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公开(公告)号：JPS6057514A
公开(公告)日：1985-04-03
申请号：JP16557183
申请日：1983-09-08
Applicant: SONY CORP
Inventor： HAYAKAWA ATSUNORI
Abstract: PURPOSE:To record data magnetically with a high density by providing notches near a main magnetic pole on the face, which a magnetic recording medium is slid on, of a slider. CONSTITUTION:Nonmagnetic guard blocks 34 and 35 are provided where notched grooves 34a and 35a are provided in a winding part so that a winding is wound around the tip of a main magnetic pole. The slider which forms a sliding face S is formed with prescribed planes of nonmagnetic guard members 12, 12b, and 12c and nonmagnetic guard blocks 34 and 35, and magnetic head element parts are formed with respect to a recording and reproducing main magnetic pole 10 and tunnel erasing main magnetic poles 18a and 18b. The width and the depth of grooves 34a and 35a are made equal to the size of holes 15 and 20 for the winding. Thus, the winding wire can be wound the tip similarly to a head which has not guard blocks 34 and 35. The tip of the main magnetic pole can be seen directly and its length is controlled accurately at a sliding face polishing time because there are not guard blocks 34 and 35 on sides near the main magnetic pole, and a high sensitivity is attained because the length of the tip of the main magnetic pole can be made short.
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公开(公告)号：JPS59198517A
公开(公告)日：1984-11-10
申请号：JP7332583
申请日：1983-04-26
Applicant: Sony Corp
Inventor： HAYAKAWA ATSUNORI
CPC classification number: G11B5/1278
Abstract: PURPOSE:To attain recording and reproduction in excellent way by providing a nonmagnetic guard member clipping a couple of main magnetic poles for erasure from both sides at a magnetic recording medium opposing face and a thin film coil formed so as to allow the main magnetic poles for erasure to pass through the inside so as to reduce the gap between the main magnetic pole for recording/reproduction and the main magnetic pole for tunnel erasure. CONSTITUTION:The thin film coil 12 made of a conductor layer such as Cu or Al is wound by, e.g., several turns around the main magnetic poles 9a, 9b for tunnel erasure. The main magnetic poles 9a, 9b for tunnel erasure are connected magnetically to a magnetic core 4c at a side of the main magnetic poles 9a, 9b for tunnel erasure in opposite contact with the magnetic recording medium and at an end part of the opposite side. Terminals of the thin film coil are led out from notches 22, 23 and a current is applied to the thin film coil 21 of the single magnetic pole type composite magnetic head for vertical recording at magnetic recording so as to attain desired tunnel erasure. A slot 24 is formed to a shape opened toward the recording and reproduction side so as to apply a winding 8 for recording/reproduction when the tunnel erasure side and the recording/reproduction side are incorporated.
Abstract translation: 目的：通过提供一种非磁性保护构件来实现记录和再现，通过提供一个非磁性保护构件，其在磁记录介质相对面和两个薄膜线圈的两侧夹着两个用于擦除的主磁极，以便允许主磁极 擦除通过内部以减少用于记录/再现的主磁极与用于隧道擦除的主磁极之间的间隙。 构成：由诸如Cu或Al的导体层制成的薄膜线圈12围绕主磁极9a，9b围绕以进行隧道擦除。 用于隧道擦除的主磁极9a，9b以磁性方式连接到主磁极9a，9b侧的磁芯4c，用于与磁记录介质相反接触的隧道擦除和相对侧的端部。 薄膜线圈的端子从凹口22,23引出，并且将电流施加到用于磁记录的垂直记录的单个磁极型复合磁头的薄膜线圈21，以达到期望的隧道擦除。 槽24形成为朝向记录和再现侧打开的形状，以便在包含隧道擦除侧和记录/再现侧时施加用于记录/再现的绕组8。
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公开(公告)号：JPS5994216A
公开(公告)日：1984-05-30
申请号：JP20433582
申请日：1982-11-19
Applicant: SONY CORP
Inventor： HAYAKAWA ATSUNORI , SAITOU ICHIROU
Abstract: PURPOSE:To obtain a magnetic reproducer which has a small data point shift degree and high S/N by detecting the middle point level of the envelope of a reproduced signal and then comparing the level of the reproduced signal with said middle point level to obtain a reproduced signal. CONSTITUTION:The figure A shows a reproduced waveform sent from an annular magnetic head 1, and this reproduced signal is compared wth a middle point level Ec through a comparator 3. The part higher than the level Ec is set at the positive fixed value; while the part lower than the level Ec is set at the negative fixed value respectively. Thus a comparison output, i.e. a reproduced digital signal is obtained as shown by the figure B. A middle point level detecting circuit 10 supplies the reproduced signals to sample holding circuits 34 and 35 and a differentiation circuit 36. The differential output is compared with the earth voltage at a comparator 37, and this comparison output is supplied to a sampling pulse (clock) generating circuit 38. Then the sampling pulse which samples the positive and negative peaks is supplied to the circuit 34 and 35 respectively. The outputs of circuits 34 and 35 are added together through LPFs 18 and 19, and the middle point level detecting voltage is obtained.
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公开(公告)号：JPS57162114A
公开(公告)日：1982-10-05
申请号：JP4674681
申请日：1981-03-30
Applicant: SONY CORP
Inventor： NORIHASHI SHIGEO , HAYAKAWA ATSUNORI , SATAKE KIYOSHI
Abstract: PURPOSE:To improve recording efficiency although a coil is arranged behind a sliding surface for a magnetic medium, by adequately selecting the wind diameter, arrangement position, etc., of an auxiliary coil. CONSTITUTION:A main magnetic pole 2 is made of a magnetic thin film having 0.5-3mum thickness (t), and on both or either of the surfaces of it, an auxiliary core 10 having high magnetic permeability is coupled magnetically closely. This auxiliary core 10 is arranged so that its tip is at a distance l from the tip of the main magnetic pole 2 extending to the sliding surface for a magnetic medium. Then, the coil is positioned in front of the auxiliary core 10 as much as pssible so that its tip surface is aligned to the tip of the auxiliary core 10. When the distance from one surface of the main magnetic pole 2 to the internal surface of the coil 4 opposed to it is (a) and the wind thickness of the coil 4 is (b), l is 10-200mum, or practical use range, and (a+b/2)/l is 0.55-2.4.
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公开(公告)号：JPS57147117A
公开(公告)日：1982-09-10
申请号：JP3231081
申请日：1981-03-06
Applicant: SONY CORP
Inventor： HAYAKAWA ATSUNORI , SATAKE KIYOSHI , SEKI CHIYUUJI
Abstract: PURPOSE:To increase the recording efficiency and to eliminate many failures, by locating a flat coil on a substrate in a head of a vertical recording system, locating a main magnetic pole at the center, and taking the inner diameter of the coil smaller than the width of the main magnetic pole. CONSTITUTION:A coil 13 is located on a substrate 11, and a main magnetic pole 14 is located almost vertically at the center of the coil. The inner diameter of lengthwise direction of the main magnetic pole 14 is selected smaller than the width W of the main magnetic pole. The substrate 11 is made of a magnetic substance, and a pedestal 12 having an external shape corresponding to the inner shape of the coil is formed monolithically with the substrate 11. On the pedestal 12, one end of the main magnetic pole 14 is bonded. Since the coil 13 of the magnetic head is almost orthogonal to the main magnetic pole 14 and the width of windings is greater and flat, a parallel magnetic field can be formed and magnetization is made to the tip of the main magnetic pole to increase the recording efficiency. Since this coil is taken as a small inner diameter so that it can enter the lower part of the main magnetic pole 14, the inductance of the coil can be decreased, allowing high frequency drive.
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Patent Agency Ranking
公开(公告)号：JPS57143710A
公开(公告)日：1982-09-06
申请号：JP2779581
申请日：1981-02-27
Applicant: SONY CORP
Inventor： HAYAKAWA ATSUNORI
Abstract: PURPOSE:To widen an opposing area of a main magnetic pole to a pedestal, to reduce magnetic reluctance in this area, and to raise the reproducing sensitivity, by providing an auxiliary core on the base part side of the main magnetic pole. CONSTITUTION:An auxiliary core 16 consisting of a magnetic material having high magnetic permeability (example: Ni-Zn ferrite, etc.) is provided on a magnetic connecting part with a magnetic material block (example: that which consists of Ni-Zn ferrite, etc.) 11 of a main magnetic pole (example: that which consists of a magnetic thin film of permalloy, etc.) 14, that is to say, the end part for installing it to a pedestal 12. This auxiliary core is constituted so that it is not extended up to the end part of the opposite side of the connecting end part to the pedestal 12 of the main magnetic pole 14, and the end part of the opposite side of the magnetic connecting part to the magnetic block body 11 of the main magnetic pole 14, that is to say, the end of the tip part is faced to the slide surface to the magnetic medium. In this way, it is possible to widen a substantial opposed area to the pedestal of the main magnetic pole 14, to reduce magnetic reluctance in this area, and to raise the reproducing sensitivity.
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公开(公告)号：JPS53121608A
公开(公告)日：1978-10-24
申请号：JP3631577
申请日：1977-03-31
Applicant: SONY CORP
Inventor： HAYAKAWA ATSUNORI , NORIHASHI SHIGEO , SATAKE KIYOSHI , SHIMAMURA TOSHIKI
Abstract: PURPOSE:To perform high-frequency and high-density recording by using a main pole, an auxiliary pole and a high-permeability body.
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公开(公告)号：JPH0344366B2
公开(公告)日：1991-07-05
申请号：JP15032382
申请日：1982-08-30
Applicant: SONY CORP
Inventor： SHIMAMURA TOSHIKI , HAYAKAWA ATSUNORI
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公开(公告)号：JPH0343768B2
公开(公告)日：1991-07-03
申请号：JP9530284
申请日：1984-05-12
Applicant: SONY CORP
Inventor： TAKINO HIROSHI , HAYAKAWA ATSUNORI , KAWABATA KAZUKO
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公开(公告)号：JPS6434671A
公开(公告)日：1989-02-06
申请号：JP19163287
申请日：1987-07-31
Applicant: SONY CORP
Inventor： MISHIMA AKIO , HAYAKAWA ATSUNORI
Abstract: PURPOSE:To stably and continuously inject a polishing powder toward an object to be polished by moving a position of an air inlet for feeding air into a mixing chamber. CONSTITUTION:A rotary disc 40 is rotated by a motor 41 to rotationally displace a position of a filter 42 formed at a part of the rotary disc 40, thereby continuously moving an air inlet of a compressed air to be fed through the filter 42 into a polishing powder tank 15 in a mixing chamber 2. During the rotation of the rotary disc 40, a polishing powder 12 tends to generally rotate with the rotary disc 40, but the rotation of the powder 12 is hindered by a projection 43. As a result, the polishing powder 12 staying in the tank 15 is widely stirred by the compressed air fed from the moving air inlet, and is dispersed uniformly and sufficiently. Accordingly, even in the case of using a fine powder as the polishing powder, a polishing powder outlet 20 of the tank 15 is not plugged by the polishing powder 12, but the powder 12 is injected stably and continuously toward an object A to be polished in a blast chamber 3, thereby well polishing the object A.
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