Patent ID: 7497490

Claim:
A telescopic stay comprising a stay body including an inner arm and an outer arm into which said inner arm is slidably fitted and lock means to lock said inner and outer arms of said stay body in a predetermined superposed position, said lock means comprising a locking rod urged toward said inner arm by a locking spring disposed in a guide member attached onto said outer arm, a knob attached to the locking rod and a locking hole provided in said inner arm and with which said locking rod is engaged so as to lock said inner and outer arms, characterized in that said guide member has a base portion engaging an inner face of the flat board portion of said outer arm and said locking spring further urges said guide member so that said base portion of said guide member is forced against the inner face of said flat board portion of said outer arm, wherein when the knob is pulled, the locking rod would move away from the locking hole at said inner arm in order to unlock the engagement between the outer arm and the inner arm, and biased by the locking spring to move the locking rod toward the inner arm in order to lock in place the outer arm with respect to the inner arm.