Interference-Fit Damping Assembly for Thin Foldable Hinges
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Solution Overview
Problem
Existing foldable terminals with rotating mechanisms and damping assemblies are complex in structure and occupy a large space, hindering lightweight and thin design goals.
Innovation Solution
A damping assembly with a simple structure that includes a damping section and shaft sleeve, utilizing interference fits between damping parts and shaft sleeve parts to provide damping force, with varying interference amounts to maintain consistent damping force throughout the assembly's life cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing damping assemblies are used to provide damping force, then damping function is achieved, but structure becomes complex and space occupation increases
Solution Approach 1:
The patent combines the damping section and shaft sleeve into a single integrated damping assembly. The shaft sleeve is directly sleeved on the damping section with interference fits, eliminating the need for separate damping mechanisms. This merging of components achieves the damping function while significantly simplifying the overall structure and reducing space occupation.
Solution Approach 2:
The shaft sleeve is nested directly on the damping section through interference fits at different positions. The first shaft sleeve part is sleeved on the first damping part, and the second shaft sleeve part is sleeved on the second damping part, creating a nested structure where the shaft sleeve contains the damping section. This nesting approach compactly integrates multiple functions into a small space.
2Reliability
If existing damping assemblies are used to provide damping force, then damping function is achieved, but space occupation increases hindering thin design
Solution Approach 1:
The shaft sleeve is nested directly on the damping section through interference fits at different positions. The first shaft sleeve part is sleeved on the first damping part, and the second shaft sleeve part is sleeved on the second damping part, creating a nested structure where the shaft sleeve contains the damping section. This nesting approach compactly integrates multiple functions into a small space.
Solution Approach 2:
The patent uses different interference amounts at different positions along the axial direction. The first interference amount between the first shaft sleeve part and first damping part differs from the second interference amount between the second shaft sleeve part and second damping part. This parameter variation optimizes the damping force distribution while maintaining a compact structure.
3Ease of manufacture
If uniform interference amount is used throughout the damping assembly, then manufacturing is simplified, but damping force consistency deteriorates over the assembly's life cycle
Solution Approach 1:
The patent applies different interference amounts at different local positions along the axial direction. The first interference amount between the first shaft sleeve part and first damping part is different from the second interference amount between the second shaft sleeve part and second damping part. This local quality variation ensures that the damping force remains consistent throughout the assembly's life cycle by compensating for wear at different positions.
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 damping assembly provides a consistent damping experience while occupying a small space, contributing to a lightweight and thin design of foldable terminals.
Implementation Method 1
an interference amount between the first shaft sleeve part and the first damping part is a first interference amount. The second shaft sleeve parts are sleeved onto the second damping parts, and an interference amount between the second shaft sleeve part and the second damping part is a second interference amount
Implementation Method 2
the damping assembly provides a damping force by using a friction force generated between the first damping part and the first shaft sleeve part
Data Source
AI summary
Embodiments of this application provide a damping assembly, a rotating mechanism, and a foldable terminal. The damping assembly has a simple structure and occupies a relatively small space, which is conductive to a lightening and thinning design of a foldable terminal. The damping assembly includes a damping section and a shaft sleeve sleeved onto the damping part, where the damping section includes a first damping part and a second damping part, and the shaft sleeve includes a first shaft sleeve part and a second shaft sleeve part an interference amount between the first shaft sleeve part and the first damping part is a first interference amount; an interference amount between the second shaft sleeve part and the second damping part is a second interference amount, and the second interference amount is less than the first interference amount.