JPS63317967A - Magnetic tape loading device - Google Patents

Abstract

PURPOSE:To shorten a loading time by loading a video cassette by locating at the vicinity of a rotary head drum and sliding this rotary head drum inside the video cassette. CONSTITUTION:The cylinder having a rotary head drum 3 is placed vertically on the sliding base 21 formed on a chassis 20 and made to slide this sliding base 21. As a result, in the case of loading a video cassette 1, each roller and inclined posts 8, 9, 10, 11 come into a magnetic tape 2, when the video cassette 1 is stored into a magnetic tape recording and reproducing device, and the rotary head drum 3 comes into a receiving port 1a as well with the cylinder being slided forwards and a loading is executed by pressing the magnetic tape 2 to each roller and a inclined posts 8, 9, 10, 11. Due to the rotary head drum being able to be entered into the video cassette the loading distance is shortened and the time can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Applications> The present invention relates to a magnetic tape loading device for recording or reproducing information on a magnetic tape using a helical scan method.

<Prior Art and Problems> FIG. 9 is a plan view showing a loading mechanism of a VTR device of the M loading method. In the figure, 1 is a video cassette, la is a supply reel, 1b is a take-up reel, 2 is a magnetic tape, 3 is a rotating head drum, 4 and 5 are magnetic heads,
6.7 is an impedance roller, 8, 9 is a flange 4-
10.11 is a tilted post, 12 is a pinch roller, 1
3 is a capstan.

In this M loading method, when unloading, the flanges 8 and 9 and the inclined posts 10 and 11 located at the positions indicated by the dotted lines in the figure move to the positions indicated by the solid lines. The magnetic tape 2 at the position is wound around the rotary head drum 3 as shown by the solid line. At this time, the flange roller 8 and the inclined post 10 and the flange ruler 9 and the inclined post 11 form a pair (this pair is called a loading ball) and move in parallel. Furthermore, the pinch roller 12 also moves from the position shown by the dotted line in the figure to the position shown by the solid line.

In this MO-ding method, the magnetic heads 4 and 5 are attached to a chassis (not shown) in an inclined state in order to create a helical scan pattern on the magnetic tape 2 by the rotation of the rotating head drum 3, and the magnetic tape 2 is also attached to the rotating head. It is wound around the lower surface of the drum 3 at a predetermined angle of inclination (this is called a lead angle). The angle of this winding is approximately 180
°.

By the way, in M loading, 180° winding has an angle according to the standard, but
When winding the magnetic tape 2, there is a problem that the moving distance of the loading pole becomes long as described above, making it impossible to perform loading in a short time.

On the other hand, in recent years, efforts have been made to downsize magnetic tape recording and reproducing devices using the helical scan method, including VTR devices, and shorten loading time (shorten access time). Efforts are being made to make the wire as close to a straight line as possible to enable recording and playback without having to wrap the wire up to 180 degrees.

The present invention provides a magnetic tape loading device in which the loading distance is shortened on the premise that the winding corners of the magnetic tape are made smaller as part of the reduction in loading time.

Means for Solving Problems〉 The present invention achieves the above-mentioned object, and when the video cassette is installed in a magnetic tape recording/reproducing device, the magnetic tape stored in the video cassette is read by a magnetic head attached to the video cassette. A magnetic tape loading device for winding a rotating head drum at a predetermined lead angle includes roller guide means for a guide 11-ra to enter into the video cassette when the video cassette is stored, and a roller guide means for pressing the magnetic tape against the guide roller. and sliding means for sliding the rotary head drum into the video cassette.

According to the present invention having the above configuration, the video cassette is mounted near the rotating head drum, and the rotating head drum is slid into the video cassette.
The loading distance is shortened and the loading time is shortened.

Embodiments Here, embodiments of the present invention will be described with reference to FIGS. 1 to 8. In addition, in FIGS. 1 to 8, the same parts as in FIG. 9 are given the same reference numerals. In FIG. 1, a 7.
As shown in FIG. 2, the Er cylinder is placed perpendicularly on a slide base 21 formed on the chassis 20, and is able to slide on this slide base 21. Here, the cylinder has a structure in which a motor 3M is provided on a base 3S, and a rotary head drum 3 is provided on the motor 3M. This cylinder slides back and forth within the slide base 21 so as to approach or move away from the video cassette 1 housed in the magnetic tape recording/reproducing apparatus.

Stoppers 22a are provided at the front and rear ends of the slide base 21.

22b is provided to restrict the movement of the cylinder and to ensure accurate positioning. As means for sliding the cylinder, there are driving means such as a solenoid drive, a worm gear, a rack and pinion, etc. that converts rNJ rotation into linear motion, and for sliding, in practice, a sliding surface made of a V-groove, etc. An example is a method in which the base 3s moves on the top.

On the other hand, if a video cassette 1 is to be stored in a magnetic tape recording/reproducing apparatus, a receiving opening 1a is formed so that a rotary head drum 3 can be inserted therein. Then, the magnetic tape 2 is inserted into the cassette guide 23a and 2 so as to cross this receiving opening 1a.
It is bridged between 3b and 3b.

Further, in the receiving opening 1a of the video cassette 1, a flange roller 8 for horizontally guiding the magnetic tape 2 is arranged so that the magnetic tape 2 is wound around the rotary head drum 3 at a predetermined lead angle. a tilted post 10, and a tilted post 11 for correcting the running direction of the magnetic tape 2 wound around the rotary head drum 3 and tilted with respect to the horizontal direction to the horizontal direction;
, and a flange roller 9 for guiding the magnetic tape 2 in the horizontal direction. Guide holes are provided so that each of the flange rollers 9 enters from the bottom surface of the video cassette 1.

In this case, flange rollers 8, 9, (11 diagonal boss) 10
. ,9゜10
．． 11 may be inserted into the guide hole, and each of the four cassettes may be inserted into the guide hole of the stored video cassette 1 from the chassis side.
The rear and inclined posts may also be made to protrude.

As a result, when recording video cassette 1,
When the video cassette 1 is stored in the magnetic tape recording/reproducing device, the magnetic tape 2 in the receiving opening 1a of the video cassette 1 is inserted.
The rollers and the inclined posts 8, 9, 10, 11 are inserted into the inside of the rollers and the inclined posts 8, 9, 10, 11, the cylinder is slid forward and the rotary head drum 3 is inserted into the receiving opening 1a, and the magnetic tape 2 is inserted into the rollers and the inclined posts 8, 9, 10, and 11, loading is performed in the state shown by the broken line in FIG. In the case of unloading, the cylinder retreats rearward and the rotary head drum 3 leaves the receiving opening 1a, so that the magnetic tape 2 becomes in the solid line state shown in FIG. 1.

3 and 4 show an example in which the cylinder is placed perpendicularly to the chassis 20. The difference in structure from FIG. 1 is that in FIG. 4 shows a structure in which an inclined post 24 is added. Here, the inclined post 24 changes the running direction of the magnetic tape 2 whose tape running direction was changed by the inclined post 11 to the horizontal direction, and also allows the magnetic tape to be wound around the rotary head drum 3 with a predetermined lead angle. The height position of the magnetic tape 2 is made to match the height position of the magnetic tape 2 at the flange roller 8. In addition, the inclined post 25 is used together with the inclined post 10 to give the magnetic tape 2 a predetermined lead angle, and the tape winding around each post has fewer corners than when only the inclined post 10 is used. This is to ensure smooth tape running by reducing friction.

Due to this structure, the inclined post 10.11 and the flange rollers 8, 9 enter the video cassette 1 from below at the receiving opening 1a, but the inclined post 2
4 and 25 are located on the same side with respect to the rotary head drum 3 and the magnetic tape 2, so that they slide in the same way as the rotary head drum 3 and are placed in a predetermined position during loading.

1 to 4 show examples in which the rotary head drum 3 is vertical, but in FIGS. 5 to 8, the rotary head drum 3 is not mounted vertically but at an inclined angle β to the chassis 20. Give an example. Therefore, the slide base 21 of the chassis 20 also forms an inclination angle β.

During loading, the rotating head drum 3 and the inclined post 24 slide into the receiving port 1a in FIGS. 5 and 6, but the rotating head drum 3 and the inclined post 24 in FIGS. 7 and 8 24 and 25 slide into the receiving opening. At the same time, the flange 4.9 in the receiving opening la of the cassette 1 is placed in a predetermined position in conjunction with the movement of the external rotary head drum 3 and the inclined posts 24, 25. From the standpoint of manufacturing, it is preferable that the posts that slide into the receiving port 1a from the outside be placed on the same movable table as the rotary head drum 3.

In addition, in FIGS. 1 to 8, the winding angle of the magnetic tape 2 is approximately 90 degrees, and this may be intended to reduce the size of the device as the diameter of the rotary head drum 3 is reduced. be.

Also, when the video cassette 1 is installed, the rotating head drum 3
In order to shorten the loading distance, the arrangement position of the rotary head drum 3 and the video cassette mounting position are arranged as close as possible so that the video cassette 1 is located in the immediate vicinity of the rotary head drum 3 when the rotary head drum 3 is retracted. can do.

<Effects of the Invention> As explained above, according to the present invention, the rotating head drum can be inserted into the video cassette, so that the loading distance can be shortened.

[Brief explanation of drawings]

Fig. 1 is a plan view of the first embodiment of the present invention, Fig. 2 is an explanatory diagram of the sliding movement of the rotary head drum, Fig. 3 is a front view of the second embodiment, and Fig. 4 is a diagram of the third embodiment. A plan view of the embodiment, FIG.
6 is a plan view thereof, and FIG. 7 is a front view of the embodiment.
8 is a plan view thereof, and FIG. 9 is an explanatory diagram of conventional M loading. In the drawing, 1 is a video cassette 1-1, 1a is a receiving port, 2 is a magnetic tape, 3 is a rotary head drum, 8.9 is a flange roller, 10.11, 24, 25 are inclined rollers, 20 is a chassis, 21 is a It is slide based.

Claims (1)

[Claims] With the video cassette installed in a magnetic tape recording/reproducing device, the magnetic tape stored in the video cassette is wound around a rotating head drum to which a magnetic head is attached at a predetermined lead angle. The loading device includes roller guide means for causing a guide roller to enter the video cassette when the video cassette is housed, and a roller guide means for sliding the rotary head drum into the video cassette so as to press the magnetic tape against the guide roller. 1. A magnetic tape loading device comprising: a slide means for sliding the magnetic tape;