JP2693044B2 - Recording or 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 or reproducing device, and more particularly to a recording or reproducing device having an impedance roller for suppressing vibration of a tape.

[0002]

2. Description of the Related Art One of the problems with a magnetic recording / reproducing apparatus (VTR) in which a magnetic tape is wound around a rotating drum (hereinafter referred to as "drum") equipped with a head to record and reproduce a video signal, Time-axis fluctuations include so-called jitter. There are many possible causes of this jitter, such as uneven rotation of the drum and speed fluctuations of the tape. In recent years, as the number of heads has increased due to high-density recording, the tape when the heads come into contact with the tape vibration,
Tape vibration due to the hitting of the head has also become a major factor.

A general method for preventing such tape vibration is as follows. That is, as shown in FIG. 5, a roller with a large mass (hereinafter referred to as an impedance roller) 37, which is erected on a chassis (not shown) so as to be arranged between the main inclined post 38 and the vertical post 39 at the time of loading the tape, is installed. This is a method of contacting the tape 34 and absorbing the vibration.

[0004]

However, when it is attempted to absorb the vibration by hitting the head, it is most effective to dispose the vibration at a position closest to the vibration source, that is, immediately before and after the drum.

Considering the case of the loading system as shown in FIG. 5, it is not possible to vertically arrange the impedance roller 37 between the drum 35 and the main inclined posts 38 and 38 'immediately before and after the drum 35. However, there is a problem that the space is very unreasonable, and even if it can be arranged, there is not enough space to make sufficient mass. Further, since the tape length between the drum 35 and the impedance roller 37 is required to some extent to dispose the impedance roller 37 in this way, the tape path is set to the cassette 3
There is a problem in that the drum 35 extends to the side opposite to 1, and the inclination of the drum 35 becomes large in order to establish the tape path. In addition, the area occupied by the tape path increases, leading to a larger layout.

In view of the above problems, it is an object of the present invention to provide a recording or reproducing apparatus in which an impedance locus having a sufficiently large mass can be arranged at a position as close to the drum as possible.

[0007]

According to the present invention, an impedance roller contacts the tape from the inside of the tape path when the tape loading is completed.

Further, at the time of completion of tape loading, an impedance roller is positioned between at least one of the posts immediately before and after the rotating drum in the tape path and the drum, and abuts against the tape from the inside of the tape path. I was allowed to.

Further, the impedance roller is moved in association with the tape loading operation.

Furthermore, the impedance roller is erected on the skates together with the inclined posts for winding the tape around the rotary drum, and is moved by the skates.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 are views for explaining the tape path of the VTR in this embodiment. FIG. 1 shows an unloading state and FIG. 2 shows a loading state.
The loading method is a so-called M loading method, in which all the moving posts move parallel to the reference plane and the tape is wound around the drum in a substantially symmetrical manner.

In the figure, reference numeral 1 is a cassette, and a supply side reel 2
The tape 4 is wound between the reel 3 and the take-up reel 3.
Reference numeral 5 denotes a rotary drum equipped with a magnetic head, which is inclined at a predetermined angle in the 9 o'clock direction. Reference numeral 6 denotes an entrance-side inclined post for defining the approach direction of the tape 4 with respect to the rotary drum 5, and reference numeral 7 denotes an entrance-side vertical post that defines the height of the drum entrance side. The posts 6 and 7 are also planted on the entrance-side skates 8. Reference numeral 9 denotes an outlet side inclined post for defining the tape output direction from the drum 5.
Is a vertical post on the outlet side that defines the height of the tape on the outlet side of the drum. Reference numeral 11 denotes an impedance roller which is the subject of the present invention, the structure of which will be described later, but the exit side skate 1
It is erected on the shaft 2 via a shaft 33. The posts 9 and 10 are also erected on the skates 12.

The inlet-side and outlet-side vertical posts 7 and 10 are provided with flange portions 10a (see FIG. 3) for restricting movement of the tape in the width direction. The guide portion 10b (see FIG. 3) with which the tape surface contacts is a rotating roller. On the other hand, the impedance roller 11 is also a rotating roller, and the inlet-side and outlet-side inclined posts 6 and 9 are fixed pins. Reference numeral 13 is a pinch roller for transmitting the rotation of the capstan 14 to the tape 4 when the tape is running, and is pivotally supported by a shaft 16 erected on a pinch arm 15. Furthermore, the pinch arm 15
Is rotatably supported on a shaft 17 that is set up on the pinch skates 32. Vertical posts 18 are also erected on the pinch skates 32. 19 is a tension post, 2
Reference numeral 0 denotes a vertical post, which is a rotary roller with a flange, and is moved by an arm (not shown).

Besides, on a chassis (not shown), vertical posts 21, 22, a full width erasing head 23, a voice / CTL erasing head 24, a voice / CTL recording / reproducing head 25, a voice monitor head 26, a vertical post 27, a capstan. 14, the take-up side tension post 28 is erected, and a tape path is formed by these posts. Numeral 29 is an entrance side catcher, numeral 30 is an exit side catcher, and numeral 31 is a pinch skating catcher, and the entrance side skates 8, the exit side skates 12, and the pinch skates 32 come into contact with each other and are positioned at the end of loading.

Next, the structure of the impedance roller 11 will be described.

FIG. 3 is a left side view of the outlet side skate 12, and FIG. 4 is a sectional view of the impedance roller 11.

The impedance roller 11 is supported via a bearing 34 on a shaft 33 that is pressed into the skate 12 at a predetermined angle with respect to the reference plane. Axis 33
The compression spring 35 arranged between the seat 33a and the bearing 34 urges the compression spring 35 upward, and the height is determined by being restricted by the E ring 36, and the bearing 34 is also preloaded. Further, the impedance roller 11 is
The end portion 11a that does not come into contact with the tape has a larger diameter than the upper portion 11b, and the material is made of a material having a large specific gravity such as Bs to increase the weight.

Next, the movement of the post during loading will be described.

In a state where the cassette is loaded, that is, a loading standby (unloading) state (see FIG. 1), the vertical posts 7, 10, 18, 19, 20 inclined posts 6 and 9, the pinch roller 13 and the impedance roller 11 are arranged. , Located in the cassette opening 1a. When the cassette loading is detected, a loading motor (not shown) is rotated, and the tension post 19, the vertical post 20,
The skates 8, 12, 32 start moving in the directions of the arrows, and the tape 4 in the cassette 1 is pulled out.

The tape 4 that has been pulled out is wound around the drum 5 as the loading progresses, and when it is wound at a predetermined angle, the skates 8, 12, 32 are positioned by the catchers 29, 30, 31, respectively. Loading is complete.

During the loading, the tension post 19 contacts the tape 4 to pull it out.
The vertical posts 7, 10, 18, 20 and the inclined posts 6, 9 are provided, and the impedance roller 11 has a loading path that contacts the tape 4 immediately before the completion of loading. Further, when the tape path is formed, the impedance roller 11 is arranged at an angle that abuts perpendicularly to the tape running direction.

As described above, in this embodiment, the impedance roller 11 is erected on the outlet side skate 12, so that the impedance roller 11 is moved from the cassette 1 side to the drum 5 by operating the outlet side skate 12. Abut the tape 4 toward the side. Therefore, drum 5
It can be placed very close to and can be placed in a large space.

In this embodiment, the impedance roller 11 is arranged between the drum 5 and the outlet side inclined post 9. However, the impedance roller 11 is erected on the inlet side skate 8 so as to stand upright on the drum 5 and the inlet side inclined post 6. It may be arranged between and, or both.

Further, although the impedance roller 11 is erected on the outlet side skate 12 by reducing the number of parts, the outlet roller skate 12 is erected on other members.
It may be linked with the operation of.

Furthermore, in the present embodiment, the impedance roller 11 is interlocked with the movement of the outlet side skate 12, but the impedance roller 11 is provided near the drum 5 in a state where the impedance roller 11 is tilted, and the outlet side skate 12 is installed. The impedance roller 11 may be erected in conjunction with being positioned at a predetermined position to perform a desired operation.

Although the present embodiment has been described by using the so-called M loading method, it goes without saying that the impedance roller can be arranged by other loading methods as described above.

[0028]

As described above, according to the present invention, the impedance roller is brought into contact with the tape from the inside of the tape path when the tape loading is completed. The mass of the impedance roller can be increased without increasing the size.

Further, since the impedance roller is positioned between the rotary drum and at least one of the posts immediately before and after the rotary drum in the tape path, the impedance roller having a sufficiently large mass is rotated. Can be located close enough to the drum.

Further, since the impedance roller is moved so as to be positioned at a predetermined place in conjunction with the loading operation, the tape loading operation cannot be prevented.

Furthermore, since the impedance roller is erected on the post on which the inclined post is erected, the object can be achieved without particularly increasing the number of parts.

[Brief description of the drawings]

FIG. 1 is a view showing a post arrangement of a VTR in an embodiment of the present invention, showing an unloading state.

FIG. 2 is a diagram showing a post arrangement of a VTR in one embodiment of the present invention, showing a loading state.

FIG. 3 is a side view of the skates on which impedance rollers are erected.

FIG. 4 is a sectional view showing a structure of an impedance roller.

FIG. 5 is a diagram showing a tape path of a conventional VTR.

[Explanation of symbols]

 4 Tape 5 Drum 6 Inlet-side inclined post 8 Inlet-side skate 9 Outlet-side inclined post 11 Impedance roller 12 Outlet-side inclined post

Claims (4)

(57) [Claims] 1. A recording or reproducing apparatus comprising: a rotary drum having a head mounted thereon; and an impedance roller for suppressing vibration of a tape wound around the rotary drum, wherein the impedance roller is a tape loading onto the rotary drum. The recording or reproducing apparatus, wherein the tape is brought into contact with the tape from the inside of the tape path when the recording is completed. 2. The impedance roller is located between the rotary drum and at least one of the posts immediately before and after the rotary drum in the tape path when the tape loading is completed. The recording or reproducing apparatus according to Item 1. 3. The recording or reproducing apparatus according to claim 1, wherein the impedance roller moves during the loading of the tape in association with the loading operation. 4. The impedance roller is erected on the skates together with an inclined post for winding the tape around a rotary drum, and moves with the skates when the tape is loaded, and is arranged at a predetermined position. The recording or reproducing apparatus according to claim 3.