Heating device, fixing device, image forming apparatus
The heating device enhances temperature detection accuracy by using a temperature detection member with a specific spring configuration that stabilizes the position of the detection element, addressing the issue of positional deviations in existing systems.
Patent Information
- Application Number
- JP2021127358
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2021-07-27
- Filing Date
- 2021-08-03
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2041-08-03
AI Technical Summary
Existing temperature detection systems in heating devices, such as fixing devices in image forming equipment, suffer from reduced detection accuracy due to positional deviations of the temperature detection element.
The proposed solution involves a heating device with a temperature detection member that includes a temperature detection element, a first spring member with a surface to press the element, a holder for the first spring member, and one or more second spring members that pressurize the holder towards the temperature detection element side. The spring constant of the first spring member is equal to or greater than the integrated value of the spring constant of the second spring members.
This configuration improves the detection accuracy of the temperature detection member by stabilizing the position of the temperature detection element, thereby reducing errors caused by positional deviations.