Insulative Cover for High Voltage Circuit Board Isolation
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Solution Overview
Problem
Image forming apparatuses require a larger size due to the need for increased isolation between the high voltage circuit board and the main frame, resulting in higher production costs and a greater number of components.
Innovation Solution
An insulative member is used to directly fix the high voltage circuit board to the main frame, enhancing insulation and allowing for a reduction in the distance between the two, thereby reducing the size of the apparatus and simplifying the fixing arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gap is provided between the high voltage circuit board and the main frame for isolation, then electrical insulation is ensured, but the size of the apparatus increases
Solution Approach 1:
An insulative member is introduced as an intermediary component between the high voltage circuit board and the main frame. This mediator provides the necessary electrical insulation while allowing the components to be positioned closer together, thus resolving the contradiction between ensuring insulation and reducing apparatus size.
Solution Approach 2:
The insulative member integrates multiple functions: it serves as both the insulation barrier and the fixing member that attaches the high voltage circuit board to the main frame. By combining the insulation function and fixing function into a single component, the apparatus size is reduced while maintaining electrical isolation.
2Stability of the object's composition
If a separate fixing member is provided to attach the high voltage circuit board to the main frame, then secure fixation is achieved, but the number of components increases and production cost rises
Solution Approach 1:
The insulative member combines the fixing function and insulation function into a single integrated component. The fixing members are formed as an integral part of the insulative member, eliminating the need for separate fixing components and reducing overall device complexity while maintaining secure fixation.
Solution Approach 2:
The insulative member serves multiple functions simultaneously: it provides electrical insulation, acts as a structural support, and includes integrated fixing members for attachment. This multi-functionality reduces the total number of components needed in the apparatus.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces the size of the image forming apparatus, decreases the number of components, and lowers production costs by eliminating the need for additional fixing members and reducing the number of components required for electrical connections.
Implementation Method 1
an insulative member provided on a face of the high voltage circuit board opposed to the main frame for electrically isolating the high voltage circuit board from the main frame
Data Source
AI summary
An image forming apparatus (1) according to the present invention includes a main frame (4B) which supports an image forming unit (2). An electric charger (7) is provided as a high voltage unit on a front side (D1) of the main frame (4B), and a high voltage circuit board (14) for applying a high voltage to the electric charger (7) is provided on a rear side (D2) of the main frame (4B) A cover (27) is provided as an insulative member on the high voltage circuit board (14) in opposed relation to the main frame (4B) for electrically isolating the high voltage circuit board (14) from the main frame (4B). The high voltage circuit board (14) is fixed directly to the main frame (4B) by the cover (27), and electrically connected to the electric charger via a resilient connector (25).