JP2000322881A - Magnetic disk apparatus and disk array system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a work and a jig for positionally adjusting an interface connector due to errors because of accuracy of parts. SOLUTION: The magnetic disk apparatus consists of an HDA including disks 3 as a magnetic recording medium, magnetic heads 7 for recording or reproducing information to the disks 3 and a base 2 and a cover 15 for enclosing the disks 3 and magnetic heads 7, a main substrate 11 with a circuit part for controlling the HDA and transmitting and receiving information signals, and an interface connector 1 for transmitting and receiving information signals between a host apparatus and the main substrate and supplying a power source. In this case, a plurality of fixing screw holes 19 for setting the magnetic disk apparatus to the host apparatus are formed to a base 1. For accurately ensuring a position of the interface connector based on the fixing screw holes as a reference position, the interface connector itself is directly fixed by screws or fixedly bonded to the base in the magnetic disk apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for accurately and easily mounting a magnetic disk drive to a connector on a housing when a plurality of magnetic disk drives are attached to and detached from a housing.
The present invention relates to accurate positioning of an interface connector of a magnetic disk drive.

[0002]

2. Description of the Related Art Conventionally, regarding a magnetic disk drive,
Various items are standardized. For example, the diameter and position of a screw hole for fixing the magnetic disk device to the housing of the host device, the outer shape of the magnetic disk device, the shape and power supply voltage of the power connector, and the arrangement of the connection terminals in the connector,
Such items include an interface connector for transmitting information and an arrangement of terminals for transmitting and receiving signals.

[0003] These standards have been unified mainly in consideration of the convenience of a manufacturer that mounts a magnetic disk device in its own product, when handling a magnetic disk device by a plurality of manufacturers. is there.

On the other hand, regarding the size of a magnetic disk drive, since a portable magnetic disk drive first appeared, the diameter of a disk medium used in the portable magnetic disk drive was described as “8 inch form factor size magnetic disk drive. The name has been used. Here, the form factor size magnetic disk device is a unified standard for the external size of the magnetic disk device. For example, a 3.5 inch form factor size magnetic disk device is a 2.5 inch form factor size. The magnetic disk drive according to the unified standard has a relationship that has a main surface twice as large as the outer main surface of the magnetic disk drive.

[0005] Among the small magnetic disk drives at present, those relatively commercially available are 2.5-inch form factor sized magnetic disk drives. In this apparatus, a disk medium having a diameter of 2.5 inches is mounted.

In a large-capacity disk array system or a RAID system having a plurality of magnetic disk devices mounted thereon, generally, even when a failure occurs in the magnetic disk device and the magnetic disk device is replaced, the power supply of the system is replaced. It has a function that can be replaced without cutting (hot-swap function). For this reason, recently, "SCA-2" which is a standard for integrating a conventional power supply connector and an interface connector so that a magnetic disk device can be attached to and detached from a host system has appeared (hereinafter, such an integrated type). The connector is also referred to as an "interface connector."

In the SCA-2 standard, the signal arrangement of the interface connector, the center position of the screw hole for fixing the magnetic disk device to the upper casing (or the tray of the upper casing), and the surface to be fixed to the upper casing ( The position error and the like of the interface connector are defined based on the Z plane in FIG. 1).

What has been described above is the background art relating to the interface connector of the magnetic disk drive. Next, a specific conventional technique for positioning the interface connector with respect to the magnetic disk drive will be described with reference to FIGS.
This will be described with reference to FIG. First, FIGS.
In 2, 2 is a base, 3 is a disk, 4 is a spindle motor, 5 is a disk spacer, 6 is a disk clamp, 7 is a head, 8 is a carriage, 9 is a voice coil motor, 10 is a coil, 11 is a main board, 16 Is a board fixing screw, 19 is a magnetic disk device fixing screw hole, 25 is an upper case (FIG. 20), 27 is a tray (FIG. 21), 28 is a system side connector, 30 is a magnetic disk device fixing screw (FIG. 22), 34 is a conventional interface connector,
Respectively.

Here, the structure surrounded by the base 2 and the cover 15 is an HDA (Head Disk Assembl).
y), the combination of the HDA, the main board 11 and the conventional interface connector 34 is connected to a magnetic disk device or an HDD (Hard Disk Drive).
e). The main board 11 is fixed to the HDA base 2 with board fixing screws 16, and the conventional interface connector 34 is fixed to the main board 11 by soldering of electric wiring and other screws.

Further, in order to attach / detach the magnetic disk device to / from the upper casing 25, for example, a tray 27 may be interposed. According to FIG. 22, the magnetic disk device is fixed with the screw 30 and the device fixing screw hole 19 of the magnetic disk device. Then, by mounting this tray to the upper case 25, the conventional interface connector 34 of the magnetic disk device is electrically connected to the connector 28 of the upper case 25 via the relay connector 31.

As another prior art relating to the positioning of the interface connector in the magnetic disk drive, those having the structure shown on page 1 of JP-A-10-40673 and FIG. 1 of JP-A-8-102169 are shown in FIG. There is one having an interface connector protruding outside the housing 1 as shown in the drawing.

[0012]

The above-mentioned Japanese Patent Application Laid-Open No. 10-40 / 1998
According to the conventional structure disclosed in Japanese Patent No. 673, the conventional interface connector 34 is inserted from the device fixing screw hole 19 provided in the base 2 in which the positional accuracy is specified by the SCA-2 standard.
During this period, at least an error in attaching the main board 11 to the HDA and an error in attaching the conventional interface connector 34 to the main board 11 occur. FIG.
The thickness error of the main board 11 occurs between the Z-plane 7 and the conventional interface connector 34.

In the above-described conventional structure, there are many components interposed between the device fixing screw hole 19 and the conventional interface connector 34, the positional accuracy of which is defined by the SCA-2 standard. Since the accuracy defined by the standard cannot be satisfied, a position adjusting operation and an adjusting jig are required when fixing the main substrate 11 to the HDA. That is, the positional relationship between the magnetic disk device fixing screw holes (hereinafter, referred to as fixing screw holes) provided in the HDD for mounting the magnetic disk device (HDD) on the upper housing and the interface connector of the HDD is strictly settled. In other words, the electrical and mechanical connection with the connector on the upper housing side is accurately performed, and the compatibility of the HDD is ensured.

An object of the present invention is to eliminate the need for a conventional position adjusting operation of the interface connector 34 and a work jig, and to reduce the cost of a magnetic disk device and other information recording / reproducing devices.

When the magnetic disk device is fixed to the upper case 25, if the positional error between the conventional interface connector 34 on the upper case 25 side and the magnetic disk device side is large, it is impossible to insert the magnetic disk device smoothly. When the magnetic disk device is inserted into the upper housing 25 in a state where the position error between the two connectors is large, both connectors are fixed while a force in the insertion direction is applied. In this case, the force applied to the conventional interface connector 34 is directly connected to the solder portion of the main board 11 (the electrical connection between the main board and the interface connector (I / F connector) is connected by soldering). Part) and a fixing part to the main board 11 (a part where the I / F connector is fixed to the main board with screws or pins). It becomes Rukoto.

When a force is applied to the main board 11 itself or a force is applied to the solder portion, there is a possibility that the element may be disconnected due to cracks in the solder for soldering the element on the main board 11.

An object of the present invention is to avoid the potential (possibility) of the disconnection and to improve the reliability of the magnetic disk device and other information recording / reproducing devices.

In the method of fixing the conventional interface connector 34 to the main board 11, the conventional interface connector 34 does not come into contact with the adjacent HDA (the conventional I / F connector 34 has a gap between it and the HDA). ), It was necessary to provide clearance.

An object of the present invention is to eliminate unnecessary clearances and to further reduce the size or increase the capacity.

According to JP-A-8-102169, the conventional interface connector 3 is provided outside the HDA.
4 is fixed, but the magnetic disk drive has the form factor, and the conventional interface connector 3
4 cannot be mounted outside the form factor of the magnetic disk drive.

In the present invention, the interface connector 1
Is the form factor (the main surface of the rectangular parallelepiped circumscribing the HDD)
The problem is to implement it inside.

[0022]

In order to solve the above-mentioned problems, the present invention mainly employs the following configuration.

An H comprising a disk as a magnetic recording medium, a magnetic head for recording or reproducing information on or from the disk, and a base and a cover containing the disk and the magnetic head.
DA (Head Disk Assembly), a main board having a circuit section for controlling the HDA and sending and receiving information signals, and sending and receiving information signals and supplying power between a host device and the main board. An interface connector for fixing the main board to the base with screws, and a plurality of fixing screw holes for attaching the magnetic disk drive to a host device. Provided,
A magnetic disk drive in which the interface connector itself is directly screw-fixed or adhesively fixed to the base in order to accurately secure the position of the interface connector with the fixing screw hole as a reference position.

An HDA including a disk as a magnetic recording medium, a magnetic head for recording or reproducing information on or from the disk, a base and a cover including the disk and the magnetic head, an HDA for controlling the HDA and an information signal A main board having a circuit unit for transmitting and receiving, between the host device and the main board, an interface connector for transmitting and receiving information signals and supplying power,
Wherein the main board is fixed to the base with screws, and the base has an interface including both side surfaces in a direction in which the interface connector is inserted and a facing surface facing the interface connector insertion. A magnetic disk drive in which a positioning groove for a connector is formed, the interface connector is inserted and positioned in the positioning groove of the base, and the interface connector itself is directly fixed to the base.

Also, an HDA comprising a disk as a magnetic recording medium, a magnetic head for recording or reproducing information on or from the disk, a base and a cover for sealing the disk and the magnetic head, and an information signal for controlling the HDA A magnetic disk drive comprising: a main board having a circuit unit for transmitting and receiving data; and an interface connector for transmitting and receiving information signals and supplying power between the host device and the main board. A member having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface when positioning and fixing the HDA, the interface connector,
A magnetic disk drive, comprising: a connector assembly having an integral structure, wherein the connector assembly and the main board are simultaneously screw-fixed to a base.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A magnetic disk drive according to an embodiment of the present invention is shown in FIGS.
This will be described below with reference to FIGS.

Here, 1 is an interface connector (I / F connector), 2 is a base, 3 is a disk, 4 is a spindle motor, 5 is a disk spacer, 6 is a disk clamp, 7 is a head, 8 is a carriage, and 9 is Voice coil motor, 10 is a coil, 11 is a main board, 12
Is a board mounting screw hole, 13 is a sealed connector, 14 is F
PC (flexible printed circuit board) fixing plate, 15 is a cover, 16 is a board fixing screw, 17 is a connector / base fixing screw, 18 is a connector / base fixing screw hole, 19 is a magnetic disk device fixing screw hole (device fixing screw). Hole), 20 is a connector / base positioning hole, 21 is a connector positioning pin, 22 is a connector assembly, 23 is a board mounting hole (connector assembly), 24 is a board / connector fixing screw, 25 is an upper housing, 26 is Control device, 27 is a tray, 28 is a system side connector, 29 is a tray fixing hole, 30 is a device fixing screw, 31 is a device relay connector, 32 is an FPC (flexible printed circuit board), 33 is a read / write control board,
Respectively.

FIG. 1 is a sectional view of a magnetic disk drive according to an embodiment of the present invention, and FIG. 2 is a sectional view showing the internal structure of an HDA (a structure surrounded by a base 2 and a cover 15). 3 shows the device fixing screw holes 19 and I in FIG.
FIG. 4 is a diagram showing a positional relationship with the / F connector 1, and FIG.
FIG. 5 is a side view in which the I / F connector is fixed to the HDA base by screws, and FIG. 6 is a view in which the I / F connector is bonded to the HDA base. FIG. 7 shows that the I / F connector is HD.
FIG. 8 is a side view attached to the base of A, FIG. 8 is a view in which a positioning groove for inserting and fixing an I / F connector is provided in the base of HDA, and FIG. FIG. 10 is a side view in which the I / F connector is inserted and fixed, and FIG. 10 is a side view in which the I / F connector is inserted and fixed in the positioning groove provided in the base of the HDA.
1 is a diagram in which positioning pins for positioning the I / F connector are provided on the base of the HDA, FIG. 12 is a diagram in which the I / F connector is fixed to the HDA with the positioning pins, and FIG. FIG. 14 is a side view in which the / F connector is fixed to the HDA, and FIG. 14 is a magnetic disk drive (HDD).
Of a member having a device fixing screw hole for fixing an HDA, a member having a surface serving as a reference when positioning and fixing the HDA itself, and an interface connector are fixed to the HDA as a connector assembly integrally molded. 15 is a view of FIG. 14 viewed from the Z plane, and FIG. 16 is a view of FIG.
FIG. 5 is a diagram viewed from the Z plane with the main board removed.

FIG. 17 is a diagram in which a main board and an I / F connector are fixed to an HDA according to the prior art.
FIG. 8 is a diagram showing the positioning of the I / F connector in the prior art, and FIG. 19 is a side view showing the positioning of the I / F connector in the conventional technology.

FIG. 20 is a diagram showing an upper case on which a magnetic disk device is mounted, and FIG. 21 is a diagram showing an upper case including a tray for mounting and removing the magnetic disk device.
FIG. 22 is a configuration diagram of attaching and detaching the magnetic disk device to and from the tray.

Disk 3 (FIG. 1) for holding information magnetically, using aluminum as a substrate material and forming a magnetic film on its surface
Is driven to rotate by the spindle motor 4. An electromagnetic coil is provided on the surface of the rotating disk 3 for converting between an electric signal for magnetically writing or reading information and a magnetic field by floating while maintaining a constant space of only several tens of nm. There is a head 7 made of a material mainly formed of ferrite or a metal thin film, and a carriage 8 made of aluminum or magnesium for accurately positioning the head 7 on the surface of the disk 3.

The head and the carriage are composed of a coil 10 wound with an aluminum or copper wire having an insulating film, a permanent magnet magnet, and a yoke for supporting the magnet and forming a magnetic circuit. The driving position is determined by the voice coil motor 9.

The signal at the time of reading / writing of the head 7 is
A read / write control board 33 which is transmitted through a carriage 8 (not shown) to an FPC (flexible printed circuit board) 32 (FIG. 2) by a thin wire of an electromagnetic coil provided in the It is transmitted to the outside of the HDA by a hermetically sealed connector 13 provided by bonding aluminum, stainless steel, or iron as a material to the base 2 located on the lower surface thereof. The hermetically-sealed connector 13 relays an electric signal between the inside and outside of the HDA, and has a complete seal between a plurality of pins for transmitting the signal and a molded portion for holding the pin. .

The driving current of the coil 10 is also
2 to the sealed connector 13. The drive current of the spindle motor 4 is also transmitted to the sealed connector 13 by a motor FPC (not shown) guided from the spindle motor 4. The hermetic connector 13 is transmitted to the main board 11 for controlling a device provided outside the HDA.

The spindle motor 4 and the shaft of the carriage 8;
The voice coil motor 9 is fixed to the base 2 with screws,
A cover 15 (FIG. 1) made of aluminum, stainless steel, or iron is screwed via a packing (not shown) to maintain the airtightness between the base 2, the spindle motor 4, the shaft of the carriage 8, and the voice. It is fixed to the coil motor 9 with screws.

In the HDA constructed as described above, in the operation state of writing or reading information between the head 7 and the disk 3, in order to accurately process the signal, an intervening object enters this space. Since the magnetic path must not be obstructed, it must be kept clean at all times. Therefore, an internal filter (not shown) is provided, and the internal dust is captured by the air circulation system inside the HDA generated by the rotation of the disk 3. I do it.

The large-capacity type magnetic disk drive has a plurality of disks 3 mounted thereon in order to obtain a storage capacity.
A disk spacer 5 (FIG. 1) is provided between the disks 3 and the distance between the heads 7 is
The spacing between the heads 7 is kept constant by finishing the mounting surface of the head 7 accurately.

As a form factor of a magnetic disk drive on which a 3.5-inch size disk 3 is mounted, FIG.
A dimension 146 ± 0.5 mm, b dimension 41.3 ± 0.5
The standard size is 101.6 ± 0.5 mm in the dimension c in FIG. 3, and the dimension b is 25.4 (1
Inch) ± 0.5 mm. In any case, all of the above components must be mounted in this area.

The SCA-2 standard for a magnetic disk drive on which a 3.5-inch disk 3 is mounted is as follows.
The i dimension in FIG. 3, which is the distance from the center of the magnetic disk device fixing screw hole 19 for fixing the magnetic disk device to the upper casing 25 (FIGS. 20 to 22) to the insertion side end surface of the interface connector 1, is 41. .28 ± 0.5mm, c
The squareness tolerance h between the X reference as the center of the dimension and the insertion-side end face of the interface connector 1 is 0.38 (0.01
5 inches) or less, fixed to the upper case 25 in FIG.
The position tolerance k of the outer dimension j of the insertion portion of the interface connector 1 with respect to the X reference which is the center of the surface and the dimension c of FIG. 3 is 1.02 (0.04 inch) mm or less, and is fixed to the upper housing 25. The position tolerance e of the insertion opening dimension g of the interface connector 1 with respect to the plane (Z plane in FIG. 1) is 1.02 (0.04 inch) mm or less, and the parallelism tolerance f is 0.38 (0.015 inch). The interface connector 1 must be mounted with an accuracy of less than mm.

Hereinafter, the magnetic disk drive according to the embodiment of the present invention will be described in detail. In order to minimize each position error from the device fixing screw hole 19 for fixing to the upper housing 25 to the interface connector 1, it is necessary to minimize the number of components interposed therebetween.

As shown in FIG. 1, the upper housing 25 (FIGS.
22) An HDA base 2 provided with a device fixing screw hole 19 for fixing to a member, a member having a device fixing screw hole 19 for fixing to an upper housing 25, or a device for positioning and fixing the device. (Z in FIG. 1)
The interface connector 1 is fixed to a member having a (surface).

In the assembling method, first, only the electrical connection is made to the interface connector 1 of the main board 11,
After fixing the interface connector 1 of the main board 11 to the DA base 2 with the connector / base fixing screw 17 (FIG. 3), the entire main board 11 is fixed to the board fixing screw 1.
At 6 fix to HDA. FIG. 4 is a diagram showing details of mounting from the direction of insertion of the interface connector 1, and FIG. 5 is a side view of FIG.

As a result, as shown in FIGS. 17 to 19, in the conventional structure in which the conventional interface connector 34 is fixed only to the main board 11, the mounting for fixing the main board 11 to the HDA is performed. Hole position error and hole diameter error (main board 11 mounting error)
Can be deleted. In addition, a mounting hole position error and a hole diameter error (fixing error of the conventional interface connector 34) for fixing the conventional interface connector 34 to the main board 11 can be eliminated.

FIGS. 1, 3 to 5 showing an embodiment of the present invention.
According to the configuration example, there is only an error in fixing the interface connector 1 to the base 2.

In other words, in order to achieve the task of attaching the HDD to the upper housing and accurately aligning the I / F connector 1 with the connector (31 or 28 in FIG. 22) on the upper housing, As shown in FIG.
An accurate positional relationship with the / F connector 1 is required. Referring to FIG. 3, magnetic disk device fixing screw holes 19 are provided.
With reference to the reference position, the high-precision positioning of the I / F connector 1 defines the distance i of the connector end, the degree of inclination of the connector 1 (square angle h), the displacement k of the connector 1, and the like. In the embodiment of FIGS. 1 and 3 to 5 of the present invention, the I / F connector 1
Is directly fixed to the base of the HDA in which the device fixing screw holes 19 are planted with the screws 17.

In the prior art shown in FIG.
It is attached to the base and the I / F connector is attached to the main board. According to this, the terminal position of the I / F connector includes two attachment errors when viewed from the device fixing screw hole 19. .

The method of fixing the interface connector 1 to the base 2 may be adhesion (FIGS. 6 and 7) other than the screw 17 described above.

Further, a positioning groove (j-dimension portion in FIG. 8) is provided in the base 2 so that the precision of the side surface of the interface connector 1 is strict, and X and Y in the drawing of the positioning groove are shown.
With the interface connector 1 applied in the axial direction,
The interface connector 1 may be fixed to the connector / base fixing screw hole 18 (FIG. 8) with the connector / base fixing screw 17 (FIGS. 8 to 10). In FIG. 8, the positioning grooves of the base 2 are formed from both side surfaces in the direction of inserting the I / F connector and opposing surfaces facing the insertion of the I / F connector.

The connector positioning pin 2 made of stainless steel, iron, aluminum, plastic or the like is used.
The connector / base positioning hole 20 of the interface connector 1 is inserted into the connector positioning pin 21 while the connector / base positioning hole 20 of the interface connector 1 is provided by press-fitting or bonding the base 1 into the base 2 (FIG. 11). With the interface connector 1 positioned in position, the connector / base fixing screw hole 18 (FIG. 1)
In 1), the interface connector 1 may be fixed with the connector / base fixing screw 17 (FIGS. 11 to 13).

As described above, by providing the positioning means for limiting the fixing position of the interface connector 1, workability and positioning accuracy when fixing the interface connector 1 can be improved.

Further, according to the above embodiment, Z in FIG.
Main board 11 from surface to interface connector 1
Thickness error can be eliminated.

A conventional interface connector 34;
Comparison of the error from the center of the device fixing screw hole 19 for fixing the interface connector 1 of the embodiment shown in FIGS. 11 to 13 to the upper housing 25 to the insertion side end face of the interface connector 1 is as follows. .

In the case of the conventional mounting method of the interface connector 34 (FIG. 17), the main board mounting screw hole 12 (FIG. 8) is fixed from the center of the device fixing screw hole 19 (FIG. 3) of the base 2 for fixing to the upper housing 25. ) The error up to (M2 size) is ± 0.1 mm. When the diameter of the board mounting screw hole 12 of the main board 11 is set to 2.5 ± 0.1 mm, the mounting error of the main board 11 is calculated by 0.3 mm.
Of the conventional positioning pin hole 35 (FIGS. 18 and 19) (2.4)
± 0.1 mm) is assumed to be ± 0.1 mm.

When the diameter of the conventional positioning pin 36 press-fitted into the conventional interface connector 34 is 2 mm and the tolerance is 0 to +0.01 mm, the mounting error between the main board 11 and the conventional interface connector 34 is calculated to be 0.25 mm. , Conventional interface connector 3
4 is ± 0.1 m from the center of the conventional positioning pin 36 to the insertion-side end face of the conventional interface connector 34.
m, in the conventional mounting method of the interface connector 34, at least the sum of the errors is 0.85 mm (2
About 0.427) is generated in terms of the sum of squares.

According to the mounting method of the interface connector 1 of the embodiment shown in FIGS.
The error from the center of the device fixing screw hole 19 of the base 2 (FIG. 11) to the center of the connector positioning pin 21 is ± 0.1 mm. The connector positioning pin 21 has a diameter of 2
mm, the tolerance is 0 to +0.01 mm, and the connector / base positioning hole 20 of the interface connector 1 (FIG. 1)
2, the mounting error between the main board 11 and the interface connector 1 when the diameter is 2.4 ± 0.1 mm is calculated to be 0.25 mm, and the interface connector 1 from the connector / base positioning hole 20 of the interface connector 1 is calculated. ± 0.1mm to the insertion side end face
Then, according to the embodiment shown in FIGS. 11 to 13, at least the sum of the errors is about 0.45 mm (0.278 in terms of the square sum average value).

From the above results, the upper housing 2 is compared with the conventional case.
5, the total error from the center of the device fixing screw hole 19 of the base 2 (FIG. 11) to the insertion-side end face of the interface connector 1 can be reduced by about 47%. The tolerance of the parts used in the above calculation is within a range that is common and common sense in the current machining accuracy.

Further, according to the embodiment shown in FIGS. 11 to 13, the interface connector 1 insertion opening (the Z plane in FIG. 1) with respect to the plane (Z plane in FIG. 1) which is a reference when positioning and fixing the magnetic disk drive. The position e of the g dimension) is ± 0.1 mm for a processing error from the Z plane of the base 2 to the mounting surface of the interface connector 1, and from the end face of the interface connector 1 to one of the end faces of the insertion port (g dimension in FIG. 1). ± 0.1 mm and ± 0.1 mm up to the other surface, the total error is about 0.3 mm.

According to the embodiment shown in FIGS.
The positional accuracy of the interface connector 1 with respect to the device fixing screw hole 19 for fixing the device or a surface (Z surface in FIG. 1) serving as a reference when positioning and fixing the device is secured only by the accuracy of the components interposed therebetween. This eliminates the need for a position adjustment jig or adjustment work.

Next, as shown in FIGS. 14 to 16, a device fixing screw hole 19 for fixing a magnetic disk device (HDD) is provided.
And a member having a surface serving as a reference when positioning and fixing the magnetic disk device itself, and a component as a connector assembly 22 integrally formed with the interface connector 1. There is a method in which the main board 11 and the connector assembly 22 are simultaneously fixed to the base 2 at the position of the board mounting hole (connector assembly) 23 with the board fixing screw 16 by mounting the board and making electrical connection with the interface connector 1. .

According to the embodiment shown in FIGS.
Since the sum of the errors is at least about 0.45 mm (0.278 in the sum of squares), the center of the device fixing screw hole 19 for fixing the device and the interface connector 1
The position error with the insertion side end face is ± 0.4 mm or less,
The product can be manufactured in a state where sufficient accuracy is secured without adjusting the position.

The magnetic disk drive as described above
As shown in FIG. 22, the interface connector 1 of the device is inserted into the device relay connector 31 fixed to the tray 27 of the upper casing 25, and the device is fixed to the tray 2 with the device fixing screw 30.
Fix to 7. The system-side connector 28 is inserted into the device relay connector 31 on the side opposite to the side on which the magnetic disk device is fixed. The tray 27 is inserted into the upper case 25 (FIG. 2).
0) Then, the tray 27 is fixed to the upper housing 25 with the tray fixing screw holes 29 of the tray 27. The upper housing 25 is provided with a control device 26 for controlling the magnetic disk device.

The above description is for a 3.5 inch disk 3
Is an example of a magnetic disk drive equipped with
It can be used for other information recording / reproducing devices. Further, the current interface connector 1 is a connection method by electrical contact, but in the future, even if a means for transmitting an information signal in a non-contact manner by optical technology can be realized, the upper housing 25 may be used. Since the positioning accuracy of the information signal transmission units of the information recording / reproducing device and the information recording / reproducing device is required, the problem of the positional error can be solved by using the technical idea of the present embodiment.

As described above, the present invention includes the following embodiments.

As shown in FIGS. 1 to 5, an HDA base 2 provided with a device fixing screw hole 19 for fixing to the upper case 25, or a device fixing screw hole for fixing to the upper case 25. 1 or a reference surface (Z in FIG. 1) for positioning and fixing the magnetic disk drive.
The interface connector 1 is fixed to a member having a (surface). Here, the method of fixing the interface connector 1 to the base 2 may be adhesion (FIGS. 6 and 7) other than the above.

A positioning groove (j-dimension portion in FIG. 8) is provided in the base 2 so that the precision of the side surface and the opposing surface of the interface connector 1 is strict. Connector / base fixing screw hole 18 (FIG. 8)
Alternatively, the interface connector 1 may be fixed with the connector / base fixing screw 17 (FIGS. 8 to 10).

The connector positioning pin 2 is attached to the base 2.
1 (FIG. 11) is provided by press-fitting or bonding, a connector / base positioning hole 20 is provided in the interface connector 1, and the connector / base positioning hole 20 of the interface connector 1 is inserted into the connector positioning pin 21. With the interface connector 1 positioned, the interface connector 1 may be fixed to the connector / base fixing screw hole 18 (FIG. 11) with the connector / base fixing screw 17 (FIGS. 11 to 13).

Further, as shown in FIGS. 14 to 16, a member having a device fixing screw hole 19 for fixing the device, a member having a surface serving as a reference when positioning and fixing the device itself, and an interface. The main board 11 is mounted on a component that is formed integrally with the connector 1 to form a connector assembly 22, and is electrically connected to the interface connector 1. 22 is simultaneously fixed to the base 2 at the position of the board mounting hole (connector assembly) 23.

Further, the present invention includes the following specific configuration examples. A connector assembly having a member having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface when positioning and fixing the HDA, and the interface connector is integrated. Wherein the connector assembly and the main board are simultaneously screw-fixed to a base, and the interface connector of the connector assembly is formed of a form factor (which is a uniform standard for the outer shape of an HDD and is externally connected to a magnetic disk drive). (A rectangular parallelepiped shape).

The position error between the center of the screw hole for fixing the magnetic disk device itself to the host device and the end face on the front side of the interface connector is set to ± 0.4 mm or less.

A disk array system comprising a magnetic disk device fixed to an HDA in an area where the interface connector does not protrude from a form factor.

[0071]

According to the present invention, the problems of the conventional position adjustment work of the interface connector 34, the work jig, the potential of the disconnection, the unnecessary clearance between the HDAs, and the form factor are solved.

Further, it is possible to provide a magnetic disk device and another information recording / reproducing device, or a disk array and a RAID system, which achieve a large capacity or a small size, a high reliability, and a low price.

[Brief description of the drawings]

FIG. 1 is a sectional view of a magnetic disk drive according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an internal configuration of an HDA (a structure surrounded by a base 2 and a cover 15).

FIG. 3 is a view of FIG.
FIG. 3 is a diagram showing a positional relationship with an F connector 1.

FIG. 4 is a diagram in which an I / F connector is fixed to an HDA base with screws.

FIG. 5 is a side view in which an I / F connector is fixed to a base of the HDA with screws.

FIG. 6 is a diagram in which an I / F connector is adhered to an HDA base.

FIG. 7 is a side view in which an I / F connector is adhered to a base of an HDA.

FIG. 8 is a view in which a positioning groove for inserting and fixing an I / F connector in a base of the HDA is provided.

FIG. 9 is a view showing a state in which I / O is provided in a positioning groove provided on a base of HDA.
It is the figure which inserted and fixed the F connector.

FIG. 10 is a view showing a state in which a positioning groove provided on a base of an HDA
FIG. 6 is a side view in which the / F connector is inserted and fixed.

FIG. 11 is a diagram in which positioning pins for positioning an I / F connector are provided on a base of the HDA.

FIG. 12 is a diagram in which an I / F connector is fixed to an HDA with a positioning pin.

FIG. 13 is a side view in which an I / F connector is fixed to an HDA with a positioning pin.

FIG. 14 integrally forms a member having a device fixing screw hole for fixing a magnetic disk device (HDD), a member having a surface serving as a reference when positioning and fixing the HDA itself, and an interface connector. FIG. 2 is a diagram showing a connector assembly fixed to an HDA.

FIG. 15 is a view of FIG. 14 as viewed from the Z plane.

FIG. 16 is a view of the main board removed from FIG. 15 and viewed from the Z plane.

FIG. 17 shows a main board and I /
It is the figure which fixed the F connector.

FIG. 18 is a diagram illustrating positioning of an I / F connector according to the related art.

FIG. 19 is a side view showing positioning of an I / F connector according to the related art.

FIG. 20 is a conceptual diagram showing an upper case in which a magnetic disk device is mounted.

FIG. 21 is a conceptual diagram showing an upper case including a tray to which a magnetic disk device is attached and detached.

FIG. 22 is a conceptual diagram of attaching and detaching a magnetic disk device to and from a tray.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Interface connector 2 Base 3 Disk 4 Spindle motor 5 Disk spacer 6 Disk clamp 7 Head 8 Carriage 9 Voice coil motor 10 Coil 11 Main board 12 Board mounting screw hole 13 Sealed connector 14 FPC (flexible printed circuit board) fixing plate 15 Cover 16 Board fixing screw 17 Connector / base fixing screw 18 Connector / base fixing screw hole 19 Device fixing screw hole 20 Connector / base positioning hole 21 Connector positioning pin 22 Connector assembly 23 Board mounting hole (connector assembly) 24 Board / connector Fixing screw 25 Upper casing 26 Control device 27 Tray 28 System side connector 29 Tray fixing hole 30 Device fixing screw 31 Device relay connector 32 FPC (flexible printed circuit board) 33 read / write control board 34 conventional interface connector 35 conventional positioning pin hole 36 conventional positioning pin

Claims (4)

[Claims] An HDA (Head Disk Assembly) comprising a disk as a magnetic recording medium, a magnetic head for recording or reproducing information on or from the disk, a base and a cover enclosing the disk and the magnetic head, A main board having a circuit unit for controlling and sending and receiving information signals; and an interface connector for sending and receiving information signals and supplying power between a host device and the main board. A magnetic disk drive, wherein the main board is fixed to the base with screws, a plurality of fixing screw holes for attaching the magnetic disk device to a higher-level device are provided in the base, and the fixing screw holes are used as reference positions. To secure the position of the interface connector with high accuracy, Magnetic disk apparatus according to claim directly the base that has been screwed or adhesively secured to the itself. 2. An HDA comprising: a disk serving as a magnetic recording medium; a magnetic head for recording or reproducing information on or from the disk; a base and a cover enclosing the disk and the magnetic head; A magnetic disk drive comprising: a main board having a circuit unit for transmitting and receiving data; and an interface connector for transmitting and receiving information signals and supplying power between a host device and the main board. And fixing the main board to the base with screws, wherein the base is formed with a positioning groove for an interface connector including both side surfaces in a direction in which the interface connector is inserted and a facing surface facing the interface connector insertion; Insert the interface connector into the positioning groove of the base and determine the position. To a magnetic disk apparatus, characterized in that fixed to said base of said interface connector itself directly. 3. An HDA comprising: a disk as a magnetic recording medium; a magnetic head for recording or reproducing information on or from the disk; a base and a cover for sealing the disk and the magnetic head; A magnetic disk drive comprising: a main board having a circuit unit for transmitting and receiving data; and an interface connector for transmitting and receiving information signals and supplying power between a host device and the main board. Wherein a connector having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface when positioning and fixing the HDA, and the interface connector are integrally formed. An assembly is provided, and the connector assembly and the main board are simultaneously screw-fixed to a base. The gas disk device. 4. A disk array system in which the magnetic disk device according to claim 1, 2 or 3 is housed in a housing of a host device.