JPS6141127Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a support device for a magnetic head in a magnetic recording/reproducing device, and the present invention relates to a support device for a magnetic head in a magnetic recording/reproducing device. The structure is such that the direction can be easily adjusted.

2. Description of the Related Art Conventionally, devices shown in FIGS. 1 and 2 have been considered as devices for holding a magnetic head so that the width direction (height) of the magnetic tape and the inclination angle of the head gap can be adjusted.

That is, the magnetic head 2 is fixed on an L-shaped support substrate 1, and this support substrate 1 is supported by a spring 3, respectively.
It is supported on the substrate 7 by adjustment screws 4, 5, and 6 via.

Therefore, when adjusting in the height direction, it can be done by rotating the adjusting screw 4, but if adjustment is made only with this adjusting screw 4,
The magnetic head 2 tilts in the front-rear direction, and the state of contact between the magnetic tape and the front surface of the head changes.

Therefore, it is necessary to adjust the rotation of the adjusting screws 4, 5, and 6 by the same amount, and it is difficult to adjust the adjusting screws 4, 5, and 6 so that the respective heads do not tilt.

Further, when adjusting the inclination angle of the head gap after adjusting the height, it is done by rotating the adjusting screw 6. When the supporting board 1 is tilted by the adjusting screw 6, as shown in FIG. The position of the head gap 2' of the magnetic head 2 in the height direction is Δ
It will change by x.

Therefore, in order to adjust the height and inclination to predetermined positions, it is necessary to repeat each adjustment alternately, which is difficult.

Furthermore, in a magnetic recording/reproducing device (VTR), the distance from the video signal recording position by the rotary head to the audio signal recording position by the audio head is determined, and if this distance deviates, the screen and audio will be out of sync during compatible playback. Conventional VTRs had a fast tape running speed, and even if there was a slight positional deviation, the value was small in terms of time, so it was sufficient to position the tape with machining accuracy, but recently VTRs have become more densely recorded. Because the tape speed has become extremely slow, the conventional configuration (processing accuracy only) will result in a large discrepancy between the screen and the audio, and it will also be necessary to adjust the position in the tape running direction.

The present invention is constructed so that adjustment in these three directions can be easily performed, and one embodiment thereof will be described below with reference to the drawings.

In FIGS. 4 and 5, 11 is a substrate 12.
13 is a rotation regulating plate provided on the holding post 11 so as to be rotatable and to fix its rotational position with a tightening screw 14 when necessary. be.

Reference numeral 15 denotes a substantially cylindrical mounting boss provided on the holding post 11 so as to be rotatable and slidable in the vertical direction. It is pressed downward by an adjustment screw 17 provided at the upper end of the post 11.

Further, the mounting boss 15 is configured such that its vertical and rotational positions are fixed by a tightening screw 18 when necessary.

Further, a guide pin 19 implanted at the lower end of the mounting boss 15 is engaged with an engagement hole 20 provided in the rotation regulating plate 13 so as to be slidable in the vertical direction.

Reference numeral 21 denotes a head base plate to which the magnetic head 2 is fixed, and is mounted on the mounting boss 15 so as to be rotatable about a mounting nut 22.

23 and 24 are spring hanging bodies provided on the mounting boss 15 and the head base plate 21, respectively;
A spring 25 is hung between the spring hooks 23 and 24, and urges the head base plate 21 to rotate in the direction of the arrow about the mounting nut 22. Reference numeral 26 denotes an adjustment screw which is screwed into a protrusion 27 provided on the mounting boss 15, one end of which comes into contact with the head base plate 21, and adjusts the rotational position of the head base plate 21.

Numeral 28 is a tightening fixing screw for fixing the rotational position of the head base plate 21.

Next, this adjustment operation will be explained.

First, the relative position between the magnetic head 2 and the video head (not shown), which is performed for positioning in the tape running direction, is measured by measuring the turns recorded on the magnetic tape (for example, by developing the recording tape and using a microscope). measurement) or by means such as playing back a standard tape recorded in accordance with the specifications. This necessary adjustment of the relative position between the video head and the magnetic head 2 is achieved by rotating the rotation regulating plate 13 around the holding post 11, and then moving the guide pin 1 of the mounting boss 15.
9 is fitted into the guide hole 20 of the rotation restriction plate 13, so the mounting boss 15 rotates together with the rotation restriction plate 13. In this way, the position of the magnetic head 2 in the tape running direction is adjusted to a predetermined position. After adjustment, the rotation regulating plate 13 is locked to the holding post 11 using the lock screw 14. This rotation regulating plate 13
This lock also restricts the rotational position of the mounting boss 15. Next, for adjustment in the height direction, the mounting boss 15 is moved up and down along the holding post 11 using the adjustment screw 17. At this time, the guide pin 19 implanted in the mounting boss 15 moves along the guide hole 20 on the rotation regulating plate 13 fixed to the holding post 11, so that the previously adjusted position changes in the tape running direction. does not occur. After adjusting the height, fix the mounting boss 15 to the holding post 11 with the lock screw 18. Finally, adjust the azimuth. Since the biasing spring 25 applies a rotational force to the head base plate 21 with the mounting nut 22 as the center of rotation, the adjustment screw 26
This makes it possible to adjust the predetermined azimuth. By setting the height of the center of the mounting nut 22 above the head base to be the same as the center height of the head gap portion 2' (head track center height) of the magnetic head 2, the above tape running will not occur even if the azimuth is adjusted. The adjustment position in the direction and tape width direction remains unchanged.

As described above, according to the present invention, the tape running direction, tape width direction, and head gap inclination direction (azimuth adjustment) can be sequentially adjusted without changing the previously adjusted head position. This makes the adjustment work easier.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an example of a conventional head mounting device, Fig. 2 is a front view of the same, Fig. 3 is a front view showing the operation during adjustment, and Fig. 4 shows an embodiment of the present invention. The plan view and FIG. 5 are sectional views on the same side. 2...Magnetic head, 2'...Head gap,
11... Holding post, 12... Device board, 13...
...Rotation regulating plate, 14, 18, 28...Tightening screw,
15...Mounting boss, 16...Spring, 17...Adjustment screw, 19...Guide pin, 20...Engagement hole, 2
1...Head base plate, 22...Mounting nut.

Claims (1)

[Scope of utility model registration request] Holding post 11 implanted on device board 12
a rotation regulating plate 13 rotatably provided on the holding post 11; a first fixing means 14 for fixing the rotational position of the rotation regulating plate 13 when necessary; and a rotation regulating plate 13 rotatably provided on the holding post 11. and holding post 1
Mounting boss 15 slidably provided in the axial direction of 1
, an adjusting means 17 for moving and adjusting the mounting boss 15 in the axial direction of the holding post 11 , a second fixing means 18 for fixing the mounting boss 15 to the holding post 11 when necessary, and the mounting boss 15 . The rotation regulating plate 13 is rotated integrally in the rotation direction,
In the axial direction of the holding post 11, there are connecting means 19 and 20 which are movably connected independently, a head base plate 21 which is rotatably provided on the mounting boss 11 about a rotation shaft 22, and The magnetic head 2 is fixed to the head base plate 21, and the third fixing means 28 fixes the rotational position of the head base plate 21 when necessary.
A magnetic head support device characterized in that the center of the head gap 2' of the magnetic head 2 in the recording track direction is located.