Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Patent
1998-01-26
2000-10-03
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
G11B 1518
Patent
active
061281565
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a tape-like recording medium travelling and driving apparatus suitable for use in a recording and/or reproducing apparatus such as a tape player or the like for recording and reproducing information on and from a tape-like recording medium such as a magnetic tape or the like.
BACKGROUND ART
Since a magnetic tape accommodated in a tape cassette is fixed at its end on a hub, when a tape cassette player finishes its operation for winding the tape, unless a tape traveling and driving mechanism is brought into its stop state, tape travel is stopped but some load is applied to a motor and a rotation transmission mechanism, which results in a trouble thereof, consumption of a power source battery or the like. Therefore, some tape cassette players have mechanisms for detecting completion of the tape winding operations and for automatically stopping the tape travelling and driving mechanisms.
Particularly, in consideration of a tape being wound around a capstan shaft in an auto reverse tape cassette player or the like, it is desirable to always detect a tape end at a tape takeup side in both of a forward travel direction and a reverse travel direction, to thereby control a switching of the tape travelling and driving mechanism.
For this end, a conventional auto reverse tape cassette player is arranged so as to have a detecting means provided at a takeup reel turntable and a supply reel turntable, regardless of whether a tape travel direction is a forward travel direction or a reverse travel direction, and the detecting means on the takeup side and the supply side respectively detect a tape end upon a forward tape travel and a reverse tape travel to thereby control the switching of the tape travelling and driving mechanism.
Since the auto reverse tape cassette player has the tape end detecting means at both of the tape takeup reel stand and the tape supply reel turntable, a reflection plate and a sensor are required for each of the tape end detecting means. Therefore, an arrangement thereof is complicated, and a means for assembling the auto reverse tape cassette player is required. Further, since two photo interrupters which are expensive as sensors are employed, a manufacturing cost thereof is increased.
Since each of the reel turntables has a small diameter and the reflection plate of the tape end detecting means attached thereto is also formed so as to have a small diameter, a relative relationship between the reflection plate and the photo interrupter serving as a sensor is easily fluctuated, which is likely to lead to malfunctions.
DISCLOSURE OF THE INVENTION
In view of such aspects, it is an object of the present invention to provide a tape-like recording medium travelling and driving apparatus which, with one detecting means, can detect a travel of a tape-like recording medium in both of a forward travel direction and a reverse travel direction, i.e., detect both direction rotation of the takeup reel turntable and thereby achieves reduction of manufacturing costs and improvement of reliability.
A tape-like recording medium travelling and driving apparatus according to the present invention includes a pair of flywheels respectively rotated and driven, a first reel turntable, and a second reel turntable, a first reel gear unit provided on the first reel turntable and rotated together with the first reel turntable, a second reel gear unit provided on the second reel turntable and rotated together with the second reel turntable, and a transmission mechanism for, by engaging any one flywheel of the pair of flywheels with one of the first and second reel gear units, transmitting a rotational drive force therefrom. The transmission mechanism comprises a mid gear to which the rotational drive force is transmitted from any one flywheel of the pair of flywheels and a rotation detecting mechanism for detecting rotation of the mid gear to detect the travelling of the tape-like recording medium.
According to the travelling and driving apparatus of the present invent
REFERENCES:
patent: 4434442 (1984-02-01), Kommoss et al.
patent: 5668681 (1997-09-01), Umezawa
Kondo Takeo
Takamatsu Ryoji
Maioli Jay H.
Sony Corporation
Tupper Robert S.
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