US 10,120,308 B2Granted

Image heating device

AssigneeCanon Kabushiki Kaisha

InventorsTakaaki Akamatsu, Masashi Tanaka, Kensuke Umeda, Shoichiro Ikegami, Sho Taguchi, Ai Suzuki

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Abstract

An image heating device includes a rotator, a heater including a heat generating resistor, a connector electrically connected to the heater, and a power interrupting unit that detects an abnormal temperature rise of the heater and interrupt supply of the power to the heater. The power interrupting unit includes a first terminal and a second terminal, a first conductive sheet metal that electrically connects the connector to the first terminal, a second conductive sheet metal that to electrically connects the connector to the second terminal via the heat generating resistor, a length of the second conductive sheet metal being different from a length of the first conductive sheet metal in the longitudinal direction of the heater, and a supporting member supporting the heater and including a regulation portion that regulates rotation of the power interrupting unit.

Claims19

Dependent claims

An image heating device heating an image on a recoding medium, the image heating device comprising:

a rotator;
a heater having an elongated and plate-like shape, configured to heat the rotator, the heater including a heat generating resistor that generates heat by receiving power, wherein the image formed on the recording medium is heated with heat from the heater via the rotator;
a connector electrically connected to one of longitudinal end portions of the heater to supply the power to the heater;
a power interrupting unit configured to interrupt supply of the power to the heater in response to an abnormal temperature rise of the heater, the power interrupting unit including a first electrical terminal which extends in a direction away from the connector in a longitudinal direction of the heater and a second electrical terminal which extends in a direction approaching the connector in the longitudinal direction of the heater;
a first conductive sheet metal that electrically connects the connector to the first electrical terminal, the first conductive sheet metal extending in the longitudinal direction of the heater;
a second conductive sheet metal that electrically connects the connector to the second electrical terminal, the second conductive sheet metal extending in the longitudinal direction of the heater, a length of the second conductive sheet metal in the longitudinal direction of the heater being shorter than a length of the first conductive sheet metal in the longitudinal direction of the heater;
and
a regulation portion configured to regulate rotation of the power interrupting unit about a rotational axis crossing a surface of the heater.

5 more elements

An image heating device heating an image on a recoding medium, the image heating device comprising:

a rotator;
a heater having an elongated and plate-like shape, configured to heat the rotator, the heater including a heat generating resistor that generates heat by receiving power, wherein the image formed on the recording medium is heated with heat from the heater via the rotator;
a connector electrically connected to one of longitudinal end portions of the heater to supply the power to the heater;
a power interrupting unit configured to interrupt supply of the power to the heater in response to an abnormal temperature rise of the heater, the power interrupting unit including a first electrical terminal which extends in a direction away from the connector in a longitudinal direction of the heater and a second electrical terminal which extends in a direction approaching the connector in the longitudinal direction of the heater;
a first conductive sheet metal that electrically connects the connector to the first electrical terminal, the first conductive sheet metal extending in the longitudinal direction of the heater;
a second conductive sheet metal that electrically connects the connector to the second electrical terminal, the second conductive sheet metal extending in the longitudinal direction of the heater, a length of the second conductive sheet metal in the longitudinal direction of the heater being shorter than a length of the first conductive sheet metal in the longitudinal direction of the heater;
and
a regulation portion configured to regulate a movement of the power interrupting unit, the regulation portion facing a second connecting portion of the second conductive sheet metal to which the second electrical terminal is connected, the regulation portion being arranged between the second connecting portion of the second conductive sheet metal and the first conductive sheet metal.

5 more elements

An image heating device heating an image on a recoding medium, the image heating device comprising:

a rotator;
a heater having an elongated and plate-like shape, configured to heat the rotator, the heater including a heat generating resistor that generates heat by receiving power, wherein the image formed on the recording medium is heated with heat from the heater via the rotator;
a connector electrically connected to one of longitudinal end portions of the heater to supply the power to the heater;
a power interrupting unit configured to interrupt supply of the power to the heater in response to an abnormal temperature rise of the heater, the power interrupting unit including a first electrical terminal which extends in a direction away from the connector in a longitudinal direction of the heater and a second electrical terminal which extends in a direction approaching the connector in the longitudinal direction of the heater;
a first conductive sheet metal that electrically connects the connector to the first electrical terminal, the first conductive sheet metal extending in the longitudinal direction of the heater;
a second conductive sheet metal that electrically connects the connector to the second electrical terminal, the second conductive sheet metal extending in the longitudinal direction of the heater, a length of the second conductive sheet metal in the longitudinal direction of the heater being shorter than a length of the first conductive sheet metal in the longitudinal direction of the heater;
and
a regulation portion configured to regulate a movement of the power interrupting unit, the regulation portion facing a first connecting portion of the first conductive sheet metal to which the first electrical terminal is connected, the regulation portion being arranged between the first connecting portion of the first conductive sheet metal and one end of the heater closer to the second conductive metal sheet than the other end of the heater in a width direction of the heater perpendicular to both the longitudinal direction of the heater and a thickness direction of the heater.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/647,062Filed 11 Jul 2017
Priority: JP 2016-14300821 Jul 2016
Published: US 2018/0024478 A125 Jan 2018
Granted: 6 Nov 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G03G 15/2039
Using contact heat: with means for controlling the fixing temperature
G03G 15/2042
With means for controlling the fixing temperature: specially for the axial heat partition
G03G 15/5004
Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode…:…
G03G 15/55
Apparatus for electrographic processes using a charge pattern: self-diagnostics; Malfunction or lifetime display

Family

US 2018/0024478 A1Pre-grant publication · published 25 Jan 2018
US 10,120,308 B2This patent

From the US filing history. Foreign family members aren’t listed.

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