JPS59198167A - Dot printer - Google Patents

Abstract

PURPOSE:To obtain the dot printer capable of printing both straight letter and inclined letter, by a method wherein the arrangement of needle in a life is made possible to be inclined on a straight line by inclining the dot printer head assembled material to the carriage traveling parallel to the pattern. CONSTITUTION:The pivotting operation part 14 of extruded piece state is formed at the upper part of pivotting member 12 by stationarily attaching the pivotting member 12 having fan-shaped gear 11 to the case 6 of dot printer head 5. When printed by the straight form of a letter, it is printed by making the file arrangement of needles 7 cross at right angles to the longitudinal direction of platen. When the form of letter is inclined like italic letter, the dot printer head assembled material 5 is inclined by holding the pivotting operation part 14, and the holding member 17 is fixed to an optional poisition by engaging it to the teeth of fan-shaped gear 11.

Description

[Detailed description of the invention] Technical field of invention This invention relates to a dot printer.

Technical background of the invention and its problems A dot printer is a device in which a dot printer head, in which a plurality of needles are arranged in columns, is moved in the horizontal direction together with a carrier, and in this process, designated needles impact a platen to print.

If there are 7 needles, generally 7 needles are used as shown in Figure 1.
Printing is performed in a matrix of (columns) x 9 (horizontal columns), but there is a limit to the speed at which the same needle can be operated in response to the movement of the carrier, and the spacing in the horizontal direction of dots made by the same needle is A (2 /9) or more. Figure 1 (-1 is printed with M, and Figure 1 (Machi is printed with l), which will be understood by looking at this figure.

- 10,000, there is a demand for printing in a font similar to italic characters with the same printer, and conventionally the character generator stores the character image formed in a 7 x 9 matrix as shown in Figure 2 (α). , a method is used to call up data from the character generator and print it out as needed.However, because the pitch of the horizontal dots is rough, it is not possible to make the vertical dots slope in a straight line, and as shown in Figure 2 (= The M shown in Figure 1 and the L shown in Figure 2 (to the south) also have strange fonts that are unnaturally slanted.If the horizontal pinch t is made extremely small, the font will be improved, but the carrier feed speed will drop significantly. , cannot meet the demand for high-speed printing on the side bottom.Furthermore, since character images of different fonts must be stored, the memory capacity of the character generator increases, resulting in an increase in cost.

Purpose of the Invention The present invention has been made in view of the above-mentioned points, and it is possible to selectively print straight characters and naturally inclined characters close to beautiful italics. ``The purpose is to scale dot printer heads in order to reduce costs without increasing the number of enemies.

SUMMARY OF THE INVENTION This invention tilts the dot printer head assembly relative to a gear wheel moving parallel to the platen to tilt the array of vertical needles in a straight line, thus creating not only a straight font but also a naturally tilted font as desired. It is possible to print characters that are close to beautiful italics, so there is no need to increase the memory capacity of the character generator, and costs can be reduced.

Embodiment of the Invention A first embodiment of the invention will be described with reference to FIGS. 3 to 6. Carrier shirt installed parallel to the platen (1)) (21F33) A K carrier (4) is slidably held, and a dot printer head assembly (5) is mounted on this carrier (4).This dot printer head assembly (5) U: A rectangular cylindrical needle holding a large number of needles (7) driven by magnets on the front of a case (6) in which a large number of magnets (not shown) are arranged and housed in a ring. A rotating member Q2 having a cylindrical part OI with a square hole (9) formed thereon and a sector-shaped gear aυ to which a guide (8) is attached and which fits into the needle guide (8).
is fixed to the case (6) with screws U4. In addition, a protrusion-shaped rotation operating portion (1) is provided on the upper portion of the rotation member (1) as a means for rotating the dot printer head assembly (5).
14) is formed. On the carrier (4), there is a semicircular receiving part (!:
♀ and this receiving part (generally, a semicircular part 5 that presses down the cylindrical part 0 (1) and screws it, t mat In addition, the slope spring r, b, and ty holding member αη, which serves as a holding means for fixing the dot printer head assembly (5) in the dot position, is connected to the screw Qal.
It is hung on the 9th carrier (4).

Based on this configuration, the vertical arrangement of the needles (7) is perpendicular to the longitudinal direction of the grating (1). If you want to tilt the font like italic characters, hold the rotating operation part (14) and tilt the dot printer head assembly (5) using the holding member H1ka, which engages the teeth of the A-shaped gear (ill). and fix it in any position.

As a result, the arrangement of the needles (7) is inclined at an angle θ with respect to a straight line perpendicular to the longitudinal direction of the platen (1) as shown in Figure 6 (Tsukasa). Even if
(As shown in the figure, both M and L can be printed like beautiful italic letters with a natural slant. Of course, other characters can also be printed as slanted letters in the same way, resulting in a high quality printing. The angle is high, and the tilt angle can be adjusted as desired.

In this way, both straight and tilted fonts can be selectively printed by simply tilting the dot printer head assembly (5), so there is no need to store two types of character images in the character generator, which prevents an increase in memory capacity. Cost reduction can be achieved.

In order to fix the dot printer head assembly (5) in any position, a plurality of teeth that mesh with each other like a spline are formed on the outer periphery of the cylindrical part [alpha] and the receiving surface [alpha] (g) or on the inner surface of the holding plate. , the cylindrical part α0) having these teeth and the receiving surface (l
The holding member may be a heating plate (161) as a holding member, or a screw member for tightening the dot printer head assembly (5) to the carrier (4).

Further, the outer periphery of the needle guide (8) is set in a circular shape and is held rotatably by the receiving surface Q1 and the holding plate u61, and a plurality of In this case, the case (6) may be provided with a rotation operating portion αa, and the second embodiment of the present invention may be implemented by forming teeth. An example will be explained based on FIG. The same parts as in the above-mentioned 'iAi example will be designated by the same reference numerals and their description will be omitted. This example is a dot printer head assembly +
5) 'fr: Step-E-1c2 (
1: It is fixed to the carrier (4).

Therefore, by rotating the snap motor (to), the υ dot printer head assembly (5) can be tilted at a predetermined angle. In this case, it is possible to fix the dot printer head assembly (5) by energizing the step motor (to). If the holding force due to the excitation of the step motor (to) is insufficient, the above embodiment Similarly, the holding member α force is applied to the binion u! '1 is installed in parallel with the fan-shaped gear αυ
It may be meshed with the

Effects of the Invention Since this invention is configured as described above, it is possible to print straight characters or characters such as tilted italic characters by simply tilting the dot printer and the dot assembly as needed. The vertical rows of dots in the characters are aligned in a straight line, which improves the print quality and makes it easier to read.Moreover, there is no need to increase the memory capacity of the character generator.
Therefore, it has effects such as being able to reduce costs.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a straight character image, FIG. 2 is an explanatory diagram showing a conventional tilted character image, FIG. 5 is an exploded perspective view thereof, FIG. 6 is an explanatory view showing an inclined character image, and FIG. 7 is a vertical sectional side view showing a second embodiment of this invention. ■...Platen, 4...Carrier, 5...Dot printer head assembly, 14...Rotating operation section (rotating means), 17...Holding member (holding means), 20...Pulse Motor (rotating means) Fig. 6 ○q] Fig. 5 J5. V J6 J5' JOn,
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Claims (1)

[Claims] 4)? 1' The entire dot printer head assembly is mounted on the rear so as to be able to rotate once with an axis perpendicular to the axis of the platen, and a rotating means for rotating the dot printer head assembly marked 6+J and this dot printer head assembly are provided. A dot printer characterized in that a holding means for fixing at an arbitrary position is biased. 2. A dot printer head assembly is rotatably attached to a carrier that reciprocates along the platen VC with an axis perpendicular to the axis of the platen, a rotating operation portion is coated with gold on the dot printer head assembly, and the dot printer head assembly is coated with a gold film on the carrier. A dot printer characterized in that it is provided with a holding member for fixing the dot printer head assembly at an arbitrary position.