Belt-Driven Camera Assembly With Self-Biasing Tension Control
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Solution Overview
Problem
Existing camera assemblies face challenges in maintaining optimal timing belt tension, leading to issues like shaking, malfunction, wear-out, and power reduction due to inadequate tension management, which is costly and requires strict quality controls or additional devices, and is unable to adapt to changes in setting angles or external forces.
Innovation Solution
A camera assembly that uses an elastic member to balance the tension of the timing belt by applying a biasing force, allowing adaptive adjustment of the belt tension without strict clearance management or additional tools, and maintains tension despite changes in the camera assembly's angle or surroundings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If strict quality controls on dimensions and clearances are implemented to maintain timing belt tension, then the tension can be maintained within designed range, but manufacturing cost increases and defective products risk increases
Solution Approach 1:
The movable member is designed to automatically adjust its position along the second axis based on the actual timing belt tension, eliminating the need for manual intervention or complex control systems. The system self-regulates by allowing the movable member to slide to positions that naturally maintain optimal belt tension, thereby reducing manufacturing costs while ensuring reliable operation
Solution Approach 2:
The movable member is designed with dynamic adjustability along the second axis, allowing it to change position in response to varying tension requirements. This dynamic capability enables the system to adapt to different operating conditions and maintain optimal timing belt tension without requiring strict quality controls on component dimensions
2Reliability
If manual adjustment of axial distance is performed during assembling to adjust timing belt tension, then the tension can be adjusted, but additional dedicated devices are required and the process becomes complex
Solution Approach 1:
The movable member automatically adjusts the axial distance between the motor shaft and pulley by sliding along the second axis in response to timing belt tension variations. This self-adjusting mechanism eliminates the need for additional dedicated tensioning devices and simplifies the assembling process, as no manual intervention or special tools are required during assembly
Solution Approach 2:
The support structure is divided into a fixed member and a movable member that can independently adjust along the second axis. This segmentation allows the movable member to specifically handle tension adjustment functions while the fixed member provides stable support, thereby simplifying the overall device complexity
3Ease of repair
If the camera assembly is disassembled and reassembled, then maintenance or replacement can be performed, but the timing belt tension becomes unbalanced due to changes in axial distance
Solution Approach 1:
After disassembly and reassembly, the movable member automatically slides along the second axis to adjust its position, thereby self-correcting any axial distance variations that may have occurred during reassembly. This ensures that the timing belt tension is automatically rebalanced without requiring manual adjustment or special tools, facilitating easy maintenance while maintaining reliable operation
Solution Approach 2:
The position of the movable member along the second axis is allowed to change in response to tension variations caused by disassembly and reassembly. By permitting this parameter change, the system automatically adapts to the new configuration and restores optimal timing belt tension, ensuring reliable operation after maintenance
4Adaptability or versatility
If the setting angle of camera assembly or surrounding conditions change, then the camera can adapt to different environments, but decentering or eccentricity occurs causing timing belt tension deviation
Solution Approach 1:
The movable member is designed with dynamic adjustability along the second axis, allowing it to automatically compensate for decentering or eccentricity that occurs when the camera assembly's setting angle or surrounding conditions change. This dynamic adjustment capability maintains consistent timing belt tension despite variations in operating conditions, ensuring reliable operation across different environments
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 camera assembly effectively maintains timing belt tension within a designed range, reducing defects and enabling easy reassembly, while minimizing tension variations caused by component eccentricities or external forces, ensuring consistent performance.
Implementation Method 1
an elastic member (140) spaced from the second axis Bx and configured to apply a biasing force in a direction in which the first axis Ax is away from the second axis Bx
Data Source
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AI summary
A camera assembly includes: a motor configured to generate a driving power; a motor shaft configured to define a first axis extending from the motor and rotate by the driving power of the motor; a pulley configured to rotate on a second axis spaced from the first axis according to the rotation of the motor shaft; a belt configured to couple the motor shaft and the pulley, and convert the rotation of the motor to the rotation of the pulley; a camera module configured to be mounted on the pulley and rotate together with the pulley; and an elastic member configured to apply a biasing force to the motor shaft such that the motor shaft is away from the second axis.