JP3650282B2 - Magnetic disk device and disk array system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a technique for accurately and easily mounting a magnetic disk device to a connector on the housing side when a plurality of magnetic disk devices are attached to and detached from a housing, and more particularly to accurate positioning of an interface connector of a magnetic disk device.
[0002]
[Prior art]
Conventionally, various items have been standardized for magnetic disk devices. 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, the arrangement of connection terminals in the connector, and information are transmitted. For example, an interface connector and an arrangement of terminals for transmitting and receiving signals.
[0003]
These standards are mainly unified by manufacturers who mount magnetic disk devices in their products in consideration of the convenience of handling magnetic disk devices by a plurality of manufacturers.
[0004]
On the other hand, regarding the size of the magnetic disk drive, since the first portable magnetic disk drive appeared, it was called “8-inch form factor size magnetic disk drive” to indicate the diameter of the disk medium used in the drive. The nickname has been used habitually. Here, the form factor size magnetic disk device is a unified standard for the outer size of the magnetic disk device. For example, a 3.5 inch form factor size magnetic disk device has a 2.5 inch form factor size. The magnetic disk device according to the unified standard has a relationship having a main surface twice as large as the main surface of the outer shape of the magnetic disk device.
[0005]
At present, a relatively small magnetic disk apparatus on the market is a 2.5-inch form factor size magnetic disk apparatus. In this apparatus, a disk medium having a diameter of 2.5 inches is mounted.
[0006]
In a large-capacity disk array system or RAID system equipped with a plurality of magnetic disk devices, generally, even when a failure occurs in a magnetic disk device and the magnetic disk device is replaced, the power of the system is turned off. It has a function that can be replaced without any change (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 referred to as such integration). Connector is also referred to as “interface connector”).
[0007]
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), the surface to be fixed to the upper casing (in FIG. 1) The position error of the interface connector is defined based on the (Z plane).
[0008]
What has been described above is the background art relating to the interface connector of the magnetic disk device. Next, a specific conventional technique for positioning the interface connector with respect to the magnetic disk device will be described with reference to FIGS. First, in FIGS. 17 to 22, 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, Coil, 11 is main board, 16 is board fixing screw, 19 is magnetic disk device fixing screw hole, 25 is upper casing (FIG. 20), 27 is tray (FIG. 21), 28 is system side connector, 30 is magnetic disk Device fixing screws (FIG. 22) and 34 represent conventional interface connectors, respectively.
[0009]
Here, the structure surrounded by the base 2 and the cover 15 is called HDA (Head Disk Assembly), and a combination of the HDA, the main board 11 and the conventional interface connector 34 is a magnetic disk device or HDD (Hard Disk Drive). ). The main board 11 is fixed to the HDA base 2 by the board fixing screws 16, and the conventional interface connector 34 is fixed to the main board 11 by soldering electric wiring and other screws.
[0010]
Further, in order to attach / detach the magnetic disk device to / from the upper housing 25, for example, a tray 27 may be interposed. According to FIG. 22, after fixing with the screw 30 and the device fixing screw hole 19 of the magnetic disk device. By attaching this tray to the upper casing 25, the conventional interface connector 34 of the magnetic disk device is electrically connected to the connector 28 of the upper casing 25 via the relay connector 31.
[0011]
Further, as another prior art relating to the positioning of the interface connector in the magnetic disk device, as shown in FIG. 1 of Japanese Patent Laid-Open No. 8-102169, the structure shown on the first page of Japanese Patent Laid-Open No. 10-40673. Some of them have an interface connector that protrudes outside the housing 1.
[0012]
[Problems to be solved by the invention]
According to the conventional structure of Japanese Patent Laid-Open No. 10-40673, the position accuracy is defined by the SCA-2 standard, and between the device fixing screw hole 19 provided in the base 2 and the conventional interface connector 34, 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. Further, a thickness error of the main board 11 occurs between the Z plane in FIG. 17 and the conventional interface connector 34.
[0013]
In the above-described conventional structure, there are many parts interposed between the device fixing screw hole 19 and the conventional interface connector 34 whose positional accuracy is defined by the SCA-2 standard. Therefore, the SCA-2 standard defines only with these accuracies. Since the accuracy cannot be satisfied, a position adjustment operation and an adjustment jig are necessary when fixing the main board 11 to the HDA. That is, the positional relationship between a magnetic disk device fixing screw hole (hereinafter referred to as a fixing screw hole) provided in the HDD for attaching the magnetic disk device (HDD) to the upper case and the HDD interface connector is strictly set. In this case, electrical and mechanical connection with the connector on the upper casing side is accurately performed, and compatibility of the HDD is ensured.
[0014]
In the present invention, it is an object of the present invention to eliminate the need for a conventional position adjustment operation and work jig for the interface connector 34 and to reduce the price of the magnetic disk device and other information recording / reproducing devices.
[0015]
When the magnetic disk device is fixed to the upper housing 25, if the positional error between the conventional interface connector 34 on the upper housing 25 side and the magnetic disk device side is large, it is impossible to smoothly insert the magnetic disk device. If the magnetic disk device is inserted into the upper casing 25 with both connectors having a large positional error, both connectors are fixed with a force applied in the insertion direction. The force applied to the conventional interface connector 34 directly connects the solder portion of the main board 11 (the main board and the interface connector (I / F connector)) by soldering. Part) and the fixing part to the main board 11 (the part fixing the I / F connector to the main board with screws or pins). .
[0016]
In a state where a force is applied to the main substrate 11 itself or a force is applied to the solder portion, there is a risk of disconnection of the element due to a crack of solder soldering the element on the main substrate 11.
[0017]
It is an object of the present invention to avoid the above potential (possibility) of disconnection and to increase the reliability of a magnetic disk device and other information recording / reproducing devices.
[0018]
In the method of fixing the conventional interface connector 34 to the main board 11, the conventional interface connector 34 is not in contact with the adjacent HDA (the conventional I / F connector 34 is provided with a gap between the HDA). It was necessary to provide clearance.
[0019]
An object of the present invention is to eliminate unnecessary clearances and further reduce the size or increase the capacity.
[0020]
According to Japanese Patent Laid-Open No. 8-102169, the conventional interface connector 34 is fixed outside the HDA. However, the magnetic disk device has the form factor, and only the conventional interface connector 34 has the form factor of the magnetic disk device. An implementation that does not protrude is not possible.
[0021]
In the present invention, the problem to be solved is to mount the interface connector 1 in a form factor (a main surface of a rectangular parallelepiped circumscribing the HDD).
[0022]
[Means for Solving the Problems]
In order to solve the above problems, the present invention mainly adopts the following configuration.
[0025]
Also, a disk that is a magnetic recording medium, a magnetic head that records or reproduces information on the disk, A read / write control board for controlling signals at the time of reading and writing of the magnetic head, a sealed connector for transmitting signals of the read / write control board, An HDA comprising a base and a cover for sealing the disk and the magnetic head;
A main board having a circuit unit for controlling the HDA and for sending and receiving information signals;
Information signal between the host device and the main board Give An interface connector for receiving and supplying power, and a magnetic disk device comprising:
A connector assembly in which a member having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface for positioning and fixing the HDA, and the interface connector are integrated. Provided,
The connector assembly and the main board are simultaneously HDA A magnetic disk unit that is screwed to the base.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
A magnetic disk device according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 16 and FIGS. 20 to 22 by exemplifying a magnetic disk device on which a 3.5-inch disk 3 is mounted.
[0027]
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 a 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 an FPC (flexible printed circuit board) fixing plate, 15 is a cover, 16 is a board fixing screw, 17 is a connector / base fixing Reference numeral 18 denotes a connector / base fixing screw hole, 19 denotes a magnetic disk device fixing screw hole (device fixing screw hole), 20 denotes a connector / base positioning hole, 21 denotes a connector positioning pin, 22 denotes a connector assembly, and 23 denotes a connector assembly. Board mounting hole (connector assembly), 24 is a board / connector fixing screw, 25 is an upper case, 26 is a control device, 27 Tray 28 is system side connector, the tray fixing hole 29, 30 the securing screw, 31 device relay connector, 32 FPC (flexible printed circuit board), 33 denotes each read write control substrate.
[0028]
FIG. 1 is a cross-sectional view of a magnetic disk device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an internal configuration of an HDA (a structure surrounded by a base 2 and a cover 15), and FIG. 1 is a diagram showing the positional relationship between the device fixing screw hole 19 and the I / F connector 1 when viewed from the Z plane, FIG. 4 is a diagram in which the I / F connector is screwed to the base of the HDA, and FIG. FIG. 6 is a side view of the I / F connector fixed to the HDA base with screws, FIG. 6 is a view of the I / F connector bonded to the HDA base, and FIG. 7 is a side view of the I / F connector bonded to the HDA base. FIG. 8 is a diagram in which a positioning groove for inserting and fixing the I / F connector in the base of the HDA is provided, and FIG. 9 is provided in the base of the HDA and the I / F connector is inserted in the positioning groove. Fig. 10 is provided on the base of the HDA. FIG. 11 is a side view in which the I / F connector is inserted and fixed in the positioning groove, FIG. 11 is a diagram in which positioning pins for positioning the I / F connector are provided on the base of the HDA, and FIG. 12 is a positioning pin. FIG. 13 is a side view of the I / F connector fixed to the HDA with positioning pins, and FIG. 14 is a device fixing screw hole for fixing the magnetic disk device (HDD). FIG. 15 is a diagram of a connector assembly formed by integrally molding a member having a connector, a member having a reference surface when positioning and fixing the HDA itself, and an interface connector, and is fixed to the HDA. 14 is a view as seen from the Z plane, and FIG. 16 is a view as seen from the Z plane with the main board removed from FIG.
[0029]
FIG. 17 is a diagram in which a main board and an I / F connector are fixed to an HDA in the prior art, FIG. 18 is a diagram showing positioning of the I / F connector in the prior art, and FIG. 19 is an I / F in the prior art. It is a side view which shows positioning of F connector.
[0030]
Further, FIG. 20 is a view showing an upper case in which the magnetic disk device is mounted, FIG. 21 is a view showing the upper case including a tray for attaching / detaching the magnetic disk device, and FIG. 22 is a view showing the magnetic disk device. It is a block diagram attached to or detached from a tray.
[0031]
A disk 3 (FIG. 1) that holds information magnetically and has aluminum as a substrate material and a magnetic film formed on the surface thereof is driven to rotate by a spindle motor 4. An electromagnetic coil is provided on the surface of the rotating disk 3 to convert between an electric signal and a magnetic field for floating information while magnetically writing or reading information while maintaining a constant space of only several tens of nanometers. There is a head 7 made of a material mainly composed 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.
[0032]
This head and carriage is a voice coil comprising a coil 10 wound with an aluminum wire or copper wire with an insulating film, a magnet of a permanent magnet, and a yoke for supporting this and forming a magnetic circuit. Driven and positioned by the motor 9.
[0033]
A signal at the time of reading / writing of the head 7 is transmitted to the FPC (flexible printed circuit board) 32 (FIG. 2) through the carriage 8 (not shown) by a fine wire of an electromagnetic coil provided on the head 7, and at the time of reading / writing of the head 7. The signal is transmitted to the outside of the HDA through a read / write control board 33 for controlling the above signal by a sealed connector 13 provided by adhering aluminum, stainless steel or iron located on the lower surface of the base 2 to the base 2. The hermetically sealed connector 13 relays an electrical signal between the inside and outside of the HDA, and is such that a plurality of pins for transmitting a signal and a molded part for holding the pin are completely sealed. .
[0034]
The drive current of the coil 10 is also transmitted to the sealed connector 13 through the FPC 32. 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 sealed connector 13 is transmitted to the main board 11 for controlling a device provided outside the HDA.
[0035]
The spindle motor 4 and the shaft of the carriage 8 and the voice coil motor 9 are fixed to the base 2 with screws, and a cover 15 (FIG. 1) made of aluminum, stainless steel or iron is sealed to keep the base 2 sealed. The base 2, the spindle motor 4, the carriage 8 shaft, and the voice coil motor 9 are fixed with screws via screws (not shown).
[0036]
In the HDA configured 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, inclusions enter this space and the magnetic path is moved. Since it must not be hindered, it must be kept clean at all times, so an internal filter (not shown) is provided, and internal dust is captured by the air circulation system inside the HDA generated by the rotation of the disk 3. ing.
[0037]
A large-capacity magnetic disk apparatus has a plurality of disks 3 mounted thereon in order to obtain a storage capacity, and a head 7 exists for each surface of the disk 3, so a disk spacer is provided between the disks 3 and 3. 5 (FIG. 1) is provided, and the distance between the head 7 and the head 7 is kept constant by finishing the head 7 mounting surface of the carriage 8 with high accuracy.
[0038]
As the form factor of the magnetic disk apparatus on which the 3.5-inch disk 3 is mounted, the a dimension 146 ± 0.5 mm, the b dimension 41.3 ± 0.5 mm in FIG. 1, and the c dimension 101.6 ± in FIG. The standard size is 0.5 mm, and the thin type has a b dimension of 25.4 (1 inch) ± 0.5 mm. In any case, all the above components must be mounted in this area.
[0039]
In addition, as the SCA-2 standard of a magnetic disk device on which a 3.5-inch disk 3 is mounted, a magnetic disk device fixing screw hole for fixing the magnetic disk device to the upper casing 25 (FIGS. 20 to 22). 3 is 41.28 ± 0.5 mm, which is the distance from the center of 19 to the insertion-side end face of the interface connector 1, and the perpendicularity between the X reference and the insertion-side end face of the interface connector 1 as the center of the c-dimension The tolerance h is 0.38 (0.015 inch) mm or less, and the outer width j of the insertion portion of the interface connector 1 with respect to the X reference, which is the center of the Z plane in FIG. Dimensional degree tolerance k is 1.02 (0.04 inch) mm or less, and the insertion port of the interface connector 1 with respect to the surface (the Z surface in FIG. 1) fixed to the upper housing 25 The positional tolerance e law g 1.02 (0.04 inches) mm or less, parallelism tolerances f must be the interface connector 1 is mounted with 0.38 (0.015 inches) mm following accuracy.
[0040]
Details of the magnetic disk device according to the embodiment of the present invention will be described below. In order to minimize each position error from the device fixing screw hole 19 for fixing to the upper casing 25 to the interface connector 1, it is necessary to reduce the number of parts interposed therebetween as much as possible.
[0041]
As shown in FIG. 1, the HDA base 2 provided with a device fixing screw hole 19 for fixing to the upper housing 25 (FIGS. 20 to 22), or a device fixing screw for fixing to the upper housing 25 The interface connector 1 is fixed to a member having a hole 19 or a member having a reference surface (Z plane in FIG. 1) for positioning and fixing the device.
[0042]
The assembly method is as follows. First, only electrical connection is made to the interface connector 1 of the main board 11, the interface connector 1 of the main board 11 is fixed to the base 2 of the HDA by the connector / base fixing screw 17 (FIG. 3), and then the main board. 11 is fixed to the HDA with a board fixing screw 16. FIG. 4 is a diagram showing details of mounting from the interface connector 1 insertion direction, and FIG. 5 is a side view of FIG.
[0043]
Accordingly, as shown in FIGS. 17 to 19, the mounting hole position error for fixing the main board 11 to the HDA in the conventional structure in which the conventional interface connector 34 is fixed only to the main board 11. In addition, the hole diameter error (mounting error of the main board 11) 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.
[0044]
According to the configuration examples of FIGS. 1 and 3 to 5 which are the embodiments of the present invention, only the error of fixing the interface connector 1 to the base 2 is caused.
[0045]
That is, in order to achieve the task of attaching the HDD to the upper case and accurately aligning the I / F connector 1 and the connector (31 or 28 in FIG. 22) on the upper case side, FIG. Thus, an accurate positional relationship between the device fixing screw hole 19 and the I / F connector 1 is required. Referring to FIG. 3, with the magnetic disk device fixing screw hole 19 as a reference position, the I / F connector 1 is positioned with high accuracy by measuring the distance i of the connector end, the inclination of the connector 1 (perpendicularity h), The positional deviation k of the connector 1 is defined. In order to satisfy such a specified value, in the embodiment of FIGS. 1 and 3 to 5 of the present invention, the I / F connector 1 is directly connected to the base of the HDA in which the device fixing screw hole 19 is implanted. The screw 17 is to be fixed.
[0046]
In the prior art of FIG. 17, the main board is attached to the HDA base and the I / F connector is attached to the main board. According to this, the terminal position of the I / F connector is viewed from the device fixing screw hole 19. And two mounting errors are included.
[0047]
Further, the interface connector 1 may be fixed to the base 2 by bonding (FIGS. 6 and 7) in addition to the above-described screw 17 fixing.
[0048]
Also, a positioning groove (j dimension portion in FIG. 8) is provided in the base 2 to tighten the accuracy of the side surface of the interface connector 1, and the interface connector 1 is applied in the X and Y axis directions in the drawing of the positioning groove. In this state, 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 groove of the base 2 is formed from both side surfaces in the direction in which the I / F connector is inserted and opposing surfaces facing the I / F connector insertion.
[0049]
Further, a connector positioning pin 21 (FIG. 11) made of stainless steel, iron, aluminum, plastic, or the like is provided in the base 2 by press-fitting or bonding, and a connector / base positioning hole 20 is provided in the interface connector 1 to provide an interface. With the connector / base positioning hole 20 of the connector 1 inserted into the connector positioning pin 21 and the interface connector 1 positioned, the interface connector 1 is inserted into the connector / base fixing screw hole 18 (FIG. 11). And may be fixed (FIGS. 11 to 13).
[0050]
As described above, by providing the positioning means for limiting the fixing position of the interface connector 1, workability and positioning accuracy when the interface connector 1 is fixed can be improved.
[0051]
Moreover, according to the above embodiment, the thickness error of the main board 11 from the Z plane of FIG. 1 to the interface connector 1 can be deleted.
[0052]
The error between the center of the device fixing screw hole 19 for fixing the interface connector 34 of the conventional interface connector 34 and 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 compared. Then, it becomes as follows.
[0053]
In the conventional method of mounting the interface connector 34 (FIG. 17), the main board mounting screw hole 12 (FIG. 8) (M2) from the center of the device fixing screw hole 19 (FIG. 3) of the base 2 for fixing to the upper casing 25. Error) is 0.1 mm. When the diameter of the board mounting screw hole 12 of the main board 11 is 2.5 ± 0.1 mm, the mounting error of the main board 11 is 0.3 mm from the calculation, and the conventional positioning pin of the conventional interface connector 34 from the board mounting screw hole 12 The position error up to the hole 35 (FIGS. 18 and 19) (2.4 ± 0.1 mm) is assumed to be ± 0.1 mm.
[0054]
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 0.25 mm from the calculation. Assuming that the error from the center of the conventional positioning pin 36 of the interface connector 34 to the insertion side end surface of the conventional interface connector 34 is ± 0.1 mm, in the conventional method of mounting the interface connector 34, at least the total error is 0.85 mm (2 An average value of multiplication is about 0.427).
[0055]
According to the mounting method of the interface connector 1 of the embodiment shown in FIGS. 11 to 13, from the center of the device fixing screw hole 19 of the base 2 (FIG. 11) for fixing to the upper casing 25 to the center of the connector positioning pin 21. The error is ± 0.1 mm. Main board 11 when connector positioning pin 21 has a diameter of 2 mm and a tolerance of 0 to +0.01 mm, and connector / base positioning hole 20 (FIGS. 12 and 13) of interface connector 1 has a diameter of 2.4 ± 0.1 mm. Assuming that the installation error of the interface connector 1 is 0.25 mm from the calculation and the error from the connector / base positioning hole 20 of the interface connector 1 to the insertion side end face of the interface connector 1 is ± 0.1 mm, it is shown in FIGS. According to the embodiment, at least the sum of errors is about 0.45 mm (the square sum average value is 0.278).
[0056]
Based on the above results, the total error from the center of the device fixing screw hole 19 of the base 2 (FIG. 11) for fixing to the upper casing 25 to the insertion side end face of the interface connector 1 is reduced by about 47% compared to the conventional case. It becomes possible. The tolerances of the parts used in the above calculations are in a general and common sense range with the current machining accuracy.
[0057]
Further, according to the embodiment shown in FIG. 11 to FIG. 13, the interface connector 1 insertion slot (g dimension in FIG. 1) with respect to the reference surface (Z surface in FIG. 1) when positioning and fixing the magnetic disk device. The degree of positioning e is ± 0.1 mm in the processing error from the Z surface of the base 2 to the interface connector 1 mounting surface, and ± 0 from the end surface of the interface connector 1 to one of the end surfaces of the insertion slot (g dimension in FIG. 1). .1 mm, even if the other surface is ± 0.1 mm, the total error is about 0.3 mm.
[0058]
According to the embodiment shown in FIGS. 11 to 13, the position of the interface connector 1 with respect to the device fixing screw hole 19 for fixing the device or the reference surface (Z surface in FIG. 1) when positioning and fixing the device. Since the accuracy can be ensured only by the accuracy of the components interposed therebetween, a position adjusting jig and adjustment work are not required.
[0059]
Next, as shown in FIGS. 14 to 16, a member having a device fixing screw hole 19 for fixing the magnetic disk device (HDD) and a reference surface when the magnetic disk device itself is positioned and fixed are provided. The main board 11 is mounted on a component that is a connector assembly 22 formed by integrally molding the member having the interface connector 1 and the interface connector 1, and is electrically connected to the interface connector 1. There is a method in which the board 11 and the connector assembly 22 are simultaneously fixed to the base 2 at the board mounting hole (connector assembly) 23 position.
[0060]
According to the embodiment shown in FIG. 11 to FIG. 13, at least the total sum of errors is about 0.45 mm (the square sum average value is 0.278), so that the center of the device fixing screw hole 19 for fixing the device is The position error with respect to the insertion side end face of the interface connector 1 can be set to ± 0.4 mm or less, and the product can be commercialized with sufficient accuracy without adjusting the position.
[0061]
As shown in FIG. 22, the magnetic disk apparatus described above inserts the interface connector 1 of the apparatus into the apparatus relay connector 31 fixed to the tray 27 of the upper casing 25, and uses the apparatus fixing screw 30 to tray the apparatus. 27. The system-side connector 28 is inserted on the opposite side of the device relay connector 31 from the side where the magnetic disk device is fixed. The tray 27 is inserted into the upper casing 25 (FIG. 20), and fixed to the upper casing 25 through the tray fixing screw hole 29 of the tray 27. The upper casing 25 is provided with a control device 26 for controlling the magnetic disk device.
[0062]
The above description is an example of a magnetic disk device on which a 3.5-inch disk 3 is mounted, but it can also be used for other information recording / reproducing devices. In addition, the current interface connector 1 is a connection method by electrical contact, but in the future, even when means for transmitting information signals in a non-contact manner can be realized by optical technology, the upper housing 25 Since the positioning accuracy of the information signal transmission units of both the information recording / reproducing apparatus and the information recording / reproducing apparatus is required, the use of the technical idea of this embodiment can solve the problem of the position errors of both.
[0063]
As described above, the present invention includes the following embodiments.
[0064]
As shown in FIGS. 1 to 5, the HDA base 2 provided with a device fixing screw hole 19 for fixing to the upper casing 25, or a device fixing screw hole 19 for fixing to the upper casing 25 is provided. The interface connector 1 is fixed to a member or a member having a reference surface (Z plane in FIG. 1) for positioning and fixing the magnetic disk device. Here, the method of fixing the interface connector 1 to the base 2 may be bonded (FIGS. 6 and 7) in addition to the above.
[0065]
In addition, a positioning groove (j dimension portion in FIG. 8) is provided in the base 2, and the accuracy of the side surface and the opposing surface of the interface connector 1 is made strict, and the interface connector in the X and Y axis directions of the positioning groove drawing. 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).
[0066]
Also, connector positioning pins 21 (FIG. 11) are provided in the base 2 by press-fitting or bonding, the 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 connected to the connector. The interface connector 1 is fixed to the connector / base fixing screw hole 18 (FIG. 11) with the connector / base fixing screw 17 (FIGS. 11 to 13) while the interface connector 1 is positioned by being inserted into the positioning pins 21. May be.
[0067]
14-16, the member which has the apparatus fixing screw hole 19 which fixes an apparatus, the member which has a surface used as a reference | standard when positioning and fixing an apparatus itself, and the interface connector 1 Are integrally molded to form a connector assembly 22, the main board 11 is mounted and electrically connected to the interface connector 1, and the board fixing screws 16 are used to connect the main board 11 and the connector assembly 22 to the board. At the same time, the fixing holes (connector assemblies) 23 are fixed to the base 2.
[0068]
Furthermore, the present invention includes the following specific configuration examples.
A connector assembly in which a member having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface for positioning and fixing the HDA, and the interface connector are integrated. Providing and fixing the connector assembly and the main board to the base at the same time,
The interface connector of the connector assembly is provided in an area that does not protrude from a form factor (a standard for the outer shape of the HDD and a rectangular parallelepiped shape that circumscribes the magnetic disk device).
[0069]
The positional error between the center of the screw hole for fixing the magnetic disk device itself to the host device and the end surface on the insertion side on the front side of the interface connector should be ± 0.4 mm or less.
[0070]
A disk array system comprising a magnetic disk device in which the interface connector is fixed to the HDA in an area that does not protrude from the form factor.
[0071]
【The invention's effect】
According to the present invention, the problems of the conventional position adjustment work and work jig of the interface connector 34, the problem of disconnection potential, the problem of unnecessary clearance between HDAs, and the problem of form factor are solved.
[0072]
Furthermore, it is possible to provide a magnetic disk device and other information recording / reproducing device, a disk array and a RAID system which have been increased in capacity, size, reliability, and cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a magnetic disk device according to an embodiment of the present invention.
FIG. 2 is a cross-sectional view showing an internal configuration of an HDA (a structure surrounded by a base 2 and a cover 15).
FIG. 3 is a diagram showing a positional relationship between the device fixing screw hole 19 and the I / F connector 1 when FIG. 1 is viewed from the Z plane.
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 an HDA base with screws.
FIG. 6 is a diagram in which an I / F connector is bonded to an HDA base.
FIG. 7 is a side view in which an I / F connector is bonded to an HDA base.
FIG. 8 is a view in which a positioning groove for inserting and fixing an I / F connector in the base of the HDA is provided.
FIG. 9 is a diagram showing an I / F connector inserted into a positioning groove provided on the base of the HDA and fixed.
FIG. 10 is a side view of the HDA base, in which an I / F connector is inserted and fixed in a positioning groove.
FIG. 11 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 positioning pins.
FIG. 13 is a side view in which the I / F connector is fixed to the HDA with positioning pins.
FIG. 14 integrally forms a member having a device fixing screw hole for fixing a magnetic disk device (HDD), a member having a reference surface for positioning and fixing the HDA itself, and an interface connector. It is the figure fixed to HDA as a connector assembly.
FIG. 15 is a view of FIG. 14 as viewed from the Z plane.
16 is a view of the main board removed from FIG. 15 as viewed from the Z plane.
FIG. 17 is a diagram in which a main board and an I / F connector are fixed to an HDA in the prior art.
FIG. 18 is a diagram showing positioning of an I / F connector in the prior art.
FIG. 19 is a side view showing positioning of an I / F connector in the prior art.
FIG. 20 is a conceptual diagram showing an upper casing in which a magnetic disk device is mounted.
FIG. 21 is a conceptual diagram showing an upper casing including a tray to which a magnetic disk device is attached and detached.
FIG. 22 is a conceptual diagram of attaching / detaching a magnetic disk device to / from a tray.
[Explanation of symbols]
1 Interface connector
2 base
3 discs
4 Spindle motor
5 Disc spacer
6 Disc clamp
7 heads
8 Carriage
9 Voice coil motor
10 coils
11 Main board
12 Board mounting screw holes
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 case
26 Control device
27 trays
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 (2)

A disk that is a magnetic recording medium, a magnetic head that records or reproduces information on the disk, a read / write control board that controls a signal at the time of reading and writing of the magnetic head, a sealed connector that transmits a signal of the read / write control board, An HDA having a base and a cover for sealing the disk and the magnetic head;
A main board having a circuit unit for controlling the HDA and for sending and receiving information signals;
An interface connector for exchanging information signals and supplying power between a host device and the main board, and a magnetic disk device comprising:
A connector assembly in which a member having a fixing screw hole for fixing the magnetic disk device to a host device, a member serving as a reference surface for positioning and fixing the HDA, and the interface connector are integrated. Provided,
The magnetic disk apparatus, wherein the connector assembly and the main board are simultaneously screw-fixed to the base of the HDA. A disk array system in which the magnetic disk device according to claim 1 is housed in a casing of a host device.

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