JPS612573A - Movable device for dot printing head - Google Patents

Abstract

PURPOSE:To enable a printing wire to be accurately fitted without using jigs, by a method wherein a projection member for fixing a printing wire is provided on the back side of a lever, the wire is fitted to the lever by brazing or other means, and then the projection member is cut away. CONSTITUTION:With the projection members 11a, 11b provided on the back side of the lever 11, it is possible to accurately set the fitting angle theta and the length (l) of the printing wire 3 without using jigs. After fitting the wire 3 to the tip of the lever 11 by brazing or other means, the projection members 11a, 11b are cut away at the joint part A of the lever 11 and the projection member 11a, whereby the movable device for the dot printing head can be easily manufactured with high accuracy. Accordingly, a reduction in the manufacturing cost can be contrived.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention uses a print head used in a dot-type wire printer, and in particular, prints characters such as kanji at high speed and with high precision using a large number of arranged printing wires. The present invention relates to a movable device for a dot printer print head configured to perform printing.

Structure of conventional examples and their problems In recent years, information processing by computers has progressed due to advances in computers and peripheral technology, and in the field of office automation, there is a need for kanji information processing that takes advantage of the characteristics of Japanese that are easy to read and understand. It is increasing. Along with this, various printers are being developed, and among these printers, wire dot printers that can print on various types of paper and are inexpensive are rapidly developing.

Therefore, a wire dot type print head for Kanji printers in which a plurality of printing wires and drive elements are arranged has been developed as a print head for dot printers, and measures such as higher speed, smaller size, and lower noise are desired.

A conventional print head for a dot printer will be explained below.

FIG. 1 is a simplified cross-sectional view of the structure of a movable device for a conventional dot printer print head. First, a conventional dot printer print head will be described with reference to FIG. This print head adopts a spring-charge type printing wire drive system, and the printing wire movable part has an armature 2 attached to the tip of the drive plate pie 1, and an armature 2
A lever 4 to which a printing wire 3 is attached is attached.

In this state, the printing wire 3 is inserted into the holes 6a and 7a of the intermediate guide 6 and wire guide 7 attached to the head housing 5 for regulating the printing wire position. The armature 2 installed in the magnetic gap is normally attracted to the pole 8 by the magnetic field of a permanent magnet (not shown). At this time, the driving leaf spring 1 is in a bent state and has accumulated elastic energy, and in response to the print signal, current is passed through the degaussing coil 9 wound around the outer circumference of the bolt 8 in a direction that cancels out the magnetic field of the permanent magnet. As a result, the attractive force of the permanent magnet is canceled out, and the elastic energy of the driving plate spring 1 is released, so that the printing wire 3 protrudes to the upper surface of the wire guide 7. At this time, the ink on the ink ribbon (not shown) is transferred to the printing paper by the impact of the printing wire, and color is formed in dots.

Next, when the current to the degaussing coil 9 is cut off, the shear matinia 2 is attracted again by the attractive force of the permanent magnet, and the printing wire 3 is returned to its original position. With the above operations, one dot cycle is completed.

The configuration and operating principle of the conventional dot printer print head have been described above. The print wire 3 attached to the print wire movable part is inserted into a plurality of holes 7a provided in the wire guide 7, respectively, as shown in FIG. printing wire 3
is inserted. Therefore, the printing wire 3 attached to the tip of the lever 4 is inserted into the holes 6a and 7a of the intermediate guide 6 and wire guide 7 with high accuracy and with minimal frictional resistance, so that the printing wire 3 can operate smoothly. Therefore, it is necessary to attach it to the lever 4 with high precision. Therefore, as shown in the side view of the movable part of the printing wire in FIG. 3(a), the printing wire 3 is generally attached at a predetermined angle .theta. with respect to the driving direction of the lever 4. Further, as shown in the front view of the movable part of the printing wire in FIG. 3(b), the printing wire 3 is attached perpendicularly to the armature 2 and the lever 4, that is, so as not to tilt left or right with respect to the driving direction. ing.

Therefore, in the conventional installation of the printing wire 3 and lever 4, a printing wire installation jig 1o is used as shown in FIG. However, there was a problem in that it had to be attached using a special method.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and makes it possible to accurately attach the print wire and lever of a movable device for a dot printer print head to the lever without using an attachment jig. The object of the present invention is to provide a movable device for a dot printer print head.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides the following methods for attaching the lever of the printing wire movable part and the printing wire. A protrusion for fixing the printing wire is provided on the back of the lever, which can adjust and regulate the installation angle of the printing wire and the length of the printing wire, and the printing wire is attached to the lever by means such as brazing. By removing the protrusion on the lever, the installation angle and length of the printing wire can be regulated. This makes it possible to attach the printing wire with high precision without using a jig. , production costs can be reduced.

DESCRIPTION OF EMBODIMENTS A movable device for a dot printer print head according to an embodiment of the present invention will be described below with reference to FIGS. 5 and 6. Incidentally, the same members as those in FIG. 3 are given the same numbers and their explanations will be omitted.

In FIGS. 5 and 6, 11 is a lever for moving the printing wheel, and 11a is a printing wire 3 provided on the back of the lever 11.
11b is a protruding member for regulating the length t of the printing wire 3.

In this case, the shape of the protruding member 11a provided on the back surface of the lever 11 is such that when the printing wire 3 is attached, the printing wire attachment angle θ is such that the printing wire 3 is placed between the tip of the lever 11 and the regulating surface 11c of the protruding member 11a. By doing so, the shape of the protruding member 11b is set such that the mounting angle θ and the perpendicularity to the lever 11 can be automatically obtained with high precision. The protruding member 11a is further provided with an L-shaped protruding member so that the length L can be easily regulated.

When the printing wire 3 is attached using the lever 11 for the printing wire movable part of the present embodiment configured as described above, the printing wire 3 It is possible to set the installation angle θ and the length t of the printing wire 3 with high accuracy without using a jig, and after attaching the printing wire 3 to the tip of the lever 11 using a method such as brazing, the above-mentioned The protruding members 11a and 11b provided on the lever 11
By cutting at the joint A (dotted line) between the projection member 11a and the projection member 11a, it is possible to easily create a movable device for a dot printer print head with high precision, thereby reducing production costs. It is.

Effects of the Invention As described above, the present invention provides the lever with a projection member that regulates the attachment angle and length of the printing wire.
The printing wire can be attached with high precision in the attachment angle and length without using a jig, and the production cost can be reduced, which is extremely effective.

[Brief explanation of the drawing]

FIG. 1 is a simplified structural sectional view of a conventional print head movable device for a dot printer, and FIGS. 2 and 3 (a). (b) is a configuration diagram of the main parts, FIG. 4 is a sectional view of the main parts showing a conventional method for attaching the movable part, and FIG. 5 is a side view of the main parts of the movable device for a dot printer print head in an embodiment of the present invention. ,
FIG. 6 is a side view of essential parts in another embodiment. 3... Printing wire, 11... Lever, 1
1a. 11b...Protrusion member. Figure 1 Figure 2 Figure 3 (αn (, f)
2Figure 4

Claims (1)

[Claims] A printing wire movable part having an armature and a drive leaf spring, and a lever provided at one end of the printing wire movable part, the lever having at least a mounting angle of the printing wire or a length of the printing wire. A movable device for a dot printer print head, which has a projection for fixing a printing wire that regulates one of the levers, the printing wire is attached to the lever by means such as brazing, and the projection is removed. .