Projector Foot Adjustment With External Rotation and Image Stability
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Solution Overview
Problem
The existing projector designs with feet that are rotatable via a screw mechanism for adjusting the projector's position on a surface are inconvenient due to the operation position being between the installation surface and the projector's bottom surface, making it difficult to operate the feet effectively.
Innovation Solution
A projector design featuring a foot with a rotational member exposed outside the housing, allowing users to adjust the foot's length from the outside surface by rotating the member, and incorporating a rotation restricting mechanism to prevent the foot from shifting during rotation, ensuring the projector remains stable and the image position is fixed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the feet are made rotatable using a screw mechanism with the operation position between the installation surface and the bottom surface of the outer housing, then the length of projection of the feet can be changed to adjust the projector position, but it becomes difficult to operate the feet and lowers the degree of convenience
Solution Approach 1:
The rotational operation mechanism is extracted from the interior space between the installation surface and the bottom surface, and repositioned to the exterior bottom surface of the housing. This allows users to operate the feet by rotating them directly from the outside, eliminating the need to access internal spaces and significantly improving ease of operation.
Solution Approach 2:
Instead of having the operational interface located internally (between the installation surface and housing bottom), the design inverts the arrangement by placing the rotational operation interface externally on the bottom surface. This inversion transforms an inaccessible internal mechanism into an easily accessible external control.
2Ease of operation
If the rotational member is rotated to change the position of the projector, then the foot main body may rotate in the same direction due to frictional force with the installation surface, causing the projector to shift and the projection image position to shift
Solution Approach 1:
The foot assembly is segmented into distinct functional components: the rotational member for adjustment, the foot main body for support, and the rotation restricting member for stabilization. This segmentation allows the rotational member to be operated independently without causing unwanted rotation of the foot main body, thus maintaining projection image stability during adjustment.
Solution Approach 2:
The rotation restricting member acts as an intermediary between the rotational member and the foot main body. It selectively transmits rotational motion during intentional adjustment while preventing unintended rotation during normal operation, thereby mediating between the need for adjustability and the need for stability.
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 design enhances the convenience of operating the projector by allowing easier adjustment of the foot's position and preventing image shift, thereby improving the projector's usability and maintaining image stability.
Implementation Method 1
the feet are made rotatable with respect to the outer housing by using a screw mechanism so as to change the length of projection of the feet from the bottom surface of the outer housing by rotation of the feet
Implementation Method 2
the projector shifts from the installation surface in the front-rear or left-right direction due to the frictional force produced between the foot main body and the installation surface
Data Source
AI summary
A projector includes: an outer housing which forms an external case; and a foot attached to the outer housing and brought into contact with an installation surface when the projector is placed on the installation surface, wherein the foot includes a foot main body which contacts the installation surface, and a rotational member supported rotatably with respect to the outer housing in such a condition that at least a part of the rotational member is exposed to the outside of the outer housing, and the foot main body engages with the rotational member and shifts in the direction along a rotation axis of the rotational member in accordance with rotation of the rotational member.