JPH0284097A - Printer driving gear - Google Patents

Abstract

PURPOSE:To compose an magnet drive circuit only of circuit components, and reduce a cost extremely by setting a power-supply circuit section functioning as a motor drive circuit section. CONSTITUTION:When printing command is generated by key input operation, then from a central processing device 1, the output of motor driving signal MT is generated, and a transistor Q1 is turned ON, and a power-supply circuit section 4 is set in a working state, and current is fed to a magnet drive circuit section 5. When printing is performed, then the output of the printing signal PO of the central processing device 1 is generated, and the transistor Q3 of the magnet drive circuit 5 is turned ON, and voltage is applied to a magnet MG, and the printing is performed.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a method for printing electronic equipment with a printer, etc., by rotating the motor by supplying a drive voltage to it when a printing command is issued by a key manually. The present invention relates to a printer driving device that enables printing and drives a magnet using a printing command signal to perform printing.

<Prior Art> This type of conventional printer driving device generally has a configuration as shown in FIG. That is, the input terminal It, 1 is connected to an adapter (not shown) of an electronic device with a printer.
When DC power is supplied to 2, the transistor Q1 whose base is biased through the resistor R1 and the Zener diode 2 is immediately turned on, and a voltage of V r -V Mis is driven between the collector of the transistor Q2 and the input terminal 12. Voltage is generated. When the motor drive signal MT is output from the central processing bag f1 consisting of an LSI, the switching transistor Q2 whose base is biased via the resistors R2 and R3 is turned on by this motor drive signal MT, and this on state The motor driving voltages v and -Vi mentioned above are supplied to the second printer motor M through the transistor Q2, and the motor M is driven to rotate and becomes ready for printing.

In this printable state, when the central processing unit 1 outputs the print command signal PO, the switching transistor Q3 whose base is biased via the resistors R4 and R5 is turned on by this print signal PO, and this on state The aforementioned drive voltages v and vsc are supplied to the magnet MG through the transistor Q3, and the magnet MO
is driven to perform printing. In the figure, CI and C2 are capacitors for noise absorption, and D is a diode for cutting noise of the magnet MG.

In addition, as shown by the dashed line, the integrated circuit 3 may be configured using an integrated circuit 3, and this integrated circuit 3 includes a motor drive circuit section consisting of a transistor Q2 and resistors R2 and R3, a transistor Q3, a resistor R4 , R5 and a diode D is formed, and the motor M is connected to the motor M via the integrated circuit 3 by the motor drive signal MT and print command signal PO from the central processing unit 1.
and magnet MG are each driven and controlled.

<Problems to be Solved by the Invention> However, in the printer driving device, the driving voltages v and vsc created by the printer power supply circuit section including the transistor Q1 and the Zener diode Z are individually supplied to the motor M and the magnet MG. In order to do this, a motor drive circuit section and a magnet drive circuit section are required, which has the drawback of making the configuration relatively complicated, resulting in an increase in size and cost. In addition, at the same time when power is turned on to an electronic device with a printer, the power supply circuit unit becomes operational, and the central processing unit 1 outputs a motor drive signal MT and a print command signal PO.
There is a problem in that even during non-printing when no signal is output, current consumption flows through the transistor Q1, Zener diode Z, etc. in the power supply circuit section, resulting in wasted power consumption.

On the other hand, when the integrated circuit 3 is used, it has the advantage of being miniaturized;
．． Since it is more expensive than the case where it is constructed from individual circuit components such as Q3 and resistor R2 to R5, the cost is further reduced.
Furthermore, when not printing, current always flows through the integrated circuit 3 in addition to the power supply circuit, further wasting power, and an adapter with a small current capacity cannot be used. It's bad.

The present invention was made in view of these conventional problems, and it is possible to drive and control the motor and magnet with a simplified and inexpensive circuit configuration, and prevent wasteful power consumption during non-printing operations. The technical problem is to provide a printer drive device that can perform the following functions.

Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, a printer drive device is configured as follows. That is, in a printer drive device that applies a motor drive voltage to a printer motor to rotate the motor, and also drives a printer magnet in response to a print command signal to perform printing, the above-mentioned a central processing unit that outputs a motor drive signal and a print command signal; a power supply circuit unit that is turned on by the motor drive signal and supplies a drive voltage to the motor; and a power supply circuit that is turned on by the print command signal and supplies a drive voltage to the motor; and a magnet drive circuit section that supplies a drive voltage to the power supply circuit section.

Effect> With the above configuration, during non-printing operation,
Since the motor drive signal is not output from the central processing unit,
The power supply circuit section is in an off state, and no unnecessary current flows.

Then, when a printing command is issued manually by the key, the central processing unit detects this and outputs a motor drive signal from a specific output boat, turning on the power supply circuit and driving the motor from this power supply circuit. When voltage is supplied, the motor rotates and becomes ready for printing, and then a print command signal is output, the print command signal turns on the magnet drive circuit, and the power supply circuit is turned on through the magnet drive circuit. A driving voltage is supplied to the magnet from the magnet 7), and the magnet 7) is driven to perform printing. In the printer drive device, the power supply circuit is turned on only when the motor drive signal is output, that is, when the printer is operating, and the drive voltage is directly supplied to the motor from this power supply circuit, so that it can be used even during non-printing operations. Sometimes unnecessary current does not flow, and
Since the power supply circuit unit also has the function of the motor drive circuit of the existing device, the configuration is greatly simplified.

<Example> Hereinafter, a preferred example of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing an embodiment of the present invention, the same or substantially equivalent parts as in FIG. 3 are given the same reference numerals. The difference from FIG. 3 is that the motor drive circuit section consisting of the transistor Q2 and resistors R2 and R3 in FIG. 3 is removed and the other end of the motor M is directly connected to the other input terminal II, and the central processing The output port of the motor drive signal of device 1 is connected to the connection point between transistor Q1 and Zener diode Z via resistor R6, and resistor R1, which was connected between the collector and base of transistor Q1 in FIG. , is only connected between the emifter and base of the transistor Q1.

Next, to explain the operation of the above embodiment, when a printing command is issued by manual key operation, the central processing unit 1 detects it and the motor drive signal MT becomes high level (+30 volts). By applying the voltage to the base, the transistor Q1 is turned on, and the power supply circuit section 4 is put into an operating state, and voltages v and v are applied to both ends of the transistor Q1.
A driving voltage of sc is generated, and this voltage v,
vsc is immediately supplied to the motor M, the motor M is rotationally driven, and becomes ready for printing. On the other hand, when a printing command is not issued, that is, during non-printing operation, the motor drive signal MT becomes a low level (0 volts), the transistor Q1 is turned off, the power supply circuit section 4 does not operate, and the above-mentioned voltage V , VNG is not generated, so there is no wasted power consumption, and the power supply circuit section 4 receives the motor drive signal MT.
Since it only operates when is at a high level, an adapter with a small current capacity can be used. Also,
Since the power supply circuit section 4 also functions as a motor drive circuit, the circuit configuration is greatly simplified.

When printing is to be performed, the print signal PO of the central processing unit 1 becomes high level (+30 volts), and the transistor Q3 of the magnet drive circuit 5 is turned on.
Through this on-state transistor Q3, the magnet l-
Voltage Vp VNG is supplied to MG, and magnet MG
is driven to print.

FIG. 2 shows a block configuration of an electronic device with a printer to which the device of the embodiment is applied, and the same components as in FIG. 1 are given the same reference numerals. The central processing unit 1 is supplied with power via an adapter 6, and based on commands from a key matrix 7, controls a power supply circuit section 4 and a magnet drive circuit section 5 of the printer drive device using a motor drive control signal MT and a print command signal PO. In addition to controlling each as described above, the printer 2 is also directly controlled and displayed on the display tube 8.

<Effects of the Invention> Since the present invention is configured and operates as described above, it produces the following effects. In other words, since the power supply circuit section also has the function of the motor drive circuit section, only the magnet drive circuit section is constructed from circuit components without using an integrated circuit, resulting in a significantly simplified configuration using inexpensive circuit components. As a result, significant cost reductions can be achieved. In addition, since the power supply circuit is turned on only when a motor drive signal is output due to a print command, current does not flow to the power supply circuit during non-printing operations, which saves power.In addition, current only flows to the power supply circuit during printing operations. Because it is,
An adapter with low current consumption and low current capacity can be used.

[Brief explanation of the drawing]

Figure 1 is an electrical circuit diagram of one embodiment of the present invention, and Figure 2 is the electrical circuit diagram of one embodiment of the present invention.
Figure 3 is a block diagram of an electronic device with a printer to which the figure is applied. Figure 3 is an electrical circuit diagram of a conventional device. 1 - Central processing unit 2 - Printer 4 - Power supply circuit section 5 - Magnet drive circuit section M - Motor MG - Magnet

Claims (1)

[Claims] (1) In a printer drive device that applies a motor drive voltage to a printer motor to rotate the motor, and also drives a printer magnet using a print command signal to perform printing, based on a print command, a central processing unit that outputs the motor drive signal and the print command signal; a power circuit section that is turned on by the motor drive signal and supplies a drive voltage to the motor; A printer drive device comprising: a magnet drive circuit section that supplies a drive voltage of the power supply circuit section to a magnet.