JPH0436863B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to the structure of a head for a wire type dot printer, and more particularly to a positioning and mounting device for a wire guide member.

[Prior art]

Although the wire guide plate attached to the tip of the wire nose of a wire dot printer is required to be positioned and fixed accurately, it is an extremely small member, so even if there is an error in the dimensions within the tolerance range, it is difficult to assemble them. This difference will have a large effect on the attachment, causing problems such as not being able to position it correctly, or even falling off.

〔the purpose〕

The present invention has been made in view of these problems, and its purpose is to provide a simple device that can accurately position and securely fix a wire guide member. .

[Means for Solving the Problems] A head for a wire-type dot printer according to the present invention includes a nose portion provided with a guide groove in a direction perpendicular to the operating direction of the print wire near the tip, and a nose portion that guides the tip portion of the print wire. A wire guide member is provided with a plurality of holes and has minute protrusions formed on the side surface facing the guide groove and is inserted and fixed into the guide groove, and the wire guide member is inserted and fixed into the guide groove. The bottom surface on the tip side of the nose portion constituting the wire guide member protrudes in the insertion direction, and the bottom surface is opened toward the insertion direction of the wire guide member.

[Examples] The details of the present invention will be explained below based on illustrated embodiments.

The drawing shows an embodiment of the present invention applied to a wire guide member of a wire-type dot printer.
The nose of a wire-type dot printer as shown in Publication No. 35475, etc., is provided with several stages of guide plates 2, 2 for sequentially aligning a large number of print wires driven by an electromagnetic drive mechanism. ,
Moreover, guide grooves 3, 3 for mounting a wire guide member 4, which will be described later, from one side are recessed on the inner surface of the lower end.

Reference numeral 4 denotes a wire guide member that is a characteristic part of the present invention. It is composed of three layers, consisting of a sole plate 5 and a presser plate 7 made of resin or the like, which is held on top of the sole plate 5. Further, on both sides of this sole plate 5, there are small approximately conical projections 8, 8. is integrally formed to protrude, and the above-mentioned guide groove 3
It is configured to make contact with the bottom surface of the Also,
As seen in FIG. 1, the bottom and both side surfaces constituting the guide groove 3 protrude in the direction in which the wire guide member 4 is inserted, and the bottom has an opening facing in the direction in which the wire guide member 4 is inserted. is provided.

In addition, the symbols 5a, 6a, and 7a in the figure indicate each plate 5,
Wire guide holes are drilled on the 6th and 7th sides, and 5b indicates dowels provided on the sole plate 5, respectively.

Therefore, when this wire guide member 4 consisting of the sole plate 5, the ceramic plate 6, and the presser plate 7 is inserted into the groove 3 provided at the lower end of the nose portion 1 from one side, the wire guide member 4 is inserted into the groove 3 provided at the lower end of the nose portion 1 from one side. The protrusion 8 provided is the second
As shown in the figure, the guide groove 3 is bent rearward in the insertion direction between the guide groove 3 and the sole plate 5, and the sole plate 5 and the guide groove 3 are bent backward in the insertion direction.
At the same time, the wedge action prevents the wire guide 4 from falling off. Furthermore, the bottom and both side surfaces constituting the guide groove 3 protrude in the direction in which the wire guide member 4 is inserted, and when setting the wire guide member in the guide groove 3, the tip of the wire guide member 4 should be Just place it on the overhanging part and then push it in the direction of the groove.

[Effects of the Invention] According to the present invention, the bottom surface on the tip side of the nose portion constituting the guide groove of the wire guide member projects in the insertion direction, and the bottom surface has an opening in the insertion direction of the wire guide member. The wire guide member can be fixed to the nose section by simply placing the tip of the wire guide member on this overhanging part and pushing it in the direction of the groove.The wire guide guides the tip of the printed wire. The work of installing components has become extremely easy and reliable.

In addition, since the bottom of the groove is open in the insertion direction of the guide member, the surface of the wire guide member is exposed to the ink ribbon, and the print wire can be guided closer to the ink ribbon.
The printed wire can be guided with high positional accuracy.

Furthermore, the side surface of the wire guide member facing the guide groove is formed with a minute protrusion that comes into contact with the guide groove, so that even if there is some gap between the guide groove and the wire guide member, this protrusion will not be crushed. The wire guide member can be positioned accurately by filling the lever gap, and the wedge effect caused by the deformation of the protrusion that occurs when inserting the wire guide member allows the wire guide member to be positioned at the tip of the nose member without using other fixing members. It can be firmly attached to.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a device showing an embodiment of the present invention, and FIG. 2 is a bottom view showing a state in which a wire guide member is attached. DESCRIPTION OF SYMBOLS 1...Nose part, 3...Guide groove, 4...Wire guide member, 5...Sole plate, 8...Substantially conical projection.

Claims (1)

[Scope of Claims] 1. A head for a wire-type dot printer that prints by hitting printing paper with an ink ribbon at the tip of a print wire, comprising: a guide groove extending in a direction perpendicular to the direction of movement of the print wire near the tip; A plurality of holes are provided for guiding the tip of the printed wire, and a small protrusion that contacts the guide groove is formed on a side surface facing the guide groove, and the printed wire is inserted into the guide groove and fixed. a wire guide member, the bottom surface of the nose portion distal end side forming the guide groove of the wire guide member protrudes in the insertion direction, and the bottom surface is opened toward the insertion direction of the wire guide member. A head for a wire-type dot printer characterized by: