JPS62277675A - Attachment structure for magnetic head - Google Patents

Abstract

PURPOSE:To improve the attachment accuracy of a magnetic head by attaching an attachment tool holding a head attachment plate where a magnetic head is welded to a head carriage and applying an adhesive at both sides of the head attachment plate to attach the head attachment plate to the head carriage. CONSTITUTION:An azimuth adjustment plate 64 is attached rotatably onto a head carriage 42 via a pin 66 and this pin 66 is set at the lower side of the gap center of a magnetic head 46. Then an azimuth adjustment is carried out by turning the plate 64 around the pin 66. The head 46 is attached to an end of a head attachment plate 45 and an attachment hole 45B is formed on a base part 45A of the plate 45. The plate 45 is attached to the plate 64 by pressing an attachment pin 68 into the hole 45B and a hole part 64B of the plate 64. Under such conditions, the plate 45 can perform the fine adjustment of the azimuth, the shift value, etc. of the head 46.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a mounting structure for a magnetic head, and particularly relates to a magnetic head mounting structure used in a magnetic recording or reproducing device such as an electronic camera. Regarding the head mounting structure.

[Background of the invention]

Recently, subjects have been photographed and rotated purely electronically by combining a single imaging device such as a solid-state image sensor or an image pickup tube with a recording device that uses a magnetic sheet that is inexpensive and has a relatively large storage capacity as a recording medium. Electronic camera systems have been developed in which images are recorded on a magnetic sheet and reproduced 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 relative to the magnetic sheet: (1) protrusion amount, (2) tilt angle, (2) center shift, (2) azimuth shift, and (2) tilt. Of these, (2) tilt angle and (2) tilt, if they are minute, can be dealt with only by head aging without adjustment. Figures 9 to 11 below
These five adjustments will be sequentially explained according to the diagram.

In FIG. 9, 10 is a magnetic sheet, 12 is a magnetic head that performs recording or reproduction on the magnetic sheet 10, and 14
is a regulating plate that is provided at a position facing the magnetic head 12 with the magnetic sheet 10 in between, and aligns the magnetic sheet 10 with the magnetic head 12.

The magnetic head 12 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. be.

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. 9, the amount of deviation Eb of the magnetic head 12 from the center of the magnetic sheet 10 and the azimuth deviation θ as shown in FIG.
Furthermore, as shown in FIG. 11, the tilt angle θC of the magnetic head with respect to the magnetic sheet 10 must be within a predetermined compatible range.

By the way, in the conventional magnetic head mounting structure, as shown in FIG. 12, a plurality of shims 76 of different thicknesses are interposed on the carriage 42 to hold the L-shaped head mounting plate 45 to which the magnetic head 46 is attached in advance. After adjusting the height, the L-shaped head mounting plate 45 was mounted on the head carriage 42 with adhesive. However, in the conventional magnetic head mounting structure, since the L-shaped head mounting plate 45 and the head carriage 42 are in surface contact, if the thickness of the adhesive layer exceeds 100 μm, temperature changes or shrinkage during curing may occur. The position of the magnetic head 46 may be misaligned due to the influence of the change.

Another problem is that it takes a very long time to adjust the thickness of the entire shim 76 in order to control the thickness of the adhesive layer.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a magnetic head mounting structure that can improve the mounting accuracy of the magnetic head by reducing the dimensional change when the adhesive layer is cured. It is an object.

[Summary of the invention]

In order to achieve the above object, the present invention provides a mounting structure for 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. The head mounting plate is attached to the head carriage by attaching a fixture for holding the head mounting plate to the head carriage, and by pouring adhesive onto both sides of the head mounting plate.

〔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. 1 shows a plan view of a magnetic sheet pack used in a magnetic recording or reproducing device such as an electronic camera, and FIG. 2 is a sectional view taken along line A--A in FIG. As shown in FIG. 1, the magnetic sheet pack 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 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 packet described later, and the magnetic sheet pack 16 is inserted into the inner packet. Then, the shutter 26 moves downward in FIG. 1 to open the head window 24, making it possible to record and reproduce information on the magnetic sheet 18.

In FIG. 3, a magnetic recording or reproducing device is shown, and the magnetic recording or reproducing device is composed of a chassis 28, a packet 3o into which a magnetic sheet pack 16 is inserted, and an upper M32. 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 I 32 is closed, the drive shaft 36 of this motor 34 is connected to the magnetic sheet pack 16 shown in FIG. The magnetic sheet pack 16 is inserted into the center hole 21 of the center core 20.
The magnetic sheet 18 is rotated at a predetermined number of rotations. Further, in FIG. 3, numeral 38 is a motor for driving the magnetic head, 40 is a lead screw, 41 is a guide shaft, and 42 is a head carriage that is moved by the screw 40 which is threadedly engaged with the lead screw 40. 45 is a head mounting plate, and a magnetic head 46 is attached to this head mounting plate 45. Therefore, when the motor 38 is rotated at a predetermined number of revolutions, the head carriage 42 is moved by a predetermined pinch in the axial direction of the guide shaft 41. Along with this, the magnetic helad 46 moves in the radial direction of the magnetic sheet 18,
Still image information can be recorded or reproduced by forming annular or spiral tracks on the magnetic sheet 18.

Leaf springs 50.50 are provided at predetermined intervals on the back surface of the top 132, and a regulating plate holder 52 is attached to the leaf springs 50.50. The regulating plate holder 52 has a length corresponding to approximately the entire width of the chassis 28, and furthermore, the regulating plate holder 52 has a third
As shown in the figure, a regulation plate 54 is provided at a position facing the magnetic head 46 when the top cover 32 is closed. A groove 56 is formed in the regulation plate 54 in the direction of movement of the magnetic head 46 . On the other hand, on the left side of the chassis 28 in FIG.
8 is planted, and on the right side, pins 60 and 62 are planted. When the top cover 32 is closed, the pins 58, 60, and 62 abut or fit into the elongated hole 53, holder surface 55, and round hole 57 provided in the regulating plate holder 52, respectively, so that the regulating plate 54 is connected to the magnetic head. The height is regulated to maintain a predetermined distance from 46, and accurate positioning is performed.

A pin (not shown) is arranged on the magnetic sheet pack 16 holder, and the magnetic sheet 18 attached to the drive shaft is connected to the pack 16.
Rotates within the pack 16 without touching.

The mounting structure of the magnetic head according to the first embodiment will be explained based on FIG. 4. The azimuth adjustment plate 64 is
It is rotatably mounted on the head carriage 42 via. The pin 66 is located below the gap center of the magnetic head 46, and the azimuth adjustment is performed using the azimuth adjustment plate 6.
4 around the pin 66.

At one end of the head mounting plate 45, the magnetic head 4 is mounted as described above.
6 is attached, and a mounting hole 45 is formed in its base 45A.
B is formed. The head mounting plate 45 is attached to the azimuth adjustment plate 64 by press-fitting a mounting pin 68 into the mounting hole 45B of the head mounting plate 45 and the hole 64B of the azimuth adjustment plate 64. The head mounting plate 45 is configured to allow fine adjustment of the azimuth, displacement amount, etc. of the magnetic head 46 in this state.

Then, the flange 68A of the mounting pin 68 and the head mounting I
tyi 45 and between the head mounting plate 45 and the azimuth adjustment plate 64, an adhesive 70 is applied, respectively. The adhesive 70 is adapted to fix the finely adjusted head mounting plate 45 of the magnetic head 46 to the azimuth adjustment plate 64. As a result, the head mounting plate 45 is fixed onto the head carriage 42 via the azimuth adjustment plate 64. After the head mounting plate 45 is fixed, the azimuth adjustment plate 64 is fixed on the head carrier ridge 42 by a pin (not shown). That is, the magnetic head 46 is fixed on the head carriage 42 via the head mounting plate 45, the mounting pin 68, and the azimuth adjustment plate 64 in this order.

Next, the mounting structure of the magnetic head configured as described above is as follows.
First, the azimuth adjustment plate 64 is connected to the azimuth adjustment bin 66.
It is mounted on the head carriage 42 via. Next, approximately half of the mounting pin 68 is press-fitted into the mounting hole 45B of the head mounting plate 45, and a clearance L1 is formed between the head 68A of the mounting pin 68 and the head mounting plate 45. Later, the displacement amount, tilt angle, etc. of the magnetic head 46 fixed to the head mounting plate 45 are adjusted using an adjustment jig device (not shown).

Then, the tip of the mounting pin 68 is connected to the azimuth adjustment plate 6.
The head mounting plate 45 is press-fitted into the hole 64B of 4.
is preset with a clearance L2 on the azimuth adjustment plate 64.Furthermore, in the magnetic head mounting structure of the first embodiment, the azimuth angle of the magnetic head 46 on the head mounting plate 45 is finely adjusted, and the clearance L2 is then preset on the azimuth adjustment plate 64. , and L
Apply adhesive 70 to 2. The adhesive 70 fixes the head mounting plate 45 to the azimuth adjustment plate 64. Then, the azimuth adjustment plate 64 is fixed onto the head carriage 42 via a pin (not shown). That is, the head mounting plate 45 is fixed onto the head carriage 42 via the azimuth adjustment plate 64. At this time, since the adhesive 70 is applied to the clearances L and L2, an adhesive layer 11.2□ is formed with the head mounting plate 45 in between. Therefore, the adhesive layer 12 contracts and pulls the head mounting plate 45 toward the head carriage 42, while the adhesive layer j2. The re-adhesion layer 1. pulls the head mounting plate 45 toward the flange 68A of the pin 68 due to contraction. ．． The shrinkage forces of adhesive layer 1.12 cancel each other out. , l□ decreases as a whole. In addition, adhesive layer 1. , l, are equidistant, they cancel each other out and the magnetic head 46 does not move.

Therefore, in the magnetic head mounting structure according to the present invention, after the head mounting plate 45 is mounted on the head carriage 42,
It will not shift or tilt due to shrinkage of the adhesive 70. As a result, the magnetic head 46 can be accurately positioned on the head carriage 42.
fixed on top.

Next, the magnetic head mounting structure according to the second embodiment will be described with reference to FIG. 5. The magnetic head mounting structure is provided with a mounting tool 72 having a U-shaped cross section. Mounting tool 72
The outer side of the negative side plate 72A is fixed onto the head carriage 42 by brazing or the like. The base 45A of the head mounting plate 45 is connected to the side plates 72A of the fixture 72,
It is inserted in parallel between 72B. The base portion 45A of the head mounting plate 45 inserted into the fixture 72 is fixed to the inside of the fixture 72 with an adhesive 70 on both sides and at its tip.

The mounting structure of the magnetic head of the second embodiment is as follows:
The base 45A of the head mounting plate 45 is inserted parallel to the inside of the head mounting plate 45. At this time, the base 45A of the head mounting plate 45 and both side plates of the fixture 72? Clearance Lz between 2A and 72B
, Ll are formed. Next, adhesive 70 is poured into the clearances L2 and Ll, and the base 45 of the head mounting plate 45 is
A is placed inside the fixture 72.

The mounting structure of the magnetic head of the second embodiment is similar to the first embodiment, in which adhesive layers are sandwiched between the base portion 45A to form 12, and the head mounting plate 45 is fixed to the fixture 72. Layer 1. ．． The contraction forces of 12 cancel each other out, so that the head mounting plate 45 does not shift or tilt due to contraction of the adhesive layer.

In addition, in the magnetic head mounting structure of the second embodiment, the sixth
As shown in the figure, one side 72C between the side plates 72A and 72B may be fixed to the head carriage 42, and the head mounting plate 45 may be supported in the vertical direction in the figure.

Next, a magnetic head mounting structure according to a third embodiment will be explained. FIG. 7 is a plan view showing a magnetic head mounting structure according to the third embodiment, and FIG. 8 is a sectional view taken along the line 1--2 in FIG. In this magnetic head mounting structure, an azimuth adjustment plate 74 bent into an abbreviated shape is rotatably provided on the head carriage 42 via a pin 66, and an end portion of the azimuth adjustment plate 74 is provided with an approximately U-shape. A shaped mounting portion 74B is provided.

On the other hand, the head mounting plate 45 is formed into a substantially U-shape, and a magnetic head 46 is attached to one end, and the other end 45C
are inserted in parallel and equidistantly into the mounting portion 74B of the azimuth adjustment plate 74.

The other end side 45C of the head mounting plate 45 has an adhesive layer 11 on both sides.
12 is formed and fixed inside the mounting portion 24B of the azimuth adjustment plate 74 as in the second embodiment. The azimuth adjustment plate 74 is fixed on the head carriage 42 as in the first embodiment shown in FIG. 4.

The magnetic head mounting structure of the third embodiment is a combination of the first embodiment shown in FIG. 4 and the second embodiment shown in FIGS. 5 and 6. Adhesive layer 1. ．． 12 is formed, the adhesive layer 1. , f
, and cancel each other out, so that the head mounting plate 45 does not tilt after being set, and the magnetic head 46 is accurately mounted on the head carriage 42.

〔Effect of the invention〕

As explained above, according to the magnetic head mounting structure according to the present invention, the head carriage is provided with a fixture that holds the head mounting plate to which the magnetic head is fixed, and adhesive is poured onto both sides of the head mounting plate. Since the head mounting plate is fixed on the heel ridge via the fixture, an adhesive layer is formed on both sides of the head mounting plate, minimizing shrinkage due to hardening and improving the mounting accuracy of the magnetic head. You can improve your performance.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the magnetic sheet pack, FIG. 2 is a sectional view taken along line A-AvA in FIG. 1, FIG. 3 is a perspective view of the magnetic disk device, and FIG. 4 is a first embodiment of the present invention. 5 is a sectional view showing a magnetic head mounting structure according to the second embodiment; FIG. 6 is a sectional view showing a modification of the magnetic head mounting structure according to the second embodiment; FIG. 7 is a sectional view showing the mounting structure of a magnetic head according to the third embodiment;
FIG. 8 is a cross-sectional view taken along the line ■-■ in FIG. 7, FIG. 9 is an explanatory diagram showing the protrusion amount and inclination angle of the magnetic head, and FIG. 10 is an explanatory diagram showing the center deviation and azimuth deviation of the magnetic head. , 1st
FIG. 1 is an explanatory view showing the tilt, and FIG. 12 is a sectional view of a conventional magnetic head mounting structure. 18...Magnetic sheet, 42...Head carriage'', 45...Head mounting plate, 45B...Mounting hole, 46...Magnetic head, 64.74...Azimuth adjustment plate, 68...・Mounting pin, 70...
Adhesive, 72...Mounting tool, 74B...Azimuth adjustment plate mounting part. Figure 3 Figure 4 Actual 52 fi2/? A Figure 6 2C Figure 7 Figure 8 Figure 66 74A Figure 9 Mouth Figure 10 Figure 11 Figure C

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, a mounting structure in which a head mounting plate to which a magnetic head is fixed is sandwiched is used. A magnetic head mounting structure characterized in that a tool is attached to the head carriage, and the head mounting plate is attached to the head carriage by pouring adhesive on both sides of the head mounting plate.