Tension Arm Lighting Assembly for Free-Stop Height Adjustment
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Solution Overview
Problem
Existing multi-joint lighting devices face challenges in installation and position control, particularly in spaces with low ceilings, where three-axis arms are difficult to install and two-axis arms offer limited control due to restricted rotational degrees of freedom, and attached controllers or displays become inconvenient during vertical height adjustments.
Innovation Solution
A multi-joint lighting device with a tension arm assembly that connects the head arm assembly and base arm assembly, allowing for tilting and rotation, and includes a slip ring module for maintaining electrical connections, along with a gyro sensor and image controller for maintaining a constant display angle, enabling free-stop height adjustment and convenient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a three-axis arm is used to provide three rotational degrees of freedom for convenient position control, then the position control convenience is improved, but the device cannot be installed in spaces with low ceilings
Solution Approach 1:
The arm assembly is divided into multiple segments (first arm assembly and second arm assembly) connected by a tension arm. This segmentation allows the system to achieve complex positioning with reduced individual segment lengths, enabling installation in low-ceiling spaces while maintaining position control convenience through the combined rotational degrees of freedom of multiple segments.
2Length of moving object
If a two-axis arm is used to enable installation in low-ceiling spaces, then the installability is improved, but the position control is limited due to only two rotational degrees of freedom
Solution Approach 1:
The patent merges a first arm assembly with a second arm assembly through a tension arm connection, combining their rotational capabilities. This merging provides more than two rotational degrees of freedom (adding the head arm assembly's rotation), thereby improving position control convenience while maintaining the compact structure suitable for low-ceiling installation.
3Adaptability or versatility
If a controller or display is attached to the arm to provide control functions, then the control functionality is improved, but the controller angle changes inconveniently with vertical height adjustment
Solution Approach 1:
The display unit is designed to rotate relative to the head arm assembly, making it a dynamic component rather than a fixed one. This dynamic configuration allows the display angle to be independently adjusted and maintained at a convenient viewing angle regardless of the vertical height adjustment of the lighting unit, thereby maintaining control functionality while ensuring operational convenience.
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 device allows for flexible height adjustment and convenient position control even in low-ceiling spaces, maintaining a constant display angle and ensuring easy operation by compensating for self-loads through tension and using a tension arm assembly for free-stop height adjustment.
Implementation Method 1
a tension providing unit disposed parallel to the support unit and configured to provide the tension compensating for self-loads of the head arm assembly and the lighting unit according to a tilting angle of the head arm assembly
Implementation Method 2
an elastic member disposed to surround a circumference of a portion of the shaft core and formed to have elasticity to provide resistance against a compressive force
Implementation Method 3
a gyro sensor configured to sense an angle of the display unit relative to the direction of gravity
Data Source
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AI summary
A multi-joint lighting device including a tension arm assembly according to the present invention includes a lighting unit including a light emission module configured to radiate light toward a target, a head arm assembly connected to the lighting unit, a base arm assembly connected to a settling base fixed to a predetermined settling point, and a tension arm assembly having one side tiltably connecting the head arm assembly and the other side tiltably connected to the base arm assembly and providing tension compensating for self-loads of the head arm assembly and the lighting unit according to a tilting angle of the head arm assembly to implement a free-stop height adjustment operation of the lighting unit.