JPS6037713Y2 - tape recorder - Google Patents

Description

[Detailed description of the invention] The invention is a so-called two-motor tape recorder that is equipped with two motors, one of which drives the capstan and the other motor drives the reel shaft. In 2
The aim is to add an automatic track interval detection mechanism without sacrificing the simplicity of the mechanism, which is a feature of motorized tape recorders.

In recent years, it has become common knowledge that tape recorders are equipped with an automatic track interval detection mechanism, and it has become indispensable, especially for high-end two-motor tape recorders.

This automatic song interval detection is performed by moving the tape at high speed (with the tape slightly in contact with the magnetic head), so the magnetic head is slightly backward from the playing position with respect to the tape, but forward from the non-playing position. .

Therefore, the so-called head slide plate on which the magnetic head is mounted and which moves the magnetic head forward or backward must be provided with a third stop position between the playing position and the non-playing position.

Therefore, in the past, a mechanism for providing the third stop position was separately provided, making the structure complicated, and the simplicity of the mechanism, which is a characteristic of the two-motor tape recorder, was impaired.

The present invention eliminates the drawbacks of the conventional example, and one embodiment will be described in detail below with reference to the drawings.

In Figures 1 and 2, 1 is a head slide plate on which an erasing head 2, a playback (recording) head 3, and a pinch roller 4 are mounted near the retreating end of the upper surface, and a base 5 is mounted in the center. A guide slot 7 for loosely fitting into the provided guide pin 6.6,
7 are arranged substantially on the same straight line.

Further, a piston 9 of an electromagnetic plunger 8 for moving the head slide plate 1 forward is engaged at the forward end, and a piston 9 of an electromagnetic plunger 8 is engaged at the backward end for moving the head slide plate 1 backward when the electromagnetic plunger 8 is de-energized. A tension spring 10 is tensioned.

Furthermore, near the center is a planetary gear 11 as a transmission wheel, which will be described later.
A control hole 14 is formed in which a rectangular figure-9 notch 13 whose width gradually becomes narrower in the backward direction is formed, through which the upper end of the revolution shaft 12 is inserted and guided and controlled.

Furthermore, a cam piece 17 for controlling a shaft 16 of an idler 15, which will be described later, extends to the right.

A reel driving motor 18 is fixed to the base 5 via a buffer member (not shown), and the rotating force of the motor 18 is transmitted to the base 5 via a motor pulley 19, a belt 20, and a pulley 21. The signal is transmitted to a rotary shaft 22 which is held movably.

A relay gear 23 as a drive wheel is provided at the upper end of the rotation shaft 22.
is fitted, and one end of a lever 24 is rotatably attached to the lower part of the relay gear 23.

The other end of the lever 24 rotatably holds the revolution shaft 12 of the planetary gear 11, which is provided to be able to revolve while meshing with the relay gear 23, and the planetary gear 11 and the lever 2
A compression spring 25 is interposed between the spring 4 and the spring 4.

Further, the upper end of the revolution shaft 12 passes through the control hole 14 of the head slide plate 1 so as to cooperate with the control hole 14.

26 and 27 are gears for driving the left and right reel shafts 28 and 29, respectively, and when the planetary gear 11 revolves clockwise in the figure from the neutral position, it meshes with the gear 26 on the left side and rotates from the neutral position in the figure. When it revolves counterclockwise, the gear 27 on the right
It is designed to mesh with the

Further, a reel pulley 30 having approximately the same diameter as the gear 27 is fitted to the lower part of the gear 27 on the right side.

15 transfers the rotational force of the capstan 31 to the reel pulley 3
The shaft 16 of the idler 15 selectively engages with the cam piece 17 of the head slide plate 1, so that the head slide plate 1 moves to the forward position. That is, only when the player is in the performance position, the rotational force of the capstan 31 is transferred to the reel shaft 2 via the idler 15.
9.

The above is the configuration of the present invention, and its operation will be explained in detail below.

First, in FIG. 1, when the tape recorder is in a stopped state, the electromagnetic plunger 8 is not energized, and therefore the head slide plate 1 is retreated by the tension spring 10 to the non-playing position.

At this time, since the reel drive motor 18 is also not energized, the planetary gear 11 stands still and the revolution shaft 12 remains stopped at approximately the center of the control hole 14, that is, at a neutral position between the magnetic tapes.

Further, since the cam piece 17 of the head slide plate 1 drives the idler shaft 16 to the right, the idler 15 does not come into contact with either the capstan 31 or the reel pulley 15, and no rotational force is applied to the reel shaft 29.

Next, the case of setting the tape recorder to the playback (recording) state will be explained.

At this time, the reel drive motor 18 is not energized and the planetary gear 11 is stopped and remains in the neutral position.
It is facing 3.

Therefore, when the electromagnetic plunger 8 is energized by a playback (recording) operation, the notch 13 of the control hole earthwork
The head slide plate 1 moves forward from the non-performance position to the performance position against the tension spring 10.
When the magnetic heads 2 and 3 come into contact with the tape, the pinch roller 4 comes into pressure contact with the capstan 31, resulting in the state shown in FIG. 3.

When the head slide plate 1 moves forward to the playing position and the idler shaft 16 comes off the cam piece 17, the idler 1
5 is moved leftward by leftward moving means (not shown) and comes into contact with the capstan 31 and reel pulley 30, the rotational force of the capstan 31 is applied to the right reel shaft 29, and the tape 32 is It is wound onto the right reel.

Next, in FIG. 4, when the tape of the tape recorder is simply being transported at high speed, no electricity is supplied to the electromagnetic plunger 8, and therefore the head slide plate 1 is retracted, so the idler shaft 16 is driven rightward by the cam piece 17 as in the stopped state, and the rotational force of the capstan 31 is not applied to the right reel shaft 29.

When the tape 32 is in the so-called 1 fast forward state, electricity is supplied so that the reel drive motor 18 rotates counterclockwise, and the relay gear 23 is rotated counterclockwise via the belt 20 and pulley 21. The rotational force is given.

When a counterclockwise rotational force is applied to the relay gear 23, the planetary gear 11 meshing therewith rotates clockwise,
Under the resistance of a compression spring 25 installed between the lever 24 and the lever 24, the lever 24 rotates counterclockwise around the relay gear 23 together with the other end of the lever 24, and the right reel shaft driving gear 27
mesh with.

When the planetary gear 11 and the reel drive gear 27 mesh with each other, the planetary gear 11 is prevented from revolving and only rotates on its own axis.

Therefore, a counterclockwise rotating force is applied to the reel driving gear 27, and the tape 32 is wound onto the right reel.
It goes into fast forward mode.

At this time, since the head slide plate 1 is retracted, the magnetic heads 2, 3 and the tape 32 do not come into contact with each other, and the revolution axis 12
The upper end does not touch the control hole 1.

When the tape 32 is in the so-called one rewind state, it is the same as the one fast forward state, but the rotation direction of the reel drive motor 18 is clockwise, and therefore the planetary gear 11 also revolves clockwise - to the left. Since the reel shaft 28 rotates clockwise, the tape 32 is wound onto the left reel.

Next, in FIG. 5, when automatic song interval detection is performed while the tape recorder is in the so-called 1 cue 1 state, the magnetic heads 2 and 3 are moved forward slightly and lightly touch the tape 32 even though the tape recorder is in the 1 fast forward state. I need to let it happen.

Therefore, the head slide plate 1 must be in a third position, which is behind the playing position and in front of the non-playing position.

Therefore, when the reel drive motor 18 is rotated counterclockwise and the electromagnetic plunger 8 is then operated, the planetary gear 11 meshes with the pulley shaft drive gear 27 on the right side, so that the upper end of the revolution shaft 12 is connected to the head slide plate. 1 control hole 1 (
The head slide plate 1 cannot move forward any further and stops at the third position, the magnetic heads 2 and 3 lightly contact the tape 32, and the pinch roller 4 touches the cap. The player is separated from the stun 31, and automatic song interval detection becomes possible.

At this time, the idler shaft 16 is pushed slightly to the right by the cam piece 17, and the rotational force of the capstan 31 is not applied to the reel shaft 29.

Also, when automatic song interval detection is performed while in the so-called Review state, it is the same as in the case of the 1-Keyway described above, only that the rotation direction of the reel drive motor 18 is clockwise.

In addition, when transitioning from the 1-Kyuyo state to the playback state, the power to the reel drive motor 18 is cut off, and after the power to the electromagnetic plunger 8 is stopped and the head slide plate 1 is moved back, it is attached to the right reel shaft 29. When the pulled pulley 30 is driven by the capstan 31, the right reel driving gear 27 is rotated counterclockwise, and the planetary gear 11 is kicked out clockwise by the rotational force, so that the head slides. Even when the plate 1 moves forward, the upper end of the revolution shaft 12 enters the notch 13 of the guide hole 14 and does not prevent the head slide plate 1 from moving forward.

According to the present invention, as described above, the third stopping position can be given to the magnetic heads 2 and 3 by simply forming the control means on the planetary gear 11 as a transmission wheel and the head slide plate 1, so that the third stop position can be provided to the magnetic heads 2 and 3. It is possible to realize a tape recorder that is inexpensive, has few failures, and is highly reliable, without sacrificing the simplicity of the mechanism that characterizes the one-tapered tape recorder.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view showing the main parts in a stopped state, and FIG.
3 is a view sectional view, FIG. 4 is a playback (recording) state, FIG. 4 is a 1 fast forward state, and FIG. 5 is a plan view showing the main parts in a so-called 1 kyuyo state. 1... Head slide plate, 2, 3...
Magnetic head, 11... Planetary gear, 12...
...Revolution axis, 14... Control hole, 18...
・Reel drive motor, 23...Relay gear, 2
4... Lever 28... Reel shaft.

Claims (1)

[Scope of utility model registration request] A drive wheel that is rotated by a reel drive motor during high-speed tape operation, a transmission wheel that is displaced from a neutral position to a rotationally connected position with either the left or right reel shaft in response to the rotational direction of the drive wheel, and a playback operation. moving the magnetic head and pinch roller to a playing position where they are in contact with the tape and capstan;
In addition, when the stop operation is performed, the head slide plate takes a non-playing position away from the contact, and the control means provided on the transmission wheel and the head slide plate, and the control means controls the transmission wheel to move to the neutral position. In a certain state, the head sliding plate is allowed to move to the playing position, and in a state where the transmission wheel is in the rotational connection position, the head sliding plate is moved from the non-playing position toward the playing position, and the magnetic head is brought into contact with the tape. A tape recorder characterized in that the pinch roller is set at a third position spaced apart from the capstan.