Foldable Screen Coupling Mechanism for Wrinkle-Free Frame Motion
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Solution Overview
Problem
Foldable screens in terminal equipment often develop wrinkles due to differences in the length of the front and back surfaces when folded, leading to potential damage and impaired functionality.
Innovation Solution
A coupling device with a middle frame fixing member, first and second transmission assemblies, and a third transmission assembly that converts rotational motion into linear motion, ensuring the middle frame moves to compensate for length differences and prevent wrinkles during folding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hinge is arranged to couple two middle frames for foldable screen function, then the screen can be folded, but wrinkles are formed in the screen due to length difference between front and back surfaces
Solution Approach 1:
The patent applies dynamics by introducing a transmission mechanism that converts the static hinge rotation into dynamic linear motion of the middle frame. The first transmission assembly converts rotational motion of the hinge into linear motion along the first direction, while the second transmission assembly converts it into linear motion along the second direction. This dynamic adjustment compensates for the length difference between front and back surfaces during folding, preventing screen wrinkles while maintaining foldability.
2Object-affected harmful factors
If the middle frame is allowed to move freely during folding, then screen wrinkles may be reduced, but alignment precision and folding control are compromised
Solution Approach 1:
The patent uses transmission assemblies as intermediary mechanisms between the hinge and the middle frame. These assemblies act as mediators that control and regulate the middle frame's movement during folding. The first and second transmission assemblies translate hinge rotation into controlled linear motions, ensuring the middle frame moves precisely to compensate for surface length differences without compromising alignment precision or folding control.
Solution Approach 2:
The patent changes the motion parameters of the middle frame during folding by converting rotational motion into linear motion through transmission assemblies. This parameter transformation allows precise control over the middle frame's position and movement trajectory, ensuring accurate compensation for surface length differences while maintaining manufacturing precision and alignment requirements.
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 prevents wrinkles and extends the lifespan of the screen by accurately managing the folding process, ensuring proper alignment and minimizing stress on the screen.
Implementation Method 1
a second transmission assembly having a first end hinged to the first transmission assembly at a first hinge center and having a second end slidably coupled to the first transmission assembly. A rotation center of the first transmission assembly does not coincide with the first hinge center, and the second transmission assembly converts a rotation action of the first transmission assembly into a moving action along a second direction
Implementation Method 2
a third transmission assembly having a first end hinged to the second transmission assembly and having a second end and a third end both slidably coupled to the middle frame fixing member. The second end and the third end of the third transmission assembly are on two sides of the first end of the third transmission assembly, and the third end of the third transmission assembly pushes the middle frame fixing member to move towards a first side facing away from the first transmission assembly or a second side towards the first transmission assembly during the rotation of the middle frame fixing member
Data Source
AI summary
A terminal device with a folding screen includes a coupling device with a middle frame fixing member, a first transmission assembly, a second transmission assembly and a third transmission assembly. A first transmission assembly is rotatable relative to the middle frame fixing member during rotation of the middle frame fixing member. The second transmission assembly has a first end hinged to the first transmission assembly and a second end slidably coupled to the first transmission assembly, and the second transmission assembly converts a rotation action of the first transmission assembly into a moving action along a second direction. A third end of the third transmission assembly pushes the middle frame fixing member to move towards a first side facing away from the first transmission assembly or a second side towards the first transmission assembly during the rotation of the middle frame fixing member.