JPH01186353A - Handy printer - Google Patents

Abstract

PURPOSE:To perform printing without allowing a large current to flow to a thermal head at once by controlling a printing means according to the speed signal from the moving speed detection means of a printer in a divided state by a plurality of printing control means. CONSTITUTION:When a speed signal 15 is inputted from a speed detection part 11 obtaining a moving speed from the number of rotations of a wheel due to the operation of a handy printer, a control part outputs data 16 and a transmission synchronous clock 17 and the data is latched on the basis of a data latch signal 18 by a driver 9. Thereafter, the control part outputs a trigger signal 22 and a printing signal 23 is sent to a driver by a timer IC 8. The control part outputs the enable signals 19-21 of respective drivers in synchronous relation to the trigger signal 22. By this method, the respective drivers drive thermal heat parts 12, 13, 14 in timings 24-26 to make it possible to realize a three-division type head driving system. Therefore, printing becomes possible without allowing a large current of flow to a thermal head at once.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing control device in a manual printer.

[Conventional technology]

In conventional manual printers, when driving a thermal head, all dots were controlled at the same time.

[Problem to be solved by the invention]

However, when controlling all dots at the same time, it is necessary to supply a large current to the thermal head, and the power supply that can be installed in small devices such as handy printers does not have sufficient capacity. This method has the problem of poor print quality such as lightness.

The present invention is intended to solve these problems, and its purpose is to perform printing without passing a large current through the thermal head at once.

[Means to solve the problem]

In a printer that manually moves a frame including a printing section, a) a printing means for thermal transfer printing, b) a speed detection means for detecting the moving speed when manually moving the printer, and C) the above. The present invention is characterized in that it includes a plurality of printing control means that control the printing means according to a speed signal from the speed detection means, and that the printing means is dividedly controlled by the plurality of printing control means.

〔Example〕

An embodiment of the handy printer of the present invention will be shown below.

FIG. 1 is a schematic diagram of the main body of the handy printer of the present invention. 1 is a printing unit that uses a thermal head as a print head, 2 is an ink ribbon cassette, 3 is a tape winding mechanism for pulling out and winding up the ink ribbon, and 4 is based on the rotation speed of the wheels by manually operating the handy printer. , a speed detecting section that obtains the moving speed; 5 is a printing control section that controls printing time based on the moving speed of the main body obtained by the speed detecting section 4; Any character can be printed out by manually moving the frame 6 including each of the components 1 to 5 above on any paper.

FIG. 2 shows a circuit explanatory diagram of the present invention. 70 control section is
16 to 22 according to the speed signal 15 from the speed detection section 11
Printing control is performed by outputting a 0 control signal and a data signal. 16 is print data, 17 is a synchronization clock for transferring data, 18 is a data latch signal, 19-
21 is an enable signal for each driver 9;

22 is a trigger signal for starting printing. 8 is a timer IC for composing the print signal 23 from the trigger signal 22; 10 is a printing section consisting of a thermal head. 10
By dividing the thermal head into three parts 12, 13, and 14 and driving each part in a time division manner, it is possible to reduce the current flowing per degree to 173.

FIG. 3 shows a timing chart when the circuit shown in FIG. 2 is actually operated. 15 to 26 indicate the timing of each part of the circuit diagram of FIG. 27 to 29 indicate states in which the moving speed of the handy printer is increased. Speed detection section 1
0N10FF interval of speed signal 15 from 1 is 27>28
>29, which indicates an increase in speed.

Here, when the speed signal 15 is input, the control unit 7 outputs the data 16 and the transfer synchronization clock 17, and the data latch signal 18
The driver 9 latches the data. Thereafter, the control section outputs a trigger signal 22, and the timer IC, 8 sends a print signal 23 to the driver. Control is also performed by enabling signals 19 to 21 of each driver in synchronization with the trigger signal 22.
Output.

By doing so, each driver drives each of the 12 to 14 thermal head sections at timings 24 to 26, and a three-division head drive system can be realized.

Further, in the above embodiment, a three-division method was explained, but by changing the number of divisions depending on the amount of current that can be passed by the power source used, a multi-dot thermal head can be driven. Conversely, the thermal head can be driven by a smaller power supply device by increasing the number of divisions by using a power supply that can flow a smaller amount of current.

〔Effect of the invention〕

As described above, according to the present invention, since a method is adopted in which a plurality of thermal head drivers are used to drive the thermal head in a time-sharing manner, printing can be performed without flowing a large current to the thermal head at once. Therefore, it is possible to drive a multi-dot thermal head using a constant power source.

Furthermore, the thermal head can be driven using a power source that cannot output large currents.

In the case of a handy printer, since its size is limited, it is necessary to print using a power source as small as possible and as small as possible, so the device shown in the present invention is very effective.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a handy printer as an embodiment of the present invention. FIG. 2 is a circuit explanatory diagram. FIG. 3 is a timing chart corresponding to the circuit explanatory diagram. 15... Speed signal 16... Data signal 17... Transfer synchronization clock 18... Latch signals 19-21... Driver enable signal 22... Trigger signal 23... Print signal 24 = 26. ...Printing timing or more Applicant: Seiko Even Co., Ltd.

Claims (1)

[Scope of Claims] A printer of a type in which a frame including a printing section is manually moved includes: a) a printing means for thermal transfer printing; and b) a speed detector for detecting the moving speed when manually moving the printer. and c) a plurality of printing control means for controlling the printing means according to the speed signal from the speed detection means, and the printing means is dividedly controlled by the plurality of printing control means. printer.