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JPS55148179A - Printing hammer - Google Patents

Printing hammer

Info

Publication number
JPS55148179A
JPS55148179A JP5554179A JP5554179A JPS55148179A JP S55148179 A JPS55148179 A JP S55148179A JP 5554179 A JP5554179 A JP 5554179A JP 5554179 A JP5554179 A JP 5554179A JP S55148179 A JPS55148179 A JP S55148179A
Authority
JP
Japan
Prior art keywords
spring
yoke
retracting
coil
electric current
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.)
Granted
Application number
JP5554179A
Other languages
Japanese (ja)
Other versions
JPS6216829B2 (en
Inventor
Keiji Nakamura
Sadayuki Mihashi
Tokikazu Onodera
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP5554179A priority Critical patent/JPS55148179A/en
Publication of JPS55148179A publication Critical patent/JPS55148179A/en
Publication of JPS6216829B2 publication Critical patent/JPS6216829B2/ja
Granted 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 improve a resonance frequency and to enable a high speed printing by a method wherein a recess formed in the yoke is contacted with a resilient member and a spring having a relatively high stiffness due to an increased volume of magnetic flux. CONSTITUTION:Recess 12a1 is formed at a retracting end 12a of a yoke member 12, the yoke member 12 is abutted against and arranged at the permanent magnet 13. When no electric current is flowed in the coil 11, the spring 15 is retracted against a retracting end 12a of the yoke 12. As shown in Fig. (A), in addition to the magnetic flux 12b substantially perpendicular to the retracting surface, there are magnetic fluxs 12c flowing at both ends of the spring 15. When an electric current is applied to the coil 11 to release the retracting force, the condition shown in Fig. (B) is made, and the spring 15 is moved up to the free end of the spring to perform a printing operation. When the electric current in the coil 11 is turned off, the recess 12a1 in the yoke 12 starts to retract the spring 15. In this case, the retracting force applied to the spring 15 under an existence of the magnetic flux 12c may effectively and relatively act upon the spring which is positioned far from the yoke and at the same time the retracting force may be increased more.
JP5554179A 1979-05-07 1979-05-07 Printing hammer Granted JPS55148179A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5554179A JPS55148179A (en) 1979-05-07 1979-05-07 Printing hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5554179A JPS55148179A (en) 1979-05-07 1979-05-07 Printing hammer

Publications (2)

Publication Number Publication Date
JPS55148179A true JPS55148179A (en) 1980-11-18
JPS6216829B2 JPS6216829B2 (en) 1987-04-14

Family

ID=13001568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5554179A Granted JPS55148179A (en) 1979-05-07 1979-05-07 Printing hammer

Country Status (1)

Country Link
JP (1) JPS55148179A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123242U (en) * 1981-01-26 1982-07-31
JPS57123245U (en) * 1981-01-27 1982-07-31
EP1484185A1 (en) * 2003-02-06 2004-12-08 Printronix, Inc. Printer hammerbank with a magnetic shunt

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249119A (en) * 1975-10-10 1977-04-19 Florida Data Corp Styus type mechanism
JPS53137718A (en) * 1977-05-07 1978-12-01 Sharp Kk Hammer drive unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5249119A (en) * 1975-10-10 1977-04-19 Florida Data Corp Styus type mechanism
JPS53137718A (en) * 1977-05-07 1978-12-01 Sharp Kk Hammer drive unit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57123242U (en) * 1981-01-26 1982-07-31
JPH0116613Y2 (en) * 1981-01-26 1989-05-16
JPS57123245U (en) * 1981-01-27 1982-07-31
EP1484185A1 (en) * 2003-02-06 2004-12-08 Printronix, Inc. Printer hammerbank with a magnetic shunt

Also Published As

Publication number Publication date
JPS6216829B2 (en) 1987-04-14

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