JPS647460Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a height adjusting device for a magnetic head installed in a cassette tape recorder or the like.

In conventional magnetic head devices, no matter how accurately the mounting position of the magnetic head is designed, slight wastage generally occurs due to mounting errors and dimensional errors in materials. For this reason, conventional devices for adjusting the height of the magnetic head include a head base 1, a magnetic head 2, and a head for fixing tape guides 3 provided on both sides of the magnetic head 2, as shown in FIGS. Between the base plate 4, the collar 5
and an elastic member 6 consisting of a spring or the like,
Insert the screw 7 from above the extending end 4a of the head base plate 4.
Screwed onto the head base 1 via the collar 5,
Also, a screw 8 is inserted from above the other extending end 4b of the head base plate 4.
is screwed onto the head base 1 via the elastic member 6 to fix the head base plate 4 to the head base 1, and the degree of compression of the elastic member 6 is determined by the degree of tightening of the screw 8 to the head base 1. Some devices utilize this change to adjust the height of the magnetic head 2 relative to the head base 1.

However, in the conventional device described above, the height of the magnetic head is adjusted only by changing the degree of compression of the elastic member 6 by one end of the head base plate, that is, the screw 8. The height dimensional accuracy of the collar 5 disposed at the other end of the head base plate 4 is required, and the dimensional accuracy of the bending etc. of the head base plate 4 is also required. However, unnecessary tilting may occur.

An object of the present invention is to provide a magnetic head height adjusting device which eliminates the above-mentioned drawbacks of the conventional device and can easily and reliably adjust the height of the magnetic head.

In order to achieve this objective, the present invention provides an adjustment plate having an elastic member, planes having different heights, and a tapered portion formed between the planes, between the head base and the head base plate. It is characterized by

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5. In FIGS. 3 to 5, the same reference numerals as in FIGS. 1 and 2 indicate the same or equivalent parts.

The main difference from the conventional device shown in FIGS. 1 and 2 is that an adjustment plate 9 is provided.
That is, the head base plate 4 fixes the magnetic head 2 and the tape guides 3 provided on both sides of the magnetic head 2.
A notch hole 10 is provided at the other extending end 4b, and a screw 8 inserted through the notch hole 10 is screwed into the head base 1 via an elastic member 6 made of a spring or the like. On the other hand, a screw 7 is also inserted through the extending end 4a of the head base plate 4 and screwed into the head base 1, but there is a gap between the extending end 4a of the head base plate 4 and the head base 1. , head base 1
Planes 11a, 11b, 1 having different heights from
1c, 11d, 11e, and tapered portions 12a, 12b, 12c, 12d between each plane.
Moreover, an adjustment plate 9 is interposed in the center thereof, which has a horizontally long hole 13 extending along each plane. Then, place the extending end 4a of the head base plate 4 on the flat surface 11c of an arbitrary height, and place the screw 7.
is screwed into the head base 1 by inserting the extending end 4a through the elongated hole 13.

Next, the height adjustment of the magnetic head in the embodiment having the above configuration will be explained.

First, on the mounting part of the screw 7 of the head base 1,
A plane 11c indicating the center value of the height of the adjustment plate 9 is located, one extending end 4a of the head base plate 4 is placed on this plane 11c, and the screw 7 is connected between the one extending end 4a and the head base plate 4. Insert the head base 1 through the long hole 13.
to be screwed together. On the other hand, the other extending end 4b of the head base plate 4
The screw 8 is inserted into the notch hole 10 and screwed onto the head base 1 via the elastic member 6. This screw 7,
8 fixes the head base plate 4 to the head base 1. Next, the tape (not shown) and the magnetic head 2
Adjust the azimuth to make sure that the core is in proper contact with the head base 1, rotate the screw 8 to adjust the degree of tightening of the screw 8 to the head base 1, and tighten the elastic member 6.
The height of the head base plate 4 with respect to the head base 1, that is, the height of the magnetic head 2 with respect to the head base, is adjusted by changing the degree of compression of the magnetic head. However, if the azimuth adjustment is not complete with only the elastic member 6 and the screw 8, loosen the screw 7 and adjust the flat surface 11c.
The extending end 4a of the head base plate 4 placed on the
If the magnetic head 2 is high, move the adjustment plate 9 so that it is placed on the flat surface 11b or 11a, and if the magnetic head 2 is low, so that it is placed on the flat surface 11d or 11e, and then tighten the screws 7. By tightening the head base 1 again, the azimuth adjustment of the magnetic head 2 is completed.

When the adjusting plate 9 is moved, the other extending end 4a of the head base plate 4 is elastically supported by the elastic member 6 and the screw 8, so if the screw 7 is loosened, the elongated hole 13 The screws 7 can be moved within the adjustment plate 9 while remaining screwed into the head base, and the tapered portions 12a to 12d provided between the respective planes allow the extending end 4a of the head base plate 4 to move smoothly into the 1st position. You can move from one plane to another.

In the above embodiments, the elastic member 6 is illustrated as a spring, but it is also possible to use an elastic cylinder made of rubber or the like.

As explained above, according to the present invention, an elastic member and an adjusting plate each having a plane having a different height and a tapered portion formed between the planes are disposed between the head base and the head base plate. By using an adjusting plate having a tapered part and a flat part, it is possible to provide a magnetic head height adjusting device in which the height of the magnetic head can be easily and reliably adjusted by moving the adjusting plate.

[Brief description of the drawings]

Fig. 1 is a side view showing a conventional magnetic head device, Fig. 2 is a perspective view showing a collar of the same magnetic head device, Fig. 3 is a side view showing an embodiment of the present invention, and Fig. 4 is an implementation of the same. The top view of the example and FIG. 5 are perspective views showing the main parts of the example. 1...Head base, 4...Head base plate, 6...
...Elastic member, 9...Adjustment plate, 11a, 11b, 1
1c, 11d, 11e...flat surface of adjustment plate, 12
a, 12b, 12c, 12d, 12e...Tapered portions of adjustment plates.

Claims (1)

[Scope of utility model claims] A height adjustment device for a magnetic head, characterized in that an elastic member and an adjustment plate having planes having different heights and a tapered portion formed between the planes are disposed between the head base and the head base plate. .