JPS5756274A - Apparatus for driving dot hammer - Google Patents

Apparatus for driving dot hammer

Info

Publication number
JPS5756274A
JPS5756274A JP12910780A JP12910780A JPS5756274A JP S5756274 A JPS5756274 A JP S5756274A JP 12910780 A JP12910780 A JP 12910780A JP 12910780 A JP12910780 A JP 12910780A JP S5756274 A JPS5756274 A JP S5756274A
Authority
JP
Japan
Prior art keywords
hammer
core
printing
spring
separated
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
JP12910780A
Other languages
Japanese (ja)
Inventor
Masataka Oota
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP12910780A priority Critical patent/JPS5756274A/en
Publication of JPS5756274A publication Critical patent/JPS5756274A/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
    • B41J9/36—Means for operating hammers to effect impression in which mechanical power is applied under electromagnetic control

Landscapes

  • Impact Printers (AREA)

Abstract

PURPOSE:To make high speed printing possible without alterning the printed quality, by providing a driving spring that is positioned between a core and a hammer when the hammer is attracted during the non-printing period, and separated from the core together with the hammer and then disengaged from the hammer when printing is carried out. CONSTITUTION:In the apparatus for driving a dot hammer wherein a magnetic path is formed from a yoke 3, a permanent magnet 2, the core 4 around which a coil 5 is wound and a dot printing member 1a, and when it is not in operation, the hammer 1 is attracted to the core 4, and when it is in operation, an electric current is passed through the coil 5 to cancell the magnetic flux so that the hammer 1 is separated from the core 4 to perform the printing, the driving spring 10 is provided which is magnetic, has a relatively high free vibration frequency, and is positioned between the hammer 1 and the yoke 3 and the core 4. When it is not in operation, the spring 10 is attracted together with the hammer 1 to the core 4, and when it is in operation, the spring 10 is separated from the core 4 together with the hammer 1, and then only the hammer 1 reaches a platen and then returns the original position due to the difference of the free vibration frequency, so that the printing can be performed at a cycle faster than the free cycle of the hammer 1.
JP12910780A 1980-09-19 1980-09-19 Apparatus for driving dot hammer Pending JPS5756274A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12910780A JPS5756274A (en) 1980-09-19 1980-09-19 Apparatus for driving dot hammer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12910780A JPS5756274A (en) 1980-09-19 1980-09-19 Apparatus for driving dot hammer

Publications (1)

Publication Number Publication Date
JPS5756274A true JPS5756274A (en) 1982-04-03

Family

ID=15001236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12910780A Pending JPS5756274A (en) 1980-09-19 1980-09-19 Apparatus for driving dot hammer

Country Status (1)

Country Link
JP (1) JPS5756274A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833242U (en) * 1981-08-28 1983-03-04 富士通株式会社 Print head for dot printer
JPS60150045U (en) * 1984-03-17 1985-10-05 ジューキ株式会社 printer print head

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833242U (en) * 1981-08-28 1983-03-04 富士通株式会社 Print head for dot printer
JPS60150045U (en) * 1984-03-17 1985-10-05 ジューキ株式会社 printer print head
JPH049167Y2 (en) * 1984-03-17 1992-03-06

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