Patent ID: 6222506
Filing Date: 2001-04-24
Classification: H01Q

Abstract:
A transmitting and receiving antenna for animal training devices, comprising:a stud bolt consisting of a hexagonal body, with an externally-threaded connector and an internally-threaded bushing provided at opposite ends of said hexagonal body;a cylindrical bobbin having an externally-threaded part at a first end thereof and assembled with said internally-threaded bushing of the stud bolt at said externally-threaded part through a screw-type engagement, with an internally-threaded hole being axially formed on a second end of said bobbin and being used for setting a desired specific frequency band of signals to be transmitted and received by the antenna, and a radial hole being formed on the bobbin at a position around said externally-threaded part in a way such that the radial hole is perpendicular to a central axis of the bobbin;a helical coil inserted into said radial hole of the bobbin at one end thereof so as to be fixed to the stud bolt at said end through a soldering process, said helical coil being regularly, densely and spirally coiled around the bobbin;a core movably engaging with said internally-threaded hole of the bobbin through a screw-type engagement and used for precisely and finely setting the desired specific frequency band of signals; anda protection cover removably assembled with the hexagonal body of the stud bolt so as to cover and protect both the core and the helical coil, said protection cover having a longitudinal cavity designed to receive both the core and the helical coil therein, with a hexagonal fitting mouth communicating with said cavity and being formed at an end of the protection cover so as to be fitted over the hexagonal body of the stud bolt.