JP2908953B2 - Magnetic head unit and magnetic head device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a magnetic head unit and a magnetic head unit.
In particular, the present invention relates to a rotary magnetic head unit and a magnetic head unit used for an auto-reverse type tape deck of an audio cassette and configured to invert a magnetic head by 180 ° between a forward direction and a return direction of a cassette tape.
It relates to a head device .

[0002]

2. Description of the Related Art In general, recording and reproduction of magnetic information are performed by an auto-reverse on a tape deck of an audio cassette. A rotary magnetic head unit is used in which the magnetic head is inverted by 180 ° between the return path and the recording and reproduction conditions on the forward path and the return path of the cassette tape are made equal.

FIGS. 5 to 7 show such a conventional rotary type magnetic head unit. This magnetic head unit 1 has a base plate 2 having a substantially circular shape.
A head insertion opening 3 is formed in the center of the base plate 2. A recording / reproducing head 4 and an erasing head 5 are inserted into the head insertion opening 3 of the base plate 2, respectively. It is fixed to the base plate 2 by an adhesive or the like while being inserted into the opening 3.

A pair of tape guides 6 and 6 for holding one side of the recording / reproducing head 4 and the erasing head 5 are provided on both sides of the head insertion opening 3 of the base plate 2.
Are formed so as to protrude forward.
A locking piece 7 is formed at the inner corner of the front end of each of the recording heads for contacting one end of each of the recording / reproducing head 4 and the erasing head 5. Further, each of the tape guides 6
A guide recess 8 for guiding a magnetic recording medium (not shown) such as a magnetic tape to a predetermined position with respect to each of the heads 4 and 5 is formed on the tip end surface of the head.

[0005] Mounting holes 9 and 9 are formed at positions above and below the head insertion opening 3 of the base plate 2, and a peripheral edge of the mounting hole 9 on the back surface side of the base plate 2. Are formed with positioning recesses (not shown).

As shown in FIG. 7, a mounting jig 10 for mounting the base plate 2 is provided. The mounting jig 10 can be rotated by 180 ° by a driving device (not shown). I have. The mounting jig 10 is formed with a positioning projection 11 that engages with the positioning recess of the mounting hole 9 of the base plate 2 to position the base plate 2. A screw hole 12 communicating with the mounting hole 9 is formed.

When assembling such a conventional magnetic head, first, the heads 4, 5 are inserted into the insertion openings of the base plate 2.
Are inserted so that the leading edges of the heads 4 and 5 come into contact with the locking pieces 7 of the tape guide 6, and in this state, the azimuth adjustment of the heads 4 and 5 is performed.

The azimuth adjustment of each of the heads 4 and 5 needs to be adjusted so that the mounting angle of each of the heads 4 and 5 is at an appropriate position while the base plate 2 is mounted on a mounting jig 10. Since the mounting position of the base plate 2 is determined according to the positioning protrusion 11 of the mounting jig 10, the mounting plate 2 has a positioning recess corresponding to the positioning protrusion 11 of the mounting jig 10. The azimuth adjustment of each of the heads 4 and 5 is performed with reference to the space at the center of one mounting hole 9.

On the other hand, the positions of the heads 4 and 5 are adjusted so that the gaps thereof are at predetermined positions with respect to the magnetic tape to be guided by the guide recesses 8 of the base plate 2. For example, one side surface of the recording / reproducing head 4 is fixed to a side surface of the insertion opening 3 of the base plate 2 by a jig (not shown) or the like, and in this state, each head 4 is fixed with an adhesive or the like. , 5 are fixed to the base plate 2.

Then, by the above-described steps, each of the heads 4, 5
After the azimuth adjustment and fixing to the base plate 2 are completed, the positioning recess of the mounting hole 9 of the base plate 2 is
The base plate 2 is positioned by engaging with the positioning projections 11 of the mounting jig 10.
Into the base plate 2 by screwing a screw (not shown)
Is fixed to the mounting jig 10.

[0011]

However, in the conventional magnetic head unit 1, when the azimuth of each of the heads 4 and 5 is adjusted with respect to the base plate 2, one of the mounting holes 9 in the base plate 2 is used. , The positioning criterion for azimuth adjustment becomes extremely ambiguous, and it is necessary to perform the adjustment while assuming the positioning criterion existing in the space of the mounting hole 9. Azimuth adjustment of heads 4 and 5 cannot be performed accurately,
There is a problem that the azimuth accuracy is reduced and the azimuth adjustment operation is extremely difficult.

The present invention has been made in view of the above points, and has a magnetic head unit and a magnetic head device capable of accurately and easily adjusting the azimuth of a head.
It is intended to provide a device.

[0013]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
In the magnetic head unit according to the first aspect of the present invention , a head insertion opening is formed in a central portion of the base plate, and a magnetic head is fixed inside the head insertion opening of the base plate. In a magnetic head unit mounted on a mounting jig that is rotated 180 ° between a forward path and a return path of a magnetic recording medium, a positioning reference portion for adjusting azimuth of each head is formed on the base plate. Is what you do.

According to a second aspect of the present invention, there is provided an electronic apparatus comprising:
A head insertion opening is formed in the center, and
The magnetic head is fixed inside the head insertion opening of
180 ° reversal operation of the base plate between the outward path and the return path of the magnetic recording medium
The magnetic head unit attached to the mounting jig
A plane parallel to the running direction of the magnetic recording medium on the base plate.
A notch having a
You.

A magnetic head device according to claim 3.
Is a magnetic head unit according to claim 1, wherein
The positioning reference part and the positioning formed on the mounting jig
By hitting the projection, the magnetic head unit
It is characterized by being attached.

[0016]

According to the magnetic head unit of the first aspect of the present invention , the azimuth adjustment is performed by adjusting the angular position of each head with reference to the reference portion of the base plate. In this way, it is not necessary to adjust the azimuth based on the assumed reference position in the internal space of the mounting hole, and the reference position for positioning when adjusting the azimuth of the head can be easily defined. The adjustment can be performed, and the azimuth adjustment operation of the head can be easily performed.

According to the second aspect of the present invention, each head
Angle position of the magnetic recording medium running on the base plate
Adjustment with reference to a notch having a plane parallel to
As the azimuth adjustment is performed by
As before, based on the assumed reference position of the internal space of the mounting hole
It is not necessary to adjust azimuth as needed
Easily define the reference position for positioning when adjusting
Azimuth adjustment that is extremely accurate and precise.
Head adjustment work.
It can be done easily.

According to the third aspect of the present invention, a magnetic head is provided.
Formed on the positioning reference part of the base plate of the
The magnetic head unit
The magnetic head device can be configured by attaching
Azimuth adjustment is complete
Position the base plate properly and attach it to the mounting jig.
You can do it.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows an embodiment of a magnetic head unit according to the present invention. A head insertion opening 3 is formed in the center of a base plate 2 of a magnetic head unit 1. A recording / reproducing head 4 and an erasing head 5 are respectively fitted into the head insertion opening 3 of the plate 2 and fixed with an adhesive or the like.

On both sides of the head insertion opening 3 of the base plate 2, one side surface of the recording / reproducing head 4 and the erasing head 5 is held. A pair of tape guides 6 and 6 formed with a locking piece 7 to which one end of the tape abuts is formed so as to protrude forward. A guide recess 8 for guiding each of the heads 4 and 5 to a predetermined position is formed.

At the upper and lower positions of the head insertion opening 3 of the base plate 2, mounting holes 9 are respectively formed.
Further, in the present embodiment, on both lower sides of the base plate 2, reference surfaces 13 are formed as positioning reference portions which are cut out by horizontal lines passing through the center of the lower mounting hole 9. .

In the above-described embodiment, the reference portion is constituted by the reference surface 13 with respect to the lower mounting hole 9. However, for example, any shape such as a notch groove, a projection or a hole may be used. it may be, also, the reference unit, the base plate 2 of the upper, so as to form the one side such locations
It may be.

As shown in FIG. 2, there is provided a mounting jig 10 which is rotatable by 180 ° by a driving device (not shown) for mounting the base plate 2. The mounting jig 10 includes: The base plate 2 is brought into contact with each reference surface 13 of the base plate 2 and
A positioning projection 14 for performing positioning is formed.

Next, the operation of this embodiment will be described.

When assembling the magnetic head unit 1 in this embodiment, first, the heads 4 and 5 are inserted into the head insertion openings 3 of the base plate 2 so that the leading edges of the heads 4 and 5 are tape guides 6. Azimuth adjustment by adjusting the angular position of each of the heads 4 and 5 with a jig (not shown) with reference to the reference surface 13 of the base plate 2 in this state. Is to be performed. On the other hand, in a state where the heads 4 and 5 are adjusted so that the gap portions thereof are at predetermined positions with respect to the magnetic tape to be guided by the guide recess 8 of the base plate 2,
The heads 4 and 5 are fixed to the base plate 2 with an adhesive or the like.

Then, the heads 4, 5
After the azimuth adjustment and the fixing to the base plate 2 are completed, the reference surface 13 of the base plate 2 is brought into contact with the positioning projection 14 of the mounting jig 10 to perform positioning of the base plate 2, and the mounting hole is formed. 9, a screw (not shown) is screwed into the screw hole 12 of the mounting jig 10 to attach the base plate 2 to the mounting jig 10.
To be fixed.

Therefore, in the present embodiment, the azimuth adjustment of each of the heads 4 and 5 is performed with reference to the reference surface 13 formed on the base plate 2, as in the prior art. Since the azimuth adjustment is not performed based on the assumed reference position of the internal space, the reference position for positioning when adjusting the azimuth of the head can be easily specified, making it possible to perform extremely accurate and highly accurate azimuth adjustment. In addition, the azimuth adjustment of the head can be easily performed.

The positioning reference portion of the base plate 2 and the mounting jig
10 against the positioning protrusion 14 formed on the
By attaching the air head unit 1 to the mounting jig 10
Since the magnetic head device is configured,
Position the base plate 2 that has been adjusted
It can be attached to the attachment jig 10.

FIG. 3 shows another embodiment of the present invention, in which the inner surface of the head insertion opening 3 of the base plate 2 is shown.
At a position corresponding to the lower surface of the arrangement portion of the erasing head 5,
Reference boss 1 as a reference for positioning the erasing head 5
5 is formed to protrude so as to extend in the front-rear direction of the base plate 2, and a tip is formed at an acute angle on the inner surface of the upper surface of the base plate 2 and opposed to the reference boss 15. The pressing boss 16 which is easily deformed is formed so as to extend in the front-rear direction.

In this embodiment, the erasing head 5 is inserted between the reference boss 15 and the pressing boss 16 inside the head insertion opening 3 of the base plate 2 so that the erasing head 5 is inserted. The lower surface is positioned by the reference boss 15, and the pressing boss 16 is deformed and pressed against the upper surface of the erasing head 5, thereby holding the erasing head 5 in a positioned state.

In this case, since the bosses 15 and 16 are substantially in line contact or point contact with the upper and lower surfaces of the erasing head 5, the bosses 15 and 16 are held by the bosses 15 and 16. Even so, the azimuth adjustment of the erasing head 5 can be easily performed.

Therefore, in the present embodiment, simply by inserting the erasing head 5 into the head insertion opening 3 of the base plate 2, the erasing head 5 is held in a position relative to the reference boss 15 by the pressing boss 16. Therefore, the erasing head 5
In this case, the conventional position adjustment is unnecessary, and the positioning of the erasing head 5 can be easily performed.

Further, since the erasing head 5 is held by the bosses 15 and 16, when the erasing head 5 is fixed to the base plate 2 with an adhesive or the like, the bosses 15 are fixed. , 16 and the adhesive, it is possible to remarkably increase the holding strength of the erasing head 5, and to surely prevent the occurrence of displacement or the like due to the contraction stress of the adhesive. it can.

FIG. 4 shows still another embodiment of the present invention. In this embodiment, a reference hole is provided on the inner surface of the base plate 2 on the side of the head insertion opening 3 where the erasing head 5 is provided. The boss 15 is formed so as to protrude, and a deformable pressing boss 16 is formed so as to protrude from the inner surface of the head insertion opening 3 on the recording / reproducing head 4 side.

In this embodiment, each of the recording / reproducing head 4 and the erasing head 5 is inserted between the reference boss 15 and the pressing boss 16 in the head insertion opening 3 of the base plate 2 so that the erasing is performed. One side surface of the recording head 5 is positioned by the reference boss 15, and the pressing boss 16 is deformed and pressed against one side surface of the recording / reproducing head 4, whereby the recording / reproducing head 4 and the erasing head 5 is held in a positioned state.

Also in this case, each of the bosses 15, 1
The recording / reproducing head 6 is substantially in line contact or point contact with the side surfaces of the recording / reproducing head 4 and the erasing head 5. Azimuth adjustment of the head 4 and the erasing head 5 can be easily performed.

Therefore, in the present embodiment, FIG.
In the same manner as in the embodiment shown in FIG. 1, the recording / reproducing head 4 and the erasing head 5 are simply inserted into the head insertion opening 3 of the base plate 2 and are held in a positioned state by the respective bosses 15 and 16. The positioning of the recording / reproducing head 4 and the erasing head 5 can be easily performed.

Further, since the heads 4, 5 are held at predetermined positions by the bosses 15, 16, when the heads 4, 5 are fixed to the base plate 2 with an adhesive or the like. A special jig or the like for pressing the heads 4 and 5 against the base plate 2 becomes unnecessary, so that the structure of the jig can be simplified and the assembling work of the head can be simplified. Can be.

In each of the embodiments described above, the case where the recording / reproducing head and the erasing head are mounted has been described. However, for example, the same effect can be obtained by mounting only the reproducing head.

The present invention is not limited to the above embodiments, but can be variously modified as needed.

[0042]

As described above, in the magnetic head unit according to the first aspect of the invention , the azimuth adjustment of each head is performed with reference to the reference portion formed on the base plate. In addition, the reference position for positioning at the time of head azimuth adjustment can be easily specified, azimuth adjustment can be performed extremely accurately and highly accurately, and azimuth adjustment work of the head can be easily performed.

According to a second aspect of the present invention, each head
Angle position of the magnetic recording medium running on the base plate
Adjustment with reference to a notch having a plane parallel to
With the azimuth adjustment, the conventional
As shown in the figure, based on the assumed reference position of the internal space of the mounting hole.
No need to adjust azimuth, head azimuth adjustment
Easily define the reference position for positioning during settling
To perform extremely accurate and highly accurate azimuth adjustment.
And easy head azimuth adjustment
Can do it.

A magnetic head device according to a third aspect of the present invention.
The position is the same as the positioning reference part of the base plate of the magnetic head unit.
Abutting the positioning projection formed on the jig,
By attaching the head unit to the mounting jig,
Since the head device is configured, the azimuth
Position the base plate that has been adjusted properly and attach it to the mounting jig.
It has effects such as being able to be attached .

[Brief description of the drawings]

FIG. 1 is a front view showing a magnetic head unit according to the present invention.

FIG. 2 is a perspective view showing a mounting jig for mounting a base plate according to the present invention.

FIG. 3 is a front view of a base plate showing another embodiment of the present invention.

FIG. 4 is a front view of a base plate showing another embodiment of the present invention.

FIG. 5 is a perspective view showing a conventional magnetic head unit.

FIG. 6 is a front view of FIG. 5;

FIG. 7 is a perspective view showing a conventional mounting jig for mounting a base plate.

[Description of Signs] 1 Magnetic head unit 2 Base plate 3 Head insertion opening 4 Recording / reproducing head 5 Erasing head 6 Tape guide 9 Mounting hole 10 Mounting jig 13 Reference surface 14 Positioning projection 15 Reference boss 16 Pressing boss

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 5/56 G11B 5/55

Claims (3)

(57) [Claims] An opening for inserting a head is formed in a center portion of a base plate, and a magnetic head is fixed inside the opening for inserting a head of the base plate. A magnetic head unit mounted on a mounting jig which is turned 180 °, wherein a positioning reference portion for azimuth adjustment of each head is formed on the base plate. 2. A head insertion opening is formed in the center of the base plate.
And a magnetic plate inside the head insertion opening of the base plate.
The head plate is fixed, and the base plate is moved back and forth with the magnetic recording medium.
Attached to a mounting jig that is turned 180 ° with the road
In the magnetic head unit, a magnetic recording medium may be provided on the base plate.
Notch with a plane parallel to the running direction
A magnetic head unit characterized by the following. 3. The magnetic head unit according to claim 1, wherein
And formed on the positioning reference portion and the mounting jig.
The magnetic head is brought into contact with the positioning projections
A magnetic head device having a unit mounted.