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12 条记录 (耗时 0.016 秒)

    Multiplex magnetic recording and reproducing apparatus of the rotary head type
    2.
    发明公开
    Multiplex magnetic recording and reproducing apparatus of the rotary head type 失效
    Mehrfaches magnetisches Aufzeichnungs- undWiedergabegerätmit rotierendem Kopf。

    公开(公告)号：EP0275041A2

    公开(公告)日：1988-07-20

    申请号：EP88100166.3

    申请日：1988-01-08

    申请人： HITACHI, LTD. ,  HITACHI VIDEO ENGINEERING, INC.

    发明人： Kobayashi, Masaharu ,  Arai, Takao ,  Yumde, Yasufumi ,  Uto, Kazuo ,  Amada, Nobutaka ,  Toeda, Hiroshi ,  Zama, Hideo ,  Masuda, Michio

    IPC分类号： G11B20/10 ,  G11B5/008 ,  G11B20/22 ,  G11B20/06

    CPC分类号： G11B5/0086 ,  G11B5/00878 ,  G11B5/02 ,  G11B20/10527 ,  H04N5/78213 ,  H04N9/7921 ,  H04N9/802

    摘要： In a helical scan type magnetic recording and reproducing apparatus using rotary heads, magnetic heads (22a and 22b) for FM audio signals, magnetic heads (23a and 23b) for PCM audio signals, and magnetic heads (24a and 24b) for a video signal are arranged on a cylinder, respectively. The FM audio magnetic heads (22a and 22b), the PCM audio magnetic heads (23a and 23b), and the video signal magnetic heads (24a and 24b) have mutually differ­ent azimuth angles, respectively. The FM audio signals are first recorded in a deep layer (39) of a magnetic tape (26) by the FM audio heads, the digital modulation signals of the PCM audio signals are then recorded in an inter­mediate layer (40) by the PCM audio heads, and the video signal is finally recorded in a surface layer (41) by the video signal heads. Upon recording, the FM carrier frequency of the audio signals and the digital modulation carrier frequency of the PCM audio signals are set to frequencies lower than the frequency band of the FM luminance signal in the video signal. The Offset Quadrature Differential Phase-Shift Keying (O-QDPSK) modulation is used as a method of digitally modulating the PCM audio signals.

    摘要翻译： 在使用旋转磁头的螺旋扫描型磁记录和再现装置中，用于FM音频信号的磁头（22a和22b），用于PCM音频信号的磁头（23a和23b）以及用于视频信号的磁头（24a和24b） 分别设置在气缸上。 FM音频磁头（22a和22b），PCM音频磁头（23a和23b）和视频信号磁头（24a和24b）分别具有相互不同的方位角。 FM音频信号首先通过FM音频头记录在磁带（26）的深层（39）中，然后通过PCM音频将PCM音频信号的数字调制信号记录在中间层（40）中 头，并且视频信号最终由视频信号头记录在表面层（41）中。 在记录时，音频信号的FM载波频率和PCM音频信号的数字调制载波频率被设置为低于视频信号中的FM亮度信号的频带的频率。 使用偏移正交差分相移键控（O-QDPSK）调制作为对PCM音频信号进行数字调制的方法。

    Magnetic head
    5.
    发明公开
    Magnetic head 失效
    Magnetkopf。

    公开(公告)号：EP0242861A2

    公开(公告)日：1987-10-28

    申请号：EP87105879.8

    申请日：1987-04-22

    申请人： HITACHI, LTD.

    发明人： Abe, Mitsuo ,  Konishi, Katsuo ,  Ohshima,Isao ,  Kawano, Kanji ,  Sasaki, Takumi ,  Zama, Hideo

    IPC分类号： G11B5/31 ,  G11B5/187

    CPC分类号： G11B5/187 ,  G11B5/3176

    摘要： A magnetic head (10) comprising a pair of magnetic cores (12, 12') of magnetic thin films which are sandwiched by a pair of non-magnetic substrates (11, 11'), in which the magnetic cores are limitedly formed in the neighborhood of a winding window (14) provided in at least one of the non-magnetic substrates.

    摘要翻译： 一种磁头（10），包括由一对非磁性基板（11,11分钟）夹持的磁性薄膜的一对磁芯（12,12分钟），其中磁芯被有限地形成在 设置在至少一个非磁性基板上的绕组窗口（14）的附近。

    Magnetic head
    6.
    发明公开
    Magnetic head 失效
    磁头

    公开(公告)号：EP0235395A1

    公开(公告)日：1987-09-09

    申请号：EP86118175.8

    申请日：1986-12-31

    申请人： HITACHI, LTD.

    发明人： Kumasaka, Noriyuki ,  Otomo, Shigekazu ,  Yamashita, Takeo ,  Zama, Hideo ,  Morikawa, Juichi

    IPC分类号： G11B5/235 ,  G11B5/23 ,  G11B5/193

    CPC分类号： G11B5/21 ,  G11B5/187

    摘要： In a magnetic head employing a metallic ferromagnetic material (32) for portions defining a transducing gap, an oxide film (33) or carbide film (33) and a nonmagnetic metal film (34) are provided in this order on each of track width narrowing grooves, and glass (35) is packed on the nonmagnetic metal film, thereby to prevent the deterioriations of magnetic characteristics ascribable to the reaction between the metallic ferromagnetic material and the glass (35) and the production of bubbles ascribable to the reaction between the protective films and the glass, and to achieve the enhancements of recording and reproducing characteristics, the prevention of damages to a recording medium surface, the increase of a head lifetime and the rise of the available percentage of manufacture of the heads. When a glass film is further provided on the nonmagnetic metal film and the glass (35) is packed thereon, more excellent effects are achieved.

    摘要翻译： 在用于限定换能间隙的部分的采用金属铁磁材料（32）的磁头中，氧化膜（33）或碳化物膜（33）和非磁性金属膜（34）依次设置在每个磁道宽度变窄 凹槽和玻璃（35）填充在非磁性金属膜上，由此防止归因于金属铁磁材料和玻璃（35）之间的反应的磁特性的恶化以及由于保护层 薄膜和玻璃，并且实现记录和再现特性的提高，防止对记录介质表面的损害，磁头寿命的增加以及磁头制造的可用百分比的提高。 当在非磁性金属膜上进一步提供玻璃膜并且玻璃（35）被填充在其上时，获得更优异的效果。

    Rotary magnetic head device and rotary transformer used therefor
    8.
    发明公开
    Rotary magnetic head device and rotary transformer used therefor 失效
    Rotierende Magnetkopf-Vorrichtung unddafürverwendeter rotierender Transformer。

    公开(公告)号：EP0393582A2

    公开(公告)日：1990-10-24

    申请号：EP90107254.6

    申请日：1990-04-17

    申请人： HITACHI, LTD.

    发明人： Ohji, Toshio ,  Morikawa, Juichi ,  Zama, Hideo

    IPC分类号： G11B5/53

    CPC分类号： G11B5/53 ,  H01F38/18

    摘要： A pair of throughholes (101a, 101b), through which the starting extremity (107a) and the ending extremity (107b) of each of coil conductors (107) disposed on the rotor core (104) and the stator core constituting the rotary transformer are led to the respective rear surfaces, are linked by a linking slit (120). Or one throughhole (501), through which both the starting extremity (507a) and the ending extremity (507b) of each of the coil conductors (507) are led, is divided into two through­hoes (501a, 501b) by the disposing a non-magnetic partitioning member (510) having a thermal expansion coefficient close to that of the magnetic body within a region of 15%. In this way, the two throughholes (101a, 101b; 501a, 501b) behave, as if the starting extremity (107a) and the ending extremity (107b) of each of coil conductors (107) passed through magnetically one throughhole, so that magnetic field components produced at the starting portion and the ending portion cancel each other and that the coupling coefficient between the rotor core and the stator core is increased.

    摘要翻译： 一对通孔（101a，101b），设置在转子铁心（104）上的每个线圈导体（107）的起始末端（107a）和末端（107b）以及构成旋转变压器的定子铁心的一对通孔 被引导到相应的后表面，通过连接狭缝（120）连接。 或者每个线圈导体（507）的起始末端（507a）和末端（507b）都被引导的一个通孔（501）通过设置非线性元件被分成两个通孔（501a，501b） - 磁性分隔构件（510），其在15％的区域内的热膨胀系数接近于磁体的热膨胀系数。 以这种方式，两个通孔（101a，101b; 501a，501b）的行为就好像每个线圈导体（107）的起始末端（107a）和末端（107b）通过磁性通过一个通孔，使得磁 在起始部分和末端部分产生的场分量相互抵消，并且转子芯和定子铁心之间的耦合系数增加。

    Magnetic head
    9.
    发明公开
    Magnetic head 失效
    磁头

    公开(公告)号：EP0242861A3

    公开(公告)日：1989-10-11

    申请号：EP87105879.8

    申请日：1987-04-22

    申请人： HITACHI, LTD.

    发明人： Abe, Mitsuo ,  Konishi, Katsuo ,  Ohshima,Isao ,  Kawano, Kanji ,  Sasaki, Takumi ,  Zama, Hideo

    IPC分类号： G11B5/31 ,  G11B5/187

    CPC分类号： G11B5/187 ,  G11B5/3176

    摘要： A magnetic head (10) comprising a pair of magnetic cores (12, 12') of magnetic thin films which are sandwiched by a pair of non-magnetic substrates (11, 11'), in which the magnetic cores are limitedly formed in the neighborhood of a winding window (14) provided in at least one of the non-magnetic substrates.

    摘要翻译： 一种磁头（10），包括一对由一对非磁性基片（11,11'）夹持的磁性薄膜的磁芯（12,12'），其中磁芯有限地形成在 设置在至少一个非磁性基板上的绕组窗口（14）附近。