JPH087551A - Recording disk drive - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent dust from flowing into the equipment, keep the airtightness, have good resistance to disturbance, and facilitate disassembly and replacement. [Structure] A chassis 1 containing a drive mechanism such as a spindle motor 5, a movable optical head 6 and a linear motor 7 and a base plate 10 containing a loading mechanism for loading a magneto-optical disk 4 are separated by screws 30 and 31. As much as possible, the inner peripheral portion of the mounting opening 18 provided on the base plate 10 is brought into contact with the vertical and horizontal side surfaces of the step-down portion 21 provided on the projecting peripheral portion 20 of the chassis 1 so that the chassis 1
It is possible to improve dustproof performance while maintaining rigidity without lowering the height.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording disk drive device for driving a recording disk such as an optical disk or a magneto-optical disk for recording / reproduction.

[0002]

2. Description of the Related Art Conventionally, in a magneto-optical disk drive device and the like, a recording disk exchange type is equipped with a mechanism for exchanging recording disks, so that there are many parts that communicate the inside and outside of the mounting, and the outside air flows into the mounting inside. Then, the dust contained in the outside air sometimes adheres to the optical parts and the like that form the optical head. The adhesion of the dust deteriorates the optical characteristics of the optical component, deteriorates the detection signal, and causes a problem such as a data error.

In order to solve the above problems, Japanese Patent Laid-Open No. 3-11
The optical disk drive device disclosed in Japanese Patent No. 3792 discloses a chassis having an access (drive) mechanism including an optical head unit and a loading mechanism, a chassis cover for closing the chassis, and an opening / closing door when a recording disk is mounted. A closed structure was constructed by and to prevent the inflow of dust.

Further, the loading mechanism and the access mechanism are installed so as to be separable from each other, and a flexible seal member is interposed between the joint surfaces of both mechanisms to maintain hermeticity and disassemble.
An optical disk drive device that can be easily replaced is also provided.

[0005]

In the above-mentioned conventional technique, the former optical disk drive has good sealing performance, but since the access mechanism and the loading mechanism are integrally assembled, either When a failure occurs in the mechanism, only the relevant mechanism cannot be replaced, which causes a problem in terms of service and maintenance.

On the other hand, the latter optical disk drive device is easy to disassemble and replace while maintaining hermeticity, and is excellent in terms of service and maintenance. However, in order to make the device thinner, only the thickness of the seal member is required. , The height of the chassis equipped with the mechanism is low, and the lower the height, the weaker the rigidity of the chassis becomes, and the weaker it becomes against external disturbance such as impact. In addition, the cost is increased because the seal member is used,
Moreover, there is a problem that the assembling property of the seal member is not good.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a recording disk drive device which keeps airtightness in order to prevent dust from flowing into the device, has good disturbance resistance, and is easy to disassemble and replace.

[0008]

In order to achieve the above-mentioned object, the present invention provides a loading mechanism for retracting a disk cartridge containing a recording disk and positioning it at a predetermined position, and a disk mechanism at the predetermined position. In a recording disk drive device in which a drive mechanism for recording / reproducing with respect to a recording disk is separably joined, one of a joint portion between a storage frame body of the loading mechanism and a storage frame body of the drive mechanism Is provided with a stepped-down portion on the outer peripheral portion thereof, and the other side is provided with a mounting opening for contacting the inner peripheral portion with the vertical side surface and the horizontal side surface of the stepped-down portion.

Further, a bent end portion is formed in a peripheral portion of the mounting opening so that the inner peripheral portion abuts substantially the entire outer surface of the stepped portion.

In the recording disk drive device,
A step drop portion is provided on the outer peripheral portion of one of the joints between the storage frame body of the loading mechanism and the drive mechanism, and a mounting opening for contacting the inner peripheral portion on the side surface of the step drop portion is provided on the other side. And a plate member provided with a fitting opening substantially the same as the outer peripheral portion so as to be fitted to the outer peripheral portion of the stepped-down portion so as to sandwich the storage frame body provided with the mounting opening. It is characterized in that it is fixed to the storage frame body provided with the step-down portion.

In the recording disk drive device,
The other flat portion is brought into contact with the upper surface of the projecting peripheral portion provided at one of the joints between the storage frame body of the loading mechanism and the storage frame body of the drive mechanism, and the projecting peripheral portion is attached to the end of this flat portion. It is characterized in that a bent portion is provided in contact with the inner side surface of the portion.

[0012]

In the recording disk drive device according to the present invention having the above-mentioned structure, the loading mechanism and the drive mechanism are separably joined together, so that they can be easily disassembled and replaced. The stepped-down portion is provided on one of the storage frame bodies, and the mounting opening with which the inner peripheral portion abuts on the vertical side surface and the horizontal side surface of the stepped-down portion is provided on the other side so that both storage frame bodies are joined. Therefore, the inflow of dust from the joint portion can be prevented without using a sealing member, and the height of the storage frame can be ensured, so that it is resistant to disturbance.

Further, by forming a bent portion so as to contact along the entire side surface of the stepped-down portion or the projecting peripheral portion on the storage frame body on the side of the joined portion which is joined to the stepped-down portion or the projecting peripheral portion, The airtightness is improved and the dustproof performance is improved.

Further, a plate member provided with a fitting opening substantially the same as the outer peripheral portion of the stepped-down portion is fitted to the stepped-down portion at the joining portion, and is coupled so as to sandwich one storage frame body. Therefore, the rigidity of the storage frame is improved, and the sealing property is improved only in the portion where the plate member is fitted to the stepped-down portion, and the dustproof performance is further improved.

[0015]

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

FIG. 1 is an exploded perspective view of a first embodiment of the present invention, in which a circuit board 2 is fixed to a lower portion of a chassis 1 which is a first housing frame in which a drive unit described below is mounted, and a chassis 1 A spindle motor 5 for rotating a magneto-optical disk 4 which is a recording disk housed in a disk cartridge 3, a movable optical head 6, and a pair of linear motors 7 for moving the movable optical head 6 in the disk radial direction.
And are installed.

Further, a fixed optical head 8 is provided on a side portion of the chassis 1 for inputting and outputting a light beam to and from the movable optical head 6.
Is fixed, and the opening of the through hole on the lower surface of the chassis 1 is closed by the circuit board 2.

The loading mechanism for retracting the disk cartridge 3 and positioning it at a predetermined position includes a base plate 10 which is a second storage frame and a magnetic field coil 11.
A well-known loading unit that is rotatably provided
The base plate 10 includes a front cover 15 having a cartridge insertion opening 13 and an insertion opening opening / closing door 14, a rear cover 16 installed behind the loading mechanism, and an upper surface of the loading unit 12. The top cover 17 is attached.

The loading mechanism includes a front cover
By attaching the back cover 16, the rear cover 16, and the top cover 17 with screws or the like, the base plate 10 is hermetically sealed except for the rectangular mounting port 18 formed on the lower surface thereof.

The chassis 1 and the base plate 10 are
The driving mechanism and the loading mechanism are integrated in a substantially completely sealed state by being separably joined by a screw or the like.

At the time of recording / reproducing, the magneto-optical disk 4 is rotationally driven by the spindle motor 5 with the disk cartridge 3 set at a predetermined position. A magnetic field is applied to the recording surface of the rotating magneto-optical disk 4 by the magnetic field coil 11, and the light beam emitted from the fixed optical head 8 is focused as a beam spot through the movable optical head 6 to generate a magneto-optical field. The recording surface of the disk 4 is illuminated. The movable optical head 6 is moved in the radial direction of the magneto-optical disk 4 by the linear motor 7, and the beam spot irradiates the entire recording surface.

Further, the light beam reflected from the recording surface of the magneto-optical disk 4 enters the fixed optical head 8 through the movable optical head 6 and detects information as is known by a light detecting section (not shown).

FIG. 2 is a cross-sectional view of a main part in the first embodiment of FIG. The peripheral portions (side end surface and back surface) 18a and 18b are in contact with the vertical side surface 21a and the horizontal side surface 21b of the stepped portion 21.

The depth L of the step drop portion 21 is sufficiently larger than the thickness T of the base plate 10, and the step drop portion 21 and the mounting port
The size 18 and the size 18 can be fitted with each other. Therefore,
The chassis 1 and the base plate 10 are in close contact with each other at the vertical side surface portion and the horizontal side surface portion, and are joined together in a state where the gap is extremely small, so that it is possible to make the intrusion of dust from this joint portion extremely small. Even if the dust invades, the amount of dust that reaches the movable optical head 6 over the projecting peripheral portion 20 of the chassis 1 where the stepped-down portion 21 is formed is further reduced, so that the dust causes a data error. Will be less.

Further, the chassis 1 has a projecting peripheral portion 20 and a stepped portion.
Although 21 is formed, the depth (height) L of the stepped-down portion 21 can be sufficiently taken, so that the rigidity is correspondingly increased and it is resistant to disturbance. By increasing the height L, the rigidity and dustproof performance of the chassis 1 can be improved.

Reference numeral 25 in FIG. 2 is an insulating sheet, and the circuit board 2 and the chassis 1 are screwed through the insulating sheet 25.
By fixing with 32 or the like, it is possible to close the opening of the through hole on the lower surface of the chassis 1 without causing a short circuit in the circuit board 2.

Referring to FIG. 1, the chassis 1 of the drive mechanism, the base plate 10 of the loading mechanism and the loading
A method of joining with the unit 12 will be described.

First, the base plate 10 and the loading unit 12 are the four standing arm portions 10a of the base plate 10.
The screw holes 10b and the four screw holes 12a of the loading unit 12 are fixedly connected by screws 30 to each other. Then, a screwing tool is inserted through the tool insertion holes 12b formed in the connected loading unit 12, and the four screw holes 10c of the base plate 10 and the screw holes 1a of the chassis 1 are respectively screwed with the screws 31. It is firmly fixed and connected.

When disassembling, the screws 30 and 31 may be removed. Therefore, the assembly and disassembly are easy, and the service and maintenance are excellent.

FIG. 3 is a perspective view showing a modified example of the base plate of the first embodiment.
A bent end portion 40 is formed so as to cut and raise the peripheral portion of the mounting opening 18, and as shown in the cross-sectional view of FIG. 4, the inner surface of the bent end portion 40 is a vertical side surface 21 a of the step-down portion 21. I am trying to join it.

Therefore, the contact area between the inner peripheral portion of the mounting opening 18 of the base plate 10 and the stepped-down portion 21 of the chassis 1 is increased, the sealing degree is increased, and the dustproof performance is further improved.

FIG. 5 is an exploded perspective view of the essential parts of the second embodiment of the present invention, and FIG. 6 is a sectional view of the assembled state of the second embodiment. This second embodiment is shown in FIGS. The difference from the first embodiment is that the plate member 46 is provided with a fitting port 45 that is substantially the same as the outer shape of the step-down part 21 of the chassis 1, and the fitting port 45 is fitted to the step-down part 21. Then, the inner peripheral portion of the mounting opening 18 of the base plate 10 is sandwiched and fixed by the plate member 46 and the horizontal side surface 21b of the stepped-down portion 21.

By using the plate member 46, the plate member 46 can be used as a reinforcing member to improve the rigidity, and at the same time, the step-down portion
Since the contact area of the vertical side surface 21a of 21 is increased, the dustproof performance is also improved. As a material for the plate member 46, a metal material is preferably used when importance is attached to rigidity, and a plastic material having elasticity is preferably used in order to improve fitting with the chassis 1.

FIG. 7 is an exploded perspective view of an essential part of the third embodiment of the present invention, and FIG. 8 is a sectional view of the assembled state of the third embodiment. This third embodiment is shown in FIGS. The difference from the first embodiment is that the projecting peripheral portion 20 of the chassis 1 does not have a step drop portion, but the mounting opening 18 formed in the lower flat portion of the base plate 10.
A downward bent portion 50 is provided at the inner peripheral end of the base plate 10, the peripheral portion of the mounting opening 18 of the base plate 10 is placed on the protruding peripheral portion 20 of the chassis 1, and the downward bent portion 50 is in contact with the inner side surface of the protruding peripheral portion 20. It is in the configuration.

With the above-mentioned structure, the same effects as those of the first and second embodiments can be obtained, but the manufacturing cost can be reduced because the step-drop portion 21 need not be formed.

Depending on the specifications, the first, second, third
It is also conceivable that the projecting peripheral portion 20 or the step-down portion 21 in the embodiment is provided on the base plate 10 and the mounting opening 18 is provided on the chassis 1.

[0037]

As described above, according to the recording disk drive device of the present invention, according to the structure of claim 1, the loading mechanism and the drive mechanism are separable and can be easily disassembled and replaced. At the joint part of the mechanism, the stepped-down portion provided on one side of the storage frame and the mounting opening provided on the other side can be brought into contact with each other in a sealed state, which is excellent in dustproof performance, and the height of the storage frame is also secured. Therefore, the rigidity is not reduced and it is strong against external disturbance.

According to the second aspect of the present invention, the inner peripheral portion of the mounting opening comes into contact with the substantially entire outer surface of the step-down portion at the bent portion, so that the dustproof performance is further improved. You can

According to the third aspect of the present invention, at the joining portion of the storage frame bodies of the two mechanisms, a plate member fitted to the stepped-down portion provided on one of the storage frame bodies is used for the other storage frame body. By fixing both storage frame bodies by sandwiching the body, the rigidity of the storage frame body is increased and it is resistant to disturbance, and the sealing property is improved by the amount of fitting with the stepped-down portion of the plate member, and dustproof Performance is improved.

According to the structure described in claim 4, at the joint portion of the storage frame bodies of the both mechanisms, the stepped-down portion is not provided on one projecting peripheral portion of the storage frame body, and By providing the bent portion in contact with the inner side surface of the protruding peripheral portion, the dustproof performance can be improved without lowering the rigidity of the storage frame.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of a recording disk drive device of the present invention.

FIG. 2 is a sectional view of an essential part of the first embodiment.

FIG. 3 is a perspective view showing a modified example of the base plate in the first embodiment.

FIG. 4 is a cross-sectional view of an assembled state of the base plate of FIG.

FIG. 5 is an exploded perspective view of essential parts in a second embodiment of the present invention.

FIG. 6 is a sectional view of an essential part of the second embodiment.

FIG. 7 is an exploded perspective view of essential parts in a third embodiment of the present invention.

FIG. 8 is a sectional view of an essential part of the third embodiment.

[Explanation of symbols]

1 ... Chassis (first storage frame), 2 ... Circuit board, 3
… Disk cartridge, 4… Magneto-optical disk, 5
… Spindle motor, 6… Movable optical head, 7… Linear motor, 8… Fixed optical head, 10… Base plate
(Second storage frame), 12 ... loading unit,
15 ... Front cover, 16 ... Rear cover, 17 ... Top cover, 18 ... Mounting opening, 40 ... Bend end, 45 ... Fitting opening, 46 ... Plate member, 50 ... Downward bending section.

Claims (4)

[Claims] 1. A loading mechanism for retracting and positioning a disc cartridge accommodating a recording disc at a predetermined position, and a drive mechanism for recording / reproducing with respect to the recording disc in the disc cartridge at the predetermined position. In a recording disk drive device in which the storage frame of the loading mechanism and the storage frame of the drive mechanism are joined to each other in a separable manner, a step-down portion is provided on the outer periphery of one of the joint portions, and the step-down portion is provided on the other side. A recording disk drive device, characterized in that a mounting opening for contacting an inner peripheral portion is provided on a vertical side surface and a horizontal side surface of the portion. 2. The bent end portion is formed in the peripheral portion of the mounting opening so that the inner peripheral portion abuts substantially the entire outer surface of the stepped portion. Recording disk drive. 3. A loading mechanism for retracting and positioning a disc cartridge accommodating a recording disc at a predetermined position, and a drive mechanism for recording / reproducing with respect to the recording disc in the disc cartridge at the predetermined position. In a recording disk drive device in which the storage frame of the loading mechanism and the storage frame of the drive mechanism are joined to each other in a separable manner, a step-down portion is provided on the outer periphery of one of the joint portions, and the step-down portion is provided on the other side. The plate member is provided with a mounting opening with which the inner peripheral portion abuts on the side surface of the portion, and a fitting opening substantially the same as the outer peripheral portion is provided so as to be fitted on the outer peripheral portion of the stepped portion. A recording disk drive device, characterized in that the storage frame body having a mounting opening is fixed to the storage frame body provided with the step-down portion so as to sandwich the storage frame body. 4. A loading mechanism for retracting and positioning a disc cartridge containing a recording disc at a predetermined position, and a drive mechanism for recording / reproducing with respect to the recording disc in the disc cartridge at the predetermined position. In the recording disk drive device in which the above is separably joined, the other flat portion is provided on the upper surface of the projecting peripheral portion provided in one of the joining portions of the housing frame body of the loading mechanism and the housing frame body of the drive mechanism. A recording disk drive device which is provided with a bent portion which is in contact with and is in contact with the inner side surface of the projecting peripheral portion at the end of this flat portion.