JPS62267152A - Wire head guide of dot printer - Google Patents

Abstract

PURPOSE:To enhance durability and to reduce cost by a reducing abrasion, by integrally forming guides reaching a drive source side from the leading end parts of wire heads through the intermediate parts thereof, and forming the bearing of said wire heads so as to have oblique holes along the axial direction of each wire head. CONSTITUTION:Because the wire heads 5 of a dot printer are arranged in a row in a platen side but arranged on the same circumference of a circle in a coil side, said heads are arranged obliquely with respect to the axis of a platen. Therefore, the bearing part provided at the leading end part 2 of wire head guide, the bearing part at the intermediate part 4 thereof and the bearing of the wire heads in the coil side are molded so as to have oblique holes along the wire heads 5. The wire head guide reaching the rear end guide from the leading end guide through the intermediate guide is constituted with one part. Therefore, the bearing part is reduced in abrasion and has durability and, further, because the wire head guide can be formed as one part by injection molding, the cost reduction of the apparatus can be achieved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application] This invention relates to the structure of the wire head guide #cm of the #48μ dot printer of the present invention.

[Conventional technology]

The structure of the wire head guide device of a conventional dot printer is shown at 411 in M2LQ, and the guide at the tip of the wire head guide device has a tip guide portion a11. Tip guide part b12. The tip guide part 13 and 5 parts are separated into 9,
In addition, Vc, bearing fBa 15 is a hole perpendicular to the axis of the platen, so the position of the bearing part 1i - rc
He served as a guide for Yohawire Head 8.

'! 7c, the middle part of the wire head guide device is fitted into the nose 17 and the middle part L7 is shown in the middle guide part 14,
There is a large hole in the platen 1 in the bearing part 414, and it is exposed from a plurality of parts.

[Problem that the invention attempts to solve]

However, the wire head guide device described above requires five parts for the guide at the tip, and several parts for the guide from the middle part to the end, so there are many S parts. In addition, the guide portion of the wire head 5 which is arranged diagonally has an edge 18 of the bearing portion as shown in the bearing portion c15 and the bearing portion d.
1 is a practical guide. Therefore, when the wire head 5 reciprocates at a local speed, the edge 18 of the bearing 5cL wears out, which increases the play between the wire head 5 and the wire head guide, resulting in poor print alignment. Part. In order to reduce the durability of the wire head guide device, it may be replaced with a vc1 ceramic or the like, but the wire head guide device is extremely thin and the wire head 5 is shaved and thin.

The problem was that the printing quality deteriorated.

Therefore, the present invention aims to solve these problems.
The purpose of this is to make the wire head guide durable with little wear, not to cause wear to the mating wire head 5', and to reduce the number of parts for wire head guides, and to create a low-cost wire head guide. There are many things to offer.

[Means to resolve the dispute]

In the wire head guide device of the dot printer of the present invention, each one end of a plurality of wire heads 5 is arranged in one row or in a plurality of rows to face the platen 1, and each other end of each wire head 5 is arranged on the same circle or in a plurality of rows. The guide of the wire head 5 of the dot printer, which is arranged in a concentric field and engaged with the main WIJJ source, has the following configuration t% characteristics.

(e) In the guide device that guides the wire head 5t, the bearing at the tip y#A section 2 of the wire head guide facing the platen 1, the bearing at the drive source side guide, and the bearing at the intermediate section 4 of the wire head guide are connected to the wire head. 5
The hole should be diagonal along the axial direction.

(b) A wire head guide for a dot printer in which the wire head guides from the tip s2 of the wire head guide to the middle part 4'gt of the wire head guide to the guide on the drive source side are made in one piece.

〔Example〕

Figure m1 is a plan view of a wire head guide of a dot printer in an actual yIM example of the present invention. 1 is a platen, which is a receiving surface of the wire head 5 during printing. 2
is the tip of the wire head guide, and the printing quality is determined by the position of the guide hole and the N degree VC of the hole diameter. 5 is a nose, which is a frame to which the wire head 5, coil, and wire head guide are attached. 4 is the middle part of the wire head guide. 5 is a wire head that makes a reciprocating motion in one axis direction and prints. Further, each wire head is arranged diagonally with respect to the platen 1. Reference numeral 6 denotes a bearing forming a diagonal 8 along the wire head 5 at the tip portion 2 of the wire head at the bearing portion a. This is a bearing in which the bearing sb of No. 7 is formed diagonally along the wire head 5 located in the middle of the wire head guide @4. Dowel pin 8 is shown in Figure 6, and is a part of the wire head guide.1 Nose 6 and the wire head guide are positioned, and the knock pin 8 is swaged to connect the wire head guide t nose 6.
I am firmly convinced.

Place the platen on the wire head 5 of the dot printer.
Since the coils are arranged in rows and arranged on the same circumference, they are arranged diagonally with respect to the platen axis. Therefore, the bearing part a at the tip s2 of the wire head guide, the bearing part a at the wire head kite intermediate part 4, and the bearing of the wire head on the coil side are connected to the wire head 5.
The wire head guide is molded into a hole.The wire head guide, which extends from the tip guide to the rear guide via the intermediate guide, is made of one part.

An ink ribbon and printing paper (ZfHS product, not shown) are interposed between the tip 2 of the wire head guide and the platen 10, and the ink ribbon moves in the axial direction of the platen 1, and the printing paper moves in the axial direction of the platen 1. Move vertically. Therefore, when the wire head 5 moves back and forth and prints on paper, the wire head 5 simply catches the ink ribbon, and the wire head guide VC radial load is applied to the wire head 5.
Tamekaru.

Therefore, the bearing portion a6f'l wire head 5 receives the reciprocating motion at a still speed and the radial load motion at the same time. However, since the bearing portion a6 receives the entire load of the wire head 5, there is less wear and durability. Furthermore, the bearing S near the bearing section and the coil also has less wear on the stubble and is durable. This means that the print quality of the matrix produced by the reciprocating movement of the wire head 5 is maintained over a long period of time.

〔Effect of the invention〕

As mentioned above, according to the 100-point guide, the bearing part of the wire head guide of a dot printer is durable with little wear and maintains long-term printing quality, which improves the performance of the wire head device of a dot printer. t brought. Furthermore, since the wire head guide can be manufactured as a single part by injection molding, the number of parts for the wire head guide part is reduced, and the number of assembly steps is reduced, so the cost of the wire head device can be reduced. Has 1.

[Brief explanation of drawings]

FIG. 1 is a plan view of a wire head guide device for a dot printer according to the present invention. FIG. 2: A plan view of a wire head kite device for a conventional dot printer. Fig. 6: Elevation view of the wire head kite device for a dot printer according to the present invention - 0 1 River: Platen 2: Tip portion 5 of the wire head guide
...Nose 4...Middle part 5 of the wire head guide...
...Wire head guide 6...Bearing ga 7...Bearing part b 8...Knock bottle 11...Tip guide part a 12...・Tip guide tmb 15...Tip guide part 0 14...Middle kite capital 15...Bearing part 0 16...Bearing part d 17... ...Nose 18...Above the edge of the bearing part

Claims (1)

[Scope of Claims] One end of each of the plurality of wire heads is arranged in one or more rows to face the platen, and the other ends of the wire heads are arranged on the same circle or on concentric circles and are connected to a drive source. A wire head guide for a dot printer, wherein the guide for the wire head of the dot printer engaged with the wire head has the following configuration. (a) A bearing at the tip of the wire head that guides the wire head facing the platen, a bearing at the rear end that guides the wire head on the drive source side, and a plurality of bearings that guide the intermediate part of the wire head. It has a diagonal hole shape along the axial direction. (b) The bearing section of the wire head from the tip end to the rear end is made of an integral part.