Waterproof Touch Module Using Thin Film Sealing
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Solution Overview
Problem
Conventional touch modules lack a waterproof structure, leading to increased thickness and material costs in electronic devices, as separate slide and press units are assembled without waterproofing, and existing solutions like gluing or rubber structures are inefficient.
Innovation Solution
A waterproof touch module is created by attaching a waterproof plate with an adhesive onto a casing, sealing the touch unit within an installing portion, using a polyester film material for the plate and a hollow adhesive design to mimic the feel of pressing a button.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber structure or gluing method is used to waterproof the touch module, then waterproof performance is improved, but device thickness increases by 3-4 mm and material cost increases
Solution Approach 1:
The patent uses a waterproof film (such as PET film) with thickness of 0.05-0.2 mm to replace traditional rubber structures or gluing methods. The film is stretched to form a tight seal around the touch module components, providing effective waterproofing while adding minimal thickness to the device.
Solution Approach 2:
The waterproof structure is divided into multiple components: a waterproof box, a waterproof film, and sealing structures. The film is separately stretched and positioned to seal specific areas, allowing precise waterproofing without adding unnecessary bulk to the entire device.
2Reliability
If a rubber structure or gluing method is used to waterproof the touch module, then waterproof performance is improved, but material cost increases
Solution Approach 1:
The patent employs thin film materials (0.05-0.2 mm thickness) such as PET film instead of expensive rubber structures or complex gluing materials. This provides effective waterproofing at a lower material cost while maintaining device performance.
3Reliability
If the touch module is sealed with traditional methods, then waterproof effect is achieved, but the press button feel is lost
Solution Approach 1:
The waterproof film is stretched tightly over specific areas to maintain the press button feel, while leaving other areas with appropriate clearance. The hollow area in the adhesive layer is designed to be slightly larger than the press block, allowing the film to deform under pressure and provide tactile feedback.
Solution Approach 2:
The waterproof structure has different characteristics in different areas: the film is tightly stretched over the press button area to maintain tactile feedback, while having clearance in other areas. The adhesive layer has a hollow area with specific dimensions to allow localized deformation for button feel.
Data Source
AI summary
Disclosed are an electronic device and a waterproof touch module of the electronic device. The electronic device includes a casing and the waterproof touch module, and an installing portion is formed on a surface of the casing. The waterproof touch module includes a touch unit, an adhesive and a waterproof plate, and the touch unit is installed at the installing portion, and the waterproof plate is attached onto a surface of the casing through the adhesive and covered onto the touch unit, so that the touch unit is sealed in the installing portion to achieve a good waterproof effect.