Magnetic tape recording and/or reproducing apparatus

Claim 2

A magnetic tape recording and/or reproducing apparatus for recording and/or reproducing signals on a magnetic tape, comprising: a chassis; a disc shaft mounted on said chassis and a rotatable disc rotatably mounted on said disc shaft and having a first gear on the periphery thereof; operating mode changing means connected to said rotatable disc for being moved to a plurality of positions corresponding to a plurality of operating modes of said apparatus for thereby changing the operating mode of said apparatus; motor housing means having opposite ends with one end fixed to said chassis; a reversible motor mounted on the other end of said motor housing means and spaced from said one end for defining a space within said motor housing means, said motor housing means and said reversible motor having substantially the same cross-sectional area transversely of the direction between the ends of said motor housing means, the reversible motor having a shaft extending into said space, and said motor housing means having an opening in a side thereof and opening out of said space; and speed reducing means provided within said space and connected to said rotational shaft of said motor and having a second gear which is partially exposed out of said motor housing means through said opening and engaged with said second gear of said rotatable disc for transmitting the rotational power of said motor to said rotatable disc at a speed of rotatin reduced from the speed of rotation of said motor.

Claim 3

An apparatus according to claim 1, whereinsaid reducing means comprises a planetary differential gear train.

Claim 4

An apparatus according to claim 1, wherein each of said first and second gears is a spur gear.

Claim 5

An apparatus according to claim 1, wherein said motor housing means has a positioning member thereon for engagement with said chassis for accurately positioning said motor housing on said chassis of said apparatus so that said first and second gear are accurately engaged with each other.

Claim 6

An apparatus according to claim 4, wherein said positioning member comprises a boss provided on said one end of said motor housing means, and said chassis has a bore for receiving said boss.

Claim 7

An apparatus according to claim 1, wherein said operating mode changing means comprises a first cam provided on said rotatable disc and a cam follower engaged with said first cam for being moved to a plurality of positions corresponding to said plurality of operating modes of said apparatus.

Claim 8

An apparatus according to claim 6, further comprising a tension detecting means having a rotatable arm engageable with magnetic tape in said apparatus for detecting the tension of said magnetic tape, a second cam provided on said rotatable disc and engageable with said rotatable arm for releasing said tension detecting means from engagement with the magnetic tape.

Claim 9

An apparatus according to claim 1, further comprising a pair of reel drive turntables engageable with a pair of tape winding reels contained in a tape cassette for rotating the reels, a first cam member and a claw member mounted on said rotatable disc, brake means for braking said reel drive turntables, a brake control member connected to said brake means and having a cam follower thereon engaged with said first cam member for being moved by said rotatable disc between a first position where said brake means acts to brake said pair of reel drive turntables and a second position where said pair of reel drive turntables are released from said brake means, spring means connected to said brake control member for urging said brake control member in a direction toward said first position, a hook member fixed on said brake control member and engageable with said claw member for moving said brake control member from said first position to said second position during rotation of said rotatable disc in one direction from a stopping position, said cam follower moving said brake control member between said first position and said second position during a rotation of said rotatable disc in the other direction from said stopping position, and release means for releasing engagement of said hook member with said claw member during said rotation of said rotatable disc in the other direction for causing said brake control member to return quickly to said first position from said second position by the action of said spring means.