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81. 发明专利

JPH0655746A PRINTING HEAD 失效
公开(公告)号：JPH0655746A
公开(公告)日：1994-03-01
申请号：JP13311892
申请日：1992-05-26
申请人： NEC CORP
发明人： KIMURA NOBUO
IPC分类号： B41J2/275 , B41J29/08
摘要： PURPOSE:To ensure that a stopper part and an armature become less abraded by making T-shaped an area which comes in contact with the armature of the stopper part for determining the return position of the armature. CONSTITUTION:An armature 2 which is attracted by a coil assembly 1 returns to a home position by force of a spring 8, if the assembly is shut off from an electric current supply. In this case, the rear of the armature 2 runs into the stopper part 5, thus causing the armature to come to a stop. The stopper part 5 is T-shaped so that the area which comes in contact with the armature 2 becomes large. Since the armature 2 comes in contact with the T-shaped part 7, the stopper part and the armature are less abraded, if they collide with each other.

82. 发明专利

JPH0655745A PRINTING HEAD OF DOT IMPACT-TYPE PRINTER 失效
公开(公告)号：JPH0655745A
公开(公告)日：1994-03-01
申请号：JP10457892
申请日：1992-04-23
申请人： NEC CORP
发明人： KIMURA NOBUO
IPC分类号： B41J2/275 , B41J29/08
摘要： PURPOSE:To prevent an armature and an armature receiving member from becoming abraded. CONSTITUTION:The subject dot impact-type printer is composed of an armature which allows one end part to be attracted by an excitation coil 1 and a printing wire 3 provided on the other end part to print data by hammering when energized, and an armature receiving member 4 which regulates a home position for the armature when deenergized. In addition, the printer is equipped with a bent part 5 for extending a contact area at a spot where the armature 2 comes in contact with the armature receiving member 4, and a damping member 6 at a spot where the armature receiving member 4 comes in contact with the bent part 5.

83. 发明专利

JPH0654098A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0654098A
公开(公告)日：1994-02-25
申请号：JP20348592
申请日：1992-07-30
申请人： RICOH KK
发明人： OHASHI MASATO
IPC分类号： B41J29/08 , G03B27/52 , G03G15/00 , G03G15/20 , G03G21/00 , G03G21/20 , H04N1/00
摘要： PURPOSE:To improve the operation convenience in connection with the environ ment of an office by reducing the generating noise of the image forming device related to the environment noise measured by microphone at the standby before being transferred to copying operation. CONSTITUTION:The noise source at the standby of a copying machine 1 is an exhaust heat fan and polygon motor. The noise is discharged outside through an exhauster port 6. A microphone 5 arranged at the side of a paper feeding set 8 on the front of the copying machine 1 is located opposite to the exhauster port 6, and the environment noise at the standby of the copying machine 1 can be measured without being affected by the sound generated by the copying machine 1. When the environment noise is bigger than the reference noise set in advance to a comparison means in the copying machine 1, the rotation control of the polygon motor is not performed and when the environment noise is smaller than the reference noise, the rotation of the polygon motor is stopped. The rotation control of the polygon motor is released when an enter key 22 is operated before operating a copy start button.

84. 发明专利

JPH0640122A DOT IMPACT PRINTING HEAD 失效
公开(公告)号：JPH0640122A
公开(公告)日：1994-02-15
申请号：JP19849992
申请日：1992-07-24
申请人： BROTHER IND LTD
发明人： KAWAI TAKAMITSU
IPC分类号： B41J2/235 , B41J29/08 , B41J29/377
摘要： PURPOSE:To accelerate a heat dispersion and prevent a leak of a noise in a dot impact printing head. CONSTITUTION:At the back of a head body 1 formed by radially arraging a plurality of printing apparatuses 3 each driving a printing wire 7 by a piezoelectric element 10, the printing apparatuses 3 are enclosed by an inner cover body 2. An outer cover body 4 is fitted over the outer surface of a base part 1a of the head body and the outer peripheral surface of the inner cover body 2 so as to be spaced an appropriate gap 5. In the gap 5, a separation body 6 made of a material having a superior heat conductivity is interposed so as to abut on the wall surfaces of the inner and outer cover bodies. The separation body 6 having a long, hollow, tubular form is arranged in the gap 5 in spiral form and in coil form.

85. 发明专利

JPH0634901A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0634901A
公开(公告)日：1994-02-10
申请号：JP19544792
申请日：1992-07-22
申请人： KONISHIROKU PHOTO IND
发明人： TAJIMA NAOKI
IPC分类号： B41J2/44 , B41J29/08 , G02B26/10 , G03G15/04 , H04N1/036
摘要： PURPOSE:To prevent dust and foreign matters from sticking on the respective members of an optical system which constitute an image exposing means and protect them by holding an elastic member between a storage container and a shield member. CONSTITUTION:The optical members such as a polygon mirror 131 and a semiconductor laser beam emitting device 136 are arranged and fitted to the top and the reverse surface of the inner partition wall of the storage container 130, the upper part and the lower part of the inner partition wall are covered with a cover 140 made of a sheet metal and protected, and airtight elastic members S1 and S2 are pressed and held at the part of the cover 140, etc., there between which is in contact with the storage container 130 to prevent dust, foreign matters, etc., from entering the storage container 130.

86. 发明专利

JPH068581A NOISE PREVENTING MECHANISM OF IMAGE FORMING APPARATUS 失效
公开(公告)号：JPH068581A
公开(公告)日：1994-01-18
申请号：JP16940192
申请日：1992-06-26
申请人： CANON KK
发明人： NAKANE NAOHIRO
IPC分类号： B41J29/08 , G03G15/00 , G03G21/00 , G10K11/16 , G10K11/178 , H02K5/24
摘要： PURPOSE:To reduce the noise of a rotary body by the interference with the sound of which the phase is reverse to that of the noise of a rotary body such as a fan and having the same sound pressure as the noise emitted from a newly provided speaker. CONSTITUTION:The number of rotations of a cooling fan 2 is measured by a number-of-rotation detection circuit 55 to be inputted to a digital/analogue processor 50 (hereinbelow referred to as DSP) to operate the noise frequency of the fan in the DSP 50. This frequency is set to a reference signal and a signal reverse to fan noise in phase and having the same amplitude as the fan noise is formed by the digital filter and delay circuit in the DSP 50 and a control speaker 3 is sounded through a D/A converter 51 and a power amplifier 52. Next, the reduction effect of noise due to mutual interference is measured by an evaluation microphone 4 to be inputted to the DSP 50 through a microphone amplifier 54 and an A/D converter 53 and, by adapting the digital filter in the DSP 50 so as to reduce the noise from a microphone 4, the noise 2 of the fan 2 can be reduced.

87. 实用新型

JPH06762U 失效
公开(公告)号：JPH06762U
公开(公告)日：1994-01-11
申请号：JP4161492
申请日：1992-06-17
IPC分类号： B41J29/13 , B41J29/08

88. 发明专利

JPH061042A IMPACT DOT PRINTER 失效
公开(公告)号：JPH061042A
公开(公告)日：1994-01-11
申请号：JP15942992
申请日：1992-06-18
申请人： SEIKO EPSON CORP
发明人： KOSHIISHI OSAMU , KUBOTA KEIICHI , MIZUNO SHIGEKI , NISHIZAWA KATSUHIKO , SHIROTORI HIROSHI , NIIMURA MOTOYUKI
IPC分类号： B41J29/08
摘要： PURPOSE:To provide an impact dot printer reduced in noise and made excellent in paper discharge properties by providing a plurality of printing paper guide members in the direction crossing a plate-shape sound suppressing member partially changing the cross-sectional area of a printing paper discharge route on the way thereof at a right angle and making the interval between said guide members narrower than the width of printing paper. CONSTITUTION:Covers 1,2 covering a printing paper discharge part are provided to an impact dot printer 100 equipped with a print head 8 and a platen 6. A printing paper discharge route is formed between the covers 1, 2 and the printing paper discharge part 15 and the cross-sectional area of the route is partially changed on the way thereof. In this impact dot printer 100, a plurality of printing paper guide members 1d, 2d are provided in the direction crossing plate- shape sound suppressing members 1a, 2a partially changing the cross-sectional area of the printing paper discharge route on the way thereof at a right angle and the interval between said guide members is made narrower than the width of printing paper 4. As a result, the impact dot printer is reduced in noise and made excellent in paper discharge properties.

89. 实用新型

JPH0595756U 失效
公开(公告)号：JPH0595756U
公开(公告)日：1993-12-27
申请号：JP3714892
申请日：1992-06-02
IPC分类号： B41J29/08 , B41J29/10

90. 实用新型

JPH0588964U 失效
公开(公告)号：JPH0588964U
公开(公告)日：1993-12-03
申请号：JP3184292
申请日：1992-05-14
IPC分类号： B41J15/04 , B41J29/08

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