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1. 发明专利

JPH06218952A WIRE DOT PRINTING HEAD 失效
公开(公告)号：JPH06218952A
公开(公告)日：1994-08-09
申请号：JP1214393
申请日：1993-01-28
申请人： FUJITSU LTD , FUJITSU ISOTEC LTD
发明人： KON SHINJI , TAKAZAWA TSUTOMU , KITSUNAI HISAAKI
IPC分类号： B41J2/26
摘要： PURPOSE:To obtain the sufficient bonding strength in the soldering of a wire and a beam in the wire dot printing head of a printer. CONSTITUTION:In a wire dot printing head having the beam 7 connected to an armature and having a wire 11 connected to the leading end thereof, a rough surface 12 is formed to the surface of the soldered part of the wire 11 to increase a bonding area. Grooves may be formed in place of the rough surface 12.

2. 发明专利

JPH05147230A WIRE DOT PRINT HEAD 失效
公开(公告)号：JPH05147230A
公开(公告)日：1993-06-15
申请号：JP31121191
申请日：1991-11-27
申请人： FUJITSU LTD
发明人： TAKAZAWA TSUTOMU , MURATA AKINORI , KON SHINJI , YAMAKI SHUICHI , YOSHIDA MITSUHIRO
IPC分类号： B41J2/25 , B41J2/26 , B41J2/28
摘要： PURPOSE:To provide a print head having a high performance by adjusting the weight of a movable part to a value coinciding with the natural frequency. CONSTITUTION:An end part 1a of the opposite side of the printing side of a print wire 1 is projected from the apex of ax armature 4 in the retreating direction and is fixed. The wt. of a movable part 5 constituted of the armature 4 and the print wire 1 is made adjustable by cutting the end part 1a so as to coinside with the natural frequency of a print head. In addition, adjustment is performed by fixing a wt. with a proper wt. to the projected end part 1a by means of adhesion. The wt. of the movable part 5 can be easily adjusted so as to coincide with the natural frequency of the print head only by cutting the end part 1a of the opposite side of the printing side of the print wire or fixing the wt. with a proper wt.

3. 发明专利

JPH04336269A PRINTER 失效
公开(公告)号：JPH04336269A
公开(公告)日：1992-11-24
申请号：JP10784391
申请日：1991-05-14
申请人： FUJITSU LTD
发明人： TAKAZAWA TSUTOMU , SUEYOSHI KENICHI
IPC分类号： B41J25/308
摘要： PURPOSE:To prevent printing quality from deterioration by rise in temperature of a printing head for a printer. CONSTITUTION:The subject printer is constructed by providing a temperature detection part 2 which detects temperature of a printing head, a recording part 3 which records a dependent property on temperature of an optimum gap value preliminarily measured between the printing head and a platen, a control part 4 which calculates the optimum gap value at temperature detected with the temperature detection part 2 above-mentioned based on the recording part 3 above-mentioned, and a gap regulation part 5 which sets the gap value between the printing head and the platen to a value calculated with the control part 4 above-mentioned.

4. 发明专利

JPH02165966A PRINTING HEAD 失效
公开(公告)号：JPH02165966A
公开(公告)日：1990-06-26
申请号：JP32046188
申请日：1988-12-21
申请人： FUJITSU LTD
发明人： TAKAZAWA TSUTOMU
IPC分类号： B41J2/28
摘要： PURPOSE:To prevent printing force from decreasing due to thermal expansion in a boundary of adhesive layer of a permanent magnet coupling part based on the heat generation of a coil by coupling a yoke for holding the permanent magnet to a magnet base through a fixed coupling member. CONSTITUTION:A coupling member 11 is fixed to the periphery of a magnet base 1 and the periphery of a yoke 4 in a state that the lower and upper faces of a permanent magnet 3 are brought into contact with the other end of the magnet base 1 and the yoke 4, thereby coupling the magnet base 1 for holding the permanent magnet 3 to the yoke 4. The coupling member 11 is fixed by brazing 12. Thus, since the yoke 4 is coupled through the coupling member 11 and adhesive is not used, influence to the magnetic properties due to the thermal expansion of the adhesive can be eliminated to prevent a printing force from decreasing.

5. 发明专利

JPS62270345A PRINT HEAD FOR WIRE DOT PRINTER 失效
公开(公告)号：JPS62270345A
公开(公告)日：1987-11-24
申请号：JP11360186
申请日：1986-05-20
申请人： FUJITSU LTD
发明人： SUEYOSHI KENICHI , TOUJIYOU YOSHIKAGE , TAKAZAWA TSUTOMU
IPC分类号： B41J2/275
摘要： PURPOSE:To enable high speed printing and to minimize the abrasion of fulcrum by moving an armature from a first fulcrum to a second fulcrum as an armature is rocked by means of an electromagnet. CONSTITUTION:When a current is fed to a coil 3-2 so as to excite an electromagnet 3, one end side 1c of an armature 1 is attracted by the electromagnet 3 and starts rocking in the direction of an arrow (a) around a first fulcrum P1. At a time point when the armature 1 arrives to a printing position shown by a dashed, line 1-1, the fulcrum of the armature 1 moves to a second point P2. A print wire 2 is interlocked with the rocking motion of said armature 1 to move in the direction of the arrow (a) thus performing the printing operation. Upon completion of printing operation, power supply to the coil 3-2 is interrupted to eliminate the magnetic force of the electromagnet 3, thereby the armature 1 starts rocking in the direction of an arrow (b) around the second fulcrum P2 and moves to the first fulcrum P1 when it is reset to the original non-printing position. Such rocking motion of the armature 1 causes reciprocal motion of the wire 2 in the direction of arrows (a), (b) thus performing the printing.

6. 发明专利

JPS57110462A PRINTING HEAD FOR DOT PRINTER 失效
公开(公告)号：JPS57110462A
公开(公告)日：1982-07-09
申请号：JP18721680
申请日：1980-12-29
申请人： FUJITSU LTD
发明人： NAKATANI MAKOTO , MATSUOKA EIJI , MIZUKI TSUTOMU , SEKI MINORU , TAKAZAWA TSUTOMU , TAKOU HIDEHIKO
IPC分类号： B41J2/28 , B41J2/26
摘要： PURPOSE:To reduce the operation time with a lighter armature by constructing an armature with an elastic member and a beam member engaged with a printing wire while the elastic member is formed in such a plate as to horizontal from the direction of deflection to that of oscillation. CONSTITUTION:An armature 21 composed of a plate spring 21A fastened on a block 218 made of a magnetic material, a beam 21C fastened on the block 21B and a printing wire 11E connected to the beam 21C. The plate spring 21A is so arranged that it meets a specified spring constant to eliminate deformation during the printing, while the value (l) is lessened within a allowable stress. The value (b) is restricted by a space which is adjacent to the armature 21. This can reinforce the armature 21 with the beam 21C in the direction of a force working on the printing, while ensuring a lighter weight thereof. Thus, a high speed driving is possible.

7. 发明专利

JPH0460030B2 失效
公开(公告)号：JPH0460030B2
公开(公告)日：1992-09-24
申请号：JP9996084
申请日：1984-05-18
申请人： FUJITSU LTD
发明人： MATSUOKA EIJI , TAKAZAWA TSUTOMU
IPC分类号： B41J32/02 , B41J35/04

8. 发明专利

JPH0449477B2 失效
公开(公告)号：JPH0449477B2
公开(公告)日：1992-08-11
申请号：JP6090686
申请日：1986-03-20
申请人： FUJITSU LTD
发明人： TAKAZAWA TSUTOMU , TOJO YOSHIKAGE
IPC分类号： B41J2/30 , B41J2/235 , B41J2/27 , B41J29/00 , B41J29/38

9. 发明专利

JPH022710B2 失效
公开(公告)号：JPH022710B2
公开(公告)日：1990-01-19
申请号：JP11971881
申请日：1981-07-30
申请人： FUJITSU LTD
发明人： NAKATANI MAKOTO , TAKAZAWA TSUTOMU
IPC分类号： B41J2/28

10. 发明专利

JPS6334033B2 失效
公开(公告)号：JPS6334033B2
公开(公告)日：1988-07-07
申请号：JP7291182
申请日：1982-04-30
申请人： FUJITSU LTD
发明人： WADA KAZUYUKI , TAKAZAWA TSUTOMU , IMAMURA SHINICHIRO , SHIMOBUCHI HIDEMOTO , MIZUNO JUICHI
IPC分类号： B41J25/308 , B41J25/312 , B41J25/316

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