JPH0535286U - Print wires and print wire assemblies - Google Patents

Abstract

(57) [Summary] [Purpose] The print wire and armature are securely connected to extend the service life. [Structure] The printing wire is formed by integrally forming one end of a wire main body with a wire joining portion bent substantially at a right angle. Further, the wire joining portion of the print wire and the side surface of the armature are joined to form a print wire assembly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a print wire and a print wire assembly for a free-end serial dot printer, and more particularly, to a print wire and a print wire assembly in which the print wire and the armature are well coupled with each other.

[0002]

[Prior Art]

 Generally, a print wire assembly of a free-end serial dot printer is composed of an armature 14 and a print wire 15, as shown in FIG. The armature 14 is composed of an armature body 16 that is attracted and separated by an electromagnet (not shown), and a print wire attachment portion 17 formed of a thin plate member. The armature body 16 has a groove formed at the tip of the armature body 16. It is formed by fitting the lower end of the print wire attachment portion 17 to the reference numeral 18. Then, one end of the print wire 15 is arranged on the top surface of the upper end of the print wire attachment portion 17 of the armature 14 and joined by brazing to form a print wire assembly 19.

The print wire assembly 19 is incorporated in the printer to form a print mechanism as shown in FIG. 4 for printing. The printing mechanism shown in FIG. 4 is a so-called clapper type, and when the armature 14 is attracted toward the core 21 excited by the electromagnetic coil 20, the printing wire 15 bonded to the armature 14 moves toward the platen 22. Then, the platen 22 is hit through the ink ribbon 23 and the paper 24 to print on the paper 24.

However, in the above-mentioned conventional printing wire assembly 19, it is difficult to uniformly apply the brazing material to the joining portion when joining the printing wire 15 and the printing wire attaching portion 17. Therefore, the bonding strength is poor, and the printing wire 15 may come off from the armature 14 during use.

In order to solve the above-mentioned problems, a printing wire arranging groove is provided on the top surface of the upper end of the armature, and the sticking property is improved by increasing the diameter of the end portion of the printing wire for joining with the armature. Attempts have been made to do so.

[0006]

[Problems to be solved by the device]

 However, even with the printing wire improved as described above and joined with a sufficient brazing material to increase the joining strength, the printing wire sometimes separated from the joining portion with the armature during use.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and provides a printing wire and a printing wire assembly capable of reliably connecting the printing wire and the armature and extending the service life. The purpose is to provide.

[0008]

[Means for Solving the Problems]

 The inventors of the present invention have conducted extensive studies to achieve the above-mentioned object, and even if the print wire assembly is joined with a sufficient brazing material, the print wire is separated from the armature during use. We found that the location was not appropriate. That is, since the load due to impact is repeatedly applied to the print wire in the axial direction during use, the print wire is easily peeled off at the joint between the print wire and the armature in the conventional print wire assembly, which is not suitable. is there. Based on the above findings, the inventors of the present invention have completed the present invention by searching for a more suitable joining portion and by searching for a printing wire suitable for joining.

That is, the print wire of the present invention integrally comprises a wire joint portion bent substantially at a right angle at one end of the wire body, and the print wire assembly of the present invention is connected to the wire joint portion of the print wire. , The side of the armature is joined.

[0010]

[Action]

 In the print wire and the print wire assembly of the present invention configured as described above, the joint surface is vertical to the wire body even if a load due to impact is applied to the print wire during use, and Since the armature has a side surface in the axial extension direction of the wire body, peeling and separation of the printing wire can be prevented, and the bonding strength is enhanced.

[0011]

【Example】

 An embodiment of the present invention will be specifically described below with reference to the drawings. Using a high carbon steel wire (110C material) having hardness Hv700, wire diameter 0.20 mm, and length 40 mm, the one end 5 mm is bent almost at right angles to the wire body 2 to form the wire joining portion 3, A printing wire 1 as shown in FIG. 1 was obtained. In the figure, 4 is a bent portion. Next, the armature 5 was constructed by joining the armature main body 7 and the printing wire attachment portion 6 made of 1% silicon steel and having a width of 3.0 mm and a thickness of 0.5 mm. Then, the wire joining portion 3 of the printing wire 1 is brought into contact with the side surface 6a of the printing wire attaching portion 6, and the wire joining portion 3 is brazed up to 2 mm from the end thereof with the silver solder 8, The print wire assembly 9 as shown in FIG.

By the way, in the above-mentioned embodiment, the wire joining portion 3 is made to have a length longer than the joining length, and only the end portion of the wire joining portion 3 is brazed and joined. Without doing so, the durability of the print wire and the print wire assembly can be further improved.

Further, although high carbon steel (110C material) is used for the printing wire in the above embodiment, the present invention is not limited to this, and for example, piano wire, cobalt alloy steel, high speed steel, etc. can be used. Further, although 1% silicon steel is used for the armature, permenome alloy, grain steel or pure iron may be used.

[0014]

[Effect of the device]

 The present invention ensures that the print wire and the armature are securely connected and has excellent bond strength, so the print wire does not easily come off from the armature during use, and the heat deterioration of the print wire due to brazing heat does not occur. It has practical effects, such as prevention and prolongation of service life.

[Brief description of drawings]

FIG. 1 is a schematic view showing an embodiment of a printing wire of the present invention.

FIG. 2 is a cross-sectional view of an essential part showing an embodiment of a print wire assembly of the present invention.

FIG. 3 is a perspective view showing a conventional print wire assembly.

FIG. 4 is a schematic configuration diagram showing a printing mechanism of a dot printer.

[Explanation of symbols]

 1 Print Wire 2 Wire Body 3 Wire Joint 4 Bend 5 Armature 6 Wire Attachment 6a Side 7 Armature Body 8 Silver Solder 9 Print Wire Assembly

Claims (2)

[Scope of utility model registration request] 1. A printing wire comprising a wire main body integrally formed at one end thereof with a wire joint portion bent substantially at a right angle. 2. A printing wire assembly formed by joining a wire joining portion of the printing wire according to claim 1 and a side surface of an armature.