JPH0164449U - - Google Patents

Info

Publication number
JPH0164449U
JPH0164449U JP1987158792U JP15879287U JPH0164449U JP H0164449 U JPH0164449 U JP H0164449U JP 1987158792 U JP1987158792 U JP 1987158792U JP 15879287 U JP15879287 U JP 15879287U JP H0164449 U JPH0164449 U JP H0164449U
Authority
JP
Japan
Prior art keywords
armature
displacement
detection circuit
magnetic flux
flux generated
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
JP1987158792U
Other languages
Japanese (ja)
Other versions
JP2539666Y2 (en
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 filed Critical
Priority to JP1987158792U priority Critical patent/JP2539666Y2/en
Priority to EP88113751A priority patent/EP0305871B1/en
Priority to DE8888113751T priority patent/DE3862722D1/en
Publication of JPH0164449U publication Critical patent/JPH0164449U/ja
Priority to US07/395,159 priority patent/US4940343A/en
Application granted granted Critical
Publication of JP2539666Y2 publication Critical patent/JP2539666Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Dot-Matrix Printers And Others (AREA)
  • Impact Printers (AREA)

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の一実施例を示す側断面図、第
２図は同実施例の要部平面図、第３図は同実施例
の要部斜視図、第４図は同実施例の制御系を示す
ブロツク図、第５図は同制御系の動作を示すタイ
ムチヤート、第６図は従来例の側断面図、第７図
はドライブタイムと印字ワイヤ変位の関係を示す
波形図である。 ２…永久磁石、７…板ばね、９…コア、１０…
コイル、１１…電磁石、１４…アーマチユア、１
５…印字ワイヤ、１７…検出基板、１８…固定極
、２４…検出回路、２５…ドライブ回路、２６…
制御部。 Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a plan view of the main part of the same embodiment, Fig. 3 is a perspective view of the main part of the same embodiment, and Fig. 4 is a diagram of the main part of the same embodiment. FIG. 5 is a block diagram showing the control system, FIG. 5 is a time chart showing the operation of the control system, FIG. 6 is a side sectional view of a conventional example, and FIG. 7 is a waveform diagram showing the relationship between drive time and printing wire displacement. . 2... Permanent magnet, 7... Leaf spring, 9... Core, 10...
Coil, 11... Electromagnet, 14... Armature, 1
5... Printing wire, 17... Detection board, 18... Fixed pole, 24... Detection circuit, 25... Drive circuit, 26...
control section.

Claims (1)

【実用新案登録請求の範囲】 永久磁石による吸引磁束によりアーマチユアを
吸引して板ばねを撓ませておき、該吸引磁束を電
磁石による消磁磁束で打ち消してアーマチユアを
解放することにより、アーマチユアの先端に固着
した印字ワイヤを駆動するドツト印字ヘツドの構
造において、 前記アーマチユアの変位方向に、微小空間を隔
てて対面する電極と、 前記電極の静電容量の変化よりアーマチユアの
変位置を検出する検出回路と、 印字時、前記検出回路の検出したアーマチユア
の変位量に応じて、前記電磁石の励磁時間を決定
するドライブ回路を設けたことを特徴とするドツ
ト印字ヘツドの構造。[Claim for Utility Model Registration] The armature is attracted by the magnetic flux generated by a permanent magnet to bend the leaf spring, and the magnetic flux is canceled by the demagnetizing flux generated by the electromagnet to release the armature, thereby fixing it to the tip of the armature. The structure of a dot printing head that drives a printed printing wire includes: an electrode facing the armature across a small space in the direction of displacement of the armature; a detection circuit that detects a displacement of the armature from a change in capacitance of the electrode; A structure of a dot print head, characterized in that a drive circuit is provided for determining the excitation time of the electromagnet according to the amount of displacement of the armature detected by the detection circuit during printing.
JP1987158792U 1987-08-26 1987-10-19 Control structure of dot print head Expired - Lifetime JP2539666Y2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1987158792U JP2539666Y2 (en) 1987-10-19 1987-10-19 Control structure of dot print head
EP88113751A EP0305871B1 (en) 1987-08-26 1988-08-24 Wire-dot print head driving apparatus
DE8888113751T DE3862722D1 (en) 1987-08-26 1988-08-24 APPARATUS FOR OPERATING A NEEDLE PRINT HEAD.
US07/395,159 US4940343A (en) 1987-08-26 1989-08-17 Wire-dot print head driving apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1987158792U JP2539666Y2 (en) 1987-10-19 1987-10-19 Control structure of dot print head

Publications (2)

Publication Number Publication Date
JPH0164449U true JPH0164449U (en) 1989-04-25
JP2539666Y2 JP2539666Y2 (en) 1997-06-25

Family

ID=31439440

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1987158792U Expired - Lifetime JP2539666Y2 (en) 1987-08-26 1987-10-19 Control structure of dot print head

Country Status (1)

Country Link
JP (1) JP2539666Y2 (en)

Also Published As

Publication number Publication date
JP2539666Y2 (en) 1997-06-25

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