JP2003263820A - Disk loading device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce incompatibly resulting from a difference in loading speed depending upon the kind of a medium and whether a medium is present, individual differences of a disk loading device, variation in loading time due to secular changes and noise in driving. <P>SOLUTION: The disk loading device is equipped with a motor which carries a disk in and out of the device, a control means which controls the motor 61 according to a specified driving profile, a completion detection SW which detects the completion of the carrying-in/out operations by the motor, an arithmetic means which measures the carrying-in/out time of the disk by the motor 61 according to the detection result of the detection SW, and a holding means which holds the disk rotatably at a recording/reproduction position, the control means changing the driving profile according to the measured time of the arithmetic means. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc loading device for a disc device such as a player or a recorder for recording, reproducing or recording / reproducing on / from a disc such as an optical disc.

In particular, the present invention relates to a disc loading device for placing a disc contained in a cartridge or a single disc on a tray and carrying it in (loading) into the disc device or ejecting it to the outside.

[0003]

2. Description of the Related Art At present, read-only disks such as CD-ROMs and rewritable disks of magneto-optical type or phase change type are used as recording media for information equipment such as computers.

The conventional optical disk recording / reproducing apparatus shown in FIGS. 13 to 15 will be used to explain the mounting of the cartridge on the tray, the cartridge holding mechanism, and the loading and ejecting operations of the tray.

13 to 15, 1 is a cartridge in which the optical disc 10 is housed, 144 is an eject switch, 201 is a main body composed of a mechanical chassis 201a and a base frame 201b of the optical disc recording / reproducing apparatus, and 204 is a cartridge and a single unit. Optical disc 10
Is a tray for mounting. (Tray structure) Tray 204
In the center of the cartridge mounting surface 233, two large and small concave portions are provided concentrically. The large-diameter recess is prepared so that the large-diameter disc mounting portion 231 and the small-diameter recess are used in the small-diameter disc mounting portion 232 according to the outer diameter of the disc mounted on the optical disc recording / reproducing apparatus 201.

The tray 204 has a front wall surface 234, a left wall surface 235 and a right wall surface 236 which are slightly larger than the outer size of the cartridge 1 and are formed perpendicularly to the cartridge mounting surface 233. A cartridge preloading member 237 is provided on the back side of the tray 204 so as to be movable in the front-rear direction, and is held by the holding unit 250 in a state of being preloaded on the front side of the tray 204 by a spring 237a. (Rack Gear Structure) A rack gear 288 that engages with the drive gear 219 at the final stage of the loading gear system 281 is provided on the back surface of the tray 204.

The tray 204 has a structure capable of loading and ejecting by switching the rotation direction of a loading motor 280 provided on the front side of the mechanical chassis 201a. (Traverse Base Structure) Spindle motor 282 for holding and rotating the disk 10, optical pickup 283 for reading information from the disk 10 or writing information on the disk 10, and traverse motor 284 for moving the optical pickup 283 in the radial direction of the disk 10. The traverse base 266 holding the lead screw 297 is held by the mechanical chassis 201a. (Traverse base holding structure) The rear end of the traverse base 266 is attached to the mechanical chassis 201a by a torsion spring 266a.
It is rotatably held by and its front end is preloaded downward with a light load.

Two slit holes 291 are provided on the left and right of the front end 266b of the traverse base 266.
Rotating shaft 292 provided on the bottom surface of the mechanical chassis 201a
Is engaged with a cam lever 285 that is inserted about the rotation center. The traverse base 266 is driven up and down by the rotation of the cam lever 285. (Alignment pin structure) Traverse base 266 has
In addition to the spindle motor 282, the optical pickup 283, and the traverse motor 284, two alignment pins 214 that engage with the positioning holes 3 of the cartridge 1 are provided, and the disc 10 held by the spindle motor 282 and the cartridge 1 are provided. The clearance is maintained and the cartridge 1 is positioned so as not to contact the disk 10. (Cartridge status detection switch structure) A disk status detection switch 215 is provided near the alignment pin 214. By determining the engagement state with the detection hole (not shown) of the cartridge 1, the write enable / disable state of the disc 10 housed in the cartridge 1, the front and back of the disc 10, and the recording capacity of the disc 10 are detected. A plurality of detection switches 215 mounted on the board are provided integrally with the traverse base 266. (Upper Base Structure) An upper base 228 is provided as an upper lid on the mechanical chassis 201a. The disk 10 is attached to the upper base 228 by the spindle motor 28.
2, a clamp arm 212 for holding the clamper 210 vertically with respect to the spindle motor 282, and a cartridge pressing spring 229 for restricting vibration of the cartridge 1 during loading.
A cartridge pressing roller is optionally provided on the cartridge pressing portion 230. The cartridge 1 is fixed to the tray 204 by the downward pressing force of the cartridge pressing spring 229 via the cartridge pressing portion 230. (Cartridge Holding Spring Structure) The urging force of the cartridge holding spring 229 urges the cartridge 1 to the tray 204 and the tray 204 to the mechanical chassis 209 from immediately after the start of loading to after the loading is completed, so that the cartridge 1, the tray 204, and the mechanical chassis are urged. It has a function of eliminating play generated between the portions 201a and reducing vibration and noise generated at the time of loading and rotation of the disk 10. (Shutter opener structure) Also, upper base 228
Is provided with a shutter opener (not shown) for opening and closing the shutter 2 of the cartridge 1. The projection of the tip of the shutter 2 is hooked with the shutter opener and opened to the right according to the loading operation of the cartridge 1. Do loading.

Disk 10 housed in cartridge 1
When the shutter 2 is released, the spindle motor 282 can rotate and the optical pickup 283 can record and reproduce. (Clamper structure) Spindle disk 282 for disk 10
When it is mounted on the disk 10, the clamper 210 fixes the disk 10 to a turntable (not shown) on the spindle motor 282.

The clamper 210 is composed of a member that can be divided into upper and lower parts, and has a magnet (not shown) built therein. Further, since the disk 10 is centered with respect to the turntable, a magnetic material (not shown) is embedded at the top of the center cone formed in the center.
The clamper 210 fixes the disk 10 to the turntable by the magnetic attraction force of the magnet and the magnetic substance built in the clamper 210. (Traverse Drive Structure) The optical pickup 283 is movably held in the radial direction of the disc 10 by two metal shafts named a main shaft and a sub shaft provided on the traverse base 266.

A traverse motor 284 is provided near the spindle.
Is provided with a lead screw 297 directly connected to. The optical pickup 283 has a lead screw 297.
When the traverse motor 284 rotates, a driving force in the radial direction of the disc 10 is generated in the optical pickup 283 via the nut piece engaged with the lead screw 297, and the target of the disc 10 is engaged. High-speed movement to the radial position is possible. (Optical pickup structure) A semiconductor laser, a lens, a light receiving element (not shown), and the like are integrated in the optical pickup 283 with high density. An objective lens is supported by an opening on the upper surface of the optical pickup 283 by a wire spring (not shown) so as to be vertically movable and back and forth.

In order to record / reproduce data recorded on the back surface of the disk 10, a laser beam is focused on the back surface of the disk 10 to form a minute spot.

In order to keep the focus of the laser light on the radial vibration of the disk 10 and the surface wobbling in the rotation axis direction, the objective lens is provided with an electromagnetic actuator (not shown) which generates a driving force in the radial direction and the rotation axis direction. Has been. (Rubber Damper Support) The tray 204, the mechanical chassis 201a, the traverse base 266, the upper base 228 and the mechanical portion of the main body 201 of the optical disc recording / reproducing apparatus held or fixed to these trays are provided as one It constitutes a rigid body state.

In the mechanical portion of the main body 201 of the optical disc recording / reproducing apparatus having the above-mentioned structure, four corners are supported by the rubber damper 290 with respect to the base frame 201b. The elastic support by the rubber damper 290 has an effect of reducing the influence on the recording / reproducing operation of the disk 10 when the base frame 201b is subjected to external vibration or shock.

The operation of the optical disk recording / reproducing apparatus having the above-described structure will be described by taking the case of reproducing the disk 10 housed in the cartridge 1 as an example. (Cartridge mounting) The cartridge 1 is mounted on the tray 204 surrounded by the front wall surface 234, the left wall surface 235, and the right wall surface 236.
When loading the cartridge 1, the cartridge preloading member 237 is pushed inward with respect to the tray 204 at the rear end of the cartridge 1 while sliding the cartridge 1 diagonally downward from the upper front side of the tray 204, and finally the cartridge 1 The cartridge 1 is mounted on the cartridge mounting surface 233 so that the front end contacts the inner wall of the front wall surface 234, and the mounting of the cartridge 1 on the tray 204 is completed.

At this time, the front end of the cartridge 1 is pressed against the inside of the front wall surface 234 by the cartridge preloading member 237, and the cartridge 1 is moved to the tray 204.
Positioned without back and forth, left and right. (Loading) Tray 2 on which cartridge 1 is placed
Reference numeral 04 denotes a driving force of the loading motor 280, which is automatically loaded into the optical disc recording / reproducing apparatus.

The tray 204 and the mechanical chassis 201a are resin molded products, and the sliding surface of the mechanical chassis 201a at the time of loading is smooth. The sliding surface of the lower surface of the tray 204 has a rail shape having a convex cross section, and several guide members are provided in the vicinity of the sliding surface of the mechanical chassis 209 to prevent meandering at the time of loading the tray 204. It has a structure.

When the tray 204 is loaded, the cartridge holding springs 229 provided on the left and right of the upper base 228 and the four cartridge holding portions 230 provided at the front and rear ends of the cartridge holding spring 229 are
The ribs at the left and right ends of the cartridge 1 are urged downward. The tray 204 is attached to the mechanical chassis 2 via the cartridge 1 urged downward by the cartridge pressing portion 230.
The loading operation is performed by being urged by 09, without generating vibration and noise due to looseness in the vertical direction.

Until the tray 204 is completely loaded, the spindle motor 282, the traverse motor 284, and the optical pickup 283 held on the traverse base 266 avoid interference with the tray 204, the cartridge 1, and the disk 10, so that the tray 204 is prevented. It is evacuating below the loading route of. (Clamper lowering) Immediately before the loading of the tray 204 is completed, the clamp arm driving protrusion 241 provided on the tray 204 pushes up one of the clamp arms 212 rotatably provided on the upper base 228 by a hinge. The other one of the clampers 210 held is lowered. As a result, the clamper 210 is lowered to a position where the disc 10 can be clamped. (Raising the traverse base) After the clamper 210 is lowered, when the loading of the cartridge 1 placed on the tray 204 is completed, the tray 204 and the rack gear 288 are moved.
Is disengaged, the driving force by the drive gear 219 is separated from the tray 204, and only the rack gear 288 is driven rearward with respect to the tray 204. Rack gear 11
The rearward driving force of the cam lever 7 is transmitted to the cam lever 285 as a rotational force of the cam lever 285, whereby the traverse base 266 engaged with the cam lever 285 at the slit hole 291 rises along the slope of the cam lever 285. (Alignment Pin Insertion) As the traverse base 266 rises, the two alignment pins 214 integrally provided with the traverse base 266 are inserted into the two positioning holes 3 provided on the front side of the cartridge 1.

At the time of loading, the cartridge 1 is displaced with respect to the spindle motor 282 due to the play of the tray 204 with respect to the mechanical chassis 201a and the play of the cartridge 1 with respect to the tray 204. When the disc 10 is rotated with the cartridge 1 displaced from the spindle motor 282, the outer peripheral portion of the disc 10 and the inner wall of the cartridge 1 come into contact with each other to generate noise. If the positional deviation is large, the contact becomes a resistance, the clamped state of the disc 10 is released, and the disc 10 may be damaged inside the cartridge 1.

By inserting the alignment pin 214 into the positioning hole 3 of the cartridge 1, the cartridge 1
The misalignment of the disk with respect to the spindle motor 205 is improved, and a sufficient clearance is secured between the cartridge 1 and the disk 10. (Detection switch insertion) Before and after the alignment pin 214 is inserted into the cartridge positioning hole 3, the state detection switch 215 also has a state detection hole (not shown) in the cartridge 1.
Inserted in.

Unlike the alignment pin 214, since a large clearance is secured between the state detection hole and the state detection switch 215, even if the cartridge 1 is misaligned, it is possible to detect the state of the cartridge 1. , The insertion operation is guaranteed with a margin. (Disc clamp) In parallel with the insertion of the alignment pin 214 and the state detection switch 215 into the cartridge 1,
In the process of raising the traverse base 266, the center cone is inserted into the center hole of the disc 10 housed in the cartridge 1, and the disc 10 floats in the space inside the cartridge 1.

As the disk 10 floats, the clamper 210, which was waiting at the clamp position, moves the center cone 22
2 and the clamping of the disc 10 is completed. (Disc rotation) When the clamping of the disc 10 is completed,
The spindle motor 282 rotates and the optical pickup 28
A spot of laser light is emitted from 3 onto the back surface of the disk 10.

Thereafter, the data recorded on the disk 10 is reproduced in accordance with a command from the host PC. (Disc Release) After completion of a predetermined recording / reproducing operation for the disc 1, the cartridge 1 and the disc 10 housed in the cartridge 1 are again in accordance with a command from the PC or an input signal from the eject switch 144 of the main body 201 of the optical disc recording / reproducing apparatus. The eject operation of is started.

The ejecting operation of the tray 204 is almost the reverse of the loading operation, and therefore the description thereof will be omitted.

[0026]

As described above, in the case of the loading device that uses both the cartridge and the bare disk, the cartridge is loaded into the device against the load when opening and closing the shutter of the cartridge and the load of the cartridge. Since a large load is applied, the drive system such as the gear ratio is generally designed mainly for the cartridge.

As a result, a large driving torque is required, and if the gear ratio is selected to be an appropriate speed when carrying in the cartridge, the speed of the carrying-in means such as the tray becomes too fast when there is no medium or a bare disk, It becomes noise during loading.

Further, it is necessary to change the profile of the drive system while judging the state of the loading device due to individual differences of the disc loading device and changes with time, and to reduce noise.

In the disk loading device according to the first aspect, there are problems of discomfort due to a difference in loading speed depending on the type of medium and the presence / absence of a medium, individual differences of the disk loading device, variations in loading time due to aging, and noise during driving. Is the solution.

In the disk loading device according to the second aspect of the present invention, the problems of discomfort due to the difference in loading speed immediately after the medium replacement and noise at the time of driving are solved.
That is, in the case of a loading device that uses both a cartridge corresponding to a plurality of types of media and a bare disc, the user will feel uncomfortable unless the profile of the drive system corresponding to the media is changed immediately after the media is replaced.

In the disk loading device according to the third aspect of the invention, the problems of variations in loading time due to temperature changes of the disk loading device and noise during driving are solved. That is, since the loading time and the ejecting time of the drive system also change depending on the internal temperature of the disk loading device, it is necessary to change the profile of the drive system while determining the internal temperature of the loading mechanism.

The disk loading device according to the fourth aspect of the invention solves the problem of obtaining an optimum drive profile by a simple algorithm. That is, by measuring the time at the time of loading and ejecting, the optimum drive profile is taken into consideration in consideration of variations including the type and size of the loaded medium, individual differences of the disc loading device, changes over time, temperature changes, etc. To ask for
It is necessary to detect the state of the disc loading device with a simple algorithm.

According to the disk loading apparatus of the fifth aspect, the problem of noise during driving generated when the clamp mechanism holds the medium at the time of loading is solved. That is, a loading device that handles a disc generally uses a disc clamping mechanism that utilizes the attraction force between a magnet and a magnetic material as a disc holding means.
Even in this mechanism having a simple structure, since the attraction force between the magnet and the magnetic body is inversely proportional to the square of the distance, a large noise is generated due to an impact when the disc is held by the clamp mechanism or when the clamp mechanism is released.

According to the disk loading apparatus of the sixth aspect, the problem of noise during driving generated when the clamp mechanism releases the medium at the time of ejecting is solved.

The disk loading device according to the seventh, eighth and ninth aspects solves the problem of selecting an algorithm which is fast and has a fast convergence as the arithmetic means. That is, when the learning control of the drive mechanism is performed based on the measurement results of the loading time and the eject time and the drive profile prepared in advance, it is necessary to select a high-speed and fast-converging algorithm as the calculation means.

[0036]

According to a first aspect of the present invention, there is provided a disk loading device for driving a disk into and out of the apparatus, a control means for controlling the driving means according to a predetermined driving profile, and a loading means by the driving means. And detecting means for detecting completion of unloading, computing means for measuring loading and unloading time of the disk by the driving means based on the detection result of the detecting means, and holding means for rotatably holding the disk at the recording / reproducing position. And the control means changes the drive profile according to the measurement time of the calculation means.

As a result, it is possible to reduce discomfort due to a difference in loading speed depending on the type of medium and the presence / absence of a medium, and variations in loading time due to individual differences in the disk loading device and changes with time, and noise during driving.

According to a second aspect of the present invention, there is provided a disk loading device for driving the disk into and out of the apparatus, controlling means for controlling the driving means according to a predetermined driving profile, and detecting completion of loading and unloading by the driving means. Detecting means, a calculating means for measuring the loading and unloading times of the disc by the driving means based on the detection result of the detecting means, a media discriminating means for discriminating the form and size of the disc, and a recording / reproducing position of the disc. The control means changes the drive profile for each medium according to the determination result of the medium determination means, and changes the drive profile according to the measurement time of the calculation means. To do.

As a result, it is possible to wipe off the feeling of strangeness due to the speed difference immediately after the medium is switched by the dual-purpose loading mechanism corresponding to a plurality of types of media and to reduce the noise during driving.

According to a third aspect of the present invention, there is provided a disk loading device for driving the disk into and out of the apparatus, controlling means for controlling the driving means according to a predetermined driving profile, and detecting completion of loading and unloading by the driving means. Detecting means, a calculating means for measuring the loading and unloading times of the disk by the driving means based on the detection result of the detecting means, a measuring means for the internal temperature of the apparatus, and the disk being rotatable at the recording / reproducing position. And a holding means for holding, wherein the control means changes the drive profile for each predetermined temperature according to the measurement result of the internal temperature, and changes the drive profile according to the measurement time of the calculation means. is there.

As a result, it is possible to reduce variations in the loading time and the ejecting time of the drive system of the disk loading device due to temperature changes.

In the disk loading device according to a fourth aspect of the present invention, in the first, second and third aspects, the control means obtains the drive processing number assigned to each inflection point of the drive profile and the arithmetic means. The operation time of the drive means is changed by the calculation processing based on the measurement results of the carry-in and carry-out time.

As a result, it is possible to obtain the time measurement result at the time of loading and ejecting, and the drive profile according to the type and size of the mounted medium, the individual difference of the disc loading device, the change over time, and the temperature change.

According to a fifth aspect of the present invention, in the fourth aspect, the point at which the disc is engaged with the holding means is selected as the inflection point in the drive profile when the disc is carried into the device.

This makes it possible to reduce the noise generated when the clamp mechanism holds the medium during loading.

According to a sixth aspect of the present invention, in the fourth aspect, the inflection point is the point at which the disc is disengaged from the holding means in the drive profile when the disc is carried out from the inside of the device.

This makes it possible to reduce the noise generated when the clamp mechanism releases the medium during ejection.

According to a seventh aspect of the present invention, there is provided a disk loading device according to any one of the first, second, third, fourth, fifth and sixth aspects, wherein the arithmetic means is a variable as a drive time which is a main drive profile. The driving profile is assigned a driving process number at a certain time, and if the driving process number detected by the detecting means to be completed is larger than the optimum number obtained in advance, the operating time of the driving means is lengthened, and the ending process is detected by the detecting means. If the number is smaller than the optimum number obtained in advance, the operating time of the driving means is shortened.

Thus, using this algorithm,
The measurement results of loading time and eject time,
With the drive profile prepared in advance, the learning control of the drive mechanism can be performed at high speed and with fast convergence.

According to a seventh aspect of the present invention, there is provided the disk loading device according to the seventh aspect, wherein the calculating means assigns a value unique to the driving process number other than the optimum number, and the driving process is completed when the driving process ends with the driving process number. A value unique to the number is added to the operating time of the driving means.

Thus, using this algorithm,
The measurement results of loading time and eject time,
With the drive profile prepared in advance, the learning control of the drive mechanism can be performed at high speed and with fast convergence.

According to a ninth aspect of the present invention, in the seventh aspect, the arithmetic means multiplies the difference between the drive processing number and the optimum number by a coefficient and adds the product to the operating time of the drive means.

Thus, using this algorithm,
The measurement results of loading time and eject time,
With the drive profile prepared in advance, the learning control of the drive mechanism can be performed at high speed and with fast convergence.

According to a tenth aspect of the present invention, there is provided a disk loading device for driving a disk into and out of the apparatus, a control means for controlling the driving means according to a predetermined drive profile, and a medium for discriminating the form and size of the disk. It is characterized in that it comprises discriminating means and holding means for holding the disc rotatably at the recording / reproducing position, and the control means changes the drive profile in accordance with the discriminating result of the medium discriminating means.

As a result, the same effect as the second aspect can be obtained.

A disc loading device according to an eleventh aspect of the present invention comprises a drive means for loading and unloading the disc into and from the device, a control means for controlling the drive means in accordance with a predetermined drive profile, and a means for measuring the internal temperature of the device. Holding means for rotatably holding the disk at the recording / reproducing position, and the control means changes the drive profile in accordance with the measurement result of the internal temperature.

As a result, the same effect as the third aspect can be obtained.

[0058]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. The disk loading device of the present invention can be used in horizontal and vertical installation and vertical installation with the opening facing up. In the present embodiment, the following description will be given with the disk loading device installed horizontally.

In the present invention, the diameter is 8 cm or 12 cm.
, A reproduction disc such as a music CD or a DVD-ROM and a recording disc such as a DVD-RAM. These are collectively referred to as a bare disc. The type of medium is taken into consideration by the loading mechanism, and the recording / reproducing system and recording density are not limited to the above examples.

A description will be given below of a loading device that handles both bare discs having different sizes such as 12 cm and 8 cm, and a cartridge storing the bare discs. First, I will explain the overall configuration of the disc loading device,
Subsequently, the configuration of each part will be described in detail.

FIG. 1 shows the mechanical structure of one embodiment of the present invention.
To FIG. 7 and the electrical configuration will be described with reference to FIGS. 8 to 12.

First, the mechanical structure and operation will be described. FIG. 1 shows a first embodiment of an optical disk recording / reproducing apparatus of the present invention. In FIG. 1, 140 is a main body of the optical disk recording / reproducing apparatus, and 20 is a cartridge mounting member for mounting a cartridge and a single optical disk. A tray, 1 is a cartridge, and 10 is a disk housed in the cartridge. (Tray Structure) Two large and small concave portions are provided concentrically in the center of the cartridge mounting surface 21 of the tray 20. The large-diameter recess is prepared so that the large-diameter disc mounting portion 22 and the small-diameter recess are used by the small-diameter disc mounting portion 23 according to the outer diameter of a single disc mounted on the main body 140 of the optical disc recording / reproducing apparatus. .

Further, a left wall surface 25 and a right wall surface 26, which are slightly larger than the outer dimensions of the cartridge 1 and are perpendicular to the cartridge mounting surface 21, are formed on both left and right ends of the tray 20, respectively. It has the function of a guide when it is placed on.

A stopper 28a for restricting the back position of the cartridge 1 is provided on the back side of the tray 20. (Cartridge Holder Structure) Openings 30 are provided in parts of the left wall surface 25 and the right wall surface 26, and a cartridge holder 27 that engages with the recessed engaged portions 6 on the left and right end surfaces of the cartridge 1 is provided. There is.

The cartridge holder 27 is rotatably held around a pin 28 provided on the cartridge mounting surface 21, and a hole 27a provided in the middle fits into the pin 28, one of which is provided on the cartridge 1. It has, for example, a convex engaging portion 27b that engages with the engaged portion 6, and the other has a tray 20.
And the coil spring 49 is urged in the direction to hold the engaged portion 6 of the cartridge 1. Therefore, the left and right sides of the cartridge 1 are regulated and supported by the left and right wall surfaces 25 and 26, and the front and rear sides are regulated and supported by the cartridge holder 27. (Shutter Opener Structure) An opener 29 for opening and closing the shutter 2 of the cartridge 1 is provided on the back side of the tray 20 so as to be movable in the left-right direction. Loading is performed while hooking the shutter opener 24 on the protrusion at the tip of the shutter 2 and opening it to the left. Shutter opener 24
Is guided by, for example, a cam provided on the lower surface of the upper base 83 so that the opener 29 moves as the cartridge 1 is loaded.

Disk 10 housed in cartridge 1
When the shutter 2 is released, the spindle motor 90, which is a disc rotating means, and the optical pickup 99 can perform recording and reproduction. (Rack Gear Structure) A rack gear 40 extending in the loading direction of the tray 20 is provided on one side of the back surface of the tray 20 so as to be engaged with the drive gear 66a of the deceleration loading gear system 66 of the loading motor 61 that is the drive means. There is.

The tray 20 has a structure capable of loading and ejecting by switching the rotation direction of the loading motor 61. In this case, a metal guide shaft 41 is provided near the rack gear 40 on the back surface of the tray.
Are held at the front and rear ends of the tray 20, and are held by the mechanical chassis 60 via the shaft holder 42. The other side of the tray 20 is slidably supported by the guide stepped portion 63 of the mechanical chassis 60, and the tray 20 is prevented from being lifted from the guide stepped portion 63 by the elastic floating prevention portion 209 provided on the side wall of the mechanical chassis 60. is doing. The loading motor 61 and the loading gear system 66 are provided at the front end of the mechanical chassis 60. (Traverse base configuration / rubber damper support) Disc 10
Spindle motor 90 for holding and rotating
An optical pickup 99 for reading 0 information or writing information on the disc 10, a traverse motor 94 for moving the optical pickup 99 in the radial direction of the disc 10, and a traverse base 82 for holding a lead screw 95.
The four corners are elastically held to a traverse holder 70, which is a traverse holding member, by a rubber damper 71, which is formed of a rubber material, which is a damper member. 85 is a stopper for fixing the rubber damper 71, for example, a screw. By being elastically supported by the rubber damper 71, the disk 1 when external vibration or shock is applied to the main body 140 of the optical disk recording / reproducing apparatus.
It has an effect of reducing the influence of 0 on the recording / reproducing operation. (Traverse Holder Support Structure) A rear side of the traverse holder 82 is rotatably supported by a shaft 84 with respect to a bearing 67 of the mechanical chassis 60, and a front side of the traverse holder 82 is engaged with a slide cam 100 described later. For example, a protrusion 183 which is a matching cam follower is provided, the protrusion 183 engages with the inclined cam groove 109 of the slide cam 100, and the traverse holder 82 is driven vertically by the lateral movement of the slide cam 100. Has become. (Alignment Pin / Cartridge Status Detection Switch Structure) Alignment pin 102 that engages with positioning hole 3 through hole 20a of tray 20 after completion of loading of cartridge 1 placed on tray 20, and engagement with cartridge status detection hole 4 When the detection lever 106 is
It is provided near the loading motor 61 on the front side of the mechanical chassis 60.

The alignment pin 102 is the body 102A.
And a cylindrical body 102a having a cam follower such as a protrusion and slidably fitted to a column (not shown) provided upright on the mechanical chassis 60 and movably supported up and down. Similar to the traverse holder 70, the cam follower engages with the cam groove 109 of the slide cam 100 at a position apart from the protrusion 183, and the alignment pin 102 is driven up and down by the lateral movement of the slide cam 100, and detection is performed. The lever 106 is pivotally supported by the mechanical chassis 60 and is rotated by the lateral movement of the slide cam 100.
It is adapted to be driven up and down by 04.

The alignment pin 102 engages with the positioning hole 3 of the cartridge 1 after the loading is completed to maintain the clearance between the disk 10 held by the spindle motor 90 and the cartridge 1, and the cartridge 1 does not come into contact with the disk 10. It has the function of positioning in position.

The detection switch 105 is provided on the circuit board 85 of the control circuit attached to the lower surface of the mechanical chassis 60, and by determining the engagement state with the detection hole 4 of the cartridge 1 via the detection lever 106, the cartridge is detected. 1, the write enable / disable state of the disk 10 housed in the disk 1,
It has a function of detecting the recording capacity of the disk 10, the front and back of 0. (Upper Base Structure) The mechanical chassis 60 is provided with an upper base 83 as an upper lid. The upper base 83 has a clamper 84 for fixing the disk 10 to the spindle motor 90, and the clamper 84 for the spindle motor 9
A clamp groove 73 for holding the shutter 2 of the cartridge 1 in the vertical direction and a cam groove for restricting the movement of the opener 29 for opening and closing the shutter 2 of the cartridge 1 are provided. The clamp arm 73 is provided with a clamper 84 at its tip, an intermediate portion 76 is attached to the upper base 83, and the spring 84 elastically urges the clamper 84 in a direction away from the spindle motor 90, and a rear end has a receiving portion 73a. .
When the loading of the tray 20 is completed, the receiving portion 73 is pushed by the pressing portion provided at the rear end portion of the tray 20, for example, the protrusion 130,
This causes the clamper 84 to approach the spindle motor 90. (Side Arm Structure) Further, on both left and right side surfaces of the mechanical chassis 60, a side arm 143 for restricting vibration of the cartridge 1 after completion of loading and a side arm spring 143a for urging the side arm 143 toward the cartridge 1 are provided. . The middle portion of the side arm 143 is pivotally supported by the shaft 78, the rear end of the side arm 143a is engaged with the lower surface side of the traverse holder 70 by the side arm spring 143a, and the front end is located above the loading cartridge 1. When the traverse holder 70 moves up as the tray 20 is loaded, the side arm spring 143a causes the side arm 143 to move.
Urges the cartridge 1 to the tray 20, the tray 20 to the mechanical chassis 60, and the cartridge 1 and the tray 2
It has a function of eliminating backlash generated between the mechanical chassis 60 and vibration and noise generated when the disk 10 rotates. Further, by fixing the tray 20 to the mechanical chassis 60 by the side arm 143 after the loading of the tray 20 is completed, the load of the loading motor 61 at the time of loading the tray 20 is reduced. (Clamper Structure) When mounting the disk 10 on the spindle motor 90, the clamper 74 turns the turntable 91.
The disk 10 is fixed to the disk.

The clamper 84 is composed of a member that can be divided into upper and lower parts, and has a magnet (not shown) built therein. Further, since the disk 10 is centered with respect to the turntable 91, a magnetic material (not shown) is embedded at the top of the center cone formed in the center. The clamper 84 fixes the disk 10 to the turntable 91 by the magnetic attraction force of the magnet and the magnetic body built in the clamper 84. (Traverse Drive Structure) The optical pickup 99 is movably held in the radial direction of the disc 10 by two metal shafts named a main shaft 97 and a sub shaft 98 provided on the traverse base 80.

In the vicinity of the main shaft 97, the traverse motor 9
A lead screw 95 directly connected to the No. 4 is provided. The optical pickup 99 is provided with a nut piece 96 that engages with the lead screw 95. When the traverse motor 94 rotates, the optical pickup 99 drives the optical pickup 99 in the radial direction via the nut piece 96 that engages with the lead screw 95. A force is generated and the disk 10 can be moved at a high speed to a target radial position. (Slide Cam Structure) A partition wall 178 that partitions the front side of the traverse holder 82 from the loading motor 61 and the like is provided on the mechanical chassis 60, and the slide cam 100 is provided on the partition wall 178 so as to be movable in the left-right direction.

A rack gear 101 is provided on the front side of the slide cam 100, and is driven left and right by an intermediate gear 65 of a loading gear system 66. A cam follower provided at the end of the slide cam 100, for example, the protrusion 100a is guided by a load cam 249 provided on the back surface of the tray 20. The load cam 249 is used in the front-back direction of the tray 20, that is, the rack gear 4.
An extending portion 249a that extends in parallel with 0 and is inclined by about 45 degrees on the front end side of the tray 20 extends, and an extending portion 249b extends vertically in the front-rear direction of the tray 20. Therefore, the drive gear 66a drives the rack 40 by the operation of the loading motor 61 and the loading gear system 66 to load the tray 20, and when the protrusion 100a moves to the inclined portion 249a near the completion of loading, the slide cam 10 is moved.
0 starts moving and the intermediate gear 6 of the loading gear system 66
5 and the rack gear 101 mesh with each other, then the rack 40 and the drive gear 66a are disengaged from each other, and the gears are switched. When the protrusion 100a of the slide cam 100 moves to the extending portion 249b, the loading of the tray 20 is stopped, and only the slide cam 100 is moved by the intermediate gear 65. The eject operation of the tray 20 is the opposite operation.

As the slide cam 100 moves left and right, the traverse holder 82, the alignment pin 102 and the detection lever 106 are driven in the vertical direction as described above.

The operation of the main body 140 of the optical disk recording / reproducing apparatus configured as described above will be described by taking the case of reproducing the disk 10 housed in the cartridge 1 as an example. (Cartridge mounting) When the cartridge 1 is mounted on the tray 20, the cartridge 1 is slid from the front of the tray 20 in the direction of pushing the cartridge mounting surface 21 onto the optical disk recording / reproducing apparatus.

The left and right end surfaces of the cartridge 1 are left wall surfaces 25,
While being pushed into the tray 20 by using the right wall surface 26 as a guide, the engaging portion 27b of the cartridge holder 27 has an inclined surface in the tip shape, so that the cartridge 1 is easily released by the insertion force of the cartridge 1. When the cartridge 1 is further inserted, the engaging portion 27b of the cartridge holder 27
Is engaged with the engaged portion 6 of the cartridge 1 by the biasing force of the coil spring 49.

The operator can recognize that the engagement is completed by the change in the insertion force and the sound generated when the cartridge holder 27 is engaged.

A stopper 28a for restricting the insertion limit of the cartridge 1 is provided on the back side of the cartridge mounting surface 21.
Is provided, and the engagement position between the cartridge 1 and the cartridge holder 47 and the insertion limit of the stopper 28a are substantially the same.

This completes the mounting of the cartridge 1 on the tray 20.

At this time, the cartridge 1 is restricted from moving in the front-rear direction by the cartridge holder 27 and in the left-right direction by the left wall surface 25 and the right wall surface 26. (Manual loading operation) If the insertion force is continuously applied to the cartridge 1 as it is, the insertion force is transmitted to the tray 20 via the stopper 28a, and the tray 20 starts manual loading to the optical disc recording / reproducing apparatus 140. To do.

While the tray 20 is being manually loaded, a tray passage signal is detected by an eject end switch (not shown) of the tray, a drive voltage is applied to the loading motor 61, and the loading motor 61 is loaded.
The rotation of the drive gear 66 driven by the rotation of the tray 2
At 0, the automatic loading operation starts.

At this time, when the force of inserting the cartridge 1 into the cartridge holder 27 and the magnitude of the manual loading force of the tray 20 are compared, the relationship of (cartridge inserting force) <(manual loading force) is established. By setting the spring constant and the preload of the coil spring 49 for urging the cartridge holder 27, the tray 20 is manually loaded after the mounting of the cartridge 1 on the tray 20 is completed.

If the above-mentioned force relationship is reversed, loading of the tray 20 is started before the insertion of the cartridge 1 into the cartridge holder 27 is completed, and a clamping error of the disk 10 accommodated in the cartridge 1 occurs. To do. (Automatic loading operation) When the mounting of the cartridge 1 on the tray 20 is completed, a loading switch (not shown) of the main body 140 of the optical disk recording / reproducing apparatus is turned on.
Thus, a driving voltage is applied to the loading motor 61, and the tray 20 starts an automatic loading operation by the rotation of the driving gear 66 that follows the rotation of the loading motor 61.

During the loading operation of the tray 20, the shutter 2 of the cartridge 1 is operated by the operation of the shutter opener 29.
Is released and the optical disc 1 contained in the cartridge 1
The recording surface of 0 is ready for recording and reproduction. (Drive the traverse holder) Just before the loading operation of the tray 20 is completed, the load cam 24 provided on the back surface of the tray
The slide cam 100 is driven to the left by 9. The traverse holder 70 that engages with the cam groove 109 of the slide cam 100 by the movement of the slide cam 100.
Moves gradually from the lowest position to the highest position.

The traverse base 82 elastically supported by the rubber damper 71 on the traverse holder 70 also moves to the uppermost position where the optical disc after loading is clamped by the clamper 84.

When the movement of the slide cam 100 is completed, the clamping of the optical disk is completed and the spindle motor 90 starts rotating the optical disk. (Unauthorized Placement of Cartridge) Next, the operation of the cartridge holder 27 in the case of the irregular placement in which the front and rear of the cartridge 1 are placed on the tray 20 in the opposite direction will be described with reference to FIG.

As in the case of the normal operation, the cartridge 1 is slid from the front of the tray 20 in the direction to push the cartridge mounting surface 21 onto the optical disk recording / reproducing device 140.

The left and right end surfaces of the cartridge 1 are left wall surfaces 25,
While being pushed into the tray 20 by using the right wall surface 26 as a guide, the tip of the engaging portion 27b of the cartridge holder 27 is easily released by the insertion force of the cartridge 1. When the cartridge 1 is further inserted, the engaging portion 27b of the cartridge holder 27 slides along the left and right end surfaces of the cartridge 1 in the released state because there is no engaged portion 6 of the cartridge 1. Even when the cartridge 1 reaches the position of the stopper 28a for restricting the insertion limit, the cartridge holder 47 remains in the released state.

When the loading switch is turned on while the cartridge 1 is irregularly placed on the tray 20, the tray 20 is loaded into the optical disk recording / reproducing device 140. However, during the loading of the tray 20, the cartridge holder 27 is in the released state and is opened outward from the left and right end surfaces of the tray, so that the opening 60a of the mechanical chassis 60 for passing the tray 20 of the optical disk recording / reproducing apparatus 140 is formed. Cartridge holder 4 from width
Since the released state of 7 is wider in the width direction, the engaging portion 27b of the cartridge holder 27 interferes with the opening 60a, and the loading operation of the tray 20 is stopped halfway.

The loading motor 61 detects a sudden increase in the driving load due to the interference between the cartridge holder 27 and the opening 60a, and stops the loading operation of the tray 20, after which the loading motor 61 rotates in the reverse direction and the tray 2 is rotated.
The eject operation is switched to 0.

As described above, since the operator has ejected the cartridge 1 that should have been loaded and loaded onto the tray 20 unexpectedly, the operator will recognize the irregular loading of the cartridge 1.

Next, the electrical configuration and operation of the disc loading device will be described with reference to FIGS.

FIG. 8 shows a block diagram of the disk loading device of this embodiment, which are provided on the circuit board 120. That is, the laser drive circuit 430 operates to operate the optical pickup (optical head) 9
The disk 10 is irradiated with laser light from the optical disk 9, the signal of the disk 10 is received from the light receiving portion of the optical head, and processed by the reproduction signal processing circuit 431. 432 is the modulation and demodulation circuit,
433 is a RAM of memory, 434 is a central processing unit (MP
U) and 435 are personal computers (PC). A temperature sensor is incorporated in the optical head to measure the temperature near the recording film of the disk 10.

Reference numeral 436 is a PWM drive circuit for the motor system. PWM is an abbreviation of Pulse Wave Modulation. For example, a constant voltage is supplied in a pulse form as shown in FIG. 9A, and the supply width of the pulse is changed so that the supply width becomes as shown in FIG. 9B. Accordingly, the drive circuit can supply a current corresponding to the integral of the supply pulse to the loading motor 61.

The PWM drive circuit can set the drive current of the motor 61 more finely, and if the profile of the current supply is set by the firmware, it is not necessary to change the circuit constant or the drive mechanism. In addition, it can be used to reduce operating noise and improve the reliability of the mechanism.

In general, it is preferable that the loading operation sound during actual use is low, so the gear ratio and firm specifications of the loading mechanism are set assuming a standard disc. There is a problem such as being unable to transport.

In the present invention, by changing the specifications of the firmware outside the guaranteed temperature of the load eject operation at the guaranteed temperature and outside the guaranteed temperature of the low temperature (for example, 5 degrees or less) where the load of the loading mechanism becomes large depending on the temperature environment. The above problems are solved. The temperature sensor of the optical head is used for temperature measurement for switching.

FIG. 10 and FIG. 11 show profiles of the PWM drive circuit of the disk loading device of the present invention during loading and during ejection. The vertical axis represents the pulse supply amount of the PWM drive circuit relative to the reference voltage in percentage, and the horizontal axis represents the operating time. For example, when the reference voltage is 12 V and the pulse supply amount is 50%, the current at the time of constant voltage drive of 6 V is applied to the motor. Duty (%) of PWM drive is X <A
The relationship is <B <C <D <E.

FIG. 10A shows the profile of the PWM drive circuit at the time of loading within the guaranteed temperature range (normal operating temperature). (A1) is a normal loading operation. During the time-consuming loading of the disc, the pulse supply amount is increased from A% to B% and then fixed to B% to reduce the loading noise. In order to eliminate the collision noise, the pulse supply amount at the time of Tc which is the disc clamping is set to X% of the minimum value. Then, in a traverse-based movement (TB raising / lowering operation) that requires a large force and ends instantaneously, the pulse supply amount is gradually increased from X% to C%, for example, linearly. Te indicates the time when loading is completed. After that, it corresponds to the high load loading described below, and the increase of the pulse supply amount is continuously increased to C% at the time point T after the time point Te, further increased from C% to E%, and timed out at the time 2T. I am trying.

(A2) is a high load loading operation. The disk loading operation starts from A% and the pulse supply amount C
%, And the TB lifting operation is E%. When the cartridge 1 or the shutter is a molded product, the shutter opening / closing operation of the cartridge 1 depends on the environmental temperature due to the warpage or the temperature shrinkage, and thus becomes a large load when the disk is transported. Further, due to a change over time, a sliding load on the cartridge 1 and the shutter increases and slipping between belts and pulleys of the loading mechanism occurs, so that the transmission torque decreases and a large load is applied when the disc is transported.

In the disk loading operation at the time of high load due to such cartridge transportation, the disk which could not be loaded at B% initially shifts to C% with the passage of time, so that the disk can be loaded without a feeling of discomfort, and the TB lifting operation is also possible. By performing at E%, it is possible to adopt a configuration that does not cause a trouble in actual use.

At this time, the time-out is set to be more than twice the normal loading time, and the pulse supply amount at the time-out is set to C% and then to E%, which is the highest. There is.

FIG. 10 (b) shows the profile of the PWM drive circuit at the time of loading outside the guaranteed temperature. The temporal change pattern of the profile is shown in FIG.
Although it is almost the same as (a), the duty ratio and the operating time at each duty ratio are different.

(B1) is a normal loading operation.
Starting from the PWM pulse supply amount B% at the guaranteed temperature, assuming that the disc will be taken in and out at the beginning of the midwinter morning (a1)
The pulse supply amount is C% larger than B% of. The time Tc at the time of disc clamping is set to A% which is larger than X% in (a1). After that, it gradually increases to D%, but the time point Te in the middle becomes the loading completion time point.

Generally, the load of the loading mechanism at low temperature is 1.5 times or more as large as that at normal temperature. Therefore, a certain point of D% is set to 2T and the timeout is set to 4T, which is 4 times the normal loading time within the guaranteed temperature. It is provided more than twice.

(B2) is a high load loading operation, which corresponds to (a2), but after the time point Te, the increase of the pulse supply amount exceeds B% to C% and becomes D%, and the disk loading operation is performed. There is.

In this way, the timeout is set to be twice or more the normal loading time outside the guaranteed temperature, and
The pulse supply amount at the time-out is set to be the highest from D% to E%.

FIG. 11A shows the profile of the PWM drive circuit at the time of ejection within the guaranteed temperature.

(A3) is a normal eject operation. Until the time point Tc when the clamper and the disc are disengaged, the pulse supply amount is set to the minimum value of A% to reduce the noise of the clamper release sound, and the traverse base movement which requires a large force and ends in an instant starts from A%. It is carried out by the time it is raised to C%, and the disk unloading operation is carried out at B% to reduce the noise of loading. At time Te, the disk unloading operation is completed. After that, it corresponds to the high load eject operation, and it is increased from B% to C% and further to E%. The time-out is set to 2T with respect to a certain time point T when the pulse supply amount is C%.

(A4) is a high load eject operation.
In eject operation at high load, TB up / down operation is A%,
Perform B% and C%, and perform disk unloading operation by C%, D%, and E
Since it is performed in%, the disc can be ejected without any discomfort, and a configuration that does not cause any trouble in actual use can be obtained.

Thus, the timeout is set to be twice or more the normal eject time, and the pulse supply amount at the time of timeout is set to be the highest.

FIG. 11B shows the profile of the PWM drive circuit at the time of ejection outside the guaranteed temperature.

(B3) is a normal eject operation. It is set to be larger than the PWM pulse supply amount at the guaranteed temperature, assuming that the disc will be taken in and out at the beginning of the midwinter morning. First, the pulse supply amount is set to B% until the time point Tc at which the clamper and the disc are disengaged from each other, and the noise of the clamper release sound is reduced to give priority to reliability. The TB lifting operation is also performed at B%, and the disk unloading operation is performed at D%. The time point Te indicates the time when the ejection is completed. After that, it will be under heavy load, and time point 2
D% is continued until a certain point when T is exceeded, then it is raised to E% and time-out occurs at 4T.

Generally, the load of the loading mechanism at low temperature becomes 1.5 times or more as large as that at room temperature, and thus the timeout is set at 4 times or more of the normal eject time.

(B4) is the eject operation under high load. The TB ascending / descending operation is performed at B% and D%, and the disk is unloaded at D% and E% from around time 2T.

FIG. 12 shows the control system. The above shows the profiles for each temperature and each medium, but this is a profile learning control device that changes the profile according to individual differences, changes over time, and the like, and the driving circuit 436 that drives the loading motor 61 and the driving time are Timing means for measuring, detection SW (switch) for detecting completion of loading or unloading of tray, cartridge or disk, that is, completion of loading, control means for controlling drive voltage according to a predetermined profile, drive processing for detecting loading completion An arithmetic means for executing a predetermined arithmetic processing according to the number and the measurement time is provided. The control means adjusts the drive time according to the calculation result of the calculation means, and obtains in advance the "end position when the profile of the clamper noise is small".
To converge to.

The arithmetic means may include, for example, measuring means, which are composed of MPU 434 and PC 435. This calculation means is shown in FIG.
A driving process number is assigned in advance to the driving profile along the driving profile of (a) every predetermined time such as every predetermined unit or each inflection point, and the driving process number when the end is detected by the detection switch is obtained in advance. If the number is larger than the optimum number, the value of the main drive time T is increased, and if it is smaller than the optimum number, the value of T is decreased. In particular, when the point of engagement or disengagement with the disk when the disk is held by the clamper on the turntable that constitutes the holding means is selected as the inflection point, the noise generated when the clamping mechanism releases the medium is reduced. Is possible.

Explaining one example in detail with reference to FIG. 12B, the inflection point of the driving profile at the time of loading is divided into flat portions and inclined portions of the profile, and the inclined portion between the inflection points P and Q is further divided. Drive processing numbers are assigned in order from the smallest time point. The range in which the profile is deformed is set to drive time T of drive process number 2.
Then, the driving time T is adjusted so that the loading completion time Te detected by the detection switch in FIG. 10 is in the driving process number 5.

In this case, the arithmetic means may be configured to allocate a unique value xt to each driving process number x other than the optimum number N and add xt to T when the driving process number x ends. If x is less than or equal to the optimum number, it takes a negative value. The drive processing number at the time of completion detection and the addition time to T are controlled by the following Table 1. In this case, the driving process number 5 is obtained in advance as the end position when the profile is low in the noise of the clamper sound. That is, N = 5, x
t = t1 to t4, t6 to t9, t1 <t2 <t3 <t
4, and t6 <t7 <t8 <t9. Table 2 shows specific values of the addition time.

[0120]

[Table 1]

[0121]

[Table 2]

Alternatively, the calculating means can be realized by multiplying the difference (x−N) between the end number x and the optimum number N by the time of the coefficient A and adding it to T.

The initial value of the main driving time T can be switched according to the input of the cartridge detection switch or the measured temperature to form a profile corresponding to the difference in media and the change in temperature.

Explaining one mode of operation, the control means drives the motor 61 via the drive circuit according to a predetermined profile. Now, when an input from the loading completion detection switch is received during driving with the driving process number 7, the calculating means t7 is executed at the execution time T of the driving process number 2.
Is added. The next time the loading drive is executed, the execution time of drive process number 2 is long, so
The detection switch will detect completion with a number of 7 or less. Next, if completion is detected in drive processing number 6, at this time, t6 is added to T. Similarly, the next time the drive processing is executed, the completion detection will be performed with a number of 6 or less. In this way, by controlling the time T of the drive processing number 2 so as to detect the completion with the drive processing number of “the smallest clamp sound”, for example, the number 5 which has been checked in advance, the mechanism control with excellent quietness can be achieved. To be realized.

FIG. 12C shows the change of the profile during the carry-out operation. As in the case of FIG. 12B, the flat portion and the inclined portion are separated for each inflection point of the profile, and the inflection point is separated. The PQs are separated by a predetermined unit of time, and drive process numbers are sequentially assigned. The range in which the profile is deformed is defined as the drive time T of drive process number 1. Then, as in the case of loading, Te
The drive time T is adjusted so that is in the period of drive process number 6. As a result, by controlling the time T of the drive processing number 1 during the unloading operation, it is possible to achieve the same quietness as at the time of loading.

Since the profile can be changed according to the actual measurement time of the loading operation and the ejecting operation as described above, the following noise reduction is possible. That is, a profile that does not generate noise when the medium is loaded when the clamper is adsorbed is obtained in advance, the loading time is measured, and the timing at which the clamper 84 sandwiches the disk 10 engaged with the spindle motor 90 is learned and controlled. By doing so, it is possible to reduce the impact noise generated by the attraction force between the magnet and the magnetic body generated by the disc clamp. Further, the sound deadening effect can be exhibited regardless of the individual difference of the loading mechanism or the difference of the clamp timing due to the change over time.

Further, the tray 20 is provided with a means for detecting a cartridge, and when the medium mounting on the tray is completed, it is discriminated whether the cartridge is a cartridge or not. At this time, in each case, a standard profile that minimizes the noise during adsorption of the clamper during loading is obtained in advance. Then, by measuring the loading time and learning control of the timing at which the clamper sandwiches the disk engaged with the spindle motor, the delay of the loading learning effect when different media are loaded on the tray is prevented, and the sense of incongruity is felt. Without it, it is possible to reduce the impact sound generated by the attraction force between the magnet and the magnetic body generated by the disc clamp.

Similarly to the above, a profile that does not cause noise when the clamper is detached when ejecting the medium is obtained in advance, the time when ejecting is measured, and the disk 10 engaged with the spindle motor 90 is clamped by the clamper 84.
By learning-controlling the timing of sandwiching, it is possible to reduce the impact sound generated when the attraction force between the magnet and the magnetic body generated by the disc clamp is released. Further, the sound deadening effect can be exhibited regardless of the individual difference of the loading mechanism or the difference of the clamp timing due to the change over time.

Also in this case, as in the case of loading,
A means for cartridge detection is provided in the tray, and when the medium is completely loaded in the tray, it is discriminated whether it is a cartridge or non-cartridge, and the standard profile that minimizes the noise when the clamper is removed and attached at the time of ejection in each case Preliminarily obtained, by measuring the time at the time of eject and learning control of the timing when the clamper sandwiches the disk engaged with the spindle motor, the delay of the loading learning effect when loading different media on the tray is prevented. Thus, it is possible to reduce the impact sound generated by the attraction force between the magnet and the magnetic body, which is generated by the disc clamp without a feeling of strangeness.

The means for detecting the cartridge may be provided on either the cartridge side or the mechanical chassis side.

In this embodiment, the timeout of the disc transport time is set to be more than twice the standard time in the PWM profile described above, and the PWM drive duty is increased at the end of loading and at the end of ejection. It is possible to increase the reliability of the loading operation against the change of the belt with time and the increase of the load on the mechanical section.

Furthermore, a temperature sensor is provided in the drive,
When the temperature is lower than the guaranteed operating temperature, the motor has a rotation speed of the motor against the increase of the loading load at the cold start such as the first in the winter morning as the loading specification to operate with the power-up PWM profile, which is different from the silent PWM profile. It is possible to increase the torque to secure the torque, and to increase the reliability of the loading operation against the change with time of the rubber and the belt and the increase in the load of the mechanical section.

In the present invention, the means for detecting the loading / unloading of the disk is not limited to mechanical detection, but physical detection such as electrical detection such as change of motor current or magnetic detection is possible. is there.

Further, the media discriminating means is not limited to the mechanical discriminating, but physical detection such as electricity is possible.

Further, the change of the profile is not limited to the change of the operation time length, but may be the change of the magnitude of the current supplied to the motor.

[0136]

According to the disk loading device of the first aspect of the present invention, a feeling of strangeness due to a difference in loading speed depending on the type of medium and the presence / absence of a medium, and variations in loading time due to individual differences of the disk loading device and changes with time, and during driving. It is possible to reduce the noise.

According to the disk loading apparatus of the second aspect, it is possible to wipe off the feeling of strangeness due to the speed difference immediately after the medium is switched by the dual-purpose loading mechanism corresponding to a plurality of types of media and reduce the noise during driving.

According to the disk loading device of the third aspect, it is possible to reduce variations in the loading time and the ejecting time of the drive system of the disk loading device due to temperature changes.

According to the disk loading device of the fourth aspect, in addition to the same effects as those of the first, second and third aspects, the time measurement results at the time of loading and at the time of ejecting, and the type of the mounted medium. It is possible to obtain the drive profile according to the size, size, individual difference of the disc loading device, change over time, and change in temperature.

According to the disk loading device of the fifth aspect, in addition to the same effect as the fourth aspect, it is possible to reduce the noise generated when the clamp mechanism holds the medium at the time of loading.

According to the disk loading device of the sixth aspect, in addition to the same effect as the fourth aspect, it is possible to reduce the noise generated when the clamp mechanism releases the medium at the time of ejecting.

According to the disk loading device of claim 7, claim 1, claim 2, claim 3, claim 4,
In addition to the effect similar to claim 5 or claim 6, by using an algorithm, the measurement results of the loading time and the eject time, and the drive profile prepared in advance,
The learning control of the drive mechanism can be performed at high speed and with fast convergence.

According to the disk loading device of the eighth aspect, in addition to the same effect as the seventh aspect, by using this algorithm, the measurement results of the loading time and the ejection time and the drive profile prepared in advance are used.
The learning control of the drive mechanism can be performed at high speed and with fast convergence.

According to the disk loading device of the ninth aspect, in addition to the same effect as the seventh aspect, the algorithm is used to measure the loading time and the ejection time, and the drive profile prepared in advance is used to drive the drive mechanism. Learning control can be performed at high speed and with fast convergence.

According to the disk loading device of the tenth aspect, the same effect as that of the second aspect can be obtained.

According to the disk loading device of the eleventh aspect, the same effect as that of the third aspect can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a mechanical structure according to an embodiment of the present invention.

FIG. 2A is a perspective view of a tray, and FIG. 2B is a perspective view of a cartridge holder.

FIG. 3 is a perspective view before placing a cartridge on a tray.

FIG. 4 is a perspective view of the tray as viewed from the back side.

5A is a perspective view showing a tray and a clamper, FIG.
FIG. 6B is a perspective view of the tray in a completely loaded state.

FIG. 6 is a perspective view of the cartridge with the shutter opened and the slide cam seen from the back side.

7A is a plan view of a traverse base, and FIG. 7B is a side view thereof.

FIG. 8 is a block diagram of an electric control system.

9A is a waveform diagram of a PWM drive voltage, and FIG. 9B is a PWM drive current thereof.

FIG. 10 is an operating time on the horizontal axis and a PWM driven Dut on the vertical axis.
It is a profile of the loading operation as y (%), and (a)
Shows a loading operation within the guaranteed temperature range, and (b) shows a loading operation outside the guaranteed temperature range.

FIG. 11 is an operating time on the horizontal axis and a Dut of PWM drive on the vertical axis.
It is a profile of the carry-out operation as y (%), and (a)
Shows eject operations within the guaranteed temperature range, and (b) shows eject operations outside the guaranteed temperature range.

FIG. 12A is a block diagram of a control system for changing the profile of the driving means, FIG. 12B is a driving profile at the time of loading with a driving process number assigned, and FIG. 12C is a driving profile at the time of ejection with a driving process number assigned. It is a driving profile.

FIG. 13 is a perspective view of a conventional example.

FIG. 14 is an exploded perspective view thereof.

FIG. 15 is a sectional view.

[Explanation of symbols]

1 cartridge 10 discs 20 trays 27 Cartridge holder 61 loading motor 84 Clamper 90 Spindle motor 99 optical pickup

Continued front page    (72) Inventor Yasuo Stocka             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. F term (reference) 5D046 AA20 BA14 CB16 EA15 EB04                       FA04 GA15 GA20 HA10

Claims (11)

[Claims] 1. A drive means for loading and unloading a disk into and from the apparatus, a control means for controlling the drive means according to a predetermined drive profile, a detection means for detecting completion of loading and unloading by the driving means, The control means includes an arithmetic means for measuring the loading and unloading times of the disk by the driving means based on the detection result of the detection means, and a holding means for rotatably holding the disk at the recording / reproducing position. A disk loading device, wherein the drive profile is changed according to the measurement time of the computing means. 2. A drive means for loading and unloading a disk into and from the apparatus, a control means for controlling the drive means according to a predetermined drive profile, a detection means for detecting completion of loading and unloading by the drive means, Calculating means for measuring the loading and unloading times of the disk by the driving means based on the detection result of the detecting means; and media discriminating means for discriminating the form and size of the disc,
Holding means for rotatably holding the disk at a recording / playback position, the control means changes the drive profile for each medium according to the determination result of the medium determination means, and the measurement time of the calculation means is changed. A disk loading device, wherein the drive profile is changed according to the driving profile. 3. A drive unit for loading and unloading the disk into and from the apparatus, a control unit for controlling the drive unit according to a predetermined drive profile, a detection unit for detecting completion of loading and unloading by the driving unit, Arithmetic means for measuring the loading and unloading times of the disk by the driving means based on the detection result of the detecting means, the measuring means for the internal temperature of the apparatus, and the disk rotatably held at the recording / reproducing position. Holding means, the control means changes the drive profile for each predetermined temperature according to the measurement result of the internal temperature, and changes the drive profile according to the measurement time of the calculation means. Disk loading device. 4. The control means changes the operation time of the drive means by the drive processing number assigned to each inflection point of the drive profile and the arithmetic processing based on the measurement result of the carry-in and carry-out time obtained by the arithmetic means. The disk loading device according to claim 1, claim 2 or claim 3. 5. The disc loading apparatus according to claim 4, wherein a point at which the disc engages with the holding means is selected as an inflection point in a drive profile when the disc is carried into the apparatus. 6. The disk loading device according to claim 4, wherein a point at which the disk engages and disengages with the holding means is selected as an inflection point in the drive profile when the disk is carried out from the inside of the apparatus. 7. The computing means provides a variable as a main driving time in the driving profile, allocates a driving process number to the driving profile at every certain time, and the driving process number detected by the detecting means as an end is an optimum number obtained in advance. 3. The operating time of the drive means is made longer if it is larger, and the operating time of the drive means is made shorter if the drive processing number detected by the detecting means to end is smaller than an optimum number obtained in advance. The disk loading device according to claim 3, claim 4, claim 5, or claim 6. 8. The arithmetic means allocates a value unique to the driving process number other than the optimum number, and when the driving process is completed with the driving process number, the value unique to the driving process number is set to the operating time of the driving means. The disk loading device according to claim 7, wherein 9. The disk loading apparatus according to claim 7, wherein the arithmetic means multiplies the difference between the drive processing number and the optimum number by a coefficient and adds the difference to the operating time of the drive means. 10. A drive unit for loading and unloading the disc into and from the apparatus, a control unit for controlling the drive unit according to a predetermined drive profile, a media discriminating unit for discriminating the form and size of the disc, and the disc. And a holding means for rotatably holding the recording medium at a recording / reproducing position, wherein the control means changes the drive profile in accordance with a discrimination result of the medium discriminating means. 11. A drive means for loading and unloading a disc into and from the apparatus, a control means for controlling the drive means according to a predetermined drive profile, a means for measuring the temperature inside the apparatus, and a recording / reproducing position for the disk. And a holding means for rotatably holding the disk, wherein the control means changes the drive profile according to a measurement result of the internal temperature.