JPS618717A - Adjusting jig device of magnetic head - Google Patents

Abstract

PURPOSE:To adjust easily the projecting quantity, the angle of inclination, misalignment, and flapping with an easy operation by operating adjusting screws to adjust the vertical and horizontal positional deviation from the center of interference fringes and the positional deviation from crossing transverse line and longitudinal line in the visual field of a microscope. CONSTITUTION:A block 45 to which a head 46 is set is held temporarily, and adjusting screws are operated to adjust flapping and tilt if a head gap G in the visual field of an interference microscope is deviated from the center of interference fringes in the vertical direction and the horizontal direction. Next, the azimuthal deviation and misalignment from crossing transverse line and longitudinal line in the visual field of a microscopic lens 154 are adjusted by operating screws. The head 46 is placed in the focus position in the Z direction to terminate adjustments. Thus, a chassis and the head block 45 are supported with a simple attaching jig to perform individual adjustments easily with high precision.

Description

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

[Background of the invention]

Recently, imaging devices such as solid-state image sensors and image pickup tubes are combined with recording devices that use magnetic disks, which are inexpensive and have a relatively large storage capacity, to photograph objects 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.
A magnetic head used for recording or reproducing still image information, etc. requires five adjustments: the amount of protrusion with respect to the magnetic sheet, (2) flJt angle, (2) center shift, (2) azimuth shift, and (2) tilt. Of these, (2) spread angle and (2) drift, if they are minute, can be dealt with only by head aging without adjustment. 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 for recording or reproducing on this magnetic sheet 1'0, 1
A regulating plate 4 is provided at a position facing the magnetic head 12 with the magnetic sheet 10 in between, and makes the magnetic sheet 10 align with the magnetic head 12.

The magnetic head/head 12 requires a protrusion amount Ea within a predetermined range with respect to the magnetic sheet 10, and precise adjustment is required to achieve better recording/reproduction and prevent wear of the magnetic head and recording medium. There is a need.

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. In the case of using the other angle θa as shown in FIG. 1, the amount of deviation Eb of the magnetic head 12 from the center of the magnetic sheet 10 and the azimuth deviation θb shown in FIG.
Furthermore, as shown in FIG. 3, the tilt angle θC of the magnetic head with respect to the magnetic sheet 1o must be within a predetermined compatible range.

In this way, the magnetic head requires five adjustments,
If an attempt is made to incorporate an adjustment mechanism that performs these five adjustments into an electronic camera, the electronic camera will become large and complicated, making it less portable. Furthermore, if the adjustment mechanism is miniaturized and forcibly incorporated into an electronic camera, the necessary dimensions for the adjustment mechanism cannot be obtained, resulting in a problem that it is difficult to achieve the desired accuracy.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and provides a magnetic head that can easily adjust protrusion amount, tilt angle, center shift, and tilt adjustment by using a simple adjustment jig. The purpose is to propose an adjustment jig device.

[Summary of the invention]

In order to achieve the above object, the present invention includes a mounting jig that is erected on a base and includes a support part for a magnetic disk device main body;
a magnetic head holding means for temporarily holding the magnetic head until it is fixed to the magnetic disk drive main body; a moving means connected to the magnetic head holding means for moving the magnetic head held by the magnetic head holding means; and a moving means for moving the magnetic head held by the magnetic head holding means; It is characterized by comprising a measuring means for measuring the relative position of the magnetic head.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a magnetic head adjustment jig 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 bank used in a magnetic recording or reproducing device such as an electronic camera, and FIG. 5 is a sectional view taken along the line -V in FIG. 4. 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 pack 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 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 pack 16 is inserted into the inner bucket, which will be 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, 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, an inner bucket 30 into which the magnetic sheet pack 16 is inserted, and an upper lid 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 top cover 32 is closed, this motor 3
The drive shaft 36 of No. 4 fits into the center hole 21 of the center core 20 of the magnetic sheet pack 16 shown in FIG. 5, and rotates the magnetic sheet 18 within the magnetic sheet bank 16 at a predetermined rotation speed.

Further, in FIG. 6, 38 is a motor for driving the magnetic head;
40 is a lead screw, 41 is a guide shaft, 42 is a head carriage that is screwed together with the solid screw 40 and is moved by the lead screw 40, and 46 is a head carriage 42 via an L-shaped hemlock 45. It is a magnetic head attached to the Therefore, when the motor 38 is rotated at predetermined rotational speeds, the head carriage 42 is moved in the axial direction of the guide shaft 41 at predetermined pinch intervals, and therefore the magnetic head 46 is moved in the radial direction of the magnetic sheet 18 (in the direction of ), and still image information can be recorded or reproduced on the magnetic sheet 18 by forming an annular or spiral trunk.

A leaf spring 5 bent into a crank shape is provided on the back side of the upper lid 32.
0.50 are provided at predetermined intervals, and this leaf spring 50.50
A regulating plate holder 52 is attached to. Regulating plate holder 5
2 has a length corresponding to approximately the entire width of the chassis 28, and as shown in FIG. There is. A groove 56 is formed in the regulation plate 54 in the direction of movement of the magnetic head 46 . On the other hand, the sixth
In the figure, a receiving bottle 58 is installed on the left side, and receiving bottles 60 and 62 are installed on the right side.

When the upper cover 32 is closed, the receiving bottles 58, 60, and 62 have their upper surfaces abutted or fitted into the elongated hole 53, holder surface 55, and round hole 57 provided in the regulating plate holder 52, respectively, and the regulating plate 5
The height of the magnetic head 4 is regulated to maintain a predetermined distance from the magnetic head 46, and accurate positioning is performed.

FIG. 7 shows the relationship between the chassis 28 and the regulating plate 54 as a terra assembly. As shown in Figure 7, the upper lid 3
2 is closed, the regulating plate holder 52 is supported by receiving pins 58, 60, 62 (receiving pins 60 are not shown), and the regulating plate 54 is held at a predetermined minute distance from the magnetic head 46. can be kept and located. That is, in a magnetic disk device, the regulation plate 54 is required to regulate the height of the magnetic head 46 with extremely high precision, and this regulation @
The height of the light receiving pin 58,60,62 is regulated with extremely high precision. Further, the position of the drive shaft 36 with respect to the magnetic head 46 is determined with high precision, and therefore, the drive shaft 36 is also set extremely strictly at a predetermined position on the chassis 28. As will be described later, in the magnetic head adjustment jig device according to the present invention,
This drive shaft 36 and receiving pins 58, 60, 62 are used as a reference for positioning the chassis 28. That is, the drive shaft 36 is used as a reference center for positioning and adjusting the chassis 28, and the receiving pins 58, 60, and 62 are used as reference heights for positioning and adjusting the chassis 28. FIG. 8 shows a magnetic head adjusting jig device according to the present invention. The schematic structure of As shown in FIG. 8, the magnetic head adjustment jig device according to the present invention includes a base 70,
A mounting jig 72 that is erected on the base 70 and supports the chassis 28 , a magnetic head holding means 74 that attracts and temporarily holds the head block 45 to which the magnetic head 46 is attached, and a magnetic head holding device 74 that holds the magnetic head with respect to the mounting jig 72 Hole direction moving means 76 that can move the means 74 in six directions; optical measuring means 78 that measures the relative position of the magnetic head 46 held by the magnetic head holding means 74 with respect to the chassis 28;
It consists of an ultraviolet irradiation device 79 for curing the magnetic gutter attachment adhesive.

First, the mounting jig 72 will be described. The mounting jig 72 is composed of an abbreviated mounting plate 80, and the lower end of this mounting plate 80 is fixed onto the base 70 with screws 82. A rectangular opening window 84 is formed in this mounting plate 72.
The magnetic head holding means 74 is located in this opening 84 so as to be movable in the direction of the hole. Further, a reference hole 86 is formed in the center of the mounting plate 8o, and a rectangular parallelepiped-shaped reference protrusion 88 is protruded below the reference hole 86. The drive shaft 36 of the chassis 28 is fitted into the reference hole 86, and the reference protrusion 88 abuts the lead screw 40 when the chassis 28 is mounted on the mounting plate 8o.
Positioning is performed in the direction of movement. This allows the magnetic head 46 to move in the radial direction through the center of the rotating magnetic sheet (the center of the drive shaft). In addition, the reference protrusion 8
8 may be brought into contact with a horizontal carriage rod 42 to regulate the direction. Also, the mounting plate 8o has three holes 90.92.
．． 94 are formed, and the aforementioned receiving pins 58, 60, and 62 are fitted into these three holes 90, 92, and 94, and the chassis 28 is arranged with a predetermined interval maintained relative to the mounting plate 80. (Figure 9). That is, FIG. 9 shows a receiving pin 62, and the receiving surface 63 of the receiving pin 62 comes into contact with the bottom surface of the hole 94 to regulate the height of the chassis 2B. Other receiving pin 58
．． 60 similarly contacts the mounting plate 80 to regulate the height.

Next, the magnetic head holding means 74 will be explained. The magnetic head holding means 74 includes an arm 96 formed in a substantially dogleg shape.
The arm 96 has a suction surface 98 at its tip.
is formed. An air suction hole 100 is formed in the center of the suction surface 98, and this air suction hole 100 communicates with a suction air passage 102 (FIG. 9). Therefore, when air is sucked from the passage 102, the head holder 45 is temporarily held on the suction surface 98. A rubber plate or the like may be adhered in advance to this suction surface 98 in order to prevent air leakage during suction. The magnetic head holding means 74 can be minutely moved in six directions by a hole direction moving means 76 which will be described later.

Next, the hole direction moving means 76 will be explained. First, base 1
04, a first sliding plate 106 that is movable in the Y direction is slidably supported. This first sliding plate 106 is biased by a spring 108, and by rotating a screw 110, the first sliding plate 106 can reciprocate the first rotating plate 124 in the Y direction. Furthermore, on this first sliding plate 106, there is a second sliding plate 112 formed in an oval shape.
is supported slidably in the Z direction. This second sliding plate 112 is biased by a spring 114,
By rotating the second adjustment screw 116, the second sliding plate 112 can be reciprocated in two directions.

A third sliding plate 118 is placed on the rising surface of the second sliding plate 112.
It is attached so that it can slide in the direction. Third sliding plate 1
18 is biased by a spring 120, and this third sliding plate 118 can be moved back and forth in the X direction by rotating the third adjustment screw 122. The third sliding plate 118 supports a first rotating plate 124 having a substantially oval shape so as to be rotatable in the θZ direction about a pin 126 . The first rotating plate 124 is connected to the shaft 12 by a spring 128.
6, and is rotated in the θZ direction by rotating the fourth rM screw 130. An abbreviated second rotating plate 134 is supported on the base plate of the first rotating plate 124 via a shaft 132 so as to be freely rotatable in the θY direction. Second
The rotating plate 134 is urged to rotate around the shaft 132 by a spring 136, and can be rotated in the θY direction by rotating the fifth adjustment screw 138. The base end of the arm 96 is connected to the second rotating plate 134 via the shaft 140 at θX.
It is attached so that it can rotate freely in the direction. The arm 96 is urged to rotate around the shaft 140 by a spring 142, and can be rotated in the θX direction by a sixth adjustment screw 144. Therefore, the suction surface 98 formed at the tip of the arm 96 has the first to sixth tll screws 110.116.122.1.
30, 138, and 144 can be moved in six directions, that is, in the X, Y, Z, θX, θY, and θZ directions.

Next, the optical measuring means 78 will be explained. Measuring means 7
8 is composed of an optical microscope. The microscope includes a main body 148, an objective section 150, and an eyepiece section 151. A revolver 152 of the objective section 150 is provided with a normal microscope lens 154, an interference microscope DI lens 156, and a mirror 158. By rotating the revolver 152, the normal lens 154, DI lens 158, and mirror 158 can be placed in a position facing the magnetic head 46 held by the attraction surface 98 of the arm 96. The focusing positions of the microscope lens 154 and the DI lens 1580 are set in advance to be at the height of the magnetic head 46. The eyepiece section 151 is provided with an image pickup tube (not shown), and the magnetic head 46 can be displayed and observed on a monitor television or the like.

Furthermore, an ultraviolet irradiation device 79 is provided on the hair 70. The ultraviolet rays emitted from the ultraviolet irradiation device 79 are reflected by a mirror 158 positioned in the direction of the magnetic head 46, and irradiate the area around the magnetic head 46 held by the arm 96 when the magnetic head 46 is bonded. In this case, as shown in FIG. 10, in addition to the mirror 158 attached to the revolver 152, a sub-mirror 160 is provided on the fixed side of the microscope, and the sub-mirror 160 irradiates the part that is not irradiated by the mirror 158. This allows the area around the magnetic head 46 to be irradiated without shadows. Sub mirror 1
The ultraviolet rays reflected by the magnetic head 60 pass through a through hole 162 formed in the arm 96 and irradiate the area around the magnetic head 46 .

The procedure for adjusting the magnetic head adjusting jig device according to the present invention configured as described above is as follows.

(11) First, the hend block 45 to which the magnetic heel 46 is attached is attracted and temporarily held by the suction surface 98 at the tip of the arm 96.

(2) Next, rotate the revolver 152 to center the DI lens 156 of the objective section 150 of the microscope at the observation position. In this state, using an interference microscope, the first, second, and 311th
By rotating the adjustment screws 110, 116, and 122, the magnetic head 46 is moved in the X, Y, and Z directions, and by roughly aligning the hexagon with the crosshair within the field of view of the microscope, the magnetic head 46 can be moved in the X, Y, and Z directions. Roughly position in the Z direction.

(3) Figure 11 shows the field of view of the interference microscope. If the gap G of the magnetic nodule 46 deviates vertically from the center of the interference fringes, tilt adjustment is required; if it deviates horizontally, Requires tilt adjustment. That is, by rotating the fifth and sixth adjustment screws 138 and 144, the magnetic head 46 is rotated in the θX (inclination) and θY (first moon direction), and the center of the interference fringe is adjusted as shown in FIG. The tilt and tilt of the magnetic head 46 are adjusted according to the head gap G.

(4) Next, rotate the revolver 152 again to set the normal microscope lens 154 to the observation position. The deviation from the horizontal cross line L1 in the field of view of the microscope shown in FIG. 12 indicates azimuth deviation, and the deviation of the head gap G from the vertical cross line L2 indicates center deviation.
is rotated to move the magnetic head 46 in the Y direction, and the fourth adjustment screw 130 is further rotated to move the magnetic head 46 in the θZ direction, and these operations cause the head end surface 46A to align with the cross. Align it so that it matches the horizontal line L1. (Alternatively, move the magnetic head 46 in the X direction by rotating the first adjustment screw 110, check the amount of deviation between the cross vertical line L2 and the head 46 on both end surfaces 46B, 46B of the head 46, and make the fourth adjustment. Adjustments are made by rotating the screw 130 to move in the θZ direction.) This allows azimuth adjustment and center shift adjustment.

(5) Next, move the magnetic head 46 in the X direction and the Y direction to align the center of the head gap G with the cross line in the field of view of the microscope, and move the magnetic head 46 in two directions by operating the adjustment screw 116. and align the magnetic head 46 to the in-focus position. Since the focus position of the microscope is set in advance at the protrusion amount position of the head 46 and the depth of focus of the microscope is extremely shallow, the protrusion amount can be accurately adjusted by adjusting to the focus position.

(6) The adjustment of the magnetic head 46 is completed as described above, and an ultraviolet curable adhesive is applied to the bottom surface of the hend block 45.

(7) In this state, insert the chassis 28 into the reference hole 86 and the pin hole 9.
By inserting the drive shaft 36 and pins 58, 69, 62 into 0.92.94, respectively, to regulate the centering and height of the chassis 28, and by aligning the reference protrusion 88 with the lead screw 40, the direction is regulated; Attach the chassis 28 to the mounting plate 80. At the time of this attachment, the head block 45 is adhered to the chassis 28.

(8) Next, rotate the revolver 152 to center the mirror 158 in a predetermined position.

(9) In this state, ultraviolet rays are irradiated from the ultraviolet irradiation device 79 to harden the adhesive.

QO) Next, stop air suction and remove the chassis 28 from the suction surface 98.

With the above operations, the adjustment of the magnetic head is completed.

In this embodiment, a case has been described in which the means for moving the magnetic head is a means for moving in the hole direction, but it is not necessarily necessary to provide a means for moving the magnetic head in the azimuth angle direction (θZ direction).

In other words, adjustments other than the azimuth angle direction can be made by microscopic observation as described above, but normally in this type of magnetic disk drive, the azimuth error is ±6.
Since very high precision is required within minutes, it is difficult to adjust the azimuth angle direction within the field of view of the microscope. Therefore, the head carriage 4 of the magnetic disk device main body 28
2 above, the azimuth adjustment mechanism of the magnetic head is installed. While reproducing the reference signal recorded on the standard sheet, the azimuth adjustment can be made accurately using the azimuth adjustment mechanism described above so that the output of the reproduced signal is maximized. It is possible to make precise azimuth adjustments.

If the magnetic disk device main body 28 has an azimuth adjustment mechanism as described above, after adjusting the near direction other than the azimuth angle direction that can be accurately adjusted, and then attaching the magnetic head to the device main body, the actual The azimuth adjustment may be made while reproducing the signal. However, even in this case, it is preferable to roughly adjust the azimuth angle direction using the magnetic gutter adjustment jig device as a step before adjusting the azimuth of the device main body.

〔Effect of the invention〕

As described above, the magnetic head adjustment jig device according to the present invention includes a mounting jig that is erected on a base and includes a support portion for the magnetic disk device main body, and a mounting jig that is erected on the base and includes a mounting jig that supports the magnetic disk device main body. A magnetic head holding means that temporarily holds the magnetic head until it is fixed, a moving means that is connected to the magnetic head holding means and moves the magnetic head held by the magnetic head holding means, and measures the relative position of the magnetic head with respect to the magnetic disk drive main body. Since it consists of a measuring means, each adjustment of the amount of protrusion of the magnetic nod, inclination angle, center shift, and tilt can be easily and accurately performed.

[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. A plan view of the bank, FIG. 5 is a sectional view of the magnetic sheet pack along the line ■-■ in FIG. 4, FIG. 6 is a perspective view of the magnetic disk device, FIG. 7 is a partial perspective view of the magnetic disk device, Fig. 8 is an overall perspective view of this embodiment, Figs. 9 and 10 are partial sectional views of this embodiment, Fig. 11 is an explanatory diagram showing the inside of the field of view of an interference microscope, and Fig. 12 is an ordinary microscope. FIG. 2 is an explanatory diagram showing the inside of the field of view. 18...Magnetic sheet, 28...Chassis,
42...Head carriage, 46...Magnetic head, 70...Base, 72...Mounting jig,
74... Magnetic head holding means, 76... Hole direction moving means, 78... Measuring means, 79... Ultraviolet irradiation device.

Claims (10)

[Claims] (1) In a magnetic head adjustment jig device 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, it is installed upright on a base and is installed on the magnetic disk drive body. a mounting jig equipped with a support part; a magnetic head holding means for temporarily holding the magnetic head until it is fixed to the magnetic disk drive main body; Three directions: the radial direction of the magnetic sheet (Y direction), the direction perpendicular to the radial direction of the magnetic sheet (X direction), the direction perpendicular to the surface of the magnetic sheet (Z direction), and the direction of the tilt angle of the magnetic head (θX direction) , tilt angle direction (θY direction)
A magnetic head adjusting jig device comprising a moving means for moving the magnetic head in two angular directions, and a measuring means for measuring the relative position of the magnetic head with respect to the main body of the magnetic disk drive. (2) The magnetic head adjustment jig device according to claim 1, wherein the support portion of the mounting jig has a reference center for positioning the magnetic disk drive main body as the driving center of the magnetic sheet. (3) The magnetic field according to claim 2, wherein the support part of the mounting jig serves as a head carriage or a guide member that guides the movement of the head carriage so that the reference plane in the moving direction of the magnetic head is used in positioning the magnetic disk drive main body. Head adjustment jig device. (4) The magnetic head adjusting jig device according to claim 3, wherein the support portion of the mounting jig has a height reference plane for positioning the magnetic disk drive main body as a receiving surface of the regulating plate holder. (5) Claim 1, wherein the magnetic head holding means has an air suction hole and attracts the magnetic head.
2. Magnetic head adjustment jig device. (6) The moving means includes a radial direction of the magnetic sheet (Y direction), a direction perpendicular to the radial direction of the magnetic sheet (X direction),
Three directions perpendicular to the magnetic sheet surface (Z direction), the magnetic head tilt angle direction (θX direction), and the azimuth angle direction (
The magnetic head adjustment jig device according to claim 1, which is movable in six directions: three angular directions: the θZ direction) and the tilt angle direction (θY direction). (7) The magnetic head adjustment jig device according to claim 1, wherein the measuring means comprises an optical microscope. (8) The magnetic head adjustment jig device according to claim 7, wherein the optical microscope is equipped with an interference microscope. (9) A mounting jig that is installed upright on the base and includes a support part for the magnetic disk drive main body, a magnetic head holding means that temporarily holds the magnetic head until it is fixed to the magnetic disk drive main body, and a magnetic head holding means. a moving means for moving the magnetic head that is connected and held by the magnetic head holding means; a measuring means for measuring the relative position of the magnetic head with respect to the magnetic disk device main body; A magnetic head adjustment jig device consisting of an ultraviolet irradiation device that irradiates ultraviolet rays. (10) The magnetic head adjustment jig device according to claim 9, wherein the optical microscope and the reflection mirror for ultraviolet irradiation can be switched by rotating a revolver of the measuring means.