Volume control apparatus of telephone

A volume control apparatus of telephone comprising:

• a base assembly including a central cylindrical member, a threaded bore in the cylindrical member, and a plurality of recesses;
• a gong assembly including a plastic inner gong with a top hole and a metal outer gong with a top aperture wherein the inner gong is put on the central cylindrical member and the outer gong is threadedly secured to the bore to secure the gong assembly to the base assembly;
• a drive device threadedly secured to the base assembly including a pair of opposed magnets, a ringer coil, a case for receiving the magnets, a clapper slidably provided in the ringer coil, and a cap member covered on the case;
• and a volume control assembly threadedly secured on the bottom of the base assembly including a lever having a protrusion and a hole, a bent stopper having a protrusion engaged with the hole of the lever, and an engagement member;
• wherein the protrusion of the lever is selectively engaged with one of the recesses when the lever is moved to a locked position, resulting in a distance change of the clapper with respect to the engagement member and the gong assembly respectively, thereby generating a plurality of corresponding sound volumes when the clapper reciprocally hits on the gong assembly and the stopper.