US 4,131,922 A · Operation device of tape recorder

Abstract

An operation device of a tape recorder adapted to bring mechanisms such as a pinch roller, magnetic heads and so on into constant-speed tape feeding condition, making use of a part of torque of a member such as a capstan which is driven by a motor. The device has a manual operation system and an automatic actuating system. The manual operation system includes a manually operable constant-speed tape feed operation member and first locking means adapted to lock the manual operation member at an operation position to which the same has been displaced. The automatic actuating system includes a first rotary body adapted to be rotated in relation with the rotation of the shaft of the motor, a second rotary body having an engageable portion capable of performing a torque-transmitting engagement with the first rotary body and a non-engageable portion which cannot engage the first rotary body, an actuating plate adapted to be displaced by the rotation of the second rotary body and to control the position of the mechanisms, and second locking means to lock the mechanisms at a position to which they have been displaced. As the operation member is operated, it is locked at the operation position by the first locking means. A part of power for displacing the operation member to the operation position is transmitted to the second rotary body, which has confronted the first rotary body at its non-engageable portion, is slightly rotated to bring its engageable portion into engagement with the first rotary body, so as to be continuously driven by the latter. As the second rotary body is driven, it displaces the mechanisms through the actuating plate, and the mechanisms are held at the position to which they have been moved.

Claims10

Dependent claims

An operation device of a tape recorder comprising:

(a) A tape running driving system including, at least, a capstan adapted to be rotatively driven by a motor, a pinch roller mounted to confront said capstan for a movement to and from the latter, so as to cooperate with said capstan in feeding the tape at a constant speed, and a play plate adapted to control the movement of said pinch roller toward and away from said capstan;
(b) a manual operating system including a manually operable operation member for constant-speed tape feeding adapted to be displaced from a stopping position to an operation position, and a first locking member adapted to lock said manually operable operation member at said operation position;
(c) a first rotary body adapted to be rotated in relation with the rotation of the shaft of said motor;
and
(d) and an automatic operation system including a second rotary body having an engageable portion engageable with said first rotary body and a non-engageable portion which cannot engage said first rotary body, said second rotary body being adapted to confront said first rotary body at its non-engageable portion when said operation member is not operated, but to be rotated when an initial torque is imparted thereto by the operation of said operation member, so as to bring said engageable portion to confront said first rotary body, so that it may be driven continuously by said first rotary body in accordance with the rotation of the latter, until said non-engageable portion comes again to confront said first rotary body, an actuating plate adapted to be displaced by the rotation of said second rotary body, so as to displace said play plate, thereby to put said pinch roller into cooperation with said capstan, and a second locking member adapted to lock said play plate at a position to which said play plate has been displaced.

2 more elements

An operation device of a taper recorder comprising:

a slider having an upright section and a cam portion and adapted to be slidingly moved in relation with a manual operation, said slider being biased toward a stopping position by a first reslient member;
a first locking member slidably mounted on a chassis and biased by a second resilient member in one direction, said first locking member having a locking portion for locking said upright section of said slider;
a play plate associated with magnetic heads and a pinch roller and provided at its one end with a pin, a tape running driving system including a capstan confronting said pinch roller and a flywheel adapted to rotate unitarily with said capstan;
an actuating member having an axis of rotation on said first locking member and provided at its one end with an actuating portion, said actuating member being rotatively biased by a third resilient member but being prevented from rotating by a contact with said slider;
a switching gear having an engageable and a non-engageable portions which are engageable and not engageable with a rotary body included by said tape running driving system, said switching gear further having a first pin adapted to be pressed by said actuating portion of said actuating member when the latter is rotated and a second pin;
a play arm having a cam portion adapted to be contacted by said second pin of said switching gear and an engaging portion adapted to loosely receive said pin of said play plate, said play arm being biased by a fifth resilient member for a rotation around an axis located on said chassis, and adapted to be rotated against the force of said fifth resilient member by said second pin of said switching gear when the latter is rotated;
and a second locking member slidably held by said chassis and having a pin biased by said fourth resilient member toward said slider into engagement with said cam portion of said slider and a holding portion for holding said pin of said play plate.

4 more elements

In a tape recorder having a chassis carrying a tape running driving system including a motor, two reel beds and a capstan and adapted to run the tape between said two reel beds;

and a head plate slidably mounted on said chassis and biased for an automatic returning movement from an operation position to a stopping position, said head plate carrying heads and a pinch roller which are normally held at said stopping position where they are kept away from said tape, but are brought into said operation position where they contact said tape when there is a playing demand;
an operation device characterized by comprising:
(a) a first locking member adapted to prevent said automatic returning movement of said head plate when the latter is brought to said playing position, thereby to lock said head plate at said playing position;
(b) driving means capable of assuming a first position for driving engagement with said motor and a second position out of said driving engagement, said driving means being normally held at said second position and adapted, once moved to said first position, to receive a torque from said motor and transmit the resulting force to said head plate so as to displace the latter to said playing position, and to get back to said second position;
(c) manually operable operation means adapted to be moved between a stopping position and an operation position and positioned normally at said stopping position due to its self-returning force, said operation means being further adapted to be moved from said stopping to said operation positions, against said self-returning force, by a manual playing operation of the operator, so as to bring said driving means normally held at said second position into said first position;
(d) a second locking member adapted to lock said manually operable operation member at said operation position, independently of the functioning of said first locking member, when said manually operable member is brought to said operation position;
(e) power source means including a power supply switch adapted to be closed when said manually operable operation member is held at said operation position, so as to supply a power to said motor;
and
(f) stopping means for releasing said head plate and said manually operable operation member from said first and second locking members.

6 more elements

Dependencies are inferred from the claim text.

Operation device of tape recorder

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Operation device of tape recorder

Life of this patent

Abstract

Claims10