The present invention relates to a knife device. More particularly, the present invention relates to a multifunctional knife device which is specially used for a diving exercise.
Referring to FIGS. 1 and 2, a conventional multi-functional knife device has a main handle 20′, a main blade 10′ disposed on the main handle 20′, an auxiliary handle 22′, an auxiliary blade 220′ disposed on the auxiliary handle 22′, and a fluorescent tube 40′ inserted in the main handle 20′. The main blade 10′ has a round aperture 30′, a back 12′, and a true edge 120′ having a plurality of serrations 11′. The auxiliary blade 220′ has a circular aperture 301′. A pivot button 31′ passes through the round aperture 30′ of the main blade 10′ and the circular aperture 301′ of the auxiliary blade 220′ to fasten the main blade 10′ and the auxiliary blade 220′ together. The auxiliary handle 22′ has a notch 23′. The main handle 20′ has a through aperture 200′ to receive an elastic element 25′, a channel 21′ to receive the fluorescent tube 40′, a groove 24′ to match the notch 23′ of the auxiliary handle 22′, and a click block 240′ inserted in the groove 24′. The auxiliary handle 22′ engages with the main handle 20′.