JPH06251557A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent the clogging of a head from occurring and to make image quality excellent by directly cleaning a tape itself. CONSTITUTION:A tape cleaner 5 which is rotatably formed is provided at the prescribed place of the traveling path of the tape T abutting on the head. Then, the magnetic layer of the tape T is brought into contact with the cleaner 5 while the tape T travels. By the cleaner 5, the magnetic layer or the like which is going to be peeled from a tape base is eliminated in addition to dust or the like stuck to the tape T. In the case that the cleaner 5 is arranged at a position before the entering of the tape T, the magnetic layer or the like is not stuck to the head in an instant and the instantaneous clogging of the head is prevented from occurring. Then, image omission, the blacky noise on a screen or the like is prevented from occurring at a recording time and a reproducing time. Therefore, the image quality is not deteriorated and it need not be corrected by a memory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording / reproducing apparatus such as a VTR or R-DAT (rotary digital audio tape recorder) for recording / reproducing by bringing a tape into contact with a head.

[0002]

2. Description of the Related Art In a VTR, for example, a magnetic tape (hereinafter referred to as "tape") which is a tape-shaped recording medium is brought into contact with a head to perform recording and reproduction.

FIG. 5 is a plan view showing a guide drum or the like of a helical scan type VTR. In addition, in FIG.
A state in which the tape cassette is loaded in the TR and the tape is pulled out from the tape cassette by the guide pin and wound around the guide drum (state at the time of completion of loading)
Is shown.

In FIG. 1, reference numeral 1 denotes a chassis, and a tape guide drum (hereinafter referred to as "guide drum") 2 is arranged on the chassis 1 with a predetermined inclination angle. The guide drum 2 includes a lower drum (not shown) fixed to the chassis 1 and an upper drum 2a fixed to a motor shaft.
Composed of and. A rotary head (not shown) is fixed to the upper drum 2a.

Reference numerals 3 and 4 are rails, and the rails 3 and 4 are
Are formed on the left and right of the guide drum 2. The rails 3 and 4 are formed substantially along the front-rear direction as shown in FIG. Further, the rails 3 and 4 are formed so that the tape T in the tape cassette C can be pulled out to the guide drum 2 side when the tape cassette C is loaded in the VTR. The tape cassette C is provided with a plurality of posts 26 for guiding the tape T, as shown by the broken line in FIG.

Reference numerals 7 and 8 are shuttles, and the shuttles 7 and 8 are constructed so as to be movable along rails 3 and 4. The shuttle 7 is arranged on the inlet side of the guide drum 2, that is, on the left side, and the shuttle 8 is arranged on the outlet side of the guide drum 2, that is, on the right side. The shuttles 7 and 8 are configured to operate during loading and unloading.

Reference numerals 9 and 10 are guide pins, and the guide pins 9 and 10 are arranged in pairs on the shuttles 7 and 8, respectively. Further, the guide pin 9 formed so as to be rotatable.
Are mounted vertically. The guide pin 10 is
When the loading is completed, the tape T is fixed at an angle corresponding to the inclination of the guide drum 2. The guide pins 9 and 10 wind the tape T around the guide drum 1 and press it by the shuttles 7 and 8 moving from the front side to the rear side.

The guide pins 9 and 10 arranged on the shuttles 7 and 8 are arranged at symmetrical positions as shown in FIG. That is, the guide pin 10 fixed obliquely
Are arranged so as to be located on the guide drum 2 side.

As shown in FIG. 5, a guide pin 11 is fixed to the chassis 1 on the left side of the rail 3 substantially at the center. A lever (not shown) is arranged on the guide pin 11 so as to be rotatable around the guide pin 11. A full erase head 12 and a tape stabilizer 13 are fixed to this lever.

Further, the lever (not shown) is provided with an urging means for urging the lever so as to always rotate clockwise.
The lever is arranged so as to contact the shuttle 7 during loading or unloading.

That is, in the lever (not shown), as shown in FIG. 5, the full erase head 12 and the tape stabilizer 13 are always positioned on the rail 3. Also, this lever contacts the shuttle 7 during loading or unloading, so that the guide pin 1
Rotate counterclockwise around 1 and escape.

Reference numeral 14 is a guide pin, and the guide pin 14 is fixed to the chassis 1 so as to be positioned slightly behind the tape cassette C when the tape cassette C is loaded in the VTR.

Reference numeral 15 is a tension post, and this tension post 15 is fixed to a tension lever (see the chain double-dashed line in FIG. 5) 16. Tension lever 16
Are rotatably arranged on the chassis 1.

An unillustrated urging means for urging the tension lever 16 so as to always rotate counterclockwise is provided. Further, the tension lever 16 is configured such that the tension post 15 is always positioned on the right side of the rail 3 as shown by the chain double-dashed line in FIG. Furthermore, the tension lever 16 is
The tension post 15 is configured to be located between the guide pins 11 and 14 (see the solid line in FIG. 5).

At the completion of loading, the tension lever 16 rotates counterclockwise from the state shown by the chain double-dashed line in FIG. 5 to stop the tension post 15 in the state shown by the solid line in FIG. In this stopped state, the tension post 15 applies a constant tension to the tape T.

Further, the tension lever 16 is configured to rotate clockwise by the urging force of the urging means (not shown) so that the tension post 15 separates from the tape T (see the chain double-dashed line in FIG. 5). There is.

As shown in FIG. 5, the chassis 1 is provided with a control signal head 17, a guide pin 18, a capstan 19, and a pinch roller 20 sequentially arranged from the right side of the rail 4 to the right side thereof.

The pinch roller 20 is arranged so that it can be raised and lowered so as not to interfere with the pulling out or pulling back of the tape T during loading or unloading. Further, the pinch roller 20 is the capstan 1
It is arranged so that it can be brought into contact with and separated from 9.

Reference numeral 21 is a guide post, and this guide post 21 is fixed to a guide lever (see the chain double-dashed line in FIG. 5) 22. The guide lever 22 is rotatably arranged on the chassis 1.

The guide lever 22 is provided with an urging means for urging the guide lever 22 so as to always rotate counterclockwise. Also,
The guide lever 22 is arranged such that the guide post 21 is always positioned in the tape cassette C when the tape cassette C is loaded in the VTR, as shown by the chain double-dashed line in FIG. Further, the guide lever 22 is configured such that the guide post 21 is located on the right side of the pinch roller 20 when the loading is completed (see the solid line in FIG. 5).

When loading is started, the guide lever 22 rotates counterclockwise from the state shown by the chain double-dashed line in FIG. 5 and the guide post 21 stops in the state shown by the solid line in FIG.

When the tape cassette C is loaded in the VTR and a recording or reproducing operation is performed, the shuttles 7 and 8 are guided by the rails 3 and 4 to move. With this movement, the guide pins 9 and 10 pull out the tape T in the tape cassette C and wind it around the guide drum 2. Further, the tension lever 16 and the guide lever 22 rotate counterclockwise, and the tension post 15 and the guide post 21 bring the tape T to a predetermined position.

In the chassis 1, a head cleaner (not shown) for cleaning a rotary head (not shown) fixed to the upper drum 2a is provided on the upper drum 2a (rotary head).
It is arranged so that it can be moved toward and away from. Then, the head cleaner cleans a rotary head (not shown) during loading or unloading, for example. As a result, head clogs, that is, clogging of the rotary head (for example, a magnetic layer peeled from the tape base of the tape T or dust attached to the tape T is clogged in the rotary head cap or adheres to the vicinity of the cap). To be prevented.

[0024]

By the way, as described above, in order to prevent head clogs, a head cleaner (not shown) is arranged so as to be able to come in contact with and separate from the upper drum 2a of the rotary drum 2 in the related art. In this case, the head cleaner can remove the magnetic layer and the like peeled from the tape base attached to the rotary head.

However, the cause of the head clog is
The magnetic layer or the like that is about to come off from the tape base may momentarily adhere to the rotary head. In the conventional head cleaner, it is very difficult to instantaneously remove the magnetic layer and the like from the rotary head. In this case, even if the VTR has a head cleaner, the head clog may cause the screen to skip during recording and playback (image loss), or black noise may occur on the screen due to overmodulation. Etc. In this case, there arises a problem that the image quality is impaired.

Therefore, an object of the present invention is to directly clean the tape itself to prevent head clogs and improve the image quality.

[0027]

According to the present invention, in a recording / reproducing apparatus for recording / reproducing by contacting a head with a tape-shaped recording medium, the tape-shaped recording medium is provided at a predetermined position of a traveling path of the tape-shaped recording medium. The cleaner is arranged so as to abut.

[0028]

The tape T comes into contact with the cleaner 5 while the tape T is running, and the cleaner 5 removes not only the magnetic layer peeled from the tape base but also the magnetic layer that is about to peel. Therefore, for example, when the cleaner 5 is arranged at the position before the tape T abuts on the head, it is possible to prevent the magnetic layer or the like from adhering to the head instantaneously, so that the head clog caused by this can be prevented and at the time of recording. Also, it is possible to prevent image dropouts, blackout noises, and the like during reproduction. Therefore,
Since it is possible to prevent the occurrence of head clogs instantaneously, the image quality is not impaired, and it is not necessary to perform image quality correction or the like by the memory. Further, when the cleaner 5 is arranged at a position after the tape T comes into contact with the head, the tape T is cleaned at the time of recording.
You can prevent head clogs when playing.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This example is the VTR shown in FIG.
It is an example applied to. 1, parts corresponding to those in FIG. 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, 5 is a tape cleaner, and this tape cleaner 5 is arranged on a base 6. The base 6 is arranged on the rear right side of the guide drum 1. That is, the tape cleaner 5 is located at the exit side of the guide drum 2, that is, the position after the tape T comes into contact with the rotary head (hereinafter,
"It is referred to as the position after the contact of the rotary head").

The tape cleaner 5, as shown in FIG.
A cleaning roller 51 having a bearing member 52 is inserted in a support shaft 50 fixed to the base 6. Further, the cleaning roller 51 corresponds to the magnetic layer surface of the tape T when the loading is completed,
It is arranged so as to be pressed against a constant pressure against.

The cleaning roller 51 constituting the tape cleaner 5 is formed so that its surface has a slight adhesive force. As shown in FIG. 2, the bearing member 52 has a flange 52a formed on the upper portion thereof.

As shown in FIG. 2, the washer 53 is inserted into the support shaft 50 so as to come into contact with the upper surface of the bearing member 52. Further, the washer 54 is the bearing member 5 of the support shaft 50.
2 is fitted in the groove 50a formed above. A spring 55 is mounted between the washers 53 and 54. And
The spring 55 constantly urges the cleaning roller 51 downward. Further, the washer 54 prevents the cleaning roller 51 from coming off the spindle 50.

A circular ratchet 57 is arranged between the base 6 and the cleaning roller 51. As shown in FIG. 2, the ratchet 57 is composed of a ratchet upper plate 58, a ratchet lower plate 59, and the like.

As shown in FIG. 2, the ratchet upper plate 58 is formed with a lever portion 58a at a predetermined position on the outer peripheral surface thereof in a direction orthogonal to the axis. Also, the ratchet upper plate 58
As shown in FIG. 3, during the movement of the shuttle 8, the lever portion 58 a is formed on the shuttle 8 and the engaging portion 8 a is formed.
It is arranged so that it can abut. When the loading is completed, the lever portion 58a and the engaging portion 8a are configured to be held in the state shown in FIG. 3B.

The lever portion 58a is always held in the state shown in FIG. 3A. And the lever portion 5 of the ratchet 57
When 8a comes into contact (engages) with the engaging portion 8a of the shuttle 8 and rotates, the cleaning roller 51 rotates together with the ratchet upper plate 58. When the engagement is released during unloading, only the ratchet upper plate 58 is returned to the original state together with the lever portion 58a. The ratchet upper plate 58
As a returning means for the (lever portion 58a), for example, a mechanism corresponding to a heart cam mechanism may be arranged. This example is configured as described above, and is otherwise similar to the example of FIG.

In this example, when the shuttle 8 moves to the rear side of the rail 4 during loading, as shown in FIG. 3A, the engaging portion 8a of the shuttle 8 and the tape cleaner 5 are inserted.
The lever portion 58a of the. Further, when the shuttle 8 moves to the rear side of the rail 4, as shown in FIG. 3B, the lever portion 58a comes into contact with the engaging portion 8a and rotates, and the ratchet upper plate 58 (cleaning roller 51) rotates.

The cleaning roller 51 has a lever portion 58.
The fixed amount corresponding to the time Δt from the state where a and the engaging portion 8a abut to the state as shown in FIG. 3B rotates. As a result, only the same portion of the cleaning roller 51 does not always come into contact with the tape T, and the entire peripheral surface of the cleaning roller 51 can be used substantially uniformly. Therefore, the tape T can be properly cleaned.

Then, during unloading, the lever portion 58a of the ratchet upper plate 58 and the shuttle 8 are
When the engagement with the engagement portion 8a of the is released, the lever portion 58a
Only the state of FIG. 3A changes to the state of FIG. 3B.

According to this embodiment, in addition to the magnetic layer peeled off from the tape base by the tape T coming into contact with the cleaning roller 51 of the tape cleaner 5 while the tape T is running, dust attached to the tape T, and the like. Remove the magnetic layer that is about to come off from the tape base. Therefore, according to this example, since the tape cleaner 5 is disposed at the position after the contact of the rotary head, the tape T is cleaned at the time of recording or reproduction, and the head clog when the tape T is used again is obtained. It can be prevented.

That is, according to this example, it is possible to prevent the magnetic layer or the like from adhering to the rotary head (not shown) on the tape T after being cleaned, so that the head clog can be prevented. Therefore, according to the present example, it is possible to prevent image dropouts and blackening noises on the screen during recording and reproduction, and to prevent deterioration of image quality.

Even if the tape cleaner 5 is arranged at the entrance side of the guide drum 2, that is, at a position before the tape T contacts the rotary head (hereinafter referred to as "position before contact of the rotary head"), the same applies. . In this case, it is possible to prevent the magnetic layer and the like from adhering to the rotary head (not shown) in an instant, and thus to prevent head clogs in an instant. Therefore, according to this example, it is possible to prevent image dropouts and blackening noises on the screen during recording and reproduction, so that it is not necessary to perform image quality correction by the memory without deteriorating the image quality.

The base 6 is movably arranged so that the cleaning roller 51 contacts the tape T when the traveling direction of the tape T is forward (when the tape T moves from the left side to the right side), and when the reverse direction ( When the cleaning roller 51 is prevented from coming into contact with the tape T when the tape T moves from the right side to the left side), the cleaning roller 51
The binder, magnetic layer and the like attached to the tape do not adhere to the tape T running in the reverse direction.

If the base 6 is constructed to be movable,
Since the configuration becomes complicated, it is conceivable to change only the position of the tape cleaner 5 in order to solve this. For example, as shown by the alternate long and short dash line in FIG.
Is located between the guide pin 11 and the full erase head 12. In this case, as described above, during reverse, the tension lever 16 rotates clockwise and separates from the tape T, so that the tape T changes from the state shown by the solid line in FIG.
It will be in the state of the dashed line. Therefore, since the tape T is separated from the tape cleaner 5, the cleaning roller 51 contacts the tape T when the traveling direction of the tape T is forward, and the cleaning roller 51 is connected to the tape T when the tape T is in the forward direction only by considering the position of the tape cleaner 5. You can avoid contact.

Similarly, the tape cleaner 5 is placed at a position between the guide pin 14 and the tape cassette C to be loaded,
In other words, the above-described effects can be obtained even if they are arranged at the position shown by the chain double-dashed line in FIG.

FIG. 4 shows another embodiment, in which the cleaning roller 51 does not have a ratchet as shown in FIG. 2 and the cleaning roller 51 can freely rotate.

That is, the cleaning roller 51 has its lower end abutted on the receiving portion 50b formed on the support shaft 50, and the height position thereof is determined. A washer 60 is fitted in the groove 50c of the support shaft 50 at the upper end of the bearing member 52, as shown in FIG. As a result, the cleaning roller 51
Is prevented from coming off the support shaft 50. This example is configured as described above, and the other points are similar to the example of FIG.

In this example, the cleaning roller 51
Is pressed against the tape T with a constant pressure at the completion of loading, the cleaning roller 51 rotates as the tape T runs. Then, the rotating cleaning roller 51 removes dust and the like adhering to the tape T, as well as magnetic layers and the like that are about to be peeled off from the tape base. Other functions and effects are similar to those of the example of FIG.

The position of the tape cleaner 5 is not limited to the position in each of the above embodiments. Further, the number of tape cleaners is not limited to one, and a plurality of tape cleaners may be arranged. For example, in an auto-reverse type recording / reproducing apparatus, by arranging tape cleaners at positions on both sides of the head, instantaneous head clogs can be prevented even when the tape running direction is different.

Further, the structure of the tape cleaner is not limited to that of each of the above-mentioned embodiments, and if the magnetic layer or the like which is peeling off from the tape base of the tape T can be removed, for example, The same applies to a device in which a member corresponding to a cleaning roller is fixed.

Further, in each of the above-mentioned embodiments, the example of the rotary head type in which the head is rotated has been shown, but the head is not limited to this and can be similarly applied to, for example, a fixed head type. Further, although the above-mentioned respective embodiments have shown the examples applied to the VTR, other recording / reproducing devices such as R-DAT,
The same applies to compact cassettes and tape recorders.

[0052]

According to the present invention, since a cleaner is provided at a predetermined position of the tape traveling path, in addition to dust and the like adhering to the tape by the cleaner, a magnetic layer or the like that is about to be peeled from the tape base. Can be removed. Therefore, according to the present invention, since head clogs can be prevented, it is possible to prevent image dropouts and blackout noises on the screen at the time of recording and reproduction, and prevent deterioration of image quality. Also, for example,
When the cleaner is arranged at the position before the head abuts, instantaneous head clogs can be prevented, so that the image quality is not impaired and the image quality correction by the memory is not necessary.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a diagram showing a tape cleaner of an example.

FIG. 3 is a diagram showing a usage state of the embodiment.

FIG. 4 is a sectional view showing a tape cleaner of another embodiment.

FIG. 5 is a plan view of the VTR at the time of loading.

[Explanation of symbols]

 1 Chassis 2 Guide Drum 3, 4 Rail 5 Tape Cleaner 50 Spindle 51 Clinique Roller 52 Bearing Member 57 Ratchet 58 Ratchet Upper Plate 58a Lever Part 59 Ratchet Lower Plate T Tape C Tape Cassette

Claims (4)

[Claims] 1. A recording / reproducing apparatus for recording / reproducing data by contacting a head with a tape-shaped recording medium, wherein a cleaner is arranged at a predetermined position of a traveling path of the tape-shaped recording medium so as to contact the tape-shaped recording medium. Recording / reproducing apparatus characterized by. 2. The predetermined position is a position where the tape-shaped recording medium comes into contact with the cleaner when the tape-shaped recording medium travels in a forward direction and does not come into contact with the cleaner when traveling in a reverse direction. 1. The recording / reproducing apparatus according to 1. 3. The recording / reproducing apparatus according to claim 1, wherein the tape-shaped recording medium is a magnetic tape. 4. The recording / reproducing apparatus according to claim 1, wherein the cleaner is configured to rotate by a predetermined amount so that a contact position with the tape-shaped recording medium can be changed.