Abstract: An electronic switch with force feedback function includes a base, an actuating component and a. The actuating component is movably connected to the base, and includes a. The magnetic field generating module is disposed on the base, and provides a magnetic repulsive force to the magnetic unit for force feedback while the actuating component moves close to the base.

Abstract: Provided are a vibration unit which includes a pair of right and left coils that vibrate in response to vibration of a stylus attached to a cantilever and a magnetic circuit which includes a magnet and a pair of yokes and forms a magnetic path. The coils to be disposed in a gap between the pair of yokes are flat coils having perfect circular shapes, and V-shaped notches are formed on opposing surfaces, with the coils interposed therebetween, of the pair of yokes 4. An intersection angle of the V-shaped notch is set to be an angle to allow channel separation between right and left output signals to be obtained by the pair of coils to be equal to or larger than 20 db.

Abstract: Embodiments are disclosed for driving an electromagnetic transducer via a drive unit comprising stationary coils and a moving magnet. In some embodiments, an electromagnetic transducer comprises a diaphragm configured to generate acoustic vibrations, a moving magnet affixed to the diaphragm, and a pair of fixed coils surrounding the moving magnet, the fixed coils configured to direct electrical current in opposite directions.

Abstract: In a stereo pick-up having movable coils (14) and an SmCo magnet (22) with a high energy content, with the coil system (14, 15, 18) arranged in front of one pole face of said magnet, a yoke plate (23) of a magnetic soft material is arranged in front of said system to increase the magnetic induction in the coils. The great coercive force of the magnet is utilized for simplifying and reducing the costs of the mechanical structure in that the yoke plate is formed with two legs (26) which extend rearwardly, engage and are secured to two opposite sides of the magnet. The short-circuit of the magnet established by these legs has no noticeable impact on the induction in the air gap because of the high coercive force of the magnet.

Abstract: A stereo phonograph pick-up head or cutter has a slim elongated construction utilizing an elongated mount having connector pins at its rear end. Two elongated pole pieces fit into the mount, each having a socket at its rear end. Each coil is wound around a long straight pole rod whose rear end fits into a respective socket and whose front end bounds the transducing gap. A screening shell, part of which forms a common pole piece, slides lengthwise over the holder, and is glued thereto. The stylus unit is slid over the front end of the screening shell, with the stylus magnetic element sliding between the screening shell and pole pieces into the transducing gap.

Abstract: Disclosed in a high-performance electromagnetic pickup cartridge with little distortion, comprising a stylus attached to the end of a cantilevered arm, a disk type armature magnetized in its axial direction and secured to the arm, and bar type magnetic core elements disposed in the vicinity of the armature so that they are at right angles to the axis of the cantilevered arm and correspond to each channel of a stereophonic record. When the armature is vibrated, an output signal is generated in respective coils wound around the core elements. Because of the above-described construction, the core elements need only have a bar-shaped configuration without the necessity for opposing faces between which a magnet or an iron piece would otherwise have to be inserted.

Abstract: A moving magnetic pickup cartridge including: a vibratory system having; a stylus arm in a cantilever fashion, a stylus being provided at a free end of the stylus arm, and a permanent magnet being provided at a fixed end of the stylus arm, the magnet being magnetized in a direction of an axis of the stylus arm; a magnetoelectric converting system including; a stationary core having first, second and third yoke members magnetically coupled at their one pole ends to each other, the first and second yoke members having their other pole ends face respective lateral peripheral sides of the permanent magnet while the third yoke member has its other pole end facing an upper periphery of the magnet; and a coil system which includes at least two sets of coils, each set of which is wound around the first, second and third yoke members, one set of coils producing a sum of a horizontal signal and a vertical signal corresponding respectively to a horizontal component and a vertical component of the magnet vibration, the o

Abstract: A grounding technique for a screening shell of a phonograph cartridge. A connector pin is offset with respect to other pins of the cartridge so as to be in direct contact with one of the walls of the shell.

Abstract: A coil assembly comprises a plurality of conductive spiral pattern layers which are piled up via (an) insulating layer(s) on a wafer. The electrical connection between the spiral patterns is established by means of a conductive member, which is a portion of the upper spiral pattern layer, filled in a through-hole which is made in the insulating layer so that the spiral patterns are connected in series to develop a high voltage when the coil assembly is moved in a magnetic field.

Abstract: An electromagnetic pickup cartridge comprises a movably supported permanent magnet magnetized in the direction of the thickness thereof, a cantilever secured to the magnet with a stylus attached to the free end thereof, and a pair of magnetic flux sensors stationarily mounted above the permanent magnet at right angles to each other for sensing the angular displacement of the permanent magnet about different axes with respect to a neutral position.

Abstract: A magnetic cartridge such as a pick-up or cutter, whose magnetic circuits are at least partly hollow, the cavities extending mainly in the direction of the magnetic flux. Each magnetic circuit and in particular each polepiece is formed at least partly with a slot communicating with the cavity and extending substantially in the same direction. This reduces eddy-current losses in the magnetic circuit, thereby improving the treble reproduction of the pick-up.

Abstract: An electrodynamic pickup cartridge comprises two reproduction channels (1 and 2). Each channel (1 and 2) is provided with a cylindrical coil (3 and 4) representing a single-section structure and so disposed relative to its magnet (5 and 6) that it encompasses both poles (N and S) of said magnet and longitudinal axis thereof is perpendicular to the axis of said magnet (5 and 6) along the N-S line. The magnets (5 and 6) are installed on a stylus holder (7) which is common to both channels (1 and 2) and carries a stylus (8) so that unlike poles (N and S) thereof project on both sides of the stylus holder (7), while their axes (9 and 10) along the N-S line are found in planes crossing at a standard recording angle (.alpha.).

Abstract: A stereo pickup cartridge of a movable magnet type comprising three movable magnets. The magnetic axis of each of the magnets is orthogonal to the cantilever shaft.

Abstract: In a moving coil type stereophonic pickup cartridge, an armature is provided having first, second, and third leg portions which extend in three directions. A source of magnetic flux is disposed with only one pole thereof adjacent to the first, second and third leg portions of the armature. The magnetic circuits thus constructed, having an open return path, generate signals by changes in the magnetic flux through coils wound on the second and third leg portions due to the movement of the armature relative to the magnetic source. Variations in the design of the three leg armature and the magnetic source are disclosed. Practical embodiments of the invention include disclosure of cartridge replacement features providing convenient electrical connection between moving coils and remainder of the sound reproduction system.

Abstract: A moving-coil type stereo pickup cartridge comprises a vibration mechanism, including a stylus for tracing the groove of a sound track on a record disc, at least one coil plate provided in the vibration system and adapted to vibrate in response to vibrations of the stylus, and a structure for forming a magnetic field for the coil plate. The coil plate comprises a thin insulative substrate and a pair of left and right coils substantially symmetric with respect to a center line and formed by an electrically conductive thin film placed in a spirally wound pattern on at least one surface of the substrate. The magnetic field-forming construction comprises a permanent magnet and a pair of yokes adapted to clamp the permanent magnet. The pair of yokes have confronting surfaces for defining a gap in which the coil plate is interposed and a recessed substantially reverse V-shaped notch or cutout. The notch is defined by edge parts or facets.

Abstract: A pickup cartridge comprises a magnetic circuit having an air gap, a coil wound on the magnetic circuit and a cantilever having a permanent magnet inserted in to the air gap. In this case, the magnetic circuit comprises a delta-shaped jointless core having the air gap at its vertical angle, and the coil is inserted through the air gap and fixed to the core.

Abstract: An electromagnetic transducer for converting mechanical or recorded acoustic events into alternating voltages particularly for tracing stereo signals recorded on plate shaped supports comprises a substantially cylindrical permanent magnet which is radially magnetized and disposed around four pole rods each of which has a coil winding therearound and whose axes are arranged substantially at corner points of a square in a plane perpendicular to the axes of the rods. A pickup stylus has a soft iron element which is driven by the stylus and which is disposed adjacent one end of the pole rods. The stylus is mounted for swinging movement about its center point, on the central axis of the transducer system. The soft iron element is directly included in the magnetic circuit at one end of the permanent magnet.

Abstract: A stereophonic electromagnetic pickup cartridge in which each of the right- and left-channel yokes is formed by folding a thin strip of a magnetic material over itself many times like pleats into a U-shape; coils are mounted on the yokes; the bases of the yokes are crossed so that the bases of the yokes are respectively disposed along the lines which are crossed by 90.degree. respectively with the axes of the maximum sensitivity of the right- and left-channels are formed; and an armature is disposed at the open ends of the yokes. Mass production at less costs of high-quality yokes with minimum eddy current loss becomes possible.

Abstract: An improved type of pickup cartridge comprising a stylus assembly, a cartridge body case to receive the stylus assembly therein, and pole pieces provided to support the stylus assembly in the cartridge body case, wherein a resilient member is provided in the cartridge body case to secure the friction fit of the stylus assembly. The resilient member is also grounded such that the noise due to electrostatic discharge is prevented.

Abstract: A moving-coil type pickup cartridge comprises a vibration system including a stylus for tracing a sound groove of a record disc, at least one coil plate adapted to vibrate in response to vibration of the stylus of the vibration system, and an arrangement for producing magnetic fields with respect to the coil plate. The coil plate has at least one coil formed by thin film in a spirally-shaped pattern. The magnetic field producing arrangement has at least one permanent magnet for producing magnetic fields wherein are produced magnetic fluxes of mutually opposite directions respectively in regions of the coil resulting from substantially halving of the coil in the vibration direction thereof.

Abstract: A magnetic phonograph pick-up cartridge having a fixed assembly portion and a replaceable assembly portion wherein the replaceable portion includes self-contained, longitudinally-extending stylus pole pieces surrounding a pivotally mounted stylus magnet. One end portion of the magnet has a stylus-containing shank connected so that movement of the stylus by a phonograph record groove will cause a related pivotal movement of the magnet. The stylus pole pieces, which could include one or two pole piece pairs, are positioned to define a longitudinally extending pole gap. The magnet has a longitudinal dimension less than that of the pole pieces and is positioned within the pole gap. A resilient collar is attached to the stylus pole pieces and is used to pivotally mount the magnet so that movements of the stylus will alter the magnetic flux coupled from the magnet to the stylus pole pieces.

Abstract: At least one spiraled semi-circular shaped coil is printed on each surface of a wafer. The coil on a first surface of the wafer is arranged in such a manner that it is rotated 90 degrees with respect to the coil on a second surface thereof. In one embodiment, two such printed coils are symmetrically provided on each surface of the wafer, and the pattern of the printed coils on the first surface is arranged to be rotated 90 degrees with respect to the pattern of the printed coils on the second surface thereof. The spiraling directions of the coils on the same surface are inverse or opposite each other. The inner terminals of the coils on each surface are connected and an output is taken out from the outer terminals thereof, or vice versa. A printed coil is employed, for example, in a moving coil type pick-up cartridge.