JPS59135669A - Optical disk record reproducing device - Google Patents

Abstract

PURPOSE:To attain the titled device capable of sure driving with a simple constitution by using one end of a support section of a chassis supporting a pickup as a rail for carrying the pickup. CONSTITUTION:A fitting body 50 being a sub-chassis of plate shape is screwed to a through-hole 177 by a screw 51 in a prescribed angle to the loading direction in the fitting constituting body 17 being a main chassis. A rectangular through-hole 501 for guiding a pickup is formed to the fitting body 50 and the pickup 32 is provided to the through-hole 501 via a pickup fitting base 52. Then, since the said rotating disk 35 is turned at the end of disk loading, the pickup 32 is provided to be movable freely in arrows C, D with a prescribed angle in the loading direction corresponding to the through-hole 352 for laser irradiation of the rotating disk 35. The pickup 32 irradiates the laser beam to the disk 33 and receives the reflected light in the process of movement, and is moved linearly in a prescribed speed from the inner circumference to the outer circumference of the disk 33 along the through-hole 501 by the pickup drive mechanism in, e.g., in a reproducing state.

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, in order to achieve as high fidelity as possible, a digital recording and reproducing system using PCM (4th code modulation) technology has emerged [7 and is becoming popular. First, this is what is called digital audio, and the principle is to make the audio characteristics independent of the characteristics of the recording medium and far superior to the conventional analog system. This is because it has been established. In this case, a system that uses a disk as a recording medium is called a DAD system, and optical, electrostatic, and mechanical playback methods are known. Regardless of which of these playback methods is adopted, the playback device that embodies it must be capable of satisfying various advanced functions and performances not found in conventional methods. be done.

For example, in an optical disc record playback device using the CD (compact disc) method among optical playback methods, pits (irregularities with different reflectances) corresponding to digitized (PCM) data are formed on a transparent resin disk. The metal thin film to be formed is coated with a diameter of 12 cm and a thickness of 1.
．． A 2-hour optical disc was heated at approximately 200 to 500 r, p using the Ct, V (constant linear velocity) method. Drive at variable rotation speed of □. In this case, the disc has a track pitch of 1.6 μm, and because it stores a huge amount of information that can be played in stereo for about an hour on one side, it is equipped with various advanced functions and performance. It is easy to understand what you need.

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 amount of electricity generated.

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 case of the conventional type, an optical disk can be easily attached and detached, and a structure that is as simple as possible and can be used with 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]

This invention was made in view of the above points, and an object of the present invention is to provide an improved optical disc record playback device that has a disc playback mechanism that is as simple as possible and can be reliably driven. There is.

[Summary of the invention]

That is, in the optical disc record playback device according to the present invention, which is provided with a pickup feeding mechanism capable of transporting a reproducing pickup in the radial direction of the optical disc, the pickup feeding mechanism moves the pickup in the radial direction of the optical disc. The present invention is characterized in that it has a chassis that is supported at both ends in a direction substantially perpendicular to the pickup direction, and that one end of the support portion of the chassis is used as a rail for transporting the pickup.

[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. A DAD (hereinafter referred to as disk) loading mechanism section 12 is mounted on the front panel of this cabinet 11.
The arrow (A) is linked to the operation of the LOADING ) key 13.
), (B) The disc is installed in a so-called horizontal loading type that can be moved in and out in the directions, and the disc is placed horizontally on the tray part and then horizontally loaded and loaded into the drive position 5- for playback. 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, Backward key (BWD) for backward operation, Pause key (PAUSE), Repeat key (REPEAT)
), and an operating section 16 is arranged in parallel with the loading key 13.

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 6- 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 (A) and (B).

In other words, as shown in FIG. 5, this mounting structure 17 has a pair of ribs 171, 171 formed at both ends thereof for installing the cabinet 1 (see No. 11), and
A substantially concave guide portion 172 is formed at the tip of the upper surface. A pair of guide rollers 173 and 174 are provided inside each side of the guide portion 172VCId, and a loading drive motor 2 is provided near one end of the bottom surface thereof. This motor 2 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 noah.

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 3 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.

The locking member 31 has a spring (not shown in FIG. 5 for convenience) between its base end and the mounting portion 175.
is engaged and 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. The through hole 177 has a fitting part 341f through which the key money of the pickup 32 and the optical disk 33 (shown by the dotted chain line in FIG. 2) is inserted, and the pickup (feed) including the turntable 34, etc.
A disc playback mechanism section 19, which will be described later and which integrates a drive mechanism and a disc drive mechanism, moves in the loading direction (arrow (A)
) and (13) direction), and are arranged as a unit on a mounting body 50 that becomes a sub-chassis in a state having a predetermined angle with respect to (13) direction).

Further, the mounting structure 17 has the mounting portion 1 on the upper surface thereof.
A pair of support stands 178, 178 for supporting the clamper lever are erected at both ends corresponding to 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 is disposed on the mounting structure 17, on which the disk 33, indicated by the two-dot chain line in the figure, is mounted. A through hole 201 corresponding to the disk 33 is formed approximately in the center of the tray body 20, and a plurality of guide grooves 202 are formed at predetermined intervals on the inner peripheral wall of the through hole 201.
(Only one location is shown in FIG. 4 for convenience of illustration) are formed to be inclined downward. A rotating tray 35 on which the disk 33 is placed is installed in the through hole 201. This rotating tray 35 has the above-mentioned through holes 2 in its peripheral portion.
A plurality of protrusions 351 corresponding to the plurality of guide grooves 202 of 01
(For convenience of illustration, only one location is shown in FIG. 4) are formed at predetermined intervals, and the plurality of protrusions 351 are guided by the plurality of guide grooves 202 with respect to the tray main body 20 as shown in the figure. It can be rotated clockwise and counterclockwise, and can be moved up and down.

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 periphery. 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 203, which correspond to the disk attachment/detachment guide portion.
204, 353, and 354 are formed at positions that match 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 recesses 353 and 354 of the rotary tray 35 are formed as shown in FIG. As shown, the recess 353 of the tray main body 20.
354, 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 have guide groove portions 3, respectively.
61 (for convenience of illustration, the guide member 37 is not shown) are formed corresponding to each guide roller 173, 174 of the guide portion 172 of the mounting structure 17. For this reason, the tray main body 20 has guide groove portions 361 of its guide members 36 and 37, and guide portions 172 of the mounting structure 17.
are engaged and guided by the rollers 173 and 174 of
It is movable in the 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 fixing groove 38 is connected to the tray main body 2.
0, corresponding to the third reduction gear 25 of the mounting structure 17, and guide pins 381 and 3112 are protruded from the upper surface thereof at predetermined intervals.

Meanwhile, guide holes 391 and 392 are formed in the movable rack 39 disposed on the upper surface of the fixed rack 38, and guide bins 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. Further, a movable portion 395 is formed at the tip of the movable rack 39 to protrude inward, and a bin 396 is formed at the tip of the movable portion 395. One end of a driving member 40 is rotatably supported by the bin 396, and the other end of the driving member 46 is rotatably supported by a bin 355 protruding from the rotating tray 35. .

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

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. The third degree is transmitted to the fourth and fifth reduction gears 23 to 27. At this time, the third reduction gear f, -2s engaged with the base end of the fixed rack 38 is rotationally driven in the counterclockwise direction in the figure, so that the tray main body 20 is positioned at the most position indicated by the arrow (B) as shown in FIG. direction 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. 14- The lock gear 28 meshes with the base end of the toothed portion 393 and the second toothed portion 394 of the movable rack 39 . Then, the movable rack 39 is moved to the position N shown in FIG. 8 by the fifth reduction gear 27. At this time, the movable portion 395 of the movable rack 39 is moved in the direction of arrow (B), so that the driving member 40 presses the bin 355 of the rotating tray 35. Therefore, the rotating 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 20. Here, the rotating tray 35
The through hole 352 for laser irradiation is in the feeding direction of the pickup 32 (the details will be described later), that is, the arrow (Q(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 fine cam 29 of the lock gear 28 presses the sliding contact portion 312 of the lock member 3 and
resists the biasing force of the spring 60 and rotates its rotation shaft 17.
It is rotated counterclockwise in the figure around 6f. Therefore, as shown in FIG. 11, the locking groove 311 of the locking member 31 locks the locking pin 411 of the locking protrusion 41 of the tray 20, and when the tray 20 is in the disk loading completed state, When locked, the protrusion 282 provided on the rotating shaft 281 turns off the switch 42 and stops the motor 21.

Further, as shown in FIG. 4, in order to take out the disc 33 with the disc 33 mounted on the turntable 34, when the loading key 13 is operated, the motor 21 is driven in reverse by a control circuit (not shown). be done. Therefore, the disc loading mechanism section 12 performs an operation substantially opposite to that when loading the disc 33f onto the turn tape A/34, and moves the tray main body 20 in the direction of arrow (A), and the disc shown in FIG. This is to reach the mounting position.

Here, a description will be given of the crank/mother mechanism 18 that presses and supports the disk 33 against the turntable 34 in a state in which disk loading has been completed as described above. That is, as shown in FIG. 2 again, the mounting structure 1
The mounting member 43 is supported in a connected state on the support stands 178 and 178 of No. 7. A shaft 44 is supported on the lower surface of the mounting member 43 at a substantially central portion thereof and substantially parallel to the mounting member 43, and a middle portion of a clamper lever 45 is rotatably supported on this shaft 44. be done. This clamper lever 45 has an extending portion 451 formed at its base end, and the extending portion 451 is connected to the mounting portion 17 of the mounting structure 11.
It is inserted into a position regulating recess 179 formed in 5. A clamper 17-@46, which is formed of a magnetic material and has a cylindrical shape with a bottom, is supported at the distal end of the clamper lever 45 with an appropriate amount of play, facing the turntable 34. A collar portion 461 is formed at the tip of the clamper portion 46 to lock the vicinity of the hole in the disk 33, and the magnetic force of the collar portion 461 allows the disk 33 to be inserted into the turntable 3.
It is fitted into the fitting portion 34 of No. 4.

In addition, the clamper lever 45 has a sedge ring 47 engaged between its tip and the mounting member 43.
The elastic force of the spring 47 urges the turntable 34 in a direction away from it.

t-A shaft 44 supported by the clamper lever 45
A substantially concave drive lever 48 is rotatably supported at both ends thereof. That is, as shown in FIG. 9, the drive lever 48 has the second eccentric cam 3 at its base end.
0 and selectively locks the first and second openings of the second eccentric cam 30 and the grooves 301 and 302f.
is formed. One end of a torsion spring 49 wound around the shaft 44 is engaged with the drive lever 48, and the other end of this torsion spring 49 is engaged with the base of the Clasono lever 45. There is. For this reason, the drive lever 48 and the clamper lever 45 are shown to be rotated together in conjunction with each other.

Here, cranno f-mechanism 1 configured as above
The operation of No. 8 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, the second eccentric cam 30 causes the engaging portion 48 of the drive lever 48 locked in the first lock groove 301 to slide into contact with the peripheral edge of the second eccentric cam 30 and move. As shown in FIG. 11, the second lock groove 30
Lock at 2. 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 of the shaft 281 as the second eccentric cam 30 rotates.
It is rotated counterclockwise in the figure around . 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 described above, since the rotating tray 35 of the tray body 20 is lowered while being rotated relative to the tray body 20, the clamper section 46 presses the disk 33 against the turntable 34 by its magnetic force. , here the turntable 34 of the disc 33
The installation is now complete.

i! Furthermore, when the disk loading mechanism is reversed as described above in the clamped state of the disk 33 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 clamping 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, a notched tooth portion 398 for preventing meshing and locking, which is formed by notching the tooth tips of two teeth at an acute angle as shown by diagonal lines in the figure from the base end thereof.

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 392, 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
The elasticity of the gear 97 prevents a locked state caused by the simultaneous meshing of the third and fifth reduction teeth 21 and wheels 25 and 27, and also prevents overload on the motor 21, promoting power saving measures. .

Furthermore, by forming the notched tooth portion 398 on the first tooth portion 393 of the movable rack 39, the transmission of the rotational force of the motor 210 is fixed to the third reduction gear 25 as described above.
38 to the fifth reduction gear 27 and the first movable gear 39.
This prevents an overload condition due to simultaneous meshing when shifting to the tooth portion 393 of the tooth portion 393, thereby facilitating smooth operation and promoting power saving measures.

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 substantially plate-shaped through hole 177. Mounting body 50 serving as a subchassis
is screwed in with a screw 51 via a damper at a predetermined angle with respect to the loading direction. A substantially rectangular through hole 501 for guiding the pickup is formed in this mounting body 50 22 - , and the pickup 32 is disposed in this through hole 501 via a pickup mounting base 52 . Here, the pickup 32 is lowered by rotating the rotary disk 35 (see figure M4) as described above when the disk loading is completed, so that the laser irradiation through hole 35 of the rotary disk 35 is rotated and lowered.
2, it is arranged at a predetermined angle with respect to the loading direction and is movable in the directions of arrows (C) and (D). During the movement of the pickup 32, the disk 33 is irradiated with a laser beam and its reflected light is received.
For example, in the playback state, the disc 33 is linearly moved from the inner circumference toward the outer circumference of the disk 33 at a predetermined speed along the through hole 501 by a big ara f (feed) drive mechanism to be described later.

Further, the turntable 34, which constitutes the entire disk drive mechanism, is rotatably disposed in the mounting body 50 near one side of the through hole 50.

This turntable 34 has a bearing 54o1- at its base end.
A turntable (not shown) is connected to the IJ motor shaft via the turntable, and is rotated to a predetermined state by the motor in conjunction with the operation of the operating section 16 (see FIG. 1).

Here, FIG. 14 shows a big alar f (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 in the guide support portions 521 and 522 at approximately the center thereof.
A guide rod 54 serving as a guide shaft and a drive shaft is inserted through the shaft 24 . 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 . Also,
The guide rod 54 has both ends connected to the guide holes 523 and 524.
After being inserted, they are rotatably supported by bearing portions 512 and 513 formed on the mounting body 50, respectively. and,
After one end of the guide rod 54 passes through one of the bearing parts 512 and 513, a transmission gear 56 is further provided coaxially with the transmission gear 56.
are engaged. The drive 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 50, and is configured to transmit the rotational force of the motor 58 to the transmission gear 56. ing.

On the other hand, at the other end of the pickup mount 52, there is formed a sandwiching part 59 that pinches and guides the vicinity of the periphery of the through hole 5.01 of the mounting body 50 as a rail. This sandwiching part 59 has a guide roller 591 at its upper end corresponding to the upper surface of the peripheral edge of the through hole 501, and a guide roller 591 at its lower end that corresponds to the upper surface of the peripheral edge of the through hole 501.
It has a guide protrusion 592 corresponding to the lower surface of the peripheral edge.

That is, in order to move the big gear f32 in the direction of arrow (C) in the pickup (feeding) 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 mount 52 is linearly driven in the direction of the arrow (C) as the gear 55 rotates. For this reason, the pickup mounting base 52 is guided by the guide support portions 521 and 522 through which the guide rod 54, which is the center of rotation of the gear 55 and the transmission gear 56, and the sandwiching portion 59 are inserted. (It is moved in the 0 direction.

Further, when moving the pickup 32 in the direction of arrow (D), the motor 58 is reversed to perform an operation substantially opposite to the movement in the direction of arrow (D) described above, and move in the direction of arrow (D). The explanation thereof will be omitted here for convenience.

Now, with the disc loading completed as described above, the gray key (see FIG. 1)'f- of the operating section 16 of the cabinet 11 is operated to stop the disc 33 from being played back.

Then, the turntable drive motor (not shown) is driven and the disc 3 mounted on the turntable 34 is driven.
3 to a predetermined state, and
A laser beam is irradiated from f32 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 by the pickup 32.

At this time, the pickup 32 detects the intensity and temporal length of the light and outputs an electrical signal corresponding to the intensity, from which a digitally encoded signal is recorded on the disk 33 and extracted. Then, the big roller f32 is moved from the inner circumference to the outer circumference of the disk 33 by the pickup feeding mechanism, and reproduction of the disk 33 is completed.

Here, when the loading key 13f is operated again, the disloading mechanism is reversed as described above, and the tray body 20 is moved to the position shown in FIGS. 4 and 3, and reaches the disc loading position shown in FIG. 2. In particular, the disk 33 can be attached and detached.

According to the optical disk record reproducing apparatus as described above, the sub-subs support the reproducing pickup 32 at both ends of the pickup 32 in a direction substantially orthogonal to the radial direction of the disk 330 in the direction of movement of the pickup 32. With respect to the mounting body 50 serving as a chassis, one end of the support portion of the mounting body 5θ directly forms a rail portion for transporting the pickup, so that the pickup (feed) drive mechanism and the disc playback mechanism section 19 can be easily connected. It has the advantage that it can be driven reliably with a relatively simple configuration.

In other words, the pickup (feed) drive mechanism is necessary to allow the pickup 32'fr to be freely transferred. At least one of the rails at both ends can omit a dedicated rail, and one end of the support part of the mounting body 50 can be connected directly to the rail. This is because the maintainability of the rail is improved by making it a rail.

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 described in detail above, according to the present invention, it is possible to provide an optical disc record reproducing apparatus that is improved so that the disc reproducing mechanism can be reliably driven with the simplest possible configuration.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an external appearance of an optical disk record reproducing apparatus according to an embodiment of the present invention, and FIG. 3 and 4 are respectively perspective views showing the operating state of FIG. 2, FIG. 5 is a perspective view showing a part of FIG. 2, and FIG. 7 and 8 are perspective views showing some details of FIGS. 2, 3, and 4, respectively, and FIGS. 9, 10, and 11 are perspective views of FIGS. 2, 3, and 4, respectively. 12(a) and 12(b) are plan views showing the operation of the clamper lever in FIG. 2, respectively, and FIG. 13 is a perspective view showing some other details of FIG. FIG. 14 is a plan view showing some details; FIG. 14 is a perspective view showing the pick-up mechanism shown in FIG. 2 taken out; FIG. 15(a) e
(b) is a plan view and a sectional view showing some details of FIG. 14, respectively. DESCRIPTION OF SYMBOLS 11... Cabinet, 12... Loading mechanism part, 13... Loading key, 14... Power key, 15... Display part, 16... Operation part, 17... Mounting structure, 18 . . . Clamper mechanism, 19 . . . Disc 30- playback mechanism section, 20 . Motor, 21...Rotating shaft, 22...
Drive gear, 23...first reduction gear, 24...second
reduction gear, 25... third reduction gear, 26... fourth reduction gear, 27... fifth reduction gear, 28...
Lock gear, 28...rotating shaft, 175, mounting portion, 29...first eccentric cam, 30...second eccentric cam, 3...lock member, 311... lock groove,
312...Sliding contact portion, 30...First locking groove, 30
2... Second locking groove, 176... Rotating shaft, 177...
...Through hole, 32...Pickup, 33...Optical disc, 34...Mating part, 34...Turntable, 178...Support stand, 201...Through hole, 202
... Guide groove, 35 ... Rotating tray, 351 ... Protrusion, 352 ... Through hole, 203, 204 ... Recess, 3
53,354...Four parts, 36.37...Guiding member,
371... Guide groove portion, 38... Fixed rack, 39...
・・Movable rack, 381.382 ・・Guide bin, 39
1.392... Guide hole, 393... First tooth portion, 3
94... Second tooth part, 395... Movable part, 396...
...Bin, 4o...Drive member, 355...Pin, 4
1 protrusion, 411... lock pin, 282 protrusion, 42
...Switch, 43...Mounting member, 44...Shaft,
45... Cranno 4-lever, 451... Extension part,
179... recess, 46... part of clamper, 461...
...Brim part, 47...Spring, 48...Drive lever, 481...Engagement part, 49...Torsion spring, 5o...Mounting body, 51...Screw, 52...
・Pickup mounting base, 5o1...through hole, 53...
Rack gear, 521, 522...Guide support portion, 54.
... Guide rod, 55 ... Worm gear, 512, 513
... bearing part, 56 ... transmission gear, 57 ... drive gear, 58 ... motor, 58 Nogawa rotation shaft, 59 ... sandwiching part, 59 ... guide roller, 592 ... ...Guide protrusion, 397... Notch, 398... Notch tooth, 60.
... Spring, 520... Support plate. Applicant's Representative Patent Attorney Takehiko Suzue Figure 7 Figure 8 Figure 10 Figure 11 Figure 94 II ls Figure 55' 547- (b)

Claims (1)

[Claims] In an optical disc record playback device comprising a pick and a knob feeding mechanism capable of transporting a pickup for playback in a radial direction of an optical disc, the pickup feeding mechanism is substantially perpendicular to the transport direction of the pickup 7''. 1. An optical disc record reproducing apparatus, comprising a chassis that is supported at both ends in a direction so as to be freely transportable, and one end of the supporting part of the chassis is used as a rail for transporting the pickup.