JPH0477449U

JPH0477449U -

Info

Publication number: JPH0477449U
Application number: JP12232990U
Authority: JP
Priority date: 1990-11-20
Filing date: 1990-11-20
Publication date: 1992-07-07

Description

[Brief explanation of the drawing]

第１図は、本考案の一実施例を示すワイヤドツ
ト印字ヘツドの要部断面図、第２図は、力−変位
特性図、第３図は、アーマチユアヨークの構成を
示すワイヤドツト印字ヘツドの要部断面図、第４
図は、各部の動作特性を示す波形図、第５図は、
アーマチユアの飛行時間特性図、第６図〜第９図
は従来技術を示し、第６図は、ワイヤドツト印字
ヘツドの力−変位特性図、第７図は、アーマチユ
アヨークの構成を示すワイヤドツト印字ヘツドの
要部断面図、第８図は、各部の動作特性を示す波
形図、第９図は、ワイヤドツト印字ヘツドの要部
断面図である。１……印字ワイヤ、３……アーマチユア、４…
…アーマチユアヨーク、６……永久磁石、１０…
…消磁コイル、１１……アーマチユア吸引コア、
１３……バイアス用板ばね。 Fig. 1 is a sectional view of the main parts of a wire dot printing head showing an embodiment of the present invention, Fig. 2 is a force-displacement characteristic diagram, and Fig. 3 is a diagram of the wire dot printing head showing the structure of the armature yoke. Main part sectional view, 4th
The figure is a waveform diagram showing the operating characteristics of each part.
Figures 6 to 9 show the prior art. Figure 6 is a force-displacement characteristic diagram of the wire dot printing head. Figure 7 is a wire dot printing diagram showing the configuration of the armature yoke. FIG. 8 is a waveform diagram showing the operating characteristics of each part. FIG. 9 is a sectional view of the main part of the wire dot printing head. 1... Printing wire, 3... Armature, 4...
... Armature yoke, 6... Permanent magnet, 10...
... Demagnetizing coil, 11... Armature suction core,
13... Bias leaf spring.

Claims

[Scope of Claim for Utility Model Registration] An armature having a printing wire fixed to its tip is attached to a bias leaf spring, one end of the bias leaf spring is supported in a cantilever on the printing head main body side, and is opposed to the armature. The armature is provided with an armature suction core, and the armature is always magnetically attracted to the armature suction core by the magnetic flux of a permanent magnet passing through the armature yoke provided close to the armature, and the armature is suctioned during printing. A driving current is supplied to a degaussing coil wound around the core to generate a magnetic flux for canceling the magnetic flux of the permanent magnet, thereby separating the armature from the armature attraction core, and applying the elastic force of the bias leaf spring. In the wire dot printing head, the armature is swung by the wire dot printing head to cause the printing wire to protrude in front of the printing head for printing. A wire dot printing head characterized in that the length of the protruding portion is formed short so that the tip thereof does not catch on the armature suction core.