JP2955782B2 - Structure and method for fixing magnetic head to carriage arm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, in which a rear end of a spring arm having a read / write head at a front end is provided in a comb shape on a carriage which is rotationally driven by a voice coil motor. The present invention relates to an improvement in a structure in which a pair of carriage arms are fixed to respective distal ends.

[0002]

2. Description of the Related Art FIG. 5 is a plan view schematically showing the inside of a conventional general magnetic disk drive, FIG. 6 is a schematic side sectional view of FIG. 5, 6 is a magnetic disk drive, and 6a is a case. Each component constituting the magnetic disk device as described below is mounted. That is, reference numeral 7 denotes a spindle which is rotationally driven by a spindle motor 8, and seven magnetic disks 9 are mounted on the spindle at predetermined intervals in this example. A carriage 10 is rotatably driven by a voice coil motor 11. Six carriage arms 12 are provided in the space between the magnetic disks 9 in a comb shape. The rear ends 14a, 14a of the spring arms 14, 14 'having the read / write heads 13, 13' fixed to the front end.
The pair of read / write heads 13 and 13 'seeks the facing surface of the magnetic disk 9 mounted on the spindle 7 at a predetermined interval.

The voice coil motor 11 comprises permanent magnets 11a, 11a and a movable piece 1 rotatably disposed between the permanent magnets 11a, 11a and fixed to a carriage 10.
0a, and read / write heads 13, 13 '.
Are formed by a movable coil 11b for supplying a control current when seeking the opposing surface of the magnetic disk 9. A convex piece 10b is formed at the rear end of the movable piece 10a, and the convex piece 10b rotates in a range where the convex piece 10b contacts the stoppers 11c, 11c.

[0004] The read / write heads 13 and 1 are attached to the tip of each carriage arm 12 provided in a comb shape on a carriage 10 which is rotated and driven by a conventional voice coil motor 11.
FIGS. 7 to 10 show a structure for attaching rear ends of spring arms 14 and 14 'to which 3' is fixed. That is, as in the first example shown in a plan view in FIG. 7 and a side sectional view in FIG.
A spring arm 14, to which the heads 13, 13 'are fixed,
The rear ends 14a, 14a 'of 14' are attached to the front end 12a of the carriage arm 12 by directly tightening the screws 15.

Further, as shown in a plan view of FIG. 9 and a sectional side view of FIG. 10, a spring arm 14, 1 with a read / write head 13, 13 'fixed to the tip end.
4 'at the rear ends 14a, 14a'
It is directly attached to the tip portion 12a of the second member 12 by swaging 16.

[0006] As shown in FIGS.
The rear end 12b of each carriage arm 12 to which the rear ends 14a, 14a 'of the spring arms 14, 14' to which the write heads 13, 13 'are fixed is attached to the carriage 10 as shown in FIG. It is inserted into the insertion holes 10c drilled at intervals and fixed.

[0007] As shown in FIG. 12, a distal end portion 12a of each of the carriage arms 12 integrally formed in a comb shape with a carriage 10 which is driven to rotate by a voice coil motor,
When attaching the rear ends 14a of the spring arms 14, 14 'to which the read / write heads 13, 13' are fixed, the spring arms 14 and 14 'are attached to the mounting holes 12c formed in the distal end 12a of the carriage arm 12 from both sides. Arm 1
The cylindrical projections 14b, 14b 'formed at the rear ends 14a, 14a' of the spring arms 14, 14 'are inserted, and the rear ends 14a, 14a' of the spring arms 14, 14 'are temporarily fixed. A spacer 17 having a through hole 17a at a position corresponding to the cylindrical projections 14b, 14b 'is interposed between the distal end portions 12a of the carriage arm 12, and thereafter, from the distal end portion 12a of the uppermost carriage arm 12, The caulking member 18 is moved to the rear end 14 of the spring arms 14 and 14 '.
a, 14a 'are successively inserted into the cylindrical projections 14b, 14b' and through holes 17a of the spacer 17, and the cylindrical projections 14b, 14b 'are caulked to form the rear ends of the spring arms 14, 14'. The portions 14a and 14a 'are fixed to the leading end 12a of each carriage arm 12. Thereafter, the caulking member 18 and the spacer 17 are removed.

Further, as shown in FIG. 14, a lead / lead is provided at the tip of each carriage arm 12 which is integrally formed in a comb shape on a carriage 10 which is rotated and driven by a voice coil motor.
When attaching the rear ends of the spring arms 14, 14 'to which the write heads 13, 13' are fixed, the rear ends of the spring arms 14, 14 'to which the read / write heads 13, 13' are fixed. Is attached to the head block 19, and the head block 19 is attached to the end of each carriage arm 12 formed integrally with the carriage 10 in a comb shape.
Fix with screws 20.

[0009]

In recent years, with the development of computer systems, magnetic disk drives have been increasing in the amount of information stored therein. There has been a demand for a structure in which the density of the head has been increased and the size of the head has been reduced, the assembly thereof has been simplified, and the number of steps for replacing parts during repair has been small.

As described above, the read / write head 1
The method of fastening the rear ends 14a, 14a 'of the spring arms 14, 14' having the third and third 13 'to the front end 12a of the carriage arm 12 directly with the screw 15 or directly mounting with the caulking 16 is as follows. / Spring arm 1 to which write heads 13, 13 'are fixed
The rear ends 14a, 14a 'of the carriage arms 12, 14a, 14a' are fastened to the front ends of the individual carriage arms 12 by screws 15 or directly by caulking 16, and the rear ends 12b of these carriage arms 12 are As shown in FIG.
It must be inserted into the insertion hole 10c formed in the carriage 10 and attached to the carriage 10 in a comb shape.

In recent years, with the miniaturization of magnetic disk drives,
At the front end of each carriage arm 12 integrally formed in a comb shape on the carriage 10, as described above, after the spring arms 14, 14 ′ with the read / write heads 13, 13 ′ fixed to the front end. There is a problem that the ends 14a and 14a 'cannot be fastened with the screws 15 and attached.

In the conventional example, when replacing the read / write heads 13 and 13 'for repair or the like, the carriage arm 12 to which the failed read / write head is attached is removed from the carriage 10. And the read / write heads 13, 1
Rear end 1 of spring arms 14, 14 'having 3'
4a and 14a 'had to be removed by loosening the screw 15 or the caulking 16, and the removal work was complicated and time-consuming. In particular, it was difficult to loosen the caulking 16, and it was difficult to replace the read / write head.

As shown in FIG.
Each of the carriage arms 12 integrally formed in a comb shape has a read / write head 13,
When the rear ends 14a, 14a 'of the spring arms 14, 14' to which the 13 'is fixed are attached by caulking, the spring arms 14 may be deformed and attached as shown in FIG.

Further, as shown in FIG.
The rear ends of the spring arms 14 and 14 'to which the write heads 13 and 13' are fixed are attached to a head block 19, and the head block 19 is attached to the carriage 10 at the tip of each carriage arm 12 integrally formed in a comb shape. In the case where the head block 19 is fixed with the screw 20, the head block 19 may not be accurately attached to the tip of the carriage arm 12, as shown in FIG.

The present invention eliminates the conventional inconvenience caused when the rear end of a spring arm having a read / write head is attached to the front end of each carriage arm integrally formed in a comb shape on a carriage. And a structure for fixing the magnetic head to the carriage arm of the magnetic disk drive, wherein the rear end of the spring arm can be very easily attached to and detached from the front end of the carriage arm formed in a comb shape integrally with the carriage. It is intended to provide a fixing method.

[0016]

In order to achieve the above object, the present invention provides a spring arm 2, 2 'having a read / write head 1, 1' at the tip as shown in FIGS. Rear ends 2a and 2a 'are fixed to a pair of read / write heads, each of which is fixed to a front end 3b of a carriage arm 3a provided in a comb shape on a carriage 3 driven to rotate by a voice coil motor. 1,
In a magnetic disk drive in which a plurality of magnetic disks mounted at predetermined intervals to a spindle driven by a rotation of 1 'seeks opposing surfaces, the rear ends 2a, 2a' of the spring arms 2, 2 'are connected to each other. Carriage arm 3a
The structure fixed to the front end 3b of the rear end 2a, 2
The projections 2c, 2 are substantially perpendicular to the mounting surfaces 2b, 2b '
c 'are formed, and these projections 2c, 2c' are inserted into mounting holes 3c formed in the distal end 3b of the carriage arm 3a so as to wrap each other from both sides thereof, and are also formed in the side surfaces of the distal end 3b. The protrusions 2c, 2 into which the fixing member 4 inserted through the formed through hole 3d is wrapped and inserted.
The structure is such that the magnetic head is fixed to a carriage arm, characterized in that it is configured to penetrate through holes 2d and 2d 'formed in c'.

[0017]

According to the magnetic disk drive of the present invention, the structure for fixing the magnetic head to the carriage arm is as described above, so that the read / write heads 1, 1 'are provided at the distal end. Projections 2c, 2c 'formed substantially at right angles to the mounting surfaces 2b, 2b' of the rear ends 2a, 2a 'of the 2' are mounted on the distal end 3b of each carriage arm 3a formed integrally with the carriage 3. The protrusions 2c and 2c 'are inserted into the hole 3c from both sides thereof so as to overlap with each other, and the fixing member 4 inserted from the through hole 3d formed in the side surface of the tip 3b is formed on the wrapped and inserted protrusion. By penetrating the through holes 2d and 2d 'from the side surface of the tip 3b of each carriage arm 3a, the tip of each carriage arm 3a formed integrally with the carriage 3 is formed. To 3b, the spring arm 2,
The rear end portions 2a, 2a 'of the 2' can be easily attached. Also, when the read / write heads 1 and 1 'are removed for replacement in the case of repair or the like, the fixing members 4 are also provided from the side surfaces of the distal end portion 3b of each carriage arm 3a.
By pulling out, the read / write head can be easily attached to and detached from the distal end 3b of the carriage arm 3a formed integrally with the carriage 3 in a comb shape.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a plan view in which the rear end of a spring arm having a read / write head is attached to the tip of a carriage arm integrally provided in a comb shape with a carriage constituting a magnetic disk drive, and FIG. FIG. 2 is a sectional view, wherein reference numerals 1 and 1 'denote read / write heads fixed to the distal ends of spring arms 2 and 2'. The rear ends 2a and 2a 'of the spring arms 2 and 2' are moved by a voice coil motor. A pair of read / write heads 1, 1 ′ are fixed to a tip 3 b of each of the carriage arms 3 a integrally provided in a comb-shape with the carriage 3 that is rotationally driven. The opposing surfaces of a plurality of magnetic disks mounted at predetermined intervals are sought.

The essential parts of the present invention are the spring arms 2 and
This is an improvement in the mounting structure of the rear ends 2a, 2a 'of the 2' and the front end 3b of the carriage arm 3a, that is, the rear ends 2a, 2 'of the spring arms 2, 2'.
The projections 2c, 2 are substantially perpendicular to the mounting surfaces 2b, 2b '
c 'are formed, and these projections 2c, 2c' are inserted into mounting holes 3c formed in the distal end 3b of the carriage arm 3a so as to wrap each other from both sides thereof, and are punched into the side surfaces of the distal end 3b. The fixing member 4 inserted through the provided through hole 3d is connected to the projection 2c,
The rear ends 2a, 2a 'of the spring arms 2, 2' are fixed to the front end 3b of the carriage arm 3a by penetrating through holes 2d, 2d 'formed in 2c'. .

The fixing member 4 may be a fixing pin, and the fixing pin may have a small diameter at the distal end and a large diameter toward the proximal end. FIG.
As shown in FIG. 7, the fixing member 4 may be a fixing screw.

The method of fixing the rear ends 2a, 2a 'of the spring arms 2, 2' to the front end 3b of the carriage arm 3a is based on the method of fixing the rear ends 2a, 2a 'of the spring arms 2, 2'. Projections 2c, 2c 'are formed substantially at right angles to the mounting surfaces 2b, 2b', and these projections 2c, 2c 'are formed in mounting holes 3c formed in the distal end 3b of the carriage arm 3a.
Are inserted from both sides thereof so as to wrap each other, and the inserted portion is heated so that through holes 3d formed in the side surface of the tip 3b and through holes 2d, 2d formed in the protrusions 2c, 2c '. ′ Is enlarged as shown by a dotted line in FIG. 3, and then the fixing member 4 is inserted into these through holes 2d and 2d ′. By doing so, when the temperature decreases after the fixing member 4 is inserted, the through holes 2d and 2d 'become smaller, and the fixing member 4 can be firmly inserted.

[0022]

According to the present invention, since the magnetic head is fixed to the carriage arm in the magnetic disk drive described above, a read / write read / write operation
A projection formed substantially at right angles to the mounting surface at the rear end of the spring arm having the head is inserted into the mounting hole formed at the front end of each carriage arm formed integrally with the carriage so as to wrap each other from both sides thereof. At the same time, the fixing member inserted from the through hole formed in the side surface of the distal end portion is passed through the through hole formed in the wrapped and inserted projection from the side surface of the distal end portion of each carriage arm, so that the carriage can be moved. The rear end of the spring arm can be easily attached to the front end of each integrally formed carriage arm. Also, when the read / write head is removed for replacement in the case of repair or the like, by removing the fixing member from the side surface of the tip of each carriage arm, the read / write head is integrally formed in the carriage in a comb shape. The read / write head can be easily attached to and detached from the leading end of the carriage arm.

Also, a method of fixing the rear end of the spring arm to the front end of the carriage arm is to form projections substantially perpendicular to the mounting surface of the rear end, and to drill these projections at the front end of the carriage arm. After being inserted into the mounting hole provided so as to wrap each other from both sides, the inserted portion is heated, and the through hole formed in the side surface of the tip portion and the through hole formed in the protrusion are enlarged. By inserting the fixing member into the through hole, the fixing member for fixing the rear end of the spring arm to the front end of the carriage arm can be easily inserted, and the insertion can be firmly performed. .

[Brief description of the drawings]

FIG. 1 shows a read / write head at the end of a carriage arm.
FIG. 5 is a plan view of a carriage to which a rear end of a spring arm having a head is attached.

FIG. 2 is a cross-sectional view of a mounting portion between a front end portion of a carriage arm and a rear end portion of a spring arm.

FIG. 3 is a cross-sectional view of another example of attachment of a front end portion of a carriage arm and a rear end portion of a spring arm.

FIG. 4 is a diagram illustrating a method of attaching a front end of a carriage arm and a rear end of a spring arm.

FIG. 5 is a plan view schematically showing the inside of a conventional general magnetic disk drive.

FIG. 6 is a schematic side sectional view of a conventional general magnetic disk drive.

FIG. 7 is a plan view showing an example of a conventional mounting structure of a carriage arm and a spring arm.

FIG. 8 is a side sectional view showing an example of a conventional mounting structure of a carriage arm and a spring arm.

FIG. 9 is a plan view showing another example of a conventional mounting structure of a carriage arm and a spring arm.

FIG. 10 is a side sectional view showing another example of a conventional mounting structure of a carriage arm and a spring arm.

FIG. 11 is a diagram showing a conventional example in which a plurality of carriage arms are inserted into a carriage in a comb shape.

FIG. 12 is a view showing a conventional example in which a spring arm is attached to each carriage arm integrally provided in a carriage in a comb shape.

FIG. 13 is a diagram showing a problem of the conventional example.

FIG. 14 is a diagram showing another conventional example in which a spring arm is attached to each of the carriage arms integrally provided in a carriage in a comb shape.

FIG. 15 is a diagram showing a problem of another conventional example.

[Explanation of symbols]

 1, 1 'read / write head 2, 2' spring arm 2a, 2a 'rear end 2b, 2b' mounting surface 2c, 2c 'projection 2d, 2d' through hole 3 carriage 3a carriage arm 3b tip 3c mounting hole 3d through hole 4 fixing member 6 magnetic disk device 6a case 7 spindle 8 spindle motor 9 magnetic disk 10 carriage 10a movable piece 10b convex piece 10c insertion hole 11 voice coil motor 11a permanent magnet 11b movable coil 11c stopper 12 carriage arms 13, 13 ' Read / write head 14, 14 'spring arm 14a, 14a' rear end 15 screw 16 caulking 17 spacer 17a through hole 18 caulking member 19 head block 20 screw

Claims (4)

(57) [Claims] 1. A read / write head (1, 1)
The rear ends (2a, 2a ') of the spring arms (2, 2') having 1 ') are provided in the form of combs on a carriage (3) rotated by a voice coil motor. A pair of read / write heads (1,
1 ') is a magnetic disk drive in which a plurality of magnetic disks mounted at predetermined intervals on a rotationally driven spindle seek the opposing surfaces of magnetic disks, wherein a rear end portion (2a) of the spring arm (2, 2') is provided. , 2
a ') is fixed to the front end portion (3b) of the carriage arm (3a) by a projection (2c, 2c') substantially perpendicular to the mounting surface (2b, 2b ') of the rear end portion (2a, 2a'). ) Are formed, and these projections (2c, 2c ') are formed in mounting holes (3) formed in the distal end (3b) of the carriage arm (3a).
c), the fixing member (4) inserted through the through hole (3d) formed in the side surface of the tip portion (3b) of the projection (3b), while being inserted so as to wrap each other from both sides thereof. A structure for fixing a magnetic head to a carriage arm, characterized in that it is configured to penetrate through holes (2d, 2d ') formed in 2c, 2c'). 2. A structure for fixing a magnetic head to a carriage arm according to claim 1, wherein said fixing member is a fixing pin. 3. The structure for fixing a magnetic head to a carriage arm according to claim 1, wherein the fixing member is a fixing screw. 4. A method of fixing a rear end portion (2a, 2a ') of a spring arm (2, 2') to a front end portion (3b) of a carriage arm (3a), comprising the steps of:
a ′) is substantially perpendicular to the mounting surface (2b, 2b ′).
c, 2c ') to form these projections (2c, 2c').
Are inserted into the mounting holes (3c) formed in the distal end portion (3b) of the carriage arm (3a) so as to wrap each other from both sides thereof, and the inserted portion is heated so that the side surface of the distal end portion (3b) is heated. (2d, 2d ') and through-holes (2d, 2d') formed in the protrusions (2c, 2c ').
A method of fixing a magnetic head to a carriage arm, wherein a fixing member (4) is inserted into these through holes after the size of the magnetic head is increased.