JPH0981996A - Recording or reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely position a tape control member for preventing a tape from getting over a rotary drum on the way of loading to the rotary drum. SOLUTION: The tape control member 20 fixed onto a main chassis 1 and provided extendedly upward the rotary drum 3 is provided with a partial cylindrical surface 21, an abutting part 22 and an engagement part 23, and the member 20 has elasticity. The abutting part 22 of the tape control member 20 is abutted on a drum rotary shaft 3a by elastic energizing force to be positioned until just before the loading ends. The get-over of the tape 16 is prevented by the partial cylindrical surface 21 on the way of loading. In the state that the loading by moving a slide chassis on which loading a cassette is loaded has ended, the upper end part of a drive member provided on the slide chassis is engaged with the engagement part 23 of the tape control member 20, and the tape control member 20 is pushed upward, and the abutting part 22 is separated from the drum rotary shaft 3a to be positioned. The tape control member 20 comes into a perfect non-contact state with drum rotation at a tape running time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording or reproducing apparatus such as a VTR, and more particularly to a recording or reproducing apparatus provided with a tape regulating member for preventing a tape from getting over a rotating drum during loading. is there.

[0002]

2. Description of the Related Art For example, in a VTR, there is an increasing number of devices that move a cassette to the vicinity of a rotary drum after mounting the cassette, in response to a demand for miniaturization. In the case of this method, in order to increase the movement amount of the cassette in order to further reduce the size, it is necessary to insert the rotary drum relatively deep into the cassette opening, so the position of the rotary drum must be lowered.

When the position of the rotary drum is low, the tape may get over the rotary drum while the tape is being loaded onto the rotary drum. For this reason, a tape regulating member having a cylindrical surface having substantially the same diameter as the rotating drum is arranged on the upper part of the rotating drum to prevent the tape from passing over the rotating drum by contacting the tape with the cylindrical surface during loading. There is a device.

[0004]

However, in the apparatus provided with the tape regulating member as described above, it is necessary to position the tape regulating member with high precision so as not to contact the rotating drum. For this reason, it is necessary to finish the mounting surface of the tape regulation member and the chassis with secondary processing with high precision, and to secure a wide mounting surface.
There are drawbacks such as an increase in cost and a deterioration in space factor.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a recording or reproducing apparatus which can easily and surely position a tape regulating member with respect to a rotating drum.

[0006]

In order to achieve the above object, the present invention provides a rotary drum having a recording or reproducing head, and an upper part of the rotary drum having a cylindrical surface having substantially the same diameter as the rotary drum. In a recording or reproducing device configured to bring the tape into contact with the cylindrical surface of the tape regulation member during the loading of the tape onto the rotary drum. In addition, it is configured such that it is brought into contact with the rotary drum during loading and separated from the rotary drum when the loading is completed.

In the above recording or reproducing apparatus,
It is characterized in that the tape regulation member is brought into contact with the rotary drum by an elastic biasing force and is driven against the elastic biasing force to be separated from the rotary drum.

In the above recording or reproducing apparatus,
A brake torque is applied to the rotating drum by bringing the tape regulating member into contact with the rotating drum.

Further, in the above recording or reproducing apparatus,
The contact portion provided on the tape regulating member is brought into contact with the shaft portion of the rotary drum.

Further, the recording or reproducing apparatus includes a first chassis on which the rotary drum and the tape regulating member are arranged, and a second chassis on which a cassette is mounted, and the cassette is mounted. The second chassis is slid relative to the first chassis in the direction of the rotary drum, and the tape is pulled out from the opening of the cassette so that at least a part of the rotary drum is inside the opening of the cassette. It is characterized in that it is inserted relatively to the tape and the tape is loaded in a predetermined path including the drum peripheral surface.

Further, in the above recording or reproducing apparatus,
The tape regulation member is brought into contact with the rotary drum by an elastic biasing force, a drive member is provided on the second chassis, and the tape regulation is completed before the completion of loading the drive member as the second chassis slides. By engaging with a member, the tape regulation member is separated from the rotating drum against the elastic biasing force.

[0012]

In the present invention constructed as described above, the tape regulating member is positioned by contacting the rotating drum during loading, and the tape rotates while contacting the cylindrical surface of the tape regulating member during loading. It is prevented to get over the drum. Then, in the loading completed state, the tape regulating member is separated from the rotating drum, so that the tape regulating member is completely out of contact with the rotation of the drum during tape running. Since the positioning of the tape regulating member with respect to the rotating drum is simplified in this way, it is necessary to finish the mounting surface of the tape regulating member and the chassis by secondary processing with high precision, or to secure a wide mounting surface. Disappear.

Further, when the tape regulating member is brought into contact with the rotary drum by an elastic urging force and the tape is separated by driving against the elastic urging force, the positioning in the separated state becomes more reliable with a simple structure. . Particularly, in the case of a system in which the second chassis having the cassette mounted therein is relatively slid in the direction of the rotating drum, the second chassis is provided with a drive member engaged with the tape regulating member. Since the tape regulating member is separated from the rotating drum before the loading is completed in conjunction with the sliding of the chassis, the positioning operation can be surely performed with a simple structure.

Further, when the brake torque is applied to the rotating drum by the contact of the tape regulating member, the rotating drum is likely to stop even if the tape adheres to the rotating drum due to dew condensation, for example. Further, when the contact portion of the tape regulating member is brought into contact with the shaft portion of the rotary drum, there is no adverse effect on the rotary drum that requires high accuracy.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments in which the present invention is applied to a VTR will be described below with reference to the drawings. FIG. 1 is a front view of the main part in the unloading state (viewed along the line AA in FIG. 4), and FIG. 2 is the main part in the loading completion state (B- in FIG. 5).
FIG. 3 is an enlarged side view of an engaging portion between the tape regulating member and the drive member (viewed by the line CC in FIG. 2), and FIG. 4 is a plan view in an unloading state. 5 is a plan view of a loading completed state.

First, the outline of the VTR according to this embodiment will be described with reference to FIGS. Reference numeral 1 is a main chassis which is a first chassis, 2 is a slide chassis which is a second chassis, and slide chassis 2 is a main chassis 1
It is configured to be slidable in the directions of arrows a and b above. Reference numeral 3 denotes a rotary drum arranged on the main chassis 1 in a tilted manner, and has a magnetic head for recording or reproducing mounted thereon.
4 is a capstan protruding above the main chassis 1, 5 and 6 are tape guide members for pulling out the tape, 7 and 8 are movable tape guides, 9 is a fixed tape guide, and 10 and 11 are installed on the slide chassis 2. It is a pair of reel stands. A tape cassette 15 stores a pair of reels 17 and 18 around which a magnetic tape 16 is wound.

In the VTR, as shown in FIG. 4, first, the cassette 15 is mounted on the slide chassis 2 which is moved back in the direction of the arrow b, and both reels 17 and 18 are mounted.
After being fitted on both reel stands 10 and 11, the slide chassis 2 is slid in the direction of arrow a, which is relatively close to the rotating drum 3 with respect to the main chassis 1, and the tape guide members 5 and 6 are provided. Thus, the tape 16 is pulled out from the opening 15a of the cassette 15. Finally, as shown in FIG. 5, at least a part of the rotary drum 3 is relatively inserted into the opening 15 a of the cassette 15, and the tape 16 is spirally wound around the peripheral surface of the rotary drum 3. It is loaded in a predetermined path including winding. In this state, the tape 16 is pressed against the capstan 4 by a pinch roller (not shown), the tape 16 is run, and desired recording or reproduction is performed by the head of the rotary drum 3.

Next, the tape regulating member provided on the VTR will be described. As shown in FIGS. 1 to 4, the tape regulation member 20 is attached to the main chassis 1 at the mounting portion 20a.
It is fixed above and extends substantially horizontally above the rotary drum 3, and functions as a so-called drum cover. The tape regulating member 20 is a partial cylindrical surface 21 having substantially the same diameter as the outer peripheral surface of the rotating drum 3 and a substantially same diameter, and the rotating shaft 3 of the rotating drum 3.
a tongue-shaped contact portion 22 capable of contacting a, a drive member 2 described later
It has a concave engaging portion 23 that can be engaged with 5. In addition,
The tape regulating member 20 is formed by, for example, resin molding or sheet metal pressing, and has elasticity itself.

The driving member 25 has a pin shape and is planted substantially vertically on the slide chassis 2. As shown in FIG. 3, the driving member 25 has a tapered surface 25a at its upper end. When the loading is completed by the movement of the slide chassis 2, the upper end portion of the drive member 25 has the engagement portion 23 of the tape regulation member 20.
Is engaged with.

In the above configuration, in the unloading state shown in FIG. 4, the drive member 25 is also in the position shown in FIG. 4 due to the backward movement of the slide chassis 2. Therefore, as shown in FIG. Is urged in the direction of arrow c by the elastic force of the
Is in contact with the upper end of the drum rotation shaft 3a. By this contact, the tape regulating member 20 is positioned with respect to the rotary drum 3, and a slight brake torque is applied to the rotation of the rotary drum 3. Since the portion pressed by the contact portion 22 is the drum rotating shaft 3a portion, there is no adverse effect on the rotating drum 3 which requires high accuracy.

Then, the loading operation is started as described above. At this time, the tape 16 is at the position shown by the phantom line in FIG.
Since 1 is located above the rotary drum 3, the tape 16 is prevented from climbing over the top of the rotary drum 3 during loading. At this time, the partial cylindrical surface 21 and the rotary drum 3 are positioned by the contact of the tape regulating member 20.
Since the gap d between and can be set as small as possible in the non-contact state, it is possible to prevent the tape 16 from being caught in the gap when the tape 16 is prevented from getting over. Subsequently, the tape 16 is gradually wound around the rotary drum 3. At this time, since the brake torque is applied to the rotary drum 3 due to the contact of the tape regulating member 20, the tape 16 is not attached when, for example, dew condensation occurs. Even if it adheres to the rotating drum 3, the rotating drum 3 can be easily stopped, and the winding of the tape 16 can be prevented.

At the time of loading, the drive member 25 is also moved in the same direction as the slide chassis 2 is moved in the direction of arrow a, and the upper end portion of the drive member 25 is in the loading completion state shown in FIGS. 2 and 5. Is the tape regulation member 2
It is engaged with the engaging portion 23 of 0. Immediately before the completion of the loading, as shown in FIG. 3, the upper edge of the engaging portion 23 of the tape regulating member 20 is pressed by the taper surface 25a of the upper end portion of the drive member 25 which is moved in the direction of the arrow a. The regulation member 20 is elastically deformed and pushed upward (in the direction of arrow e). As a result, the contact portion 22 of the tape regulating member 20 is separated from the drum rotation shaft 3a. Then, the brake torque applied to the rotary drum 3 is also released.

When the loading is completed, the drive member 25 continues to push up the tape regulating member 20, and the abutting portion 22 of the tape regulating member 20 is moved to the drum rotating shaft 3
It is held in a non-contact state with a. Therefore, the tape regulating member 20 has no adverse effect on the rotation of the drum when the tape is running. At this time, since the gap f between the partial cylindrical surface 21 and the rotary drum 3 becomes larger than the gap d at the time of contact due to the positioning by separating the tape regulating member 20, the partial cylindrical surface 21 is not in contact with the drum rotation. It becomes possible to further enhance safety.

As described above, the tape regulation member 20 is positioned in contact with the rotary drum 3 immediately before the completion of loading, and is positioned away from the rotary drum 3 in the completed loading state. Therefore, the rotating drum 3
Positioning of the tape regulation member 20 with respect to
Attachment part 20 of tape regulation member 20 and main chassis 1
It eliminates the need for high-precision secondary machining of a.
The area of a can also be reduced.

It is possible to switch between the contact state and the separated state of the tape regulating member 20 by a dedicated drive mechanism, but in particular, as in the present embodiment, the contact is made by the elastic force of the tape regulating member 20 itself. If the drive member 25 interlocked with the movement of the slide chassis 2 is performed by the force and the elastic member is separated from the elastic force, the positioning operation can be reliably performed with a simple structure.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various effective modifications and applications are possible based on the technical idea of the present invention. For example, in the embodiment, the tape restricting member itself has elasticity, but an elastic member such as a spring is attached to the tape restricting member, and the elastic biasing force is used to bring the tape restricting member into contact with the rotating drum. You may urge to. Further, it is possible to arbitrarily set the brake torque to the rotating drum by appropriately changing the material of the contact portion of the tape regulating member. Further, although the brake torque cannot be applied, the contact portion of the tape regulating member may be brought into contact with the fixed central axis of the rotary drum.

[0027]

As described above, according to the present invention,
The tape regulating member is brought into contact with the rotating drum during loading and is separated from the rotating drum when the loading is completed, so that the positioning of the tape regulating member with respect to the rotating drum is simplified and the mounting surface of the tape regulating member and the chassis is highly accurate. Since secondary processing is unnecessary and the area of the mounting surface can be reduced, it is possible to reduce the cost and improve the space factor.

Further, since it is possible to apply the brake torque to the rotating drum by the contact of the tape regulating member during the loading, even if the tape adheres to the rotating drum at the time of dew condensation, for example, the rotating drum. Can be stopped easily, and the tape can be prevented from being wound up.

Further, since the conventional tape regulation member is of a fixed type, the gap between the cylindrical surface and the rotary drum is constant, but according to the present invention, the gap between the cylindrical surface and the rotary drum is in the contact state of the tape regulation member. Since it is possible to reduce the size of the tape, it is possible to prevent the tape from being caught in the above-mentioned gap when restricting the tape from passing over during loading, and to increase the gap between the cylindrical surface and the rotating drum in the separated state. Therefore, it is possible to further improve the safety of non-contact of the cylindrical surface when the drum is rotated in the loading completion state.

[Brief description of drawings]

FIG. 1 is a front view taken along the line AA of FIG. 4 showing a main part in an unloading state in an embodiment in which the present invention is applied to a VTR.

FIG. 2 is a front view taken along the line BB of FIG. 5 showing a main part in a loading completed state in the embodiment.

FIG. 3 is an enlarged side view taken along the line C-C of FIG. 2 showing an engaging portion between the tape regulating member and the driving member in the above embodiment.

FIG. 4 is a plan view showing an entire unloading state in the above embodiment.

FIG. 5 is a plan view showing the entire loading completion state in the above embodiment.

[Explanation of symbols]

 1 Main Chassis 2 Slide Chassis 3 Rotating Drum 3a Rotating Shafts 5 and 6 Tape Guide Member 15 Tape Cassette 15a Opening 16 Magnetic Tape 20 Tape Restricting Member 20a Mounting Part 21 Partial Cylindrical Surface 22 Abutting Part 22a Projecting Part 23 Engaging Part 25 Drive member 25a Tapered surface

Claims (6)

[Claims] 1. A rotary drum having a recording or reproducing head, and a tape regulating member having a cylindrical surface of substantially the same diameter as that of the rotary drum and arranged on an upper portion of the rotary drum. In a recording or reproducing device configured to bring the tape into contact with the cylindrical surface of the tape regulation member during the loading of the tape, the tape regulation member is brought into contact with the rotary drum during loading, and in a loading completed state. A recording or reproducing apparatus, characterized in that it is configured to be separated from the rotating drum. 2. The tape regulation member is brought into contact with the rotary drum by an elastic biasing force, and is driven against the elastic biasing force to be separated from the rotary drum. Recording or playback device. 3. The recording or reproducing apparatus according to claim 1, wherein a brake torque is applied to the rotary drum by bringing the tape regulating member into contact with the rotary drum. 4. The recording or reproducing apparatus according to claim 1, wherein a contact portion provided on the tape regulating member is brought into contact with a shaft portion of the rotary drum. 5. A first chassis in which the rotating drum and the tape regulation member are arranged, and a second chassis in which a cassette is mounted are provided, and the second chassis in which the cassette is mounted is the second chassis. And slide the tape relative to the chassis in the direction of the rotary drum and pull out the tape from the opening of the cassette so that at least a part of the rotary drum is relatively inserted into the opening of the cassette. The recording or reproducing apparatus according to claim 1, wherein the tape is configured to be loaded in a predetermined path including the drum peripheral surface. 6. The tape regulating member is brought into contact with the rotary drum by an elastic biasing force, a drive member is provided on the second chassis, and the loading of the drive member is completed as the second chassis slides. 6. The recording or reproducing apparatus according to claim 5, wherein the tape regulating member is separated from the rotary drum against the elastic biasing force by engaging the tape regulating member in advance.