JPS6376166A - Disk driving device - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to execute the reduction in costs by attaching and detaching freely a cartridge part composed by housing a magnetic disk, a swing arm, the rotor part of a motor and so forth into an enclosure, to a driving part equipped with the stator part of the motor and so forth. CONSTITUTION:To a driving base 21 connected to external equipment, a cartridge part 20 is freely attached and detached. When the cartridge part 20 is loaded, a projected part 32 of the driving base 21 is fitted into a recessed part 28 and positioned. When the cartridge part 20 is positioned, an output side transformer 29 and an input side transformer 33 are faced and a transforming type signal transfer can be executed. Driving magnets 24 and 26 are respectively faced through a bottom cover 23 to driving coils 30 and 31 and the prescribed driving force can be transferred to a magnetic disk 1 and a swing arm 8. Thus, a circuit substrate 6, a frame 7, the driving coils 30 and 31, etc., can be excluded from an exchange block and the number of parts is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk drive device that records and reproduces information on and from an information recording medium formed in a disk shape.

[Conventional technology]

An example of a disk drive device using a disk-shaped recording medium is shown in FIG. 3, for example.

The disk drive device shown in the figure records information.

a magnetic disk 1 as a recording medium; a magnetic head 2 for recording and reproducing information on the magnetic disk 1; a spindle motor 3 for rotationally driving the magnetic disk 1; a head transport mechanism 4 for moving to a predetermined track on the magnetic disk 1;
a housing 5 that houses the magnetic head 2 and the like, and to which the spindle motor 3 and head transfer mechanism 4 are attached; a top cover (not shown) that seals the housing 5; and a circuit board 6 on which a motor control circuit and the like are formed. and,
It mainly consists of a frame 7 for attaching the circuit board 6 to the housing 5.

In this disk drive device, two magnetic disks 1 are provided, and in order to perform double-sided recording on one magnetic disk 1, a total of four magnetic heads 2 are provided, one on each side, and a head transfer mechanism is provided. It is attached to the swing arm 8 of No. 4 via a cantilevered support spring. The head transfer mechanism 4 includes the swing arm 8, a steel belt 9 attached to the end of the swing arm 8 on the side where the anti-magnetic head is attached, a pulley 10 around which the middle part of the steel belt 9 is wound, and a stepping motor. 11, and by inserting and fixing the Boo+J 10 around which the steel belt 9 is wound onto the drive shaft 12 of the stepping motor 11, and driving the stepping motor 11, the swing arm 8 is moved to the pivot shaft. It can swing around 8a.

Magnetic disk 1. Magnetic head 2. Swing arm 8. The housing that houses the steel belt 9, pulley 1o, etc.
Consisting of the housing 5 and a top cover (not shown), a gasket is used at the contact area between the housing 5 and the top cover and at the mounting area of the stepping motor 11 to maintain airtightness, and a magnetic material is used at the shaft portion of the spindle motor 3. Filled with fluid. In addition, a part of the housing 5 includes
An opening is formed to equalize the air pressure inside and outside the airtight chamber 5a, and a filter 13 is provided in this opening to prevent dust from entering into the airtight chamber 5a.

The frame 7 is used for attachment to external equipment and is also used for attaching the housing 5. That is, the housing 5 is attached to the frame 7 via the vibration isolating rubber 14, and the circuit board Fi6 is attached to the side opposite to the side where the housing 5 is attached. Also, frame 7
A bezel 15 equipped with a louver for ventilation and a display device such as an LED is attached to the side surface of the bezel 15 .

[Problem that the invention seeks to solve]

By the way, in the conventional disk drive device configured as described above, the entire device is used as one exchange block, and this is connected to an external storage device etc., so it is difficult to reduce the cost per exchange block. Naturally, there were limits.

In other words, if the minimum necessary parts are housed and sealed in the housing of each replacement block, and parts that do not need to be sealed are configured so that they can be used for each replacement block, product costs can be significantly reduced. it is conceivable that.

Further, in the conventional disk drive device described above, it is necessary to fill the shaft portion of the spindle motor 3 with an expensive magnetic fluid, which also causes an increase in cost.

The present invention has been made in view of the above-mentioned problems and demands, and its purpose is to provide a disk drive device that can significantly reduce product costs.

[Means for solving problems]

In order to achieve the above object, the present invention includes a medium unit integrally equipped with a rotary-driven rotor f9, a rotation support unit of the medium unit, and a driven-side magnet for head transfer. a cartridge section housing a head section, a transfer support section for the nuclear head section, and a first signal transmission means for transmitting recording/reproduction signals of the head; and a first drive for rotationally driving the rotor magnet. a coil part and a second part that drives the magnet to be transferred;
A drive coil section and a drive section including a second signal transmission means paired with the first signal transmission means are formed separately, and when the cartridge section is attached to the drive section, In the above, the rotor magnet is connected to the first drive coil portion,
Further, the magnets are arranged to face the second drive coil portions, respectively.

[Effect]

According to the above means, the drive coil section of the motor is provided on the drive section side, and any cartridge section can be attached to and detached from the drive section, so that the cartridge section, which is a replacement block, can be replaced with the minimum number of parts. Can be configured. Further, since the shaft portion of the rotation support portion is housed within the housing of the cartridge portion and airtightness can be ensured, there is no need to fill this shaft portion with expensive magnetic fluid.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show an embodiment of a disk drive device according to the present invention, FIG. 1 is a sectional view, and FIG. 2 is a plan view, and the parts that can be considered to be equivalent or equivalent to those in FIG. 3 are shown. are given the same reference numerals, and redundant explanations will be omitted as appropriate.

As shown in FIGS. 1 and 2, this disk drive device is constructed by combining a cartridge section 20 and a drive base 21 which is a drive section. The cartridge section 20 includes a magnetic disk 1, a medium section consisting of a drive magnet 24 and a shaft 25 which are the rotor section of the spindle motor 3, a swing arm 8, and a stepping motor 11 in a case consisting of a housing 22 and a bottom cover 23. A head section consisting of a drive magnet 26 and a shaft 27, which is a rotor section, is accommodated, and the side surface of this cartridge section 20 has a recess 28 for positioning, and an input side as a second signal transmission means to be described later. An output-side transformer 29 is provided as a first signal transmission means that pairs with the transformer 33 .

On the other hand, the drive base 21 has a first drive coil 30 which is the stator part of the spindle motor 3 and a second drive coil 31 which is the stator part of the stepping motor 11 on the circuit board 6 attached to the frame 7. is fixed thereto, and a protrusion 32 for positioning the cartridge portion 20 and an input transformer 33 that pairs with the output transformer 29 are provided at a predetermined position on the frame 7. In addition, the reference numerals 34 and 35 in the figure indicate bearings as a rotation support part and a transfer support part, respectively, which pivotally support the shaft 25 and 27, and 36 indicates a mounting screw.

In the disk drive device having the above configuration, the cartridge section 20 is removably attached to the drive base 21 connected to an external device, and when the cartridge section 20 is installed, the drive base is inserted into the recess 28. Positioning is performed by fitting the convex portion 32 of the base 21. Then, when the cartridge section 20 is positioned, the output side transformer 29
and the input side transformer 33 face each other to form a known transformer type 1.
No. 3 transmission is possible, and the drive magnet 24°2
6 is connected to the drive coil 30 via the bottom cover 23.
．． 31, it is possible to transmit a predetermined driving force to the magnetic disk 1 and the swing arm 8. That is,
Since the driving magnet 24 is disposed above and facing the driving coil 30, the rotational driving force of the spindle motor 3 is transmitted to the magnetic disk 1, and on the other hand, since the outer peripheral surface of the driving magnet 26 faces the driving coil 31 over half a circumference, The rotational driving force of the stepping motor 11 is transmitted to the swing arm 8, and the swing arm 8 moves twice to move the magnetic head 2 approximately in the radial direction of the magnetic disk 1.

In this way, the disk drive 'ATL is connected to the cartridge section 2.
The circuit board 6, frame 7, drive coils 30, 31, etc. can be replaced as they are divided into a drive base 21 and a drive base 21. can be excluded from blocking,
The number of parts per replacement block is reduced, and product costs can be reduced. In addition, the shaft part of the spindle motor 3,
In other words, since the shaft 25 and the bearing 34 are sealed within the housing of the cartridge section 20, there is no need to fill this shaft portion with expensive magnetic fluid. Furthermore, since this embodiment employs a transformer-type signal transmission means, the output transformer 29 can transmit signals without contacting the input transformer 33, and when the cartridge section 20 is installed, this signal transmission section does not require high positioning accuracy.

In the above embodiment, the drive coil 3 is located at a position facing the outer peripheral surface of the drive magnet 26 of the stepping motor 11.
1, but it is also possible to install the drive coil 31 at a position facing the bottom surface of the drive magnet 26.

Further, a magnet for rotation control may be attached to the drive magnet section of the medium rotating means, and a detection coil for rotation control may be attached to the drive coil section. Furthermore, in the above embodiment, the recording medium in the cartridge section is composed of one sheet, but
It is also possible to use a plurality of sheets in accordance with an increase in storage capacity.

〔Effect of the invention〕

As explained above, in the disk drive device according to the present invention, the cartridge section, which houses the magnetic disk, the swing arm, the rotor section of the motor, etc. in the housing, is connected to the drive section, which includes the stator section of the motor, etc. Since it is removable, the cartridge part, which is a replacement block, can be constructed with the minimum necessary parts, and there is no need to fill the spindle motor shaft with expensive magnetic fluid, resulting in significant cost reductions. It becomes possible to realize this.

[Brief explanation of the drawing]

1 and 2 show an embodiment of a disk drive device according to the present invention, FIG. 1 is a sectional view, FIG. 2 is a plan view, and FIG. 3 is an example of a conventional disk drive device. It is an exploded perspective view. 1...Magnetic disk, 2...Magnetic head, 3...
Spindle motor, 6... Circuit board (reverse, 8... Swing arm, 11... Stepping motor, 20...
・Cartridge part, 21... Drive gain, 22... Housing, 23... Volume cover, 24.26...
・Drive magnet, 25.27...Shaft, 28・
... recess, 29... output side transformer, 30.31...
- Drive coil, 32... Convex portion, 33... Input side transformer.

Claims (1)

[Claims] A medium section integrally equipped with a rotor magnet that is rotationally driven, a rotation support section for the medium section, a head section integrally equipped with a driven-side magnet for transferring the head, and a transfer support section for the head section. and a first signal transmitting means for transmitting recording/reproducing signals of the head; a first drive coil section for rotationally driving the rotor magnet; and a second drive coil section for driving the rotor magnet. a drive coil section and a drive section comprising a second signal transmission means paired with the first signal transmission means are formed separately, and when the cartridge section is mounted on the drive section. . A disk drive device, wherein the rotor magnet is disposed facing a first drive coil portion, and the magnet is disposed facing a second drive coil portion.