Abstract: A fixing device includes a fixing member, a pressuring member and a temperature sensing part. The fixing member heated by a heat source contacts with a recording medium to heat a toner image on the recording medium. The pressuring member pressures the recording medium to the fixing member. The temperature sensing part in non-contact with the fixing member includes an infrared sensing element sensing infrared rays from the fixing member and a condensing member condensing the infrared rays to the infrared sensing element. Detection temperature of the fixing member is calculated with a sensing value by the infrared sensing element. The detection temperature or control temperature of the heat source is corrected with temperature deference between the infrared sensing element and the condensing member. Heating of the fixing member is controlled with the corrected detection temperature and the control temperature or the detection temperature and the corrected control temperature.

Abstract: A fixing device includes a fixing member, a pressuring member, a temperature sensing part and an air blow controlling part. The fixing member heated by a heat source heats a toner image on the recording medium. The temperature sensing part includes an infrared sensing element sensing infrared rays from the fixing member and a condensing member condensing the infrared rays to the infrared sensing element. The air blow controlling part executes and stops the air blow to the temperature sensing part. Detection temperature of the fixing member is calculated with a sensing value by the infrared sensing element. The detection temperature or control temperature of the heat source is corrected with air blow condition by the air blow controlling part and temperature deference between the infrared sensing element and the condensing member. Heating of the fixing member is controlled with the corrected detection temperature or the corrected control temperature.

Abstract: A fixing device includes a fixing member, a pressuring member and a temperature sensing part. The fixing member heated by a heat source contacts with a recording medium to heat a toner image on the recording medium. The pressuring member pressures the recording medium to the fixing member. The temperature sensing part in non-contact with the fixing member includes an infrared sensing element sensing infrared rays from the fixing member and a condensing member condensing the infrared rays to the infrared sensing element. Detection temperature of the fixing member is calculated with a sensing value by the infrared sensing element. The detection temperature or control temperature of the heat source is corrected with temperature deference between the infrared sensing element and the condensing member. Heating of the fixing member is controlled with the corrected detection temperature and the control temperature or the detection temperature and the corrected control temperature.

Abstract: The fixing device includes a fixing member, a pressing member, and a heat source. The fixing member heats toner on a medium. The pressing member forms a pressing area with the fixing member and presses the toner. The heat source is provided corresponding to the pressing area across the fixing member and heats the fixing member. The heat source includes a heat insulation layer and a heating and contacting part. The heat insulation layer is laminated on a base material and has a convex part that protrudes toward the fixing member. The heating and contacting part is laminated on the heat insulation layer that has the convex part and contacts to an inner surface of the fixing member so as to heat the fixing member. The convex part protrudes the heating and contacting part laminated thereon toward the fixing member so as to maximize pressure in the pressing area.

Abstract: A heating unit includes a circuit board, heating parts, and electrode parts. The heating parts are arranged in a first direction on a surface of the circuit board. The electrode parts are disposed on the surface of the circuit board, and electrically connected to both sides of the heating parts in a second direction that is orthogonal to the first direction. Each of the heating parts includes a plurality of heating resistors that is arranged in the first direction. Each of the heating resistors has a size ratio of a first length in the second direction to a second length in the first direction is 1 or more and 100 or less.

Abstract: A fixing device includes a fixing member, a pressuring member, a separation member and a bearing. The fixing member is heated by a heat source. The pressuring member is brought into pressure contact with the fixing member to form a fixing nip with the fixing member. The separation member has a main body part and a shaft part projecting in an axial direction from the main body part to become the rotation center, and is configured so that one end of the main body part come into contact with the fixing member. The bearing pivotally supports the shaft part of the separation member. The bearing is formed so that its contact portion coming into contact with the shaft part has shorter width in the axial direction than other portion.

Abstract: A contactless type temperature detecting device includes a temperature detecting sensor, a separating plate, an airflow path forming member, an air blower and an air hole. The temperature detecting sensor has a temperature detecting surface facing a heated body. The separating plate is configured to separate a first space on a side of the temperature detecting surface of the temperature detecting sensor from a second space on an opposite side of the temperature detecting surface. The airflow path forming member is provided on a surface of the separating plate on either one side of the first space or the second space. The air blower is configured to simultaneously form air flow in the first space and the second space. The air hole is provided along an outer circumference of the temperature detecting sensor and configured to communicate the first space with the second space.

Abstract: The fixing unit has a housing that has a heating roller and a pressing roller accommodated therein. A temperature detection sensor and a sensor board are provided outside the housing. An image forming apparatus includes a sensor protection tube. The sensor protection tube includes a hollow cylindrical body passing through a side wall portion of the housing. One end of the sensor protection tube abuts a mounting surface of the temperature detection sensor in the sensor board so as to surround a periphery of the temperature detection sensor. The other end of the sensor protection tube is positioned in the housing.

Abstract: A contactless type temperature detecting device includes a temperature detecting sensor, a separating plate, an airflow path forming member, an air blower and an air hole. The temperature detecting sensor has a temperature detecting surface facing a heated body. The separating plate is configured to separate a first space on a side of the temperature detecting surface of the temperature detecting sensor from a second space on an opposite side of the temperature detecting surface. The airflow path forming member is provided on a surface of the separating plate on either one side of the first space or the second space. The air blower is configured to simultaneously form air flow in the first space and the second space. The air hole is provided along an outer circumference of the temperature detecting sensor and configured to communicate the first space with the second space.

Abstract: A fixing device includes a fixing belt, a pressuring member, a heating member, a voltage applying part, a current detecting part, a moving member, a driving mechanism and a controlling part. The voltage applying part applies a heating voltage for heating the fixing belt to the heating member. The current detecting part detects current flowing through the heating member. The moving member is movable between a first position where the current becomes a first value and a second position where the current becomes a second value. The driving mechanism moves the moving member from the first position to the second position in conjunction with a rotation stop of the fixing belt. The controlling part stops the voltage applying part from applying the heating voltage to the heating member in conjunction with a change of the current from the first value to the second value.

Abstract: The fixing unit has a housing that has a heating roller and a pressing roller accommodated therein. A temperature detection sensor and a sensor board are provided outside the housing. An image forming apparatus includes a sensor protection tube. The sensor protection tube includes a hollow cylindrical body passing through a side wall portion of the housing. One end of the sensor protection tube abuts a mounting surface of the temperature detection sensor in the sensor board so as to surround a periphery of the temperature detection sensor. The other end of the sensor protection tube is positioned in the housing.

Abstract: A fixing device includes a fixing belt, a pressuring member, a heating member, a voltage applying part, a current detecting part, a moving member, a driving mechanism and a controlling part. The voltage applying part applies a heating voltage for heating the fixing belt to the heating member. The current detecting part detects current flowing through the heating member. The moving member is movable between a first position where the current becomes a first value and a second position where the current becomes a second value. The driving mechanism moves the moving member from the first position to the second position in conjunction with a rotation stop of the fixing belt. The controlling part stops the voltage applying part from applying the heating voltage to the heating member in conjunction with a change of the current from the first value to the second value.

Abstract: A fixing device includes a fixing belt, a pressuring rotation body, a drive source, a heat source, detected members, rotation detecting parts, a storing part and a controlling part. The storing part stores standard condition for occurrence difficulty of a slip between the fixing belt and detected members co-rotated with rotation of the fixing belt. The controlling part stops heating of the fixing belt by the heat source on a condition that both rotation detecting parts do not detect the rotation of the detected members within a first time when the drive source rotates the fixing belt in a situation unsatisfying the standard condition. The controlling part stops the heating on a condition that at least one of the rotation detecting parts does not detect the rotation of the detected members within a second time when the drive source rotates the fixing belt in a situation satisfying the standard condition.

Abstract: A fixing device includes a fixing belt, a pressuring rotation body, a drive source, a heat source, detected members, rotation detecting parts, a storing part and a controlling part. The storing part stores standard condition for occurrence difficulty of a slip between the fixing belt and detected members co-rotated with rotation of the fixing belt. The controlling part stops heating of the fixing belt by the heat source on a condition that both rotation detecting parts do not detect the rotation of the detected members within a first time when the drive source rotates the fixing belt in a situation unsatisfying the standard condition. The controlling part stops the heating on a condition that at least one of the rotation detecting parts does not detect the rotation of the detected members within a second time when the drive source rotates the fixing belt in a situation satisfying the standard condition.

Abstract: An insulator structure of a motor, includes: a stator core having a plurality of protruding tooth portions which are disposed along an inner periphery of the stator core or an outer periphery of the stator core; a pair of first and second insulators respectively mounted to a first end portion and a second end portion in an axial direction of the stator core, wherein a plurality of cover portions are provided for each of the pair of the first and second insulators so as to cover the plurality of the respective tooth portions; and a winding wound around a tooth portion of the tooth portions covered with the respective cover portions, the winding being capable of causing a magnetic force to the tooth portion by an energizing; wherein with the pair of the first and second insulators, the cover portion's second head end portion in an axial direction of the first insulator in the axial direction and the cover portion's first head end portion in an axial direction of the second insulator in the axial direction mate