solid solution provided at the junction therebetween and thereby bonded together.
摘要:
A magnetic head chip bonding device for bonding plural magnetic head chip to a base member to produce a composite type magnetic head is disclosed. The device includes a magnetic head chip retention unit for applying the pressure to the magnetic head chip for applying the magnetic head chip against the base member, and a magnetic head chip holding unit for holding the magnetic head chip. The device also includes a magnetic head chip detection unit for detecting the position of the magnetic head chip and a magnetic head chip shifting unit for shifting the magnetic head chip and the magnetic head chip holding unit responsive to an output of the magnetic head chip position detection unit. The pressure exerted by the magnetic head chip retention unit on the magnetic head chip is preferably variable, and the magnetic head chip holding unit preferably is made up of a pair of supporting members clamping the magnetic head chip in- between. The device renders it possible to bond the magnetic head chips to the base member in position without requiring operation skill.
摘要:
The present invention is directed to a thin film magnetic head and its manufacturing method. A slider 1 is provided with base body surfaces 13 and 14 at its surface facing opposite a medium. An inductive thin film magnetic transducer 2 is provided with a first pole tip P1 and a second pole tip P2 whose front ends emerge at the base body surfaces 13 and 14 and indented portions 4 and 5 provided at the base body surfaces 13 and 14. A protective film 10 covers the base body surfaces 13 and 14 and indented portions 4 and 5. The thickness of the protective film 10 at the indented portions 4 and 5 is larger than the thickness at the base body surfaces 13 and 14. The magnetic films constituting the pole tips P1 and P2 can thus be reliably protected from oxidation, corrosion and the like, while minimizing the spacing loss.
摘要:
A lens moving apparatus of the present invention is used in an optical pickup of, for example, an optical recording/reproducing system. The apparatus includes a moving assembly holding an objective lens and provided with a coil bobbin, elastic supporting devices which support the moving assembly along the focusing dimension and the tracking dimension, focusing coils and tracking coils wound on the coil bobbin, and a magnetic circuit formed by a yoke and a magnet. The center of gravity of the moving assembly is positioned so that the product of the distance from an effective section of the focusing coil to the center of gravity of the moving assembly and the force produced at the effective section is about equal to the product of the distance from a noneffective section of the focusing coil to the center of gravity of the moving assembly and the force produced at the noneffective section.
摘要:
An objective lens driving device used in an optical recording and/or reproduction apparatus comprises a lens holder, elastic supporting members, a coil bobbin and a yoke. An objective lens is mounted in the lens holder. The elastic supporting members have one end attached to the lens holder and the other end attached to a mounting part. The elastic supporting members support the lens holder movably in a direction parallel to the optical axis of the objective lens and in a plane perpendicular to the optical axis. A coil for focusing and coils for tracking are wound on the coil bobbin. A magnet is mounted on the yoke, and the width of this magnet is selected so that flux from the magnet acts only on effective portions of the coils for tracking.
摘要:
A low-profile chucking mechanism holds a disc recording medium on a turntable that has a plurality of first engaging teeth and a plurality of second engaging teeth. When the disc recording medium is to be mounted on a disc supporting surface of the turntable, the first engaging teeth are pushed radially inwardly of the rotational axis of the turntable by the edge of a central circular hole of the disc recording medium. When the first engaging teeth are moved, the second engaging teeth are biased in ganged relation to the first engaging teeth radially outwardly of the rotational axis of the turntable and engage the edge of the central circular hole of the disc recording medium mounted on the disc supporting surface, thereby pressing and holding the disc recording medium against the disc supporting surface.
摘要:
A non-aqueous electrolyte cell is to be reduced in its projection area in a portable electronic equipment. A unit cell is housed in an exterior packaging material of a laminated film, formed with a spacing by deep drawing, and in which electrode terminal leads electrically connected to respective electrodes of the unit cell are led out to outside from the inside of the exterior packaging material. The exterior packaging material is heat-fused around the spacing formed by deep drawing, with the heat-fused portion of said exterior packaging material being folded on itself except the heat-fused portion of said exterior packaging material from which are led out said electrode terminal leads. The folded exterior packaging material is immobilized by the dielectric sheet to the exterior packaging material.