Audio apparatus

Apparatus for use with a sound track unit comprising a generally planar frame containing a tubular body mounted for rotation about its tubular axis within said frame and with said axis of said tubular body perpendicular to the plane of said generally planar frame by means of covers having apertures therein surrounding opposite ends of said tubular body, said apparatus comprising:

• a. a rigid receptacle for receiving and locating said sound track unit with said frame in a given plane and with said axis of said tubular body coincident with a given axis;
• b. an elongated shaft mounted with respect to said rigid receptacle with its axis of elongation extending away from said receptacle in spaced parallel relation to said given axis and with one end thereof adjacent said receptacle;
• c. a slide member mounted on said shaft for movement along said shaft from a first position adjacent said receptacle to a second position spaced from said receptacle;
• d. drive means comprising a solid body having an exterior surface dimensioned to mate with the interior surface of said tubular member mounted on said slide member for rotation about said given axis, said solid body penetrating said receptacle in said first position of said slide member and being spaced from said receptacle in said second position of said slide member;
• e. first pivot means mounted for rotation about an axis spaced from and perpendicular to said given axis and including a pawl engaging said slide member;
• f. first spring means urging said first pivot member to rotate through a given arc away from said receptacle and move said slide member from said first position to said second position thereof;
• g. second pivot means mounted for rotation about an axis perpendicular to said given axis and spaced from both said given axis and said axis of rotation of said first pivot means and including a projection extending into interfering relation with said first pivot means during a portion of the rotational movements thereof through through their respective given arcs;
• h. second spring means urging said second pivot means to rotate through a given arc away from said receptacle;
• i. key hook means mounted on said second pivot means and extending into said receptacle for engagement by said frame upon insertion thereof into said receptacle to cause said second pivot means to rotate toward said receptacle against the force of said second spring means;
• said rotation of said second pivot means causing said first pivot means to rotate toward said receptacle against the force of said first spring means through said interfering relation between said first and second pivot means and allowing said slide member to move from said second position to said first position thereof and said solid body of said drive means to enter into driving engagement within said tubular body of said sound track unit.