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1. 发明专利

JP2012096435A Sintered body 有权
标题翻译：烧结体
公开(公告)号：JP2012096435A
公开(公告)日：2012-05-24
申请号：JP2010245272
申请日：2010-11-01
申请人： Tdk Corp , Tdk株式会社
发明人： NAGAO TAKEFUMI , ONIZUKA MASAHIRO , KOMATSU HIDEKI , SATO SADAKI , TAKAHASHI KENSUKE
IPC分类号： B28B3/02 , C04B35/26 , H01F1/22 , H01F1/34
摘要： PROBLEM TO BE SOLVED: To provide a sintered body which can efficiently prevent breakage and cracks during a manufacturing process and after a product is shipped.SOLUTION: The sintered body 2 has a three-dimensional shape which includes at least two faces intersecting at an edge part E, and is characterized by a structure that at least on one face, when opposite edge parts E are connected with a straight line, Vickers hardness is decreased from a midpoint C of the edge parts E on a straight line part Li to the edge parts E.
摘要翻译：要解决的问题：提供一种可以有效地防止制造过程中和产品运输后的破裂和裂纹的烧结体。解决方案：烧结体2具有三维形状，其包括至少两个在边缘部分E相交的面，其特征在于，当相对的边缘部分E与直线，维氏硬度从直线部分Li上的边缘部分E的中点C减少到边缘部分E.版权所有（C）2012年，JPO和INPIT

2. 发明专利

JP2010179427A Centerless grinding device 审中-公开
标题翻译：无心研磨装置
公开(公告)号：JP2010179427A
公开(公告)日：2010-08-19
申请号：JP2009026225
申请日：2009-02-06
申请人： Tdk Corp , Tdk株式会社
发明人： ABE YOICHI , KAWAGOE MASABUMI , ONIZUKA MASAHIRO , SAWAI ATSUSHI , KOMATSU HIDEKI
IPC分类号： B24B5/307 , B24B5/22 , B24B5/313
摘要： PROBLEM TO BE SOLVED: To provide a centerless grinding device, capable of suppressing chipping in grinding of a small ferrite material.
SOLUTION: The centerless grinding device 1 includes: an adjustment wheel 3 which rotates a grinding object 9; a grinding wheel 5 which is rotatably supported and grinds the grinding object; and a carrier 7 which is disposed between the adjustment means and the grinding wheel to support each of grinding objects so as to be rotatable, and guides and advances a plurality of grinding objects in a revolution circular route. The adjustment wheel and the grinding wheel respectively includes an adjustment circular part 3a and a grinding circular part 5a, the adjustment circular part and the grinding circular part being disposed so that the circular protruded side faces the circular recessed side. The revolution circular route is disposed to pass through between the circular protruded side and the circular recessed side.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种无心磨削装置，能够抑制小铁素体材料的磨削碎屑。解决方案：无心磨削装置1包括：使磨削对象9旋转的调节轮3; 磨轮5，其被可旋转地支撑并研磨研磨物体; 以及载体7，其布置在调节装置和砂轮之间，以支撑每个研磨物体以便可旋转，并且引导和前进多个研磨物体在旋转圆形路径中。调节轮和砂轮分别包括调节圆形部分3a和研磨圆形部分5a，调节圆形部分和研磨圆形部分被设置成圆形突出侧面向圆形凹入侧。旋转圆形路线设置成在圆形突出侧和圆形凹入侧之间通过。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JPH0980798A PRODUCTION OF MAGNETIC TONER 失效
公开(公告)号：JPH0980798A
公开(公告)日：1997-03-28
申请号：JP23249295
申请日：1995-09-11
申请人： TDK CORP
发明人： NIHEI YOSHITO , ONIZUKA MASAHIRO
IPC分类号： G03G9/083 , G03G9/087
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a magnetic toner by which magnetic magnetite powder and a magnetic toner can be more easily produced using starting material different from conventional starting material and satisfactory characteristics are ensured for the resultant magnetic toner. SOLUTION: A mixture of ferrous chloride with hematite is used as starting material and heat-treated in a steam-contg. atmosphere to produce magnetic magnetite powder by a thermal decomposition reaction and a solid phase reaction allowed to take place at the same time. A bonding resin and additives such as an electric charge controlling agent and a pigment are added to the magnetite powder by 45-70wt.% and they are melted, kneaded, pulverized and classified to produce a magnetic toner. The objective magnetic toner having satisfactory characteristics is obtd. by optimizing various conditions.

4. 发明专利

JPH1187127A CORE FOR INDUCTANCE ELEMENT AND ITS MANUFACTURE 失效
公开(公告)号：JPH1187127A
公开(公告)日：1999-03-30
申请号：JP26099397
申请日：1997-09-09
申请人： TDK CORP
发明人： ONIZUKA MASAHIRO , ITO KO , KAKINUMA OSAMU
IPC分类号： C04B38/06 , H01F1/36 , H01F3/08 , H01F17/04 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To reduce the dielectric constant of a core for a coil as a whole by using a nonmagnetic material in which small pores are distributed. SOLUTION: In an inductance element which is composed of a sintered body of nonmagnetic materials, small pores having diameters of 10-250 μm are distributed and the density ratio and dielectric constant of the sintered body are respectively adjusted to 45-95% and 2-18. The core is manufactured in such a way that combustible particles used for forming the small pores and a binder for molding are added to ferric oxide powder, alumina powder, etc., which become the raw materials of the nonmagnetic materials and, after the powder and particles are kneaded and granulated, the granulated products are molded to a prescribed shape and baked in the air. The baking temperature is set at the normal baking temperature of the nonmagnetic materials in such a way that, when the ferric oxide is composed of hematite, the baking temperature is adjusted to >=1,100 deg.C. The particle size of the nonmagnetic particles which become the raw materials of the nonmagnetic materials are adjusted so that the specific surface areas of the particles may become 1.5-10 mm /g. In addition, the sizes of the combustible particles of PVA, PEG, PP, carbon, etc., are adjusted to 10-250 μm.

5. 发明专利

JPH1140408A CORE FOR INDUCTANCE ELEMENT AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH1140408A
公开(公告)日：1999-02-12
申请号：JP19452297
申请日：1997-07-18
申请人： TDK CORP
发明人： ONIZUKA MASAHIRO , ITO KO , KAKINUMA OSAMU
IPC分类号： H01F1/34 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To reduce the stray capacitance enough to use in high frequency application by setting the apparent density of a sintered block for specified value or less. SOLUTION: The core for an inductance element is an α-ferric oxide sintered block having an apparent density of about 4.9 g/cm or less, has a dielectric const. of about 20 or less and is made by adding a binder to an α-ferric oxide powder, the raw material, granulating, forming into specified shape, and baked in air at a temp. of about 1100 deg.C or less. The ferric oxide powder has a mean grain size of about 0.2 μm or more and specific surface area of about 10 m /g or less. The formed compact density is set to about 2.0-3.8 g/cm by adjusting the forming pressure and pressure holding time. This lowers the dielectric const. of the core and reduces the stray capacitance of the inductance element, thereby making it suited for the high-frequency application.

6. 发明专利

JPH118112A BALUN TRANSFORMER, CORE AND CORE MATERIAL FOR THE SAME 失效
公开(公告)号：JPH118112A
公开(公告)日：1999-01-12
申请号：JP17632397
申请日：1997-06-17
申请人： TDK CORP
发明人： ONIZUKA MASAHIRO , SATO TAKATERU
IPC分类号： C04B35/26 , H01F1/34 , H01F19/06 , H01F27/255
摘要： PROBLEM TO BE SOLVED: To manufacture a balun transformer having high characteristics serviceable in high-frequency band exceeding 300 MHz, by containing Z type hexagonal system ferrite as a core material for the balun transformer. SOLUTION: PbO, SiO as the infinitesimal additives are added to Fe2 O3 , BaCO3 , SrCO3 Co3 O4 as the component of Z type hexagonal ferrite to be wet- blended using a ball mill. Next, the mixture is pre-baked in aerial atmosphere to be wet-crashed to produce a core material for transformer. Next, a paste is prepared using the produced core material for balun transformer so as to form an E shaped core 32 for balun transformer made of a toroidal shaped three block bodies of 33a, 33b, 33a connected by two block bodies 34 using the paste. Accordingly, the core for balun transformer having high initial magnetic permeability and specific resistance makes possible to manufacture the balun transformer having high characteristics serviceable in high frequency band exceeding 300 MHz.

7. 发明专利

JPH10282908A DISPLAY PANEL 失效
公开(公告)号：JPH10282908A
公开(公告)日：1998-10-23
申请号：JP8248297
申请日：1997-04-01
申请人： TDK CORP
发明人： NIHEI YOSHITO , ONIZUKA MASAHIRO
IPC分类号： G09F9/37
摘要： PROBLEM TO BE SOLVED: To provide the display panel which makes multicolored display on the entire multi-cell structure at the same time, displays a desired display body on a magnetic panel, and erases the displayed body by adjusting a fine magnet surface opposing the magnetic pole of a magnet for erasure to the same polarity color surface by cell structures as the magnet for erasure provided at a proper place moves. SOLUTION: The display panel equipped with at least a magnetic panel and a display magnetic pen has fine hexagonal color-coded magnets 2 by cell structures 1 with different magnetic poles arranged on the magnetic panel equipment with the multi-cell structure, and the coloration of the individual cell structures 1 is controlled by correspondence rotation according to magnetic pole variable of the display magnetic pen to make a multicolored display on the entire multi-cell structure at the same time and display a desired display body on the magnetic panel. Further, as a magnet for erasure provided at a proper place moves, the fine magnet surface opposing the magnetic pole of the magnet for erasure is adjusted to the same polarity color surface by the cell structures 1 to securely erase the above-mentioned display body.

8. 发明专利

JPH0971423A PRODUCTION OF MAGNETITE MAGNETIC POWDER 失效
公开(公告)号：JPH0971423A
公开(公告)日：1997-03-18
申请号：JP23048495
申请日：1995-09-07
申请人： TDK CORP
发明人： NIHEI YOSHITO , ONIZUKA MASAHIRO
IPC分类号： G03G9/083 , C01G49/08 , H01F1/11 , H01F1/34
摘要： PROBLEM TO BE SOLVED: To obtain the objective magnetite having excellent magnetic properties by using a mixture of ferrous oxide and hematite as a starting raw material and subjecting the raw material to solid-phase reaction simultaneously with thermal decornposition reaction in a steam-containing atmosphere. SOLUTION: A powdery mixture is prepared by mixing 99-30mol% of liquid ferrous chloride with 1-70mol% of hematite to obtain a slurry and spray-drying the slurry with a spray drier. The powdery mixture is supplied by using a non-oxidizing gas such as N2 as the carrier gas to a rotary kiln containing steam introduced into the kiln and baked at 430-900 deg.C to effect the solid-phase reaction simultaneously with thermal decomposition reaction and obtain the objective magnetite magnetic powder having a magnetite phase content of >=90wt.%, a residual chlorine content of /g and a saturation magnetization of about 82-92emu/g.

9. 发明专利

JP2014058007A Inductance core manufacturing method and inductance core 有权
标题翻译：电感核心制造方法和电感核心
公开(公告)号：JP2014058007A
公开(公告)日：2014-04-03
申请号：JP2012203349
申请日：2012-09-14
申请人： Tdk Corp , Tdk株式会社
发明人： KOMATSU HIDEKI , ONIZUKA MASAHIRO , SOMA MANABU , ABE YOICHI , SHIBUYA YOSHITAKA , NAGAO TAKEFUMI
IPC分类号： B24B19/02 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide an inductance core manufacturing method or the like that enables a core portion to be shaped differently from a flange portion and enables the core portion to be accurately formed.SOLUTION: The inductance core manufacturing method performs the steps of: preparing a workpiece 10 that has a columnar substrate 12 and a rotation reference portion 20 which is molded integrally with the substrate and connected to one end of the substrate and comprises a reference outer peripheral surface 22, at least one part of which is positioned nearer an outer diameter than the side peripheral surface 18 of the substrate; and grinding a part of the substrate while rotating the workpiece along the reference outer peripheral surface of the rotation reference portion.
摘要翻译：要解决的问题：提供一种电感芯制造方法等，其使得芯部能够与凸缘部分不同地成形，并且能够使芯部精确地形成。解决方案：电感芯制造方法执行以下步骤：准备具有柱状基板12和旋转基准部分20的工件10，该基准部分20与基板一体模制并连接到基板的一端并且包括参考外圆周表面22，其基准外圆周表面22的至少一部分位于外径比基板的侧周面18高; 在沿着旋转基准部的基准外周面旋转工件的同时研磨基板的一部分。

10. 发明专利

JP2000173828A SPLIT FERRITE CORE TO ELIMINATE NOISE FOR FLAT CABLE, NOISE ELIMINATING COMPONENT, WIRE HARNESS AND ELECTRONIC EQUIPMENT 失效
公开(公告)号：JP2000173828A
公开(公告)日：2000-06-23
申请号：JP36196898
申请日：1998-12-07
申请人： TDK CORP
发明人： ONIZUKA MASAHIRO
IPC分类号： H01F17/06 , H01F27/02 , H01F27/26 , H05K9/00
摘要： PROBLEM TO BE SOLVED: To facilitate mounting of a split ferrite core to a flat cable, separation of the ferrite core from the flat cable and moreover, a fixing of the ferrite core on the flat cable and also enable to fit to the flat cables of various sizes and to make it possible to effectively remove noise. SOLUTION: The end surfaces of the leg part of the L-type split ferrite core body 20a on one side of L-type split ferrite core bodies 20a and 20b are made to contact the end surfaces of the leg part of the other L-type split ferrite core body 20b in such a way as to encircle a flat cable FC to form a closed magnetic circuit and a split ferrite core 20 formed by coupling the core bodies 20a and 20b with each other in held in a state that the core bodies 20a and 20b are combined with each other. The holding of the core 20 can be performed using a component for fixing, a resin, a metal case or the like.

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