Reinforced Waterproof Button Module for Impact-Resistant Electronics
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Solution Overview
Problem
Conventional outdoor electronic devices, such as doorbells, lack impact resistance, as the button structure is vulnerable to external forces, leading to potential damage of the circuit board and switch elements due to the inability of waterproof rubber members to absorb impact forces effectively.
Innovation Solution
A button module with a reinforced member disposed between the pressing member and the circuit board, which restricts the pressing member's movement and absorbs impact forces, comprising a waterproof member with a fixing flange and a reinforced member that connects to the casing, ensuring the force is not directly applied to the fragile circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof rubber member is provided between the button and circuit board to prevent moisture entry, then waterproofing performance is improved, but impact resistance remains insufficient as the rubber member cannot block transmitted impact forces
Solution Approach 1:
The button module employs a composite structure combining a waterproof rubber member with a reinforced member made of rigid material (metal or hard plastic). The rubber member provides waterproofing while the rigid reinforced member provides impact resistance. This composite approach allows both waterproofing and impact protection functions to be achieved simultaneously within the same button structure.
Solution Approach 2:
The reinforced member acts as an intermediary element between the button and the circuit board. It intercepts and blocks impact forces before they can reach the circuit board, while the waterproof rubber member handles the waterproofing function. This intermediary structure resolves the contradiction by separating the impact resistance function from the waterproofing function.
2Device complexity
If the button structure is simplified without additional reinforced components, then device complexity is reduced, but the button becomes vulnerable to external forces causing damage to internal components
Solution Approach 1:
The reinforced member is merged with the button structure, forming an integrated button assembly. The reinforced member can be integrated into the button housing or positioned within the button structure, creating a unified component that provides both the button's pressing function and enhanced impact resistance. This merging approach minimizes additional complexity while achieving the desired strength improvement.
Data Source
AI summary
A button module is applied to an electronic device. The electronic device includes a casing. The button module includes a circuit board, a pressing member, a waterproof member and a reinforced member. The circuit board is disposed in the casing. The circuit board includes a switch element. The pressing member disposed on a mounting opening of the casing. The waterproof member includes a fixing flange and a first surface and a second surface opposite to each other. The first surface faces the pressing member, and the second surface faces the circuit board. The fixing flange connects to the casing. The reinforced member is disposed on the second surface of the waterproof member, and an edge of the pressing member corresponds to the reinforced member. The reinforced member includes an opening corresponding to the switch element.