Cassetteholderunit; Reel Brake - Panasonic REV-1 Service Manual

1-2. Cassette holder unit
(1)
Cassette-in operation
The Rack drive arm drives Main Cam gear by inserting the cassette tape. Consequently, Position
switch detects the cassette-in mode so that Loading motor drives. The mode goes to the Stop
mode from the Cassette-in through the Loading mode.
@) The parts quantity reduction of Cassette holder unit.
(Z Mechanism: 21 pieces, K Mechanism: 36 pieces)
a. Release lever has been installed in Right Side Plate.
b. Cassette guide has been installed in Front Panel unit.
c. Safety lever spring is made by the resin.
d. Opener lever has been changed into the single opener type.
e. One side of Side Plate unit is hung on Chassis in order to fix it.
@ Improvement of the cassette insertion
(The force of the cassette insertion Z Mechanism: Approximately 400gm.,
K Mechanism: Approximately 600gm.)
The tooth pitch of Worm gear which has been extended against the previous model, is located
on the Motor so that Worm gear can be reversed. Consequently, the Motor rotates before the
insertion spring (the combined spring) is working when the cassette tape is inserted, so that
the repelled force of the insertion spring has been reduced as differing from the present
model.
@ Small-sized Cassette holder unit (Thinned unit)
a. The Wiper arm method which has been adopted, assigned Wiper arm between Cassette
Holder Plate and Side Plate so that the small-sized of the width has been realized.
b. To prevent the increment of parts quantity such as Safety Iever is used for Pre-open
mechanism shown in the present model, and the small-sized unit has been realized by
inclining one portion of the L groove in Side Plate.
c. The part of driving change-over is located in the nearest to the center of Reel so that the
depth size is compacter.
1-3.
Reel brake
(1)
(2)
x
(3)
Supply Reel Brake is used for Tension Regulator which is composed of the conventional Main
brake and the soft brake function.
Take-up Reel Brake is used as Band Brake unit in order to correspond with Supply Reel
Tension Regulator performance:
This is composed of Tension regulator and brake. The tape always is given the tension
the advance direction by Tension band.
Construction of Supply reel tension regulator
Comparison of the construction with the conventional model
Brake.
against
2