US 4,059,245 AGranted

Magnetic recording-reproducing device

AssigneeMatsushita Electric Industrial Co., Ltd.

InventorHuminori Hirose

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Abstract

The invention discloses a magnetic recording-reproducing device wherein a reversible motor is drivingly coupled to two one-way rotary clutches one of which is engaged when rotated in one direction and the other of which is engaged when rotated in the other direction and to a capstan shaft for transporting a tape at a constant speed, and the one-way rotary clutches are drivingly coupled to two reel shafts, respectively, whereby depending upon the direction of rotation of the reversible motor, either of the reel shafts is selectively driven together with the capstan shaft.

Claims3

Dependent claims

A magnetic recording and reproducing apparatus comprising:

a reversible motor;
first and second rotatable reel shafts upon which corresponding reels containing a magnetic recording medium may be disposed;
a capstan shaft for transporting said medium at a constant speed;
first and second one-way rotary clutches each having an inner race and an outer race, one race of said first clutch being coupled for rotation with said first reel shaft, one race of said second clutch being coupled for rotation with said second reel shaft, said first clutch engaging when the other race thereof is rotated in a given direction and said second clutch engaging when the other race thereof is rotated in the opposite direction
means for coupling said motor to said capstan and said other races for rotation therewith, said other races rotating in said given direction to drive said first reel shaft through said first clutch when said motor is driven in one direction, said other races rotating in said opposite direction to drive said second reel shaft through said second clutch when the driving direction of said motor is reversed;
each of said clutches having the inner and outer race thereof disposed in coaxial relationship to define an annular space therebetween, a plurality of regularly angularly spaced apart spring members integrally formed with one of said inner and outer races thereof and radially extending into said annular space to define a corresponding plurality of cages in said annular space, the portions of the peripheral surfaces of said races forming walls of each cage converging toward each other adjacent a spring member at the end of the cage corresponding to a first rotational direction to form a roller engaging region, and diverging from each other adjacent another spring member at the other end of the cage corresponding to the opposite rotational direction to form a roller idling region, and a spherical or cylindrical roller disposed in each cage and having a diameter greater than the distance between said races in said roller engaging region and less than the distance between said races in said roller idling region, whereby said clutch is engaged when the races thereof are rotated to drive said rollers into said engaging regions, and said clutch is disengaged when the races thereof are rotated to drive said rollers into said idling regions.

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Dependencies are inferred from the claim text.

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Abstract

A magnetic recording and reproducing apparatus comprising:

a reversible motor;
first and second rotatable reel shafts upon which corresponding reels containing a magnetic recording medium may be disposed;
a capstan shaft for transporting said medium at a constant speed;
first and second one-way rotary clutches each having an inner race and an outer race, one race of said first clutch being coupled for rotation with said first reel shaft, one race of said second clutch being coupled for rotation with said second reel shaft, said first clutch engaging when the other race thereof is rotated in a given direction and said second clutch engaging when the other race thereof is rotated in the opposite direction
means for coupling said motor to said capstan and said other races for rotation therewith, said other races rotating in said given direction to drive said first reel shaft through said first clutch when said motor is driven in one direction, said other races rotating in said opposite direction to drive said second reel shaft through said second clutch when the driving direction of said motor is reversed;
each of said clutches having the inner and outer race thereof disposed in coaxial relationship to define an annular space therebetween, a plurality of regularly angularly spaced apart spring members integrally formed with one of said inner and outer races thereof and radially extending into said annular space to define a corresponding plurality of cages in said annular space, the portions of the peripheral surfaces of said races forming walls of each cage converging toward each other adjacent a spring member at the end of the cage corresponding to a first rotational direction to form a roller engaging region, and diverging from each other adjacent another spring member at the other end of the cage corresponding to the opposite rotational direction to form a roller idling region, and a spherical or cylindrical roller disposed in each cage and having a diameter greater than the distance between said races in said roller engaging region and less than the distance between said races in said roller idling region, whereby said clutch is engaged when the races thereof are rotated to drive said rollers into said engaging regions, and said clutch is disengaged when the races thereof are rotated to drive said rollers into said idling regions.

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