JPS6399962A - Printing head of dot printer - Google Patents

Abstract

PURPOSE:To enable only broken printing wire to be replaceable and thereby reduce cost by mounting printing wire to an armature arm in an attachable/ detachable manner through a mounting member. CONSTITUTION:Printing wire 1 is mounted in an attachable/detachable manner to an armature arm 11 on the main body 10 of a printing head through a sheet metal 2 as a mounting member. The printing wire 1 is fixed to the upper part of the sheet metal 2 by brazing. The sheet metal 2 should be one which can easily be subjected to plastic deformation, and bent parts 2a, 2a are formed on both sides of the sheet metal 2 along the upper width of the armature arm 11. Between these bent parts 2a, 2a the upper part of the armature arm 11 is introduced and caulked, and printing wire 1 is securely installed on the upper part of the armature arm 11. If the upper part is slightly uncaulked, the printing wire is easily removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a print head for a dot printer in which the end of a print wire is attached to the end of an armature arm.

[Prior Art] This type of print head consists of a print wire 50 and a print head 60 that drives the print wire 50, as shown in FIG. spring 63
, and a yoke 64. Conventionally, the printing wire 50 was brazed to the upper end of the armature arm 61.

Note that the armature arm 61 is brazed to the armature block 62.

[Problems to be Solved] In the conventional print head described above, the print wire 50
was brazed to armature arm 61,
If even one printing wire 50 is broken for some reason, it is necessary to replace not only the printing wire 50 but also the armature arm 61 and the armature block 62 to which the armature arm 61 is brazed. There was a problem that the cost was high.

The present invention has been made in view of the above conventional problems,
To provide a print head for a dot printer capable of reducing costs by allowing only the broken print wire to be replaced when the print wire is broken.

[Means for Solving Problems] Therefore, in the present invention, in the print head of a dot printer in which the end of the printing wire is attached to the end of the armature arm, the printing wire can be attached to and detached from the armature arm via a mounting member. The purpose of this invention is to achieve the above object by adopting a configuration in which the device can be attached.

[Example 1] An example of the present invention will be described below with reference to FIGS. 1 and 2.

The print head of this embodiment consists of a print wire 1 and a print head main body 10 that drives the print wire 1, and the print wire 1 is attached to and detached from an armature arm 11 of the print head main body 10 via a metal plate 2 as an attachment member. installation possible.

The armature arm 11 is attached to its lower end or to the armature block 12 by brazing, and has a shape whose width gradually becomes narrower as it goes upward. In addition,
Armature block 12 is armature spring 1
It is joined to the top of 3.

The printing wire 1 is attached to the top of the sheet metal 2 by brazing.

The sheet metal 2 used is one that can be easily plastically deformed. On both sides of the sheet metal 2, bent portions 2a are provided along the upper width of the armature arm 11 in order to facilitate attachment to the armature arm 11.

2a is formed. And this bent part 2a.

The printing wire 1 is firmly attached to the upper part of the armature arm 11 by crimping the bent portions 2a, 2a with the upper part of the armature arm 11 inserted between the wires 2a. On the other hand, the bent portion 2a.

By loosening the caulking of 2a, the printing wire 1 can be easily removed.

As described above, according to this embodiment, the bent portion 2a of the sheet metal 2,
By caulking 2a, the printing wire 1 can be firmly attached to the armature arm 11 via the metal plate 2. Furthermore, even if the printing wire 1 is broken for some reason, by loosening the caulking of the bent parts 2a and 2a of the sheet metal 2, only the broken printing wire 1 can be removed, and the printing wire 1 and the sheet metal 2 can be separated. Can be exchanged in units.

[Effects of the Invention] As described above, in the present invention, the printing wire is removably attached to the armature arm via the mounting member, so when the printing wire is broken, only the broken printing wire and the mounting member need to be replaced. Therefore, compared to the conventional method in which other parts such as the armature arm and the like in addition to the printing wire must be replaced, it is possible to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing how a print wire and a sheet metal are attached, and FIG. 3 is a longitudinal sectional view of a conventional print head. 1: Print wire 2: Sheet metal 2a: Bent part 10: Print head body 11: Armature arm

Claims (1)

[Claims] A print head for a dot printer in which an end of a printing wire is attached to an end of an armature arm, characterized in that the printing wire is detachably attached to the armature arm via a mounting member. The print head of a dot printer.