JP2534069Y2 - Disk drive head mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive head mechanism.

[0002]

2. Description of the Related Art As a disk drive head mechanism,
As shown in FIG. 4, the upper head 103 is attached to the tip of the upper head fracture 102 attached to the upper head base 101, while the lower head fracture 10 attached to the lower head base 104 is attached.
5, a lower head 106 is attached to the tip of the disk 10, and as shown in FIG.
7 is loaded, the lower head 106 abuts against the lower surface 107b of the disk 107, the lower head fracture 105 bends, and the elasticity (spring force) of the head fracture 105 causes a predetermined pressure (load). )
And the lower head 106 is the lower surface 107b of the disk 107.
To obtain an output signal while contacting the head lift arm 1
08, the upper head base 101 and the head fracture 102 descend, and when the upper head 103 comes into contact with the upper surface 107a of the disk 107, the upper head fracture 102 bends and the elasticity (spring force) of the head fracture 102 ), The upper head 103 comes into contact with the upper surface 107a of the disk 107 at a predetermined pressure (load) to obtain an output signal.

In FIG. 5, reference numeral 109 denotes a disk cartridge.

[0004]

In the above-described conventional head mechanism, the upper and lower head fractures 102 and 105 are bent as described above, and the upper and lower heads 103 and 106 are moved to the disk 107. Upper and lower surfaces 107a, 1
Due to the property that an output signal is obtained by contacting the 07b with a predetermined pressure (load), there is a problem as described below.

[0005] (1) at the head unloading, deflection of the upper portion of Heddofu lecture 102 disappears, that is Heddofu Lecture 102 The top 5 two points from the angle theta ¹ states when deflected shown in FIG. 5 the solid line In order to return to the original mounting angle θ ² shown by the dashed line, the head lift amount by the head lift arm 108 must be increased by that much, and as the head lift amount increases, the operating force for that increases. Also, the operation time is long.

(2) Upper and lower head fractures 10
When 2,105 mounting angle theta ² is large, the upper as shown in FIG. 6, the disk 1 is the corner portion of the head 103 and 106 of the lower
There is a possibility that these surfaces may be damaged by hitting the upper and lower surfaces 107a and 107b of the recording medium 07.

(3) To solve the above problems (1) and (2), the spring constants of the head fractures 102 and 105 should be increased and the mounting angle θ ² should be reduced. In order to achieve this, it is necessary to increase the mounting (angle) accuracy of the head fracture to the head base, or to increase the allowable range of the contact pressure of the head with the disk for obtaining an output signal.

The present invention has been made to solve the above-mentioned conventional problems.

[0009]

A head base, a head fracture attached to the head base, and a head attached to a tip of the head fracture, utilizing the elasticity of the head fracture,
In a head mechanism of a disk drive in which a head is connected to a disk at a predetermined pressure, the head base is provided with an initial angle of the head fracture (when the head comes into contact with the disk surface) rather than a mounting angle of the head fracture. An initial angle restricting body is provided for forcibly reducing the head flexure mounting angle before bending starts.

[0010]

[Function] The initial angle of the head flexure is made smaller than the original mounting angle by the initial angle regulating body, so the apparent spring constant of the head flexure is increased, and the head lift is reduced to reduce the operating force. The operation time can be reduced and the device can be made thinner.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIGS.

For convenience of explanation, the present invention will be described in the order of the schematic configuration of the disk drive, the head mechanism, the disk loading mechanism, the head loading mechanism, and the operation of the embodiment.

FIG. 1 is a perspective view of a disk drive having a head mechanism according to the present invention, and FIG. 2 is an exploded perspective view of a main part thereof.

In the figure, 1 is a disk drive,
When the disk drive inserts the disk cartridge 2 into the cartridge holder 3, the disk drive 3
Shutter opening / closing lever 5 having one end pivotally supported on shaft 4 on the upper surface of
The shutter pin 6 provided on the free end side of the disk cartridge 2 is fitted into the shutter pin receiving groove 8 of the shutter 7 of the disk cartridge 2, and the shutter opening / closing lever 5 rotates clockwise around the shaft 4 while rotating the shutter 7. Open. And
When the disc cartridge 2 is inserted to a predetermined position of the cartridge holder 3 and the shutter 7 is completely opened, the lock lever 9 rotates clockwise about the shaft 10 to allow the lock lever 9 to move freely. A step 11 for engagement provided on one side of the end side engages with a lock pin 12 provided on a free end side of the shutter opening / closing lever 5 to prevent the shutter opening / closing lever 5 from rotating back. Has become.

When the lock lever 9 is rotated clockwise, the motor 15 of the disc loading mechanism 14 provided on the chassis 13 is turned on, and the cartridge holder 3 is loaded by the disc loading mechanism 14. The disk 16 in the disk cartridge 2 inserted into the cartridge holder 3 is mounted on the spindle 17 and the head loading mechanism 18 moves the head 20 above the head mechanism 19 of the present invention from the lifting position to the disk surface. Nearby position (hereinafter referred to as dynamic head loading position)
The upper head 20 and the lower head 21 are then moved from the dynamic loading position toward the disk 16, and the upper and lower heads 20, 21 are applied to the upper and lower surfaces of the disk 16 at a predetermined pressure. It comes in contact with.

Then, the head carriage 22 having the head mechanism 19 having the upper and lower heads 20 and 21 is moved in the radial direction of the disk 16 by the head carriage driving mechanism 24 along the slide guide shaft 23. Recording and reproduction are performed.

As shown in FIG. 2, the head mechanism 19 has an upper head base support provided on the head carriage 22 by a screw 26 and a holding plate 27 via a pivot support plate 25 made of a leaf spring. An upper head base 29 mounted on the portion 28 in a horizontal state, an upper head flexure 30 mounted on the upper head base 29, the upper head 20 mounted on a tip of the upper head flexure 30, and the head Lower head base 32 mounted horizontally on lower head base support 31 provided on carriage 22
A lower head fracture 33 attached to the lower head base 32; and a lower head fracture 33
And a lower head 21 attached to the end of the lower head.

The upper head flexure 30 is made of a thin plate spring material such as phosphor bronze into an elongated isosceles triangular shape. As shown by a two-dot chain line in FIG. It is attached to the bottom side to the upper head base 29 in a state of being inclined to the theta ^2. An upper angle restrictor 35 for the upper head flexure is attached to the lower surface of the upper head base 29 with a screw 34, and the upper head flexure 30 is forced by the initial angle restrictor 35 as shown by a solid line in FIG. The initial angle θ ³ is set to be smaller than the mounting angle θ ² .

The lower head flexure 33 is also formed in an elongated isosceles triangular shape by a thin plate spring material such as phosphor bronze similarly to the upper head flexure 30, and the apex side is directed upward as shown by the two-dot chain line in FIG. lower head base 3 bottom side in a state of being inclined at a predetermined mounting angle theta ² towards the
2 attached. And, on the upper surface of the lower head base 32, an initial angle restricting body 37 for the lower head fracture is attached with a screw 36, and the lower head fracture 33 is moved by the initial angle restricting body 35 as shown by a solid line in FIG. forcibly has become state of being extended in the horizontal direction, it is set to be smaller than its initial angle theta ³ is the mounting angle theta ^2.

After the cartridge holder 3 is loaded by the disk loading mechanism and the disk 16 is mounted on the spindle 17, the upper head 20 is lowered by the head loading mechanism 18, and
The lower head 21 rises, and the upper and lower heads 20,
21 contacts the upper and lower surfaces of the disk 16 with a predetermined pressure.

Configuration of Disk Low Disk Mechanism The disk loading mechanism 14 includes the cartridge holder 3.
To perform disk loading and disk unloading.

The disk loading mechanism 14 is shown in FIG.
As shown in FIG. 5, a loading motor 38, a cam shaft 40 rotated by the motor 38 in a range of about 215 ° around a shaft 39, and a vertical length into which the tip of the cam shaft 40 fits. Loading plate drive operation plate 42 having holes 41 and loading plate drive operation plate 4
And a loading plate 43 to which the mounting plate 2 is attached.
45 are provided.

When the camshaft 40 is rotated to the maximum in the counterclockwise direction as shown in FIG. 2, that is, when the camshaft 40 is in the reference position (zero rotation position), the loading plate 43 is in the unloading direction. (Direction of arrow a)
In this state, as shown in FIG. 1, the inclined surfaces 4 of the lifting / lowering operation parts 45... 45 provided at the four corners of the loading plate 43 are provided.
Rollers 46... 46 provided on the left and right side surfaces of the cartridge holder 3 on the upper part of the cartridge holder 4 ride on the cartridge holder 3, and the cartridge holder 3 is in an unloaded state, that is, in an elevated state.

When the cam shaft 40 is rotated by 180 ° clockwise in FIG. 2 from the motor 38 in this state, the loading plate 43 slides in the loading direction (the direction of arrow b), and the rollers 46. 45, the cartridge holder 3 slides down the inclined surface 44 and enters a loading state, that is, a lowered state, so that the disk 16 of the disk cartridge 2 inserted into the cartridge holder 3 is mounted on the spindle 17. It has become.

The structure of the head loading mechanism The head loading mechanism 18 lowers the upper head 20 and raises the lower head 21 under the disk loading state, and moves the upper and lower heads 20 and 21 to the disk 16.
The upper and lower surfaces are brought into contact with a predetermined pressure, and when the disc is unloaded, the cartridge holder 3 is raised to a position where it does not hinder the lifting of the cartridge holder 3, that is, for lifting.

As shown in FIG. 2, the head loading mechanism 18 is attached to an arm support frame 47 erected on a chassis so as to be rotatable about a shaft 48, and is attached to the loading plate 43. And a dynamic loading mechanism 51 for holding the upper and lower heads 20 and 21 at positions near the upper and lower surfaces of the disk 16.

The head lift member 49 is provided with a rotating operation arm 53 having a roller 52 at its tip and a pair of left and right head lifting arms 54, 55. ,
At 55, a pair of left and right head lifting shafts 56 and 57 provided on the upper head base 29 is supported.

Then, by operating the arm 53 for rotation operation, the head lift member 49 is moved around the shaft 48 as shown in FIG.
When rotated clockwise, the pair of left and right head lifting arms 54, 55 cause the head lifting shaft 56,
When the upper head base 29 is lifted through the upper head base 57, the pivot base plate 25 made of a leaf spring, which is attached to the upper head base support portion 28 of the head carriage 22, bends upward, and 29 and the upper head fracture 30 are inclined upward, and the upper head 20 attached to the tip of the upper head fracture 30 is made to stand by at the lifting position.

On the upper surface of the head lift member operating rod 50, there is formed a roller mounting surface 58 on which the roller 52 attached to the tip of the turning operation arm 53 is mounted. The roller mounting surface 58 has a head loading surface 59, an inclined surface 60, and a head unloading surface 61 in this order from the front end side. In the disk unloading state, the roller 52 is mounted on the head unloading surface 61. Thus, the upper head 20 is supported at the lifting position.

When the loading plate 43 is slid in the loading direction (the direction of the arrow b) by the motor 38, first, the inclined surfaces 44 of the lifting / lowering operation portions 45... 45 provided on the loading plate 43 are provided on the side surfaces of the cartridge holder 3. The rollers 46 slide down and the cartridge holder 3 descends, and the disk 16 is mounted on the spindle 17. When the roller 52 is further slid in the loading direction, the roller 52 for rotating operation slides down the inclined surface 60 of the head lift member operating rod 50. The inclined surface 60
When the roller 52 slides down, the head lift member 49
2 starts to rotate counterclockwise in FIG. 2 by the spring force of the torsion coil spring 62, and when the roller 52 slides down to the head loading surface 59, the pair of left and right head lifting arms 54, 55 and the head lifting shaft 5
6 and 57 are in a non-contact state, and the upper head base 29
Is pressed against the stopper projection 64 of the head carriage 22 by the spring force of a pressing spring 63 made of a leaf spring, the upper head base 29 is in a state of being pressed down most, and the upper head flexure 30 is inclined downward. The upper head 20 attached to the tip of the disk 16 can be brought into contact with the upper surface of the disk 16.

The dynamic head loading mechanism 51 is for holding the upper and lower heads 20, 21 at a dynamic head loading position near the upper and lower surfaces of the disk 16 mounted on the spindle 17. The dynamic head loading mechanism 51 deflects the upper head flexure 30 and the lower head flexure 33 against their own spring force, so that the upper and lower heads 20 and 21 are located near the upper and lower surfaces of the disk 16. And a pair of upper and lower dynamic loading pins 6 to be kept waiting at the dynamic loading position
5, 66, a pair of upper and lower dynamic loading pins 65, 66 are mounted, a pair of upper and lower pin levers 67, 68, and a pair of upper and lower pin levers 6
7 and 68, the upper and lower pair of dynamic loading pins 65 and 66 are vertically aligned as shown in FIG.
A rotary joint 69 that releases the pressing of the upper and lower head flexures 30 and 33 by the dynamic head loading pins 65 and 66 by rotating from a state in which the head flexures 0 and 33 are deflected by pressing to a state where they are arranged in the horizontal direction. And a head loading lever 71 rotatably attached to the loading plate 43 with the projection 70 of the rotary joint 69 placed on the upper end surface.

When the cam shaft 40 is rotated by 180 ° or more from the state shown in FIG. 2 by the motor 38, the head loading lever 71 is moved by the cam shaft 40 to the shaft 72.
When the rotary joint 69 is rotated through the protrusion 70 in the clockwise direction around the center, the shaft 73 of the rotary joint 69 rotates counterclockwise, and the rotary joint 69 is attached to the shaft 73. The upper pin lever 67 rotates counterclockwise to lower the upper dynamic loading pin 65 and release the pressing of the upper head flexure 30 by the pin 65, while being attached to the shaft 73 of the rotary joint 69. Via a first gear 74 and a second gear 75 meshing with the first gear 74, a lower pin lever shaft 76 and a lower pin lever 68 attached to the shaft 76 rotate clockwise, The lower dynamic loading pin 65 is raised so that the pressing of the lower head fracture 33 by the pin 65 is released. You have me.

The head carriage drive mechanism 24 is shown in FIG.
As shown in FIG. 7, a stepping motor 77 and a steel belt 82 having a central loop 79 wound around a rotation shaft 78 of the stepping motor 77 and both ends locked to belt locking portions 80 and 81 of the head carriage 22. The rotation of the rotary shaft 78 is controlled by a steel belt 8.
2, the head carriage 22 is caused to run in the disk loading direction and the disk unloading direction instead of the linear movement of the head carriage 22.

Operation of the Embodiment The disk drive and the head mechanism of the embodiment are constructed as described above. Therefore, when the cartridge holder 3 is at the unloading position and the upper head 20 is at the lifting position, When the disk cartridge 2 is inserted into the shutter 3, the shutter 7 of the disk cartridge 2 is opened by the shutter opening / closing lever 5.
When the disc cartridge 2 is inserted to a predetermined position, the lock lever 9 rotates to prevent the return rotation of the shutter opening / closing lever 5, and the rotation of the lock lever 9 causes the switch of the loading motor 38 to switch. , The camshaft 40 rotates, and the loading plate 43 starts to slide in the disc loading direction. When the camshaft 40 is rotated by about 90 ° from the reference position shown in FIG. 2, the rollers 46... 46 slide down the inclined surface 44 of the elevating operation portions 45. Then, the disk 16 of the disk cartridge 2 inserted in the cartridge holder 3 is mounted on the spindle 17.

When the cam shaft 40 further rotates and rotates 180 ° from the reference position, the roller 52 of the head lift member 49 slides down the light slope 60 of the head lift member operating rod 50 attached to the loading plate 43, and The head base 29 and the upper head fracture 30 are tilted while rotating downward, and the upper head fracture 30 is moved by the dynamic head loading mechanism 51.
Abuts the dynamic loading pin 65 at the top of the
The lower head flexure 30 flexes to move the upper head 20 to the dynamic head loading position,
6 near the upper surface. On the other hand, the lower head flexure 33 is also provided with the dynamic head loading mechanism 5.
The lower head 21 is forcibly deflected downward by the lower dynamic loading pin 66 to make the lower head 21 wait at the dynamic head loading position, that is, near the lower surface of the disk 16.

When the camshaft 40 further rotates from this state and rotates about 215 ° from the reference position, the camshaft 40
The dynamic head loading mechanism 51
The head loading lever 71 is rotated to rotate the pair of upper and lower dynamic loading pins 65 and 66 via the rotary joint 69 so as to be horizontally aligned with each other. The upper head fracture 30 and the lower head fracture 33 whose pressure has been released extend toward the upper and lower surfaces of the disk 16, and the upper and lower heads 20 and 21 attached to the respective tips are respectively moved to the upper and lower surfaces of the disk 16. At a predetermined pressure.

[0037]

As described above, the present invention comprises a head base, a head fracture attached to the head base, and a head attached to the tip of the head fracture. In the head mechanism of a disk drive that is configured to bring the head into contact with the disk, the head base is provided with an initial angle regulating body for forcibly reducing the initial angle of the head fracture. The effect is as described.

(1) Since the initial angle of the head fracture is reduced, the amount of head lift by the head loading mechanism can be reduced. Therefore, the operation force required for the head lift can be reduced and the operation time can be shortened.

(2) Since the initial angle of the head fracture is reduced, it is possible to prevent the head angle from hitting the disk surface during loading and damaging the disk surface as much as possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a disk drive having a head mechanism according to the present invention.

FIG. 2 is an exploded perspective view of the disk drive.

FIG. 3 is a side view of a main part.

FIG. 4 is a side view of a conventional example.

FIG. 5 is a side view of a conventional example.

FIG. 6 is an explanatory diagram showing a defect of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk drive, 19 ... Head mechanism, 20 ... Upper head, 21 ... Lower head, 29 ... Upper head base, 30
... upper head fracture, 32 ... lower head base,
33: lower head fracture, 35, 37: initial angle regulating body.

Claims (1)

(57) [Scope of request for utility model registration] 1. A head base, a head fracture attached to the head base, and a head attached to a tip of the head fracture, wherein the head base has an initial angle of the head fracture. A head mechanism for a disk drive, comprising an initial angle restricting body for reducing the size of the head.