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Q: Vibration mechanism ( Answered 5 out of 5 stars,   0 Comments )
Subject: Vibration mechanism
Category: Miscellaneous
Asked by: ohmann37-ga
List Price: $25.00
Posted: 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?
Subject: Re: Vibration mechanism
Answered By: pinkfreud-ga on 05 Apr 2006 11:40 PDT
Rated:5 out of 5 stars
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

"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

I've found several online sources for such motors:

Electronic Goldmine: Our Smallest Pager Motor


VOTI: very small pager vibrator motor (surplus)

You'll find many sizes and styles of small vibrator motors listed here:

EC Plaza Global: micro vibrator motor

My Google search strategy:

Google Web Search: "vibrator motor" pager OR phone

Google Web Search: "micro vibrator motor OR motors"

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,

Request for Answer Clarification by ohmann37-ga on 05 Apr 2006 19:59 PDT
I have an application for this type of would I find out
which one is best for my use?

Clarification of Answer by pinkfreud-ga on 06 Apr 2006 10:30 PDT
There are basically two types of small vibrator motors: cylindrical
ones and coin-shaped ones. The choice will probably depend upon the
contours of the space allotted for the motor. Since these motors are
quite inexpensive, it would be quite feasible to purchase several of
them and give them a real-world trial.

If you are looking for technical specifications, you may want to
contact manufacturers of this type of motor. Two major manufacturers
are SANYO and DOOCO:

General Sales Inquiries & Tech Support

DC Micro Motor Division
SANYO E&E America Company
1062 Thorndale Avenue
Bensenville, IL 60106
Tel: (630) 694-8230
Fax: (630) 595-7028
8:30am - 5:00pm CST Mon - Fri
English and Japanese spoken


1287 Barclay Blvd.
Buffalo Grove, IL 60089
Phone   (847) 419-9200  
Fax   (847) 419-9209  
ohmann37-ga rated this answer:5 out of 5 stars

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