JPS61195873A - Printer - Google Patents

Abstract

PURPOSE:To contrive a reduction in size of a capacitor or the like for coping with momentary service interruption and size of a power source, by a system wherein when service is momentarily interrupted, a stopped condition of a printing mechanism is saved, and when power is resupplied, the mechanism is reset to restart printing. CONSTITUTION:When an AC waveform detection signal (a) is maintained at zero level for a predetermined period of time and momentary service interrup tion is detected, driving of a printing head 5 and a motor 4 for moving a car riage carrying the head 5 thereon is stopped. Therefore, load on a power source part 1 is reduced, and it is sufficient to connect a capacitor capable of supplying an A/D converter 2-1, and MPU 2-2, a ROM 2-3, a RAM 2-4 and the like with minimum required currents to the primary side of a switching regulator, so that the power source part 1 can be made to be compact. When it is detected by the MPU 2-2 that the power source part 1 is resupplied with AC power, various control is started to restart printing at a part where printing has been stopped on detection of the momentary service interruption and restart other operations.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to printer devices, especially when there is a momentary power outage (hereinafter referred to as a momentary power outage) during printing, by temporarily stopping the printing mechanism, etc. The present invention relates to a printer device configured to reduce the capacity required in case of momentary power outage.

[Problems to be solved by conventional technology and invention] Conventionally,
In the case of a printer device connected to a computer system, etc., if the power supplied to the printer device suffers a momentary interruption (for example, a half-cycle momentary interruption), normal voltage will be supplied to the printing mechanism and control unit during the instantaneous interruption. To do this, a large capacitor was connected to the DC power supply line, or to the primary side of a switching regulator type power supply. For this reason, the size of capacitors and the like in preparation for instantaneous power outages becomes large, which poses a problem in that it is difficult to construct a compact power supply.

In particular, if a standard is established to maintain the power supply voltage at a specified value in the event of a half-cycle instantaneous interruption, and there is a peak maximum load during printing, the capacitor corresponding to the maximum load may be There was a problem in that it was necessary to connect to the primary side of the regulator, making it increasingly difficult to configure a compact power supply.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention detects the power outage state and temporarily stops the printing mechanism etc. when the power is momentarily cut off during printing, and then stops the printing mechanism etc. By adopting a configuration in which the printing mechanism is placed in a evacuated state, and when the power is turned on again, the evacuated state is restored and printing is resumed, reducing the size of capacitors, etc. that should be prepared for instantaneous power outages, and reducing the power supply. I'm trying to reduce the size. Therefore, in the printer device of the present invention, in a printer device configured to be able to supply power for a predetermined period of time in the event of a power outage in the AC power supply during printing, the printer device detects the power outage and the fact that the AC power supply has been turned on. AC power power failure/energization detection means, and a printing mechanism stop that stops the operation of the printing mechanism when a power failure is detected by the AC power power failure/energization detection means and resumes the operation of the printing mechanism when energization is detected. /return circuit, and when the operation of the printing mechanism is stopped by the printing mechanism stop/return circuit, the state of the printing mechanism at the time of stopping is evacuated, and when the operation of the printing mechanism is restored, the state of the printing mechanism is evacuated. and a resetting means for temporarily stopping the operation of the printing mechanism when the AC power supply is cut off, and restoring the operation of the printing mechanism to its original state when the AC power supply is turned on again, thereby printing. It is characterized by being configured so that it can be restarted.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a configuration diagram of one embodiment of the present invention, and FIG. 2 is an operation explanatory diagram for explaining the operation of the configuration of one embodiment of the present invention shown in FIG. 1.

In the figure, ■ is a power supply section, 1-1 is an AC waveform detection circuit, 2 is a control circuit section, 2-1 is an A/D converter, and 2-2 is an MPU
(microprocessor), 2-3 is ROM (read-only memory), 2-4 is RAM (readable/writable memory), 2-5 is I10 port section, 2-6 is interface circuit section, 3 is driver section , 3-1 represents a driver stop/return circuit, 3-2 represents a hammer circuit, 3-3 represents a motor circuit, 4 represents a motor, and 5 represents a print head.

In FIG. 1, an AC waveform detection circuit 1-1 is provided in the power supply unit 1, and is used to detect momentary interruption and re-energization of AC power supplied from the outside. This is for supplying the illustrated AC waveform detection signal, which is a voltage-divided version of the AC voltage supplied to the section 1, to the A/D converter 2-1. The AC waveform detection signal supplied to the 49 A/D converter 2-1 is converted into a digital value at every predetermined cycle and read by the MPU 2-2. Then, it is detected whether or not the AC power supplied to the power supply section 1 has momentarily been cut off or has been turned on again based on the read, so to speak, digital value of the sampled AC voltage. The procedure for detecting this is RO in the figure.
It is stored in M2-3 in the form of a program. If a momentary interruption is detected, for example, if it is detected that the AC waveform detection signal has been held at zero level for a predetermined period of time, the driver OFF signal shown in the figure turns off the driver part 3 via the I10 port part 2-5. The component driver stop/return circuit 3-1 is notified. By this notification, the operation of the hammer circuit 3-2 and motor circuit 3-3 that constitute the driver part 3 is stopped, and the operation of the print head 5 and the print head 5 are stopped.
The drive of the motor 4 for moving the carriage carrying the is stopped.

As a result, the print head 5 and motor 4 no longer serve as a load on the power supply section 1. Therefore, the load on the power supply unit 1 is reduced in the event of a momentary power outage, and other logic circuits such as the A/D converter 2-1, MPU 2-2, ROM 2-3
, RAM2-4, etc., by connecting a capacitor sufficient to supply the minimum necessary current to the primary side of the switching regulator, and the power supply section 1 can be configured compactly.

Additionally, when the MPU 2-2 detects that AC power is supplied to the power supply unit 1 again after a momentary power outage, the MPU 2-2
-2 is the driver stop/stop via I10 port section 2-5.
The driver OFF signal sent to the recovery circuit 3-1 is set to 1L level 3, for example, and the hammer circuit 3-2 and motor circuit 3-3 are switched to a drivable state, and the printing etc. resumed after the momentary power cut was detected. Start various controls to do so.

The interface circuit section 2-6 in the figure is for receiving data such as characters to be printed from a computer system or the like.

The operation will be explained in detail below using FIG. 2. Figure 2 (a) shows the AC waveform detection signal, Figure 2 (b) shows an example of characters already printed when a momentary interruption occurs during printing, and
Figure (c) shows an example of characters whose printing is resumed after a momentary interruption. still,
Since the printed characters as shown in FIGS. 2(B) and 2(C) are printed continuously, there is no need to print them again.

The AC waveform detection signal shown in FIG. 2(a) has a period T0 (for example, 20 m5 for 50 Hz).

In the figure: ■ At the time of power outage, the AC waveform detection signal becomes zero. The fact that the AC waveform detection signal has become zero is indicated by A/ in Figure 1.
This is done when the MPU 2-2 detects that the value converted into a digital value by the D converter 2-1 becomes zero continuously. When a power outage is detected, as described above, the MPU 2-2 in FIG. Stop printing. By stopping the printing, the character "character" is printed halfway, as shown in FIG. 2(b), for example. Also,
When the driver OFF signal to stop the printing is sent out, the position where the printing stopped temporarily in the middle of the character "character" shown in FIG. Take shelter inside.

Next, the restart of printing in FIG. 2(a) is performed when it is detected that the AC waveform detection signal is not zero. This detection is performed by the MPU 2-2 detecting that the value converted into a digital value by the A/D converter 2-1 in FIG. 1 is, for example, continuously non-zero. Upon detection of the non-zero state, the MPU 2-2 in FIG. 1 issues an "L" level driver opp (signal) to the driver stop/return circuit 3-1 via the I10 port 2-5, as described above. By resuming printing, for example, printing is restarted from the middle of the character 1 shown in Figure 2 (C). At this time, restarting printing is performed by saving data in the RAM 2-4 at the time of stopping. For example, based on the information that the printing was stopped in the middle of a character "character", the printing is continued from where it stopped.For this reason, the printing operation only temporarily stops, and the printed character Continuous characters can be printed without missing parts.Moreover, in order to reduce the load in the event of a momentary power outage, it is possible to reduce the power supply capacity required in the event of a momentary power outage, making the power supply part more compact. It can be done.

In the above-described embodiment, both the hammer and the motor are stopped when a momentary power interruption is detected, but it is clear that only the hammer may be stopped.

〔Effect of the invention〕

As explained above, according to the present invention, in the event of a momentary power outage during printing, the power outage is detected, the printing mechanism, etc. is temporarily stopped, and the printing state at the time of the stoppage is changed. The printer is evacuated, and when the power is turned on again, the evacuated printing state is reproduced and printing is restarted, so it is possible to reduce the size of capacitors, etc. that should be prepared for instantaneous power outages, thereby realizing a printing device with a smaller power supply size. .

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of one embodiment of the present invention, and FIG. 2 is an operation explanatory diagram for explaining the operation of the configuration of one embodiment of the present invention shown in FIG. 1. In the figure, l is a power supply unit, 1-1 is an AC waveform detection circuit, 2 is a control circuit unit, 2 to 1 are A/D converters, and 2-2 is an MPU.
(microprocessor), 2-3 is ROM (read-only memory), 2-4 is RAM (readable/writable memory), 2-5 is I10 port section, 2-6 is interface circuit section, 3 is part of driver , 3-1 represents a driver stop/return circuit, 3-2 represents a hammer circuit, 3-3 represents a motor circuit, 4 represents a motor, and 5 represents a print head. Patent applicant: Usatsuk Electronics Industry Co., Ltd. Representative patent attorney: Fumihiro Hase (2 others) Figure 2

Claims (1)

[Claims] In a printer device configured to be able to supply power for a predetermined period of time in the event of an AC power outage during printing,
A that detects power failure and power supply
A printing mechanism stop that stops the operation of the printing mechanism when a power outage is detected by the C power outage/energization detection means and the AC power outage/energization detection means, and resumes the operation of the printing mechanism when energization is detected. /return circuit, and when the operation of the printing mechanism is stopped by the printing mechanism stop/return circuit, the state of the printing mechanism at the time of stopping is evacuated, and when the operation of the printing mechanism is restored, the state of the printing mechanism is evacuated. and an evacuation/return means to temporarily stop the operation of the printing mechanism when the AC power supply fails, and
A printer device characterized in that the printing mechanism is configured to return to its original state and resume printing when AC power is turned on again.