Keypad Edge Key Locking Mechanism for Bulging Prevention
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Solution Overview
Problem
Existing keypad designs for electronic devices, such as smartphones and laptops, face issues with edge keys being accidentally pried off and lateral movement leading to keypad bulging, which affects the device's stability and user experience.
Innovation Solution
The implementation of a hook or locking mechanism for edge keys and interlocking hooks between the keypad and housing to secure the keys in place, preventing uprooting and bulging, while maintaining a snug fit to reduce lateral movement and potential entry of dirt or moisture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If edge keys are positioned at the edges of the housing, then the keypad achieves a compact design with keys extending to the edges of the device, but the edge keys become susceptible to being accidentally pried off
Solution Approach 1:
The locking mechanism is segmented into multiple components: hooks on the housing, protruding portions on the edge keys, and locking portions on the keypad. This segmentation allows each component to perform a specific function while working together to secure the edge keys firmly in place, preventing them from being pried off while maintaining the compact design.
2Stability of the object's composition
If the keypad is secured tightly to the housing, then lateral movement and bulging are prevented, but the complexity of the securing mechanism increases
Solution Approach 1:
The securing mechanism merges multiple functions into integrated components: the hooks on the housing simultaneously provide structural support and lateral constraint; the protruding portions on edge keys serve both as positioning elements and as engagement features for the locking mechanism. This merging reduces the number of separate components needed while achieving tight securing that prevents bulging and lateral movement.
Solution Approach 2:
The locking mechanism components serve multiple functions: the hooks provide both structural attachment and lateral constraint; the protruding portions serve as both positioning features and engagement elements; the locking portions simultaneously secure edge keys and prevent keypad removal. This multi-functionality reduces overall mechanism complexity while maintaining high stability.
3Reliability
If locking mechanisms are added to secure edge keys, then key uprooting is prevented, but the manufacturing process becomes more complex
Solution Approach 1:
The hooks are pre-formed on the housing during housing manufacturing, and the protruding portions are pre-formed on the edge keys during keypad assembly. This preliminary action allows the locking components to be integrated into the manufacturing process rather than added as separate post-assembly steps, reducing overall manufacturing complexity while ensuring reliable key retention.
Data Source
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AI summary
An electronic device includes an interlocking mechanism (204) for fixing a keypad (100) to a housing (300) of the device. The housing (300) is coupled with the keypad (100) such that the keys may extend to the edges of the electronic device and the edge keys (110) are secured against being removed from the keypad (100). The edge keys (110) may include a hook or locking mechanism (204) coupled with the housing (300) to prevent uprooting of the edge keys (110). Another set of hooks (304) or lockings connect the housing (300) with the keypad (100) to prevent bulging of the keypad (100) and to limit lateral movement between the keys or the keypad (100) with the housing (300).