Asked by: ohmann37-ga
List Price: $25.00
05 Apr 2006 10:49 PDT
Expires: 05 May 2006 10:49 PDT
Question ID: 715763
What mechanism makes a cell phone or pager vibrate, and where can I purchase that component?
Re: Vibration mechanism
Answered By: pinkfreud-ga on 05 Apr 2006 11:40 PDT
The device which enables pagers and cell phones to vibrate is a tiny, very simple motor which is unevenly balanced. As it rotates on its shaft, the deliberately uneven weighting causes it to shake or thump. Continuous rapid rotation results in a steady vibrating movement. The same concept is often used in other types of vibrators, from personal massagers to vibrating beds and chairs. "Plurality of electromagnetic windings are positioned on said rotor assembly, said rotor unbalance being effected by at least one of said windings being substantially different in size and weight than the other windings." Free Patents Online: United States Patent 4931765 http://www.freepatentsonline.com/4931765.html "Pager or cell phone vibrator motors ... the way they do it is the output shaft of a vibrator motor has a non-uniform weight attached to it so as the shaft spins, the weight causes a vibration." Board Game Designers Forum http://www.bgdf.com/modules.php?name=Forums&file=viewtopic&t=1264 I've found several online sources for such motors: Electronic Goldmine: Our Smallest Pager Motor http://www.goldmine-elec-products.com/prodinfo.asp?number=G15615 MPJA Online: 6mm CELL PHONE VIBRATOR MOTOR http://www.mpja.com/category/DC__Motors/6mm_CELL_PHONE_VIBRATOR_MOTOR_16053_MD.asp VOTI: very small pager vibrator motor (surplus) http://www.voti.nl/shop/catalog.html?MOT-06 You'll find many sizes and styles of small vibrator motors listed here: EC Plaza Global: micro vibrator motor http://www.ecplaza.net/ecmarket/list.asp?cmd=search&keywords=micro+vibrator+motor My Google search strategy: Google Web Search: "vibrator motor" pager OR phone ://www.google.com/search?hl=en&q=%22vibrator+motor%22+pager+OR+phone Google Web Search: "micro vibrator motor OR motors" ://www.google.com/search?hl=en&q=%22micro+vibrator+motor+OR+motors%22 I hope this is helpful! If anything is unclear or incomplete, please request clarification; I'll gladly offer further assistance before you rate my answer. Best regards, pinkfreud
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