JPH0133341Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Technical Field of the Invention The present invention relates to a typewriter drive control device, particularly a typewriter movement mechanism, such as a drive control of a typewriter that eliminates bumps during printing digit feeding, paper feeding, etc. It is related to the device.

(B) Technical Background and Problems It is desired to print at high speed while minimizing the removal of bumps when the moving mechanism of a typewriter is moved in the opposite direction.

Conventionally, an operation as shown in FIG. 2 has been performed in order to eliminate bumps in the moving mechanism of a typewriter, such as the moving mechanism for printing digits, paper feeding, etc. This will be explained below.

In FIG. 2, 1 is a keyboard for inputting data, 2 is a keyboard control circuit for detecting data input from the keyboard 1, 4 is a forward movement control circuit for moving the moving mechanism in the forward direction, and 5 is a control circuit for moving the moving mechanism. A backlash removal control circuit that removes backlash; 6 a reverse movement control circuit that moves the moving mechanism in the reverse direction; 7 a moving device such as print digit feed or paper feed; 8 a print control circuit that controls printing; 9 Represents a printing device.

Now, when data is keyed in from the keyboard 1, the keyboard control circuit 2 detects the input data, decodes the detected data signal,
Depending on the decoded contents, a signal is sent to the forward movement control circuit 4, the reverse movement control circuit 6, the printing control circuit 8, etc., and processing according to the input data is performed. For example, when a backspace signal is input as an input signal, the keyboard control circuit 2 sends a signal to the backward movement control circuit 6 to move the printing position, and the backward movement control circuit 6 removes backlash. A signal is sent to the control circuit 5 to remove the backlash, for example, to move an extra character to the left and then move it to a predetermined position. Further, when a print signal is input as an input signal, the keyboard control circuit 2 sends a signal to the print control circuit 8,
After printing by the printing device 9, a signal is sent to the forward movement control circuit to move the printing position by a distance corresponding to one character.

As mentioned above, conventional typewriter control devices perform backlash removal every time movement is controlled in the reverse direction. This resulted in an unnecessary backlash removal operation, which caused problems in high-speed printing.

(C) Purpose and structure of the invention After moving the moving mechanism in the opposite direction, the invention
By performing backlash removal only when it is necessary to remove it, for example when printing, it is possible to cancel the conventional unnecessary operation of removing backlash every time a continuous movement is made in the opposite direction. The purpose is to perform high-speed printing.

FIG. 3 shows a diagram of the principle configuration of the present invention. In the figure, 1 is a keyboard, 2 is a keyboard control circuit,
3 is a set memory which is cleared when a SET signal is set based on backward movement control and forward movement control or backlash removal control is performed; 11 is a decoder; and 12 is a
The SET signal detection section 13 represents an AND logic section.

The present invention has a configuration corresponding to the above-mentioned principle configuration diagram. The typewriter drive control device of the present invention includes a keyboard section for inputting data, a keyboard control circuit for detecting the data input to the keyboard section and sending out a predetermined movement signal or print signal, and a forward direction drive control device for a typewriter. a forward movement control circuit that moves in the forward direction based on a movement signal; a reverse movement control circuit that moves in the reverse direction based on a backward movement signal; and a backlash removal control circuit that removes bumps based on the backward movement signal; A typewriter comprising a print control circuit that prints based on a print signal, and prints in response to data input from the keyboard section, wherein the typewriter is configured to print based on a signal from the reverse direction movement control circuit.
The keyboard control circuit includes a set memory that stores the SET signal and stores the cleared state of the SET signal based on a signal from the forward movement control circuit or the backlash removal control circuit, and the keyboard control circuit stores the input data. a configuration for at least temporarily holding the decoding result when the decoding result is a print signal; a configuration for reading and decoding the stored contents of the set memory when the decoding result is a print signal; a configuration for notifying the print control circuit; and when the SET signal is stored as the storage content of the set memory under a state in which the print signal is held, an AND logic of the two is used;
and at least a configuration for sending a signal to the backlash removal control circuit, and when the backlash removal control circuit receives a signal with the AND logic, the backlash removal control circuit performs backlash removal and sends a signal to the print signal. The printing control circuit, which has received the data, performs printing after the backup has been removed.

(D) Embodiments of the invention The invention will be described in detail below with reference to the drawings.

FIG. 1 shows one embodiment of the present invention. 3 in the figure is a set memory according to the present invention.

In FIG. 1, the set memory 3 stores a SET signal based on a signal from a backward movement control circuit 6, and on the other hand, releases the SET signal based on a signal from a forward movement control circuit 4 or a backlash removal control circuit 5. be remembered.

Now, when a backward movement signal, for example a backspace signal, is input from the keyboard 1 and the keyboard control circuit 2 detects the backspace signal, the keyboard control circuit 2 sends a signal to the backward movement control circuit 6, The reverse movement control circuit 6 sends a signal to the moving device 7 to move the print position one step to the left, and also sends a signal to the set memory 3 to store the set signal. Subsequently, when a backspace signal is input, a similar operation is performed, and the print position is further moved one step to the left, and the SET signal is repeatedly stored in the set memory 3. When the backspace signal is input continuously in this manner, no operation is performed to eliminate the backlash caused by moving the printing mechanism in the opposite direction.

Next, when a print signal is input from the keyboard 1 and the keyboard control circuit 2 detects the print signal, it is determined whether or not the set signal is stored in the set memory 3. If the set signal is stored, the signal is sent to the backlash removal control circuit 5 prior to printing to remove the backlash, and then the signal is sent to the print control circuit 8 to perform printing. Along with this backlash removal, the backlash removal control circuit 5 sends a signal to the set memory 3 to cancel the SET signal.
On the other hand, if the set signal is not stored,
Since there is no need to remove the backlash, a signal is sent to the print control circuit to perform printing.

As explained above, the present invention stores the state in which the reverse direction movement has been performed as a set signal in the set memory 3, and stores the state in the set memory 3 only when the next input signal is necessary to remove backlash. Backlash removal is performed based on the stored SET signal.

(E) Effect of the invention As explained above, according to the invention, in the drive control device of a typewriter, a set signal is memorized when the typewriter is moved in a reverse direction that causes backlash, and the set signal is used based on this set signal. Since backlash removal is performed only when the next input signal needs to be removed, the unnecessary backlash removal that would normally be performed each time the backward movement is stopped, resulting in a faster speed. This has the effect of making printing possible. Further, since unnecessary backup deletion is stopped, power consumption can be reduced.

[Brief explanation of the drawing]

FIG. 1 shows an example of an implementation configuration of the present invention, FIG. 2 shows an example of a conventional implementation configuration, and FIG. 3 shows a diagram of the principle configuration of the invention. In the figure, 1 is a keyboard, 2 is a keyboard control circuit, 3 is a set memory according to the present invention, 4 is a forward movement control circuit, 5 is a backlash removal control circuit, 6 is a reverse movement control circuit, 7 is a moving device, 8
9 represents a printing control circuit, and 9 represents a printing device.

Claims (1)

[Claims for Utility Model Registration] A keyboard unit for inputting data, a keyboard control circuit that detects the data input to the keyboard unit and sends out a predetermined movement signal or print signal, and a forward movement control circuit for moving in the opposite direction, a backward movement control circuit for moving in the opposite direction based on a backward movement signal, and a backlash removal control circuit for removing bumps based on the backward movement signal;
A typewriter comprising a print control circuit that prints based on a print signal, and prints in response to data input from the keyboard section, wherein the typewriter is configured to print based on a signal from the reverse direction movement control circuit.
The keyboard control circuit includes a set memory that stores the SET signal and stores the cleared state of the SET signal based on a signal from the forward movement control circuit or the backlash removal control circuit, and the keyboard control circuit stores the input data. A configuration for at least temporarily holding the decoding result when the decoding result is a printed signal; a configuration for reading and decoding the contents of the set memory when the decoding result is a printed signal; a configuration for notifying the print control circuit, and when the SET signal is stored as the storage content of the set memory under a state in which the print signal is held, an AND logic of the two is used;
and at least a configuration for sending a signal to the backlash removal control circuit, and when the backlash removal control circuit receives a signal with the AND logic, the backlash removal control circuit performs backlash removal and sends a signal to the print signal. A drive control device for a typewriter, characterized in that the printing control circuit that receives the data performs printing after the backlash has been removed.