Headrest Moving Device Contact Assisting Member Noise Reduction
Solution Overview
Problem
Existing headrest moving devices experience noise and inefficient power transmission during forward and reverse rotation due to gear issues.
Innovation Solution
A headrest moving device with a screw, nut part, and a contact assisting member, such as a set screw, that closely contacts the gear components to reduce friction and noise, and includes a worm gear configuration to minimize volume and weight while enhancing power transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple gears are used in the deceleration unit for power transmission, then the power transmission capability is improved, but noise is generated during forward and reverse rotation
Solution Approach 1:
A contact assisting member is introduced as an intermediary element between the first gear and the second gear. This member includes a contact assisting surface that closely contacts both gears, ensuring stable engagement and reducing noise during power transmission while maintaining the multi-gear deceleration function
Solution Approach 2:
The contact assisting member is designed to be movable along the gear rotation axis, allowing it to dynamically adjust its position to maintain optimal contact with both gears during operation, thereby ensuring consistent noise reduction and power transmission
2Power
If multiple gears are used in the deceleration unit, then the reduction ratio is improved, but power transmission smoothness deteriorates
Solution Approach 1:
The contact assisting member acts as a mediator that closely connects the first gear and the second gear through its contact assisting surfaces, ensuring smooth power transmission across the gear interface while maintaining the required reduction ratio
Solution Approach 2:
The contact assisting surfaces are designed with specific geometric parameters (inclination angles, curvature radii) that optimize the engagement between gears, changing the interaction parameters to achieve both high reduction ratio and smooth power transmission
3Object-generated harmful factors
If the contact assisting member is added to closely contact the gears, then noise is reduced and power transmission is smoothed, but the device complexity increases
Solution Approach 1:
The contact assisting member is designed to perform multiple functions simultaneously: it reduces noise, smooths power transmission, and can be integrated with existing gear structures. The member may also serve as a positioning or support element, combining multiple functions in a single component to minimize overall complexity
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 effectively reduces noise and ensures smooth power transmission during headrest movement by adjusting frictional forces and modularizing the gear system, while also reducing the device's volume and weight.
Implementation Method 1
a contact assisting member for closely contacting the first gear with the second gear
Implementation Method 2
a screw; a nut part thread-coupled to the screw
Implementation Method 3
The first gear is provided as a worm, and the second gear may be provided as a worm gear
Data Source
AI summary
The present invention relates to a headrest moving device, more particularly, relates to a headrest moving device provided with a contact assisting member for closely contacting two members engaged with each other for moving the headrest so that power can be smoothly transmitted, the noise can be reduced during the movement on the headrest.