Magnetic sensor with bobbin, sleeve and terminal bed for detecting a change in magnetic flux

A magnetic sensor comprising:

• a sensor assembly;
• and
• a resin molding surrounding said sensor assembly and defining a housing;
• said sensor assembly comprising a magnet for generating a magnetic flux, a magnetic core for defining a magnetic circuit, a coil for detecting the change in the magnetic flux flowing through said magnetic core and a support member for supporting an assembly of said magnet, said magnetic core and said coil;
• said support member comprising a coil bobbin for receiving therein said magnetic core, a sleeve connected at its said one end to said coil bobbin and having a bore for receiving said magnet therein, a terminal bed disposed at the other end of said sleeve and a terminal connected to said terminal bed and electrically connected to said coil;
• and
• said terminal bed having formed therein a cavity portion for receiving a portion of said resin molding therein, thereby increasing contact area between said resin molding and said terminal bed;
• wherein said cavity portion is a plurality of elongated grooves formed along each side of said terminal bed to surround said bore of said sleeve.