JPH01110162A - Armature assembly - Google Patents

Abstract

PURPOSE:To achieve easy working and improvement of fixing strength of a wire by a method wherein in an armature assembly of a dot printer head, a brazing part for fixing a dot wire at a top of an armature by brazing is formed in a stepped state capable of holding the dot wire. CONSTITUTION:A stepped brazing part 4 for fixing a dot wire 1 is formed at a top 2a of an armature 2. This brazing part 4 can be simply formed at a low cost by punching working or the like. When the dot wire 1 is fixed to the armature 2, an end part of the dot wire 1 is supported with the brazing part 4 of the armature 2, and is fixed by brazing from thereon with a brazing filler metal 3. By fixing via the brazing part 4 in this manner, a contact area of the armature 2 and the dot wire 1 becomes larger and their fixing strength can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an armature assembly for fixing a dot wire to the tip of a dot print head, and particularly to an armature assembly that can increase the strength of fixing the dot wire.

[Prior Art] A conventional dot print head is composed of a core, a magnet, a coil, an armature assembly in which a dot wire is fixed to the armature, etc., and the dot wire is struck by the movement of the armature to perform printing.

In this conventional dot print head, when fixing the dot wire to the armature of the armature assembly, a hole 12 is made near the tip of the armature 11 as shown in FIG. 4, and the tip of the dot wire is inserted into this hole 12 and fixed. Or armature 1 as shown in Figure 3.
A flat surface 11a was formed at one tip, and the end of the dot wire 13 was fixed to this flat surface 11a by brazing.

[Problems to be Solved by the Invention] In the conventional armature assembly described above, in which the dot wire is inserted and fixed into the hole 12 of the armature 11 as shown in FIG. The disadvantages are that the machining work is difficult and the parts machining cost is high.

Further, in the case where the dot wire 13 is brazed and fixed to the flat surface 11a of the armature 11 shown in FIG. 3, the contact area between the flat surface 11a and the dot wire 13 is small, so sufficient strength cannot be obtained, and the dot wire There was a drawback that peeling occurred and printing of stable quality was not possible.

[Means for Solving the Problems] The present invention has been made in order to solve the above-mentioned conventional problems and provide an armature assembly that is easy to process and can improve the fixing strength of dot wires. In order to achieve this object, in the armature assembly of the dot print head, the brazed portion at the tip of the armature to which the dot wire is brazed and fixed is formed in a stepped shape capable of holding the dot wire.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a partial perspective view of an embodiment of the present invention, and FIG. 2 is a partial perspective view of the armature tip.

In the figure, the armature assembly of this embodiment is
It is constructed by brazing and fixing a dot wire 1 to the tip of an armature 2 with a brazing agent 3.

A plurality of the armatures 2 are provided in the dot print head, and are operated by the action of cores, magnets, coils, etc. (not shown), and perform printing by hitting the dot wire 1 onto the print paper via an ink ribbon.

A dot wire 1 is attached to the tip 2a of the armature 2.
A stepped brazed portion 4 for fixing is formed. As shown in the figure, this brazed portion 4 is formed by notching a portion of the tip 2a of the armature 2 at a substantially right angle, and has a size that allows the dot wire 1 to be held stably. Note that this brazed portion 4 can be formed easily and inexpensively by punching or the like.

When the dot wire 1 is to be fixed to the armature 2, the end of the dot wire 1 is held in the brazing part 4 of the armature 2, and the brazing agent 3 is applied onto it to fix it. By fixing through the brazed portion 4, the contact area between the armature 2 and the dot wire 1 becomes large, and the fixing strength can be improved. Further, since the contact area is large, heating during brazing can be reduced, and the thermal influence on the dot wire 1 can be reduced.

Note that the shape of the brazed portion 4 formed on the armature 2 is not limited to that of the above embodiment, and may be any shape as long as it has a groove shape that can hold the dot wire 1.

[Effects of the Invention] As explained above, according to the present invention, in the armature assembly of the dot print head, the brazed portion at the tip of the armature to which the dot wire is brazed and fixed is formed into a stepped shape capable of holding the dot wire. By forming the dot wire, the contact area between the dot wire and the armature brazing portion becomes larger, and the brazing strength can be improved. Further, since the armature row attachment portion can be processed by punching or the like, processing is inexpensive and easy. Since the contact area can be increased and the heating required during brazing work can be reduced, there is an effect that the thermal influence on the dot wire can also be reduced.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view of the armature assembly of the present invention, FIG. 2 is a partial view of the armature, and FIGS. 3 and 4 are schematic views of conventional armature assemblies. 1: Dot wire 2: Armature 2a: Tip part 3: Brazing agent 4: Brazing part

Claims (1)

[Claims] An armature assembly for a dot print head, characterized in that a brazed portion at the tip of the armature to which a dot wire is brazed and fixed is formed in a stepped shape capable of holding the dot wire.