Display Case Cam Locking Structure for Rigidity and Shock Absorption
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Solution Overview
Problem
Existing display devices face challenges in portability, durability, rigidity, heat dissipation, shock absorption, and usability, particularly in portable forms.
Innovation Solution
A display device design featuring a bottom case, top case, and a locking unit with a cam mechanism that includes specific surface configurations to enhance storage, durability, and usability, with features like a curved and straight surfaces, a concave portion, and a stopper to improve locking and reduce unnecessary movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a locking structure is added to improve durability and rigidity, then the structural strength is improved, but the device complexity increases
Solution Approach 1:
The locking structure employs a pivotable lock lever that can dynamically switch between locked and unlocked states. The cam mechanism provides automatic locking when the top case closes and automatic unlocking when the top case opens, eliminating the need for separate locking and unlocking operations while maintaining structural strength.
Solution Approach 2:
The locking structure is designed to automatically lock and unlock itself based on the opening/closing state of the top case. The cam mechanism engages with the lock lever to provide automatic locking without requiring user intervention, and the spring mechanism provides automatic unlocking when the top case is opened.
2Reliability
If a cam mechanism with multiple surfaces is used to improve locking reliability, then the locking reliability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The cam mechanism is segmented into distinct surfaces with specific functions: a first surface for locking engagement, a second surface for unlocking engagement, and a third surface for positioning. This segmentation allows each surface to be optimized for its specific function while maintaining overall manufacturing feasibility through modular design.
Solution Approach 2:
The cam mechanism incorporates curved surfaces that work with the pivotable lock lever to provide smooth locking and unlocking transitions. The curved geometry allows for gradual engagement and disengagement, reducing the precision requirements compared to sharp angular features while maintaining reliable locking.
3Ease of operation
If the lock lever pivot angle is reduced to improve usability, then the ease of operation is improved, but the locking force may be compromised
Solution Approach 1:
The lock lever is designed to pivot through a limited angle range while maintaining effective locking force. The cam mechanism compensates for the reduced pivot angle by providing mechanical advantage through the cam's geometric shape, ensuring that the locking force is sufficient even with a smaller angle of motion.
Solution Approach 2:
The cam mechanism changes the effective lever arm length and mechanical advantage parameters during the locking cycle. By adjusting these parameters through the cam's geometry, the system maintains adequate locking force despite the reduced pivot angle of the lock lever.
Data Source
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AI summary
Disclosed is a display device. The display device of the present disclosure may include: a bottom case which accommodates a display panel; a top case which opens or closes the bottom case; and a locking unit which is pivotally connected to the bottom case, and which includes a lock lever engaged with or disengaged from the top case, in which the locking unit may include a cam which provides a pivot axis of the lock lever at between the bottom case and the lock lever, which extends in a radial direction of the pivot axis, and which is in contact with the bottom case, in which the cam may include: a first surface which is located between the pivot axis and the top case, and which forms a curved surface; a second surface which is opposite to the first surface with respect to the pivot axis, and which forms a straight surface; and a third surface which is located between the first surface and the second surface, which forms a curved surface from the second surface, and which forms a step raised with respect to the first surface.