JPS60198245A - Typewriter - Google Patents

Abstract

PURPOSE:To enable printing by mounting plural kinds of petal shaped type wheels same in character arrangement but respectively having different radii, by making the drive shafts of the petal shaped type wheels movable in an up-and- down direction. CONSTITUTION:A motor 7, which pivotally supports petal shaped type wheels 5 and receives rotary driving corresponding to the selection of a character, is made movable by a movement amount alpha in an up-and-down direction by wheel solenoids. By this mechanism, for example, even a type wheel, of which the type is large and the radius is made long in order to prolong the distance between types, is mounted to enable printing.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a typewriter that prints by installing a petal-shaped type wheel, and in particular, a typewriter that prints by installing a petal-shaped type wheel, and in particular, a typewriter that uses a plurality of types of petal-type type wheels with the same character arrangement and different radii. It can be used interchangeably.

[Prior Art] In general, typewriters equipped with a petal-shaped type wheel, that is, a so-called decimal wheel, have become rapidly popular in recent years because they allow the font and pitch of the printed characters to be arbitrarily selected. ing. However, especially when it comes to large type, it is greatly constrained by the radius of the decile wheel itself and the number of characters, so with the recent increasing trend of using large type such as pre-gates, the radius of the decie wheel also tends to increase. It is in. However, the problem was that the large radius decimal wheel was not suitable for small type.

[Objective] The object of the present invention is to solve the above-mentioned conventional problems, and to provide a type that makes it possible to use both a large-radius decimal wheel arranged with large print type and a small-radius decimal wheel arranged with small print type. The goal is to provide writers.

Another object of the present invention is to attach the type wheel so that the position of the driving shaft can be moved up and down.
As long as the character arrangement is the same, any type wheel can be attached and used regardless of the size of the radius, making it possible to use a type wheel with a radius that matches the size of the type. The purpose is to provide typewriters.

[Example] The present invention will be described in detail below by way of example with reference to the drawings.

First, FIG. 1 shows the appearance of an electronic typewriter to which the present invention is applied. In the illustrated electronic typewriter, by operating keys arranged on a keyboard 1, characters arranged on a type wheel mounted on a carriage 2, that is, a decimal wheel 5, are printed from the back side by a printing hammer 6 via a printing ink ribbon. The impact is applied, and printing is performed on the printing paper 4 on the platen 3.

FIG. 2 shows a side view of the carriage 2 in the electronic typewriter having the configuration shown in FIG. Big Decy wheel 11
Fig. 3 shows the case where .

In the figure, the wheel motor 7 is movable in the vertical direction by a movement amount α by the wheel solenoid 10, and therefore faces the carriage 2 so as to be movable in the vertical direction. Further, a barcode reader 8 is fixed to the lower part of the wheel motor 7.

On the back side of the type wheel 5 or 11 facing the barcode reader 8, as shown in FIG. It is.

FIG. 5 shows an example of the configuration of a circuit device for controlling the operation of each part of an electronic typewriter having such a configuration.

In the illustrated configuration, a multiplex unit (M
PU), 13 and read-only memory (ROM) 1
8゜Random Access Memory (RAM) 15. Interface logic circuit 17. The keyboard 14 and the like are connected by a common data bus 24, and microinstructions and data can be exchanged with each other by referring to an address bus 22 and a write/read line (R/W) 23. It is.

With this configuration, read only memory (ROM) 16
or according to preprogrammed microinstruction instructions in random access memory (RAM) 15, multiplex unit (MPU) 1
3 performs calculation control sequentially.

The keyboard 14 is connected to a multiplex unit (MPU) 13 when a key is pressed and an interrupt signal is sent.
It outputs microcoded key information necessary for the above-mentioned programmed interrupt processing.

The interface logic circuit 17 converts the coded serial signal sent from the barcode reader 8 into a parallel signal and sends it to the multiplex unit (MPU) 43 via the data bus 24. The drive control circuit 1 receives and latches drive information regarding various printing devices via the data bus 24.
Hand it over to 8.

In the drive control circuit 18, the received drive information is sent to various printing devices 21 or wheel shift solenoid 2.
Amplify to a level that can drive 0.

Now, the radius from the wheel rotation center W of the small radius wheel 5 in FIG. 2 to the type center 0' is defined as r, and the wheel rotation center W of the large radius wheel 11 in FIG.
Let R be the radius from 0' to the type center 0', and let the shift amount α of the wheel shift solenoid 10 be α=R−r.
and set.

In the case where the 19 ru ＾ 礒, t 1 de 7 ri 1 Ij to, 1, ningi Since the position of the type center 0' does not change, the distance from the carriage base to the type center 0' is constant.

In such a state, first, consider the case where the small radius wheel 5 is mounted on the carriage.The wheel shift solenoid 10 is energized and the wheel center moves upward by the movement amount α, and then the wheel center W and the type center 0 are changed. The distance between the two wheels becomes the wheel radius r, and printing becomes possible.

On the other hand, when the large radius wheel 11 is attached to the cal lunge, the wheel shift solenoid 10 is not energized and the distance between the wheel center W' and the type center D' becomes the wheel radius R. Printing becomes possible.

Therefore, as an initial operation, the type wheels 5.degree. 11 are rotated, and the bar code reader 8 reads the radius information of the type wheels 5, 11 and the pitch information of the type arrangement, which are recorded in advance. When the read wheel radius information indicates a small radius wheel 5, the wheel shift solenoid 10 is energized so that the distance between the wheel center W and the type center 0' becomes the radius r. On the other hand, if the read wheel radius information is the large radius wheel 11, the wheel shift solenoid 10 is not energized and the distance between the wheel center W' and the type center 0' becomes the radius R. so that it can be printed in either case. Therefore, if the character arrangement on the decimal wheel is the same, printing is possible regardless of the size of the wheel radius.

[Effects] As is clear from the above explanation, according to the present invention, as long as the character arrangement is the same, it is possible to print by attaching decimal wheels with different radii to the carriage of a typewriter. A decimal wheel with a radius of can be used arbitrarily by moving the center of the wheel up and down.

[Brief explanation of drawings]

Figure 1 is a perspective view showing the external appearance of an electronic typewriter. Figure 2 is a side view showing the detailed configuration of the carriage when a small radius decile wheel is installed. Figure 3 is a view when a large radius decie wheel is installed. FIG. 4 is a front view showing the arrangement of the rear surface of the dicee wheel, and FIG. 5 is a block diagram showing the structure of the control circuit device of the typewriter of the present invention. DESCRIPTION OF SYMBOLS 1... Keyboard, 2... Carriage, 3... Platen, 4... Print paper, 5... Small radius type wheel, 6... Hammer unit, 8... Barcode reader, 9...・Barcode seal, 10... Wheel shift solenoid, 11... Large radius type wheel, 12... Barcode, 13... Multiflex φ unit, 14...
Keyboard, 15...Random access memory (RAM), 18.
...Read-only memory (ROM), 17...Interface logic circuit, 18...Barcode reader, 18...Printing device drive control circuit, 20...Wheel shift-solenoid, 21...Printer drive 22...Address bus, 23...Read/write line, 24...Data bus. 4. Applicant: Canon Co., Ltd. Figure 1

Claims (1)

[Claims] In a typewriter that prints by installing a petal type type wheel, by making the drive shaft of the type wheel movable in the vertical direction, it is possible to print multiple types of characters with the same character arrangement but different radii. A typewriter characterized by being equipped with petal-shaped type wheels for printing. (Margin below)