公开(公告)号：US4562503A

公开(公告)日：1985-12-31

申请号：US515550

申请日：1983-07-20

申请人： Yoshiharu Fujioka ,  Akio Onuki ,  Shushi Takei

发明人： Yoshiharu Fujioka ,  Akio Onuki ,  Shushi Takei

IPC分类号： G11B5/33 ,  G11B5/127 ,  G11B5/53 ,  G11B5/30

CPC分类号： G11B5/1278 ,  G11B5/127 ,  G11B5/538

摘要： A main magnetic pole member and an auxiliary magnetic pole member of a perpendicular magnetic recording head are disposed such that they are opposed to each other with a recording medium for recording a signal thereon (i.e., a magnetic tape) interposed therebetween. In the central portion of a holder of the main magnetic pole member, a magnetic pole film is embedded such that its upper end edge is exposed on a sliding contact surface of the holder. The magnetic tape is brought into sliding contact with the magnetic pole film. A pair of electrodes are embedded in such a manner as to sandwich an upper end portion of the magnetic pole film within the holder, and at positions spaced by a suitable distance from such upper end portion of the magnetic pole film. The auxiliary magnetic pole member causes the generation of a uniform magnetic flux directed from the auxiliary magnetic pole member toward the magnetic pole film. The magnetic pole film is formed of a magnetic material which has its permeability varied upon application thereto of an electric field. When a voltage is applied to the electrodes in accordance with the signal, an electric field is formed in the magnetic pole film to increase or decrease the permeability thereof, thereby causing an increase or decrease in density of the magnetic flux in the vicinity of the magnetic pole film. Thus, the magnetization of the magnetic tape is inverted or noninverted with the result that perpendicular magnetic recording of the signal is effected.

摘要翻译： 垂直磁记录头的主磁极部件和辅助磁极部件被设置成使得它们彼此相对，并具有用于在其间记录信号的记录介质（即，磁带）。 在主磁极构件的保持器的中心部分中，嵌入磁极膜，使得其上端边缘暴露在保持器的滑动接触表面上。 磁带与磁极膜滑动接触。 一对电极被嵌入以将磁极膜的上端部夹在保持器内部以及与磁极膜的上端部隔开适当距离的位置。 辅助磁极部件产生从辅助磁极部件引导到磁极膜的均匀磁通量。 磁极膜由磁性材料形成，磁性材料在施加电场时其磁导率变化。 当根据该信号对电极施加电压时，在磁极膜中形成电场以增加或减少其磁导率，从而使得在磁性附近的磁通密度增加或减少 极片 因此，磁带的磁化反转或不反相，结果是信号的垂直磁记录被实现。

公开(公告)号：US4531170A

公开(公告)日：1985-07-23

申请号：US377843

申请日：1982-05-13

申请人： Shushi Takei ,  Akio Onuki

发明人： Shushi Takei ,  Akio Onuki

IPC分类号： G11B5/255 ,  G11B5/187 ,  G11B5/265 ,  G11B5/12

CPC分类号： G11B5/2651 ,  G11B5/1871 ,  G11B5/265

摘要： A combination magnetic head is formed with first and second gaps on a head face to be slidably contacted with a tape. The head face has first, second and third surface sections, the first and second surface sections are respectively formed on the first and second cores, and the third section is formed on a spacer for integrally coupling the first and second cores. The first and third surface sections decreases in the width toward the second surface section, the second surface section varies in the width, and the second surface section becomes at the minimum in the width in the vicinity of the gap of the second surface section.

摘要翻译： 组合磁头形成在头表面上的第一和第二间隙以与带可滑动接触。 头表面具有第一，第二和第三表面部分，第一和第二表面部分分别形成在第一和第二芯上，第三部分形成在用于一体地联接第一和第二芯的间隔件上。 第一和第三表面部分朝向第二表面部分的宽度减小，第二表面部分的宽度变化，并且第二表面部分在第二表面部分的间隙附近的宽度上变得最小。

公开(公告)号：US4423550A

公开(公告)日：1984-01-03

申请号：US256050

申请日：1981-04-21

申请人： Yoshiharu Fujioka ,  Shushi Takei

发明人： Yoshiharu Fujioka ,  Shushi Takei

IPC分类号： G11B5/17 ,  G11B5/187 ,  G11B5/265 ,  G11B5/42

CPC分类号： G11B5/1871 ,  G11B5/265 ,  Y10T29/49048 ,  Y10T29/49057

摘要： A composite head structure having a front core consisting of a non-magnetic spacing device for separating a read-write magnetic flux path from an erase magnetic flu path and first and second core chips adhered together with the spacing device interposed between them. A read/write gap is formed at the central portion of the first core chip which is parallel to the longitudinal direction of the spacing device and whose width is defined by first and second notches which extend from respective side edges of the first core chip. Erase gaps are formed in the second core chip which extend between the side edges of the second core chip parallel to the longitudinal direction of the spacing device and whose widths are defined by a third notch formed at a position substantially corresponding to the read/write gap as viewed along the direction of the arrangement of the first and second core chips. A back core is adhered to the front core and forms the read/write magnetic flux path and the erase magnetic flux path with the back core having a read/write magnetic leg forming the read/write magnetic flux path and an erase leg forming the erase magnetic flux path as well as a common leg forming both the magnetic flux paths. A fourth notch separates the magnetic flux paths formed at a position corresponding to the spacing device. a read/write winding is wound on the read/write leg and an erase winding is wound on the erase leg.

摘要翻译： 一种复合头结构，其具有由用于将读写磁通路与擦除磁流感路径分开的非磁间隔装置构成的前磁芯和与间隔装置插入其间的粘合在一起的第一和第二芯芯片。 在第一芯片的中心部分处形成读/写间隙，其平行于间隔器件的纵向方向，并且其宽度由从第一芯片的相应侧边缘延伸的第一和第二凹口限定。 擦除间隙形成在第二芯片中，第二芯片在第二芯片的侧边缘之间平行于间隔器件的纵向方向延伸，并且其宽度由形成在大致对应于读/写间隙的位置处的第三凹口限定 沿着第一和第二芯片的布置方向观察。 背芯粘附到前芯，并形成读/写磁通路径和擦除磁通路径，其中后芯具有形成读/写磁通路的读/写磁腿和形成擦除的擦除腿 磁通路径以及形成两个磁通路径的公共支路。 第四切口分离形成在对应于间隔装置的位置处的磁通路径。 读/写绕组缠绕在读/写脚上，并且擦除绕组缠绕在擦除脚上。