Retractable contact-control pen for electric device
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United States of America Patent
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N/A
Issued Date -
Jul 17, 2008
app pub date -
Jan 17, 2007
filing date -
Jan 8, 2007
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A retractable contact-control pen with an inner rod having near its front end a position limiting area that is provided with two protrusions pressed by a compression spring to be normally pressed against the inner wall of a hollow outer rod, when the inner and the outer rods slide relative to each other, by pressing of the inner rod against the inner wall of the outer rod, the inner rod can keep its stable sliding; moreover, the outer rod has on its tailing end an opening with a reduced diameter; the inner rod has a first flange at the rear of the position limiting area and with a diameter larger than that of the opening; so that when the entire retractable contact-control pen is pulled to elongate for use, the first flange is pressed against the periphery of the opening and stops there, the entire retractable contact-control pen thus has a better strength.
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