Patent ID: 7491126

Claim:
An expandable baton for self-protection comprising: a handle of which the upper and lower ends are opened and which is formed of a steel baton having a tapered portion provided in the lower end thereof, the steel baton being covered by a grip; first and second telescoping rods that are elastically supported by a spring mounted in a center portion of the handle and have different diameters respectively so as to be sequentially telescoped on an inner circumference of the steel baton in a longitudinal direction thereof inside the handle; a locking piece formed of a leaf spring which is mounted so as to elastically move in a center portion of a locking piece fixing section inserted through an upper opening of the handle, the locking piece is mounted in a locking piece insertion hole passing through upper and lower portions of the locking piece fixing section, and has a pair of elastically-moving sections formed by cutting a center portion of the locking piece, the locking piece having a locking projection formed in both sides such that an insertion-side end of the second telescoping rod is locked thereto; a switch built in a switch cap which is mounted over the locking piece fixing section so as to project above the handle, the switch being capable of moving the pair of elastically-moving sections of the locking piece inwardly so that the second telescoping rod locked to the locking projection of the locking piece is released.