Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1992-09-02
1993-05-25
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
360 964, 242201, G11B 554, G11B 15295, G11B 1544
Patent
active
052145514
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
This invention relates to a driving device of a tape recorder. More particularly, this invention relates to a driving device of a tape recorder adapted to drive a sliding plate supporting a magnetic head and a pinch roller against a magnetic tape cassette and also adapted to impart a drive for record-play, fast forward and rewind to a tape reel of the magnetic tape cassette.
PRIOR ART
In a driving device of a conventional tape recorder, tape reels at the feeding side and the take-up side of a magnetic tape cassette are mounted to engage corresponding reel shafts respectively and a sliding plate supporting a magnetic head and a pinch roller is mounted for displacement with respect to the tape cassette between an operating position and a retracted position. In the operating position, the pinch roller is positioned to hold a tape between itself and a capstan, and the magnetic head is held in contact with the tape fed out from the magnetic tape cassette. In the retracted position, the pinch roller and the magnetic head are held apart from the tape. The sliding plate is biased by a spring toward the retracted position. For rewind and fast forward operations, a required rotation is given to the tape reels with the sliding plate held in the retracted position. For record and play operations, the sliding plate is moved to the operating position and the tape reels are driven at a record-play speed.
In the tape recorder of the prior art, electromagnetic solenoid means is provided so as to drive the sliding plate from the retracted position to the operation position and, throughout the record-play operation of the tape recorder, the electromagnetic solenoid means is energized so as to hold the sliding plate in the operation position. This prior art arrangement has an inherent problem that the power consumption is large because of the necessity of the continuous energization of the solenoid means during the record-play operation. Moreover, the electromagnetic solenoid means for driving the sliding plate is bulky, so that it interferes with miniaturization of the device.
DISCLOSURE OF INVENTION
The invention is mainly directed to providing a driving device of a tape recorder which does not require any electromagnetic solenoid means for moving the sliding plate which supports the magnetic head and the pinch rollers.
Another object of the invention is to provide a driving device of a tape recorder which is light in weight, small in size and of less power consumption.
To this end, according to the invention, cam means is provided to control the position of the sliding plate. The cam means is provided with cam driving means which rotates the cam means by a predetermined angle in one direction in the record-play operation thereby forcing the sliding plate into the operating position. According to a preferred aspect of the invention, means for the fast forward and the rewind operation is provided. As the direction of the fast forward is the same as that of the feeding in the record-play operation, it is necessary to cause the sliding plate to be forced into the operating position only in the record-play operation but not forced into the operating position in the fast forward operation. To this end, according to the invention, the cam driving means is so constituted as to provide the cam means with a rotation for forcing the sliding plate into the operating position only in record-play operation.
The driving means has a capstan connected to and driven by a driving source and driving gears are fixed on the shaft of the capstan to define a driving system for the tape reels. Each tape reel is provided with a driven gear which is engaged with the driving gear through an idler gear respectively. Each idler gear is rotatably mounted on an idler arm at its each end, said idler arm being swingably provided on the capstan shaft. Neither idler gear engages the corresponding driven gear when the idler arm is at the neutral position, but, one idler gear engages the driven gear on one tape reel when the idler
REFERENCES:
patent: 4131922 (1978-12-01), Yoshida et al.
patent: 4734806 (1988-03-01), Komatsu
patent: 4819891 (1989-04-01), Kamijo
patent: 4922357 (1990-05-01), Komatsu et al.
patent: 4956734 (1990-09-01), Kamijo
patent: 5005094 (1991-04-01), Komatsu et al.
Kyowa Electric & Chemical Co., Ltd.
Levy Stuart S.
Renner Craig A.
LandOfFree
Mechanism for positioning a magnetic head and a pinch roller in does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mechanism for positioning a magnetic head and a pinch roller in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanism for positioning a magnetic head and a pinch roller in will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-902202