Three-Body Hinge Mechanism With Self-Locking and End-Stroke Damping
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Solution Overview
Problem
Existing mobile terminals, such as notebook computers and tablets, require improved hinge mechanisms that enable independent movement, linkage, and damping functions for stable support across various opening angles.
Innovation Solution
A hinge design featuring a rotating shaft with cam structures and a damper mechanism, including a clutch, damping oil, and spring components, allowing for independent rotation and self-locking with buffering at the end of the rotating stroke, enabling smooth opening and closing with stable support across a range of angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge mechanism is designed to enable independent movement and linkage of multiple rotating bodies, then the functionality and adaptability are improved, but the device complexity increases
Solution Approach 1:
The hinge is divided into multiple independent rotating components (first rotating component, second rotating component, third rotating component) that can independently rotate around the rotating shaft. Each component has its own cam structure, allowing them to function independently or in linkage based on design requirements, thus achieving versatility without requiring a completely separate mechanism for each function.
Solution Approach 2:
The hinge mechanism is designed to support multiple functions within a single structure: independent rotation of multiple bodies, linkage movement through cam cooperation, self-locking through the clutch mechanism, and damping through the damper. This multi-functional design achieves high adaptability while avoiding the need for multiple separate mechanisms.
2Reliability
If a damper is connected to the rotating shaft throughout the rotation stroke, then the damping function is continuously provided, but the ease of operation deteriorates due to resistance during movement
Solution Approach 1:
The connection between the damper and rotating shaft is made dynamic rather than static. The clutch mechanism enables the damper to be connected to the rotating shaft only when needed (at the end of the rotation stroke), and disconnected during the main rotation phase. This dynamic connection allows the system to switch between free rotation and damped rotation based on operational requirements.
Solution Approach 2:
The damper engagement occurs periodically at specific phases of the rotation cycle. The clutch mechanism is designed to engage the damper only when the rotating component approaches the end of its stroke, allowing smooth operation during most of the rotation while providing damping protection at critical moments.
3Adaptability or versatility
If multiple cam structures are added to achieve linkage function, then the adaptability is improved, but the manufacturing complexity increases
Solution Approach 1:
Multiple cam structures are merged into a single integrated cam component rather than using separate cams for each rotating body. The cam is designed with multiple interaction surfaces that can cooperate with different rotating components simultaneously, achieving linkage functionality while reducing the number of discrete parts that need to be manufactured and assembled.
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 hinge provides a simple structure for easy assembly, supports independent rotation and linkage of multiple bodies, achieves self-locking, and offers damping and buffering, making it suitable for devices like two-in-one notebook computers with detachable brackets, ensuring stable support during use.
Implementation Method 1
the hinge is further provided with a damper, and the damper is connected with the rotating shaft by a clutch mechanism
Implementation Method 2
damping oil is disposed between the shaft and the connecting housing
Implementation Method 3
The hinge is further provided with a spring for applying a thrust to the second cam in the direction of the slide cam
Implementation Method 4
the first rotating bracket is connected to a friction sleeve that is sleeved outside the rotating shaft, and the friction sleeve cooperates with the rotating shaft to provide a function for the first rotating bracket to stop rotating and maintain a rotation angle at any time
Data Source
AI summary
The present utility model discloses a hinge for rotating part, and the hinge comprises a first cam, a second cam, a fixed cam, a slide cam, a spring and a damper, and further discloses a mobile terminal that uses the hinge. The hinge for rotating part provided in the present utility model has the advantages of simple structure and easy assembling. It can be connected with a third rotating body in addition to two relatively rotatable bodies, and can achieve independent rotation and linkage of the second rotating body and the third rotating body according to the designed rotation procedure as required and achieve self-locking of hinge, and the third rotating body can be damped and buffered at the end of the rotating stroke. The hinge of the present utility model can be applied to the connection of various three rotating bodies, especially suitable for the connection of bracket, keyboard and screen in the mobile terminal. It is easy to open and close and it can provide stable support when the mobile terminal is within the range of opening angles.