JPS6116866A - Printing head - Google Patents

Abstract

PURPOSE:To facilitate wire inserting work by forming guide projecting sections along a plurality of guide holes on the armature side of a guide plate. CONSTITUTION:Guide projecting sections 12b, 13b are shaped to guide plates 12, 13 on the armature side of four guide plates 12, 13, 14, 15. The guide projecting section 12b, 13b take an oval shape conformed to the state of deflection of a printing wire 1 at the positions of the guide plate 12, 13 and forms thereof change according to where there are the guide plates. Consequently, the printing wire 1 is guided along the outsides of nose guide projecting sections 12b, 13b, 14b for the printing wire when the printing wire 1 is passed through guide holes 12a, 13a, 14a in guide plates 12, 13, 14, thus easily penetrating the printing wire 1 through the guide holes 12a, 13a, 14a.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a print head of a printer device widely used as an output device in an information processing device.

[Prior art and its problems]

Conventionally, this type of print head has been constructed using an armature 2. Core that attracts the amateur 3. York 4. A magnetic circuit system of the magnet 5, a coil 6 wound around its core 3, a coil spring 7 that is bent when the armature 2 is attracted, and a cap 8. Amateur guide 9 that guides the amateur 2 and supports the coil spring 7° cap 8. Amateur 2 stopper 10. A housing 11 covering these. Guide plate 12,1 that guides the printing wire 1
3, 14, 15 (a plurality of guide holes 12a, 13, respectively)
a, 14a, 15a), and a guide frame 16 that supports these guide plates.

The operating principle of this print head will be explained. While not printing,
The armature 2 is attracted to the core 3 and the yoke 4 by the attraction force caused by the magnetic flux generated from the magnet 5. At that time, the amateur 2 is connected to the coil spring 7 via the cap 8.
I'm spoiling it. When printing, when a directional pressure current is applied to the coil 6 to release the attractive force acting between the armature and the core, the armature 2 is pushed forward by the deflection energy of the coil spring 7 and attached to the armature 2. The wire 1 passes through the guide holes 12a to 15a of the guide plates 12 to 15, projects in the direction of the arrow, and is struck.

FIG. 2 is a perspective view specifically showing the state of the guide plate and printing wire in FIG. A large number of printing wires 1 are omitted and two are shown as representatives. This printing wire 1 requires a large number of dots for rounding to clearly print Kanji characters.

For this purpose, wires with a large number of wires, for example 16°, 18.
There are 24 pieces. Along with this, the wire diameter has become smaller and the number of flat guide plates 12 to 150 for guiding the printing wire 1 has also increased in order to prevent buckling.

However, all of the guide plates 12 to 15 have conventionally been flat plates having a large number of holes 128 to 15a through which one wire 1 passes, respectively. Therefore, it is a difficult task to find a large number of thin holes 12a-151 and pass the thin wires one by one.Assembling the print head therefore requires many man-hours and is expensive. was there.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks by guiding each wire using a guide protrusion provided on the armature side of a predetermined guide plate and inserting the wire into each guide hole as it is, thereby making the wire insertion work extremely easy. The purpose is to provide a removed print head.

[Structure of the invention]

To this end, the configuration of the present invention is such that a plurality of printing wires are sequentially inserted and supported through a plurality of guide holes of a plurality of flat guide plates, and armatures are not fixed to the ends of the printing wires.
In a wire dot matrix type print head in which the plurality of printing wires are displaced (by cooperation of the armature and the electromagnetic means) and printing dots are formed by pressing the other end of the wire, the armature of the predetermined guide plate 1 on the side
A guide convex portion is provided along the plurality of guide holes, and each mosquito wire is guided along the side surface of the guide convex portion and inserted through each guide hole.

[Embodiments of the invention]

Next, one embodiment will be described with reference to the drawings.

FIG. 3 is a perspective view of an embodiment of the print head according to the present invention;
FIG. 4 is a perspective view of another example of the negative guide plate of the print head.

Among the four guide plates 12.13 and 14.15, the gist of the present invention is applied to guide plate 12.13. Regarding the guide plate 12.13, there are guide protrusions 12b that guide the printing wire 1 through the guide holes 12a and 138K.
, 13b is ToJ), and the shape of the guide convex portions 12b, 13b is an ellipse shape corresponding to the bending state of the printing wire 1 at the position of the guide plate 12.13. In the present invention, the shape of the guide convex portion of the guide plate changes depending on the position of the guide plate. For example, when applied to the guide plate 14' of FIG. 4, which corresponds to the guide plate 14 of FIG. 3, the guide convex portion 14b has a straight vertical dimension and width. Pass the printing wire l through the guide holes 12Jl of the guide plates 12, 13, 14'.

13a, 1451, the printing wire 1 is guided along the outside of the tip guide convex portions 12b, 13b', 14b of the printing wire 1, so that the printing wire 1 is guided through the guide holes 12M, 1sa.

ltaK can be easily penetrated, and the number of man-hours required can be greatly reduced compared to conventional flat guide plates.

〔Effect of the invention〕

As explained above, according to the print head according to the present invention,
By guiding each wire using the guide protrusion provided on the armature side of a given guide plate and inserting it directly into each guide hole, there is an advantage that the wire insertion work is extremely easy and the number of man-hours can be reduced. .

[Brief explanation of drawings]

FIG. 1 is a sectional view of a printer device using a conventional print head, FIG. 2 is a perspective view of the print head, FIG. 3 is a perspective view of an embodiment of the print head according to the present invention, and FIG. FIG. 7 is a perspective view of another example of the negative guide plate of the print head. 1... Printing wire 2... Amateur 3...
・Core 4...Yoke 5...Macnet 6...Coil 7...Spring
8...Cap 9...Amateur guide 10...
・Stopper 11...Housing 12, 13, 14
．． 14', 15... Guide plates 12a, 13a, 14a
, 15a--guide holes 12b, 13b, 14b...
Guide convex portion 16...frame

Claims (1)

[Claims] A plurality of printing wires are sequentially inserted and supported through a plurality of guide holes of a plurality of flat guide plates, and an armature is fixed to the end of the wire, and the plurality of printing wires are connected by cooperation of the armature and electromagnetic means. In a wire dot matrix print head in which printed dots are formed by displacement of the wire and pressing of the other end of the wire, a guide convex portion along the plurality of guide holes is provided on the armature side of the predetermined guide plate, A print head characterized in that each wire is configured to be guided along a side surface of the guide convex portion and inserted into each of the guide holes.