Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Tape record
Reexamination Certificate
1999-04-14
2001-02-06
Davis, David (Department: 2754)
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Tape record
Reexamination Certificate
active
06185064
ABSTRACT:
TECHNICAL FIELD
The present invention relates to a tape player, and more particularly to improvement of an auto-reverse tape player mounted on a vehicle.
BACKGROUND OF THE INVENTION
In recent years, as a multi-function tape player has been more developed, more electronic devices have been employed in an apparatus.
FIG. 59
is a sectional view of a cam device for mechanically actuating a cassette tape in a conventional tape player apparatus disclosed in Japanese Patent Publication (Kokoku) No. 4-10136. In the drawing, reference numeral
301
denotes an operation mode switching cam,
302
is a horizontal head base backward cam for the cassette tape, and
303
is a cassette vertical cam. As shown in
FIG. 60
, these cams are rotated to move links
304
,
305
, and
306
respectively having pins engaging cam grooves in the respective cams so as to actuate mechanisms for a carry in/out operation of the cassette, movement of the head, switch-over of a run direction during playing back, and so forth.
Though many electronic devices have been increasingly employed and multi-functional operations have been required, complicated mechanical links as shown in the conventional embodiment are in actuality essential for drive (such as fast forward, or playback) of the tape. Consequently, as more electronic devices have been employed in the apparatus, the need to simplify these mechanical portions, reduce the number of parts, and so forth has grown. Further, there are caused important problems relating to fabrication of the apparatus, in that the mechanical portions should be assembled at higher efficiency, the apparatus should be made more compact, and so forth.
SUMMARY OF THE INVENTION
The present invention is made to overcome the problems as described above, and it is an object of the present invention to provide a tape player which can simplify the mechanical portions, reduce the number of parts, and can solve the problems in the fabrication of the apparatus, about the higher efficient assembly of the apparatus, a more compact apparatus, and so forth.
A tape player according to the present invention is provided to operate pins engaging four different grooves provided in one disk-like cam so as to move in the respective grooves according to rotation of the disk-like cam, a member having a lever working in conjunction with the movement of the pins, for performing a carry in/out operation of a cassette tape engaging the lever by the operation of the lever, a member for a moving operation of a head base, a member for a playback running direction switching operation, and a member for selective operation to transfer driving force to a cassette tape driving mechanism during fast forward.
Thereby, the one disk-like cam enables the cassette tape carry in/out operation, the head base moving operation, the playback running direction switching operation, and the selective operation to transfer the driving force to the cassette tape driving mechanism during fast forward.
Alternatively, in a tape player according to the present invention, a first groove for a cassette carry in/out operation, and a second groove for a playback running direction switching operation are provided in a first surface of a disk-like cam. Further, a third groove for a head base moving operation, and a fourth groove for a selective operation to transfer driving force to a cassette tape driving mechanism during fast forward are provided in a second surface.
Thereby, the grooves in both sides of the one disk-like cam enable the cassette tape carry in/out operation, the head base moving operation, the playback running direction switching operation, and the selective operation to transfer the driving force to the cassette tape driving mechanism during fast forward.
Alternatively, in a tape player according to the present invention, in four operations including a cassette tape carry in/out operation, a head base moving operation, a playback running direction switching operation, and a selective operation to transfer driving force to a cassette tape driving mechanism during fast forward, the operations are performed according to rotation of a disk-like cam from a starting point in the following order: a cassette tape take-in and cassette tape mounted to tape driving mechanism mode; a tape L direction fast forward mode; a tape R direction playback mode; a tape L direction playback mode; and a tape R direction fast forward mode.
Thereby, only one disk-like cam enables the cassette take-in and cassette tape mounted to tape driving mechanism mode operation, the tape L direction fast forward operation, the tape R direction playback operation, the tape L direction playback operation, and the tape R direction fast forward operation.
Alternatively, in a tape player according to the present invention, there is a difference in groove width between a first groove and a second groove provided in a first surface of a disk-like cam, or between a third groove and a fourth groove provided in a second surface.
Thereby, pins can be prevented from erroneously engaging wrong grooves since the grooves provided in the one disk-like cam have different groove widths.
Alternatively, in a tape player according to the present invention, a rib is provided for a groove other than first to fourth grooves provided in a disk-like cam.
Thereby, the grooves in the one disk-like cam can clearly be discriminated.
Alternatively, in a tape player according to the present invention, when a disk-like cam is rotated by a predetermined angle, in four operations including a cassette tape carry in/out operation, a head base moving operation, a playback running direction switching operation, and a selective operation to transfer driving force to a cassette tape driving mechanism during fast forward, no force is applied to each pin from members for performing at least three of the operations.
Thereby, at a predetermined position of a groove, no force is applied to the disk-like cam from the members for performing at least three of the four operations, resulting in easier assembly.
Alternatively, in a tape player according to the present invention, an overrun portion is provided at ends of first to fourth grooves in a disk-like cam so as to urge an elastic body used for a member for each operation after the operation.
Thereby, the elastic body used for the member for each operation at the ends of the first to fourth grooves in the disk-like cam can be urged by the overrun portion after the operation.
Alternatively, a tape player according to the present invention includes a disk-like cam, a mode detecting switch to detect each mode of the disk-like cam, a mode detecting gear provided for the mode detecting switch to have the same number of teeth as that of teeth of the disk-like cam, and a transfer gear in which two gears having different diameters are coaxially disposed to engage both the disk-like cam and the mode detecting gear. Further, the two gears having the different diameters in the transfer gear have the same number of teeth, and crests of both the teeth have the same angle.
Thereby, a more compact structure can be provided by coaxially disposing the two gears having the different diameters in the transfer gear engaging both the one disk-like cam and the mode detecting gear, and smooth operation can be expected even if the disk-like cam or the mode detecting gear erroneously engages a wrong gear because the gears are identical in the number of teeth and in the angle of the crest.
Alternatively, a tape player according to the present invention includes a first slide plate moving according to movement of a pin engaging a first groove provided in a disk-like cam for a cassette carry in/out operation, a second slide plate connected to the first slide plate through an elastic body to move in conjunction with movement of the first slide plate in the same direction as that of the movement so as to move a slider for holding a cassette tape in a direction opposed to the above direction, and a detecting lever engaging the slide plate by movement of the slide plate during cassett
Matsuda Takashi
Minemoto Kenichirou
Morimoto Takao
Nakanishi Yasuyuki
Davis David
Mitsubishi Denki & Kabushiki Kaisha
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