Scanning Optical Device Cable Harness Routing
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Solution Overview
Problem
The existing scanning optical devices face an issue with increased wiring length due to the arrangement of signal-supplying boards, which affects the efficiency and compactness of the device.
Innovation Solution
The cable harness is rerouted to extend from the motor circuit board towards the semiconductor laser side, overlapping with the light beam, thereby reducing the wiring length and avoiding interference with the optical path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the cable harness extends from the motor circuit board to the opposite side of the light source with respect to the polygon mirror, then the wiring length increases, but the board can be arranged on the light source side
Solution Approach 1:
The cable harness is routed through the third direction (perpendicular to both the rotation axis direction and the light beam direction) to reach the laser circuit board. This three-dimensional routing approach allows the cable harness to extend toward the semiconductor laser side without interfering with the optical path, effectively reducing wiring length while maintaining proper board arrangement
Solution Approach 2:
The spatial arrangement is segmented into distinct directional zones: the first direction for the rotation axis, the second direction for the light beam propagation, and the third direction for cable harness routing. This segmentation allows each component to occupy its designated spatial zone without interference, resolving the contradiction between wiring length and arrangement complexity
2Length of moving object
If the cable harness is routed to reduce wiring length by extending toward the semiconductor laser side, then the wiring length decreases, but the cable harness may obstruct the light beam
Solution Approach 1:
The cable harness is positioned in the third direction, which is perpendicular to both the rotation axis (first direction) and the light beam direction (second direction). This dimensional separation ensures that the cable harness extends toward the semiconductor laser side to reduce wiring length while passing through space that does not intersect with the light beam path, thereby avoiding obstruction
Solution Approach 2:
The third direction serves as an intermediary spatial zone that mediates between the need for short wiring (extending toward the laser) and the need to avoid light beam obstruction. By routing the cable harness through this intermediate dimensional space, both requirements are satisfied simultaneously
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 configuration reduces the overall wiring length and enhances the compactness of the scanning optical device by effectively utilizing the available space, while ensuring the cable harness does not obstruct the light beam.
Implementation Method 1
a coupling lens 20 configured to convert light emitted by the semiconductor laser 10 into light beam
Implementation Method 2
a polygon mirror 51 configured to deflect light beam converted by the coupling lens 20
Data Source
AI summary
A scanning optical device includes a semiconductor laser, a coupling lens, a polygon mirror, a motor circuit board, a cable harness, and a scanning optical system. The semiconductor laser is configured to emit light. The coupling lens is configured to convert the light emitted by the semiconductor laser into a light beam. The polygon mirror is configured to deflect the light beam converted by the coupling lens. The motor circuit board includes a motor configured to rotate the polygon mirror. The cable harness is configured to supply signals to the motor circuit board. The scanning optical system is configured to receive the light beam from the polygon mirror and to form an image on an image surface. The cable harness overlaps the light beam directed from the coupling lens toward the polygon mirror when viewed from an axial direction of a rotation axis of the polygon mirror.