JPH0636489Y2 - Double azimuth head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a double azimuth head used in a magnetic recording / reproducing apparatus, and in particular, two head chips constituting the double azimuth head are mounted on a common head base. The present invention relates to a double azimuth head in which a head base is fixed to a rotating body.

[Outline of device]

According to the present invention, an auxiliary base for separately supporting the head chips is continuously provided at a tip side portion of the head base for attaching the head chips to the rotary drum, and a thick portion is provided on the auxiliary base. A screw hole extending substantially in the radial direction of the rotary drum is formed in the thick portion, and the head base is deformed by abutting the screw screwed in the screw hole with the side surface of the head base. The head supported on the tip of the head is positionally adjusted in the height direction, and the heights of the two head chips constituting the double azimuth head can be adjusted separately after assembly. It is a thing.

[Conventional technology]

Generally, in a VTR, as shown in FIGS. 5 and 6, a magnetic head 2 is attached to a rotary drum 1, and a signal is recorded on a magnetic tape wound around the drum 1 by the magnetic head 2. Alternatively, the signal recorded on the magnetic tape is read. The head chip 2 constituting the magnetic head is attached to the head base 3 shown in FIGS. 7 to 9, and is attached to the projecting piece 5 at the tip of the head base 3. There is. The head base 3 supporting the head chip 2 is attached and fixed to the rotary drum 1 with screws 4.

Furthermore, in a VTR that performs variable speed reproduction, Figs.
As shown in the drawing, two head chips 2 are attached to the projecting piece 5 of the head base 3, and these head chips 2 form a double azimuth head. Incidentally, such a head is actually used in Shokai Sho 60-70916.
This is the same as the magnetic head known from Japanese Patent Publication No.

[Problems to be solved by the invention]

When assembling such a conventional head chip, the two chips 2 are bonded to the head base 3 and
Each head chip 2 has its own winding, followed by 2
It is designed to measure the output characteristics of the two heads for inspection. Therefore, it is necessary to perform winding on each of the two head chips 2 that are extremely close to each other, which makes it difficult to perform the winding work, or takes a long time, and makes automation difficult. Further, when it is determined that one head 2 is defective as a result of further inspection, both head chips must be discarded together, which causes a problem of waste.

Furthermore, in the case of the Ajima spare head, 2 shown in FIG.
The difference between the dimensions a and b from the upper surface of the base 3 of the two heads 2 to the edge of the gap 8, that is, the value of d must be within a predetermined dimension range with an accuracy of several μm. However, the above values of a and b are ± numbers when manufacturing the head chip 2.
Since the variation of 10 μm occurs, the head chip 2 is a
Base 3 by forming a pair by ranking according to the dimensions of b and b
Was to be joined to.

Instead of performing such a rank division, as shown in FIG. 11, a slot 6 and a notch 7 are formed in the head base 3, respectively, and after the drum 1 is mounted, the notch 7 is formed.
The height of the head 2 has also been adjusted by pushing the portion with a adjusting screw. However, the height of the head 2 after being mounted on the drum 1 cannot be adjusted to a very large range because the head 2 is moved, and the dimensional accuracy of d in FIG. There was a drawback that adjustment would not be possible unless it was raised to some extent.

Further, since the head 2 must be mounted at a predetermined position f from the reference surface of the rotary drum 1 shown in FIG. 16,
The heads are classified according to the dimension e of the head chip 2, and
The spacer 9 having the dimension c corresponding to this e is attached to the head base 3
And the reference surface of the rotary drum 1. Therefore, there is a drawback that it takes a lot of man-hours to adjust the height of the magnetic head 2 in the axial direction of the rotary drum 1.

Japanese Unexamined Patent Publication No. 59-144029 discloses a video head assembly in which two head supporting substrates each having one video head adhered and fixed are attached to a pair of common supporting substrates fixed to a rotary drum. The body is disclosed. With such a configuration, it becomes possible to adjust the head support substrate separately with respect to the common support substrate, and when applied to a double azimuth head, the winding work and height adjustment thereof can be easily performed. Become. In addition, it is possible to eliminate the waste of discarding a good-quality video head.

However, according to the above configuration, the number of parts is increased. Further, since the adjusting screw extends in a direction parallel to the axial direction of the rotary drum, it is necessary to form a driver insertion hole in the rotary drum in order to carry out the adjustment, and there is a drawback that the structure of the rotary drum becomes complicated. .

The present invention has been made in view of such problems, and the heights of the individual head chips can be adjusted separately, and the radius can be adjusted without forming an axial driver insertion hole in the rotary drum. It is an object of the present invention to provide a double azimuth head whose height can be adjusted by working from the direction.

[Means for solving problems]

The present invention is a double azimuth head in which two head chips constituting a double azimuth head are attached to a common head base, and the head base is fixed to a rotating body. The head chips are separately supported on the head base. The auxiliary base is continuously provided, a thick portion is formed in the auxiliary base, and a screw hole extending substantially in the radial direction of the rotating body is formed in the thick portion, and a screw screwed into the screw hole is formed. The present invention relates to a double azimuth head characterized in that the auxiliary base is deformed by abutting on the side surface of the head base.

[Action]

The auxiliary base is deformed by rotationally adjusting the screw screwed into the screw hole formed in the thick portion of the auxiliary base from the outer peripheral side in the radial direction of the rotating body by the driver.
Therefore, the position of the head chip supported by the tip of the auxiliary base is adjusted in the height direction.

〔Example〕

 The present invention will be described below with reference to an embodiment shown in the drawings.

3 and 4 show a head base 17 supporting a double azimuth head according to an embodiment of the present invention.
The head base 17 has a pair of auxiliary bases 16 on the tip side thereof.
Are lined up. That is, the auxiliary base 16 is connected to the tip side of the head base 17 through the lateral slot 29 provided in the head base 17. Moreover, the left and right auxiliary bases 16 are partitioned from each other by the vertical slots 28.

Thickened portions 30 are continuously provided on the lower surface of the auxiliary base 16, and these thickened portions 30 are formed with horizontal screw holes 21 extending substantially in the radial direction of a drum 24, which will be described later. Has become. An adjusting screw 22 is inserted into the screw hole 21 as shown in FIGS. 3 and 4.
The tip of the adjusting screw 22 presses the side surface of the head base 17, which is exposed by the lateral slot 29.

As shown in FIG. 1 and FIG. 2, at the tip of the head base 17 in which the auxiliary base 16 is continuously provided at the tip,
The magnetic head 15 is attached by being attached. The head chip 15 is wound, and the characteristics of the head are checked after the winding. After this, as shown in FIGS. 1 and 2, the head chip is provided on the lower surface of the rotary drum 24 facing the outer peripheral side.
The head base 17 is fixed to the lower surface of the rotary drum 24 by a mounting screw 23 so that the head 15 faces.

As described above, the double azimuth head including the pair of head chips 15 according to this embodiment is attached to the tip of the auxiliary base 16 on the tip side of the head base 17, and the head base 17 is attached to the lower surface of the rotary drum 24. It is fixed via screws 23. And head base 17
The height of the head 15 is adjusted by the adjusting screw 22 before the fixing to the rotary drum 24. After this, the tip shape of the magnetic head 15 is adjusted by tape wrap, etc.
The head base 17 is attached to 24. The final fine adjustment of the height of the head chip 15 is performed by rotating the adjusting screw 22 with a driver from the outer peripheral side in the radial direction of the rotary drum 24 after assembly.

As described above, according to the double azimuth head according to the present embodiment, the height of the head chips 15 can be adjusted separately, and fine adjustment can be performed after the head chips 17 are attached to the rotary drum 24 via the head base 17. It will be possible. Moreover, such adjustment can be performed by inserting the driver from the outer circumferential side of the rotary drum 24 in the radial direction, and it is not necessary to form the driver insertion hole in the rotary drum 24 in the axial direction. An auxiliary base that directly supports the head chip 15
Since the 16 is integrally connected to the tip end of the head base 17, it is not necessary to provide an auxiliary base as a separate piece, which makes it possible to prevent an increase in the number of parts.

[Effect of device]

As described above, according to the present invention, the auxiliary base for separately supporting the head chips is continuously provided to the head base, the thick portion is formed in the auxiliary base, and the thick portion has a screw extending substantially in the radial direction of the rotating body. The auxiliary base is deformed by forming holes and bringing screws screwed into these screw holes into contact with the side surfaces of the head base.

Therefore, according to the present invention, the height of each head chip can be adjusted separately by inserting the driver from the outer peripheral side of the rotating body and adjusting the screw screwed into the screw hole of the thick portion. it can. Further, such adjustment can be performed after being incorporated in the rotating body, and fine adjustment in the height direction of the head chip after assembling is possible. Since such adjustment can be performed by the driver from the outer peripheral side in the radial direction of the rotating body, workability is improved and it is not necessary to form a driver insertion hole extending in the axial direction in the rotating body.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a main part of a head drum to which an azimuth head according to an embodiment of the present invention is attached, and FIG. 2 is a bottom view of the same.
FIG. 3 is a plan view of the head base, FIG. 4 is a side view of the same, FIG. 5 is a vertical cross-sectional view of a conventional rotary drum, and FIG. 6 is an enlarged cross-sectional view of essential parts showing attachment of the head base of the head drum. FIG. 7 is a front view of a conventional magnetic head, FIG. 8 is a side view of the same,
FIG. 9 is a plan view of a head base to which a magnetic head is attached,
FIG. 10 is an enlarged front view of the magnetic head, and FIG. 11 is a plan view of the head base with a cut. The names of the main parts in the drawings are as follows. 15 …… Magnetic head (head chip) 16 …… Auxiliary base 17 …… Head base 21 …… Female screw hole 22 …… Adjusting screw 24 …… Rotating drum 28 …… Vertical slot 29 …… Horizontal slot 30 …… Thick section

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yoichiro, 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation (72) Hisato Shima Shima, 7-35, Kita-Shinagawa, Shinagawa-ku, Tokyo In Sony Corporation (56) References JP-A-59-144029 (JP, A)

Claims (1)

[Scope of utility model registration request] 1. A double azimuth head in which two head chips constituting a double azimuth head are attached to a common head base, and the head base is fixed to a rotating body. The head chips are separately supported on the head base. And a thick portion is formed in the auxiliary base, and a screw hole extending substantially in the radial direction of the rotating body is formed in the thick portion, and a screw screwed into the screw hole is formed. A double azimuth head characterized in that the auxiliary base is deformed by contacting the side surface of the head base.