JPS6336496Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a magnetic head mounting device that uses a combination head that integrates a recording head and a reproducing head, and in particular to a combination magnetic recording and reproducing device that performs short wavelength recording and reproducing. It is highly effective when applied to young heads.

1. Structure of a conventional example and its problems FIG. 1 shows a top view of a conventional magnetic head mounting device. 1 is a combination head having a recording gap 2 and a reproduction gap 3; 4 is a magnetic tape as a recording/reproducing medium; 5 and 6 are posts for winding the magnetic tape 4 around the combination head 1; 7 is a magnetic field for the recording gap 2. 8 is the input winding angle of the tape 4, 8 is the output winding angle with respect to the recording gap 2, and 9 is the magnetic tape 4 with respect to the reproduction gap 3.
10 indicates the inlet wrap angle, and 10 indicates the outlet wrap angle with respect to the regeneration gap 3. When the combination head 1 is mounted with the above configuration, the following problems arise, particularly in magnetic recording and reproducing apparatuses that perform recording and reproducing of short wavelengths. That is, since the exit winding angle 8 with respect to the recording gap 2 and the entrance winding angle 9 with respect to the reproducing gap 3 are determined by shaping the magnetic tape winding surface 11 of the combination head 1, they are each optimized. In order to obtain the desired wrapping angle, it is necessary to adjust the entrance wrapping angle 7 with respect to the recording gap 2 and the exit wrapping angle 10 with respect to the reproducing gap 3 with high accuracy. In other words, the wrap angles 7 and 10 on the inlet and outlet sides of each of the above-mentioned gaps 2 and 3
At the same time, the recording gap 2 and the playback gap 3 are integrated, so after adjusting the wrap angle 7 on the entry side for the recording gap 2, the When adjusting the wrapping angle 10 on the exit side,
It has been extremely difficult to adjust only the exit side wrap angle 10 of the reproducing gap 3 without changing the input side wrap angle 7 of the recording gap 2.

OBJECT OF THE DEVICE The object of the present invention is to provide a magnetic head mounting device which can easily and accurately set the combination head and its tape winding angle.

Structure of the invention The present invention has a unit base rotatably provided on the device board, a head base rotatably provided with respect to the unit base, and a combination head further provided on the head base. The magnetic tape sliding surface of at least one of the two magnetic tape winding means disposed on both sides of the combination head is a cylindrical surface, and the central axis of this surface is the center of rotation of the unit base. The winding angle of the playback gap and the winding angle of the recording gap can be adjusted independently by the rotation of the unit base and the rotation of the unit base.

DESCRIPTION OF EMBODIMENTS FIG. 2 is a top view of an embodiment of the present invention. Here, the same numbers as in FIG. 1 indicate the same members.
12 is a head base to which the combination head 1 is attached, and 18 is a unit base on which the head base 12 is placed so as to be positionable. This unit base 18 is a magnetic tape winding means (hereinafter referred to as a post) installed upright on a device board (not shown).
It is mounted on the device board so as to be rotatable about 6, and is fixed to the device board with fixing screws 21 and 22. The head base 12 is mounted on the unit base 18 so as to be rotatable about a shaft 13 erected on the unit base 18, and fixed screws 16, 17
It is fixed to the unit base 18 by.

The operation will be explained below in accordance with the installation procedure of the magnetic head. First, a case will be described in which the exit side winding angle 10 of the magnetic tape 4 with respect to the reproduction gap 3 is adjusted.
The magnetic tape 4 used at this time is an adjustment playback-only tape on which standard signals are recorded. While running the magnetic tape 4 and measuring the reproduction signal obtained from the reproduction gap 3, the head base 1 to which the combination head 1 is attached is moved around the shaft 13.
Rotate 2. The rotation mechanism of the head base 12 will be explained with reference to FIG. In FIG. 3, the adjustment jig 23 is inserted into the adjustment hole 15 drilled in the unit base 18, the tooth profile 14 formed on the head base 12 is meshed with the gear of the adjustment jig 23, and the head base 12 is centered around the shaft 13. The winding angle on the exit side is 10.
The head touch of the magnetic tape 4 with respect to the playback gap 3 changes by changing. The reproduced signal at this time is measured, and when a reproduced signal with predetermined characteristics is obtained, the rotation of the head base 12 is finished and fixed with the fixing screws 16 and 17. In the above manner, the head touch of the magnetic tape 4 with respect to the reproduction gap 3 is optimally adjusted.

Next, the entrance winding angle 7 of the magnetic tape 4 with respect to the recording gap 2 is adjusted. The magnetic tape 4 used at this time is an unrecorded adjustment recording/reproducing tape. The magnetic tape 4 is run and the signal recorded by the recording gap 2 is reproduced by the reproduction gap 3.
While measuring, move the head base 12 around the post 6.
The unit base 18 on which the unit base 18 is mounted is rotated, and the reproduced signal at this time is measured. When a reproduced signal with predetermined characteristics is obtained, the rotation of the unit base 18 is completed and fixed with fixing screws 21 and 22. unit base 18
The rotating means has the same structure as the rotating means of the head base 12, and the adjusting jig 23 is inserted into the hole 2 of the device board.
The position of the unit base 18 can be adjusted by inserting it into the position 0 and driving the tooth profile 19.

This completes the adjustment of the winding angle of the magnetic tape 4 with respect to the recording gap 2 and reproduction gap 3 of the combination head 1.

According to the above structure, it has conventionally been very difficult to adjust the winding angle of the magnetic tape 4 with respect to the recording gap 2 and the reproduction gap 3 independently. The combination head 1 can be installed very easily. Further, in the head mounting device of the present invention, the post 6, which wraps the magnetic tape 4 around the playback gap 3, is the center of rotation when adjusting the winding angle of the recording gap 2. 3 does not change when adjusting the wrapping angle of recording gap 2, the wrapping angle of playback gap 3 always maintains the optimum wrapping angle when adjusting the wrapping angle of recording gap 2, and the recording signal of recording gap 2 The optimal wrapping angle of the recording gap 2 can be easily adjusted by monitoring the recording gap 3 with the reproduction gap 3.

Further, in the above embodiment, the center axis of the post is used as the center of rotation of the unit base 18, but even when using a winding means other than the post, the central axis of the surface forming the tape sliding contact surface of the winding means may be used. It goes without saying that it is sufficient to use the center of rotation as the center of rotation.

Effects of the invention As is clear from the above embodiments, the present invention has a unit base rotatably mounted on the device board.
In addition, a head base is rotatably provided on the unit base, and a combination head is mounted on this head base.In particular, one of the two magnetic tape winding means has a sliding surface as a cylindrical surface, and this By setting the central axis of the cylindrical surface as the center of rotation of the unit base, it has the excellent effect of being able to independently adjust the tape winding angles of the recording head and reproducing head of the combination head. .

[Brief explanation of drawings]

Fig. 1 is a top view for explaining the relationship between the combination head and the tape winding angle, Fig. 2 is a top view of a magnetic head mounting device in an embodiment of the present invention, and Fig. 3 is a top view of the combination head and the head base. FIG. 1... Combination head, 2... Recording gap, 3... Playback gap, 5, 6... Magnetic tape winding means (post), 12... Head base,
18...Unit base.

Claims (1)

[Scope of utility model registration request] A unit base is rotatably provided on the device board, at least one of the two magnetic tape winding means has a magnetic tape sliding surface as a cylindrical surface, and the center axis of this surface is the center of rotation of the unit base; A head base is rotatably provided on the unit base, a combination head in which a recording head and a reproducing head are integrated is provided on the head base, and a means for fixing the head base to the unit base and a means for fixing the unit base to the device board are provided. A magnetic head mounting device characterized in that it is provided with means for