JPS582425B2 - magnetic recording and reproducing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording and reproducing apparatus that automatically mounts a magnetic tape on a magnetic tape guide having a rotating magnetic head therein, and records and reproduces signals thereon. .

In recent years, with the development of home video tape recorders, magnetic recording and playback systems have been developed in which signals are recorded and played back by diagonally attaching a magnetic tape to a magnetic tape guide containing a rotating magnetic head. Various devices have been proposed.

In this type of magnetic recording and reproducing apparatus, it is necessary to mount the magnetic tape on the circumferential surface of the magnetic tape guide over more than half the circumference thereof.

Since this magnetic tape mounting operation is extremely troublesome and requires high precision, automation of the mounting operation is progressing.

In order to achieve automation of this magnetic tape loading operation, conventionally the magnetic tape pull-out member is operated by a structure of pure links or by the rotation of a rotating disk disposed below the magnetic tape guide. The format is adopted.

However, since the former type has a link configuration, its mechanical precision greatly affects the magnetic tape mounting operation, making it impossible to mount the magnetic tape on the magnetic tape guide with high precision, and requiring a large number of component parts. There was a drawback.

Furthermore, in the latter type, a rotating disk or annular body for operating the magnetic tape pull-out member having a diameter smaller than that of the magnetic tape guide is used, which increases the size of the entire apparatus and creates dead space.

Further, there is a drawback that the mechanism for rotating the rotating disk or the ring body becomes complicated and the number of parts increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording and reproducing apparatus that has high reliability in magnetic tape mounting operation and has a simple configuration.

The present invention is characterized by a rotating magnetic head device in which a magnetic tape is attached to a magnetic tape guide having a rotating magnetic head therein, and signals are recorded and reproduced thereon; and a guide base. A pair of magnetic tape drawers that pull out the magnetic tape located in front of the magnetic tape guide toward the left and right positions of the magnetic tape guide by moving along the guide groove, and move the magnetic tape to a position where it is aligned with the magnetic tape guide. a guide means, a chain member connected to and moved by the magnetic tape drawer guide means under the lower surface of the guide base of the magnetic tape drawer guide means, a means for winding and feeding out the chain member, and an end of the chain member. and a guide member for guiding the chain point, and the magnetic tape draw-out guide means is operated by winding up the chain member by the means for winding and unwinding the chain member.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a magnetic tape running system in a magnetic recording and reproducing apparatus of the present invention. In the figure, 1 is a magnetic tape guide, and this magnetic tape guide 1 has two rotating magnetic heads (not shown). ) are mounted facing each other with a phase of 180°.

The rotating magnetic head and the magnetic tape guide constitute a rotating magnetic head device.

Reference numeral 2 denotes a cassette, and the cassette 2 is equipped with a tape feed reel and a take-up reel, and a magnetic tape 3 is wound around these reels.

Reference numerals 4 and 4' designate magnetic tape pull-out guide means for pulling out the magnetic tape 3 from the cassette 2 and placing it along the magnetic tape guide 1 as shown by the two-dot chain line in FIG.

The magnetic tape drawer guide stages 4, 4' each have guide rollers 4a, 4a' and inclined posts 4b, 4b'.

The magnetic tape drawer guide means 4, 4' are located inside the cassette 2 as shown by solid lines in FIG. 1 when the cassette is loaded, but when the operator presses a recording or playback button (not shown). and the guide grooves 6, 6' of the guide base 5.
The magnetic tape 3 is pulled out from the inside of the cassette 2 by moving along the guide base 5 in the directions of the arrows.

Then, the magnetic tape pull-out guide means 4, 4' move until they come into contact with the positioning members 7, 7', respectively, as shown by the two-dot chain lines, and then stop.

This allows the magnetic tape 3 to be placed along the magnetic tape guide 1.

A mechanism for moving the magnetic tape drawer guide stages 4, 4' as described above will be explained with reference to FIGS. 2 and 3.

In these figures, the same reference numerals as in FIG. 1 indicate the same parts.

Before describing the moving mechanism of the magnetic tape drawer guide means 4, 4' in detail, the connection structure between the magnetic tape drawer guide means 4, 4' and the guide base 5 will be explained. As shown in FIG. 2, it has protrusions 4c and 4c' that protrude downward.

These protrusions 4c, 4c' are slidably fitted into guide grooves 6, 6' of the guide base 5, respectively.

The guide base 5 is attached to the base base 8 via a spacer.

A drive mechanism for magnetic tape drawer guide means 4, 4', which will be described below, is arranged between the guide base 5 and the base base 8.

This drive mechanism will be described mainly with reference to FIG.

A worm 9 is disposed near the center of the magnetic tape guide 1 on the opposite side of the magnetic tape guide 1, that is, at the rear position, so as to face the front position of the magnetic tape guide 1.

This worm 9 is rotatably attached to the base 8 by a bearing 10.

A pulley 12 is attached to the shaft of the worm 9 and is connected to a motor (not shown) via a belt 11.

A pair of worm gears 13, 13' mesh with this worm 9.

These worm gears 13, 13' are arranged on the left and right sides with respect to the worm axis at the rear position of the magnetic tape guide 1, and are supported by the guide base 5 and the base base 8 as shown in FIG.

Each worm gear 13, 13' is provided with a long hole 14, 14', a spring guide groove 15, 15', and a spring retaining pin 16, 16'.

The worm gear 13.13' is made of a lightweight material, for example plastic.

Chain member 1 connected to the above-mentioned worm gear 13, 13'
7.17' are the two pins 18, 19 respectively in this example.
, 18', 19'.

The end of the link member 22.22' on the magnetic tape side of the chain member 17.17' is connected to the magnetic tape pull-out guide means 4, 4' by a pin 23.23' provided therein as shown in FIG. are connected to the protrusions 4c and 4c'.

Further, the end of the link member 20.20' on the worm gear side of the chain member 17.17' is connected to a pin 24.24' which is provided thereon and engages with the elongated hole 14, 14' of the worm gear 13, 13'. is connected to the worm gears 13, 13' by.

The pin 24.24' and the spring locking pins 16, 16' on the worm gear 13.13' each have a spring guide groove 1.
Along 5.15' a spring 25.25' is arranged.

These springs 25 and 25' are the magnetic tape drawer guide means 4.
, 4' are used to absorb the excessive pulling out of the magnetic tape 3 by the springs 25, 4', and these springs 25, 25' are provided with pins 24, 24' that come into contact with one end of the elongated holes 14, 14' when installed. An initial tensile force is applied.

The base base 8 is provided with a guide member 26.26' for guiding the pins 18, 19, 23.18', 19', 23' of the chain member 17.17'.

These guide members 26 and 26' are inserted from below the cassette 2 loaded in the front position of the magnetic tape guide 1, respectively.
It passes along the side of the magnetic tape guide 1 and reaches the lower part of the worm gears 13, 13' at the rear position thereof, and the lower part of the worm gears 13', 13' is provided with the center of the worm gears 13, 13', respectively. They are formed in an arc shape with almost the same center.

By configuring the worm gears 13, 13' in the guide members 26, 26' in an arc shape in this way, the link members 20, 21, 20' forming the chain member 17, 17', 21' can be rolled up and guided as shown in FIG.

Next, the operation of an example of the apparatus of the present invention described above will be explained.

As shown in FIG. 1, the magnetic tape drawer guide means 4,
The cassette 2 is loaded with the magnetic tape guides 4' located in front of the magnetic tape guide 1.

Next, when the operator presses a recording or playback button (not shown), the worm 9 rotates in the direction of the arrow via the motor, belt 11 and pulley 12, so the worm gear 13 rotates clockwise and the worm gear 13 rotates clockwise. 13' rotates counterclockwise.

Therefore, the chain members 17, 17' move toward the magnetic tape guide 1 via the springs 25, 25' and the pins 24, 24'.

At this time, the pins 18, 19, 2 of the chain member 17, 17'
3 and 1B', 19', and 23' are guide members 2, respectively.
6.26' so that the chain member 17.1
7' is smoothly guided by guide members 26, 26'.

As a result, the magnetic tape drawer guide stages 4 and 4' are moved by the guide grooves 6 and 6' of the guide base 5 by the chain members 17 and 17'.
The magnetic tape 3 is pulled out from the inside of the cassette 2 by moving on the guide base 5 along the respective directions.

Thereafter, as the chain members 17 and 17' continue to move, the magnetic tape drawer guide means 4 and 4' move until they come into contact with the respective positioning members 7 and 7' as shown by the two-dot chain line in FIG. 1, and then stop. do.

This state is detected by, for example, a microswitch and the current to the motor is cut off, but the details are not directly related to the present invention and will not be explained here.

At this time, the link members 20, 2 of the chain member 17, 17'
1, 20', 21' are guide members 26 as shown in FIG.
, 26' and wound around the lower surface of the worm gears 13, 13'.

By the above-described operation, the magnetic tape 3 is automatically placed around the magnetic tape guide 1 over a range of at least 180°.

If the magnetic tape 3 is to be stored in the cassette 2 from the above-described state, the worm 9 may be rotated in the opposite direction to that described above.

As described in detail above, the present invention allows the magnetic tape draw-out guide means to be moved by the configuration of the chain member winding and unwinding means disposed at the rear position of the magnetic tape guide member and the chain member moved thereby. Therefore, the magnetic tape can be reliably aligned with the magnetic tape guide of the rotating magnetic head device.

Further, according to the apparatus of the present invention, the structure related to the magnetic tape mounting operation is not only simple, but also has a small number of component parts, which has the advantage that the cost of the apparatus can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of the magnetic tape running system of the magnetic recording and reproducing apparatus of the present invention, FIG. FIG. 4 is a plan view showing an example of the drive mechanism of the tape drawer guide means, and FIG. 4 is a plan view for explaining its operation. 1...Magnetic tape guide, 2...Cassette, 3...Magnetic tape, 4.4'...
・Magnetic tape drawer guide means, 9...worm,
13, 13'...--uh;-m gear, 17, 17
'... Chain member, 26, 26'... Guide member.

Claims (1)

[Scope of Claims] 1. A rotating magnetic head device configured to attach a magnetic tape to a magnetic tape guide body incorporating a rotating magnetic head, and record and reproduce signals on the magnetic tape guide body, and a guide groove of a guide base. a pair of magnetic tape drawer guide means for pulling out the magnetic tape located in front of the magnetic tape guide toward the left and right positions of the magnetic tape guide by moving along the magnetic tape guide, and moving the magnetic tape to a position where it is aligned with the magnetic tape guide; a chain member connected to the magnetic tape drawer guide means to move it under the lower surface of the guide base of the magnetic tape drawer guide means; a means for winding in and feeding out the chain member; an end portion of the chain member; A magnetic recording and reproducing device comprising a guide member for guiding a chain point, and a magnetic tape draw-out guide means is operated by winding the chain member by the means for winding in and feeding out the chain member. Device. 2. The chain member is composed of a plurality of link members connected together by a pivot, one end of which is connected to the winding and feeding means for the chain member, and the other end being connected to the magnetic tape draw-out guide means. A magnetic recording and reproducing device according to claim 1. 3. The winding and feeding means for the chain member is configured to engage a worm which is disposed at a rear position of the magnetic tape guide toward a front position of the magnetic tape guide and near the center of the magnetic tape guide. 2. The magnetic recording and reproducing device according to claim 1, comprising a pair of worm gears arranged on the left and right sides of the worm axis and connecting one end of a chain member. 4. The connecting part between the chain member and the worm gear consists of a circular arc groove provided on the worm gear, a connecting pin at the end of the chain member that is engaged with this circular groove, a spring latching pin provided on the worm gear, and a link between these pins. 4. The magnetic recording and reproducing apparatus according to claim 3, further comprising a spring arranged to absorb excessive pulling out of the magnetic tape.