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Edge-mounted switch, soldered to printed circuit board, gives direct sliding contact. In the graphic to the bottom left, conventional side push switches typically measure 4.5mm deep and require a mechanical actuator to connect the user button and the dome.
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Expanding LCDs on portable electronic equipment leave less board space for switches. That's one reason many of today's handheld devices feature side-push keyblock switches. Precise alignment requirements, however, drive up manufacturing cost and assembly time.
Edge-mounted switches present a low-cost alternative. And, measuring as little as 3.0 mm deep, they save even more board space. Soldered directly to the pcb, these ultra-miniature switches offer long life (to one million cycles), a 0.25- or 0.70-mm stroke, and an operating force from 1 to 5N.
K. Takamitsu, National Panasonic, Okayama, Japan; Tel: +81 6 6908 7304; Fax: +81 6 6906 1619;PAN50232@pas.mei.co.jp
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