JPS5822266Y2 - tape recorder - Google Patents

Description

[Detailed Description of the Invention] The present invention 1d includes a review mechanism and a control circuit that operates when rotation stoppage of the reel shaft is detected.

This invention relates to an improvement of a tape recorder configured to turn off a motor switch when the motor switch is turned off.

Conventional tape recorders are equipped with an automatic stop circuit, which consists of a magnet attached to a rotating body that rotates in conjunction with the rotation of the reel shaft, and a reed switch detecting the rotation of this magnet. When the winding of the tape is finished, the rotation of the M-axis stops, and the generation of electrical pulses by the reed switch stops.1 This causes the motor switch to be turned from ON to OFF via the control circuit.
There are some devices that switch to stop the motor rotation.

In particular, small tape recorders that place great importance on battery life use such an automatic stop circuit, but in this case, although the motor stops rotating, the operation state of the playback button is maintained and the playback mechanism is interrupted. has moved to the playback position and has become an X.

Therefore, the rewind button is allowed to be operated while the playback button is being operated, and the tape is rewound only while the rewind button is being operated, and when the rewind button is no longer operated, it switches back to the playback state. In a tape recorder equipped with a so-called review mechanism, when the control circuit is activated and the motor switch is turned OFF by the end of tape winding during playback, if the review operation is performed, the power switch is turned ON. However, when the motor switch is turned off, the motor does not rotate, making it impossible to perform a review operation.

For this reason, some devices are equipped with a special auxiliary switch that is turned on during a review operation after the end of playback to enable the review operation.

However, adding a special auxiliary switch increases costs, requires installation space, and requires time and effort to handle the wiring.

The present invention has been proposed in view of this point, and enables a review operation after the end of playback without providing an auxiliary switch.An embodiment shown in the drawings will be described below.

In the figure, 1 is a flywheel rotated by a motor 2 shown in the circuit diagram of FIG. 5, 3 is a take-up reel shaft,
4 is a supply reel shaft, and a ring magnet 5 is provided coaxially therewith.

6 is a reed switch placed close to the ring magnet 5, and the switch 6 generates an electrical pulse signal when the reel shaft rotates 40 times, and the ring magnet stops rotating 150 times in the circuit diagram shown in FIG. When the generation of the pulse signal stops, the control circuit 8 operates via the switching circuit γ, and this q operation turns off the motor switch 9 connected to the power supply circuit of the motor 2.

10 is a relay gear meshed with a gear 11 coaxial with the supply reel shaft 4; 12 is a rewinding gear 13 facing the relay gear 10; and a rewinding idler 14 facing the flywheel 1; The idler lever 16 provided therein is a rewinding lever that is pivoted 17 on the chassis and has the idler lever 12 pivoted 18 at one end.

Reference numeral 19 denotes a rewinding operating lever, which is provided movably in the horizontal direction in the figure and has a button, and the other end 75 of the rewinding lever 16 approaches and separates from one edge of the bent piece 19'. One end of a wire spring 20 wound around the shaft 17 of the rewinding lever 16 abuts against the other line of the bent piece 19'.

Therefore, when the rewind operation lever 19 is moved to the right, the rewind lever 16 is rotated clockwise via the linear spring 20.
The rewind gear 13 meshes with the relay gear 10 and the rewind idler 14 contacts the flywheel 1.

Reference numeral 21 denotes an operating pin set up on the rewind operating lever 19.

Reference numeral 22 denotes a first slide lever which is always urged downward in the figure by a spring 23, and moves upward against the spring 23 during playback (recording), fast forwarding, rewinding (review) operation, A pair of guide pins 24 are provided on its top surface.
, 25 are provided.

26 is a pair of long grooves 2 in the pair of guide pins 24 and 25.
7.28 is the assembled second slide lever, and a spring 30 is connected between the projecting pin 29 on the lever and the guide pin 24, and the spring 30 is pressed when the first slide lever 22 moves upward. The second slide lever 26 also moves upward via the fork portion 26', and the switch 31' of the main power switch 31 is switched from the OFF position to the ON position.

As shown in the circuit diagram of FIG.
Power is supplied to the circuit and the amplifier circuit 32.

Reference numeral 33 denotes a support shaft that is linked to a regeneration mechanism that moves between a stop position and a regeneration position by operating a regeneration button (not shown), and the support shaft 33 moves in the vertical direction in the figure.

Reference numeral 34 denotes an actuation lever that is rotatably provided at approximately the center of the support shaft 33, and the actuation lever 34 is hooked by a spring 36 between it and a stopper 35 that moves in the vertical direction together with the support shaft 33. It is rotated clockwise.

Even though an actuating protrusion 37 is provided on the right side of the actuating lever 34 in opposition to the actuating pin 21 on the rewinding operating lever 19, when the playback button is operated, the support shaft 33 moves downward in the figure. The operating protrusion 37 comes close to the operating pin 21 and mechanically cooperates only when the operating lever 1
The left end 38 of 9 is the switch 3 of the main power switch 31.
It is located close to and opposite to the ON position of 1'.

The tape recorder of the present invention is constructed and operated as described above, and its operation will be described below.

FIG. 1 shows the stopped state, and when the regeneration mechanism is moved to the regeneration position by operating the regeneration button from this state, the regeneration state shown in FIG. 2 is achieved.

At this time, the first slide lever 22 moves upward against the spring 23, and at the same time the second slide lever 26 moves upward via the spring 30, and the switch 31' of the main power switch 31 is activated by the fork portion 2σ. kaON
At the same time, the support shaft 33 moves downward, and the operating protrusion 37 of the operating lever 34 approaches the operating pin 21 of the rewind operating lever 19, and the left end 38
is close to the switch 31' of the main power switch 31.

In this reproduction state, the take-up reel shaft 3 is rotated by a drive mechanism (not shown), and the supply reel shaft 4 is also rotated as the tape is wound.

Therefore, since the supply reel shaft 4 is rotating while the tape is running, the reed switch 6 is repeatedly turned on and off by the ring magnet 5 to generate a pulse signal.

However, when the tape winding is completed and the supply reel shaft 4 stops rotating, the reed switch is turned on and off.
Since the pulse signal is stopped and no pulse signal is generated, this state is detected by the switching circuit 7 and the control circuit 8 becomes operational.

Accordingly, by pressing the button in FIG. 5, the motor switch 9 connected to the circuit of the motor 2 is switched from ON to OFF, and the rotation of the motor 20 is stopped.

At this time, although the motor 2 is stopped, the regeneration mechanism remains in the regeneration position, and the main power switch 31 remains on.

Generally, at this time, even if an attempt is made to operate the rewind operation lever 19 to perform a review operation, the operation does not occur.

That is, since the motor switch 9 is OFF, the motor 2 cannot rotate but cannot rewind the tape.

According to the present invention, when the motor switch 9 is in the OFF playback state, by operating the rewind operation lever 19 to the right, the operating pin 21 is first moved to the operating lever 34 as shown in FIG. The actuating lever 3 comes into contact with the actuating protrusion 37, and the actuating lever 3
4 in the counterclockwise direction against the spring 36, the left end 38 of the operating lever 34 will temporarily switch the switch 31' of the main power switch 31 from the ON position to the OFF position.

At this time, a downward force is applied to the second slide lever 26 via the fork portion 2σ, but the first slide lever 26
It is allowed to move downward against the spring 30 connected between the two.

Turning off the main power switch 31 cuts off the power supply to the circuits 7 and 8 that detect the end of tape winding in the circuit diagram of FIG. Motor switch 9, which was set to O, is
Return to N.

Then, as the rewind operating lever 19 moves further to the right, the operating pin 21 passes over the operating protrusion 37 of the operating lever 34 as shown in FIG. 4, and the operating lever 34 is moved clockwise by the spring 36. The rotation returns to .

Therefore, the main power switch 31, which has been once turned off, is turned on again when the second slide lever 26 is returned by the spring 30, and the motor 2 starts rotating when the motor switch 9 is turned on.

On the other hand, moving the rewind operation lever 19 to the right causes the rewind lever 16 to rotate clockwise via the linear spring 20, causing the rewind idler 14 to contact the flywheel 1 and unwind. The gear 13 meshes with the relay gear 10 to rotationally drive the supply reel shaft 4, thereby making it possible to rewind and run the tape.

Therefore, through this series of operations, it is possible to perform playback, end of playback, and review.0 As described above, according to the tape recorder of the present invention, in the playback state, winding of the tape is completed and the motor is activated. Even if the tape is stopped automatically, by performing a rewind operation, it is possible to rewind the tape while the playback mechanism is in the playback position, that is, to perform a review operation. It is a device that allows the tape to be rewound immediately after winding is completed without going through a stop operation, and can be brought into a repeated playback state.
This is of high practical value in a tape recorder configured to turn off the motor switch via a control circuit when winding of the tape is completed.

[Brief explanation of the drawing]

The figures show the tape recorder of the present invention, FIGS. 1 to 4 are plan views showing the operation in different states, and FIG. 5 is a schematic circuit configuration diagram. 2... Motor 4... Supply reel shaft, 8... Control circuit, 9... Motors, one, 19... Operation lever for rewinding 21... Operating pin, 22... First Slide lever 26...second slide lever, 30...
Spring, 31... Main power switch, 33... Support shaft linked to playback operation, 34... Operating lever 37.
... Operating protrusion, 38... End.

Claims (1)

[Scope of utility model registration request] The motor switch is turned on via a control circuit that is equipped with a review mechanism and operates when it detects that the reel shaft has stopped rotating.
In a tape recorder configured for FF,
A main power switch that is turned from OFF to ON when the regeneration mechanism moves from the stop position to the regeneration position, and a main power switch that is turned from ON to OFF during review operation.
When the motor switch is turned OFF while the regeneration mechanism is in the regeneration position, the operation member temporarily turns the main power switch on by performing a review operation. O
The tape recorder is characterized in that the control circuit is made inactive by turning the FF to FF, and then the main power switch is turned ON to drive the motor and adopt a review state.