JPS6212948A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce the amount of adjusting and adjust automatically by executing the positional adjustment of a tape path in the direction of the width of a magnetic tape against a rotary cylinder by using a guide part provided integrally a member supporting the rotary cylinder. CONSTITUTION:The supporter part 22 that supports the rotary cylinder 10 in a state slant against a chassis 18, catcher parts 23 to position a tape drawer, and the guide part 30 to position an adjusting jig, are integrally formed with a synthetic resin. And by using the jig positioned by the guide part 30, the position of the tape drawer in the direction of the width of the magnetic tape is adjusted. The pair of catcher parts 23 are provided with a protruding part 26 to demarkate a V-shaped groove 26a, and an arm 27 to demarkate a U-shaped groove 27a respectively. And the recessed 28 is formed under the part 26. The catcher parts 23 are for positioning the tape drawers on the inlet- side and the outlet-side in the three dimensional direction. As a result, the amount of adjusting by means of an adjusting jig 34 can be reduced, and automation is facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic recording and reproducing apparatus, and more particularly, to a magnetic recording and reproducing apparatus suitable for automating the widthwise positional adjustment of a magnetic tape relative to a rotating cylinder.

[Background of the invention]

In general, a helical scan type magnetic recording and reproducing device that uses a tape cassette to record and reproduce signals includes a tape running mechanism that rotates a reel and runs the magnetic tape wound on the reel in a predetermined direction, and a tape drawer. A tape p-loading mechanism is used, which drives a magnetic tape to pull out a magnetic tape from a tape cassette and loads the magnetic tape onto a tape traveling path around a rotating cylinder.The main components of these tape traveling mechanisms and tape loading mechanisms are: The parts are attached to the horizontal surface of the chassis, and the rotating cylinder on which the magnetic head is mounted is attached to the chassis K1 in an inclined state via a cylinder mounting base.

By the way, regarding such a magnetic recording/reproducing device, the Utility Model Publication No. 57-! As described in Japanese Patent No. 51390, it is important for the magnetic head mounted on a rotating cylinder to accurately trace the image signal recorded on the magnetic tape in order to obtain stable playback output, and for this purpose, Adjustment work is done during the assembly process.

Conventionally, such adjustment work has been carried out by using the chassis that fixes the cylinder mounting base as a reference plane, and using an adjustment jig to change the height of the guide roller provided on the tape pull-out body from the chassis. In other words, the height of the magnetic tape relative to the magnetic head was adjusted. However, in order to attach the main components of the tape running mechanism and tape loading mechanism, press punching, actucert, bottle tightening, etc. are performed on the chassis, which tends to cause dimensional errors such as warpage. Since a plurality of members such as a cylinder mounting base are attached, cumulative assembly errors are likely to occur, and therefore the amount of adjustment using the adjustment jig is wide, making automation difficult.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic recording/reproducing apparatus which eliminates the drawbacks of the prior art described above and can automate the positional adjustment of the tape path relative to the rotating cylinder in the width direction of the magnetic tape.

[Summary of the invention]

In order to achieve this object, the present invention includes: a support part that supports the rotary cylinder in an inclined state with respect to the chassis; a catcher part for positioning the tape drawer; !
l A guide part for positioning the adjustment jig is integrally molded of synthetic resin, and the adjustment jig positioned by the guide part is used to adjust the position of the tape drawer in the width direction of the magnetic tape. It is characterized by having the following configuration.

[Embodiments of the invention]

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

1 and 2 are plan views showing the outline of a tape running system of a magnetic recording/reproducing apparatus according to the present invention, with FIG. 1 showing a loading state and FIG. 2 showing an unloading state. In these figures, the magnetic tape is pulled out from a supply reel (not shown) in a tape cassette 2, indicated by a dashed line in FIG. Tensile force pin 5 erasing head 6, impedance roller 7, entrance guide puller 8.
Entrance inclined bin 99 rotating cylinder 10. Outlet inclined bin 11
．． The output guide roller 12° sequentially slides into contact with the audio control head 13, is driven by the pinch roller 14 and the capstan 15, and is stored on a take-up reel (not shown) K in the tape cassette 2.

The entrance guide roller 8 and the entrance inclined bin 9 are placed on the entrance guide block 16 to form an entrance tape drawer,
Further, the outlet inclined bin 11 and the outlet guide roller 12 are placed on an outlet guide block 17 to constitute an outlet tape drawer, and these guide blocks 16 and 17 are connected to a pair of guides formed on the chassis 18. Along the grooves 19 and 20, the first
It is reciprocated between the loading position shown in the figure and the unloading position shown in FIG. In the loading state shown in FIG. 1, the magnetic tape 1 is wound approximately 180 degrees around a rotary cylinder 10 placed on a cylinder mount 21 (described later) by both tape drawers, and is mounted on the rotary cylinder 10. By helically scanning the magnetic tape 1 with a magnetic head (not shown), wideband signals such as video signals are recorded and reproduced.

As is clear from FIG. 3, the cylinder mounting base 21 has a cylindrical support part 22 and a pair of catcher parts 23 located on both sides of the support part 22, which are integrally molded from synthetic resin. There is. The upper surface of the support section 22 is an inclined surface trap, and the inclined surface has two protrusions 24 for positioning the rotating cylinder 10 and three bosses for supporting the rotating cylinder 10 in an inclined state. 25°C is formed.

The upper surfaces of these bosses 25 define one inclined surface as a whole, but since the area of each upper surface is small, it is possible to ensure an extremely large inclined surface.

On the other hand, both catcher parts 23 have an extension part 26 defining a 7-shaped groove 26α and an arm part 27 defining a U-shaped groove 27α.
and a recess 2 below the extension 26.
8 is formed. These catcher parts 23 position the tape drawer bodies on the entry side and the exit side in three-dimensional directions, as will be described later.

Furthermore, as is clear from FIGS. 4 and 5, although it is not shown in FIG. A cylindrical guide portion 30 having a hole 304 is integrally molded.

The cylinder mounting base 21 configured in this way is
As shown in the figure, attach the chassis 1 using a plurality of screws 29.
The rotary cylinder 10 is fixed on the support part 22 of the cylinder mounting base 21 in an inclined state using screws (not shown) that pass through the respective bosses 25.

The positioning operation of the tape drawer in the vicinity of the rotary cylinder 10 is performed in the following 5K steps (note that since the magnetic tape entry and exit sides are functionally almost symmetrical, only the tape entry side will be explained. do). That is, as shown in FIGS. 4 and 5, a protrusion 16α is formed at the tip of the entrance guide block 16, and a positioning protrusion 164 is formed at a predetermined position on the lower surface. Correspondingly, a reference portion 27 is provided protruding from the upper surface of the arm portion 27. In addition, a shaft 31 is fitted and fixed to the entrance guide block 16, and a cylindrical portion 32 is vertically provided thereon. The other end of a link 33 is connected to the portion 32 and has one end connected to a driving means (not shown). The entrance guide block 16 is connected via the link 33 to
It is designed to receive a pressing force in the middle direction in FIG. 4 and in the B direction in FIG. 5, and this is realized by, for example, a known overslider mechanism.

Now, the inlet tape drawer is driven along the guide groove 19 of the chassis 18, and when it reaches the end of the guide groove 19, - the three-dimensional direction of the inlet tape drawer (hereinafter referred to as X, Y, 2
The posture of the surface (as a hail) is determined as follows.

That is, positioning on the X-2 plane is performed by the shaft 31 coming into contact with the 7-shaped groove 26α of the extension portion 26 due to the above-mentioned pressing force, and the protrusion 16α of the entry side guide block 16 being on the upper surface of the recess 28 and the positioning protrusion. This is determined by the portions 167 coming into contact with the reference portions 274 of the arm portions 27, respectively.

Further, positioning within the X-2 plane is achieved by guiding the lower end of the shaft 51 by the U-shaped groove 27α of the arm portion 27, and
This is determined by pressing the upper end of the shaft 31 into the 7-shaped groove 26α. Furthermore, positioning on the X-Y plane is
While the shaft 31 is crimped into the 7-shaped groove 26α,
The cylindrical portion 32 receives the pressing force in the direction of the arrow shown in the figure, and the arm portion 27
It is determined by K that it is pressed against the side surface of.

The above 5Kt, the inlet side (and outlet side) tape drawer is the catcher part 2 integrally molded on the cylinder mounting base 21.
3 allows accurate positioning in three dimensions. On the other hand, as already explained.

The rotating cylinder 10 on which the magnetic head is mounted also stands on the cylinder mount 21 so that it can be mounted with high precision, so that the relative position between the rotating cylinder 10 and the tape drawer can be maintained with high precision.

Next, the position adjustment work of the guide rollers 8 and 12 in the width direction of the magnetic tape will be explained with reference to FIGS. 4 and 5 (also in this case, only the tape entrance side will be explained).

That is, by first inserting the projection 33α of the automatic adjustment device 33 into the insertion hole 304 of the guide portion 30, the horizontal surface (
After positioning in the x-y plane), this adjustment weld 34
is inserted into the adjustment hole 8α at the upper end of the guide roller 8, and the flat surface 33J of the upper projection 33α is aligned with the flat surface 30 of the guide portion 30.
By coming into contact with α, the adjustment jig 34 is positioned in the vertical direction (Z-axis direction). Thereafter, by turning the adjustment jig 34, the guide roller 8 is moved up and down, and the position of the magnetic tape 1 guided by the guide roller 8 with respect to the rotating cylinder 10 is adjusted to obtain the optimum image condition. do.

According to this embodiment, the positioning guide part 30 of the adjustment jig 34 is integrally molded with the cylinder mounting base 21 that supports the rotary cylinder 10, so that the position adjustment of the guide roller 8 in the magnetic tape width direction is easy. It is less susceptible to the dimensional variation K of the chassis 18 as in the conventional case, and therefore the amount of adjustment by the adjustment jig 54 can be reduced, making automation easier.

Note that in the above embodiment, a cylindrical shape having a flat surface SOa and an insertion hole 304 is used as the positioning guide portion 30 of the adjustment jig 34, but the shape of the guide portion 50 is not limited to this. However, other protrusions, recesses, etc. may also be used, and it is clear that the same effect can be obtained by changing the shape of the positioning part of the automatic adjustment device 33 in accordance with these shapes.

[Effect of explosion]

As described above, according to the present invention, the position of the tape bus in the width direction of the magnetic tape relative to the rotating cylinder can be adjusted by using the guide section provided integrally with the member supporting the rotating cylinder. , it is not only possible to reduce the amount of adjustment, but it can also be realized with a simple configuration, and automatic adjustment, which was conventionally considered difficult, is now possible. A magnetic recording/reproducing device can be provided.

[Brief explanation of the drawing]

All of the figures relate to one embodiment of the present invention, and FIGS. 1 and 2 are plan views showing an outline of the tape running system of a magnetic recording/reproducing device, and FIGS.
The figure is an exploded perspective view showing the relationship between the chassis, the rotary cylinder, and the cylinder mounting base, and FIG. 4 shows the tape drawer in contact with the positioning part. A plan view showing the state, and FIG. 5 is a partial cross-sectional side view thereof. 1... Magnetic tape 2... Tape cassette 8.
12... Guide roller 9.11-... Inclined pin 10... Rotating cylinder 16.17... Guide block 18... Chassis 19.20... Guide groove 21
...Cylinder mounting base 22...Support part 23...Catcher part 30...Guide part 30α...Flat surface
504--Insertion hole 31...Shaft 3
5...Automatic adjustment device 33α...Protrusion 3
3k...Flat surface 34...Adjustment jig

Claims (1)

[Claims] A rotating cylinder carrying a magnetic head, a tape cassette containing a magnetic tape wound between two reels, and the magnetic tape being pulled out from the tape cassette and wound around the rotating cylinder within a predetermined angle range. In a magnetic recording and reproducing apparatus, the magnetic recording and reproducing apparatus includes a tape drawer that forms a predetermined tape running path and a driving means that drives the tape drawer, and a support that supports the rotary cylinder in an inclined state with respect to the chassis; A catcher part for positioning the tape drawer and a guide part for positioning the adjustment jig are integrally molded of synthetic resin, and the adjustment jig positioned by the guide part is used to pull out the tape drawer. 1. A magnetic recording and reproducing apparatus characterized in that the position of the body in the width direction of the magnetic tape is adjusted.