Head-Up Display Mirror Assembly for Easier Housing Integration
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Solution Overview
Problem
The existing head-up displays require complex assembly processes due to the fixed configuration of the bearing member to the housing, complicating the task of fixing the mirror to the housing.
Innovation Solution
A head-up display design featuring a mirror with a shaft as a rotary axis, a bearing member that allows rotational movement, a torsion spring urging the mirror in a predetermined direction, and a housing that accommodates these components, with the torsion spring disposed opposite to the mirror and the bearing member, and a protrusion on the bearing member for easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bearing member is fixed to the housing in a conventional configuration, then the mirror can be held rotatably, but the assembly process becomes complex and difficult
Solution Approach 1:
The patent combines the bearing member and housing into an integrated structure where the bearing member is formed as an integral part of the housing. This merging eliminates the need for separate fixation steps and reduces assembly complexity while maintaining the rotational holding function.
Solution Approach 2:
The housing is designed to serve multiple functions: it provides structural support, accommodates the mirror assembly, and directly forms the bearing member for rotational support. This multi-functionality reduces the number of separate components and simplifies the overall assembly process.
2Reliability
If the bearing member is fixed securely to the housing, then the mirror stability is improved, but the assembly task becomes more complicated
Solution Approach 1:
By merging the bearing member with the housing structure, the patent achieves secure fixation and mirror stability without requiring separate assembly steps for fixing the bearing member. The integrated design maintains reliability while improving ease of manufacture.
3Ease of operation
If the torsion spring is disposed on the opposite side to the mirror, then the mirror can be urged in a predetermined rotational direction, but the space requirement increases
Solution Approach 1:
The torsion spring is positioned in the radial dimension of the bearing member rather than occupying additional axial space. This dimensional arrangement allows the spring to exert rotational urging force while maintaining a compact housing volume.
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
Facilitates easy assembly of the mirror to the housing by allowing it to be rotatably held by the bearing member, enhances durability through increased rigidity, reduces vibration and display shake, and allows for versatile gear attachment and posture detection.
Implementation Method 1
a torsion spring through which the shaft penetrates and which urges the mirror in a predetermined rotational direction of the rotary axis with respect to the bearing member
Data Source
AI summary
A head-up display includes a mirror body, a mirror having a shaft serving a rotary axis, a bearing member which holds the shaft of the mirror to be rotatable, a torsion spring through which the shaft penetrates and which urges the mirror in a predetermined rotational direction of the rotary axis with respect to the bearing member, and a housing which accommodates the mirror, the bearing member, and the torsion spring. The torsion spring is disposed on an opposite side opposite to the mirror with respect to the bearing member. The bearing member includes a protrusion to which one end of the torsion spring is hung. The housing includes a depressed portion fitted to the bearing member to fix the bearing member.