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1. 发明专利

JPH01182058A PRINTING HEAD OF WIRE DOT PRINTER 失效
公开(公告)号：JPH01182058A
公开(公告)日：1989-07-19
申请号：JP768888
申请日：1988-01-18
申请人： FUJI ELECTRIC CO LTD
发明人： SAITO SHIGEMASA , TACHIBANA YUKIMASA , HASHIMOTO TADAO
IPC分类号： B41J2/28 , B41J2/26
摘要： PURPOSE:To prolong the life of a printing head and accelerate printing action by selecting a dot-like welded part between printing wire and an armature, in a position where a bending stress appearing on the welded part becomes small when the armature is driven by a solenoid. CONSTITUTION:A groove-like recessed part 19 formed by curving a beam part is provided on an end 18a where printing wire 5 of the beam part 18 is fixed. Then the beam part 18 and wire 5 are welded in the form of dots at a point W in a state where one end 5a of the wire 5 is embedded in the recessed part 19. The point W is a central point of the size G of the tip 18a of the beam part. Each part is constituted in such a manner that an axial line along the longitudinal direction of a leaf spring 1, an axial line along the longitudinal direction of the body 17 of an armature, and the axial line of a virtual plane and printing wire which divides the thickness of an armature beam part 18 in two parts at said armature beam part 18, are included in a single virtual plane which is vertical with a paper surface, including an axial line Z-Z.

2. 发明专利

JPS6411044A PRODUCTION OF ARMATURE FOR PRINTING HEAD OF WIRE DOT PRINTER 失效
公开(公告)号：JPS6411044A
公开(公告)日：1989-01-13
申请号：JP16799687
申请日：1987-07-06
申请人： FUJI ELECTRIC CO LTD
发明人： SAITO SHIGEMASA
IPC分类号： B41J2/235 , B21K23/00 , C21D6/00 , C21D8/12
摘要： PURPOSE:To improve the speed of working to form contours by heating a cold rolled plate stock made of a magnetic material at a specific temp. for a specific period of time, then exerting compressive force perpendicularly to the plate face to compress the stock to a prescribed thickness, and blanking the stock perpendicularly to the plate plane, thereby forming an armature having the prescribed contours. CONSTITUTION:The cold rolled plate stock 20 consisting of an extremely soft mild steel or soft magnetic material contg. Si is subjected to heating and annealing for 3-5 hours at 800-950 deg.C and is then cut successively to a prescribed length. The compressive force is exerted to the stock 20 of the cut part perpendicularly to the plate plane thereof to form a compression molding 21 which is then blanked at dotted line parts to simultaneously form two pieces of the armatures 22. Printing wires are fixed by welding to a printing head 22b and dot printing is executed by the projecting action of the other end. The compressive force is not exerted to a magnetic path part 22a and the magnetic characteristics thereof are equal to the magnetic characteristics of the stock. The lever part 22b is compressed and work hardening is thereby generated in said part, by which the strength is increased and the printing quality is improved.

3. 发明专利

JPH1116745A RESIN-MOLDED WINDING 失效
公开(公告)号：JPH1116745A
公开(公告)日：1999-01-22
申请号：JP16780397
申请日：1997-06-25
申请人： FUJI ELECTRIC CO LTD
发明人： KAMITSUMA TATSUO , SAITO SHIGEMASA
IPC分类号： H01F27/28 , H01F27/32
摘要： PROBLEM TO BE SOLVED: To provide a resin-molded winding in which a winding sheet can be press-contacted with a connection conductor even if the winding sheet is thin. SOLUTION: In a resin-molded winding in which a winding sheet 2 composed of aluminum foil and an insulating sheet are coaxially wound in a state where the sheets are put upon another and the winding starting part and winding ending part of the sheet 2 are cold press-contacted with a connection conductor 1 composed of a copper plate. Then the sheets and conductor 1 are molded with a resin, the conductor 1 is lead out, and the sheet 2 is cold press-contacted with the conductor 1 together with a superposing sheet 3 composed of aluminum foil.

4. 发明专利

JPH08195458A SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPH08195458A
公开(公告)日：1996-07-30
申请号：JP610495
申请日：1995-01-19
申请人： FUJI ELECTRIC CO LTD
发明人： NISHIURA SHINJI , MOROZUMI AKIRA , SHIMIZU TOMIO , YAMADA KATSUMI , SAITO SHIGEMASA
IPC分类号： H01L23/02 , H01L21/48 , H01L23/15 , H01L23/24 , H01L23/373 , H01L23/48
摘要： PURPOSE: To enhance heat dissipation properties through thinning of the board itself without employing any special structure for relaxing the stress by employing inexpensive alumina powder as a principal material thereby enhancing the mechanical strength. CONSTITUTION: A CBC(CeramicBondingCupper) board 2 being employed in a power transistor module is made by bonding a foil-like copper plate 2c directly to the surface and rear of a ceramic board 2a by a direct bond cupper method, for example, and a circuit pattern is formed on the copper plate 2c on the major surface. The ceramic board 2a is produced by adding zirconia to a principal component of alumina and then adding 0.1-2wt.% of yttria, 0.02-0.5wt.% of calcia, 0.02-0.4wt.% of magnesia and 0.02-0.5wt.% of ceria thereto before sintering at high temperature. With such composition, bending strength is enhanced significantly as compared with a ceramic board made only of alumina and the thermal conductivity is enhanced furthermore. Since the board itself can be made thin, a semiconductor device excellent in heat dissipation properties can be obtained.

5. 发明专利

JPH0778392A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH0778392A
公开(公告)日：1995-03-20
申请号：JP22376193
申请日：1993-09-09
申请人： FUJI ELECTRIC CO LTD
发明人： SAITO SHIGEMASA
IPC分类号： G11B17/028 , G11B17/02 , G11B17/038 , G11B25/04
摘要： PURPOSE:To prevent the occurrence of a deformed area attending upon fixing a magnetic disk even on a small diametral and thin disk and to widely secure an effective data area and then to enhance the impact resistance of the disk by applying a new fixing structure to a spindle motor for the magnetic disk. CONSTITUTION:Under the state of putting the magnetic disk 4 upon a flange surface 2 by engaging a disk hole 5 of the magnetic disk 4 with a hub 3 to be engaged with a rotary shaft of the spindle motor 1, a lower electrode 11 in electrically conductive contact with a lower surface of the spindle motor 1 and an upper electrode 12 in electrically conductive contact with an upper surface of the magnetic disk 4 are arranged. A positive potential is impressed upon the hub 3 by using a DC power source 13 via the lower electrode 11 and a metal casing of the spindle motor 1. A magnetic potential is also impressed via the upper electrode 12 upon the magnetic disk 4. The magnetic disk 4 is integrally fixed with the hub 3 by forming a sticking part due to an electrostatic joint in a boundary surface between the lower surface of the magnetic disk 4 and the flange surface 2.

6. 发明专利

JPH0220675A WELDING METHOD FOR WIRE DOT PRINTER HEAD 失效
公开(公告)号：JPH0220675A
公开(公告)日：1990-01-24
申请号：JP16994788
申请日：1988-07-07
申请人： FUJI ELECTRIC CO LTD
发明人： SAITO SHIGEMASA
IPC分类号： B41J2/25 , B23K26/21
摘要： PURPOSE:To obtain a welding joined part having high fatigue strength by irradiating the surface of an armature part by a laser beam with respect to a corner part between the armature and a plate spring and forming a head fillet. CONSTITUTION:At the time of welding an armature 4 and a plate spring which are integrated into a wire dot printer head, first of all, in a state that the armature 4 has been superposed on a free end side of a plate spring lever piece 5b, spot welding is performed to two parts 13 of the opposed surface. Subsequently, fillet welding is executed by irradiating a corner part between the end face of the armature 4 and the upper face of the lever piece 5b by laser beam 15 from a laser device 14. By this welding, a fillet 16 of a hard alloy which has been generated by a reaction of a molten metal of the armature 4 and a chemical component of a plate spring material is formed. In such a way, a welding joined part having high fatigue strength is obtained, and the durability of a printer head whose printing operation is executed at a high speed and repeatedly is raised.

7. 发明专利

JP2001118482A CIRCUIT BREAKER 失效
公开(公告)号：JP2001118482A
公开(公告)日：2001-04-27
申请号：JP29601199
申请日：1999-10-18
申请人： FUJI ELECTRIC CO LTD , NIPPON SEISEN CO LTD
发明人： UCHIYAMA HIROSHI , SAITO SHIGEMASA , OGASAWARA MAKOTO , WATANABE KATSUMI , TANIMOTO YOSHINORI , WATANABE KAZUHIRO
IPC分类号： H01H71/12 , H01H71/00 , H01H71/10
摘要： PROBLEM TO BE SOLVED: To provide a circuit breaker with a coil spring meeting the JIS standard by improving the fatigue characteristics that may be designed to give an enough pressure with a small size even for a high level current. SOLUTION: A circuit breaker comprises a detector for detecting an abnormal current generated in the circuit, link structure for mechanically blocking the circuit in cooperation with the detector, press means for enabling the link structure to push the moveable contact part, and latch. The press means is a coil spring consisting of an austenitic stainless steel wire, whose composition is as follows based on its entire weight: C

8. 发明专利

JPH08195450A BOARD FOR SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPH08195450A
公开(公告)日：1996-07-30
申请号：JP610395
申请日：1995-01-19
申请人： FUJI ELECTRIC CO LTD , SUMITOMO KINZOKU ELECTRO
发明人： NISHIURA SHINJI , SAITO SHIGEMASA , MOROZUMI AKIRA , NOZAKI TOSHIO , MIYAMA HIROSHI , OOIWA SEIGO
IPC分类号： H01L23/13 , H01L23/15 , H01L23/373
摘要： PURPOSE: To improve heat dissipation properties through thinning of a board itself by adding zirconia to principal component of alumina and then adding one kind or more of additive, selected from a group of yttria, calcia, magnesia and ceria, thereto thereby preparing sintered ceramic having enhanced fracture toughness. CONSTITUTION: A ceramic board 2a is laminated on a heat dissipation base through adhesive or the like while being sandwiched by copper plates 2b, 2c thus constituting a CBC board 2. The ceramic board 2a in the CBC board 2 is produced by adding zirconia to principal component of alumina and then further adding one kind or more of additive selected from a group of yttria, calcia, magnesia and ceria thereby preparing a sintered cerarnic. Since the bending strength of the CBC board 2 is enhanced and the flexure thereof is increased, it can be made thin without causing any crack and the thermal conductivity can be enhanced geometrically.

9. 发明专利

JPH05217457A BONDING METHOD FOR SILVER CONTACT 失效
公开(公告)号：JPH05217457A
公开(公告)日：1993-08-27
申请号：JP604092
申请日：1992-01-17
申请人： FUJI ELECTRIC CO LTD
发明人： KONDO KAZUO , IMAMURA SEIJI , SAITO SHIGEMASA , AKIMOTO MAMORU , SUNAGA MITSUO
IPC分类号： H01H11/06
摘要： PURPOSE:To form a diffusion bonded layer in the neighborhood of the contact surfaces of both members by mounting a silver contact on a supporting body made of a coppers material and heating it at a predetermined temperature in a normal pressure nonoxidizing gas atmosphere. CONSTITUTION:A silver contact 1, whose surface is made of Ag, is mounted on a base metal 2 made of copper, and subsequently these are heated at the temperature of 780-850 deg.C in a furnace filled with a nonoxidizing gas atmosphere. An inner gas, such as nitrogen or argon, or a reduction gas, such as hydrogen or ammonia cracked gas, is used as the atmospheric gas. The heating causes Ag atoms in the contact 1 and Cu atoms in the base metal 2 to be interdiffused, thereby forming a diffusion bonded layer, which is an intermediate state between a solid and a liquid, due to the reaction between both contacting parts. Accordingly, the contact 1 can easily be adhered to the base metal 2 by slow cooling or quenching.

10. 发明专利

JPH03218607A MANUFACTURE OF OIL DASHPOT 失效
公开(公告)号：JPH03218607A
公开(公告)日：1991-09-26
申请号：JP22203690
申请日：1990-08-23
申请人： FUJI ELECTRIC CO LTD
发明人： SAITO SHIGEMASA , FUJITAKA HISASHI
IPC分类号： H01F7/14 , H01F41/02
摘要： PURPOSE:To prevent generation of oil leakage caused by cracks of an armature, and to contrive reduction in manufacturing cost by a method wherein the armature is formed by conducting an upsetting work on a soft steel wire material in which the content of phosphors and sulfur and the ferrite particle size of metal texture are specifically prescribed. CONSTITUTION:A plunger 7 and a compression spring 8 are housed in a cylinder 6 which is formed by drawing brass, and silicon oil is filled up therein. The aperture part of the cylinder 6 is closed by the armature 9 consisting of the large-diameter part 9a, which is brought into contact with the flange 6a of the cylinder 6, and a small-diameter part 9b which is fitted to a body part 6b. The above-mentioned armature 9 is formed by conducting an upsetting work on the soft steel wire material having the content of phosphorus and sulfur of 0.1wt.% respectively, and also having the ferrite particle size of metal texture of 7 to 8. As a result, the oil leakage caused by the cracks of the armature can be eliminated, the working manhours of the armature can be reduced, and the reduction in cost of an oil dashpot can also be achieved.

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