JPS60124061A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To prevent the shift of position of a magnetic head on side ''1'' and to always ensure the stable transfer of information signals, by an attachment part on a fixed plate in order to secure contacts between the 1st and 2nd magnetic heads and a magnetic disk with a fixed level of pressure. CONSTITUTION:A head support arm 28 is unified with or welded to a fixed plate 31 at the rear part of the arm 28 via a plate spring 30. This spring 30 has a small elastic coefficient. A rear part 40 of the arm 28 is put on an arm support part 42 which forms a part of a base 26. The plate 31 can be fixed to the base 26 by means of screws 32a and 32b. A coil part 34 of a twisted coil spring 33 serving as an elastic matter is attached to a round rod part 35 provided to the plate 31. A free end 38 abuts on a center line 39 of the arm 28. Magnetic heads 24 and 25 of a ''0'' side 22 and a ''1'' side 23 abuts on a magnetic disk 21 with a prescribed level of pressure by the pressure of the spring 33. Furthermore those heads abuts on the disk 21 with a prescribed level of pressure even in case the disk 21 has some undulation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic head support device that can be used to support double-sided magnetic disk drives.

Conventional Structure and Problems In recent years, magnetic disks used as information recording means have become larger in capacity and smaller in size. For this reason, 11 shots of 10-kilometer disk drive glue, which is capable of recording higher-density marks, are required. As a means of making high-density records possible,
There is a way to increase the track density by decreasing the track spacing. In this case, various problems arise, one of which is position adjustment of the magnetic head in the drawing process. In a double-sided magnetic disk drive device, this position adjustment is performed by first using the magnetic spatula 1 to 1 on the 1 to 1 side of the magnetic disk (1 to 1).
Adjust the position of the magnetic t\hood that contacts the side (hereinafter referred to as the 0'' surface) and fix it.Next, the other side of the magnetic disk
The position W1 of the magnetic head that comes into contact with the side "1" is adjusted. The positional adjustment of the magnetic spatula 1: of this 4J ID II I II surface is determined by the position information signal read by the magnetic head on the side of this BJI magneto-electromagnetic disk ID 1 using the adjustment magnetic disk. , while determining the position of the magnetic head on the side of the magnetic head 1''.

But 1 ~ rack! Due to the high i degree, very high adjustment accuracy is required. If the magnetic head on the side 1'' side does not stably contact the adjustment magnetic disk,
The level of the position information signal decreases and becomes unstable, making highly accurate position adjustment difficult. Therefore, the magnetic head on the side "1' side must be supported reliably so that the magnetic head on the +J side '1' side can stably contact the adjustment magnetic disk." .

Below, with reference to the drawings, four conventional magnetic head support devices will be explained. FIG. 1a is a plan view of the claimed 11-air head support equipment, and FIG. 11 is a side view.

1 is the 1i disk, 2 is the side 0 of the magnetic disk 1.
``'' surface, 3 is the 1noid ``1'' surface of the tti magnetic disk 1, 4 is the magnetic head on the side ``1'' surface 2 side, and 5 is the magnetic head on the side ``1'' surface 3 side. 6 is a base, and the magnetic head 4 on the side "o" surface 2 is attached to the base 6 via a gimbal 7. 8 is a head support arm, and the magnetic head 5 on the side of the id '1'' surface 3 is attached to the head support arm 8 via a gimbal 9 (;
It is low t. The magnetic heads 4 and 5 on the 4J side "0'" surface 2 side and the side "1" surface 3 side are configured to face each other and cover each other, and furthermore, the magnetic heads 5 on the side "1" surface 3 side
The center of is located on the center line 19 of the head support arm 8.

The gimbal 7.9 is a plate spring with a plate thickness of 50 to 100 μm and a small elastic modulus, and the magnetic heads 4.5 on the side '0'°2 side and the side '1°' side 3 prevent warping of the magnetic disk. It has a degree of freedom that allows it to follow undulations caused by bending. Reference numeral 10 denotes a leaf spring, which is integrally formed with the head support arm 8. The leaf spring 10 has a thickness of 50 to 100 μm and has a very small elastic modulus. A fixing plate 11 is fixed to the base 6 by screws 12a and 12b while holding down the leaf spring 10. 13 is a torsion coil spring as a bullet 1),
The coil part 14 is a round bar part 1 which is pulled on the base 6.
Attached to () 5. [Torsion] The fixed end 16 of the spring 13 is fixed to the rear sloped part 17 of the base 6, and the free end 18
is in contact with the head support arm 8 from the center line 19-1. Due to the spring pressure of the torsion coil spring 13, the
Magnetic heads 4, 5 on side 2 side and side 1 side 3 side
contacts the magnetic disk 1 with a predetermined pressure, and even if the magnetic disk 1 undulates, the gimbal 7.9
Due to its degree of freedom, it can follow the undulation and contact the magnetic disk 1 with a predetermined pressure.

FIG. 2 is a side view showing the state of the conventional magnetic head support device during unloading. When inserting or removing the magnetic disk 1 from a magnetic disk drive device, as shown in FIG.
lifted up defiantly. At this point, the plate 1aiO is bent with one end fixed by the fixing plate 11, and the head support arm 8 is attached to the magnetic head 5 on the side II I11 surface 3 side.
The side to which the magnetic disk is attached is tilted by -1, and the magnetic head 5 on the side 1' surface 3 is released from contact with the magnetic disk 1.

In the magnetic head support device configured as described above, the position of the magnetic head 5 on sides 1'' and 3 in the assembly process can be adjusted by loosening the screws 12a and 12b in FIG. 1 and moving the head support arm 8 in the horizontal direction. It is set in a movable state, and position information signals are read from the adjustment magnetic disk 1 by the magnetic heads 5 on sides "1" and 3, and adjustment is performed by moving the head support arm 8 while determining the position.

After the adjustment is completed, the screws 12a and 12b are tightened, and the plate spring 10 is pressed onto the base 6 by the fixing plate 11, thereby fixing the magnetic head 5 on the side 1'' surface 3 side.

Here, the thickness of the leaf spring 10 that is integrally constructed with the head support arm 8 is very small at 50 to 100 μm, and the elastic modulus is in the bending/j direction and fF torsion it direction J1.
Since the plate spring 10G is small in size, when the head support arm 8 moves, the plate spring 10G is easily twisted when the Ir11 rotation about the center line 19 of the head support arm 8 acts. In order to move the head support arm 8 in some direction v1, a moving horn is added to the head support arm 8, so that the head support 1. 'J7' - A rotational moment 1- related to the centerline 19 of the arm 8 is likely to occur, but if a rotational moment related to the centerline 19 occurs, the head support arm 8 will also rotate due to the screw of the leaf spring 10 and JL. rotationally displaced around
The horizontal state cannot be maintained. At this time, the head support arm 8
The gimbal 9 attached to the magnetic disk 1 is deformed so that the magnetic heads 5 on sides 1 and 3 come into vertical contact with the side 1 of the magnetic disk 1. However, if the magnetic disk 1 is undulated, In some cases, the gimbal will deform further,
However, the amount of deformation is sufficient to 4<, 1 noid''
It is impossible for the magnetic head 5 on the 1'' and 3 side to sufficiently follow this undulation and come into contact with the magnetic disk. Also, the torsion = 1 ile spring 13 is attached to a circular
7- When the head support arm 8 is moved in the horizontal direction, the spring 1
The free end 18 of 3 moves from above the centerline 19 of the head support arm 8, resulting in a rotational moment 1~ about the centerline 19 of the head support arm 8. Therefore, the primary id "1'"
In adjusting the position of the magnetic head 5 on the side 3, the head support arm 1-. The horizontal state (j) of 8 is not maintained, and the magnetic head 5 on the 1u surface 3 side sufficiently follows the waviness of the adjustment magnetic disk 1 (2ii), and the level of the position information signal decreases. It becomes unstable, and it is difficult to make a highly accurate 1N adjustment.

Further, as shown in FIG. 2, the leaf spring 10 has one end attached to a fixed plate 1.
Since it bends upward while being fixed by 1, the torsion of the magnetic head 5 on the side 1 and 3 is greater than when the magnetic head 5 is loaded.
A force in the direction of the bottom due to the spring pressure is applied to the plate spring 10, but since the leaf spring 10 is forcibly bent upward by being held by the head support arm 8, a large stress is generated in the leaf spring 10. . Therefore, when loading and unloading are repeated, the leaf springs 8 and 6 undergo plastic deformation due to this large stress.

When the leaf spring 10 is plastically deformed, the magnetic head 5 on the side "1" surface 3 will be displaced from the predetermined position during loading.
The level of the information signal read from the magnetic disk 1 by the magnetic head 5 on the side '1'' surface 3 decreases, and if it deviates even further, reading becomes impossible.

OBJECTS OF THE INVENTION An object of the present invention is to facilitate highly accurate position adjustment of the magnetic head on the side "1" in a double-sided magnetic disk drive device, and furthermore, to facilitate highly accurate position adjustment of the magnetic head on the side "1".

A magnetic head support device is provided that prevents the position of the magnetic head on the side "1" from shifting even when the magnetic head on the side "1" is repeatedly loaded and unloaded, and enables stable transmission and reception of information signals at all times. It is to provide.

Structure of the Invention In order to achieve the above-mentioned object, the magnetic head support device of the present invention includes a head support arm having a first magnetic head having a fixing plate integrally molded or fixed via a leaf spring. , a second magnetic head is fixedly provided on the base, and an arm support part that simply supports the rear part of the head support arm is provided on the base;
A slotted portion of an elastic body is stepped on the fixed plate for bringing the first magnetic head and the second magnetic spatula 1- into contact with the magnetic disk with a constant pressure. This makes it possible to easily adjust the position of the second magnetic head with high accuracy compared to the conventional magnetic head support uF/J.

Furthermore, the present invention provides a curved surface section at the rear end of the head support arm having the first magnetic head, and the first magnetic head is mounted on a plate that can be deformed along the curved surface section of the head support arm. A fixing plate, on which a spring is integrally molded or fixed, and which simply supports the curved surface portion of the head support arm, is provided so as to be fixable to a base having a second magnetic head, and A mounting portion of an elastic body is provided on the fixing plate to bring the head and the second magnetic head into contact with the magnetic disk with a constant pressure, and the contact between the head support arm and the base is By eliminating 10=, the position of the second lli & qi head can be adjusted with even higher precision at C' of the IJ, which becomes the river surface.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to Figure-C1. FIG. 3 shows the structure of a magnetic head support device I'J according to an embodiment of the present invention, and FIG. 3A is a plan view thereof, and FIG. 3A is a side view thereof. In Figure 3, 21
1;, qi disc on L acupuncture needle, 22 is side ``O'' surface of magnetic eye disc 21, 23 is ``, f'' of I6 qi disc 21;
side "1" side, 241; L IJ coil "O"
``Surface 22 side''/) r4 is the air head, 25 is the magnetic head on the 1j id ``1'' side and 23 side. 26 is the base, 1'' id ``o°' side 2 side 2 side air head. 24 is attached to the base 26 via a gimbal 27. 28
is a head support arm, and the magnetic head 2!il on the sides 1'' and 23 is connected to the head support arm 28 via the gimbal 29.Side rr Orr
The magnetic heads 24 and 25 on the surface 22 side and the τf side 111 II and surface 3 side are configured to face η, and the center of the magnetic head 25 on the side +11 II surface 2 side is the center of the head support arm 28. It is located at line 3942 -11-. Gimbal 27.29 is thicker than 1! -I(1-
10 (lIlln) is a leaf spring with a small elastic modulus.
The magnetic heads 24 and 25 have such a degree of freedom that they can follow the undulations caused by the warping or bending of the magnetic disk. The head support arm 28 is integrally molded or attached to a fixing plate 31 via a leaf spring 30 at the rear.
The plate spring 30 has a plate thickness of 50 to 100 flTrL and a small elastic modulus.

Further, a rear portion 40 of the head support arm 28 rests on an arm support portion 42 forming a part of the base 26. The fixing plate 31 can be fixed to the base 26 by means of the springs 32a and 32b. Reference numeral 33 denotes a torsion T1 spring as a bullet v1 body, and its ] coil portion 34 is attached to a round bar portion 35 provided on the fixed plate 31. Torsion coil spring 33
The fixed end 36 of is fixed to the slope portion 41 of the fixed plate 31. The free end 38 is aligned with the centerline 39 of the head support arm 211.
It is in contact with the top. Due to the spring pressure of the torsion coil spring 33, the magnetic heads 24, 254 on the side O'' surface 22 side and the sides 1'' and 23 are pressed against the magnetic disk 21 with a predetermined pressure.
Even if the magnetic disk 21 has a rough undulation of -12-, the cymbals 27 and 29 have J degrees of freedom, follow the undulation of the grooves, and can contact the magnetic disk 21 with a predetermined pressure.

In the magnetic head support device of this embodiment configured as J, the magnetic head 2 on the 1J-id 1'' surface 23 side!
Since I is constructed integrally with the head 1, the i-arm 28, the plate 4D30, and the fixing plate 31, the adjustment of the magnetic head 25 on the side 1'' surface 23 is done using the screw 32a.
, 3211, and move the fixing plate 31 in the horizontal direction while pressing it against the base 26+. By kneading, it is avoided to apply a direct force to the head support arm 28, and the rotational moment l-t about the center line 39 of the spatula 1 to 28 is not applied.

Mar, :, Torsion': X1 Ilbawa 33 is fixed] k31
The head support arm 28 is attached to the round bar part 35, and its fixing @36 is also fixed to the slope part 41 of the fixing plate 31.
1 is constructed in one piece (there is one, so the fixed plate 31 is connected to the water 1!
Free end 3 of the spring 33
8 is in contact with and connected to the center line 39 of the head support arm 28 [
jru. Therefore, the rotational moment 1 due to the spring pressure of the torsion coil spring 33 with respect to the center line 39 does not act on the head support arm 13-2B. Therefore, the spring 30, which has a small plate thickness of 50~i, oo7zm and a small elastic modulus, will not be twisted, and even when changing the position of the magnetic head 25 on the side "1" and 23 side, the head support arm 28 will remain horizontal. The condition will be maintained. Furthermore, since the rear part 40 of the head support arm 28 rests on the arm support part 42 of the base 26, the horizontal state of the head support arm 28 can be maintained more reliably.

As described above, when adjusting the position of the magnetic head 25 on the side 1'' surface 23 side, the horizontal state of the head support arm 28 is reliably maintained, and furthermore, the horizontal state of the head support arm 28 is reliably maintained on the side 11111 surface 23 side attached to the head support arm 28 via the gimbal 29. The magnetic head 25 contacts the adjusting magnetic disk 21 with a predetermined pressure while fully following the undulations of the adjusting magnetic disk 21.Therefore, the magnetic head 25 on the side 1° surface 23 contacts the adjusting magnetic disk 21 with a predetermined pressure. The position information signal read from the disk 21 is stable at a certain level, and the position information signal read from the disk 21 is stable at a certain level.
It is possible to easily perform highly accurate position adjustment while accurately determining the position of the magnetic head 25 on the third side. Please refer to drawing 5 for + example (:)
7j Shinano] (9 to explain, Figure number 14, 1): J,' Ml+Example (Magnetic head support device 4 shown in J2), Fig. 1 fl angled plane Figure, Figure 4+
Side view of 11J - 1, ; complete) 4 [λ1, component 11, constructed in the same manner as in Fig. 3, E; 1 Fig. 33 and 1 of H! (Hold with a bow, 51.
・7/Explanation-6 regarding the constituent elements in 1-);
6 o '\tsu 1 - Curved surface part 4 at the 1 end of the support arm 28
3.Install the curved part A of the head support arm 28.
3 TJ Board Pone 305f11. / C fixed person 31-1
− is supported by

FIG. 5 shows the ant T, i-t' of the magnetic head 25 on the side "1°" surface 23 of the head support device N shown in FIG.
1. ! It is a side view showing J. In FIG. 5, the curved surface portion 43 of the head support arm 28 rests on the fixed plate 31 via the plate spring 3 (), and the plate spring 30 is
The deformation occurs along the curved surface portion 43 of the hand support arm A28.

In the magnetic head support device configured in this way, 1
J ID 11111 side 23 side mouth 1 ki hetsu 1:25 (ζ
11 is adjusted with the fixing plate 31 pressed against the base 26, since the head support arm 28 is constructed integrally with the leaf spring 30 and the fixing plate 31.

Note that in the embodiment shown in FIG. Therefore, a frictional force acts on the head support arm 28, and the plate spring 30, which is integrally formed with the head support arm 2B, is slightly bent in the 1-to-easy direction due to this frictional force.Therefore, the fixed plate 31 is stopped]. As a result, it takes some time for the deflection of the spring 30 in the track direction to recover, and the position of the magnetic head 25 on the king's room side 1'' and 23 changes slightly. The information signal from the leaf spring 30 causes the head support arm to bend over.However, since the horizontal state of the head support arm 28 is maintained, the leaf spring 30
When the deflection of the signal 112 is recovered, the level of the information signal becomes stable. Therefore, there is no problem with the N-magic adjustment.

In this embodiment, the curved surface portion 43 of the tit head support arm 28 rests on a fixed plate 31 via a leaf spring 30, and the fixed plate 31 moves together with the head support arm 28.
16- Therefore, the total frictional force (;
1 Does not work. Therefore, the leaf spring 30 does not bend, and information is transmitted from the adjusting fi&air disk 21.
``J1,) is always stable at a constant 1 novel.From 1, the position adjustment of the mouth air head 25 on the side of the side 1° plane 23 can be performed quickly and with high precision. .

In addition, in FIG. 5, when the magnetic head 25 on the lead "1" surface 23 side is unloaded, the head support arm 2
The curvature of the curved surface part 43 of 8 is 1 (the root bone 3 is
Since the deformation state of 0 can be defined, the radius of curvature of the curved surface portion 43 can be determined so that the leaf spring 30 always deforms within the elastic range. Further, the curved surface portion 43 is connected to the fixed plate 3 via the leaf spring 30.
1, the large stress due to the spring pressure of the torsional spring 33 will not be applied to the leaf spring 30. Therefore, plastic deformation of the leaf spring 30 due to repeated loading and unloading of the magnetic head 25 on the side "1° and 23" does not occur, and the plastic deformation of the leaf spring 30 does not cause the side "1"
Therefore, it is possible to prevent the position and r deviation of the magnetic head 25 on the 23 side in the track direction.

Effects of the Invention-17 = It is clear from the explanation below-L; In the magnetic head support device of the present invention, the head support arm is integrally molded or fixed with the fixing plate via a plate spring. , the rear part of the head support arm rests on the arm support part formed by a part of the base, and
An elastic body is attached to the fixing plate to bring the magnetic head on the other side into contact with the magnetic disk with a constant pressure, so the position of the magnetic head on the side 1'' side can be easily adjusted. An excellent effect can be obtained in that it can be performed with 1σ. Therefore, the side 1' included in the assembly process
The time required to adjust the position of the magnetic head on the ° side can be significantly shortened, and the cost of a magnetic disk drive device capable of higher density recording can also be reduced.

Furthermore, the magnetic head support device of the present invention is provided with a curved surface section at the rear end of the head support arm, and a leaf spring that deforms along the curved surface section when unloading the magnetic head on the side ``1'' side. In addition, by placing the curved portion on the fixed plate via a leaf spring, it is possible not only to quickly and accurately adjust the position of the magnetic head on the side of the sensor 18-id 1'', but also to Side 1
Side 11, which occurs due to plastic deformation of the leaf spring due to repeated loading and unloading of the magnetic head on the ``'' side.
Preventing the positional deviation of the magnetic head on the l11 side in the 1-to-rack direction has the effect of increasing the rlJ performance, and the reliability of the magnetic disk drive device can be improved.

[Brief explanation of the drawing]

1a and 1) are a plan view and a side view of a conventional magnetic head support device, FIG. 2 is a side view showing the magnetic head device of FIG. 1 during unloading, and FIG. 3a. 4b is a plan view and a side view of a magnetic head support device according to an embodiment of the present invention, and FIGS. 4A and 4H are a plan view and a side view of a magnetic head support device according to another embodiment of the present invention. , 5th
This figure is a side view showing the head unloading n and 't of the magnetic head support device in FIG. 4. 21... Magnetic disk, 22... Side "'0" surface of magnetic disk, 23... Side "1" of magnetic disk
'' side, -19- 24... Side ゛'0 side magnetic head, 25...
・Magnetic head on side 1-11111 side, 26...Base, 27.29...Gimbal, 28...Head support arm, 3()...Plate spring, 31...Fixing plate, 32
a, 32b...Screw, 33...Torsion coil spring (elastic body), 42...Arm support portion, 43...Curved surface portion agent of head support arm Yoshihiro Morimoto-20~

Claims (1)

[Claims] 1. A fixing plate on which a head support arm having a first magnetic head is integrally molded and fixed via a leaf spring can be fixed to a base having a second magnetic head. an elastic body for causing the first magnetic head and the second magnetic head to contact the magnetic disk with a constant UF force; To install the head support device, place the part on the fixing plate. 2. A curved surface portion is provided at the rear end of the head support arm having the first magnetic head, and a leaf spring that is deformable along the curved surface portion of the head support arm when the first magnetic head is unloaded is integrally provided. A fixing plate which is molded or fixed and which purely supports the curved surface portion of the head support arm via the plate spring is provided so as to be fixable to the base having the second magnetic head. The first air head and the second magnetic head are brought into contact with each other under a certain pressure.
'J section is set on the fixing plate] - (: Jl, = magnetic support part ?0