JPH0535518B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to an information recording and reproducing apparatus that records information on a disk-shaped recording medium (hereinafter referred to as a disk) and that reproduces the recorded information. [Conventional technology] With the development of optoelectronics today,
2. Description of the Related Art Information recording and reproducing devices that can randomly record, reproduce, or erase audio or image information with high performance using a light beam such as a laser beam have been commercialized. For example, in an optical video disk device, a pit pattern on the surface of a disk-shaped recording medium made of transparent acrylic resin or the like is detected in digital quantities by an optical head, photoelectrically converted, and then the gain is adjusted appropriately by an amplifier. The signal is then converted into a predetermined analog value via a reproduction circuit such as a DA converter, and then output to an output device such as a speaker or CRT. In this way, the desired sound or color image can be obtained instantaneously and with high performance. [Problems to be Solved by the Invention] Although the information recording/reproducing device exemplified above has high performance and high quality, its maintenance has been delayed. That is, in order to maintain high performance and high quality, it is necessary to eliminate the adhesion of fine dirt, dust, etc. that cause noise and erroneous symbols, which will be described later, to the surface of the disk, which is a recording medium. However, in the conventional apparatus, no particular means has been provided for removing dirt, dust, etc. that adversely affect the recording, reproducing, or erasing of information. Conventionally, in an apparatus 10a as shown in FIG. 7, the disk 1 has been attached/detached and stored bare. Therefore, dust and static electricity are generated during storage and operation, which adversely affects recording, playback, and erasing. Furthermore, in the device 10b as shown in FIG.
It was thought that dust could be prevented during storage and operation by using two cartridges containing one disk. However, the static electricity generated during operation (while the disk is rotating) attracts dust, which also has an adverse effect on recording, reproducing, and erasing information, as explained in FIG. 9. FIG. 9 is a diagram for explaining erroneous information processing. The projections (pits) on the disk surface correspond to those in the diagonal direction in the figure as "1" and those in the vertical direction as "0", and a digital signal string is formed in units of pits. Then, the audio information is reproduced according to the illustrated pit pattern. usually,
If the disk surface is free from dirt and dust and is properly recycled (step S1),
The audio information will be correctly reproduced with the same pit pattern as the recorded digital signal sequence. On the other hand, if dirt, dust, etc. adhere to or accumulate on the disk surface and proper recycling processing is not performed (step S2), sometimes [1]

[0]
The pit is detected incorrectly, and as shown in the figure, audio information is reproduced as incorrect information. As described above, with conventional devices, sufficient consideration has not been taken in terms of maintenance to prevent dust on the disk surface during information processing, and there are serious drawbacks such as the above-mentioned erroneous information or image distortion caused by noise. Ta. Therefore, there has been a rapid demand for the development of an information recording/reproducing apparatus that eliminates the above-mentioned drawbacks. [Means for Solving the Problems] The present invention has been made against the background of the above-mentioned circumstances, and includes a device outer frame and a disk-shaped recording medium provided inside the device and mounted thereon. a spindle motor for rotating the medium; a head disposed below the medium for recording, reproducing, or erasing information on the medium; and a head disposed below the spindle motor on the bottom surface of the outer frame of the apparatus. A suction mechanism comprising an air intake port, a filter attached to the air intake port, a delivery port provided on a side surface of the outer frame of the device, and a blade and a drive source for driving the blade, the suction mechanism The air taken in from the air intake port through the filter is sent out from the delivery port through the side surface of the spindle motor and the lower surface of the medium, thereby removing dust within the device and cooling the spindle motor. This is how it was done. [Embodiments] Hereinafter, specific embodiments of the information recording and reproducing apparatus of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a schematic structure of an embodiment of the present invention. The information recording and reproducing device 10, which processes information on a disc-shaped disk at high speed, includes an optical head that detects information and converts it into an electrical signal, a memory, conversion, and reproducing circuit made into a small module such as an IC, and various servos. - A servo circuit that controls the actuator is built-in, and the structure is such that information on the disk surface can be randomly recorded, reproduced, or erased. Then, the desired disk 1 or the cartridge containing the disk 1 is inserted into the information recording and reproducing apparatus 1 from the outside.
An attachment/detachment port 11 is provided for installation at a predetermined information detection position 111 of 0. Furthermore, in order to prevent dust on the first surface of the disk, four suction mechanisms 3a are installed at predetermined positions on the bottom surface of the disk, which is the detection surface, so that the appropriate amount of fresh air can be sucked in the appropriate direction.
~3d are provided at appropriate positions. This suction mechanism is composed of drive sources such as blades and a motor, and has a structure that allows one or more of them to be easily removed or installed as needed. And fresh air S
5 is taken in from the external intake port 15e, the lower surface of the disk is properly air-washed by the suction mechanisms 3a to 3d of the present invention, thoroughly cleaned, and all fine dust, dirt, etc. are removed. . In addition, all of the air S1 to S4 containing this dust, dirt, etc. are sent to the external outlet ports 15a to 15 as shown
5d (there are four in the figure, but they can be easily reduced or increased) to the outside of the device, so that even one piece of dust, dirt, etc. that has a negative impact on information processing does not remain on the disk surface or inside the device. It's structured. The external intake port 15e is arranged on the lower surface of the outer frame of the device 10, and allows fresh air to be taken into the device. FIG. 2 is a sectional view for explaining the general structure and function of the information recording/reproducing apparatus of the present invention. When fresh air S5 is taken in through the filter 16 from the external intake port 15e of the information recording and reproducing device 10, as shown in the figure, a drive motor 41 that ensures smooth high-speed rotation of the disk 1 and a light beam such as a laser beam are activated. Negative pressure is created by air suction mechanisms 3b and 3d above the optical head 5, which is equipped with an optical device that irradiates or reflects light and converts it into photoelectric materials, and the disk 1, which is loaded with desired information. is generated, and fresh air S6 and S7 are sucked and supplied. Some of the fresh air S6 and S7 is fed to the drive motor 41 and moves along the outer surface of the drive motor 41 as shown in the figure, so that the drive motor 41 is properly cooled. ing.
Also, as shown in the figure, most of the fresh air S6 and S7 is blown directly to the lower surface C of the disk in an appropriate amount at an appropriate speed, and becomes air S9 along the lower surface C, removing all the attached dust, dirt, etc.
It will be thoroughly cleaned. Then, the air S1 and S3 containing dust, dirt, etc. are sent out to the outside through the external delivery ports 15b and 15d, which are blinded as shown in the figure so that the air does not flow back from the outside. Not even a single piece of dirt or dirt remains that would have a negative impact on information processing. Furthermore, in addition to the above-mentioned dust-proofing effect, the present invention also has a cooling effect function of appropriately cooling a beam such as a laser beam. Normally, information is recorded, reproduced, or erased by changing the projection (pit) pattern using the thermal energy of a light beam b such as a laser beam emitted from the optical head 5. In this case, it is necessary to appropriately cool the laser beam to prevent unnecessary temperature rise of the beam b of the laser beam or to detect this pit pattern during reproduction. In the present invention, this cooling effect is simultaneously achieved by a suction mechanism that sucks air. Optical head 5 as shown
A light beam b such as a laser beam emitted from the disk 1 detects the detection point a of the disk 1 and is reflected. At this time, the air suction mechanisms 3a to 3
Since the air S9 that is successively drawn in at points d properly intersects the light beam b, unnecessary heat of the light beam b is cooled and radiated. FIG. 3 is a sectional view showing the detailed structure of the disk clamping mechanism and suction mechanism of the present invention. This figure shows a state in which the disk 1 is fed into the information recording/reproducing apparatus of the present invention through the mounting port and is accurately set at the information detection position by the feeding mechanism shown in FIGS. 4 to 6. The center of the disc-shaped disk 1 is the center E of the rotation shaft 47 of the drive motor 41 such as a spindle motor.
The structure is such that it is set accurately at E' and no rotational deviation occurs. The disk 1 placed on the disk mounting table 40 is brought into close contact with the positioning member 43 so as not to shift in the left and right directions U to U'.
In addition, the disk 1 is held in close contact with the clamp member 44 and the turntable 42 at points X and Y in the figure in order to cope with vibrations in the vertical direction V to V', and furthermore, at the point Z in the figure, the clamp member 44 and the turntable 42 are used. Parts of the centering member 49 have a concave and convex structure and are closely engaged with each other to prevent deviation from the axial centers E to E', and the rotational motion is smoothly transmitted to the clamp member 44. In this case, the disk 1 rotates at high speed around the rotation axes E to E', and the bearing 48 acts as a shock absorber to the clamp 4.
4, the rotational motion is cut off and is not transmitted to the mechanism above the mounting plate 45. Further, the positioning member 43 is normally held in a lifted state by a spring 46, and when it is installed, the spring 46 contracts so that variations in the disk inner diameter and various parts can be absorbed. And ventilation holes 12a and 1
2b are machined into a square shape, and are provided in an appropriate number and at appropriate locations on the drive motor mounting plate 13 so that appropriate air can be sent to the disk surface via these. Although there are two locations in the figure, they can be easily reduced by closing a lid or increased by opening a hole as needed. Furthermore, an air ventilation plate 20 for internal ventilation is attached, so that a predetermined distance d is created between the disk 1 and the air ventilation plate 20 by the above-mentioned clamp mechanism when recording, reproducing or erasing information. The air 9 flows through this 〓d in the direction shown in the figure without any obstruction, and is structured to remove all dust, dirt, etc. from the disk surface. In such a configuration, as shown in FIG. 2, the air suction mechanism 3
Fresh air is sucked and supplied by a to 3b, and some of the air S7 is supplied to the drive motor 41.
, and some of the other air S6 flows through the hole 1
2a and 12b, it once hits the disk 1, changes direction and is accelerated by the narrow width d, becoming air S9 and blowing the information detection side of the disk 1 with dust and dirt.
All deposits such as dirt are blown out to the outside of the device. In this case, the air S9 is designed to appropriately cool a light beam such as a laser beam, as shown in FIG. 2 described above. FIG. 4 is a perspective view showing the detailed structure and mounting function of the disk mounting table feeding mechanism of the information recording and reproducing apparatus of the present invention. Motor 61 is gear (pinion) 6
The gear 62 and the rack 63 fixed to the guide member 57 mesh with each other. Further, the guide member 57 has a guide elongated hole 5 that can determine the linear sliding amount in each of the mounting direction U and the dismounting direction U' according to the length of the hole.
8, and a fixing pin 59 that fixes the disk mounting base 40 by a predetermined sliding amount, and further the disk mounting base 4
0 by a predetermined sliding amount in the vertical V to V' directions. The disk mounting table 40 has a lightweight and rigid structure, and has an S-shaped elongated hole 6 in the horizontal plate with steps as shown in the figure to ensure stable vertical sliding in the V to V' directions.
8 (there are four holes, although they are omitted in the figure). The disk mounting table 40 and the guide member 57 are configured to slide together in the U-U' direction. Further, a slide member 64 is provided so that the disk mounting table 40 is accurately fixed at a predetermined optical information detection position of the information recording and reproducing device when processed in the V' direction, and when fixing, portions a1 and a2 in the figure are They are designed to be closely engaged with each other. In the above components, the same number of each element (for example, 4 in the case of the fixing pin 66) are provided at symmetrical positions in the sliding direction U to U', and each element is integrated to smoothly move the disk mounting base. It's starting to work. The mounting function of these configurations will be explained. The adhesion direction is the U direction, and a desired disk is currently placed on the disk mounting table 40 and is about to be supplied to a predetermined information detection position of the information recording/reproducing apparatus. In this state, the W of the motor 61
With the rotation in one direction, the gear 62 and the rack 63 rotate and move, and the guide member 57 is linearly guided by the fixing pin 59 in the mounting direction U and slid to a predetermined position. In this case, the fifth
The disk mounting base 4 is attached to the shaft-locked mounting pin 69 shown in the figure.
0 is inhibited, and the disk mounting table 40 is stopped. On the other hand, the slide member 5
7 is slid to the position of the fixing pin 59 by the rotation of the motor 61, and along with this, the disk mounting table 40 is moved downward along the S-shaped elongated hole 68.
It is smoothly moved to V', and as shown in FIG. 5, the end surface a1 of the slide member 64 is brought into close contact with the end surface a2 of the slide member 64, which has been fixed in place in advance, and the mounting operation is completed. 5 and 6 are a perspective view and a front view for explaining the attachment/detachment function of the disk mounting table feeding mechanism of the information recording/reproducing apparatus of the present invention. The direction of attachment and detachment is
Currently, a disk whose information has been detected is placed in the disk groove of the disk mounting table 40 and is about to be returned to the outside of the information recording/reproducing apparatus for the next information detection. There is. In this state, as shown in FIG. 6, the disk mounting table 40, which had been fixed in a predetermined position by the end surface a2 of the slide member 64 and the mounting pin 69 shown in FIG.
As the motor 61 rotates in the W2 direction in FIG. 5, the gear 62 and the rack 63 are rotated and moved, and the guide member 57 is guided by the fixing pin 59 and slid by a predetermined amount linearly in the attachment/detachment direction U'. Ru.
Accordingly, the fixing pin 6 is moved in the T direction shown in FIG.
6 is moved along the S-shaped slot 68. on the other hand,
Since the disk mounting table 40 is prevented from moving in the attachment/detachment direction U' by the slide member 64,
The fixed pin 66 is smoothly moved in the upward direction V along the end surface a2 by the moving height H, and the slide member 64
It becomes possible to slide freely in the U' direction only when it separates from the point. Thereafter, the disk mounting table 40 and the guide member 57 are integrated. Then, as the motor 62 rotates, it is accurately guided by the fixing pin 59 and slides linearly in the attachment/detachment direction U' along the elongated guide hole 58, thereby completing the attachment/detachment operation. In this embodiment, a disk method using a disk is exemplified, but it can also be easily applied to a cartridge method using a cartridge equipped with a disk. [Effects of the Invention] As described above, according to the information recording and reproducing apparatus of the present invention, the air intake port with the filter attached is provided at a position below the spindle motor, and the suction mechanism is driven to draw the air through the filter. It has a simple and inexpensive structure in which the air taken in from the spindle motor is sent out from the outlet through the side of the spindle motor and the bottom surface of the medium, and it has a dust-proofing effect on the disk surface, which was difficult to achieve in the past, and also eliminates light such as laser light emitted from the optical head. It also has a beam cooling effect and has many advantages, such as allowing accurate recording, reproduction, or erasing of information.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a schematic structure of an embodiment of the present invention. FIG. 2 is a sectional view for explaining the general structure and functions of the information recording/reproducing apparatus of the present invention. FIG. 3 is a sectional view showing the detailed structure of the disk clamping mechanism and suction mechanism of the present invention.
4 to 6 are a perspective view and a side view showing the detailed structure and attachment/detachment function of the disk mounting table feeding mechanism of the information recording/reproducing apparatus of the present invention. Figures 7 and 8
The figure is a perspective view of a conventional information recording/reproducing device. FIG. 9 is a diagram for explaining erroneous information processing. 1: disk, 2: cartridge, 3: suction mechanism, 5: optical head, 10: information recording and reproducing device,
11: Mounting/detaching port, 12: Hole, 13: Drive motor mounting plate, 15: External intake or external outlet, 1
6: Filter, 20: Air ventilation plate, 40: Disk mounting base, 41: Drive motor, 42: Turntable, 43: Positioning member, 44: Clamp member, 45: Mounting plate, 46: Spring, 47: Rotating shaft, 48: Bearing, 49: Centering member, 5
7: Guide member, 58: Guide elongated hole, 59: Fixed pin, 61: Motor, 62: Gear, 63: Rack, 64: Slide member, 66: Fixed pin, 6
8: Long hole, 69: Mounting pin.

Claims (1)

[Claims] 1. A device outer frame, a spindle motor provided inside the device to rotate a disk-shaped recording medium mounted thereon, and a spindle motor placed below the medium for recording, reproducing, or erasing information on the medium. an air intake port provided at a position below the spindle motor on the lower surface of the device outer frame, a filter attached to the air intake port, and a feeder provided on the side surface of the device outer frame. a suction mechanism consisting of an outlet, a blade and a drive source for driving the blade, and the suction mechanism is driven to pass the air taken in from the air intake port through the filter through the side surface of the spindle motor and the lower surface of the medium. An information recording/reproducing device in which dust is removed from the device and the spindle motor is cooled by sending out from the sending port.