JPS6085412A - Adjusting device of magnetic head - Google Patents

Abstract

PURPOSE:To perform adjustment easily for center deviation and azimuth deviation by forming a holding hole in a head carriage and inserting and arranging a head holder in this holding hole and forming an adjusting groove for center deviation and an adjusting groove for azimuth deviation on joining faces of both of them. CONSTITUTION:After a head holder 74 is fixed temporarily to a head carriage 42 by screws 94 and 94, a jig 104 is inserted to a V groove 96 and a V groove 100. This jig 104 is turned in these grooves to move the head holder 74 in the direction of an arrow B within a regulated range of a long hole 90, thus performing adjustment for center deviation. Similarly, a jig 106 is inserted to a V groove 98 and a V groove 102, and this jig 106 is turned in these grooves to move the head holder 74 in the direction of an arrow V within a regulated range of a circular hole 91, thus performing adjustment for azimuth deviation. After both adjustments are terminated, the head holder 74 is fixed to the head carriage 42 by an adhesive or is fixed there by tightening of screws 94 and 94.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head adjustment device, and more particularly to a magnetic head adjustment device used in a magnetic recording or reproducing device such as an electronic camera.

Recently, imaging devices such as solid-state image sensors and image pickup tubes have been combined with recording devices that use magnetic disks, which are inexpensive and have a relatively large storage capacity, as recording media to take purely electronic still photographs of the subject using a rotating magnetic sheet. An electronic still camera system has been developed in which images are recorded on the camera 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 magnetic sheets used in general magnetic recording/reproducing devices in that still image information and the like are recorded at high density, and it rotates at high speed. Therefore, a magnetic head that contacts a magnetic sheet to perform recording or reproduction on the magnetic sheet must be accurately aligned with respect to the magnetic sheet.

For these reasons, the magnetic wire used in electronic cameras, etc., and used for recording or reproducing still image information, etc., has the following characteristics: ■ Protrusion amount, ■ Tilt angle, ■ Center shift, ■ Azimuth, relative to the magnetic sheet. Five adjustments are required: corner and tilt, and these five adjustments will be sequentially explained below with reference to FIGS. 1 to 3.

In FIG. 1, 10 is a magnetic sheet, 12 is a magnetic head that performs recording or reproduction on this magnetic sheet, and 14 is provided at a position facing the magnetic head 12 with the magnetic sheet 10 in between. This is a regulating plate placed along the magnetic heel 12. The magnetic head requires a protrusion amount Ea within a predetermined range with respect to the magnetic sheet 10, and precise adjustment is required in order to perform 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 a magnetic head 12 is used, its inclination angle θa is as shown in FIG. 1, and the amount of deviation t! of the magnetic head 12 with respect to the center of the magnetic sheet 10 is as shown in FIG. b and azimuth angle θ
Furthermore, as shown in FIG. 3, the tilt angle θC of the magnetic head with respect to the magnetic disk 10 must be within predetermined compatible ranges.

An object of the present invention is to propose a magnetic head adjustment device that can easily adjust center deviation and azimuth deviation among the five adjustment amounts.

In order to achieve the above-mentioned object, the present invention has a holding hole formed in a head carriage, and a head holder with a magnetic head attached to the holding hole, which is disposed so as to be movable over a small distance. A circular hole is formed at the other end of the elongated hole in the direction perpendicular to the carriage movement direction, and a guide shaft for center deviation adjustment is located in the elongated hole, and a guide shaft for azimuth deviation adjustment is located in the circular hole. A groove for adjusting the center deviation is formed in the direction perpendicular to the moving direction of the carriage on the joining surface between the head holder and the head holder, and a groove for adjusting the azimuth deviation is formed in the direction parallel to the moving direction of the head carriage. The magnetic head is characterized by adjusting the center deviation and azimuth deviation of the magnetic head by inserting adjustment jigs into the respective grooves and swinging them.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a magnetic head adjustment device according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 4 shows a plan view of a magnetic sheet pack used in a magnetic recording or reproducing device such as an electronic camera, and FIG. 5 is a cross-sectional view taken along the line ■-■ in FIG. As shown in FIG. 4, the magnetic sheet bank 16 is configured in 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 sheet puncture 16. A window 24 in which a magnetic head, which will be described later, is located is opened in the magnetic sheet pack 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 bucket described later, and the magnetic sheet pack 16 is inserted into the inner bucket. The shutter 26 moves downward in FIG. 4 to open the head window 24 and close the magnetic sheet 18.
Recording and playback becomes possible.

FIG. 6 shows a magnetic recording or reproducing device, which includes a main body 28, an inner bucket 30,
It is composed of an upper lid 32. First, to explain the internal structure of the device main body 2i, a motor 34 for driving a magnetic sheet is disposed in the device main body 28, and a drive shaft 36 of this motor 34 is located at the center of the center core 20 of the magnetic sheet pack 16 shown in FIG. The magnetic sheet 18 is inserted into the hole 21 and rotated within the magnetic sheet bank 16 at a predetermined number of rotations. Also the 6th
In the figure, 38 is a magnetic head feeding motor, 40 is a lead screw connected to the output shaft of this motor 38,
Reference numeral 42 indicates a head carriage which is screwed into the lead screw 40 and is guided and moved by a guide shaft 44, and 46 is a magnetic head provided on the head carriage 42. Therefore, when the motor 38 is rotated at predetermined rotational speeds, the head carriage 46 is moved at predetermined pinch intervals in the axial direction of the guide shaft 44 by the rotation of the lead screw 40, and therefore the magnetic head 46 is moved in the radial direction of the magnetic sheet 18 ( It is possible to record or reproduce still image information on the magnetic sheet 18 one trunk at a time.

Incidentally, the mounting structure of the magnetic helix 46 will be described in detail in FIGS. 7 and subsequent figures.

A bracket 48.48 is provided at the end of the apparatus main body 28, and the inner bucket 30 and the upper lid 32 are pivotally supported on the bracket 48.48 via a pin 50.

The upper lid 32 is configured to have a shape capable of housing the inner bucket 30 as shown in the figure. A spring (not shown) is disposed between the main body 28 and the upper lid 32 and between the upper lid 32 and the inner bucket 30, so that when the upper lid 32 is opened as shown in FIG.
is separated from the apparatus main body 28 and the upper lid 32 to open the magnetic sheet puncture insertion opening 52 of the inner bucket 30.

In FIG. 6, the left end surface 54 of the inner bucket 30 has a shaft 56.
A locking member 58 is swingably supported via the locking member 58 . The locking claws 60 of the locking member 58 fit into four parts (not shown) of the magnetic seat back 16 to lock the magnetic seat puncture 16 in the inner bucket 30.

A leaf spring 6 bent into a crank shape is provided on the back side of the upper lid 32.
2.62 are provided at predetermined intervals, and this leaf spring 62.62
A regulation plate holder 64 is attached to. Regulation plate holder 6
4 has a length corresponding to substantially the entire width of the main body 28, and a regulating plate 66 is provided on the regulating plate holder 64 at a position facing the magnetic head 46 when the top cover 32 is closed. Regulation plate 66
A groove 68 is formed in the direction in which the magnetic head 46 moves.

In FIG. 7, □ shows the prescription structure of the magnetic head 46. The magnetic head 46 includes a head chip 70 that contacts the magnetic sheet 1o, and a head base 72 that supports the head chip 7o. The magnetic head 46 is attached to the head carriage 42 via a head holder 74. The head holder 74 includes a substrate 76 and an arm 78 having an abbreviated shape and a cantilevered structure. A holding hole 77 is formed in the head carriage 42, into which a substrate 76 is inserted from the bottom surface, and a head holder 74 is inserted into the holding hole 77.
can move minutely. One end of the arm 78 is integrally formed with the end of the substrate 76, and a rectangular slot plate 80 is provided at the other end. A screw hole 82 is formed in this mounting plate 80, and by screwing a magnetic head mounting screw 84 into this screw hole 82, the magnetic head 46 is attached to the mounting plate 80 of the arm 78.
attached to.

A threaded hole 86 is formed in the base plate 76 below the mounting plate 80, and an adjustment screw 88 is screwed into this threaded hole 86.

The adjustment screw 88 is in contact with the lower edge of the mounting plate 80 and the arm 7
The mounting plate 80 is moved up and down using the elastic deformation of the magnetic head 8 to adjust the amount of protrusion of the magnetic head 46. Furthermore, a long hole 90 and a circular hole 91 are formed at both ends of the substrate 76, and the long hole 90 is formed in a direction perpendicular to the moving direction of the carriage 42.

In the head carriage 42, threaded holes 92.92 are formed at positions corresponding to the elongated holes 90 and the circular holes 91.

This screw hole 92.92 has a head holder weighting screw 9.
The head holder 74 is attached to the head carriage body 42 by screwing 4.94. Long hole 90 and circular hole 9
Screws 94 are located in each of the holes 94 and 94, so when the head holder 74 has loosened the screws 94 and 94,
, can be moved minutely within the regulated range of the circular hole 91.

As shown in FIG. 7, the head carriage 42 has a groove 96.
．． 98 is formed, and a similar V is also formed on the head holder 74.
Grooves 100, 102 are formed. ■Groove 96 and ■Groove 1
00 are formed at positions opposite to each other when the head holder 74 is inserted into the holding hole 77 of the head carriage 42, and similarly, the ■ grooves 98 and the V grooves 102 are also formed at positions opposite to each other. The V-groove 96 and the V-groove 100 are formed on the joint surface in the direction perpendicular to the moving direction of the head carriage 42 and are used for adjusting center deviation, and the It is formed on the joint surface of the direction and is used for adjusting azimuth deviation. The members designated by reference numerals 104 and 106 are adjustment jigs shaped like flathead screwdrivers, and are used by being inserted into the grooves 96.1oo and 98.102. Incidentally, the screw 108 is a screw for tilt adjustment.

A method for adjusting a magnetic head using the embodiment of the present invention configured as described above will be described.

First, the pre-adjustment performed prior to the main adjustment will be explained with reference to FIGS. 8 and 9. In Figures 8 and 9,
A preset jig 110 is shown, and this preset jig 1
10 is formed with a reference surface 112 (corresponding to the back surface of the head carriage 42), and the head holder 7 is mounted on this reference surface 112.
4 with screws 94 and 94. Next, magnetic head 4
6 is temporarily fixed to the arm 78 with a screw 84, and the inclination adjustment screws 114 and l14 provided on the preset jig 110 are
, and the protrusion adjustment screw 88 to keep the first rotation angle α and the protrusion amount within predetermined tolerance values.

The magnetic head 46 whose extension angle and protrusion amount have been preadjusted within predetermined tolerances in this manner is attached to the head carriage 42 and the main adjustment is performed. First, the amount of protrusion is determined by bringing the adjusting screw 88 into contact with the mounting plate 8o of the arm 78 and moving it up and down. In this case, since the magnetic head 46 is supported by an arm 78 having a cantilevered structure, it moves along an arcuate trajectory and its inclination angle changes, but the arm 78 is formed with a sufficient length and can be adjusted. Since the amount of movement by the screw 88 is also very small, the movement of the magnetic head 46 is regarded as a linear movement and is not very difficult, so that the inclination angle will not exceed the permissible value by adjusting the amount of protrusion. Furthermore, even if the inclination angle changes due to the protrusion of the head, the influence of the error can be removed by conventional helad aging.

Next, center shift adjustment and azimuth shift adjustment will be explained with reference to FIG. First, after temporarily fixing the head holder 74 to the head carriage 42 with the screws 94 and 94, the jig 104 is inserted into the groove 96 and the V groove 100, and when the jig 104 is rotated in the jig 104, the head holder 74 is rotated. It is possible to move in the B direction within the regulation range of the elongated hole 90 and perform center shift adjustment. Similarly, ■ groove 98 and V groove 102
When the jig 106 is inserted and the jig 106 is rotated, the head holder 74 moves in the direction of arrow C within the regulated range of the circular hole 91, thereby adjusting the azimuth shift. After both adjustments are completed, the head holder 174 is fixed to the head carriage 42 with adhesive or by final tightening with screws 94 and 94.

It should be noted that the influence of errors caused by the tilt and tilt of the magnetic head 46 can be removed by head aging (idling the magnetic sheet in contact with the magnetic head).

In the above-described embodiments, the inclination angle, protrusion amount, center shift, and azimuth shift during the pre-adjustment and main adjustment are performed using an optical reading device such as a projector or a microscope.

As explained above, according to the magnetic head adjusting device according to the present invention, a holding hole is formed in the head 7-d cartridge, a head holder is inserted into the holding hole, and a center deviation adjusting groove is formed on the joint surface of the two. Since the groove for adjusting the azimuth deviation is formed, the center deviation adjustment and the azimuth deviation adjustment of the magnetic head can be performed using a simple adjustment jig.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the protrusion amount and tilt angle of the magnetic head, Fig. 2 is an explanatory diagram showing the center deviation of the magnetic head and the large angle of the azimuth 72, Fig. 3 is an explanatory diagram showing the tilt angle, and Fig. 4 is an explanatory diagram showing the tilt angle. FIG. 5 is a plan view of the magnetic sheet bank, FIG. 5 is a sectional view of the magnetic sheet puncture taken along the line ■-■ in FIG. 4, FIG. 6 is a perspective view of the magnetic recording or reproducing device, and FIG. Exploded perspective view, Figures 8 and 9 are illustrations of pre-adjustment, Figure 10
The figure is a sectional view showing the adjustment method of this embodiment. 42... Head carriage, 46... Magnetic head, 74... Head holder, 90... Long hole, 91
...Circular hole, 96.100...For adjusting center deviation■
Groove, 9B, 102...V groove for azimuth adjustment, 10
4.106...Adjustment jig. Agent Patent Attorney Kenzo Matsuura Fig. 1 Fig. 2 Fig. 3 Fig. θr Fig. 4 Fig. 5 Fig. 7 Fig. 1=,, 40 兇一一' 77. 92 8 42/゛ri＼～゛：°゛78 70 ノも0 ゛Benny', - ″O°Tatsuni +7″1(”+9, Fig. 8 δ Fig. 9 +10!

Claims (1)

[Claims] Attached to the head carriage via a head holder,
In a magnetic head adjustment device that moves in the radial direction of a rotating magnetic sheet to perform recording or reproduction on the magnetic sheet,
A holding hole is formed in the head carriage, and a head holder is arranged in this holding hole so as to be movable over a small distance.
The head holder has a long hole in the direction perpendicular to the direction of head carriage movement at one end and a circular hole at the other end.
A guide shaft for adjusting center deviation is located in the elongated hole, a guide shaft for adjusting azimuth deviation is located in the circular hole, and a guide shaft for adjusting center deviation is located in the joint surface of the head carriage and the heel holder in the direction perpendicular to the direction of carriage movement. At the same time, grooves for adjusting azimuth deviation are formed in the direction parallel to the moving direction of the head carriage, and adjusting jigs are inserted into each adjusting groove and rotated to center the magnetic head. A method for adjusting a magnetic head characterized by performing deviation adjustment and azimuth deviation adjustment.