JPH0520751A - Magnetic recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the magnetic tape from being damaged by excessive pulling of the tape guide during loading / unloading. Prevents the magnetic tape from buckling due to height restrictions during driving. This prevents the magnetic tape from being damaged by being overloaded by the drive source during recording and playback. In a magnetic recording / reproducing apparatus, a groove 50a made of an elastic material having a large friction coefficient with a magnetic tape, wider than the magnetic tape and having the same width as the magnetic tape and a depth shallower than the thickness of the magnetic tape is formed on one side. Endless dummy tape 50 and dummy tape winding member 60
So that the magnetic tape 1 and the dummy tape 50 overlap and run on the same system road in the loading state so that only the dummy tape 50 is driven by the drive source. I chose

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing device such as a VTR or DAT.

[0002]

2. Description of the Related Art FIG. 8 is a plan view showing a state in which a conventional magnetic recording / reproducing apparatus (hereinafter referred to as "VTR") is loaded with a magnetic tape cassette, and FIG.
FIG. 7 is a plan view showing a traveling path of the magnetic tape at the time of loading. In the figure, 1 is a magnetic tape, 6 is a supply side guide roller, 7 is a supply side slant pin, 8 is a rotary cylinder to which a magnetic head is attached, 9 is a take-up side slant pin, and 10 is a take-up side. Guide rollers, 13 pinch rollers, 14 capstans, 21 tape guides in a magnetic tape cassette, 24
Is a supply reel and 25 is a take-up reel.

Next, the operation will be described. At the time of loading, the magnetic tape 1 includes the guide rollers 6 and 10,
The slant pins 7 and 9 pull out the magnetic tape cassette 20 under tension and wind the magnetic tape cassette 20 around the rotary cylinder 8 to form a predetermined traveling path.

When recording or reproducing a signal, the magnetic tape 1 is driven at a constant speed by the pinch roller 13 and the capstan 14, and when rewinding or fast-forwarding, the magnetic tape 1 is driven by the supply reel 24 or the take-up reel 25, respectively. To be done. At this time, the heights of the guide rollers 6 and 10 and the lead portions of the rotary cylinder 8 are restricted so that the magnetic tape 1 travels in a predetermined tape travel path with high accuracy.

At the time of unloading, the magnetic tape 1 has the guide rollers 6, 10 and the slant pins 7,
The magnetic tape cassette 20 is wound by the supply reel 24 or the take-up reel 25 in a state where tension is applied as the sheet 9 moves.

[0006]

When the magnetic tape 1 is loaded or unloaded in the conventional VTR, the magnetic tape cassette 20 is loaded from the inside of the magnetic tape cassette 20 while receiving a large pulling load by the guide rollers 6, 10 and the slant pins 7, 9. In particular, in the case of an ultra-thin magnetic tape having a thickness of 10 μm or less, the edge portion of the magnetic tape 1 may be buckled or partially extended due to being pulled out or wound up. there were.

Also, the ultra-thin magnetic tape 1 is
When the magnetic tape 1 travels on the TR, buckling occurs in the flange portions of the guide rollers 6 and 10 for regulating the height of the magnetic tape 1 on the traveling path and the lead portion of the rotary cylinder 8. The edge part was sometimes damaged.

Further, at the time of recording / reproducing, the drive source of the magnetic tape, that is, the pinch roller 13 and the capstan 14
Since the magnetic tape 1 is pinched by a large pressure and a driving force is applied, the magnetic tape 1 may be partially expanded or damaged.

The present invention has been made to solve the above problems. Even when an ultra-thin magnetic tape is used, the edge portion may buckle or partially stretch. The purpose is to obtain a VTR without

[0010]

The invention of claim 1 is made of an elastic material having a large coefficient of friction with a magnetic tape, has a width wider than that of the magnetic tape, and has the same width as the magnetic tape on the outer surface and the thickness of the magnetic tape. Fits the endless dummy tape in which a groove with a shallow depth is formed and the winding mechanism that winds and stores the extra portion of the dummy tape during unloading into the front recess of the magnetic tape cassette to be loaded. It is characterized in that it is provided at a position.

The invention of claim 2 is characterized in that an endless dummy tape and a winding mechanism for the dummy tape are provided in a magnetic tape cassette.

The invention of claim 3 is characterized in that it comprises means for stopping the winding operation by the supply side or take-up side reel immediately before the end of the unloading operation.

According to a fourth aspect of the present invention, the magnetic tape is formed in a cross-sectional shape that is curled in the width direction by its elastic force.

[0014]

According to the first and second aspects of the present invention, at the time of loading, the magnetic tape is pulled out from the magnetic tape cassette by the loading mechanism so that the magnetic tape fits in the groove of the dummy tape and is overlapped while the tape is running. At the time of formation and unloading, the endless dummy tape bears most of the stress applied to the magnetic tape because the dummy tape and the magnetic tape are stored in the magnetic tape cassette while keeping the state of being overlapped.
No damage to the magnetic tape.

According to the third aspect of the invention, the magnetic tape is stored in the magnetic tape cassette in a slightly slackened state, so that a large tensile stress is not applied to the magnetic tape during storage, and at the time of loading. Since the tensile stress applied to the magnetic tape can be relaxed in the initial stage of, the damage to the magnetic tape can be reduced.

According to the invention of claim 4, since the magnetic tape itself is curled in the width direction, even if the magnetic tape is stored in the magnetic tape cassette in a slack state, the position of the magnetic tape between both reels hangs down. And the loading operation is not hindered.

[0017]

【Example】

Example 1. 1 is a plan view showing a state during unloading of an embodiment of the invention of claim 1, FIG. 2 is a plan view showing a state during loading, and FIG. 3 is a take-up side guide roller during loading. In a partially enlarged perspective view of a part,
Reference numerals 1 to 25 in the figure indicate the same parts as those of the conventional example shown in FIG. In the figure, reference numeral 50 is an endless dummy tape, which is an endless tape wider than the magnetic tape 1 and made of an elastic material having a large friction coefficient with the magnetic tape 1. The guide roller 6 on the supply side and the take-up side. It is hung between the guide rollers 10 of
On the front surface thereof, a groove portion 50a having the same width as the magnetic tape 1 and a depth shallower than the thickness of the magnetic tape 1 is formed in the longitudinal direction. Reference numeral 51 denotes a tape guide, which arranges the endless dummy tape 50 in a predetermined traveling path at the time of loading.

Reference numeral 60 denotes a winding mechanism for the endless dummy tape 50. In this embodiment, the endless dummy tape 50 is inserted into a groove 60a provided at the center of a cylindrical member having a tip end portion which is divided into two parts. At the time of loading, the member 60 is rotated to wind up the remaining portion of the endless dummy tape 50. The winding mechanism 60 and the endless dummy tape 50 are arranged so that the front side recess 20 of the magnetic tape cassette 20 can be unloaded.
It is arranged on the VTR so as to be housed in a, and is constructed so as not to interfere with the attachment and detachment of the magnetic tape cassette 20.

At the time of loading of this embodiment, the magnetic tape 1 is guided by the guide rollers 6, 10 and the slant pins 7, 9 into the groove 50a of the endless dummy tape 50.
The endless dummy tape 50 is pulled out in the direction of the arrow in a state where the endless dummy tape 50 is overlapped with the endless dummy tape 50 when the loading mechanism is completed.
0, tape guide 51, guide roller 6, slant pin 7, rotating cylinder 8, slant pin 9, guide roller 1
0, the capstan 14, and the pinch roller 13 to form a traveling path, and a portion from the guide roller 6 to the guide roller 10 which is a common portion with the traveling path of the magnetic tape 1,
The magnetic tape 1 and the endless dummy tape 50 overlap, and the endless dummy tape 50 is the capstan 1.
4 drives the magnetic tape 1 to run through the endless dummy tape 50.

On the other hand, at the time of unloading, the winding mechanism 60 and the reel 24 are respectively moved as the guide rollers 6 and 10 and the slant pins 7 and 9 move with the endless dummy tape 50 placed inside and overlapping the magnetic tape 1. , 25 and is held in the state of FIG.

In this embodiment, the guide rollers 6 and 10 and the slant pins 7 and 9 are used as a loading mechanism for pulling out the magnetic tape 1 and the endless dummy tape 50. Even if it is pulled out by another member, the same effect can be expected.

Further, in this embodiment, as the winding mechanism 60 for the endless dummy tape 50, the groove 60a is formed at the tip.
Although the cylindrical member 60 in which is formed is rotated, the endless dummy tape wound may be housed in the front concave portion 20a of the magnetic tape cassette 20 to be inserted.

Further, in the present embodiment, the tape running path is formed in which the endless dummy tape 50 and the magnetic tape 1 are overlapped around the rotary cylinder 8. However, the overlapped portions may be spread over a plurality of places or at other places. Even if there is, the same effect can be expected.

Further, in the present embodiment, the drive source of the endless dummy tape 50 is the capstan and the pinch roller, but the same effect can be expected even if other drive sources are used.

Example 2. FIG. 4 is a plan view showing a state during unloading of an embodiment of the invention of claim 2, and FIG. 5 is a plan view showing a state during loading. In the figure, 61 is a VTR along the outer circumference of the supply reel 24.
An arcuate slide groove 62 formed on the base of the slant pin 62 is a slant pin that engages with the slide groove and moves back and forth in the arrow direction, and is biased in the arrow D direction by an elastic member (not shown). , 62 form a dummy tape winding mechanism 60.

Next, the operation will be described. At the time of unloading, the slide pin 62 is at the position shown in FIG. 4, and the endless dummy tape 50 is accommodated in the magnetic tape cassette 20 along the tape guide 51.

At the time of loading, the magnetic tape 1 and the endless dummy tape 50 are pulled out from the magnetic tape cassette 20 with the magnetic tape 1 and the endless dummy tape 50 overlapped with each other, and the slant pin 62 is moved along the slide groove 61 to the position shown in FIG. Then, it becomes a loading state.

The operation during traveling is the same as in the above embodiment. The operation during unloading is the reverse of the operation during loading, and the endless dummy tape 50 is stored in the magnetic tape cassette 20.

Example 3. FIG. 6 is a plan view of an embodiment of the invention of claim 3, wherein the magnetic tape 1a shown by the solid line shows the position at the time of unloading with the one-dot chain line.
b shows the positions at the time of loading, and the broken lines show the positions at the time of loading the conventional magnetic tape.

In this embodiment, when the loading state is changed to the unloading state, a mechanism for stopping the winding operation by the supply side reel 24 and the take-up side reel 25 is provided immediately before the end of the unloading operation.

In this embodiment, when the unloading operation is performed from the loading state, the reels 24, 2
A part of the magnetic tape 1 is slackened by 5 without completely winding the magnetic tape 1. That is, during the unloading operation, the magnetic tape 1 is taken up by the reels 24 and 25 as the guide rollers 6 and 10 and the slant pins 7 and 9 move in the directions of the arrows. The winding operation by 25 is stopped, and only the unloading operation of the guide rollers 6, 10 and the slant pins 7, 9 is continued. Therefore, the magnetic tape 1
As shown by the solid line in the figure, the unloading operation is completed in a state of slackening in the longitudinal direction.

For this reason, since a large tensile stress is not applied to the magnetic tape 1, partial elongation does not occur during storage. In addition, since it is possible to reduce the sudden tensile force applied by the slant pin or the guide roller at the start of the loading operation, it is possible to reduce the occurrence of partial elongation.

Example 4. FIG. 7 is a plan view showing a state during unloading of an embodiment of the invention of claim 4. In the embodiment 3, the conventional coating type magnetic tape is used as the magnetic tape 1. In, a vapor deposition type magnetic tape curled with a curvature in the width direction is used. Therefore, even if the magnetic tape 1 sags in the longitudinal direction, it does not hang down in the height direction. Therefore, even if the magnetic tape sags, the loading operation is not hindered.

In this embodiment, the magnetic tape cassette 2 is used.
When 0 is ejected, the magnetic tape cassette 20 may be ejected after at least one of the reels 24 and 25 rotates in the winding direction.

In the above embodiment, the guide rollers 6, 10,
Although the magnetic tape 1 is made to sag by the operation of the slant pin 7.9 and the reels 24 and 25, if at least a part of the magnetic tape is sagging in the longitudinal direction in the unloading state, another means is available. The same effect can be expected.

[0036]

According to the first aspect of the present invention, an endless dummy tape wider than the magnetic tape formed of an elastic material and a winding for storing the endless dummy tape by winding an extra portion at the time of unloading The mechanism and the mechanism are arranged so as to be located in the front concave portion of the magnetic tape cassette mounted on the VTR, and the magnetic tape is fitted into the groove portion of the same width formed on the front side of the endless dummy tape at the time of loading. Since the tape running system is formed in the overlapping state and the magnetic tape is driven to run through this endless dummy tape, even if an ultra-thin magnetic tape is used. It is possible to obtain a VTR that is free from damage such as partial extension and buckling of the end.

According to the invention of claim 2, since the endless dummy tape and the winding mechanism thereof are provided in the magnetic tape cassette, even in a VTR having no special structure, the same as in the invention of claim 1. The effect is obtained.

According to the third aspect of the invention, the magnetic tape cassette in the unloading state is provided because the means for stopping the winding operation of the supply side and take-up side reels is provided immediately before the end of the unloading operation. The magnetic tape inside is slackened and no tensile stress is applied to it, so no elongation occurs, and it is possible to relieve the sudden tensile stress applied by the slant pin or guide roller at the start of the loading operation. The effect of reducing the occurrence of mechanical elongation is obtained.

According to the fourth aspect of the present invention, since the magnetic tape curled in the width direction by the elastic force of the base film itself is used, the magnetic tape cassette can be stored in a slack state. Since the magnetic tape does not hang down, the loading operation is stable. Further, since the drag force against the buckling of the magnetic tape itself is increased, the effect of reducing the buckling can be obtained.

[Brief description of drawings]

FIG. 1 is a plan view showing a state during unloading of an embodiment of the invention of claim 1;

FIG. 2 is a plan view showing a loading state of the present embodiment.

FIG. 3 is a partially enlarged perspective view of a take-up side guide roller portion at the time of loading of this embodiment.

FIG. 4 is a plan view showing a state during unloading of an embodiment of the invention of claim 2;

FIG. 5 is a plan view showing a loading state of the present embodiment.

FIG. 6 is a plan view of an embodiment of the invention of claim 3;

FIG. 7 is a plan view showing a state during unloading of an embodiment of the invention of claim 4;

FIG. 8 is a plan view showing a state during unloading of a conventional VTR.

FIG. 9 is a plan view showing a state at the time of loading of this conventional example.

[Explanation of symbols]

1 magnetic tape 6 Supply side guide roller 8 rotating cylinder 10 Take-up side guide roller 13 pinch rollers 14 Capstan 20 magnetic tape cassette 20a Front recess 24 supply reels 25 take-up reels 50 endless dummy tape 50a groove 60 winding mechanism

[Procedure amendment]

[Submission date] December 19, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 3

[Correction method] Change

[Correction content]

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

The invention of claim 3 is the unloading operation.
Or at least part of the magnetic tape during eject operation
Is provided with a means for slackening in the longitudinal direction .

Claims (4)

[Claims] 1. A loading operation for pulling out a magnetic tape from a mounted magnetic tape cassette and winding the magnetic tape around a rotary cylinder to form a predetermined traveling path, and an operation for storing the suspended magnetic tape in a magnetic tape cassette. In a magnetic recording / reproducing apparatus including a loading mechanism that performs a loading operation and a tape drive mechanism that runs a magnetic tape in a loading state,
An endless dummy tape formed of an elastic material having a large friction coefficient with the magnetic tape and having a width wider than that of the magnetic tape, the outer surface of which has a groove portion having the same width as the magnetic tape and being shallower than the thickness. The endless dummy tape that is formed over the guide roller on the supply side and the guide roller on the take-up side, and the extra length of the endless dummy tape described above during unloading, And a winding mechanism that allows the magnetic tape cassette to be fed and run freely, and the endless dummy tape and the winding mechanism are provided so as to be located in the front concave portion of the magnetic tape cassette loaded in the magnetic recording / reproducing apparatus. A magnetic recording / reproducing apparatus characterized in that 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the endless dummy tape and the winding mechanism are provided in a magnetic tape cassette. 3. A magnetic device having a loading mechanism for performing a loading operation for pulling out the magnetic tape from the mounted magnetic tape cassette to form a predetermined traveling path and an unloading operation for accommodating the magnetic tape in the tape cassette. A magnetic recording / reproducing apparatus comprising: a recording / reproducing apparatus including means for stopping the winding operation of the magnetic tape by the reels on the supply side and the take-up side immediately before the end of the unloading operation. 4. The magnetic recording / reproducing apparatus according to claim 3, wherein the magnetic tape housed in the magnetic tape cassette has a cross-sectional shape curled in its width direction by its own elastic force.