JPH01296476A - Optical information recording and reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to information recording or reproducing devices, and particularly in the field of handling a large amount of information, an optical system suitable for recording and reproducing information using a device such as an optical disk. The present invention relates to an information recording/reproducing device.

[Conventional technology]

Conventional devices, as described in JP-A-58-100276, are mainly configured with actuators for accessing a large number of disks, and the disk rotation side only allows disk replacement. It is said that

[Problem to be solved by the invention]

2. The conventional technology did not give consideration to the miniaturization of the device or how the customer would use it, and there was a problem in setting up the system in accordance with the customer's requirements.

An object of the present invention is to reduce the size of the device and at the same time provide a device with a large degree of freedom in which a system can be constructed in accordance with the user's requirements.

[Means to solve the problem]

Disc 9 for the motor for rotating the disc for the above purpose.
We made it more compact by making it the minimum specification that allows only one disc to rotate, and added a mechanism to convert the driven disc.
This can be achieved by rotating only the disks that are accessed at any time.

[Effect]

Since the disk rotation motor is designed to rotate only one disk, it can be made smaller than a motor that rotates all stacked disks. The disk is fixed by upper and lower flanges, and is normally fixed to the upper flange, which is free from the motor shaft, and rotated by pressing against the lower flange when rotating. By switching which disk to rotate using a selection signal, it is possible to create a system in which one disk is always rotated.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. 1, using an example of a stacked structure of three sheets.

Disks 1-a, 1-b, 1-c are held by upper flanges 2-a, 2-b, 2-c, respectively. The disks 1-a, 1-b, 1-c are rotated by the shaft 5 of the motor 4 by being sandwiched between the lower flanges 3-a, 3-b, 3-c. Motor 4 to shirt 1 5 is movable in the axial direction,
When moving, the structure is such that it can be moved by a rotating mechanism 9 attached to a moving motor 10. disc 1
-a, 1-b.

Information on 1-c is stored on rails 8-a, 8-b, and 8-dedicated for disks 1-a, 1-b, and 1-c, respectively.
Optical heads 7-a, 7-b, 7 that move cl.
Information can be written and read using c. Also, each disk], a,, 1 b, 1
-c has disk 1 fl, -1-b+ 1-
A holder 6 is provided to hold the flanges;)-a, 3-b, and 3-c.

The shaft 5 of the motor 4 has a spline-like shape, for example, and the upper flange 2 with which the lower flange 3 engages and rotates is not designed to engage with the shaft 5.
be free to rotate.

A disk 1 is held on this upper flange 2, and is kept floating relative to the lower flange 3 by electromagnetism or external mechanical holding. In the diagram, 2-
a and 2-b are in a floating state, and 2-c is attached to the lower flange 3-c in order to rotate the disk 1-c.
It is pressed against an electromagnet or an external mechanical holder. Motor 10 for shaft movement
The rotating mechanism 9 attached to the shaft 5 is separated from the shaft 5 when the shaft 5 is rotating, and is joined when the shaft 5 is moved. The shaft 5 is moved in the axial direction by the rotation of the shaft moving motor 10, and is completely separated from the disk. In this state, disks 1-a, 1-b, 1
-c can be extracted horizontally,
Discs can be replaced. At that time, the upper flange 2-a,
2-b, 2-C and lower flanges 3-a, 3-b, 3
-c is held by the holder 6.

According to this embodiment, it is possible to easily replace any disk, and the motor for driving the disk can also be made smaller.

Another embodiment for transmitting the driving force of the motor for rotating the disk to the disk will be described with reference to FIG.

The motor shaft 5 has a circular cross section, and blocks ]-1-a, 11-b, and 11-C are arranged at three locations around it. The block 11 and the flange 3 are coupled by, for example, piezo elements 12-a, 12-b, and 1.2-C. The block 1]- and the shaft 5 are in a non-contact or sliding state when no voltage is applied to the piezo cords 12-a, 12-b, 1.2-c, and the coefficient of friction increases by applying voltage. and shaft 5
The driving force is transmitted to the flange 3.

These piezo elements 12-a, 12-b, 12
- The power supply to c shall be provided by a slip ring, etc.

According to this embodiment, the shape of the motor shaft 5 can be simplified, and at the same time, the driving force can be smoothly transmitted to the disk.

FIG. 3 shows an example when considering the image of the device.

Disk 1 is stored in cartridge ] 4,
It is inserted into the device 13 as is. At that time, the shutter 15 of the cartridge 14 is opened and information can be written or read. Further, an optical head 16 for optically recording and reproducing information is also integrated into a unit 1 and in the form of a cassette 1-17. Information is recorded and reproduced by inserting the cassette] 7 into the device 13 according to the number of disk cartridges 14. In this embodiment, three sets of cartridges 14 and cassettes 17 are installed in the device 13. Furthermore, up to two sets can be optionally added to the device 13 according to the user's selection.

According to this embodiment, since the disks can be rearranged and the capacity expanded or reduced as desired according to the user's needs, it is possible to construct an optimal system.

〔Effect of the invention〕

According to the present invention, there is a feature that disks can be easily replaced despite having a stacked structure.
Regardless of the number of disks, the motor for rotating the disks only needs to be designed to drive one disk, so there is no need to change the design depending on the model, and there is an effect that miniaturization can be realized.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a disk rotation mechanism according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing an example of a coupling means between a motor shaft and a flange portion of the present invention, and FIG. 3 is a side view showing a disk rotation mechanism according to an embodiment of the present invention. FIG. 2 is a perspective view of the external appearance of the device according to the embodiment. DESCRIPTION OF SYMBOLS 1... Optical disk, 2... Upper flange, 3... Lower flange, 4... Disk rotation motor, 5... Motor shaft, 6... Holder, 7... Optical head, 8...
...Rail, 9...Rotation mechanism, 10...Motor for shaft movement, 11...Block, 12...Piezo cord, 13...Device main body, 14...Disk cartridge, 15... Shutter, 16... Optical head, 17.
··cassette.

Claims (1)

[Claims] 1. In a device consisting of an optical head for writing and reading information, a plurality of recording discs, a motor for rotating the discs, a signal processing circuit, etc., loading any disc. and an optical information recording/reproducing device characterized in that the shaft of the motor for rotating the disk is moved or separated in the axial direction so that the disk can be easily attached and detached. 2. Claim 1, characterized in that the motor for rotating the disk is equipped with a mechanism that rotates only one disk selected from a plurality of disks during access.
The optical information recording and reproducing device described in 2. 3. Optical information according to claim 1, characterized in that the motor for rotating the disk is miniaturized to the extent that it can stably rotate one disk regardless of the number of disks. Recording and playback device. 4. The optical head according to claim 1, wherein the optical head for writing and reading information has a unitized structure and is installed by the user of the device in a number corresponding to the number of disks. Information recording and reproducing device. 5. The optical information recording and reproducing device according to claim 1, wherein the disk on which information is recorded is housed in a cartridge, and is inserted into the device in that state to form a stack structure.