JPS6066354A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To switch tape travelling to high-speed travelling speedily and to reproduce the tape immediately after dubbing by executing normal tape travelling by a motor on the reproducing side and travelling the tape at a reverse speed as high as several times the normal tape speed by a motor on the sound recording side. CONSTITUTION:Forward rotation capstans 6, 18 are rotated by a forward rotation motor 30 on the reproducing side and backward rotation capstans 27, 34 are rotated by a backward rotation motor 37 on the sound recording side at a speed as high as 3-10 times a normal tape speed. At the time of dubbing, the tapes 4, 16 are wound around reel turntables 26, 33 and then reversely travelled at a high speed while pressing contacting pinch rollers 28, 35 against the tapes and a recording signal is read out by a head 12 in the reverse direction of the tapes and recorded on the tape 16 by a head 24. Consequently, switching to the high speed travelling is executed speedily and the tape bocomes the rewound state immediately after dubbing, so that reproducing is made possible immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording and reproducing apparatus having a dubbing function, such as a so-called cassette tape or cassette deck, which is equipped with two mechanisms having a recording or reproducing function.

Conventional configurations and their problems In recent years, the most common type of magnetic recording and reproducing device having a dubbing function for consumer cassette tapes is a chip recorder with a dubbing recording function. Most tape recorders of this type have two tape running sections, one of which is used for recording and playback, and the other for playback only.During dubbing, the first tape running section on the playback side is used. The signals of the reproduction tape to be reproduced are recorded on the recording tape by a second tape running section on the recording side that operates simultaneously.

The running speed of the cassette is normally used for dubbing (4.76 m/s), but the time required for dubbing is reduced by running the entire tape at about twice the normal running speed. There are an increasing number of things to do.

The conventional magnetic recording and reproducing apparatus described above will be explained below with reference to all the drawings.

FIG. 1 is a block diagram of a conventional magnetic recording/reproducing apparatus.

In FIG. 1, reference numeral 1 denotes a tape running section on the playback side, a cassette tape for playback mounted in the 2-digit tape running section 1, and 3
is a supply reel stand for supplying all of the tape 4, 6 is a take-up reel stand for winding the tape 4, 6 is a capstan, 7 is a flywheel fixed integrally with the capstan 6, 8 is a shaft of the motor 9 (not shown). motor pulley fixed to
10 is a belt that fully connects the flywheel and motor pulley 8; 11 is a pinch roller provided between the capstan 6 and the entire tape 4; and 12 is provided to move forward relative to the tape 4 when the tape is running. The pinch roller 11 is also configured to press against the capstan 6 at this time.

Reference numeral 13 denotes a tape running section on the recording side, which has exactly the same configuration as the tape running section 1 on the playback side. In other words, 14 is a recording cassette tape mounted in the tape running section 13;
5 is a supply reel stand for supplying the tape 16; 17 is a take-up reel stand for winding the entire tape 16; 18 capstan;
9 is a flywheel fixed integrally with the capstan 18; a 20-piece motor pulley fixed to the shaft (not shown) of a motor 21; 22 a belt connecting the flywheel 19 and the motor pulley 20; 23-piece capstan 1
A pinch roller 24 is provided to sandwich the tape 16 between the pinch roller 8 and the tape 16.
3 is also configured to be crimped onto the capstan 18.

The operation of the conventional example configured as described above will be explained below.

First, when dubbing, the tape running section 1 on the playback side. The tapes 4 and 16 run on both the tape running section 13 on the recording side. That is, each pinch roller 11.degree. 23 presses against the capstan 6.18 and clamps the tape 4.degree. 16. The tape 4.16 is driven by a capstan 6.22 via a bell) 10.22 by a motor 8, 20 rotating at a constant speed.
18 to run at a constant speed and take up the reel stand 5.1.
7. The signal recorded on the tape 4 on the playback side is read out by the playback head 12, passes through a playback equalizer amplifier and a recording equalizer amplifier (both made by Zesu Corporation), and is recorded on the tape 16 on the recording side by the recording head 24. When dubbing at high speed, each motor 8, 20
'I will rotate it at high speed and achieve all of this.

However, when dubbing is carried out by running the tape at high speed, the following disadvantages occur in all layers.

First, in order to perform normal tape running speed and high-speed running during dubbing, it is necessary to change the rotational speed of the motor at all times, but it is not possible to instantly stabilize it at the specified speed due to the inertia of the flywheel Otsu 19. This is impossible, and it is not possible to check the recorded content by playing it back at normal speed immediately after dubbing is completed.

Second, since the tape is at the end of the winding when dubbing is finished, it must be rewound in order to play back and confirm.

Thirdly, since the motor 9.21 must be controlled at all two speed levels, a large amount of cost is required for the control.

Fourthly, in order for the motor to rotate stably, there are upper and lower limits for the number of revolutions, and the total number of revolutions must be determined according to these limits.
．． It is necessary to ensure a certain level of performance for rotational unevenness of No. 18, and for these reasons, the tape speed during high-speed running has been limited to 2 to 3 times the normal tape running speed.

Sixth, the advancement of the head 12.24 is caused by the capstan 6.1
In the mechanism that is driven by the rotational force of the capstan 6.18, the speed at which the head 12.24 advances toward the tape 4.16 increases in proportion to the number of rotations of the capstan 6.18, which can cause problems such as click noise. Because of this problem, the rotational speed during high-speed running was limited to two to three times the normal rotational speed.

OBJECTS OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and allows immediate switching between normal running and high-speed running, making it possible to increase the tape running speed at high speed to about 3 to 10 times the normal speed, and after dubbing is completed. Normal playback can be started immediately without rewinding, and even with a mechanism that uses the rotational force of the entire capstan to advance the head, the head advancement speed can be kept constant to improve operability and performance. The overall purpose is to provide a complete magnetic recording and reproducing device capable of recording and reproducing information.

Structure of the Invention In order to achieve the above object, the magnetic recording and reproducing apparatus of the present invention includes a first mechanism having at least a reciprocating reproducing function and a second mechanism having at least a reciprocating reproducing function. A first capstan for normal rotation running and the second capstan.
A second capstan for normal rotation of the mechanism and a first motor for normal rotation are connected by a belt, and a third capstan for reverse rotation of the first mechanism and the second motor are connected by a belt. The fourth capstan for reversing the mechanism and the second capstan for reversing the mechanism.
The tape feeding speed of the first capstan and the second capstan is connected to the motor by all the belts, and the tape feeding speed of the third capstan and the fourth capstan is set to the first tape feeding speed. The configuration is such that all nine speeds are used at the second tape feeding speed.

With this configuration, it is possible to ensure stable performance at normal speed, instantaneous speed switching from normal speed to high speed, and eliminate rewinding operation after dubbing. An example will be explained with reference to all the drawings.

FIG. 2 is a block diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention.

In Figure 2, the same parts as in Figure 1 are given the same numbers.
B opening sound is omitted. First, 26 is a first reel stand that is provided in the tape running section 1 and supplies the tape 4 during normal running, and 26 is also provided within the tape running section 1 and supplies the tape 4 during normal running.
The second reel stand takes all the windings, 2γ is the capstan for reversing the tape 4 during dubbing, 28 is the capstan 2
7 is a pinch roller that presses the tape 4; 2e is a flywheel that is integrally fixed to the capstan 27;
a forward rotation motor for normally running the 3o tape 4;
Reference numeral 31 denotes a motor guide fixed to the shaft (not shown) of the normal rotation motor 30.

Further, the tape running section 13 on the recording side is constructed in the same manner, and 32 is a third reel stand provided in the tape running section 13 and supplies the entire tape 16 during normal running, and 33 is a third reel stand provided inside the tape running section 13. The tape 16 is provided during normal running.
4th reel stand that takes all the rolls, 34 is the tape 16 when dubbing
35 is a pinch roller that faces the capstan 34 and presses the tape 16; 3;
6 is a flywheel fixed integrally with the capstan 34, 37 is a reversing motor for running the tape 16 at high speed in the opposite direction to the normal running direction, and 38 is a reversing motor 37.
A motor pulley fixed to a shaft (not shown) of 3
9. 40 is a belt 41 which is connected to the motor pulley 31 of the forward rotation motor 30, the playback side forward rotation flywheel 7, and the recording side forward rotation flywheel 19, respectively;
, 4.2 is a belt connecting the motor 93 of the reversing motor 37 to the reversing flywheel 29 on the playback side and the reversing flywheel 36 on the recording side, respectively.

The playback head provided on the tape running section 1 on the playback side is connected to the recording head 24 provided on the tape running section 13 on the recording side via a playback equalizer and a recording equalizer (both not shown)'ft. electrically connected. In addition, the capstans 18 and pinch rollers 11, 23 used during normal running, and the capstans 27, 34 and pinch rollers 28, 35 used during high-speed running are different depending on normal running and continuous running. selective tape 4
It is constructed so as to sandwich the angle 16°.

The operation of this embodiment in which +114 is obtained as described above will be explained below.

Capstan 6.18 for forward rotation on the playback side and recording side without switching
It is driven by the forward rotation motor 30 and constantly rotates counterclockwise at the normal tape running speed (t576C1n/S). On the other hand, the reversing capstans 2γ and 34 on the playback side and the recording side are driven by the reversing motor 37, and the tape running speed is several times higher than the normal tape running speed (in some cases, it can be about 10 times faster). It is constantly rotating L~ in the half-splitting direction.

During normal playback, the pinch roller 4 on the playback side presses against the capstan 6 to fully grip the tape 4 and run the tape 4 at a normal speed. 4 tape 2nd reel stand 26
and is wound onto the first reel stand 26. At this time, a reproduced signal is obtained from the head 12.

Incidentally, by operating the tape running section 13 on the recording side in the same manner, it is possible to electrically switch the head 24 and obtain a reproduction signal.

Next, dubbing will be explained.

1. First, both the cassette tape 2 for reproduction and the cassette tape 14 of recording month 1 are fast-forwarded to wind up the entire tape 4° 16 on the second reel stand 26 and the fourth reel stand 33. After that, the playback side and the recording gag, respectively.
Pinch roller 28, 36 Kacabuzu tongue 27.34
Crimp the tape 4.16'i, sandwich the tape 4,
16i The car is running at several times the normal speed. At this time, the pinch rollers 11 and 23 for normal running are connected to the capstan 6.
The tapes 4 and 16 are wound on the first reel stand 25 degrees and the third reel stand 32, respectively.

The recorded signal on the tape 4 is read out by the head 12VCj, and is passed through a playback equalizer and a recording equalizer (both not shown).
The signals are then simultaneously recorded on the tape 16 by the recording head 24. The signal on tape 4 read at this time is
The track signals read out during normal playback are read out from the end of the tape 4 in the opposite direction to the normal direction.

When dubbing is completed, the recording side cassette tape 14 is in a rewound state, so only the recording side pinch roller 23 is pressed against the capstan 18, and the dubbed message 3 on the tape 16 is read out from the head 24. This allows you to immediately play back and check the contents.

As described above, in this embodiment, the tape is driven by the independent motors 30 and 37 to achieve the normal tape running speed on the forward rotation side and several times the normal tape running speed on the reverse rotation side. Therefore, at the end of dubbing, the tape is rewound and the tape can be played back and checked immediately without having to rewind it. Therefore, compared to the conventional motor which determines the running speed by switching the entire rotation speed of the motor, the time required for the rotation speed to become stable is unnecessary.

In addition, the motors 30 and 37 only need to be controlled in series, which prevents an unnecessary increase in cost. At the same time, the rotational speed of each motor 30 and 37 can be set to the optimum value by changing the transmission ratio, allowing normal tape running. Speed (a, 76C
rrL/S), the performance does not deteriorate in any way, and there is no need to extremely increase the rotational speed of the high-speed motor 37 itself.

Furthermore, even if the tape running section has a mechanism in which the head advances relative to the tape using the rotational force of the capstan, problems such as differences in the forward speed of the head during normal playback and high-speed dubbing do not occur.

In this embodiment, the capstan 6.18 for forward rotation and the motor 30 for forward rotation are used to obtain normal running speed, and the capstan 27.34 for reverse rotation and the motor 37 for reverse rotation are used to obtain high speed running during dubbing. However, there is no problem even if the traveling speed is set in the opposite direction.

Further, in order to completely prevent periodic changes in the erite tape wow due to manufacturing errors or other causes, the rotational speed of the flywheel may be varied, and the outer diameter of the capstan may be changed depending on the rotational speed.

Effects of the Invention As described above, the magnetic recording/reproducing apparatus of the present invention provides the following effects.

(b) Since the normal tape running speed and the tape running speed during dubbing have independent running machines, the tape is rewound at the end of dubbing and can be immediately played back without needing to be rewound. Compared to the conventional method in which the running speed is determined by changing the motor's rotational speed, the time required for the rotational speed to stabilize is unnecessary.

(b) Each motor only needs to be controlled in series, which can prevent (1) and (2) unnecessary cost increases due to conversion to other speeds.

e→ The rotation speed of each motor can be set optimally by changing the transmission ratio, and the normal tape running speed (4
, -r 6cm/S), and even for high-speed motors,
There is no need to extremely increase the rotation speed of the motor itself.

B) Even if the tape running section has a mechanism that uses the rotational force of the entire cab stan for forward movement of the head, problems such as the difference in the forward speed of the head during normal playback and high-speed dubbing do not occur.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional magnetic recording and reproducing apparatus, and FIG. 2 is a block diagram of a magnetic recording and reproducing apparatus according to an embodiment of the present invention. 1...Tape running section on the playback side, 6.1B, 27
゜34...Capstan, 13...Tape on recording side - [S, 39-42...
belt. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (2)

[Claims] (1) a first mechanism having at least a reciprocating regeneration function;
a second mechanism having at least a reciprocating recording function; a first capstan for normal rotation of the first mechanism; a second capstan for normal rotation of the second mechanism; A first motor for reversing travel is connected by a belt, and a third capstan for reversing travel of the first mechanism, a fourth capstan for reversing travel of the second σ mechanism, and a fourth capstan for reversing travel of the second σ mechanism. A second motor is connected with a belt so that the tape feeding speed of the first capstan and the second capstan is a first tape feeding speed, and the tape feeding speed of the third capstan and the fourth capstan is A magnetic recording/reproducing device in which a second tape feeding speed is a Chive arbitrary speed. (2) The rotation speed of the first capstan of the first mechanism and the second
A configuration in which the rotation speed of the second capstan of the mechanism is different from that of the second capstan, or the rotation speed of the third capstan of the first mechanism and the rotation speed of the fourth capstan of the second mechanism are different from each other. A magnetic recording and reproducing apparatus according to claim 1, which satisfies one or both of the following configurations.