JPS59135657A - Reproducing device of optical disk record - Google Patents

Abstract

PURPOSE:To attain ease of loading/unloading of a disk by providing a turning tray supported freely for elevating and descending operation while being turned in response to the going and coming of a tray main body and used for loading an optical disc and forming a couple of concaved parts for guiding the loading/ unloading of optical disk to the tray main body and the turning tray at a position where the concaved part is matched in the outgoing state for at least the tray main body. CONSTITUTION:The system is formed by the tray main body 20 freely introducing and ejecting horizontally a horizontal type disk loading mechanism 12 and a turnig tray 35 supported freely for elevating and descending while being turned in response to the going and coming of the tray main body and used for loading the optical disk 33. Then, a couple of concaved parts 203, 204 and 353,354 being loading/unloading guides of the optical disk 33 to the tray main body 20 and the turning tray 35 are formed respectively at a position where the concaved parts are matched at the ejecting state of the train main body 20. Thus, the loading/ unloading of the optical disk 33 is attained easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of an optical disc record playback device suitable for an optical DAD (digital audio disc) system.

[Technical background of the invention and its problems]

Recently, in the field of audio equipment, a dezotal recording and reproducing method using PCM (A pulse code modulation) technology has appeared and is becoming popular in order to achieve as high fidelity as possible. In other words, this is what is called digital audio, and the audio characteristics do not depend on the characteristics of the recording medium and are much superior to the conventional analog system. This is because it has been established in principle.In this case, a system that uses a disk as a recording medium is called a DAD system, and its playback methods include optical, electrostatic, and mechanical. No matter which of these regeneration methods is adopted, the regeneration equipment that embodies it must have a variety of advanced functions and performance that are not found in conventional methods. It is required to be able to satisfy the following.

For example, in an optical disc record playback device using the CD (Kono Yakume Disk) method among optical playback methods, bits (irregularities with different reflectances) corresponding to digitized (PCM) data are formed on a transparent resin disk. diameter 12 crns and thickness 1.2
A simple optical disc is driven by a CLV (constant linear velocity) method at variable rotational speeds of about 200 to 500 r, p, m. In this case, the disc has a track pitch of 1.
Considering that it is 6 μm and records a huge amount of information that can provide approximately one hour of stereo playback on one side, it is easy to see that it requires various advanced functions and performance. .

The next requirement for the above-mentioned optical disc record playback device is that each mechanical part can operate reliably with an organic and simple configuration with no waste, and that it can also be miniaturized while consuming power. Further improvements should be made to implement power saving measures to reduce the total amount of electricity consumed.

Incidentally, one of the specific targets of such a request is a disk loading mechanism. In other words, there are two types of disk loading mechanisms: vertical and horizontal.The horizontal type is said to be more advantageous in terms of controllability of the disk drive, but the horizontal type This is because, in the conventional type, it is easy to attach and detach the optical disc, and the structure is as simple as possible and high precision has not been realized.

In this case, it is not enough to simply load the disc horizontally, but also to meet various requirements for the optical disc record playback device as a whole in relation to the disc playback mechanism including the pickup drive mechanism and the disc drive mechanism. It must be something that can be handled.

[Purpose of the invention]

Therefore, this invention was made in view of the above points, and provides an extremely good optical disc that is improved so that the optical disc can be easily attached and detached in a device that employs a horizontal disc loading mechanism. The purpose is to provide a record playback device.

[Summary of the invention]

That is, the optical disc record playback device according to the present invention is equipped with a disc loading mechanism for horizontally loading an optical disc, and the disc loading mechanism includes a tray main body that is horizontally movable in and out, and the tray. It is rotatably supported to be able to move up and down in accordance with the movement of the tray body into and out of the main body, and has a rotary tray for placing the optical disc, and the tray body and the rotary tray are connected to each other. On the other hand, it is characterized in that a pair of recesses for guiding the attachment and detachment of the optical disc are formed at positions that match at least when the tray body is in the extended state.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. That is, FIG. 1 shows the external appearance of a CD type optical disc record reproducing apparatus to which the present invention is applied, and 11 is a cabinet. The front panel of this cabinet 11 has a DAD (hereinafter referred to as disk) loading mechanism section 1.
2 is provided in a so-called horizontal loading type that can be freely moved in and out in the directions of arrows (A) and (B) in conjunction with the operation of the loading (LOADING) key 13, and the disc is placed horizontally on the tray part. The device is horizontally carried and installed in the drive position of the regeneration reservoir, and the details will be described later.

Reference numeral 14 in FIG. 1 is a power key that is operated prior to operating the loading key 13. Hereinafter, a display section 15 is disposed on the upper right side of the loading mechanism section 12, and the display section 15 is In the lower row, there is a play key (PLAY) for play operation, a stop key (5TOP),
Next key (, NEXT), Fast forward key (F, F) for fast forward operation, Pa.

The operation unit 16 has a pack word key (BWD) for word operation, a 6-pause key (PAUSE), and a repeat key (REP HOT).
3 are arranged in parallel.

FIG. 2, FIG. 3, and FIG. 4 show the states of the loading mechanism section 12 before, during, and after disk loading, respectively. First, in FIG. 2, reference numeral 17 denotes a mounting structure serving as a main chassis having an approximately inverted concave shape to which the loading mechanism section 12, clamper mechanism 18, disc playback mechanism section 19, etc. are attached.
A generally rectangular tray body 20 for mounting a disc is disposed so as to be movable in the directions of arrows (4) and (B). That is, as shown in FIG. 5, this mounting structure 17 has a pair of collars 171 and 171 formed at both ends thereof for installing the cabinet 11 (see FIG. A guide portion 172 having a substantially concave shape is formed therein. The guide portion 172 is provided with a pair of guide rollers 1' 13 and 174 on the inside of both sides thereof, and a loading drive motor 21 is provided near one end of the bottom surface thereof.

This motor 21 has a driving gear 22 coaxially provided on its rotating shaft 211, and this driving gear 22 has a first gear. Second. Third. The fourth and fifth reduction gears 23 to 27 are sequentially meshed.

Further, a locking gear 28 for locking corresponding to the fifth reduction gear 27 is installed at one end of the base end of the upper surface of the mounting structure 17.

The lock gear 28 has its rotating shaft 281 inserted through both ends of a substantially concave mounting portion 175 formed in the mounting structure 17, and first eccentric cams 29 for lock driving are located near both ends of the mounting portion 175. A second eccentric cam 30 for driving the clamper is coaxially provided. Furthermore, the mounting part 1
75 is provided with a rotation shaft 176 substantially parallel to the rotation shaft 281, and the lock member 31 is supported on the rotation shaft 176. This locking member 31 has a lock groove 311 formed at its distal end, and a driving sliding contact portion 312 for slidingly contacting the first eccentric cam 29 at its base end. A spring (not shown in FIG. 5 for convenience) is engaged between the base end portion of the locking member 31 and the mounting portion 175, so that the locking member 31 is biased counterclockwise in the figure.

On the other hand, the second eccentric cam 30 is connected to the first eccentric cam 2.
9, and first and second locking grooves 301 for the clamper lock are provided at the lowest and highest eccentric positions.
．． 302 is formed.

Here, the mounting structure 17 has a through hole 177 formed approximately in the center of its upper surface. This through hole 177 includes a disc playback mechanism, which will be described later, including a turntable 34, etc., which has a fitting part 341 that is inserted into the hole of the big ara f32 and the optical disc 33 (indicated by the dotted chain line in FIG. 2). Part 19 The pick-up (feed) drive mechanism and disk drive mechanism are integrated, but the loading direction (arrow (A)
) and (B) direction) and are arranged as a unit on a mounting body 50 that becomes a sub-chassis.

9- Also, the mounting structure 17 has the mounting portion 1 on its upper surface.
A pair of support stands 178 and 178 for supporting the crank i4 are erected at both ends corresponding to the cranks 75.

Here, a loading mechanism configured to be attached to the attachment structure 17 configured as described above will be explained. That is, as shown in FIG. 2 again, the tray main body 20, on which the disk 33 shown by the two-dot chain line in the figure is mounted, is disposed on the mounting structure 17. This tray body 20 has a through hole 20 corresponding to the disk 33 approximately in the center thereof.
1 is formed, and a plurality of guide grooves 202 (only one location is shown in FIG. 4 for convenience of illustration) are formed at predetermined intervals on the inner circumferential wall of the through hole 201, each inclined downward. A rotating tray 35 on which the disk 33 is placed is installed in the through hole 201. The rotating tray 35 has a plurality of protrusions 351 (only one portion is shown in FIG. 4 for convenience of illustration) corresponding to the plurality of guide grooves 202 of the through hole 201 formed at predetermined intervals on its peripheral edge. 10-, and the plurality of protrusions 3 are attached to the tray main body 20.
51 is guided by the plurality of guide grooves 202 and is freely rotatable in the direction of the clock and half-hour hand in the figure, and is also vertically movable.

In addition, the rotary tray 35 is provided with a loading direction (i.e., an arrow (A),
A laser irradiation through hole 352 located in the direction (B) is formed from the center toward the outer circumference. After the disc is loaded, the rotating tray 35 is rotated counterclockwise in the figure with its plurality of protrusions 351 guided by the plurality of guide grooves 202, as shown in FIG. The device is tilted at a predetermined angle with respect to the loading direction in order to be lowered, and the details of its drive system will be described later.

Here, the tray main body 20 and the rotary tray 35 each have a pair of recesses 2θ3.2 that serve as guide portions for attaching and detaching ice cream.
04, 353, and 354, respectively, are formed at positions that coincide with each other before and during disk loading, as shown in FIGS. 2 and 3 (this may be at least in the extended state of the tray body 20). Of these, the concave portions 353 and 354 of the rotary tray 35 are located at the fourth position after disk loading, when the rotary tray 35 is rotated counterclockwise in the figure with respect to the tray main body 20, as described above.
As shown in the figure, the recess 353.35 of the tray body 20
4, respectively.

Further, the tray main body 20 has guide members 3 at both ends thereof.
6.37 are formed extending from one end thereof in correspondence with the guide portions 172 of the mounting structure 17, respectively. These guide members 36 and 37 each have a guide groove portion 3.
61 (for convenience of illustration, the guide member 37 is not shown) is formed corresponding to each guide roller 173, 174 of the guide portion 172 of the mounting structure 17. Therefore, the tray main body 20 is guided by the guide grooves 361 of the guide members 36 and 37 engaging with the rollers 173 and 174 of the guide part 172 of the mounting structure 17, as shown by arrow (A).
It is movable in direction B).

Here, the tray body 20 has a fixed rack 38 for loading drive and a movable rack 3 on the lower surface of one side end thereof.
9 are arranged in a stacked state as shown in FIG. That is, the fixed rack 38 is attached to the tray main body 2.
0, corresponding to the third reduction gear 25 of the mounting structure 17, and guide pins 381 and 382 are protruded from the upper surface thereof at predetermined intervals.

On the other hand, guide holes 391 and 392 are formed in the movable rack 39 disposed on the upper surface of the fixed rack 38, and guide pins 381 and 382 of the fixed rack 38 are inserted into the guide holes 391 and 392, respectively. has been done. The movable rack 39 has a first toothed portion 393, the details of which will be described later, formed at its distal end corresponding to the fifth reduction gear 27 of the mounting structure 17, and a second toothed portion 393 formed at its proximal end. A toothed portion 394 is formed corresponding to the lock gear 28. A movable portion 395 is formed at the tip of the movable rack 39 to protrude inwardly 13-, and a pin 396 is formed at the tip of the movable portion 395. And this pin 3
One end of the drive member 40 is rotatably supported by the drive member 96, and the other end of the drive member 46 is rotatably supported by a pin 355 protruding from the rotary tray 35.

Further, as shown in FIG. 2 again, a locking protrusion 41 is formed at the base end of the tray body 20, and this protrusion 41 is provided with a locking groove 311 of the locking member 31 of the mounting structure 17. A lock pin 411 is formed correspondingly.

Here, the loading mechanism section 1 configured as described above is
The second operation will be explained in detail.

That is, when the loading key 13 (see FIG. 1) is operated in the state before disk loading shown in FIG. 2 to mount the disk 33, the motor 21 is driven and the gear 22 is rotated counterclockwise in the figure. This rotational force is then transmitted to the first gear 22 through the gear 22. Second. 3rd ° Transmitted to the fourth and fifth reduction gears 23 to 27 14
− can be done. At this time, the third
Since the reduction gear 25 is rotationally driven in the counterclockwise direction in the figure, the tray main body 2o is moved furthest in the direction of arrow (B) as shown in FIG. 7 and its movement is stopped. Here, the third reduction gear 25 is detached from the tip of the fixed rack 38, and at this time, the fifth reduction gear 27, which is further decelerated and driven in the same direction, is removed from the first end of the movable rack 39. Teeth 3
93, and the lock gear 28 is meshed with the second tooth portion 394 of the movable rack 39. The movable rack 39 is then moved to the position shown in FIG. 8 by the fifth reduction gear 27. At this time, the movable rack 39 has a movable portion 395 with an arrow (
By being moved in direction B), the driving member 4° presses against the bin 355 of the rotating tray 35. Therefore, the rotary tray 35 is lowered while rotating counterclockwise in the figure with the plurality of protrusions 351 guided by the plurality of guide grooves 202 of the tray main body 2o. Here, the rotating tray 35 has a through hole 352 for laser irradiation in the feeding direction of the pickup 32 (in other words, arrow (C), (
D) direction).

On the other hand, when the movable rack 39 reaches the position shown in FIG. 10 from the position shown in FIG. is rotated counterclockwise in the figure. At this time, the first eccentric cam 29 of the lock gear 28 presses the sliding contact portion 312 of the lock member 31 and
resists the biasing force of the spring 60 and rotates its rotation shaft 17.
6 in the counterclockwise direction in the figure. Therefore, as shown in FIG. 11, the locking groove 311 of the locking member 31 locks the locking pin 411 of the locking protrusion 4 of the tray 2Q, and the tray 20 is in the disk loading completed state. At the same time, the protrusion 282 provided on the rotating shaft 281 turns off the switch 42 and stops the motor 21.

As shown in FIG. 4, when the disc 33 is mounted on the turntable 34 and the disc 33 is to be removed, first the queen loading key 13 is operated and the motor 21 is reversed by a control circuit (not shown). Driven. Therefore, the disc loading mechanism section 12 performs an operation substantially opposite to that when loading the disc 33 onto the turntable 34, and the tray main body 20
is moved in the direction of arrow (4) to reach the disc mounting position shown in FIG.

Here, with the disk loading completed as described above, the disk 33 is pressed against the turntable 34 to support it. -Describe the machine JflltlB. That is, as shown again in FIG.
are supported in a chained manner. A shaft 44 is supported on the lower surface of the mounting member 43 approximately in the center thereof and approximately parallel to the mosquito mounting member 43, and a middle portion of a clamper lever 45 is rotatably supported on this shaft 44. Supported. This clamper lever 45 has an extending portion 451 formed at its base end, and the extending portion 451 is inserted into a position regulating recess 179 formed in the mounting portion 175 of the mounting structure 17. Further, the clamper lever 45 has a clamper part 46 formed of a magnetic material in a cylindrical shape with a bottom at its tip facing the turntable 34.
is supported with appropriate play. This clamper portion 46 has a collar portion 461 formed at its tip that locks the vicinity of the hole in the disk 33, and is fitted into the fitting portion 341 of the turntable 34 via the disk 33 due to its magnetic force. It is something.

A spring 47 is engaged between the tip of the crank lever 45 and the mounting member 43, and the elastic force of the sill 47 biases the crank lever 45 in a direction away from the turntable 34. It is something that exists.

Further, a substantially concave drive lever 48 is rotatably supported at both ends of the shaft 44 supported by the clamper lever 45. That is, as shown in FIG. 9, this drive lever 48 has its base end slidably in contact with the second eccentric cam 30, and has first and second lock grooves of the second eccentric cam 30. An engaging portion 481 that selectively engages 301 and 302 is formed. Then, the drive lever 4
One end of a torsion spring 49 wound around the shaft 44 is engaged with the spring 8, and the other end of the l-john spring 49 is engaged with the base of the clamper lever 45. For this reason, the drive lever 48 and the Clasono 9-lever 45 are configured to rotate together in conjunction with each other.

Here, the crank z+- mechanism 18 configured as described above
The operation will be explained. That is, when the tray body 20 is loaded in the direction of arrow (B) as described above, the movable rack 39 reaches the position shown in FIG. 10 from the position shown in FIG. is meshed with the lock gear 28 to rotate the lock gear 28 counterclockwise in the figure. Therefore, the second eccentric cam 30 provided coaxially with the lock gear 28 is rotationally driven in the same direction. At this time, this second eccentric cam 30 is
The engaging portion 481 of the drive lever 48, which is locked in the lock groove 30, is brought into sliding contact with the peripheral edge of the second eccentric cam 30 and moved to the second lock groove 302 as shown in FIG.
to be locked. Therefore, as shown in FIGS. 12(a) and 12(b), the engaging portion 481 of the drive lever 48 is pressed against the peripheral edge with the rotation of the second eccentric cam 3θ, and the driving lever 48 is rotated about the shaft 28. It is rotated counterclockwise in the figure. Here, the drive lever 48 rotates the clamper lever 45 in the same direction as the drive lever 48 rotates, so that the clamper portion 46 of the clamper lever 45 is connected to the fitting portion 341 of the turntable 34.
to fit. At this time, as mentioned above, the tray body 20
Since the rotary tray 35 is lowered while being rotated with respect to the tray body 20, the clamper part 46 presses the disk 33 against the turntable 34 by its magnetic force, and here the turn of the disk 33 is caused. table 3
4 has been completed.

Further, in the clamped state of the disk 33 as described above, when the disk loading mechanism is reversed as described above, the movable rack 39 is moved in the direction of arrow (A). Therefore, since the lock gear 28 is reversed, the drive lever 48 and the clamper lever 45 perform an operation substantially opposite to the above-mentioned flange operation, and are returned to their original positions. Omitted.

FIG. 13 shows details of the first tooth portion 393 of the movable rack 39. That is, the first tooth portion 393
A notch 397 for preventing meshing and locking is formed near the root of the tooth from the base end to a predetermined position. The first tooth portion 393 has, for example, two tooth tips notched at an acute angle as shown by diagonal lines in the figure from the base end of the first tooth portion 393.A notched tooth portion 398 for preventing engagement and locking is formed in the first tooth portion 393. There is.

As described above, when the fifth reduction gear 27 is engaged with the notch tooth portion 398 of the first tooth portion 393 of the movable rack 39 by utilizing the elasticity of the notch portion 397, the fixed rack The third reduction gear 25 is removed from the tip of the gear 38. In this way, the first tooth portion 393 has its notch 3
Due to the elasticity of 97, the third and fifth reduction gears 25.2
This prevents a locked state caused by simultaneous meshing of the motors 7 and 7, and prevents overloading of the motor 21, thereby promoting power saving measures.

Furthermore, by forming the notch tooth portion 398 on the first tooth portion 393 of the movable rack 39, the transmission of the rotational force of the motor 21 is reduced from the third reduction gear 25 and the fixed rack 38 to the fifth tooth portion 393. reduction gear 27 and the first movable rack 39
This prevents an overload condition due to simultaneous meshing when shifting to the tooth portion 393, allowing smoother operation and promoting power saving measures.

22- Next, the disk playback mechanism section 19 that plays back the disk 33 will be explained. As shown in FIGS. 2 and 5 again, the mounting structure 17 that becomes the main chassis has a plate in its through hole 177. A mounting body 50 that becomes a subchassis of
is screwed in with a screw 51 via a damper at a predetermined angle with respect to the loading direction. A substantially rectangular pickup guide through hole 501 is formed in this mounting body 50, and the pickup 32 is disposed in the through hole 5θ1 via a pickup mounting base 52.

Here, the pickup 32 is lowered by rotating the rotary disk 35 (see FIG. 4) as described above when the disk loading is completed, so that the laser irradiation through hole 352 of the rotary disk 35 is rotated and lowered. It is disposed at a predetermined angle with respect to the loading direction so as to correspond to the arrows (C) and (D), and is movable in the directions of arrows (C) and (D). During the movement process, the pickup 32 irradiates the disk 33 with a laser beam and receives its reflected light. The disc 33 is linearly moved from the inner circumference toward the outer circumference at a predetermined speed.

Further, the turntable 34 constituting a disk drive mechanism is rotatably disposed in the mounting body 50 near one side of the through hole 501.

The base end of the turntable 34 is connected to a turntable drive motor shaft (not shown) via a bearing 340, and a predetermined control is performed by the motor in conjunction with the operation of the operation section 16 (see FIG. 1). It is designed to be rotated depending on the state.

Here, FIG. 14 shows a pickup (feed) drive mechanism for moving the pickup 32 in a predetermined direction. That is, the pickup mounting base 52
An elastic rack gear 53 (see FIG. 15) is formed at one end of the rack gear 53.
A support plate 520 made of resin and having a pair of guide support portions 521 and 522 projecting therebetween is attached.

Guide holes 523 and 524 facing each other are formed approximately at the center of the guide support portions 521 and 522, and the guide shaft and drive shaft 17 and the guide rod 54 are inserted into the guide holes 523 and 524. . A worm gear 55 corresponding to the rack gear 53 of the pickup mount 52 is coaxially fitted at a predetermined interval in the middle of the guide rod 54 . Further, after the guide rod 54 has both ends inserted through the guide holes 523 and 524, the guide rod 54 is inserted into the mounting body 52, respectively.
It is rotatably supported by bearing portions 512 and 513 formed in. One end of the guide rod 54 is connected to the bearing portion 5.
12.513, a transmission gear 56 is further coaxially provided, and a drive gear 57 is meshed with this transmission gear 56. This driving gear 57 is coaxially provided with a rotating shaft 581 of a pickup feed motor 58 installed on the lower surface of the mounting body 5θ, and is configured to transmit the rotational force of the motor 58 to the 25-transmission gear 56. is being done.

On the other hand, at the other end of the pickup mounting base 52, a clamping portion 59 is formed which clamps and guides the vicinity of the periphery of the through hole 501 of the mounting body 50 as a rail. sandwiching part 5 with
9 has a guide roller 59 at its upper end corresponding to the upper surface of the peripheral edge of the through hole 501, and a guide protrusion 592 at its lower end corresponding to the lower surface of the peripheral edge of the through hole 501. be.

That is, in order to move the pickup 32 in the direction of arrow (C) in the pickup (feed) drive mechanism configured as described above, for example, the motor 58 is driven counterclockwise in the figure and the drive gear 57 is rotated in the same direction. drive. Then, the drive gear 57 rotates the transmission gear 56 clockwise in the drawing, and rotates the worm gear 55, which is coaxially provided via the transmission gear 56 and the guide rod 54, in the same direction. At this time, by making the worm gear 55 elastically mesh with the rack gear 53 of the pickup mount 52, the pickup 26-up mount 52 moves as shown by the arrow () as the gear 55 rotates.
C) is driven linearly in the direction. Therefore, the pickup mounting base 52 has a guide support portion 521 through which the guide rod 54, which is the center of rotation of the gear 55 and the transmission gear 56, is inserted.
．． 522 and the pickup 32 guided by the clamping part 59
It is also moved in the direction of arrow (C).

In addition, when moving the big roller 7° 32 in the direction of arrow (D), by reversing the motor 58, an operation substantially opposite to the movement in the direction of the arrow () described above is performed, and it is moved in the direction of the arrow (). Therefore, its explanation will be omitted here for the sake of convenience.

Now, with the disc loading completed as described above, the operating section 160 of the cabinet 11 (see FIG. 1) is operated to play the disc 33.

Then, the turntable drive motor (not shown) is driven and the disc 3 mounted on the turntable 34 is driven.
3 is rotated to a predetermined state, and a laser beam is irradiated from the pickup 32 onto the signal recording surface of the disk 33 through a through hole 352 formed in the rotating tray 35 of the tray body 20. This laser beam hits the signal recording surface of the disk 33 and is reflected, and the reflected beam is received at a big angle of 7°32.

At this time, the pickup 32 detects the intensity and temporal length of the light, outputs an electrical signal corresponding to the intensity, and outputs an electrical signal from which the digitally encoded signal is recorded on the disk 33 and extracted. Then, the big roller 7° 32 is moved from the inner periphery to the outer periphery of the disk 33 by the pick-up feeding mechanism, and the reproduction of the disk 33 is completed.

Now, when the loading key 13 is operated again, the disc loading mechanism is reversed as described above, and the tray body 20 is moved to the position shown in FIGS. 4 and 3, and then to the disc mounting position shown in FIG. 2. This is where the disk 33 is attached and detached.

According to the optical disc record playback device as described above, the horizontal disc loading mechanism 12 can be horizontally moved in and out of the tray body 20 and rotated with respect to the tray body as the tray body is moved in and out. It is supported in a vertically movable manner and consists of a rotary tray 35 for placing the optical disc 33, and a rotary tray 35 for attaching and detaching the optical disc 33 to and from the tray body 20 and the rotary tray 35, respectively. A pair of concave portions 203, 204 and 353 that serve as guide portions,
354 at least in the extended state of the tray main body 20 (Fig. 2)
Since it is formed in a position that matches the optical disc 3
3 can be easily attached and detached.

In other words, this kind of disk attachment/detachment guide is generally formed only on the tray body side, but in that case, the outer circumferential wall of the rotary tray becomes an obstacle, making it difficult to attach and detach the disk. A pair of recesses 203 * 2σ4 and 353, 354 are formed as guide parts for attaching and detaching the optical disk 33 to the tray body 20 and rotating tray 35, respectively, at positions that match when the tray body 20 is in the extended state. This is because the outer circumferential wall of the rotary tray 29-35 does not become an obstacle, making it easier to attach and detach the disk.

It goes without saying that the present invention is not limited to the embodiments described above and illustrated, and that various modifications and applications can be made without departing from the gist of the invention.

〔Effect of the invention〕

Therefore, as detailed above, according to the present invention, in a device that employs a horizontal disk loading mechanism,
It becomes possible to provide an extremely good optical disc record playback device that has been improved so that the optical disc can be easily attached and detached.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view showing an optical disc record playback device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the disc loading mechanism and disc playback mechanism shown in FIG. 1, and FIG. and FIG. 4 are perspective views showing the operating state of FIG. 2, FIG. 5 is a 30- perspective view showing a part of FIG. 2, and FIGS. Figure 2,
Figures 3 and 4 are perspective views showing some details, Figures 9, 10, and 11 are Figures 2, 3, and 4, respectively.
A perspective view showing some other details of the figure, FIG. 12(a),
(b) is a plan view showing the operation of the crank lever shown in Fig. 2, Fig. 13 is a plan view showing some details of the movable rack shown in Fig. 2, and Fig. 14 is a plan view showing the pickup mechanism shown in Fig. 2. FIGS. 15(a) and 15(b) are a plan view and a sectional view showing some details of FIG. 14, respectively. 17... Boxwood part, 172... Guide part, 173.17
4... Roller, 211... Rotating shaft, 281... Rotating shaft, 175... Mounting part, 31... Lock groove, 3
12...Sliding contact portion, 301...First locking groove, 302
...Second locking groove, 341...Fitting part, 178...
・Support stand, 201... Through hole, 202... Guide groove, 3
51...Protrusion, 352...Through hole, 2 (13,204
... recess, 353.354 ... recess, 371...
Guide groove portion, 381.382...Guide bin, 391.3
92... Guide hole, 393... First tooth portion, 394...
...'2nd tooth portion, 395... Movable part, 396...
Bin, 355... Bin, 411... Lock Bin, 2
82... Protrusion, 451... Extension part, 179... Recessed part, 481... Engagement part, 501... Through hole, 521,
522... Guide support part, 581... Rotating shaft, 591
... Guide roller, 592 ... Guide protrusion. Applicant's Representative Patent Attorney Takehiko Suzue Figure 7 Figure 8 Figure 10-425- Figure 11 J! =14 III 1s figure fuco 427- (b)

Claims (1)

[Claims] In an optical disc record playback device that includes a disc loading mechanism that horizontally loads an optical disc, the disc loading mechanism includes a tray body that is provided horizontally so that it can be freely moved in and out; It is rotatably supported so as to be vertically movable according to the requirements, and has a rotary tray for placing the optical disk, and a guide for attaching and removing the optical disk to and from the tray body and the rotary tray, respectively. 1. An optical disc record playback device, characterized in that a pair of recesses are formed at positions that match at least when the tray body is in an extended state.