JPH02283459A - Printing head of dot printer - Google Patents

Abstract

PURPOSE:To enable clear printing to be performed by a method wherein an ink passage passing through from one end at which printing is performed to the other end at which ink is supplied is provided to a printing wire, and an ink reservoir is established adjacent to the other end side of the printing wire. CONSTITUTION:When a current is made to flow to a coil assembly 11 of a yoke, an armature assembly 2 is attracted. A printing wire 3 fixed to a top of the armature assembly 2 is driven in a direction of printing paper 6 held around a platen 7 to perform printing. The printing wire 3 has an ink passage 3a thus, and ink 5 with which an ink reservoir 4 is impregnated is sent in the direction of the printing paper 6 through the ink passage 3a of the printing wire 3. Clear printing can be performed thereby by only coming in contact with the printing paper 6 of a top of the printing wire 4. When the armature assembly 2 is released, the other end of the printing wire 3 abuts against the ink reservoir 4 and the ink 5 is supplied.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electromagnetic print head for a dot printer.
In particular, the present invention relates to a print head for a dot printer that does not use a ribbon cassette.

[Prior Art] Conventionally, in the electromagnetic print head of this type of dot printer, a print wire is fixed to the tip of each armature, and a current is applied to a coil assembly of a yoke corresponding to each armature to drive the print wire and print. ing. In such dot printers, an ink ribbon is interposed between the print wire and the paper, and printing is performed by striking the ink ribbon with the tip of the print wire.

[Problem to be solved by the invention] In the electromagnetic print head of the conventional dot printer described above, printing was performed by hitting the ink ribbon with the tip of the print wire, so when installing the print head to the printer body, the ink ribbon The disadvantage was that it had to be attached and detached each time.

Additionally, during printing, the tip of the print wire may get caught on the ribbon, causing a problem that causes the tip of the print wire to break.6 [Means for Solving the Problems] By solving technical issues and not using an ink ribbon, it eliminates the need to attach and remove the ink ribbon when installing the print head to the printer body, and also avoids breaking the tip of the print wire due to getting caught on the ink ribbon. An object of the present invention is to provide a print head for a dot printer that is capable of printing.

The present invention provides a print head for a dot printer in which a print wire is fixed to the tip of each armature, and a current is applied to a coil assembly of a yoke corresponding to each armature to drive the print wire to print.
- The wire has an ink passage passing through it from one end where printing is performed to the other end where ink is supplied, and an ink reservoir is provided adjacent to the other end of the print wire.

[Example] Next, a print head of a dot printer according to the present invention will be described with reference to the drawings.

FIG. 1 is a longitudinal sectional view of an embodiment of a print head of a dot printer according to the present invention.

As shown in FIG. 1, a print head 10 of a dot printer according to the present invention has a predetermined number of armature assemblies 2, and a print wire 3 is fixed to the tip of each armature. As shown in FIGS. 2 to 4, the print wire 3 has an ink passage 3 passing through it from one end where printing is performed to the other end where ink is supplied.
It has a. An ink reservoir 4 impregnated with ink 5 is provided adjacent to the other end of the print wire 3 . Inside the print head 10, a yoke coil assembly 1 is provided corresponding to each armature assembly 2.

The print head 10 having such a configuration is placed opposite to the print paper 6 held around the platen 7.

Next, the operation of the print head of the dot printer according to the present invention will be explained.

When a current is applied to the coil assembly 1 of the yoke, the armature assembly 2 is attracted. As a result, the print wire 3 fixed to the tip of the armature assembly 2 is driven toward the printing paper 6 held around the platen 7 to perform printing.

As mentioned above, the print 1 to the wire 3 are connected to the ink passage 3.
The ink 5 impregnated in the ink reservoir 4 is sent in the direction of the printing paper 6 through the ink passage 3a of the printer 1 to the wire 3. In the print head of the present invention, printing can be performed only when the tip of the print wire 3 contacts the print paper 6. When the armature assembly 2 is released, the other end of the print wire 3 comes into contact with the ink reservoir 4, and the ink 5 is replenished.

[Effects of the Invention] As explained above, in the present invention, the printed wire is
It has an ink passage that passes through from one end where printing is performed to the other end where ink is supplied, and an ink reservoir is provided adjacent to the other end of the print wire, allowing clear printing without using an ink ribbon. Something comes up. Therefore, there is no need to attach or detach the ink ribbon when attaching the print head to the printer body, and it is also possible to avoid breakage of the tip of the print wire due to catching on the ink ribbon.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of a print head of a dot printer according to the present invention. FIG. 2 is a top view of the armature assembly not shown in FIG. 1. 3 is an enlarged plan view of the armature assembly of FIG. 2; FIG. 4 is an enlarged front view of the armature assembly of FIG. 2; FIG. 1... Coil assembly 2... Armature assembly 3... Print wire 3a... Ink passage 4
...Ink reservoir 5...Ink 6...
Print paper 7...Platen 10...Print head

Claims (1)

[Scope of Claims] A print head of a dot printer in which a print wire is fixed to the tip of each armature, and a current is applied to a coil assembly of a yoke corresponding to each armature to drive the print wire to print, the print wire comprising: A print head for a dot printer, characterized in that it has an ink passage passing through from one end where printing is performed to the other end where ink is supplied, and an ink reservoir is provided adjacent to the other end side of the print wire.