JPH04106576A - Mechanism for controlling heater of page printer - Google Patents

Abstract

PURPOSE:To shorten the rising time of a page printer by impressing a voltage higher than the voltage at the time of an ordinary operation to a heater of a fixing section at the time of turning on of a power source. CONSTITUTION:A generation section 2 for the information on the impressed voltage at the time of the turning on of the power source is started by the control of an initial setting section 1 at the time of turning on of the power source when the power source is turned on. A control section 4 for the impressed voltage controls a generation section 5 for the impressed voltage so as to impress the impressed voltage in accordance with the information on the impressed voltage at the time of the turning on of the power source obtd. from the generation section 2 for the information. The information on the impressed voltage at the time of turning on of the power source and at the time of the ordinary operation is set in such a manner that the impressed voltage to the heater 6 of the fixing section at the time of the turning on of the power source is higher than the impressed voltage at the time of the ordinary operation, by which the temp. rising speed of the fixing section 9 at the time of the turning on of the power source is increased. The initial setting section 1 starts the generation section 3 for the information on the impressed voltage at the time of the ordinary operation when the temp. of the fixing section 9 detected by a temp. sensor 8 for the fixing section attains a specified value or above. Consequently, the control section 4 controls the generation section 5 so as to impress the impressed voltage in accordance with the information on the impressed voltage at the time of the ordinary operation obtd. from the generation section 3 for the information.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a heater control mechanism for a page printer.

[Conventional technology]

Conventionally, the heater control mechanism of a page printer applies the same voltage to the heater of the fixing unit even when the power is turned on as during normal operation.

[Problem to be solved by the invention]

The heater control mechanism of the conventional page printer described above applies the same voltage to the fuser heater when the power is turned on as during normal operation, so the temperature rise rate of the fuser unit is slow when the power is turned on, and the temperature rises quickly when the power is turned on. The disadvantage is that the start-up time of the page printer is long.

[Means to solve the problem]

The heater control mechanism of the page printer of the present invention includes a fixing section, a fixing section heater that heats the fixing section, an applied voltage generating section that supplies voltage to the fixing section heater, and a voltage generated by the applied voltage generating section. an applied voltage control section that controls based on input voltage information; and normal operation applied voltage information that outputs information about a first voltage that the applied voltage generating section should generate during normal operation to the applied voltage control section as the voltage information. a power-on applied voltage information generating section that outputs information about a second voltage higher than the first voltage to the applied voltage control section as the voltage information; and detecting the temperature of the fixing section. a fixing section temperature sensor, and when the power is turned on, the applied voltage information generating section is activated, and when the temperature detected by the fixing section temperature sensor reaches a predetermined temperature, the normal operation applied voltage information generating section is activated. It also has an initial setting section when the power is turned on.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

When the power is turned on, the power-on applied voltage information generating section 2 is activated under the control of the power-on initial setting section 1 . As a result, the applied voltage control section 4 controls the applied voltage generation section 5 so that the applied voltage at power-on can be applied based on the applied voltage information at power-on obtained from the applied voltage information generation section 2 at power-on.
control.

When a voltage is applied from the applied voltage generating section 5 to the fixing section heater 6, the temperature of the fixing section 9 increases.

When the temperature of the fixing section 9 detected by the fixing section temperature sensor 8 exceeds a certain value, the power-on initial setting section 1 starts up the applied voltage information generating section 3 during normal operation. As a result, the applied voltage control section 4 controls the applied voltage generation section 5 so that the applied voltage during normal operation can be applied based on the applied voltage information during normal operation obtained from the applied voltage information generation section 3 during normal operation. .

Thereafter, based on the temperature information of the fixing section 9 detected by the fixing section temperature sensor 8, the fixing section temperature control section 7 controls the applied voltage generating section 5 so that the temperature of the fixing section 9 takes a value within a certain range. Control.

By setting the applied voltage information at power-on and the applied voltage information during normal operation so that the voltage applied to the fixing unit heater 6 at power-on is higher than the voltage applied during normal operation, the fixing unit 9 when the power is turned on is set. The rate of temperature rise becomes faster.

〔Effect of the invention〕

As explained above, the present invention speeds up the rate of temperature rise in the fixing section when the power is turned on by controlling the voltage applied to the fixing section heater at a level higher than that during normal operation when the power is turned on, thereby increasing the speed at which the page printer starts up. It has the effect of shortening the time.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Initial setting section at power-on, 2... Applied voltage information generation section at power-on, 3... Applied voltage information generation section during normal operation, 4... Applied voltage control section, 5... Applied voltage generation section, 6... Fixing section heater, 7... Fixing section temperature control section, 8... Fixing section temperature sensor, 9... Fixing section.

Claims (1)

[Claims] A fixing unit, a fixing unit heater that heats the fixing unit, an applied voltage generation unit that supplies voltage to the fixing unit heater, and applied voltage control that controls the voltage generated by the applied voltage generation unit based on input voltage information. a normal operation applied voltage information generation section that outputs information on a first voltage that the applied voltage generation section should generate during normal operation to the applied voltage control section as the voltage information; a power-on applied voltage information generating section that outputs information on a predetermined second voltage as the voltage information to the applied voltage control section; a fixing section temperature sensor that detects the temperature of the fixing section; and a power-on initial setting section that starts the applied voltage information generating section when the power is turned on and starts the applied voltage information generating section during normal operation when the temperature detected by the fixing section temperature sensor reaches a predetermined temperature. A heater control mechanism for a page printer featuring: