JPS58200404A - Recording or reproducing device - Google Patents

Abstract

PURPOSE:To enable the reciprocal recording/reproducing and to reduce the damage of a tape due to a rotary head, by winding a tape around a guide drum so that the rotary head performs a scan from the center part in the width direction toward a terminal part of the tape. CONSTITUTION:A guide drum 1 consists of upper and lower fixed drums 1A and 1B and a rotary drum 1C put between drums 1A and 1B. The lower drum 1B has a lead part 3 having a winding tilt angle of a tape as a difference of level. Therefore the tape 2 is shifted to move up gradually toward an arrow 4. As a result, rotary heads HA and HB perform scans from the center part toward a terminal part of the tape 2. Therefore regions I and II are scanned toward arrows 5A and 5B by shifting the tape 2 with upper and lower edges of the tape inverted to each other in the tape width direction. Thus, the reciprocal recording and reproducing are enabled. Furthermore the damage of the tape is reduced since the scan is carried out by the rotary head from the center part of the tape.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention sequentially forms diagonal magnetic tracks on a magnetic tape using a rotating head to record video signals and audio PC signals.
Regarding devices that record or reproduce information signals such as M signals, it is possible to record and reproduce back and forth tapes, and to stabilize the head touch at the point where the rotating head starts contacting the tape. Deep damage 5K
This is what I did.

Hereinafter, an example of this invention will be explained with reference to the drawings.

FIG. 1 shows an example of the number of rotating heads that are the main parts of the device of this invention. In this example, the heads are 1110 &
In Figure 0, (1) is the guide drum; 21 is a tape.

The guide drum (,1) is, for example, an upper and lower fixed drum (1 mm
IB) and the upper and lower fixed drums (IA) (IB), and two rotating heads HA and HB are attached to the intermediate drum (Ic), which is rotated by, for example, 801 (J). In this example, the fixed lower drum (IB) K has a lead part (3) that guides the angle of inclination for winding the tape, and is provided with a step on the drum. In this case, if tape (2) is transported in the direction of arrow (4) in the figure, tape (2)
is guided by the reed (3) so as to gradually rise relative to the guide drum (11) (hereinafter referred to as the rising reed).

In this case, the upper and lower ends of the tape in the width direction are turned over so that reciprocating recording or reciprocating lining can be performed on the tape (2). Therefore, as shown in Fig. 8, the tape (2) is divided into two in the width direction, area I and area
It can be divided into Then, when the tape (2) is transferred in one direction, the rotary heads HA and HB are set to scan so as to form a diagonal track in one area, and in a reciprocating manner, for example, as shown in No. **, area I, Head HA with II
, HB are scanned.

In this example, when the tape (2) is transported in one direction, the lower half of the tape (2) in the width direction is scanned. Therefore, the tape (2) is one of the guide drums (1).
Even though it can be wrapped around an 80° angle range, the rotating head HA
, HB is not designed to scan from one end of the tape (2) in the width direction to the other end, but as shown in Figure 1, the rotating head tom and HB are scanned approximately at the center of the tape (2) in the width direction. It is wound so as to scan between the position and one end of the tenip (2) in the width direction. Furthermore, in this invention, as shown by the arrow (5) in FIG.
B is set at 5 so that it is located approximately at the center of the tape (2) in the width direction.

Furthermore, #I- To explain, if we consider the case where signals are recorded on tape (2) by heads) iA and HB,
Tape (2) is placed in area 1i11K below drum (1).
When it is wrapped around the tape (2) as shown in Figure 2. As shown, k in the width direction of tape (2) is the area from the center position.
By scanning toward the edge hook, diagonal magnetic tracks T1°Tm, Tm, . . . are formed, and signals are recorded.

Next, when the lower end side and the lower end side in the width direction of the tape (2) are turned over and wound around the guide drum (1) K so that the area I is on the lower side, the tape (2) is In the upper region 1, the rotating head HB scans from the center position of the tape (2) in the width direction toward the edge of this region 2, as shown by the arrow (IB) of the tape 2-.
From the diagonal magnetic tracks T, T, , respectively,
TC, . . . are formed and the signal is recorded.

In this way, reciprocating recording is performed, and reciprocating reproduction is also performed in the same manner.

In the above example, the lead (3) that guides the tape (2) is a rising lead, and heads HA and HB are used to guide the tape (2).
) in the direction of transport,
The direction in which the tape (2) is transported is opposite to the arrow (4) in FIG.

The present invention is applicable even when the HB moves against the direction in which the tape (2) is transported. l! In this case, the head tom and HB may scan from any part of the tape (2) in the width direction toward one end of the tape (3) in the width direction.

As described above, according to the present invention, the head scans from the center in the width direction of the tape to one end in the width direction, so that the contact of the head with the tape is good, and the head is moved to the tape. It also causes less damage.

That is, as shown in FIG. 3, in conventional one-way recording or playback, the head scans the ISO in an angular range from one end of the tape in the width direction to the other end.
If the rotating head crosses from the bottom end of the 5KWJ to the top end as indicated by the bold line arrow in Figure 3, the bottom end of the tape [
The head tends to catch the tape, seriously damaging the tape edge and head tip. On the other hand, according to the present invention, such a problem does not occur because the scanning of the head starts from the center in the width direction of the tape.

Furthermore, at the lower end of the tape in Figure 3, the winding of the tape (2) around the drum (1) follows the rotation of the drum in the same manner as at the lower end in the width direction of the section in Figure 4. Third
As shown by the arrow (6) in the figure, air flows into both sides of the magnetic image and base side of the tape, causing f-1 to vibrate. For this reason, when the head scans from end to end in the width direction of the tape as shown in Figure 3, the head tatsuna at this air inlet part causes great damage to the tape, and the head chip also causes great damage to the tape. On the other hand, there is also a risk that the head chip may become severely damaged. On the other hand, in this invention, the tape is wound around the drum so that the head tom and HB start contacting the tape from approximately the center in the width direction of the tape, so as is clear from FIG. At the part where HB starts to come into contact with the tape (2) K, all the air enters the air film layer Kl between the tape (2) and the drum (1), so that the tape (2) vibrates in this part. There was no problem, and it became a stable head touch.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a rotating bed device according to an example of the present invention, FIG. 2 is a diagram showing a recording track pattern thereof, and FIG.
4 and 4 are diagrams for explaining the present invention in detail. (1) is a guide drum, (2) is a tape, and H and HB are rotary heads. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] The tape is divided into two areas in the width direction, and the tape is fed in one direction in each area, and a rotating head scans the tape diagonally to record or reproduce information signals, thereby recording or reciprocating the tape. A recording and reproducing apparatus capable of 5K reproduction, in which the rotary head always starts scanning from the center in the width direction of the tape.