Abstract: A head drum assembly for a tape recorder maintains a substantially constant preload and reduces manufacturing costs. The head drum assembly includes a shaft fixed to a center of a stationary drum, a rotary drum installed to an upper portion of the stationary drum to be rotated by the shaft and having a rotor, a stator installed to an upper portion of the rotary drum to face the rotor, a bearing interposed between the shaft and the rotary drum that rotatably supports the rotary drum, a spring resiliently supporting an inner race of the bearing, and a drum cover fixed with the stator and fixed to the shaft to apply a substantially constant pressure to the bearing and to substantially constantly maintain a spacing between the stator and the rotor.

Abstract: A head drum assembly of a tape recorder in which an inner race and an outer race of an upper bearing are press-fitted onto a shaft and a rotary drum, respectively, thereby applying a preload. A resilient body, such as a compressed coil spring, is disposed between a lower bearing disposed between the rotary drum and the shaft and a stationary drum. The resilient body upwardly presses the inner race of the lower bearing, thereby applying a preload. Accordingly, the head drum assembly of the tape recorder provides enhanced assembling efficiency and reduced manufacturing costs.

Abstract: To provide a magnetic head, a recording/reproducing method for a tape magnetic recording medium and a rotary magnetic head mechanism. A flat head FH1 is mounted on a rotary drum DR1 capable of allowing a magnetic tape MT to run thereon, and a smooth flat surface PL1 that faces the magnetic tape MT and produces hydrodynamic interference with the magnetic tape MT is provided on a flat head FH1, and a head element HE1 that contacts the magnetic tape MT and produces magnetic interference is provided in the area where the magnetic tape MT contacts the smooth flat surface PL1.

Abstract: In a head drum assembly mounting structure on a deck of a tape recorder, a plurality of connecting holes and positioning holes are formed in a drum boss provided at a lower portion of a fixing drum, and a plurality of coupling holes and positioning pins are formed in a drum base which is slant disposed on a main base. By using the positioning holes and the positioning pins as positioning means which are connected to each other in complementary fashion, the coupling holes of the drum base and the connecting holes of the drum boss are aligned with each other, and by fastening a screw into such aligned coupling holes and the connecting holes, the head drum assembly can be directly coupled to the main base while being slant disposed with respect to the main base. Accordingly, any possible damage to a lead line is prevented, and assembly efficiency is improved, while the number of parts and the manufacturing cost are reduced.

Abstract: A tilt stand having a mounting surface and holes for mounting a drum are formed by one normal-feed press working. The holes for mounting the drum are formed by vertical punching. The respective holes are rectangular holes, each of which has one side equal to the diameter of a shaft or the diameter of a screw in the direction of Y. The hole into which the shaft is inserted has the other side in the direction of X which is determined such that the side is in contact with the shaft inserted into the hole in the direction perpendicular to the mounting surface at the obverse surface and the reverse surface of the mounting surface. The drum has a structure in which the shaft projects from the bottom and is positioned with respect to the mounting surface by inserting the shaft into the mounting hole. Three screw holes are formed near the shaft of the drum. The mounting angle of the drum with respect to the mounting surface is determined by the use of the mounting holes corresponding to these screw holes.

Abstract: According to a first aspect the present invention is related to a head drum arrangement allowing a much easier mounting of the rotary transformer. The head drum arrangement comprises a non-rotating lower drum and a rotating upper drum, which are connected by a shaft fixed in the lower drum. The upper drum is mounted on the shaft by a bearing and preferably by two ball bearings. A rotary transformer is arranged between the lower drum and the upper drum having a fixed stator and a rotor rotating jointly with the upper drum. The rotor is non-positively held in its position by the magnetic force of a permanent magnet accommodated in the upper drum.

Abstract: A tilt stand having a mounting surface and holes for mounting a drum are formed by one normal-feed press working. The holes for mounting the drum are formed by vertical punching. The respective holes are rectangular holes, each of which has one side equal to the diameter of a shaft or the diameter of a screw in the direction of Y. The hole into which the shaft is inserted has the other side in the direction of X which is determined such that the side is in contact with the shaft inserted into the hole in the direction perpendicular to the mounting surface at the obverse surface and the reverse surface of the mounting surface. The drum has a structure in which the shaft projects from the bottom and is positioned with respect to the mounting surface by inserting the shaft into the mounting hole. Three screw holes are formed near the shaft of the drum. The mounting angle of the drum with respect to the mounting surface is determined by the use of the mounting holes corresponding to these screw holes.

Abstract: A magnetic recording and reproduction apparatus for recording and reproducing a signal to and from a magnetic tape includes a substrate having first and second positioning engagement holes; a rotation head cylinder provided on the substrate and having the magnetic tape wound therearound over a prescribed angle and having first and second female screws; a first attaching screw having a first cylindrical section for insertion into the first positioning engagement hole and engagement with the first female screw; and a second attaching screw having a second cylindrical section for insertion into the second positioning engagement hole and engagement with the second female screw. Diameters A1 and A2 of the first and second cylindrical sections and diameters B1 and B2 of the first and second positioning engagement holes fulfill the following relationships: 0.0002 mm<B1-A1<0.1 mm, and 0.0002 mm<B2-A2<0.1 mm.

Abstract: A tilt stand having a mounting surface and holes for mounting a drum are formed by one normal-feed press working. The holes for mounting the drum are formed by vertical punching. The respective holes are rectangular holes, each of which has one side equal to the diameter of a shaft or the diameter of a screw in the direction of Y. The hole into which the shaft is inserted has the other side in the direction of X which is determined such that the side is in contact with the shaft inserted into the hole in the direction perpendicular to the mounting surface at the obverse surface and the reverse surface of the mounting surface. The drum has a structure in which the shaft projects from the bottom and is positioned with respect to the mounting surface by inserting the shaft into the mounting hole. Three screw holes are formed near the shaft of the drum. The mounting angle of the drum with respect to the mounting surface is determined by the use of the mounting holes corresponding to these screw holes.

Abstract: A magnetic recording and reproduction apparatus for recording and reproducing a signal to and from a magnetic tape includes a substrate having first and second positioning engagement holes; a rotation head cylinder provided on the substrate and having the magnetic tape wound therearound over a prescribed angle and having first and second female screws; a first attaching screw having a first cylindrical section for insertion into the first positioning engagement hole and engagement with the first female screw; and a second attaching screw having a second cylindrical section for insertion into the second positioning engagement hole and engagement with the second female screw.

Abstract: A tilt stand having a mounting surface and holes for mounting a drum are formed by one normal-feed press working. The holes for mounting the drum are formed by vertical punching. The respective holes are rectangular holes, each of which has one side equal to the diameter of a shaft or the diameter of a screw in the direction of Y. The hole into which the shaft is inserted has the other side in the direction of X which is determined such that the side is in contact with the shaft inserted into the hole in the direction perpendicular to the mounting surface at the obverse surface and the reverse surface of the mounting surface. The drum has a structure in which the shaft projects from the bottom and is positioned with respect to the mounting surface by inserting the shaft into the mounting hole. Three screw holes are formed near the shaft of the drum. The mounting angle of the drum with respect to the mounting surface is determined by the use of the mounting holes corresponding to these screw holes.

Abstract: A magnetic recording and reproducing apparatus which allows a reduction in the necessary space by attaching a rotary head cylinder unit (5) onto a chassis 6 through leaf springs (23) using set screws (22). The rotary head cylinder unit (5) can be fixed onto the chassis (6) with a certain load without causing distortion of the rotary head cylinder unit. Integration of two or more leaf springs (131) improves efficiency in assembling the apparatus and reduces the number of components.