Hinge and Slide Arm Mechanism for Portable Display
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Solution Overview
Problem
Existing opening/closing devices for portable terminal devices face issues with unstable movement and cumbersome operation, particularly due to reliance on single arm members or requiring multiple operations for opening and closing, which affects the usability and portability of the devices.
Innovation Solution
An opening/closing device that incorporates a fixed plate, a moving plate, a slide plate, a hinge arm, a slide arm, and a link arm, allowing the moving plate to rotate and slide between closed and open positions using a single operation, ensuring stability and efficient space utilization by positioning the plates on the same plane when open.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single arm member is used to move the second housing relative to the first housing, then the device complexity is reduced, but the movement becomes unstable due to arbitrary rotation
Solution Approach 1:
The single arm member is divided into multiple arm members (first arm member, second arm member, third arm member) that work together to provide stable movement. Each arm member has specific functions: the first arm member rotates about a first shaft part, the second arm member connects them, and the third arm member rotates about a third shaft part. This segmentation resolves the contradiction by maintaining structural simplicity while achieving stable movement through coordinated multiple components.
Solution Approach 2:
The patent introduces a sliding dimension by providing shaft parts that slide within groove parts. The second shaft part slides in the second groove part, and the fourth shaft part slides in the fourth groove part. This adds a sliding degree of freedom that constrains arbitrary rotation while maintaining relatively simple structure, thus resolving the stability-complexity contradiction.
2Stability of the object's composition
If two operations (sliding and raising/lowering) are required for opening/closing, then the movement control is improved, but the operation becomes troublesome
Solution Approach 1:
The patent merges the sliding operation and raising/lowering operation into a single integrated motion. When the user opens or closes the device, both the sliding of the second housing relative to the first housing and the raising/lowering movement occur simultaneously through the coordinated action of multiple arm members and shaft parts. This eliminates the need for separate operations while maintaining stable movement control.
Solution Approach 2:
The link arm acts as an intermediary that connects the first arm member and the third arm member, coordinating their movements. The link arm ensures that as the first arm member rotates about the first shaft part and the third arm member rotates about the third shaft part, the second housing moves in the correct combined sliding and raising/lowering motion, achieving both control and convenience.
3Weight of moving object
If the second housing is hidden in collapsed state, then the portability is improved, but the liquid crystal display device cannot be used in collapsed state
Solution Approach 1:
The patent creates a dynamic configuration where the second housing can be positioned in multiple states: completely collapsed for portability, partially open for display visibility, and fully open for use. The mechanism allows the second housing to be held at intermediate positions where the liquid crystal display device is visible and usable while maintaining a relatively compact form factor, thus resolving the contradiction between portability and usability.
4Area of stationary object
If the first and second housings are made flat when open, then the space utilization is improved, but the device complexity increases
Solution Approach 1:
The complex motion required to achieve flat configuration is divided among multiple arm members and shaft parts, each with relatively simple individual structures. The first arm member, second arm member, and third arm member each perform specific portions of the motion, and the link arm coordinates them. This segmentation allows the system to achieve the flat configuration for optimal space utilization while keeping individual components simple.
Solution Approach 2:
The patent uses sliding movements in groove parts to achieve the flat configuration more efficiently. The sliding of shaft parts within grooves provides an additional degree of freedom that simplifies the mechanism required to achieve the flat open state, reducing overall complexity while maximizing space utilization.
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 enables smooth and stable movement of the moving plate relative to the fixed plate with a single operation, improving portability and space efficiency by allowing the liquid crystal display device to be used in a closed state and preventing overlap when open, thus enhancing the overall usability of portable terminal devices.
Implementation Method 1
a hinge arm (18) including a first shaft part (A1) rotatably connected to the fixed plate (12), a third shaft part (A3) rotatably connected to the moving plate (14), and a second shaft part (A2) provided between the first shaft part (A1) and the third shaft part (A3)
Implementation Method 2
a slide arm (20) including a fourth shaft part (A4) rotatably connected to the moving plate (14) and a fifth shaft part (A5) connected slidably along the slide groove (16c) of the slide plate (16)
Data Source
Figure 1A~1B
Figure 2
Figure 3A
AI summary
The present invention relates to an opening/closing device including a fixed plate, a moving plate that can be moved relative to the fixed plate, a slide plate that is formed having a slide groove, a hinge arm including a first shaft part rotatably connected to the fixed plate, a third shaft part rotatably connected to the moving plate, and a second shaft part provided between the first shaft part and the third shaft part, and configured to move the moving plate between a closed position and an open position relative to the fixed plate by centrally rotating about the first shaft part, a slide arm including a fourth shaft part rotatably connected to the moving plate and a fifth shaft part connected slidably along the slide groove of the slide plate, and configured to move the moving plate between the closed position and the open position relative to the fixed plate by rotating about the fourth shaft part, a link arm having one end part connected to the second shaft part and another end part connected to the fifth shaft part. The fifth shaft part is configured to slide inside the slide groove as the link arm moves along with the moving of the hinge arm when the moving plate is moved between the closed position and the open position. The moving plate and the fixed plate are positioned substantially on the same plane when the moving plate is moved to the open position.