JPH0432281Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a printing device that uses a petal-shaped rotating type wheel (so-called daisy wheel). Related to detachable wheel cassettes.

<Prior Art> A wheel cassette that stores a type wheel and is detachable from a printing device protects the type wheel when replacing the type wheel and prevents the operator from accidentally getting ink on his hands or clothes. This has been proposed in Japanese Unexamined Patent Application Publication No. 120921/1983 for the purpose of preventing this and making replacement work easier.

A petal-shaped type wheel with type on the periphery is housed in this cassette so as to be rotatable within the cassette, and some of the type letters of this type wheel are inserted into windows formed in the upper part of the wheel cassette. It is configured so that you can face it.

Therefore, this wheel cassette is attached to the rotating shaft of the wheel drive motor of the printing device, and then the type wheel is rotated within the cassette by the drive of the wheel drive motor to form desired type on the upper part of the cassette. The printed characters located in the window are placed on the recording medium through an ink ribbon using a hammer means to perform printing.

On the other hand, there are generally three types of printing pitch for typewriters: 10 characters/inch, 12 characters/inch, and 15 characters/inch. One of the three types mentioned above is selected. Furthermore, as shown in FIG. 3, three types of scales are printed on the paper holder 20 and the like arranged along the platen to indicate the printing pitch of the type.

Therefore, the operator sets the print pitch according to the print pitch of the attached type wheel, starts printing, and checks the printing status by looking at the scale.

<Problems that the invention aims to solve> However, there are too many types of scales printed on paper holders, etc., and it is easy to make mistakes.If the printing pitch is incorrectly set to a printing pitch that does not correspond to the printing pitch of the type wheel, and printing is performed. But there was a risk that I would not notice my mistake.

The present invention solves the above-mentioned conventional drawbacks by providing a wheel cassette with a printing pitch scale that corresponds to the printing pitch of the type wheel housed in the wheel cassette, and installing the wheel cassette in a printing device. , corresponds to the wheel cassette attached to the printing device. To provide a wheel cassette which can make the scale easy to see since it only has a scale for print pitch, and can easily notice a mistake in setting a print pitch that does not correspond to the print pitch of a type wheel.

<Means for Solving the Problems> The present invention provides a transparent plate with scales along the printing lines on the top of a wheel cassette in which a type wheel is housed in a housing, and a transparent plate that corresponds to the printing position. It is characterized by having a window in which a predetermined type of the type wheel faces.

<Function> According to the present invention, the wheel cassette is mounted so as to be connected and engaged with the shaft of the wheel drive motor of the printing device, and the type wheel is moved in the wheel cassette so that the desired type is provided on the upper part of the wheel cassette. You can notice errors in the printing pitch setting by rotating the wheel so that it is positioned on the window and printing, and by comparing the printing pitch of the printed characters and the scale provided on the wheel cassette to see if they correspond.

<Embodiment> FIG. 1 shows a wheel cassette showing an embodiment of the present invention. As shown in the figure, 1 is a wheel cassette that houses a petal-shaped type wheel 2 in a housing, and the housing has an opening from which a part of the type wheel 2 housed in the upper part protrudes. The opening is provided with a frame 1b that serves as a handle when the wheel cassette 1 is attached to and removed from the printing device, and a transparent plate 1a with a scale provided in the space within the frame 1b. The transparent plate 1a has a scale corresponding to the printing line of the printing device when the wheel cassette 1 is attached to the printing device, and a window 3 is provided in a portion facing the printing position. Reference numeral 4 denotes a large number of petal-shaped arms provided on the type wheel 2, and 5 designates a number of type letters provided at the tip of the arm 4 and formed in an annular shape at equal pitches.

Figure 2 shows the printing mechanism of the typewriter when the wheel cassette is installed, 6 is the ribbon cartridge that stores the ink ribbon, and 7 is the ribbon cartridge that stores the ink ribbon when the desired type is placed at the predetermined printing position. 8 is a paper holder, 9 is a ribbon guide that guides the ink ribbon to a predetermined position, and 10 is a wheel cassette 1 fixed to a position in front of a type wheel drive motor (not shown). A wheel cassette attachment/detachment button 11 is a paper bail for fixing paper to be printed on along the platen 12.

In the printing mechanism of a typewriter having the above configuration, the wheel cassette 1 held in the front position of the type wheel drive motor is such that the type wheel 2 in the wheel cassette 1 is held in a position in front of the type wheel drive motor. It is configured to be connected in a concatenated manner. For this purpose, the wheel cassette 1 is driven by the motor to rotate the type wheel 2 within the cassette 1 and arrange desired type so as to face the window 3 of the wheel cassette 1. The transparent plate 1a provided with the window 3 is provided with a scale corresponding to the printing pitch of the type wheel 2 housed in the wheel cassette 1. The printed characters 5 placed in the window 3 are attached to the ribbon cartridge 6.
A print hammer 7 stamps a mark on the recording medium via an ink ribbon housed inside, thereby performing printing.

When using a printing device as shown in Figure 2, typewriters are usually equipped with a switch to set the printing pitch, and the pitch settings include 10 characters/inch, 12 characters/inch, and 15 characters/inch. , the desired printing pitch can be set. Therefore, when starting printing, it is necessary to set the pitch according to the printing pitch of the mounted wheel cassette.
For example, when printing at 10 characters/inch, first install the wheel cassette 1 of the present invention for 10 characters/inch, then set the switch for setting the print pitch to 10 characters/inch and start printing. However, at this time, the switch for setting the print pitch was set to 12.
When printing is started after incorrectly setting characters/inch or 15 characters/inch, it is easy to make a mistake because the scale attached to the transparent plate 1a of the wheel cassette 1 does not match the printing pitch of the printed characters. can be noticed.

<Effects> As explained above, according to the present invention, a transparent plate with scales along the printing lines is provided on the upper part of the wheel cassette, and a part of the transparent plate corresponding to the printing position is marked with a predetermined position of the type wheel. The wheel cassette has a printing pitch scale that corresponds to the printing pitch of the type wheel stored in the wheel cassette. Since only the scale corresponding to the print pitch is marked, the scale can be easily seen, and mistakes in setting the print pitch can be easily noticed.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a wheel cassette showing an embodiment of the present invention, and FIG. 2 is a perspective view showing the printing mechanism of a typewriter when the wheel cassette is installed.
FIG. 3 shows a paper holder showing the conventional printing pitch. 1...Wheel cassette, 1a...Transparent plate, 2
...type wheel, 3...window.

Claims (1)

[Scope of utility model registration request] A type wheel is housed in a housing, and the type wheel in the housing is connected and engaged with a shaft of a wheel drive motor of a printing device at a type wheel loading position to rotate the type wheel within the housing and to drive the type wheel in the printing device. On the other hand, the type wheel cassette is a type wheel cassette in which the housing is detachable, and when the wheel cassette is attached to a printing device, a transparent plate is provided on the upper part of the cassette corresponding to a printing line, and a transparent plate is provided with a scale along the printing line. A wheel cassette characterized in that a part of a transparent plate corresponding to a printing position is provided with a window through which predetermined type of a type wheel can be seen.