JP2762925B2 - Power supply device for printer and printer device using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply for a printer and a printer using the same.

[0002]

2. Description of the Related Art A conventional power supply control device for a printer is configured separately from a power supply, sets one upper limit value of the internal temperature of the power supply, and elapses a predetermined time after a temperature detection circuit detects the upper limit value. Later, the internal temperature of the power supply was detected again, and the printing operation was controlled in accordance with the state of the load, regardless of the state of the system upper side. (For example, see JP-A-3-1582
No. 78)

[0003]

In a conventional power supply control device for a printer, when it is determined that overload is caused by solid printing or the like,
With the power supply voltage output as it is, printing was temporarily stopped only by a command from the printer control unit. Therefore, when the power supply voltage was supplied to other than the printer control unit, it took time to lower the detected temperature. Further, since the power supply always outputs the driving voltage of the printer device, there is a disadvantage that the power supply cannot be protected if printing is continued for some trouble.

Since the power supply and the power supply control device are different from each other, there is an inconvenience that the device cannot be downsized.

[0005]

An object of the present invention is to provide a power supply device for a printer which can improve the disadvantages of the prior art, and in particular, can improve the reliability and reduce the size of the device, and a printer device using the same. That is its purpose.

[0006]

According to a first aspect of the present invention, there is provided a power supply unit for supplying power to a printer , and a power supply control unit for controlling the operation of the power supply unit. In addition, a power supply control unit captures an abnormal temperature of the power supply unit using the first set value and outputs a printer abnormal temperature signal, and a printing temperature detection circuit, and stops printing when the abnormal temperature signal is received. After outputting the command, the drive
A DC output voltage ON / OFF circuit that stops the output of the pressure
Have. The power supply control unit further includes a power supply temperature abnormality detection circuit that captures an abnormal temperature of the power supply unit using the second set value and outputs a power supply abnormal temperature signal, and shuts down the power supply when the power supply abnormal temperature signal is received. After outputting the declaration externally
Includes printer device drive and logic voltages
A power oscillation stop circuit for stopping the supply of all power is provided .

[0007] In the present invention of claim 2, wherein, DC output voltage ON / OFF circuit, the printer instrumentation when the output of the printer abnormal temperature signal from the print time of temperature detection circuit is stopped
And a DC voltage output restart function for restarting the output of the driving voltage of the device.

According to the third aspect of the present invention, the power supply unit includes a cooling fan for lowering the internal temperature by blowing air,
The output voltage ON / OFF circuit is provided with a forced cooling function for controlling the rotation speed of the cooling fan to increase when the power supply abnormal temperature signal is received.

According to a fourth aspect of the present invention, the printer power supply unit, a printer control unit that receives a logic voltage from the power supply unit and controls the operation of the printer device, and supplies a drive voltage from the power supply unit. And a printing unit for receiving and printing on a medium such as paper. In addition, the printer control unit has a print stop function of stopping the drive of the print unit when receiving a print stop command from the output voltage ON / OFF means.

The present invention aims to solve the above-mentioned disadvantages by these means and achieve the above-mentioned object.

[0011]

According to the first aspect of the present invention, during the operation, the power supply supplies power necessary for driving the printer. At this time, the printing temperature detecting circuit captures an abnormal temperature that may be generated by a printing operation such as solid printing of the printer device and outputs a printer abnormal temperature signal. The DC output voltage ON / OFF circuit outputs a print stop command when the abnormal temperature signal is received, and then outputs a driving power to the printer device.
Stop pressure output. The power supply temperature abnormality detection circuit
An abnormal temperature that can damage the components of the power supply is captured and a power abnormal temperature signal is output. The power oscillation stop circuit is
When the power supply abnormal temperature is received, an external
After output, drive voltage and logic of printer device
The supply of all power including the operating voltage is stopped.

According to the second aspect of the present invention, when the output of the printer abnormal temperature signal from the temperature detecting circuit for printing is stopped after the temperature detecting circuit for printing continuously captures the abnormal temperature, the DC output voltage is changed. ON / OFF circuit is a printer device
Restarts the output of the drive voltage.

[0013] In the present invention of claim 3, wherein the cooling fan is reduced by blowing the elevated temperature. DC
The output voltage ON / OFF circuit controls to increase the rotation speed of the cooling fan by receiving the power supply abnormal temperature signal.

According to the fourth aspect of the present invention, the printer power supply supplies a logic voltage and a driving voltage to the printer. The printer control unit controls the operation of the printing unit by receiving the supply of the logic voltage from the power supply unit. The printing unit receives the supply of the driving voltage from the power supply unit, is driven and controlled by the printer control unit, and prints on a medium such as paper. During this operation, the printer control unit outputs the output voltage ON / O.
When a print stop command is received from the FF means, the driving of the printing unit is stopped. Subsequently, the supply of the driving power to the printing unit is stopped.

[0015]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a printer power supply device according to the present invention. Power supply for printer
Location includes a print time of the temperature detection circuit 5 which compares the the power supply internal temperature by the temperature sensor 1 set temperature (set value 1),
When the internal temperature exceeds the set value 1, the printer controller
When the supply of the driving voltage to the printer is stopped , the supply of the voltage is stopped, and when the internal temperature falls below the set value 1 after the stop, the power is supplied to the printer control unit. And a DC output voltage ON / OFF circuit 6 that outputs a drive voltage after the signal is transmitted. Step
The power supply unit for the linter is further equipped with DC output voltage ON / OFF
If the internal temperature further rises even if the supply of power is stopped by the circuit and exceeds the temperature (set value 2) set by the temperature sensor 2 of the power supply temperature abnormality detection circuit 3, all outputs are cut off as a power supply abnormality and latched. A power oscillation stop circuit for causing the power supply to stop.

Next, the operation will be described. In the printer power supply device, the printing temperature detection circuit 5 detects the temperature of the power supply and detects the temperature set by the temperature sensor 1 (set value 1).
Is exceeded, the output voltage ON / OFF signal 1 which is a print stop instruction is sent to the printer control unit to stop the print operation.
Send 1 DC output voltage ON / OFF circuit 6, drive
The supply of the operating voltage is stopped, and the rotation speed of the power-supply built-in FAN 13 is raised above the normal level to forcibly cool the inside to reliably lower the inside temperature. Next, when the internal temperature falls below the set value 1, the return of the supply of the driving voltage is transmitted to the printer control unit by the output voltage ON / OFF signal 11, and then output again by the DC output voltage ON / OFF circuit 6. And print. If the internal temperature further rises even if the supply of the driving voltage is stopped and exceeds the temperature set by the temperature sensor 2 (set value 2), it is determined that the power supply is abnormal, and all outputs are cut off by the power supply oscillation stop circuit. Let it. Therefore, in the present embodiment, the cause of the abnormal temperature caused by stopping the printing by the printing control unit and stopping the output voltage inside the power supply in two steps is eliminated, thereby improving the reliability.

This will be described in detail. FIG. 2 is a block diagram showing the configuration of a printer using the printer power supply according to the present invention. The configuration of the internal circuit of the power supply 19 includes a power supply primary circuit 8, a transformer 9, and a power supply secondary circuit 10.
A circuit for monitoring the temperature sensors 1 and 2 for detecting the temperature of the components on the primary and secondary sides of the power supply, and a power supply control circuit;
A power supply internal control circuit 22 composed of a DC output voltage ON / OFF circuit for transmitting an output voltage ON / OFF signal to the printer control unit 17, and a cooling fan for lowering the internal temperature of the power supply
There are thirteen. The power supply 19 receives power from the printing unit 20 (motor unit 16, head unit 14, printing control unit 15), printer control unit 17, and other driving units 18.
(For example, a motor other than the head drive, such as a medium transport motor such as a passbook) .

In normal operation, if there is no power failure (such as overcurrent or overvoltage), the printer power supply supplies a voltage to the load side. However, when a non-specification pattern (for example, solid printing is performed continuously) is performed in printing on a passbook or other medium, the internal components of the power supply (transformers, switching elements, etc.)
The temperature rises and eventually destroys the power supply. In order to prevent this, the temperature is monitored by the temperature sensor 1 inside the power supply, and when the internal temperature exceeds the set value 1 due to a printing abnormality (solid printing or the like), the output voltage O is sent to the printer control unit 17.
The N / OFF signal 12 is transmitted to temporarily stop printing, and further stop supplying the driving voltage. This allows the temperature of the parts
Decrease the degree early.

At this time, the temperature is forcibly lowered by raising the fan 13 with a built-in power supply above the normal rotation speed, and the set value 1
The time it takes to lower is further reduced. Also, there is a certain time difference between the stop of printing and the stop of the output of the driving voltage of the printer device , and the printing process is performed during that time. When such control is performed and the internal temperature falls below the set value 1, the output voltage ON / OFF signal 12 is transmitted to the printer control unit 17 to restart printing.

In the example shown in FIG .
If the internal temperature of the power supply 19 exceeds the set value 2 (set value 1 <set value 2) set by the temperature sensor 2 even after the output of the drive voltage supply terminal 11 is stopped, it is determined that the power supply is abnormal, The oscillation of the power supply 19 is stopped and all outputs (output terminals 11
And 21) are cut off.

As described above, according to the present embodiment, the power supply itself detects the internal temperature and supplies the internal temperature to the printing unit as needed.
The power supply is protected by stopping only the drive voltage that is required, and a signal is sent to the host controller to stop printing at the head and reduce the load on the power supply. Can be enhanced.

[0022]

According to the present invention, the printing temperature detecting circuit captures an abnormal temperature based on the first set value which can be generated in the power supply unit due to solid printing or the like of the printer device, and outputs a printer abnormal temperature signal. The output voltage ON / OFF circuit outputs a print stop command when the abnormal temperature signal is received, and then stops supplying the driving voltage of the printer device .
It is possible to stop the driving of the printer device which has caused the abnormal temperature and suppress the heat generation of the power supply itself. Further, the power supply temperature abnormality detection circuit captures the abnormal temperature according to the second set value enough to damage the components of the power supply unit and outputs a power supply abnormal temperature signal. After receiving the signal and outputting a power stop declaration to the outside, all output voltages including the logic voltage for the printer are stopped, so that even if the drive voltage of the printer is stopped, When the temperature continues to rise due to the cause and becomes an abnormal temperature enough to damage the components of the power supply unit, the entire driving of the printer using the printer power supply of the present invention can be stopped. As described above, the reliability of the device can be significantly improved, and since the power supply unit and the power supply control unit are configured, the size of the device can be significantly reduced as compared with the related art. A power supply device for a printer and a printer device using the same can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a printer power supply device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a printer device according to an embodiment of the present invention.

[Explanation of symbols]

 1, 2 temperature sensor 3 internal temperature abnormality detection circuit 4 power oscillation stop circuit 5 internal temperature detection circuit 6 DC output voltage ON / OFF circuit 12 output voltage ON / OFF signal

Claims (4)

(57) [Claims] 1. A printer power supply device comprising: a power supply unit for supplying power to a printer device; and a power supply control unit for controlling the operation of the power supply unit, wherein the power supply control unit detects an abnormal temperature of the power supply unit. A temperature detecting circuit for printing which captures using the first set value and outputs a printer abnormal temperature signal, and outputs a print stop command when receiving the abnormal temperature signal and then drives the printer device
And a DC output voltage ON / OFF circuit for stopping the output of the power supply voltage.
The purine settings and power the temperature abnormality detecting circuit that captures and outputs a power failure temperature signal using the value, after the power supply stop declared when it receives the power failure temperature signal and external output
All voltage including drive voltage and logic voltage of
A power supply device for a printer, comprising: a power supply oscillation stop circuit for stopping power supply. 2. The DC output voltage ON / OFF circuit comprises:
A DC voltage output resuming function for resuming output of a driving voltage of the printer device when output of a printer abnormal temperature signal from the printing temperature detection circuit is stopped. 2. The power supply device for a printer according to 1. 3. The power supply unit includes a cooling fan for reducing an internal temperature by blowing air, and a DC output voltage ON / OFF.
3. The printer power supply device according to claim 1, wherein the circuit has a forced cooling function for controlling to increase the rotation speed of the cooling fan when the printer abnormal temperature signal is received. 4. A power supply device for a printer according to claim 1, 2, or 3, further comprising: a printer control unit that receives a supply of a logic voltage from said power supply unit and controls an operation of the printer device.
A printing unit for receiving a drive voltage from the power supply unit and printing on a medium such as paper, wherein the printer control unit controls the DC output voltage ON / OFF.
A printer device comprising a print stop function for stopping driving of the printing unit when a print stop command is received from a circuit.