JP2661612B2 - Recording and playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus suitable for recording / reproducing a video tape.

[0002]

2. Description of the Related Art FIG. 6 is a schematic diagram of a conventional magnetic recording / reproducing apparatus. A magnetic tape 104 wound around a supply reel 102 and a take-up reel 103 of a tape cassette 101 is formed by
The tension pole 105 which moves in the direction of the arrow, the supply side loading pole (hereinafter, referred to as “SP loading pole”)
TU) 106 and a take-up side loading pole (hereinafter, referred to as a “TU loading pole”) 107 and wound around a rotating drum 108.

[0003] As shown in the figure, a rotating drum 108 is inclined to realize an oblique scanning method. For this purpose, it is necessary to twist the magnetic tape 104 with a supply-side inclined pole (hereinafter, referred to as “SP inclined pole”) 110 and return the twist and height with a winding-side inclined pole (hereinafter, referred to as “TU inclined pole”) 111. is there.

The winding angle of the magnetic tape 104 on the SP inclined pole 110 and the TU inclined pole 111 is about 60 °, and the tape running load is large.

[0005]

In recent years, it has been necessary to make the magnetic tape 104 thinner due to longer recording time. But,
As described above, the running load on the inclined pole is an obstacle.

Accordingly, an object of the present invention is to provide a technique capable of reducing the running load of a tilt pole.

[0007]

According to the present invention, there is provided a tape cassette containing a magnetic tape.
Extend the horizontal chassis to be mounted to the entrance side of the rotating drum,
A downwardly sloped chassis is connected to this horizontal chassis.
Formed on the outlet side of the rotating drum, these horizontal chassis
The rotating drum rotatably provided between the inclined chassis and the chassis
As it moves away from the tape cassette, it is almost
While tilting down in one direction,
A supply-side loading pole is located just before the rotary drum entrance.
The supply side inclined poles are arranged in order, and at the outlet of the rotating drum
A take-up loading pole is placed on the inclined chassis
And tilted downstream from the take-up loading pole.
The take-up side tilt port is located near the boundary between the surface chassis and the horizontal chassis.
The recording / reproducing device is configured by disposing the
Magnetic tape that has been twisted with a screw and lowered along the rotating drum
Follow the inclined chassis after the loading pole on the take-up side.
And gradually raise the magnetic force with the take-up side tilt pole.
The tape was twisted back.

[0008]

The magnetic tape is twisted by the supply-side inclined pole and lowered along the rotating drum. Next, the magnetic tape is gradually raised along the inclined surface chassis after the winding side loading pole, and the twist of the magnetic tape is returned by the winding side inclined pole. Therefore, the magnetic tape at the supply side inclined pole
The wrap angle can be reduced, and the wrap angle is small,
Winding angle for rewinding the magnetic tape on the winding side
Can reduce the running load of the magnetic tape
You. Also, take up the magnetic tape on the
As it was gradually raised along the inclined chassis in descending, magnetic
The durability of the tape can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals.

FIG. 1 is a plan view of a recording / reproducing apparatus according to the present invention. A chassis 2 of the recording / reproducing apparatus 1 includes a horizontal chassis 2a,
It is characterized by comprising an inclined surface chassis 2b extending downward from the horizontal surface chassis 2a. 2c is a boundary line changing from a horizontal plane to an inclined plane, and 2d is a step.

A TU pole base 5 for moving the TU loading pole 4, a TU guide groove 6, a TU impedance roller 7, an AC head (audio / control head) 8, a capstan 9, and a TU inclination are provided on the inclined surface chassis 2b. A pole 10 and the like are attached.

On the other hand, in the horizontal plane chassis 2a, the tape cassette setting section 11, tension pole 12, erasing head 14, SP pole base 15, SP guide groove 16, S
The auxiliary loading pole 20 is provided at the portion (right side in the figure) beyond the P impedance roller 17 and the slope chassis 2b.
An auxiliary pole base 21, an auxiliary guide groove 22, and the like for moving the arm are mounted.

As shown, the inclined rotary drum 18 is arranged between the horizontal chassis 2a and the inclined chassis 2b. Further, the rotating drum 18 has its upper surface in a direction away from the tape cassette 30 and closer to the supply-side inclined pole,
In other words, the slope is set to decrease in the direction indicated by the arrow A in the figure. The inclined surface chassis 2b is also inclined downward in substantially the same direction as the upper surface of the rotary drum 18.

The SP pole base 15 is forcibly moved by the SP arm 24, the TU pole base 5 is forcibly moved by the TU arm 25, and the auxiliary pole base 21 is forcibly moved by the auxiliary arm 26.

FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. The SP loading pole 28 attached to the SP pole base 15 moving on the horizontal chassis 2a is perpendicular to the horizontal chassis 2a, whereas the SP tilt pole is 29 is inclined at a constant angle.

FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1. Only the TU loading pole 4 is mounted on the TU pole base 5 that moves on the inclined chassis 2b. The TU loading pole 4 is perpendicular to the inclined chassis 2b. 2 and 3 show the arms 24 and 24 for easy explanation.
25 etc. were omitted.

The operation of the recording / reproducing apparatus having the above configuration will be described below. FIG. 4 is a diagram for explaining the operation of the recording / reproducing apparatus according to the present invention.
, The arrow is pulled out by the TU loading pole 4, and the arrow is pulled out by the auxiliary loading pole 20 as indicated by the arrow. In the figure, L1 and L2 are cross lines. This means that the magnetic tape 31 having the same height as the tape cassette 30 starts to descend at the cross line L1 or L2.

In the TU-side tape path from the rotary drum 18 outlet to the tape cassette 30, various members such as an AC head 8, a capstan 9, and a TU inclined pole 10 must be arranged. Further, the distance from the rotating drum 18 to the AC head 8 is set to a fixed distance for compatibility with other devices. For this purpose, it is well known that the length of the TU-side tape path needs to be a predetermined length. SP tilt pole 29 and TU tilt pole 1
In order to reduce the tape wrap angle to zero as much as possible, it is also important to dispose the inclined poles 10, 29 near the cross lines L1, L2.

Therefore, in this embodiment, as described above, the rotating drum 18 is inclined in a direction away from the tape cassette 30 and closer to the SP inclination pole, and the cross lines L1 and L2 are positioned as shown in FIG. By disposing the SP tilt pole 29 and the TU tilt pole 10 on the cross lines L1 and L2, the tilt poles 10,
In addition to reducing the tape winding angle around the tape 29, a TU-side tape path of a required length is secured in the inclined surface chassis portion on the side of the rotary drum 18, and various members are arranged in the TU-side tape path. And Thus, even in the tape path including the horizontal chassis 2a and the inclined chassis 2b, the rotary drum 18 is arranged in front of the SP-side reel of the tape cassette 30 in the same manner as in the conventional M loading method (see FIG. 6). Then, a TU-side tape path is formed in front of the TU-side reel toward the side of the rotary drum 18,
A small space can be realized, and the tape running load is greatly reduced. The supplementary description of the tape winding angle and the tape running load will be given later.

The magnetic tape 31 is twisted at the SP inclined pole 29 in contact with the cross line L1. As shown in the figure, the winding angle of the tape on the SP inclined pole 29 is small, for example, about 20 °, which is １ ／ of the conventional angle of about 60 °, so that the tape running load is very small.

The TU in contact with the cross line L2
The twist of the magnetic tape 31 is eliminated by the inclined pole 10, but the tape wrap angle of the TU inclined pole 10 is about 30 °, which is ゜ of the conventional angle of about 60 °, so that the tape running load is reduced by half. .

The reason why the wrap angle of the inclined poles 10, 29 is greatly reduced will be described below. It is well known that when the height difference between the TU loading pole 4 and the SP loading pole 28 is small, the inclination angle of the rotary drum 18 is increased to perform predetermined recording on a magnetic tape. In this embodiment, as shown in FIG. 3, since the TU loading pole 4 is sufficiently lower than the SP loading pole 28, it is not necessary to tilt the rotary drum 18 much. The SP tilt pole 29 corresponds to the small tilt angle of the rotating drum 18.
It is not necessary to twist the tape strongly, so that the tape winding angle at the SP inclined pole 29 may be small.

On the other hand, in order to return the magnetic tape 31 lowered to the TU loading pole 4 in FIG. 3 to its original height in a short section, it is necessary to strongly twist the magnetic tape with the TU inclined pole. However, in the present embodiment, after the height of the magnetic tape 31 is gradually corrected by the inclined surface chassis 2b, the magnetic tape 31 is only slightly twisted by the TU inclined pole 10, so that the tape winding angle on the TU inclined pole 10 is small. Good.

FIG. 5 is a diagram showing another embodiment of the recording / reproducing apparatus according to the present invention, wherein a capstan 9 is arranged after a TU inclined pole 10 in FIG. As a result, the capstan 9 and the pinch roller 33 cooperating therewith can be arranged on the horizontal chassis 2a, so that the so-called pinch roller pressing mechanism can be simplified, and the height of the recording / reproducing apparatus 1 can be reduced. The capstan 9 is generally provided with a relatively large flywheel, which is horizontally rotated. Therefore, placing the flywheel under the horizontal chassis 2a is effective in reducing the height of the recording / reproducing apparatus 1.

[0025]

As described above, the present invention provides a magnetic tape.
Horizontal chassis with a tape cassette containing
Extend to the inlet side of the rotating drum and connect to this horizontal chassis
Contact and place the down slope chassis on the exit side of the rotating drum
Formed between these horizontal and inclined chassis
Separates the rotatable rotary drum from the tape cassette
As it descends in the same direction as the inclined chassis.
At the same time as tilting, just before the rotary drum entrance of the horizontal chassis
Supply side loading pole and supply side inclined pole
Arranged in order, on the inclined chassis facing the outlet of the rotating drum
Place the take-up side loading pole and
Sliding chassis and horizontal chassis downstream from the loading pole
Position the take-up side slope pole near the boundary of the
A raw device is constructed, twisted by a supply side tilt pole and
Load the magnetic tape that has descended along the ram
After Gpole, gradually rise along the slope chassis,
And the twist of the magnetic tape is returned by the take-up side inclined pole.
I did it. Extend the horizontal chassis to the entrance side of the rotating drum
And connect it to the horizontal chassis to
A chassis is formed at the outlet side of the rotating drum, and the rotating drum is
As we move away from the cassette,
To reduce the winding angle of the magnetic tape on the supply side inclined pole.
Because the winding angle is small, the magnetic
The winding angle for twisting back the tape is small and the magnetic tape
The running load of the loop can be reduced. In addition, magnetic
Ramp on the take-up loading pole
Along the length of the magnetic tape,
Can be improved.

Also, one inclined pole is disposed on each of the supply side and the winding side, the inclined pole on the winding side is in contact with the magnetic surface side of the magnetic tape, and the inclined pole on the supply side is positioned on the diamagnetic surface side of the magnetic tape. In the abutment, the winding-side inclined pole can be fixed to the chassis. Therefore, the take-up side tilt pole has good mounting accuracy, and the one placed on the movable pole base has less restrictions on loading, making it easier to design.
The degree of freedom in design also increases.

Then, along the running direction of the magnetic tape,
Arrange the capstan and the take-up side tilt pole in this order,
When the capstan is disposed on the inclined chassis, that is, when no inclined pole is provided between the rotating drum and the capstan, the load acting on the capstan is reduced.

On the other hand, when the take-up inclined pole and the capstan are arranged in this order along the running direction of the magnetic tape, and the capstan is arranged on the horizontal chassis, the load on the capstan is increased, but the horizontal chassis is increased. A capstan and a pinch roller can be arranged on top. Since the flywheel associated with the lower portion of the capstan can be mounted horizontally, the height can be reduced and the assembly is easy, as compared with the case where the flywheel is mounted on an inclined chassis.

[Brief description of the drawings]

FIG. 1 is a plan view of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1;

FIG. 3 is a view taken in the direction of arrow 3 in FIG. 1;

FIG. 4 is a diagram illustrating the operation of the recording / reproducing apparatus according to the present invention.

FIG. 5 is a diagram showing another embodiment of the recording / reproducing apparatus of the present invention.

FIG. 6 is a schematic diagram of a conventional magnetic recording / reproducing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Recording / reproducing apparatus, 2 ... Chassis, 2a ... Horizontal plane chassis,
2b: inclined surface chassis, 2c: boundary line, 4: winding side loading pole (TU loading pole), 9: capstan, 10: winding side inclined pole (TU inclined pole), 18: inclined rotating drum, 28 ... supply side loading pole (SP loading pole), 29 ... supply side inclined pole (SP inclined pole), 30 ... tape cassette, 31 ... magnetic tape, A ... inclined direction of rotary drum.

Claims (1)

(57) [Claims] 1. A tape cassette containing a magnetic tape.
Horizontal chassis to be mounted extends to the entrance side of the rotating drum
Connected to this horizontal chassis
A plate is formed on the outlet side of the rotary drum, and
The rotation provided rotatably between the chassis and the inclined chassis
As the transfer drum moves away from the tape cassette,
When inclined downhill in almost the same direction as the inclined chassis
In both cases, the horizontal chassis is provided just before the rotary drum entrance.
Supply side loading pole and supply side inclined pole are arranged in order.
Placed on the inclined chassis facing the outlet of the rotating drum.
Set the loading pole on the take-up side
Downstream from the ding pole, the slope chassis and the horizontal
Place the take-up side slope pole near the boundary of the surface chassis
And twisted by the supply-side inclined pole to follow the rotating drum.
The magnetic tape lowered by the
After Gpole, gradually rise along the slope chassis.
And take-up of the magnetic tape with the winding-side inclined pole.
A recording / reproducing apparatus characterized in that the twist is reversed.
Place.