Air Conditioning Register Stopper Inclination Angle
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Solution Overview
Problem
Air conditioning registers generate abnormal noise when the fork contacts the stopper due to the displacement of the operation knob, causing discomfort to users.
Innovation Solution
The air conditioning register design includes a transmission shaft with stoppers that have an inclined surface with an inclination angle between 9° and 14°, preventing further displacement of the fork and reducing noise by ensuring effective regulation of the operation knob's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the stopper is designed with a vertical surface perpendicular to the transmission shaft axis, then the structure is simple, but abnormal noise is generated when the transmission piece contacts the stopper
Solution Approach 1:
The invention changes the geometric parameter of the stopper surface from vertical (perpendicular to shaft axis) to inclined (at 5-15 degrees relative to perpendicular). This parameter modification allows the transmission piece to gradually contact the stopper surface, reducing impact noise while maintaining structural simplicity and ease of manufacture.
2Object-affected harmful factors
If the inclination angle of the stopper surface is less than 9°, then the abnormal noise is reduced, but the stopper cannot effectively regulate the displacement of the fork
Solution Approach 1:
The invention identifies and optimizes the inclination angle parameter within the range of 5-15 degrees. This specific parameter range balances two competing requirements: reducing abnormal noise through gradual contact while maintaining sufficient mechanical advantage to effectively regulate fork displacement. The optimal angle ensures both noise reduction and reliable position regulation.
3Reliability
If the inclination angle of the stopper surface is greater than 14°, then the fork displacement is effectively regulated, but abnormal noise increases causing user discomfort
Solution Approach 1:
The invention establishes the upper bound of the inclination angle at 15 degrees (with optimal range 5-15 degrees). This parameter constraint prevents excessive inclination angles that would cause the transmission piece to contact the stopper too abruptly, thereby eliminating abnormal noise while preserving effective fork displacement regulation within the specified range.
Data Source
AI summary
An air conditioning register includes: a downstream side fin; an upstream side fin; an operation knob; and a fork including a pair of transmission pieces, and connected to the operation knob. A transmission shaft is provided in the upstream side fin, and is interposed between the pair of transmission pieces. The transmission shaft is provided with a stopper that regulates further displacement of the fork. A surface of the stopper is an inclined surface that is inclined with respect to a center axis of the transmission shaft so as to be located outside in a radial direction centering on the center axis of the transmission shaft as approaching an end of the transmission shaft. An inclination angle of the inclined surface with respect to the center axis of the transmission shaft is an angle equal to or greater than 9° and equal to or less than 14°.