JPS62150549A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the running stability of a tape by providing an adjusting section to adjust the position around the center shaft of a fixed upper cylinder incorporated with a rotary magnetic head device. CONSTITUTION:When tape guide 16 is placed at a position 16' while a fixed upper cylinder 13 is assembled, the interval between a read face 15 and a tape guide 16' is l' and not proper to guide the magnetic tape 2 vertically. Thus, a restriction adjusting jig 29 is used, a fixed upper cylinder 13 is turned in a direction M' to the fixed lower cylinder 14, the interval between the lead face 15 and the tape guide 16 is adjusted to be an optimum interval (l) to guide the magnetic tape 2 vertically. Thus, the running adjustment is facilitated with high accuracy, the tape end has no flaw even for a very thin tape and the fluctuation of the track bending due to the tape width accuracy is suppressed and the stable running of tape around the cylinder is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to regulating the tape width direction around the cylinder of a magnetic recording/reproducing device, and particularly to a structure suitable for stable tape running around the cylinder.

[Background of the invention]

In conventional devices, the tape running position around the cylinder is restricted by using the elasticity of the linear member to control the tape running position around the lead surface, as described in Utility Model Publication No. 53-35445. A pressing member was brought into contact with the edge of the tape to press the tape against the lead surface for regulation. However, when running ultra-thin tape, the pressing force is 1 to 2 g, but it is very difficult to adjust the variation to about 1 g, and repeated running may cause slight damage to the part of the tape in contact with the pressing member. , cannot be avoided and stable driving is hindered. Therefore, stable running of low-rigid tape requires issues such as preventing damage to the tape, precision of linear parts, and managing pressing force.
Not suitable.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a mechanism that can adjust the distance between a lead surface that regulates the lower edge of the tape and a guide portion that regulates the upper edge of the tape to an optimal regulation interval in a magnetic tape winding device around a cylinder. An object of the present invention is to provide a magnetic recording and reproducing device that can improve the running stability of the tape by guiding and regulating the tape in the width direction.

[Summary of the invention]

In the present invention, when the magnetic tape is run around the cylinder, the lower edge of the tape, which tends to move up and down in the tape width direction due to the high speed rotation of the rotary cylinder, is first restrained within the dormitory by the lead surface of the fixed lower cylinder. The upper end of the tape is guided and regulated by the tape guide section of the fixed upper cylinder, which is adjusted to the optimum regulation interval with respect to the lead surface of the cylinder.The tape is sandwiched from above and below at the optimum interval and guided and regulated, suppressing vertical movement of the tape and tracking. This is intended to improve tracing.

[Embodiments of the invention]

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

1 and 2 are sectional views of main parts showing the operation of the adjustment section of the embodiment according to the present invention, including the fixed upper cylinder 1, the shaft 17, and the like. Screw hole 30. Spring holder 32. Adjustment screw 3
3. Regulation adjustment jig 29. Spring 35. It is composed of a holding pin 362 and a positioning surface 42.

FIG. 3 is a perspective view showing a state in which a tape is wound around the cylinder of the present invention. Cylinder 1 is a fixed upper cylinder 13
and a fixed lower cylinder 14.
A lead surface 15 is provided in a spiral shape for running the lower end of the magnetic tape 2 along it. The fixed upper cylinder 13 is also provided with a tape guide section 16 that presses the upper edge of the magnetic tape 2 against the lead surface 15 (
In one embodiment of the present invention, the tape guide portion 16 has a spiral shape parallel to the lead surface 15, but the magnetic tape 2
The tape guide section 16 can be formed by forming the fixed upper cylinder 13 into a cylinder assembly, even if the guide section is not limited to the entire circumference of the winding line, but can be locally pressed against the lead surface 15 using an elastic member. If the current position is 16', the distance between the lead surface 15 and the tape guide part 16' is 1', and the distance between the lead surface 15 and the tape guide part 16' is 1'.
Inappropriate spacing. Therefore, by rotating the fixed upper II interface 13 in the M' (7) direction about the shaft 17 with respect to the fixed lower cylinder 14 using the regulation adjustment jig 29 or the like, the lead surface 15 and the tape guide section can be adjusted. 16
The magnetic tape 2 is regulated and guided from above and below so that the interval between the two is set to the optimum interval 1. (The optimal interval 1 is
It is slightly narrower than the width of the magnetic tape 2. ) The post-adjustment regulation adjustment jig 29 can be removed.

In FIG. 1, the adjustment screw 6 is rotated by the adjustment screw 33.
3 moves in the B direction. At that point, the spring holder 32 is fixed to the regulation adjustment jig 29, and since the regulation adjustment jig 29 is fixed to the shaft 17 (shown in FIG. 3), the repulsive force of the spring 35 causes the holding bin to 36 is always in pressure contact with the positioning surface 42. Therefore, the adjusting screw 33 is also always in pressure contact with the positioning surface 42. As a result, the screw 33
In response to the movement in the B direction, the fixed upper cylinder 13 rotates in the M direction about the shaft 17 with respect to the fixed lower cylinder 14 (shown in FIG. 3).

Fig. 2M shows the operation results when the distance is 1' as shown in Fig. 2M. In order to adjust the interval 1' to the optimum interval 1, the fixed upper cylinder 13 must rotate in the M' direction with respect to the fixed lower cylinder 14, and for this purpose the adjusting screw
’ direction. At that time, as explained in FIG.
It is in pressure contact with 2. After adjusting the optimum spacing 1 shown in FIG. 3, the fixed upper cylinder 13 is fixed to the shaft 17 through the screw hole 30.

FIG. 4 is a sectional view taken along the D-line of the top-fixed type cylinder structure shown in FIG. 3 as a main part of an embodiment of the present invention. Cylinder 14, rotating cylinder 21, stator transformer 18, rotary transformer 19, preload jig 22, transformer support plate 20, disk 24, bearing 25, magnet 26, coil 27, soft 7 elite 2B, f
It is composed of a fl control adjustment jig 29 and an adjustment screw 33. A plurality of magnetic heads 23 are attached to the rotating cylinder 21 and record and reproduce signals on a magnetic tape. 31 is a screw hole for fixing the regulation adjustment jig 29 to the shaft 17; , is press-fitted into the fixed lower cylinder 14. The screw hole 30 is used to fix the fixed upper cylinder 13 to the shaft 17 after adjusting it to the optimum interval 1 shown in FIG. 1 using the regulation adjustment jig 29 or the like. The bearing 25 supports the rotation of the rotating cylinder 21 smoothly. As explained using FIGS. 1 to 3, the gap length between the stator transformer 18 and the rotary transformer 19 does not change even if the fixed upper cylinder 13 is rotated by adjusting the distance between the lead surface and the tape guide section.

FIG. 5 is a plan view showing an example of a magnetic recording and reproducing apparatus (VTR) using such a cylinder, in which 1 is a cylinder on which a video head is placed and performs recording and reproducing, 2 is a magnetic tape, and 3 is a cylinder in which a video head is placed for recording and reproducing.
, 4 is the tape drawing member on the outgoing side, 5 is the CTL head,
6 is a capstan, 7 is a pinch roller, 8.9 is,
Supply and take-up reel stands 10 and 11 are supply and take-up reels, and 12 is a cassette. Cassette 1 in stop mode
Tape quotation member 3 on the outflow side stored in the cutout of 2
．． 4, the tape 2 in the cassette 12 is pulled out in a state where it is wound approximately 1800 times around the cylinder 1 by the loading operation in the direction (A), and held as shown in FIG. Perform recording/playback to 2.

6 and 7 are cross-sectional views showing the operation of the interval 1 adjustment section of the upper fixed type cylinder according to another embodiment of the present invention shown in FIG. 8. 41 is a positioning bottle, and screw 40
As a result, the positioning member 38 is attached to the fixed upper cylinder 13,
Fix accurately. (As mentioned above, the fixed upper cylinder 1
3 and the positioning member 38 are integrally molded, the positioning pin 41 and the screw 40 are unnecessary. ) optimal interval FJI1
The adjustment operation No. 1 is the same as that shown in FIGS. 1 and 2, but is performed near the outer periphery of the cylinder. A detailed explanation of the operation of the embodiment shown in FIGS. 6 to 8 will be omitted since it is the same as that in FIGS. 1 to 6.

9 and 10 are cross-sectional views showing the operation of the interval 1 adjustment section of the upper fixed cylinder according to still another embodiment of the present invention shown in FIG. Upper cylinder 13, shaft 17, screw hole 30. spring holder 32,
It is composed of an adjustment screw 36, a regulation adjustment jig 29, a spring 35, a holding bottle 66, and a positioning surface 42, but in contrast to FIGS. They differ in some respects.

In FIG. 9, the adjustment screw 3 is rotated by the adjustment screw 33.
3 moves in the C direction. At that point, the spring holder 32 is fixed to the regulation adjustment jig 29, and since the regulation adjustment jig 29 is fixed to the shaft 17 (shown in FIG. 11), the repulsive force of the spring 35 causes the holding pin 66 to is always in contact with the positioning surface 42. Therefore, the adjusting screw 33 is also always in pressure contact with the positioning member 42. As a result, in response to the movement of the adjustment screw in the C direction, the fixed upper cylinder 13 moves around the shaft 17 and the fixed lower cylinder 14 (shown in FIG. 11).
, it rotates in the M direction.

FIG. 11 is a perspective view of the cylinder of the present invention. The configuration of the cylinder is the same as that in FIG. 3, so it is omitted. FIG. Show the results. In order to adjust the interval 1' to the optimum interval 1, the fixed upper cylinder 13 must be rotated in the M' direction with respect to the fixed lower cylinder 14, and for this purpose the adjusting screw is moved in the C' direction. At this time, as explained in FIG. 1, the holding pin 36 and the adjusting screw 33 are in pressure contact with the positioning surface 42 as shown. After adjusting the optimum spacing shown in FIG. 11, the fixed upper cylinder 13 is fixed to the shaft 17 through the screw holes 30.

FIGS. 12 and 13 are cross-sectional views showing the operation of the interval 1 adjustment section of the upper fixed type cylinder according to still another embodiment of the present invention shown in FIG. 14. Reference numeral 41 denotes a positioning pin, and the positioning portion 3 is attached to the fixed upper cylinder 13 by means of a screw 40.
8 is precisely fixed. (As mentioned above, if the fixed upper cylinder 13 and the positioning member 3 are integrally molded,
Positioning bin 41. Screw 40 is unnecessary. ) The adjustment operation for the optimum interval 1 is the same as that shown in FIGS. 9 to 11, but is performed near the outer periphery of the cylinder. A detailed explanation of the operation regarding FIGS. 12 to 14 is as follows.
Since it is the same as in Figures 1 to 3, it will be omitted.

〔Effect of the invention〕

According to the present invention, since the tape can be guided and regulated from above and below in the width direction around the cylinder, there is no need for a width direction regulation guide on the cylinder entry/exit side, and there is no need to apply an unreasonable load in the width direction of the tape around the cylinder. It is easy to adjust the lead surface of the fixed lower cylinder and the tape guide part of the fixed upper cylinder to the optimum spacing without causing any damage, and it is possible to regulate the guide in the mounted state.
Even with ultra-thin tape, it won't damage the tape edges.
Furthermore, fluctuations in track bending due to tape width accuracy are also suppressed, and the tape can run stably around the cylinder.

[Brief explanation of drawings]

1 and 2 are sectional views showing essential parts of one embodiment of the present invention, FIG. 6 is a perspective view of one embodiment, and FIG. 4 is a sectional view taken along line D-Dm in FIG. Is Figure 5 a model according to the present invention? 6 and 7 are cross-sectional views showing essential parts of another embodiment of the present invention. FIG. 8 is a perspective view of this cylinder. 10 are cross-sectional views showing essential parts of still another embodiment of the present invention, FIG. 11 is a perspective view of this conductor, FIG.
FIG. 6 is a sectional view showing a main part of still another embodiment of the present invention, and FIG. 14 is a perspective view of the cylinder. 13... Fixed upper cylinder, 14... Fixed lower cylinder, 21... Rotating cylinder, 23... Magnetic head, 1
5... Lead surface, 16... Tape guide section, 29...
...Regulation adjustment pond 42...Positioning surface. Representative Patent Attorney Masaru Ogawa Otoko 1 Figure 3 Hiage Section 4 1 ゛ 5 (! 1 6 points 7 Figures 9 z 12 countries to hide / 311

Claims (1)

[Claims] In a rotating magnetic head device having a fixed lower cylinder having a guide part for guiding the lower edge of the magnetic tape, and a fixed upper cylinder having a guide part for guiding the upper edge of the magnetic tape, 1. A magnetic recording and reproducing device characterized in that an adjusting section for adjusting the position of the rotating magnetic head device is provided integrally with the rotating magnetic head device.