JPH05128669A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To resolve overlapping a tape with a lead of a rotary head drum at the time of loading the tape and to prevent the tape from being damaged in a linear skate system magnetic recording and reproducing device. CONSTITUTION:The rotary head drum 21 is inclined by 10 deg. to the side of a cassette to be loaded into a tape cassette loading part from its inclined posture of 180 deg. to the side of supplying the tape, and the rotary head drum 21 under this inclined posture is pulled down by a prescribed amt. in order to position its lead slightly below the lower edge of the tape.

Description

Detailed Description of the Invention

[0001]

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 which is suitable for use in M recording, and more specifically, to prevent tape damage due to leads of a rotary head drum during loading. ..

[0002]

2. Description of the Related Art FIGS. 5 and 6 are plan views of a rotary head type magnetic recording / reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. 2-218052 previously filed by the present applicant in an unloading state and a loading state, respectively. Indicates. The configuration of the apparatus and the operation thereof will be described below with reference to both drawings.

The rotary head type magnetic recording / reproducing apparatus comprises a first chassis 1 having a tape running section and a cassette loading section, a second chassis 2 having a rotary head drum mounted therein, and a cassette 3. The first chassis 1 is provided on the second chassis 2, and the cassette 3 is mounted and assembled on the first chassis 1. That is, in the unloading state of FIG. 5, the first chassis 1 is fixed to the rack 4, and the rack 4 is meshed with the output shaft of the loading motor 26 of the second chassis 2. Cassette 3 during this unloading
33, 33 wound around the reels 32, 32
Is linearly wound around the tape running portion 35 between the guide rollers 34, 34, and from this state, the loading motor 26
When the second chassis 2 is rotated, the second chassis 2 is moved to the first chassis 1 side via the rack 4, whereby the rotary 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
Each of the notches 16, 17 and 18 is engaged to obtain the loading state 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 both guide pins 14a and 14b. Further, the tape is wound around the peripheral surface of the rotary head drum 21, sandwiched between the capstan 22 and the pinch roller 15, and the tape tension is adjusted by the tension regulator 23.

In this way, the tape 33 is wound around the rotary head drum 21, transported by the rotation of the capstan 22, and recorded and reproduced by a head (not shown) provided on the rotary head drum 21.

Here, when winding the tape 33 around the rotary head drum 21, it is necessary to wind the tape 33 at a predetermined inclination angle, and although such inclination is omitted in the figure, the inlet side inclination guide 14a and the outlet side inclination guide are provided. 14b by tilting the rotary drum 2 at a predetermined angle.
This is made possible by giving 1 to a predetermined inclination (in the case of the M loading method of this example, it is inclined by 180 ° as shown in the coordinate system of FIG. 7). Reference numeral 21b represents a magnetic head of the rotary head drum 21.

[0007]

However, the above-mentioned magnetic recording / reproducing apparatus is provided with the first and second chassis 1 and 2.
Since the tape is wound around the rotary head drum 21 by the so-called linear skating in which the head moves relatively, the leads 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, there is a problem that the lower edge 33a of the tape is damaged by the lead 21a of the rotary head drum 21 and, as a result, the image is disturbed when the tape is reproduced.

The present invention has been made to solve the above problems, and eliminates the overlap between the lead of the rotary drum and the tape at the time of tape loading,
It is an object of the present invention to obtain a magnetic recording / reproducing device which is capable of preventing tape damage.

[0009]

To achieve the above object, in a magnetic recording / reproducing apparatus according to the present invention, a rotary head drum and a tape cassette loading section having a tape running section are relatively moved. A magnetic recording / reproducing apparatus having a linear skate type loading mechanism in which a magnetic tape housed in a tape cassette is guided by a tape guide of a tape running portion and wound around a rotary drum by a rotary head drum. From the state in which the tape is tilted 180 ° toward the tape supply side and further tilted by a predetermined angle toward the cassette side loaded in the tape cassette loading section, and the lead of the rotary head drum of the tape running in the tape running section is held in that attitude. It is set in a state of being lowered by a predetermined amount so as to be positioned slightly below the lower edge.

[0010]

In the magnetic recording / reproducing apparatus configured as described above, the rotary head drum is lowered by a predetermined amount with respect to the tape in its inclined posture in order to avoid overlapping of the lead of the rotary head drum and the tape. It is possible to avoid overlapping of leads and tape. However, in this state, the adhesiveness of the tape to the drum surface of the rotary head drum is impaired. The inclination of the inclination guide can be adjusted to improve the adhesion between the drum surface and the tape.

Further, since the rotary head drum is inclined as described above, the tape winding angle of the inlet side inclined guide of the rotary head drum is increased to increase the tape tension, and the tape winding angle of the outlet side inclined guide is increased. To reduce the tape tension,
This reduces the tape tension of the entire tape running system and reduces damage to the tape.

[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 at the time of tape loading. This magnetic recording / reproducing apparatus is shown in FIGS.
The first chassis 1 and the second chassis 2 as described in
Is the same as a so-called linear skate type magnetic recording / reproducing apparatus that relatively moves and winds a tape around the rotating drum 21, and therefore, all reference numerals are the same, and therefore, the same components are denoted by the same reference numerals and description thereof is omitted. To do.

The rotary head drum 2 at the time of tape loading of the linear skate type magnetic recording / reproducing apparatus.
As a method of solving the overlap between the lead of No. 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. 7 as described above. The tape 3 in a horizontal state with respect to the rotary head drum 21 inclined by 180 °
By winding 3 around the rotary head drum 2
The tape 33 is wrapped around the tape 1 at a predetermined inclination angle.

However, the rotary head drum 21 and the tape 3
Because of the above-described positional relationship with 3, when the rotary head drum 21 is vertically lowered by a predetermined amount as it is, the lead of the rotary head drum 21 separates from the tape 33 and the lead 2
Although the overlap between 1a and tape 33 is eliminated,
On the other hand, the close contact between the rotary head drum 21 and the tape 33 on the upper edge side is impaired, and a space is formed between the drum surface and the tape.

Therefore, in order to eliminate the above-mentioned inconvenience, the rotary head drum 21 is moved as shown by a phantom line in FIG.
As shown by the solid line in FIG. 2 while tilted at 0 °, the gap between the drum surface and the tape can be eliminated by tilting the cassette 3 side, more specifically, the supply reel 32 side by a predetermined angle θ. As shown in FIG.
The lower edge 33a thereof is positioned without overlapping the lead 21a of the rotary head drum 21, and can be wound closely on the drum surface. As an example, the rotary head drum 21
The inclination angle θ of 10 ° depends on the drum diameter of the rotary head drum 21, but is about 10 ° (190 in the coordinate system of FIG. 7).
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 is
The inclination angles of the inlet side inclination guide 14a and the outlet side inclination guide 14b are not symmetrical. That is, the tape winding angle is increased and the tape tension is increased in the entrance side inclined guide 14a, and the tape winding angle is decreased and the tape tension is decreased in the exit side inclined guide 14b.

Therefore, the tilt guide 14a described above with reference to FIG.
14B is a graph showing a comparison between the present invention and a conventional example of the maximum tape tension at the time of loading in the tape running system together with 14b. As can be seen from this graph, in the case of the present invention shown by the solid line, as described above, the inlet side inclined guide 14
At a, the tape tension is large, and the exit side inclined guide 1
In 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 made smaller than the maximum tension value of the conventional example shown by the broken line. As a result, 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 1 toward the cassette side and further pulling it downward, the gap between the rotary head drum and the top surface of the cassette mouse is widened, and interference between the two can be avoided. As a result, the tape loading operation can be performed reliably and smoothly.

The present invention is not limited to the embodiments 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 moved relative to each other so that the tape can be loaded onto the rotary head drum 21, but 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, in the magnetic recording / reproducing apparatus according to the present invention, the chassis having the rotary head drum moves relative to the cassette so that the tape can be wound around the rotary head drum. In the magnetic recording / reproducing apparatus, the rotary head drum is tilted from the inclined state of 180 ° to the cassette side and further lowered from this inclined posture by a predetermined amount, so that the lower edge of the tape overlaps the lead of the rotary head drum at the time of tape loading. The tape can be wound in close contact with the rotary head drum without any trouble, and a stable reproduced image can be obtained without damaging the tape by the lead of the rotary head drum. Also, by adopting the above-described inclined posture of the rotary head drum, the maximum tape tension of the entire tape running system can be made smaller than that of the conventional tape running system, and as a result, tape damage is reduced and stable. The tape can be run. Further, by pulling the rotary head drum downward by a predetermined amount in the above-described inclined posture, interference between the rotary drum and the upper surface of the cassette mouse at the time of loading can be avoided and a smooth loading operation can be performed.

[Brief description of drawings]

FIG. 1 shows 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 of 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 the conventional magnetic recording / reproducing apparatus at the time of loading.

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

[Explanation of symbols]

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

Claims (1)

[Claims] 1. A magnetic tape accommodated in a tape cassette is guided by a tape guide of the tape running portion by relatively moving a rotary head drum and a tape cassette loading portion having a tape running portion. A magnetic recording / reproducing apparatus having a linear skate type loading mechanism adapted to be wound around the rotary drum, wherein the posture of the rotary head drum is 180 ° toward the tape supply side.
From the tilted state, the tape is further tilted by a predetermined angle to the side of the cassette loaded in the tape cassette loading section, and the lead is positioned slightly below the lower edge of the tape whose lead runs in the tape running section while maintaining that posture. A magnetic recording / reproducing apparatus characterized in that the magnetic recording / reproducing apparatus is set in a state of being lowered by a predetermined amount.