Power Inlet Support Structure for Stable Grounding in Image Forming
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Solution Overview
Problem
The increased distance between the power inlet and power supply unit in image forming apparatuses leads to unstable ground potential, causing noise in the electric power supply and affecting the stable operation of other electric component portions.
Innovation Solution
The power inlet is fixed to a board support member through an inlet support member, which is in turn fixed to the power supply unit, ensuring a stable ground potential and reducing noise in the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the power inlet is arranged far from the power supply unit, then the cable length can be reduced, but the ground potential becomes unstable causing noise
Solution Approach 1:
The support structure is divided into two separate members: a power inlet support member and a power supply support member. This segmentation allows each member to be independently positioned and fixed to the casing, enabling the power inlet and power supply unit to be arranged close together for stable ground potential while allowing flexible cable routing.
Solution Approach 2:
The power inlet support member acts as an intermediary component that fixes the power inlet to the casing. This intermediary structure enables the power inlet to be positioned close to the power supply unit, stabilizing the ground potential, while simultaneously providing a mounting point for the cable to reach the power inlet from the power supply unit.
2Device complexity
If the power inlet is fixed directly to the casing, then the structure is simple, but the ground potential becomes unstable when distance from power supply unit increases
Solution Approach 1:
The support function is segmented into two independent components: a power inlet support member and a power supply support member. Each member can be separately fixed to the casing, allowing the power inlet to be positioned close to the power supply unit for stable ground potential while keeping the overall structure relatively simple and modular.
Solution Approach 2:
The power inlet support member serves as an intermediary that bridges the power inlet and the casing. This intermediary component enables stable grounding by positioning the power inlet close to the power supply unit, while the modular design keeps the support structure simple and easy to implement.
Data Source
AI summary
An image forming apparatus includes a power supply fixed to a casing, a power inlet configured to supply, to the power supply, electric power supplied from an outside via a power cord, and an inlet support member to which the power inlet is fixed, wherein the power supply includes an electric board configured to be supplied with the electric power from the power inlet, and a board support member configured to support the electric board, and wherein the power inlet is fixed to the board support member through intermediation of the inlet support member.