De-bouncing keypad and preparation method thereof
AssigneeNantong Memtech Technologies Co., Ltd.
InventorsHuisheng Han, Zhenxing Wang, Yang Ding, Hongmei Zhang, Zhihao Dong, Jie Shi
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Abstract
The present invention discloses a de-bouncing keypad and a preparation method thereof, wherein the keypad is composed of a rubber substrate and a metal contact having three layers of layered structures. A layer of tin alloy or lead alloy is plated on a surface of the metal contact by electroplating or chemical plating. The metal contact plated with the tin alloy or lead alloy has excellent contact bouncing resistance and arc-ablation resistance, and the metal contact is further composited with the rubber to shape and prepare the rubber de-bouncing keypad.
Claims21
A de-bouncing keypad, comprising:
- a rubber substrate;
- and
- a metal contact, which is a layered complex including a first layer, a second layer, and a third layer, attached with the rubber substrate,
- wherein the first layer is a rubber layer having a thickness of 0.1-10 mm and contacts the rubber substrate,
- wherein the second layer is a sheet metal layer having a thickness of 0.1-10 mm and containing magnesium, aluminum, titanium, chromium, manganese, ferrum, cobalt, nickel, copper, zinc, niobium, molybdenum, silver, tin, tantalum or tungsten, and
- wherein the third layer is a tin alloy plated layer or lead alloy plated layer having a thickness of 0.1-10 μm selectively deposited onto the second layer.
A de-bouncing keypad, comprising:
- a rubber substrate;
- and
- a metal contact, which is a layered complex including a first layer, a second layer, and a third layer, attached with the rubber substrate,
- wherein the first layer is a rubber layer having a thickness of 0.1-10 mm;
- wherein the second layer is a sheet metal layer having a thickness of 0.1-10 mm and containing magnesium, aluminum, titanium, chromium, manganese, ferrum, cobalt, nickel, copper, zinc, niobium, molybdenum, silver, tin, tantalum or tungsten,
- wherein the second layer is a metal sheet having a convex point or a concave point, a metal sheet having a convex line or a concave line, a metal sheet having a convex surface or a concave surface, a metal sheet having a small hole with an area less than 1 mm2, a metal gauze, metal foams or a metal fiber sintered felt;
- and
- wherein the third layer is a tin alloy plated layer or lead alloy plated layer having a thickness of 0.1-10 μm selectively deposited onto the second layer.
Dependencies are inferred from the claim text.