JP3074870B2 - Magnetic recording / reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary head type magnetic recording / reproducing apparatus having a linear skate type loading mechanism suitable for use in M recording and, more particularly, to preventing tape damage due to lead of a rotary head drum during loading. .

[0002]

2. Description of the Related Art FIGS. 5 and 6 are plan views of an unloading state and a loading state of a rotary head type magnetic recording / reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. Hei 2-21852 filed by the present applicant. Is shown. The operation of the apparatus will be described below with reference to both figures.

The rotary head type magnetic recording / reproducing apparatus comprises a first chassis 1 provided with a tape running section and a cassette loading section, a second chassis 2 on which a rotary head drum is mounted, and a cassette 3, which are provided. A first chassis 1 is provided on a second chassis 2, and a cassette 3 is mounted on the first chassis 1 and assembled. That is, in the unloading state shown in FIG. 5, the first chassis 1 is fixed to the rack 4, and this rack 4 is engaged with the output shaft of the loading motor 26 of the second chassis 2. At the time of this unloading, cassette 3
Tapes 33, 33 wound around the reels 32, 32
Is linearly wound around the tape running portion 35 between the guide rollers 34, 34, and the loading motor 26
Is rotated, the second chassis 2 is moved to the first chassis 1 side via the rack 4, whereby the rotating head drum 21 and the capstan 2 provided on the second chassis 2 are moved.
2 and the tension regulator 23 are the first chassis 1
Are engaged in the notches 16, 17 and 18 of FIG.

At the time of this loading, the tape 33 is guided by the guide pins 13 and 13 provided on the first chassis 1, the inlet-side inclined guide 14a and the outlet-side inclined guide 14b, and is inserted between the guide pins 14a and 14b. The tape is wound around the peripheral surface of the rotating head drum 21, is held between the capstan 22 and the pinch roller 15, and the tape tension is adjusted by the tension regulator 23.

[0005] In this manner, the tape 33 is wound around the rotary head drum 21 and transferred by the rotation of the capstan 22, and recording and reproduction are performed by a head (not shown) provided on the rotary head drum 21.

Here, it is necessary to wind the tape 33 around the rotary head drum 21 at a predetermined inclination angle, and such an inclination is omitted in the drawing, but the entrance side inclination guide 14a and the exit side inclination guide 14b by tilting the rotary drum 2 at a predetermined angle.
1 has a predetermined inclination (in the case of the M-loading method of this example, it is inclined by 180 ° as shown by the coordinate system in FIG. 7). Reference numeral 21b denotes a magnetic head of the rotary head drum 21.

[0007]

However, the above-described magnetic recording / reproducing apparatus includes first and second chassis 1 and 2.
The tape is wound around the rotary head drum 21 by so-called linear skating, in which the lead 21a of the rotary head drum 21 and the lower edge of the tape 33 have a positional relationship as shown in FIG. 33a will overlap like a diagonal line. Therefore, when the loading operation is performed in this positional relationship, the lower edge 33a of the tape is damaged by the lead 21a of the rotary head drum 21, and as a result, there is a problem that the image is disturbed during the reproduction of the tape.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and eliminates the overlap between the lead of the rotary drum and the tape during tape loading.
It is an object of the present invention to obtain a magnetic recording / reproducing apparatus in which tape damage is prevented.

[0009]

In order to achieve the above-mentioned object, a magnetic recording / reproducing apparatus according to the present invention is arranged such that a magnetic tape accommodated in a tape cassette is guided by a tape guide of a tape running unit and is attached to a rotary head drum. A magnetic recording / reproducing apparatus having a loading mechanism configured to be wound, wherein a posture of a rotary head drum is moved to a tape supply side.
From the state where the tape is inclined at 0 °, the tape is further inclined by a predetermined angle toward the cassette to be loaded into the tape cassette loading section, and the rotary head drum is positioned slightly below the lower edge of the tape whose lead travels through the tape traveling section in that posture. It is set in a state of being lowered by a predetermined amount as described above.

[0010]

The magnetic recording / reproducing apparatus configured as described above lowers the rotary head drum by a predetermined amount with respect to the tape while keeping the tilted attitude of the rotary head drum in order to avoid the overlap between the lead of the rotary head drum and the tape. Overlap between the lead and the tape can be avoided. However, in this state, the adhesiveness of the tape to the drum surface of the rotary head drum is impaired, so that the rotary head drum is further tilted from the above-mentioned inclined posture to the cassette side by a predetermined angle, and the rotary head drum at the inlet side and the outlet side is rotated. By adjusting the inclination of the inclination guide, the adhesion between the drum surface and the tape can be improved.

In addition, since the rotary head drum has the above-described inclined posture, the tape wrap angle of the inlet-side inclined guide of the rotary head drum is increased to increase the tape tension, and the tape wrap angle of the outlet-side inclined guide is increased. To reduce the tape tension,
As a result, the tape tension of the entire tape traveling system is reduced, and damage to the tape can be reduced.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of the magnetic recording / reproducing apparatus during tape loading.
As described in the above, the first chassis 1 and the second chassis 2
Are the same as those of a so-called linear skate type magnetic recording / reproducing apparatus which relatively moves and winds a tape around the rotating drum 21. Therefore, all the reference numerals are the same. I do.

The rotary head drum 2 during tape loading of a linear skate type magnetic recording / reproducing apparatus is now described.
As a method of solving the overlap between the lead 1 and the tape 33, there is a method of adjusting the height position of the rotary head drum with respect to the tape. For example, in the case of an M-type loading magnetic recording / reproducing apparatus as shown in FIG. 1, the rotary head drum 21 is inclined by 180 ° in the coordinate system shown in FIG. The tape 3 in a horizontal state with respect to the rotary head drum 21 inclined at 180 °
3, the rotating head drum 2 is wound.
1, the tape 33 is wound at a predetermined inclination angle.

However, the rotating head drum 21 and the tape 3
Since the rotating head drum 21 is vertically lowered as it is by a predetermined amount, the lead of the rotating head drum 21 separates from the tape 33 and the lead 2
Although the overlap between 1a and the tape 33 is eliminated,
On the other hand, adhesion between the rotary head drum 21 and the upper edge of the tape 33 is impaired, and a gap is formed between the drum surface and the tape.

Therefore, in order to eliminate the above-mentioned problem, the rotating head drum 21 is moved to the position indicated by an imaginary line in FIG.
As shown by the solid line in FIG. 2, the air gap between the drum surface and the tape can be eliminated by inclining the tape 3 at a predetermined angle θ toward the cassette 3 as shown by a solid line in FIG. As shown in FIG.
The lower edge 33a is positioned without overlapping the lead 21a of the rotary head drum 21 and can be wound in close contact with the drum surface. As an example, the rotating head drum 21
Is about 10 ° (190 ° in the coordinate system of FIG. 7), although it varies depending on the drum diameter of the rotary head drum 21.
° direction) before and after.

On the other hand, since the rotary head drum 21 has the inclined posture as described above, the rotary head drum 21
The inclination angles of the entrance-side inclined guide 14a and the exit-side inclined guide 14b are not symmetric. In other words, the tape wrap angle is increased and the tape tension is increased in the inlet-side inclined guide 14a, and the tape wrap angle is reduced in the outlet-side inclined guide 14b to reduce the tape tension.

FIG. 4 shows the tilt guides 14a,
14B is a graph comparing the maximum tape tension at the time of loading between the present invention and the conventional example in the tape running system together with 14b. As can be seen from this graph, in the case of the present invention shown by a solid line, as described above, the entrance side inclined guide 14
a, the tape tension is large, and the exit side inclined guide 1
4b, when the maximum tension in the rotary head drum 21 is made the same by reducing the tape tension, the maximum tension value according to the present invention can be reduced as a whole as compared with the maximum tension value of the conventional example indicated by the broken line. Thereby, tape damage in the tape running system is reduced, and stable tape running can be performed.

Further, as described above, the rotary head drum 2
When the rotary head drum 21 is linearly skated into the cassette mouse at the time of loading by inclining the rotary head drum 21 toward the cassette side and pulling it down further, the gap between the rotary head drum and the upper surface of the cassette mouse is widened, so that interference between both can be avoided. Thus, the tape loading operation can be performed reliably and smoothly.

The present invention is not limited to the embodiment described above and shown in the drawings, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment, the first chassis 1 and the second chassis 2 are relatively moved so that the tape can be loaded onto the rotary head drum 21. However, the rotary head drum performs linear skating. The configuration of the embodiment is not limited as long as the tape can be loaded.

[0020]

As described above, the magnetic recording / reproducing apparatus according to the present invention has a linear skate type in which the chassis provided with the rotary head drum moves relative to the cassette and the tape can be wound around the rotary head drum. In the magnetic recording / reproducing apparatus, the rotary head drum is tilted toward the cassette from the 180-degree tilted state, and further lowered by a predetermined amount from this tilted posture, so that the lower edge of the tape overlaps the lead of the rotary head drum during tape loading. The tape can be wound in close contact with the rotary head drum without any trouble, whereby a stable reproduced image can be obtained without the tape being damaged by the lead of the rotary head drum. In addition, by adopting the above-described inclined posture of the rotary head drum, the maximum tape tension of the entire tape traveling system can be made smaller than that of the conventional tape traveling system, and as a result, tape damage is reduced and stable. Tape running becomes possible. Further, by lowering the rotating head drum downward by a predetermined amount in the above-described inclined posture, interference between the rotating drum and the upper surface of the cassette mouse during loading can be avoided, and a smooth loading operation can be performed.

[Brief description of the drawings]

FIG. 1 is a magnetic recording / reproducing apparatus according to an embodiment of the present invention;
It is a top view at the time of tape loading.

FIG. 2 is a schematic view of an inclined posture of a rotary head drum according to the present invention.

FIG. 3 is a diagram illustrating a positional relationship between a rotary head drum and a tape according to the present invention.

FIG. 4 is a comparison diagram of the maximum tape tension of the tape running system between the present invention and the conventional example.

FIG. 5 is a plan view of a conventional magnetic recording / reproducing apparatus before loading.

FIG. 6 is a plan view of a conventional magnetic recording / reproducing apparatus during loading.

FIG. 7 is a diagram of a conventional rotating drum and its coordinate system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st chassis 2 2nd chassis 3 Cassette 14a, 14b Inclined guide 21 Rotating head drum 21a Lead 33 Tape 33a Tape lower edge

Claims (1)

(57) [Claims] 1. A magnetic tape stored in a tape cassette.
Is guided by the tape guide of the tape running section.
A magnetic recording / reproducing apparatus having a loading mechanism that can be wound around a rotating drum, wherein the attitude of the rotary head drum is shifted by 180 ° toward a tape supply side.
From the tilted state, the tape is further tilted by a predetermined angle toward the cassette to be loaded into the tape cassette loading section, and the rotary head drum is positioned slightly below the lower edge of the tape whose lead travels through the tape transport section while keeping the attitude. The magnetic recording / reproducing apparatus is set in such a state that it is lowered by a predetermined amount.