JPH05144139A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain miniaturization of a magnetic recording/reproducing device for pulling out a tape from the cassette of a VTR, etc., and making it to run while wrapping on a rotating drum. CONSTITUTION:The moving route of a slide chassis 7 is controlled by those engagements of guide grooves 81A, 81B and 82A, 82B, and guide pins 11A, 11B and 12A, 12B, provided in guide members 8a, 8b. By this procedure, the tape 2 is pulled out from the cassette 3 while it is moving between the position nearly parallel to the axial direction of the rotary drum 1 and the final mounting position parallel to the chassis reference surface of a main chassis 6 as a reference, then the tape 2 is wrapped on the rotary drum 1 or housed in the cassette 3. Thus, the rotation angle of the tape in the course of pulling out or housing is suppressed, and the tape can be prevented from being damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus such as a VTR, and more particularly to a magnetic recording / reproducing apparatus suitable for preventing damage to a tape and miniaturizing the tape.

[0002]

2. Description of the Related Art In a conventional magnetic recording / reproducing apparatus such as a VTR, there is a great need for miniaturization as seen in a VTR integrated camera or the like, and a mechanism including a tape running system is being miniaturized. At this time, it becomes necessary to shorten the distance between the cassette housing the tape and the rotary drum for broadcasting and home use for recording / reproducing by winding the tape. Therefore, after the tape is pulled out from the cassette, the tape is three-dimensionally twisted during the short moving distance of the tape pulling member to turn the tape running surface, obliquely wind around the rotary drum, and then run. It is necessary to make the running surface of the tape coincide with the tape storage surface of the cassette and to wind it smoothly in a short distance. The problem is to gradually apply the three-dimensional twist of the tape while pulling the tape out of the cassette so that the tape is not subjected to excessive force.

To address this problem, for example, JP-A-60-1
As disclosed in Japanese Patent No. 8850, the posture of a member for pulling out a tape from a cassette is gradually changed during the pulling-out operation of the tape, and the tape is wound around a rotating drum while turning the running surface of the tape so as to form a three-dimensional tape. A means for imparting a strong twist has been used. Here, rollers and guide pins are used as typical tape pull-out members.

[0004]

In the conventional magnetic recording / reproducing apparatus, in the process of winding the tape on the rotary drum,
The amount of attitude adjustment of the tape pull-out member (tape pull-out means) inevitably increases in the steps from the start of contact with the rotary drum, which is a place where the three-dimensional change rate of the tape is large, to the mid-winding. Therefore, there is a mounting problem that is contrary to miniaturization, such as the necessity of increasing the distance between the rotary drum and the tape pull-out member so that the tape pull-out member does not contact the rotary drum. Further, in the above step, since the turning angle of the tape given by the tape pull-out member or the like becomes relatively large, the amount of change in the running surface of the tape before and after the tape pull-out member becomes large, and the attitude of the tape pull-out member due to backlash or the like increases. The amount of change in the tape running height with respect to the error is also large. At this time, there is a problem that a tape traveling height regulating member such as a flange attached to the drawing member exerts a large regulating force on the edge of the tape, and in some cases, the tape is damaged.

It is an object of the present invention to have a compact tape running system which prevents damage to the tape without giving an excessive force to the tape even in the process of winding the tape pulled out from the cassette on a rotary drum, and downsized. It is to provide a magnetic recording / reproducing apparatus.

[0006]

In order to achieve the above object, a magnetic recording / reproducing apparatus according to the present invention is provided with a head for recording / reproducing a signal, and is arranged at a predetermined angle with respect to a chassis reference plane. Operation of the tape pull-out means in a magnetic recording / reproducing apparatus provided with a rotary drum and a tape pull-out means for pulling a tape out of a mounted cassette and winding the tape around the rotary drum or changing the turning angle of the tape running surface during storage in the cassette The configuration is such that an attitude control means for changing the movement path of the cassette in three dimensions is provided therein.

Then, a rotary drum provided with a head for recording / reproducing signals and arranged at a predetermined angle with respect to the chassis reference plane, and a tape is pulled out from the mounted cassette and wound on the rotary drum or stored in the cassette. In a magnetic recording / reproducing apparatus equipped with a tape pull-out means for changing a turning angle of a tape running surface, the cassette is moved from its mounted position toward a rotary drum toward a chassis reference plane during operation of the tape pull-out means. However, the attitude control means for rotating the chassis with respect to the chassis reference plane is provided.

Further, the attitude control means may be configured so that the cassette is moved between an inclined position substantially equivalent to the rotary drum and a position substantially parallel to the chassis reference surface on the rotary drum side.

Further, a rotary drum provided with a head for recording and reproducing a signal and arranged at a predetermined angle with respect to the chassis reference plane, and a tape is pulled out from the mounted cassette and wound on the rotary drum or stored in the cassette. In a magnetic recording / reproducing apparatus equipped with a tape pull-out means for changing a turning angle of a tape running surface, guide pins provided at respective end portions of a slide chassis on which a cassette is placed and the guide pins are inserted and guided. Attitude control means including a guide groove and a drive mechanism for moving the slide chassis is provided, and the guide groove is formed by a rotation groove toward the rotary drum and a parallel groove substantially parallel to the chassis reference surface. But it's okay.

In the magnetic recording / reproducing apparatus according to any one of claims 1 to 4, the tape pulling-out means winds the tape gradually from the upper side of the lead of the rotary drum along the lead as the cassette moves. It may be configured to be worn.

Further, in a tape attitude control method for a magnetic recording / reproducing apparatus, the magnetic recording / reproducing apparatus according to any one of claims 1 to 5 is used, and the tape is pulled out from the cassette or stored in the cassette. The moving path is changed and the turning angle of the tape running surface is controlled.

[0012]

According to the present invention, by using the attitude control means of the cassette, the running surface of the tape is sequentially changed during the operation of pulling out or storing the tape, and in particular, it is wound halfway from the step of starting winding on the rotary drum. The required turning angle of the tape running surface in the step can be kept small. Therefore, the tape is smoothly wound around the rotating drum without applying an excessive force to the tape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is a side view of the magnetic recording / reproducing apparatus of the present invention when a cassette is mounted, and FIG. 2 is a plan view of FIG. In each figure, the rotary drum 1 is a head 1A for recording and reproducing signals.
7 (shown in FIG. 7) is mounted, and the main chassis 6 is attached at a predetermined angle with respect to the chassis reference plane. The inclination angle of the rotary drum 1 is a condition for bringing the cassette 3 closer to the rotary drum 1 as much as possible and increasing the spatial mounting density in order to achieve downsizing of the entire apparatus, and recording of a signal on the tape 2 which is defined in advance. It is determined based on the constraint condition for recording / reproducing the pattern with high accuracy, and an angle of about 3 ° to 10 ° is selected. The tape 2 is wound on reels 31 and 32 and stored in the cassette 3. The cassette 3 is placed on the slide chassis 7 by the positioning pins 35 and the like. The reels 31 and 32 are driven by reel hubs 74 and 75 provided on the slide chassis 7. The tape 2 stored in the cassette 3 is drawn out by the drawing members (tape drawing means) 101 to 105, 1.
09 to 111, it is pulled out from the cassette 3 and wound around the rotary drum 1 in an oblique direction. The movement paths 14 to 16 of the pull-out members are determined so that the pull-out members do not apply an unreasonable force to the tape 2 in the process of pulling out the tape 2 and winding it around the rotary drum 1. As a more specific means for determining the moving path, the tape 2 does not interfere with other members such as the flanges 104A and 104B with respect to the position and the posture of the drawer member and the cassette 3 at any time. Adjust the position and orientation of the drawer member so that it can be mounted between the drawer members,
In order to realize this, the movement routes 14 to 16 are obtained by using a three-dimensional CAD or the like. The slide chassis 7 is driven by a loading motor (driving mechanism) 5, and the tape 2
Is completely mounted on the rotary drum 1 (Figs. 5 and 6)
The cassette 3 is rotated with respect to the chassis reference surface while sliding the cassette 3 toward the rotation drum 1 in the direction of the chassis reference surface so that the size of the entire apparatus in FIG. At this time, the guide grooves 81A, 81B and 8 formed by the rotation grooves and parallel grooves of the guide members 8A and 8B provided on both side surfaces of the main chassis 6.
By engaging the guide pins 11A, 11B, 12A, and 12B provided on the slide chassis 7 with 2A and 82B, the three-dimensional attitude of the slide chassis 7 and the cassette 3 on the slide chassis 7 is being drawn. Can be controlled. The attitude control means is composed of, for example, a guide pin, a guide groove, a drive mechanism, and the like.

Next, the outline of the operation will be described with reference to FIGS. FIG. 2 is a plan view of the state where the cassette 3 is mounted on the slide chassis 7 as described above. At this time, the tape 2 in the cassette 3 is pulled out from the pull-out members 101 to 101.
It is not in contact with any of 105 and 109 to 111. FIG. 3 shows that the drawer members 110 and 111
The tape 2 is slightly pulled out from the cassette 3, and the pull-out member 104 has started contact between the tape 2 and the rotary drum 1. At this time, since the rotary drum 1 is tilted at a predetermined angle with respect to the main chassis 6 as described above, if the tape 2 is pulled out in parallel with the main chassis 6 as is conventionally done, the tape 2 is In order to correct the twist by the rotating drum 1 and prevent an unreasonable force from being applied to the tape, it is necessary to incline the pulling member 104 in the direction opposite to the rotating drum 1 by an angle equivalent to the inclination angle of the rotating drum 1. .. However, tape 2 is rotating drum 1
In the state immediately before the contact with the tape 2, the pull-out member 104 does not apply excessive force to the tape 2 so that the tape 2
Must be parallel to. Therefore, during the extremely short moving distance of the pullout member 104, the pullout member 10 is
Since the posture of No. 4 is inclined from the position parallel to the main chassis 6 by an angle corresponding to the inclination angle of the rotary drum 1, the pulling member 104 and the tape 2 pulled by the pulling member 104 move unreasonably, and an excessive force is applied to the tape 2. The possibility of joining will increase. In addition, it is difficult to realize a mechanism for giving the above-mentioned change in the posture of the drawer member 104 in mounting in a short movement distance, and the operational reliability of the structure is likely to be impaired. Therefore, in this embodiment, the slide chassis 7 is previously tilted by an angle corresponding to the tilt angle of the rotary drum 1 by using the above-described attitude control mechanism (posture control means) of the slide chassis 7. Therefore, the tape 2 starts to come into contact with the rotary drum 1 in parallel or substantially in parallel at the position corresponding to this operation, and the twist generated in the tape 2 is limited to zero or a very small angle close to zero. At this time, the pull-out member 104 is attached to the rotary drum 1 with respect to the main chassis 6.
It suffices that the pulling member 1 is tilted by an amount corresponding to the tilt angle, and it may be parallel or almost parallel to the tape 2.
A large posture change of 04 is unnecessary, and the possibility that unreasonable force is applied to the tape 2 is extremely small. Figure 4
FIG. 4 is a plan view of the device at a position where the winding operation has further advanced from FIG. 3. At this position, the tape 2 starts to contact the inclined guide 107 on the main chassis 6,
Is a position where the twist of the can is corrected by the tilt angle of the tilt guide 107. In this case, the drawer members 101-10
5 and the tilt guide 107 make it possible to correct the twist of the tape 2 caused by the rotating drum 1. Therefore, the attitude of the cassette 3 should be brought to a position parallel or nearly parallel to the chassis reference plane of the main chassis 6. Is possible. The attitude control of the cassette 3 can be realized by the shape of the guide grooves 81A to 81B described in FIG.

FIG. 5 shows a plan view of the device in a completely mounted state, and FIG. 6 shows a side view of the same state. In this state, the pull-out members 101 to 105 are pressure-bonded to the positioning members 60 to 62 provided at the ends of the movement paths 14 to 16, respectively,
The winding operation of the tape 2 on the rotary drum 1 is completed.
At this time, the tape 2 is a tape pulling member 109, 110 from the cassette 3, the tilt guides 107, 108, the pulling members 102, 101, the rotary drum 1, the pulling member 10.
3, 104, 105, the tape guide 108, the shaft 4 of the capstan motor 40, and the pull-out member 111 are wound around the capstan motor 40 at a predetermined angle.
The shaft 4 and the pinch roller 41 (shown in FIGS. 1 and 7) are pressed and driven. In this state, in order to miniaturize the apparatus, it is necessary to bring the cassette 3 and the rotary drum 1 as close as possible without interfering with each other, and the slide chassis 7 is guided to the main chassis 6 by the guide grooves 81A to 82B. , And other driving means (not shown) such as an actuator, a cam or a slider
Is positioned at a predetermined position.

In this embodiment, by using the guide members 8A and 8B having the guide grooves 81A to 81B of a predetermined shape and the guide pins 11A and 11B as the attitude control means of the slide chassis 7 on which the cassette 3 is placed. , The posture can be three-dimensionally controlled while moving the cassette 3 during the tape drawing operation in the direction of approaching the rotary drum 1.
With a simple structure, the tape winding operation can be performed smoothly without applying excessive force to the tape.

Regarding the operation of storing the tape 2 in the cassette 3, the tape 2 can be smoothly stored in the cassette 3 in exactly the same manner by reversing the order of the operations described above.

FIG. 7 is a perspective view of the rotary drum 1. The lead 1B provided on the rotary drum 1 provided with the head 1A is
The tape pulling member guides the tape 2 and stably runs the tape 2, and the tape pull-out member gradually moves the tape 2 from the upper side of the lead 1B as the cassette moves.
By winding the tape along the line, the posture control of the tape 2 becomes more stable.

[0019]

According to the present invention, since the attitude control means of the cassette is provided, the turning angle of the tape in the process of pulling out the tape from the cassette or storing the tape in the cassette can be suppressed to be small, and damage to the tape can be prevented. It is possible to provide a magnetic recording / reproducing device which is prevented and downsized.

[Brief description of drawings]

FIG. 1 is a side view showing a mounted state of a cassette according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a plan view showing a tape winding operation start state of the embodiment of FIG.

FIG. 4 is a plan view showing the tape winding operation in the embodiment of FIG.

5 is a plan view showing the tape winding operation completed state of the embodiment of FIG. 1. FIG.

FIG. 6 is a side view of FIG.

7 is a perspective view of the rotary drum shown in FIG. 1. FIG.

[Explanation of symbols]

1 Rotating Drum 1A Head 1B Lead 2 Tape 3 Cassette 4 Capstan Motor 5 Loading Motor 6 Main Chassis 7 Slide Chassis 8A, 8B Guide Members 81A, 81B, 82A, 82B Guide Grooves (Posture Control Means) 11A, 11B, 12A, 12B Guide pins 101 to 104, 109 to 111 Tape drawing member (tape drawing means) 14 to 16 Moving path of tape drawing member 60 to 62 Positioning member for tape drawing member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenji Fuse, Kenji Fuse, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Inside the Hitachi Media Video Media Research Institute (72) Inventor, Hiroshi Wakayama 1410 Inada, Katsuta-shi, Ibaraki Hitachi Tokai Plant

Claims (6)

[Claims] 1. A rotary drum provided with a head for recording / reproducing signals and arranged at a predetermined angle with respect to a chassis reference plane, and a tape is pulled out from a mounted cassette and wound on the rotary drum or to the cassette. A magnetic recording / reproducing apparatus provided with a tape pull-out means for changing a turning angle of a tape running surface during storage, comprising attitude control means for three-dimensionally changing a movement path of the cassette during operation of the tape pull-out means. A magnetic recording / reproducing apparatus characterized by the above. 2. A rotating drum provided with a head for recording / reproducing signals and arranged at a predetermined angle with respect to a chassis reference plane, and a tape is drawn from a mounted cassette and wound on the rotating drum or to the cassette. In a magnetic recording / reproducing apparatus provided with a tape pull-out means for changing a turning angle of a tape running surface during storage, the chassis from the mounting position of the cassette to the rotary drum while the tape pull-out means is in operation. A magnetic recording / reproducing apparatus comprising an attitude control means for rotating the carriage with respect to the chassis reference plane while moving in the direction of the reference plane. 3. The attitude control means moves the cassette between an inclined position substantially equivalent to the rotary drum and a position substantially parallel to the chassis reference surface on the rotary drum side. Or the magnetic recording / reproducing apparatus according to 2. 4. A rotary drum provided with a head for recording / reproducing signals and arranged at a predetermined angle with respect to a chassis reference plane, and a tape is pulled out from a mounted cassette and wound on the rotary drum or to the cassette. In a magnetic recording / reproducing apparatus provided with a tape pull-out means for changing a turning angle of a tape running surface during storage, a guide pin provided at each end of a slide chassis on which the cassette is placed and each guide pin are inserted. And a guide mechanism for guiding the slide chassis and a drive mechanism for moving the slide chassis, and the guide groove is parallel to the rotation groove toward the rotary drum and substantially parallel to the chassis reference plane. A magnetic recording / reproducing apparatus characterized by being formed by a groove. 5. The magnetic recording / reproducing apparatus according to claim 1, wherein the tape pull-out means gradually moves the tape from above the lead of the rotary drum along the lead as the cassette moves. A magnetic recording / reproducing apparatus characterized by being wound. 6. The magnetic recording / reproducing apparatus according to any one of claims 1 to 5, wherein the moving path of the cassette is changed while the tape is pulled out from the cassette or stored in the cassette.
A tape attitude control method for a magnetic recording / reproducing apparatus, characterized in that a turning angle of a tape running surface is controlled.