Key Structure Assembly for Tolerance-Stable Button Feel
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Solution Overview
Problem
The assembly dimension chain between the key component and the switch device in electronic devices is long, leading to poor hand feeling and increased production costs due to accumulated tolerance issues.
Innovation Solution
A key structure with a mounting seat, clamping holder, and switch device configuration that includes sealing elements and insertion blocks to limit axial movement, improve sealing, and reduce assembly errors, featuring a simplified manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a long assembly dimension chain including multiple parts (key component, bar tube holder, housing, circuit board, switch device) is used, then the structural flexibility and modularity are improved, but the accumulated tolerance leads to poor hand feeling and increased production complexity
Solution Approach 1:
The patent merges the mounting seat and clamping holder into a single integrated component that directly connects the key component to the switch device. This eliminates intermediate parts (bar tube holder, housing, circuit board) from the critical assembly dimension chain, reducing the number of interfaces and accumulated tolerances while maintaining structural flexibility through the integrated design's inherent mounting and clamping functionalities.
2Adaptability or versatility
If a long assembly dimension chain with multiple parts is used, then the structural flexibility is improved, but the device complexity and production management difficulty increase
Solution Approach 1:
The integrated mounting seat and clamping holder reduces the total part count and simplifies the assembly structure. This merger eliminates the need to manage multiple separate components (mounting seat, bar tube holder, clamping holder) and their respective assembly procedures, thereby reducing production management complexity while preserving the structural flexibility needed for mounting and clamping functions.
Solution Approach 2:
The integrated component is designed with distinct functional zones: a mounting seat portion for securing the switch device and a clamping holder portion for securing the key component. This functional segmentation within a single integrated part maintains the operational flexibility of separate components while simplifying the overall device structure and production management.
3Ease of manufacture
If traditional assembly structure with multiple intermediate parts is used, then the modular assembly is improved, but the accumulated tolerance leads to increased production costs
Solution Approach 1:
By integrating the mounting seat and clamping holder, the patent reduces the number of assembly interfaces from multiple separate parts to a single integrated component. This directly reduces accumulated tolerance while maintaining modular assembly ease, as the integrated component can still be independently manufactured and assembled as a complete unit, eliminating the need for precise alignment across multiple intermediate parts.
Data Source
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AI summary
This application relates to the field of switch technologies, and discloses a key structure and an electronic device. The key structure (100) includes a housing (10), a mounting seat (20), a key component (30), a clamping holder (40), a switch device (50), and a flexible printed circuit (60). The mounting seat (20) is mounted on the housing (10), the clamping holder (40) and the key component (30) are both mounted on the mounting seat (20), and the switch device (50) is mounted on the clamping holder (40). In this way, only the mounting seat (20) and the clamping holder (40) are added to an assembly dimension chain between the switch device (50) and the key component (30), so that an accumulated part error between the switch device (50) and the key component (30) can be reduced, a comfort level of a hand feeling of the key component (30) can be improved, management difficulty during production of the electronic device can be reduced, and costs can be reduced.