JPS62246117A - Attaching structure for magnetic head - Google Patents

Abstract

PURPOSE:To perform centering adjustment and azimuth adjustment with a simple structure by attaching an azimuth adjusting plate freely turnably on a centering adjusting plate, which is freely turnably attached to a head carriage, so that their centers of turning are shifted from each other. CONSTITUTION:A screw 100 provided on a standing piece 98 is turned to perform centering adjustment of a magnetic head 46. That is, when the screw 100 is turned, the first adjusting plate 66 is turned around a screw 92 because the front end part of the screw 100 is engaged with a hole 106 of the first adjusting plate 66, and the second adjusting plate 68 is turned together because it is arranged on the first adjusting plate 66, thus performing centering adjustment of the magnetic head 46. A screw 86 provided on a standing piece 82 is turned to perform azimuth adjustment. That is, when the screw 86 is turned, the second adjusting plate 68 is turned around a screw 76 because the screw 86 is engaged with a standing piece 72 of the second adjusting plate 68. the magnetic head 46 is turned around the gap because the screw 75 is placed just under the gap of the magnetic head 46, thus performing azimuth adjustment.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a mounting structure for a magnetic head, and more particularly to a mounting structure for a magnetic head used in a magnetic recording or reproducing device such as an electronic camera.

[Background of the invention]

Recently, an imaging device such as a solid-state image sensor or an image pickup tube is combined with a recording device that uses a magnetic sheet, which is inexpensive and has a relatively large storage capacity, as a recording medium, and the subject is photographed purely electronically using a rotating magnetic sheet. Electronic camera systems have been developed in which images are recorded on the computer and the images are played back using a separate television system or printer.

By the way, this type of magnetic sheet used in electronic cameras and the like differs from the magnetic sheet used in general magnetic recording and reproducing devices, in that it records still images or video information at high density, and rotates at high speed. . Therefore, magnetic heads that record on or read from magnetic sheets by contacting them are used in electronic cameras and the like because of the need for accurate alignment adjustment with respect to the magnetic sheets.
The magnetic head used for recording or reproducing still image information, etc. has three characteristics with respect to the magnetic sheet: ■ protrusion amount, ■ tilt angle, and ■
Five adjustments are required: center shift, ■ azimuth shift, and ■ tilt. Of these, (2) tilt angle and (2) tilt, if they are minute, can be dealt with only by head aging without adjustment. Figures 1 to 3 below
These five adjustments will be sequentially explained according to the diagram.

In FIG. 1, reference numeral 10 denotes a magnetic sheet, 12 a magnetic head for recording or reproducing information on the magnetic sheet 10, and 14
is a regulation plate that is provided at a position facing the magnetic head 12 with the magnetic sheet 10 in between, and allows the magnetic sheet 10 to align with the magnetic head 12.

The magnetic head 12 requires a protrusion 11Ea within a predetermined range relative to the magnetic sheet 10, and precise adjustment is required to achieve better recording and reproduction and prevent wear of the magnetic head and recording medium. .

In addition, in order to obtain good reproduced images even when the same recording medium is loaded into different playback machines, the recording head and playback head are separated, as in the case where the recorder and playback machine are configured separately. When using a magnetic head, the inclination angle θa as shown in FIG. 1, the deviation 'IEb of the magnetic head 12 with respect to the center of the magnetic sheet 10 as shown in FIG.
Furthermore, as shown in FIG. 3, the tilt angle θC of the magnetic head with respect to the magnetic sheet 10 must be within a predetermined compatible range.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and it is an object of the present invention to propose a magnetic head mounting structure that allows centering adjustment and azimuth adjustment with a simple structure.

[Summary of the invention]

To achieve the above object, the present invention provides a mounting structure for a magnetic head that is mounted on a head carriage and moves in the radial direction of a rotating magnetic sheet to perform recording or reproduction on the magnetic sheet. A base plate, a centering adjustment plate rotatably mounted on the base plate, a centering adjustment member provided on the base plate for rotating the centering adjustment plate, and a magnetic head are provided, and the centering adjustment plate is rotatably mounted on the base plate. An azimuth adjustment adjustment plate that is rotatably supported by the centering adjustment plate at a position different from the rotation fulcrum of the centering adjustment plate, and an azimuth adjustment that rotates the azimuth adjustment adjustment plate that is provided on the centering adjustment plate. parts and
It is characterized by having the following.

〔Example〕

Hereinafter, preferred embodiments of the magnetic head mounting structure according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4 shows a plan view of a magnetic seat back used in a magnetic recording or reproducing device such as an electronic camera, and FIG. 5 is a sectional view taken along line A--A in FIG. 4. As shown in FIG. 4, the magnetic seat back 16 has a substantially rectangular shape.
Magnetic sheet 18 on which still image information etc. are recorded
is rotatably stored. A center core 20 as a reinforcing member is provided in the center of the magnetic sheet 18, and this center core 20 is exposed to the outside through a circular opening 22 of the magnetic seat back 16, and a central core 20 is provided in the opening 22. supported. A window 24 in which a magnetic head, which will be described later, is located is opened in the magnetic seat back 16, and this window 24 for the magnetic head is opened and closed by a slideable shutter 26.

That is, the shutter 26 closes the window 24 to prevent dust from adhering to the magnetic sheet 18 before the magnetic sheet puncture 16 is inserted into the inner packet described later, and the magnetic seat back 16 is inserted into the inner packet. The shutter 26 moves downward in FIG. 4 to open the head window 24, making it possible to record and reproduce information on the magnetic sheet 18.

In FIG. 6, a magnetic recording or reproducing device is shown, and the magnetic recording or reproducing device is composed of a chassis 28, a packet 30 into which the magnetic seat back 16 is inserted, and a top cover 32. First, to explain the internal structure of the chassis 28, a motor 34 for driving a magnetic sheet is disposed in the chassis 28, and when the upper part 1i[32 is closed, this motor 34
The drive shaft 36 fits into the center hole 21 of the center core 20 of the magnetic seat back 16 shown in FIG. 5, and rotates the magnetic sheet 18 within the magnetic seat back 16 at a predetermined number of rotations. Further, in FIG. 6, 38 is a motor for driving the magnetic head;
0 is a lead screw, 41 is a guide shaft, 42 is a head carriage that is screwed together with the lead screw 40 and is moved by the lead screw 40, and 46 is attached to the head carriage 42 via a magnetic head attachment structure 45 according to the present invention. This is a magnetic head. Therefore, when the motor 38 is rotated at a predetermined number of revolutions, the head carriage 42 is moved at a predetermined pitch in the axial direction of the guide shaft 41, and therefore the magnetic head 46 is moved in the radial direction of the magnetic sheet 18. Still image information can be recorded or reproduced by forming a circular or spiral trunk on top.

Leaf springs 50.50 are provided at predetermined intervals on the back surface of the upper M32, and a regulating plate holder 52 is attached to these temporary springs 50.50. The regulating plate holder 52 has a length corresponding to approximately the entire width of the chassis 28, and the regulating plate holder 52 has an upper part.
A regulating plate 5 is placed at a position facing the magnetic head 46 when the magnetic head 32 is closed.
4 are provided. A groove 56 is formed in the regulation plate 54 in the direction of movement of the magnetic head 46 . On the other hand, chassis 2
8, on the left side there is a bottle 58 set up, on the right side there is a bottle 60,62 set up, and on the right side there is a bottle 58.
8, 60, and 62 are the elongated holes 53 and holder surfaces 55 provided in the regulating plate holder 52, respectively, on the upper surface when the upper cover 32 is closed.
, abuts on or fits into the round hole 57 to regulate the height of the regulation plate 54 so as to maintain a predetermined distance from the magnetic head 46, and to perform accurate positioning.

A bottle (not shown) is placed on the receiver of the magnetic sheet pack 16, and the magnetic sheet 18 attached to the drive shaft is placed on the back 16.
Rotates within the bag 16 without touching.

7 and 8 are drawings showing a mounting structure for a magnetic head according to the present invention, with FIG. 7 being an exploded perspective view thereof, and FIG. 8 being a perspective view showing its assembled state. The head mounting structure 45 is mounted on the head carriage 42 and includes a base plate 64, a (first) adjustment plate 66 for centering adjustment, and a (second) regulation plate 68 for azimuth adjustment as main members. ing.

The second adjusting plate 68 has upright pieces 70 and 72 on two sides.
is bent upward, and the magnetic head 46 is attached to one of the upright pieces 70 via screws 74.

The second adjusting plate 68 is rotatably mounted on the first adjusting plate 66 around a screw 76 and a spring washer 77. That is, the screw 76 is inserted into the hole 78 formed in the first adjusting plate 66.
The second adjustment plate 68 is also inserted into a hole 80 formed in the second adjustment plate 68, and the second adjustment plate 68 is rotatably attached to the first adjustment plate 66 around a screw 76. and Sufu 6 is magnetic head 4
Therefore, the magnetic head 4 is located below the gap center of the magnetic head 4.
6 can be rotated uj around the gap. An upright piece 82 is bent and formed on the second adjustment plate 66, and a hole 84 is formed in this upright piece 82, and an azimuth adjustment screw 86 is inserted into this hole 84. Azimuth adjustment screw 8
6 is inserted into the hole 84 of the upright piece 82 and connected to the screw hole 9 of the upright piece 72 of the second adjusting plate 68 via the spring 88.
Screwed into 1. Thereby, by rotating the screw 86, the second adjusting plate 68 can be rotated about the stopper 6. That is, the azimuth can be adjusted by rotating the magnetic head 46 around its gear. The spring 88 is located between the upright piece 72 and the upright piece 82, and is a spring that biases the second adjusting plate 68 to rotate in one direction.

The first adjustment plate 66 is rotatably attached to the base plate 64 via screws 92 and spring washers 93. That is, a hole 94 is formed in the base plate 64 and a hole 96 is also formed in the first adjustment plate 66, and the screw 92 is inserted into the base plate 6.
hole 94.4 through the spring washer 93 from below.
96, whereby the first adjusting plate 66 is rotatably attached to the base plate 64. In addition, the second adjusting plate 6
8 is formed with an arcuate groove 69, and the tip of the screw 92 is positioned within this arcuate groove 69 so as not to impede the rotation of the second adjustment plate 68. An upright piece 98 is bent and formed on the base tentan 64, and a screw 100 is screwed into this upright piece 98. That is, the screw 100 is inserted into the hole 102 of the upright piece 98.
is pushed through and screwed into the hole 106 of the upright piece 82 of the first adjustment plate 66 via the spring 104. Therefore, by rotating the screw 100, the first adjusting plate 66 will rotate around the screw 92.

Note that the spring 104 is a spring that biases the first adjustment plate 66 in one direction.

The base plate 64 is fixed onto the head carriage body 42.

That is, holes 108.108.108 are formed in the base plate 64, and holes 110.110.110 are formed in the carriage 42 corresponding to the holes 108.108.108.

Insert three screws 112 (only one is shown) from below the carriage 42 into the holes 11O and 10B, and
4 to the head carriage 42. A magnetic head mounting structure 45 assembled in this manner is shown in FIG.

The operation of the embodiment of the magnetic head mounting structure according to the present invention constructed as described above is as follows.

First, the centering adjustment of the magnetic head 46 is performed. Centering adjustment is performed by rotating a screw 100 provided on the upright piece 98. That is, when the screw 100 is rotated, the tip of the screw 100 is screwed into the hole 106 of the first adjustment plate 66, so this rotation causes the first adjustment plate 66 to
can be rotated around the screw 92. 1st
When the adjusting plate 66 rotates around the screw 92, since the second adjusting plate 68 is placed on the first adjusting plate 66,
It rotates together with the first adjusting plate 66, thereby adjusting the centering of the magnetic head 46.

Next, azimuth adjustment will be explained. Azimuth adjustment is performed by rotating a screw 86 provided on the upright piece 82. That is, the screw 86 is connected to the upright piece 7 of the second adjusting plate 68.
By rotating this screw 86, the second adjustment plate 68 is rotated about the stopper 6. Since the screw 76 is located directly below the gap of the magnetic head 46, the magnetic head 46 rotates around the gap, thereby making it possible to adjust the azimuth.

Such azimuth adjustment involves rotating the standard sheet and bringing the magnetic head 46 into contact with it, reproducing the standard signal,
Appropriate azimuth adjustment can be made by selecting the position of maximum output.

Incidentally, since the azimuth adjustment is performed after the centering adjustment, even if the azimuth angle is deviated by rotating the first adjusting plate 66 during the centering adjustment, it is not a problem because it will be returned to its original value by the subsequent adjustment.

FIGS. 9 and 10 show other embodiments of the present invention,
The difference from the embodiment shown in FIG. 7 is that a bottle 200 is used to increase adhesive strength. That is, holes 202, 204, 20 are formed in the base plate 42, the first adjustment plate 64, and the second adjustment plate 66.
6, a bottle 200 is inserted into this hole from the bottom, and the area around the bottle 200 is fixed with adhesive 208, 210 as shown in FIGS. 10(A) and 10(B). In the embodiment shown in FIG. 10(A), the holes 204 and 206 are formed to a size that allows the bottle 200 to be inserted therethrough, and the area around the bottle 200 is fixed with adhesive. In addition, the embodiment shown in FIG. 10(B) has hole 2.
06.208 is formed into a small diameter, and adhesive is poured into this to fix the first and second adjusting plates 66, 68 and the base plate 64. In either embodiment, the bottle 20
By interposing 0, the adhesive strength is increased.

〔Effect of the invention〕

As explained above, according to the magnetic head mounting structure according to the present invention, the azimuth adjustment adjustment plate can be rotated by shifting the center of rotation above the centering adjustment plate rotatably attached to the head carriage. It has a simple structure and is easy to use. Centering adjustment and azimuth adjustment can be performed by operation.

In particular, conventional centering adjustment was performed by moving the magnetic head parallel to the center of the sheet, which required two guide members, but according to the present invention, the centering adjustment is performed by rotating the magnetic head Since the centering adjustment is performed, there is no need for a guide member.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the protrusion amount and tilt angle of the magnetic head, Figure 2 is an explanatory diagram showing the center alignment and azimuth deviation of the magnetic head, Figure 3 is an explanatory diagram showing tilt, and Figure 4 is an explanatory diagram showing the magnetic sheet. FIG. 5 is a sectional view of the magnetic seat back taken along the line A-A in FIG. 4, FIG. 6 is a perspective view of the magnetic disk drive, and FIG. 7 is a diagram showing the installation of the magnetic head according to the present invention. FIG. 8 is an exploded perspective view showing an embodiment of the structure; FIG. 8 is an assembled perspective view of an embodiment of the magnetic head mounting structure according to the present invention; FIG. 9 is an exploded perspective view of another embodiment of the present invention; Figure (A),
(B) is a sectional view taken along the line XX in FIG. 8. 18... CNN receipt 28... jersey,
42... Head carriage, 45... Head mounting structure, 46... Magnetic head, 64... Base plate, 6G... First adjustment plate, 68... Second adjustment plate, 82 ...Upright piece, 86...screw,
98... Standing piece, 1°O... Screw.

Claims (1)

[Claims] (1) In the mounting structure of a magnetic head that is attached to a head carriage and moves in the radial direction of a rotating magnetic sheet to perform recording or reproduction on the magnetic sheet, there is a base plate attached to the head carriage and a base plate on the base plate. A centering adjustment plate rotatably mounted, a centering adjustment member provided on the base plate for rotating the centering adjustment plate, and a magnetic head, which serves as a rotation fulcrum for the centering adjustment plate. It is characterized by having an azimuth adjustment adjustment plate that is rotatably supported by the centering adjustment plate at different positions, and an azimuth adjustment member that is provided on the centering adjustment plate and rotates the azimuth adjustment adjustment plate. Mounting structure of the magnetic head.