JP2525303Y2 - Disk drive - 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, and more particularly to a disk drive having a hold case which is rotatably mounted on a carriage and urged in a closing direction.

[0002]

2. Description of the Related Art Usually, an arm of a carriage transfer device of a disk drive device used for recording / reproducing a disk-shaped magnetic recording medium (hereinafter, referred to as a disk) has a side on which the disk is inserted through a hinge integrated with the arm. When the disc is inserted, the arm is closed and recording and reproduction are performed. When the arm is closed, the magnetic head and the disk are slid in contact with each other by a predetermined sliding contact force to perform recording / reproduction. Pressure) to adjust the sliding contact force.

As such a carriage transfer device, there is, for example, one as shown in FIGS. This carriage transfer device comprises a carriage 2 having a lower magnetic head 1 at the tip and an arm 4 (hold case) having an upper magnetic head 3 at a position corresponding to the lower magnetic head 1. Head side leaf hinge spring 5
The arm 4 is attached to the upper side so as to be openable. That is, the leaf hinge spring 5 attaches the holding metal 7 to the screw 8
Thus, it is fixed to the carriage 2 by being tightened to the carriage 2.

As described above, a coil spring 9 is held on the holding metal fitting 7 in order to obtain an appropriate sliding contact force of the upper magnetic head 3 on the disk, and one end of the coil spring 9 is connected to the arm 4.
The other end is engaged with one end of the holding fitting 7. The arm 4 is mounted on the carriage 2 at the proximal end as described above.
The position of the arm 4 with respect to the disk is determined by the contact height of the upper magnetic head 3 with the lower magnetic head 1 and the carriage 2 supporting the leaf hinge spring 5.
It depends on the supporting height of the upper surface of. When the arm 4 opens, the leaf hinge spring 5 bends and opens at a predetermined angle.

[0005]

By the way, the above-mentioned disk drive device has two magnetic heads 1, 3 of a lower magnetic head 1 on the carriage 2 side and an upper magnetic head 3 on the arm 4 side. Recording or reproduction is possible on both sides. The gap positions of the lower and upper magnetic heads 1 and 3 adjust the manual double side alignment (MDSA). For example, 48T
It is precisely adjusted to shift 4 tracks for PI and 8 tracks for 96 TPI, thereby ensuring disk compatibility. When attaching the arm 4 to the carriage 2, at present, while prestressing the arm 4 with a jig, use a microscope to check the displacement of the gap position of the magnetic heads 1 and 3 (substitute at the core position) with a microscope. Two types of methods are often adopted: a method of tightening, and a method of reproducing using a disc for adjusting the gap position and tightening screws while adjusting the position of the arm 4 so that the reproduced output reaches a predetermined level. . In any case, the arm 4 is fixed to the carriage 2 via a screw.
Even when the relative position between the arm 4 and the carriage 2 is accurately adjusted, when the screw 8 is tightened, the leaf hinge spring 5 and the screw
8 , there is a problem that the leaf hinge spring 5 and thus the arm 4 are slightly but deviated from the adjusted position. And, the higher the rejection rate from this problem, had Kitashi invited the result of pushing up the product cost.

The present invention has been made in view of the above-mentioned problems of the prior art, and has been made to solve the problem. The purpose of the present invention is to enable MDSA while applying load pressure in the same state as during normal reading / writing. An object of the present invention is to provide a disk drive device capable of preventing a head displacement later.

[0007]

To achieve the above object, the present invention provides a turntable for loading and rotating an information recording disk, and a carriage transported in a direction intersecting the direction of rotation of the information recording disk. A hold case rotatably supported at one end by the carriage,
A head provided on a surface facing the carriage at a tip of the hold case, a fixed head provided on the carriage facing the head, and a biasing means for biasing the hold case in a closing direction. in disk drive device including a first screw for securing the holding bracket for holding said biasing means to said carriage, said hold case hinge is interposed between the carriage and the holding metal fitting, the A second screw is provided to bend the holding metal fitting to hold and fix the hinge between the carriage and the carriage.

[0008]

According to the above-mentioned means, the holding bracket is first attached to the carriage.
The leaf hinge spring between the carriage and the holding metal can be freely moved and adjusted without being fixed in the state where the leaf hinge spring is fastened and fixed by the screw.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a front view of a carriage device portion of the disk drive device according to the present invention, FIG. 2 is a plan view of a main part of FIG. 1, and FIG. 4 is a sectional view taken along line AA of FIG. 1 , and FIG.
FIG. 6 is an explanatory diagram showing the relationship between the leaf hinge and the holding bracket and the carriage during the MDSA adjustment. FIG. 7 is an explanatory diagram showing the relationship between the leaf hinge and the holding bracket and the carriage during the MDSA adjustment. (A), (b)
Is a plan view and a side view of the holding bracket, and FIG. 9 is a bottom view of the carriage.

Although not shown, this type of disk drive is supported between a chassis and a side plate of the chassis so as to be vertically movable with respect to the chassis body, and is inserted into a cartridge insertion opening (not shown). And a cartridge holder that holds the
Disk cars and Toritsuji turntable the magnetic disk that is housed in the case is driven to rotate, the spindle motor as rotary drive means of shear sheet turntable disposed on the bottom side of the rotationally driving the turntable, the turntable Magnetic heads 10a and 10b for writing and / or reading signals to and from the magnetic disk loaded in the head, and these magnetic heads 10a and 10b
And a carriage transfer device including a stepping motor for transferring the carriage 11 swingably supporting the hold case 12 in the radial direction of the magnetic disk. Is configured.

This carriage transfer device is equipped with a lower magnetic head 10a, and is transported linearly in the radial direction of a magnetic disk along a guide shaft 13.
An arm 12, also referred to as a hold case, which is mounted with an upper magnetic head 10b and is rotatably supported on the carriage 11 via a leaf hinge spring 14, and is arranged between the rear end of the arm 12 and the carriage 11. And a coil spring 15 for elastically biasing the magnetic heads 10a and 10b in a direction approaching each other, and a leaf hinge spring 14 of the arm 12 for holding the coil spring 15 and the carriage 1.
1 and a first screw 17 for fastening the holding bracket 16 to the carriage 11 and second screws 18 arranged on both sides of the first screw 17. . This carriage 11 is shown in FIGS.
And the first screw 17 and the second screw 1 as shown in FIG.
Insertion holes 19, 20, and 20 through which the first and second screws are inserted are formed, and an annular protrusion 21 is formed at an upper opening edge of the insertion hole 19 through which the first screw is inserted. The lower surface of the holding fixture 16 is placed in contact with the upper surface of 21. The height of the annular projection 21 is set to, for example, 0.1 mm, while the thickness of the leaf hinge spring 14 placed on the carriage 11 is set to 0.08 mm. Upper surface of carriage 11 and holding bracket 16
The leaf hinge spring 14 sandwiched between the leaf hinges has a gap 22 of 0.02 mm. Even when the holding bracket 16 is fastened and fixed to the carriage 11 with the first screw 17 (a predetermined rod pressure is applied), the leaf hinge spring 14 The spring 14 (ie, the integral arm 12 and the upper magnetic head 10b) can be freely moved with respect to the carriage 11 (ie, the lower magnetic head 10a). By tightening the second screws 18, 18, the holding bracket 16 is bent, and the gap 22 is eliminated near both ends of the holding bracket 16, and the leaf hinge spring 14 is sandwiched and fixed between the upper surface of the carriage 11 and the lower surface of the holding bracket 16. Is done. The holding member 16 is formed by bending a plate material , and as shown in FIGS. 8A and 8B, the insertion hole 2 through which the first screw 17 and the second screw 18 are inserted.
3, 23, 23, a holding piece 24 for inserting and holding the coil portion of the coil spring 15, and an adjusting engagement groove 25 for engaging the other end of the coil spring 15.

The arm 12 is integrally formed with the leaf hinge spring 14 as described above. The leaf hinge spring 14 has spring holes 26 and 2 as shown in FIG.
6 and 26 are provided so as to be movable on the upper surface of the carriage 11.

Each of the first screw 17 and the second screw 1 described above
As shown in FIG. 4, FIG. 5, and FIG. 9, the lower end protrudes from the lower surface of the carriage 11 and is screwed and fixed to the female screw portions 28a of the mounting plate 28 of the follower pin 27, respectively. I have. As a result, the mounting plate 28 is also fixed by fitting the follower pin 27 into the V groove 29 on the lower surface of the carriage 11. Fuorowa mounting plate 28, as shown in FIG. 5, the pressing piece portion 28b of the generally V-shaped, 28b are extended, the pressing piece portion 28b, securing the Yotsute Fuorowapin 27 V grooves 29 to 28b. Follower pin 27
As shown in FIG. 4 and FIG.
Follower pin 27 protruding sideways from the lower surface of
4 engages with a spiral feed groove formed on the outer periphery of the screw shaft 30 as shown in FIG. 4 to convert the rotational movement of the screw shaft 30 into a linear movement of the carriage 11. In this embodiment, the follower pin 27 is formed by cutting a small rod-shaped stainless steel for a spring into a predetermined length, and an inexpensive follower pin 27 is used. Since the follower pin 27 formed in this manner has burrs at its end, the pressing piece 28b
Is arranged so as not to press the other end 27b of the follower pin 27. In addition, 31 is a holding plate.

Next, the adjustment of the MDSA of the embodiment will be described. First, assume the state shown in FIG. That is, the holding bracket 16 is fastened and fixed to the carriage 11 by the first screw 17 with the leaf hinge spring 14 of the arm 12 interposed on the upper surface of the carriage 11. In this state, the holding fitting 16 is integrally fixed to the carriage 11 by the first screw 17, but the holding fitting 1 is fixed by the annular projection.
There is a gap 22 between the lower surface of the carriage 6 and the upper surface of the carriage 11, and the leaf hinge spring 14 can move on the upper surface of the carriage 11 without being fixed by the first screw 17.
In this state, the second screw 18 is not tightened.
In the state shown in FIG. 6, the holding bracket 16 is fixed to the carriage 11, so that the coil spring 15 held by the holding bracket 16 is in the same state as during normal reading / writing. Therefore, there is no change in the load pressure at the time of adjusting the MDSA and thereafter.

In the state shown in FIG. 6, the leaf hinge spring 14 is moved to move the lower magnetic head 10a and the upper magnetic head 10b.
Is determined in the same manner as in the above-described conventional method, the second screws 18, 18 are tightened and fixed to the carriage 11 as shown in FIG. That is, the second screw 1
When the brackets 8 and 18 are tightened, both ends of the holding bracket 16 bend downward, and the lower surface of the holding bracket 16 comes into close contact with the leaf hinge spring 14, that is, the leaf hinge spring 14 is attached to the carriage 1.
1 is held and fixed by the upper surface of the holding member 1 and the holding bracket 16. When the second screw 18 is tightened, the coil spring 15 which is held by the holding bracket 16 and applies the load pressure to the arm 12
Has no effect on the load, the load pressure does not fluctuate, and normal reading / writing can be performed with the adjusted performance.

[0016]

[Effects of the Invention] As described above, according to the present invention,
MDSA can be performed while applying load pressure in the same state as during normal reading / writing, and a disk drive device that prevents head displacement after MDSA can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of a carriage device portion of a disk drive device according to the present invention.

FIG. 2 is a plan view of a main part of FIG.

FIG. 3 is a plan view of a main part showing a state where a holding bracket of FIG. 2 is removed.

FIG. 4 is a sectional view taken along line AA of FIG. 1 ;

FIG. 5 is a view taken in the direction of the arrow A in FIG. 4;

FIG. 6 is an explanatory diagram showing a relationship between a leaf hinge, a holding bracket, and a carriage during MDSA adjustment.

FIG. 7 is an explanatory diagram showing a relationship between a leaf hinge, a holding bracket, and a carriage after MDSA adjustment.

FIG. 8 is an explanatory diagram of a holding bracket.

FIG. 9 is a bottom view of the carriage.

FIG. 10 is a plan view of a conventional carriage portion.

FIG. 11 is a front view of a conventional carriage.

Claims (1)

(57) [Scope of request for utility model registration] 1. A turntable for loading and rotating an information recording disk, a carriage conveyed in a direction intersecting a rotation direction of the information recording disk, and one end supported by the carriage to be rotatable. Hold case,
A head provided on a surface facing the carriage at a tip of the hold case, a fixed head provided on the carriage facing the head, and a biasing means for biasing the hold case in a closing direction. in disk drive device including a first screw for securing the holding bracket for holding said biasing means to said carriage, said hold case hinge is interposed between the carriage and the holding metal fitting, the disk drive apparatus is characterized by providing a second screw and fixed sandwich the hinge between the flexed retaining bracket carriage.