Projector Leg Mechanism for Dust-Proof Angle Adjustment
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Solution Overview
Problem
Existing projector leg portions for angle adjustment compromise aesthetic appearance and are prone to dust accumulation due to exposed locking mechanisms, which can lead to dust entering the housing during repeated adjustments.
Innovation Solution
A leg portion design featuring a columnar member, case member, fixing member, and switching member that allows for angle adjustment without exposing the locking mechanism externally, using a screw or rack shape for engagement and a spring to facilitate easy operation while keeping the mechanism sealed within the case member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projecting and depressed portion is exposed after angle adjustment, then the locking function is achieved, but the aesthetic appearance is impaired and dust can enter the housing
Solution Approach 1:
The projecting and depressed portion is extracted from the external housing and relocated to the internal leg portion main body. The locking mechanism operates internally within the housing, with only the leg portion main body extending outward. This separates the aesthetic external surface from the functional locking components, maintaining appearance while preserving reliability.
Solution Approach 2:
The locking mechanism (fixing member with engaging portion) is nested within the housing interior, with the leg portion main body accommodated inside. The engaging portion is positioned along the first direction inside the case member, creating a nested configuration where the locking function is contained within the housing structure rather than exposed externally.
2Reliability
If the projecting and depressed portion is exposed after angle adjustment, then the locking function is achieved, but dust adheres to the exposed portion and enters the housing
Solution Approach 1:
The projecting and depressed portion is extracted from the external housing and relocated to the internal leg portion main body. The locking mechanism operates internally within the housing, with only the leg portion main body extending outward. This separates the aesthetic external surface from the functional locking components, maintaining appearance while preserving reliability.
Solution Approach 2:
The locking mechanism (fixing member with engaging portion) is nested within the housing interior, with the leg portion main body accommodated inside. The engaging portion is positioned along the first direction inside the case member, creating a nested configuration where the locking function is contained within the housing structure rather than exposed externally.
3Adaptability or versatility
If the leg portion main body is projected from the bottom surface for angle adjustment, then the installation angle can be changed, but the external appearance becomes complicated
Solution Approach 1:
The projecting and depressed portion is extracted from the external housing and relocated to the internal leg portion main body. The locking mechanism operates internally within the housing, with only the leg portion main body extending outward. This separates the aesthetic external surface from the functional locking components, maintaining appearance while preserving reliability.
Solution Approach 2:
The leg portion main body is designed with differentiated regions: a smooth external surface portion for aesthetic appearance, and an internal structure containing the locking mechanism. The engaging portion is positioned internally along the first direction, allowing the external surface to maintain simple quality while the internal structure provides adjustment functionality.
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
The solution provides a simple external appearance, prevents dust from entering the projector, and allows for reliable angle adjustments and fine-tuning without compromising the projector's internal cleanliness.
Implementation Method 1
a spring member moving the switching member in a direction in which the fixing member engages with the columnar member
Data Source
AI summary
A projector includes a leg portion adjusting an installation angle of an external housing. The leg portion includes a columnar member moving in a first direction, a case member in which the columnar member is accommodated, a fixing member including an engaging portion along the first direction inside the case member and fixing the columnar member, and a switching member moving in a second direction crossing the first direction and switching the fixing member between a state in which the fixing member moves in a direction toward the columnar member to engage therewith and a state in which the fixing member moves in a direction away from the columnar member to release the engagement therewith. The columnar member includes an engaged portion to be engaged with the engaging portion of the fixing member inside the case member, and a base portion moving in the first direction outside the case member.