JPS57188390A - Driving device for typing hammer - Google Patents

Driving device for typing hammer

Info

Publication number
JPS57188390A
JPS57188390A JP7232581A JP7232581A JPS57188390A JP S57188390 A JPS57188390 A JP S57188390A JP 7232581 A JP7232581 A JP 7232581A JP 7232581 A JP7232581 A JP 7232581A JP S57188390 A JPS57188390 A JP S57188390A
Authority
JP
Japan
Prior art keywords
typing
hammers
hammer
coil
driving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7232581A
Other languages
Japanese (ja)
Inventor
Yuji Hosoda
Isao Nakajima
Shunji Murano
Kenichi Igarashi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koki Holdings Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Koki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd, Hitachi Koki Co Ltd filed Critical Hitachi Ltd
Priority to JP7232581A priority Critical patent/JPS57188390A/en
Publication of JPS57188390A publication Critical patent/JPS57188390A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)

Abstract

PURPOSE:To always obtain a constant typing hammer driving force without a driving pattern by mounting a coil for regulating an attracting magnetic flux in a magnetic circuit for a typing hammer driving device and controlling the coil in accordance with the number and the position of driving typing hammers. CONSTITUTION:When a driving coil 9 is energized based on typing information, a corresponding typing hammer is not attracted from the leg 7a of a core 7. At this time, some of typing hammers 5 of typing hammers driven due to nonuniformity of the elastic properties of the hammers 5 start precedingly from the others. Then the attracting magnetic force phi of a permanent magnet 10 is flowed to the following hammer 5, thereby tending to delay the operation. However, a control circuit 13 outputs in advance a drive current 15 via a typing signal 14 based on the combination of the data relative to the number and the adjacent position of the driven hammers 5 to a magnetic flux controlling coil 12, thereby adjusting the magnetomotive force of the magnet 10 and maintaining the attracting magnetic flux phi constant value.
JP7232581A 1981-05-15 1981-05-15 Driving device for typing hammer Pending JPS57188390A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7232581A JPS57188390A (en) 1981-05-15 1981-05-15 Driving device for typing hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7232581A JPS57188390A (en) 1981-05-15 1981-05-15 Driving device for typing hammer

Publications (1)

Publication Number Publication Date
JPS57188390A true JPS57188390A (en) 1982-11-19

Family

ID=13486011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7232581A Pending JPS57188390A (en) 1981-05-15 1981-05-15 Driving device for typing hammer

Country Status (1)

Country Link
JP (1) JPS57188390A (en)

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