Sound reproducing device

A sound reproduction device comprising:

• a casing;
• a record disc disposed in the casing, the record disc having a recorded face with starting and end points of sound reproduction;
• a thrust holder formed in the casing;
• a center shaft movably held by the thrust holder and capable of advancing and retracting along its longitudinal axis;
• means for normally biasing the center shaft toward its direction of retraction;
• the record disc being rotatably supported by the center shaft;
• a tone arm having forward and rearward ends, the tone arm being swingably supported at the rearward end on the casing;
• return spring means mounted on the casing for normally biasing the tone arm away from the recorded face of the record disc and toward the starting point of sound reproduction;
• a pickup carried on the forward end of the tone arm, the pickup being positioned for engagement with the recorded face of the record disc and capable of being swung between the starting and end points of sound reproduction;
• a sound transmitting member slidably engageable with the pickup;
• a speaker carried by the sound transmitting member;
• a stylus force spring acting on the sound transmitting member for urging the sound transmitting member and the pickup engaged therewith into engagement with the recorded face of the record disc with predetermined stylus force;
• a stopper member rotatable with the record disc, the stopper member being located adjacent to the face of the record disc opposite from the recorded face;
• a plurality of locking bars, each independently manipulatable from outside of the casing, the locking bars being arranged in a circle about the center shaft and being capable of advancing into the plane of rotation of and engaging the stopper member so as to cause the stopper member to temporarily stop rotation of the record disc and retracting from the stopper member to permit rotation of the record disc;
• means for biasing the locking bars toward a retracted position;
• each locking bar having a projection formed thereon;
• a manipulating member radially extending from and fixed to the center shaft;
• the manipulating member being engageable with the projections on the locking bars so as to be movable with advancing of the locking bars, the manipulating member, upon movement, causing advancing of the center shaft;
• one end of the center shaft being engageable with the sound transmitting member upon advancing such that the sound transmitting member advances away from the recorded face of the record disc to release stylus force from the pickup;
• an electric switch switchable to a closed state as the pickup moves away from the end point of sound reproduction;
• an electric motor for rotating the record disc, the electric motor being connectable to a power source through the electric switch;
• the electric motor having an output shaft;
• and
• frictional engagement means for connecting the output shaft of the motor to the record disc.