Lockable Rotation Shaft Assembly for Synchronous and Independent Motion
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Solution Overview
Problem
Existing rotation shaft assemblies in electronic devices cannot facilitate simultaneous joint movement and independent rotation of multiple members, making them inconvenient for users and difficult to assemble.
Innovation Solution
A rotation shaft assembly with a pivot assembly including a common rotation shaft, a lock member, and connection members that allow synchronous and independent rotation, simplifying assembly and enhancing user experience by enabling relative positional stability between connected members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional rotation shaft assembly is used to connect multiple members, then the structure is simple, but it cannot realize synchronous or independent rotation of multiple members
Solution Approach 1:
The lock member is designed to be movable between different positions (locked and unlocked states), allowing the rotation shaft assembly to dynamically switch between synchronous rotation mode (when locked) and independent rotation mode (when unlocked). This dynamic mechanism enables a single assembly to adapt to different rotation requirements without requiring multiple separate assemblies.
Solution Approach 2:
The rotation shaft assembly is segmented into multiple independent connection members (first connection member, second connection member, third connection member) that can be independently controlled. Each connection member can be selectively locked or unlocked through the lock member mechanism, allowing flexible control over which members rotate together and which rotate independently.
2Ease of operation
If multiple members are connected through a rotation shaft assembly, then joint movement is achieved, but independent rotation of individual members is not possible
Solution Approach 1:
The lock member is designed to be automatically actuated by the relative movement between connection members. When connection members attempt to rotate independently, the lock member automatically engages or disengages based on their relative positions, eliminating the need for external control mechanisms or complex actuation systems.
Solution Approach 2:
The lock member serves as an intermediary element between the connection members, mediating their interaction. It translates the relative movement between connection members into synchronous or independent rotation modes, providing a simple mechanical mediation that enables flexible rotation control without requiring complex control systems.
3Adaptability or versatility
If a rotation shaft assembly allows independent rotation of members, then operational flexibility is improved, but assembly stability may be compromised
Solution Approach 1:
The lock member is designed as a simple, easily replaceable mechanical element that provides stable connection when engaged. Its simplicity allows for reliable mechanical engagement that ensures connection stability during synchronous rotation, while its easy design enables straightforward assembly and disassembly when independent rotation is needed.
Data Source
AI summary
A rotation shaft assembly includes a pivot assembly including a common rotation shaft, and a lock member, a first connection member, a second connection member, and a third connection member disposed at the common rotation shaft. The first connection member, the second connection member, and the third connection member are configured to be connected to a first member, a second member, and a third member, respectively. The lock member has a locked state that enables the first connection member and the second connection member to rotate synchronously, and an unlocked state that enables the first connection member and the second connection member to rotate independently with respect to each other.