DAT cassette loading device

A digital audio tape cassette loading device comprising:

• a cassette holder,
• an up-down plate pivotably connected to said cassette holder by a shaft,
• a tray connected to said cassette holder and said up-down plate for associated movement with respect to each other,
• a pair of side brackets fixed in parallel to each other about a main base for supporting said cassette holder, said up-down plate, and said tray,
• a cam gear attached to said brackets by an axle pin, said cam gear having a cam groove, a full wheel gear for engaging with an electric motor, and an intermittent gear for engaging with a rack of said tray,
• an up-down holder fitted on an axle shaft mounted through rear end portions of said side brackets for operatively moving the up-down plate,
• a cam lever mounted to said axle shaft, said cam lever having a pin disposed at the front end thereof wherein the pin is inserted into said cam groove for pivotably moving the up-down holder,
• an adjusting plate having a projection fixed to said cam lever by pins which are respectively inserted into oblong holes for exposing an insert hole in said cam lever through a square opening for contacting to a bend of the up-down holder,
• a tension spring connected between said up-down holder and spring holders, and
• said cam groove of said cam gear having a first region for horizontal movement of the cassette, a second region for vertical movement of the cassette, and a third region for applying marginal stroke to the cassette wherein the marginal stroke is in proportion to the tension strength of said tension spring by pivotably moving the cam lever to produce a gap between the projection of the cam lever and a bend of the up-down holder after setting the cassette on support posts disposed on the main base, and a fourth region for preventing the cam gear from a reverse rotation by the force of restitution of the tension spring.