The factors affecting the tactile feedback of tact switch buttons are as follows: Spring Plate Material and Design - Material: High-quality spring plates are typically made of materials such as stainless steel or phosphor bronze. Stainless steel offers good elasticity and high strength, providing stable spring force; phosphor bronze has excellent electrical conductivity and flexibility, making the switch feel more comfortable and sensitive. - Design: Design parameters of the spring plate, such as thickness, shape, and bending angle, affect button feel. Thicker spring plates provide greater spring force, requiring more pressing force; thinner spring plates have smaller spring force and a lighter feel. Key Travel - Travel Length: Long travel means a larger finger movement distance during pressing, providing obvious feedback but less convenient operation; short travel enables faster operation but with relatively weaker feedback, prone to accidental touches. - Travel Smoothness: A stuck or uneven travel seriously impacts feel—an ideal travel should be smooth and linear. Contact Structure - Contact Type: Common types include silver alloy contacts and carbon film contacts. Silver alloy contacts have good conductivity and low contact resistance, ensuring reliable switching and a crisper feel; carbon film contacts are lower in cost but may offer slightly inferior tactility. - Contact Spacing: Moderate spacing ensures a comfortable feel and sensitive feedback. Excessive spacing requires deeper pressing to trigger, resulting in a soft feel; too small spacing may cause accidental touches and affect button lifespan. Housing Material and Structure - Material: High-quality plastic or metal housings provide better texture and stability. Plastic is lightweight, insulating, and cost-effective; metal is durable, has good heat dissipation, and enhances overall product quality. - Structure: A reasonable housing structure design offers good support and fixation, reducing shaking and noise during pressing, making the feel more stable and comfortable. Assembly Process - Component Precision: High machining precision of components ensures consistency and stability of the internal structure after assembly, providing uniform and stable tactility. - Assembly Quality: Poor installation (e.g., misaligned parts, impurities, uneven screw tightening) can cause tactile deviations, such as local insensitivity or inconsistent feel.
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