JPH0432459B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a recording disk reproducing apparatus that is capable of recording and reproducing various recording disks having different inner diameters with one device.

(Prior art) As shown in FIG. 16, the optical system in which the disc tray 2 is pulled out from the playback device main body 1, a disk is placed thereon, and when the disk tray 2 is put back into the playback device main body 1, the disc is loaded into a playable state. These disc playback devices are often found in the field of video discs and digital audio discs (hereinafter referred to as compact discs).

Recently, a single playback device has appeared that can play both video discs and compact discs.

Generally, such playback devices are capable of reading recording signals from both video discs and compact discs with a single pickup device.

During a playback operation, the disk is placed on a turntable of a spindle motor and rotates, and the pickup reads recorded signals from the bottom of the disk.

For this reason, the diameter of the turntable is set to be somewhat smaller than the innermost circumference of the signal recording range of the disk.

However, as shown in FIG. 20, compact discs and video discs differ significantly in outer diameter, center hole diameter, and signal recording range. 20th
Figures a and b are video discs, and Figure 20c is a compact disc. In practice, it is difficult to design a turntable that can accommodate either of these discs, and turntables dedicated to compact discs and video discs are often used, respectively.

As a conventional recording disk reproducing device, there is one shown in FIGS. 16 to 19. 3 and 4 in FIG. 17 are a spindle motor and a turntable for mounting and rotating a video disk. 7 is a pickup device for signal reading. When playing a video disc, the pick-up 7 plays back signals recorded over a wide range as shown in Fig. 20a, so the range of movement of the pick-up 7 is wide. They are in horizontal positions as shown at 5' and 6' in FIG. 17, so that the pickup 7 can be moved from the innermost signal recording position to the outermost position on the video disc without any hindrance.

To load a video disc into a reproducing apparatus, the disc tray 2 is pulled out as shown in FIG. 19a, the disc is placed thereon, and the disc tray 2 is housed in the reproducing apparatus as shown in FIG. 19b. In this state, the playback device detects whether the type of disc placed on the disc tray 2 is a video disc or a compact disc, and the position of the spindle motor for the compact disc is 5, 6 or 5', 6' as shown in Fig. 17. The system determines which position it should be in and executes the switching.

In the case of a video disc, the postures of the spindle motors for compact discs are 5' and 6', the disc tray 2 is lowered as shown in Figure 19c, and the video disc is placed on the turntable 4 for video discs. It will be posted on. Simultaneously with the movement of the disk tray 2 being lowered, the disk clamper 8 for the video disk is also lowered to clamp the video disk between the turntable 4 and the disk clamper 8.

Next, to load a compact disc into the playback device, once the compact disc is placed on the disc tray 2 and stored in the playback device, the spindle motor 5 for the compact disc is placed behind the spindle motor 3 for the video disc. Because of this position, the compact disc must be moved from the center of the disc tray 2 to the rear.

Therefore, the disk tray 2 is
As shown in the figure, the part on which the compact disc is placed is separated from the main body of the disc tray 2. Therefore, when the disc tray 2 is stored in the playback device as shown in FIG. 18, this divided portion is moved rearward to align the axial center positions of the compact disc and the spindle motor 5 for the compact disc. That's what I do.

That is, when the compact disk is placed on the disk tray 2 and the disk tray 2 is stored as shown in FIG. 19(d), the compact disk is moved rearward as shown in FIG. 19(e).

When it is detected that a compact disc has entered the playback device, the attitude of the spindle motor 5 is switched from the horizontal position to the upright position.

Next, as shown in FIG. 19f, the disk tray 2 and the disk clamper 9 are lowered, and the compact disk is held between the turntable 6 and the disk clamper 9, and the loading is completed.

There is an opening in the front of the player for the disk tray 2 to enter and leave the player. When the disk tray is stored in the playback device and lowered, this opening is opened as shown in Fig. 19c so as not to spoil the appearance of the device.
It is closed with a shutter 19 as shown in FIGS.

In this way, it is possible to load both video discs and compact discs, which have vastly different shapes, with a single playback device, and to play freely on either.

However, according to such a playback device, the disc tray 2 has a structure that is divided into a video disc and a compact disc, and when the disc tray is stored in the playback device, this divided portion must be slid a predetermined distance. As a result, the structure of the disk tray 2 becomes complicated.

In addition, after the disc tray 2 is stored in the playback device, the disc tray 2 must be lowered in order to place the disc on the turntable 4 or 6, and the large disc tray 2 must be lowered and raised while being kept horizontally. The problem was that the mechanism for doing so was large and complicated.

Further, when the disk tray 2 is lowered, it is necessary to provide a shutter 19 to cover the opening through which the disk tray comes in and out at the front of the apparatus, which is complicated in mechanism and disadvantageous in terms of cost.

Furthermore, a disk clamper is required for one for a video disk and one for a compact disk, and each must be moved up and down separately according to the type of disk, which makes the mechanism complicated and disadvantageous in terms of cost.

(Problems to be Solved by the Invention) As described above, in the conventional recording disk reproducing apparatus, the disk tray has a complicated structure and must be moved up and down horizontally. Further, a plurality of disc clampers are required depending on the type of recording disc, and must be moved up and down. Furthermore, a shutter mechanism was required for the entrance and exit of the disk tray, resulting in a complex structure and a large number of parts.

The present invention has been made in view of the above points, and an object of the present invention is to provide a recording disk reproducing apparatus having a simple structure and a small number of parts.

[Structure of the invention]

(Means for Solving the Problems) In the recording disc reproducing apparatus of the present invention, a turntable corresponding to recording discs with different inner diameters is selected, a bracket on which this turntable is mounted is moved, and a The recorder is moved up and down to hold the recording disc between the turntable and the disc clamper.

(Function) In the device configured as described above, the disk tray is not divided, and only slides and does not move up and down. Further, a disk clamper that can be used for various recording disks is provided, and the recording disk can be held between the disk clamper and the turntable by simply rotating the bracket on which the turntable is mounted within a small angle range. With such a simple configuration, a recording disk reproducing device with a small number of parts can be obtained.

(Embodiment) A recording disk reproducing apparatus of the present invention will be described below with reference to the drawings.

FIGS. 1 and 2 are exploded perspective views of the recording disk reproducing apparatus of the present invention. 10 in FIG. 2 is a disk tray. The disk tray 10 has a step 1 that guides the outer periphery of the disk so that the center of the disk can be placed at a predetermined position.
1, 12, and 13 are provided. Figure 20a,
Various disk shapes are shown in b and c.
Positioning is performed in steps 2 and 13.

Grooves 14 and 15 are provided on both sides of the disc tray 10 so that the disc tray 10 can slide while being horizontally supported when entering and leaving the main body of the playback apparatus.

FIG. 1 is an exploded perspective view showing an outline of the structure of a mechanism of a recording disk reproducing apparatus according to the present invention. In FIG. 1, illustration of the disk tray 10 in FIG. 2 is omitted to make the description of the components easier to understand.

In FIG. 1, spindle motors 23 and 24 for video discs and compact discs are connected to the main chassis 20 by brackets 21 and 22.
installed on. 25 and 26 are turntables for video discs and compact discs, and 27 and 28 are center spindles.

As for the brackets 21 and 22 to which the spindle motors 23 and 24 are attached, the rod 19 is attached to the bracket 2.
The rod attachment hole 32 of the main chassis 20 passes through the holes 30a, 30b, 31a, 31b of 1 and 22.
a, 32b, so that the brackets 21, 22 can rotate around this rod 29. It is also designed to be able to slide in the axial direction of the rod 29.

The brackets 21 and 22 are provided with rollers 33 and 34 as shown. There is a roller receiver 35 that supports the rollers 33 and 34.

By raising and lowering the roller 33 or 34, the bracket 21 or 22 is rotated about the rod 29, thereby raising and lowering the spindle motor 23 or 24. A mechanism for this purpose is built into the roller receiver 35. There is.

That is, 36 is an elevating arm for elevating and lowering the rollers 33 and 34, and a hole 38 of the elevating arm 36 engages with a pin 37 set in the roller receiver 35, so that it can rotate about the pin 37 as a pivot. ing.

An elevating cam 40 is slidably attached to the roller receiver 35 through pins 39a, 39b and elongated holes 41a, 41b formed in the elevating cam 40. The lifting cam 40 is provided with a cam slope 42 and is in contact with the cylinder 43 of the lifting arm 36.

When the lifting arm 36 rotates, a bent portion 44 provided at the tip of the lifting arm 36 lifts or lowers the roller 33 or 34 of the bracket 21 or 22.

Pickup 4 to read recorded signals from disk
5 is attached to a carriage 46 for movement in the radial direction of the disk (in the y-axis direction in FIG. 1). The carriage 46 has two guide rails 47, 4.
8 is designed to slide.

The carriage 46 is provided with a rack gear 49, which is driven by a pinion gear 50.

The pinion gear 50 is a reduction gear 51a, 51
It is designed to be driven by the worm gear 53 of the feed drive motor 52 of the pickup 45 via pins b and 51c.

The ends of the guide rails 47 and 48 on the inner peripheral side of the disk are connected to elongated holes 54 and 55 provided in the main chassis 20.
It is fitted into the body and can move a certain distance in the vertical direction (Z-axis direction).

A disk clamper 56 that functions to hold down the disk from above is provided above the position near the center of the main chassis 20 where the disk is loaded, and the disk clamper 56 is rotatably suspended from a clamper support plate 57.

The clamper support plate 57 has left and right ends fixed to the main chassis 20.

The spindle motors 23 and 24 for video discs and compact discs must be selected depending on the type of disc when loading the disc, and must be moved to the position where the disc is loaded. The selective movement means for this purpose is the motor switching arm 58 and the main chassis 20.
It is rotatably attached to with a pin 59.

In order to rotate the motor switching arm 58, a crank arm 60 is designed to rotate around a shaft 61. A pin 62 is installed at the tip of the crank arm 60, and a long hole 63 of the motor switching arm 58 is connected to the crank arm 60. is engaged in.

Therefore, when the crank arm 60 rotates, the motor switching arm 58 rotates by a predetermined angle about the pin 59 as a fulcrum.

The motor switching arm 58 connects the bracket 21,
It is designed to move 22.

The pin 65 at the tip of the connecting plate 64 is connected to the bracket 2.
It engages with the elongated holes 66 and 67 of Nos. 1 and 22.

The disk tray 10 shown in FIG. 2 is moved in and out in the y-axis direction in FIG. 1, and tray guide rollers 68a and 68b for this purpose are provided inside the main chassis 20. (A tray guide roller is also provided inside the side surface of the main chassis 20 opposite to this.) There is a rack 69 which functions to transport the disk tray 10 by a motor drive and to raise and lower the spindle motors 23 and 24.

The rack 69 has long holes 70 and 71 and is supported by guide pins 72 and 73 so that it can move in the y-axis direction.

The rack 69 can be moved by a pinion gear 74 from the drive motor via a speed reduction belt and gears.

A bridge portion 79 between elongated holes 70 and 71 of the rack 69 can engage with a notch 76 of a lifting lever 75 for raising and lowering the spindle motors 23, 24. In a predetermined section of the operating stroke of the rack 69, the bridge portion 79 and the notch portion 76 engage with each other, so that the movement of the rack 69 is transmitted to the lifting lever 75.

The lift lever 75 is supported by a support pin 75' and rotates around this support pin 75'.

The elevating lever 75 is provided with a long hole 77, which engages with a pin 78 set on the elevating cam 40. As a result, the movement of the lift lever 75 is converted into a sliding movement of the lift cam 40 in the x-axis direction,
The spindle motors 23 and 24 are arranged to move up and down.

3, 4, and 5 show the configurations of some mechanisms whose descriptions are omitted in FIG. 1 due to the complexity of the diagram.

The crank arm 60, which functions to switch the spindle motors for compact discs and video discs by moving them to the position where the disc is loaded, connects a switching drive motor 81 to a worm gear 82 to a worm wheel 83, as shown in FIG. , the small gear 84, the large gear 85, etc., and the rotational motion is transmitted to the spindle motor 2.
3 and 24 positions are switched.

When loading a disk, the spindle motors 23 and 24 rise from below the disk and lift the disk from the disk tray 10. I try to lift the edges slightly. As shown in FIG.
4 and 55, but this guide rail 4
The front ends of 7 and 48 are further connected to the holes 8 of the rail support plate 86.
7 and 88. And rail support plate 8
6 is engaged with notches 89 and 90 of the main chassis 20, and is configured to be able to slide in the z-axis direction. Further, a leaf spring 91 is attached to the rail support plate 86 as shown in FIG.

Brackets 21 and 22 in FIG. 1 have leaf springs 91 on rail support plate 86 when they are raised.
protrusions 93, 94, 95, which abut the left and right ends 92a, 92b and push them up;
96 are provided.

When the protrusions 93, 94 or 95, 96 push up the leaf spring 91, the pick-up 45
The front ends of the guide rails 47, 48 are pressed against the upper ends of the elongated holes 54, 55 of the main chassis 20, so that the pick-up 45 is reliably positioned in the z-axis direction.

The disk tray 10 is taken in and taken out from the main body of the playback apparatus, but as shown in FIG.
The remaining S-s sections are manually loaded and unloaded.

Therefore, when the disk tray 10 and the rack 69 move together, and when the disk tray 10 is disengaged from the rack 69, the disk tray 10 moves as a unit.
There are two states, one manually moved by 0.

For this reason, mechanisms for coupling and disengaging the disk tray 10 and the rack 69 are provided on the disk tray 10 side and the rack 69 side. These will be explained with reference to FIGS. 2 and 5.

106 in Fig. 2 is a roller arm, and the supporting metal fitting 1
07 is attached to the lower surface of the disk tray 10.

One end 108 of the roller arm 106 is formed into a roller (or cylindrical shape). And the other end is
It is engaged with the support fitting 107 by a pin 109 parallel to the x-axis, and is rotatable about the pin 109.

FIG. 5 shows a counterpart mechanism related to this. The rack 69 in FIG.
is engaged with. The pins 72 and 73 are mounted on a bracket 97 fixed to the main chassis 20.

The bracket 97 includes the aforementioned disk tray 1.
A roller holder 98 is provided which functions to guide and hold the roller 108 of 0.

The bracket 97 is provided with an elongated hole 99 to prevent the elevating lever 75 shown in FIG. 1 from interfering with the bracket 97.

In FIG. 5, the rack 69 is driven by a pinion 74, and the pinion 74 is decelerated by the drive motor 105 by gears 100, 101, pulleys 102, 103, belt 104, etc., and rotational force is transmitted thereto. It is becoming more and more popular.

The operation of the recording disk reproducing apparatus of the present invention having the above-mentioned structure will be explained below.

(1) Loading the disk As shown in Figure 6a, pull out the disk tray 10 and place the disk 200 on the disk tray 10.
Push in.

Assuming that the stroke for loading and unloading the disk tray 10 is S, if the disk tray 10 is manually moved in the section S-s, then the disk tray 10 is automatically transported by motor drive in the remaining section s.

As shown in FIG. 7a, the disk tray 10
When the roller 108 is pushed to near position A, the position of the disk tray 10 is detected by a sensor (not shown), etc., and the rack drive motor 1 is activated.
05 (Fig. 5), and the rack 69 begins to move as shown in Fig. 7b. At this time, disk tray 1
As shown in FIG. 7b, the roller 108 of the rack 0 is sandwiched between the roller guide 110 and the recess 111 of the rack, and cannot escape from the recess 111.
9 will be moved in one direction.

Then, the roller 108 falls into the recess 112 of the roller guide 110 shown in FIG.
Go forward a little by 9.

The position of the roller 108 at this time is such that the disk tray 10 is completely housed in the main body of the playback apparatus.

(2) Switching operation of the turntable When the position of the rack 69 is detected by a sensor, a micro switch (not shown), etc. in the state shown in FIG. 7c, the rack driving motor 105 is temporarily stopped.

Then, the playback device uses a sensor (not shown) to determine the type of disk based on the difference in diameter of the disks placed on the disk tray 10, etc., and a spindle motor 23 or 24 suitable for rotating the disk is activated to rotate the disk. The switching operation of the bracket 21 or 22 is performed so that the bracket 21 or 22 is positioned at the center.

That is, the switching drive motor 81 shown in FIG. 3 is activated, rotation is transmitted to the large gear 85, and the crank arm 60 engaged with the large gear 85 rotates. Then, the motor switching arm 58 shown in FIG. 1 swings into the state shown in FIGS. 8 and 9. As a result, the brackets 21 and 22, to which the spindle motors 23 and 24 for the video disk and compact disk are attached, are guided by the rod 29 and slide in the x-axis direction. A switching operation is performed in this state. Then proceed to the next step.

Of course, if the type of the disk placed on the disk tray 10 matches the type of the spindle motor located at the center of the disk, there is no need to switch the spindle motors 23 and 24, and the next step is performed as is. Let's move on to the next step.

(3) Lifting operation of the turntable When the selection of the spindle motor 23 or 24 corresponding to the type of disk is completed in the state shown in Fig. 6a, the 6th
As shown in FIG. b, the spindle motor 23 or 24 moves up to lift the disk from the disk tray 10, float it, and press it against the disk clamper 56. At the same time, the rail support plate 86 shown in FIG.
Push the guide rails 47 and 48 upwards through the elongated holes 54 and 48 of the main chassis 20 for receiving the guide rails.
Press it against the top of 55.

In this way, the pickup 45 is also lifted and the disk is loaded so that its relative height to the disk being lifted by the spindle motor 23 or 24 is maintained at a specified height.

The lifting operation of these spindle motors 23 or 24 will be explained using FIG. 1 and FIGS. 10 to 14.

The back side of the roller receiver 35 shown in FIG. 1 has a shape as shown in FIG. 10. When the spindle motor 23 or 24 for a video disc or compact disc is moved to the center position of the disc, the brackets 21 and 22 are guided by the rod 29 and slide in the x-axis direction. 34 is guided in the x-axis direction by the rail portion 113 of the roller receiver 35. The roller receiver 35 is provided with holding pieces 114a and 114b that hold the rollers 33 and 34 so that the brackets 21 and 22 do not move unnecessarily in the z-axis direction. Further, the roller receiver 35 is provided with a bracket 21 so that when the spindle motor 23 or 24 that has been selected and moved to the center according to the type of disk is raised, the spindle motor 23 or 24 is accurately positioned in the x-axis direction. , 22 rollers 33 or 34 with positioning guides 115a, 11
I try to hold it at 5b.

The spindle motor 23 or 24 is driven up and down by a motor 105 for driving the conveyance of the disk tray 10.
(See Fig. 5), but Fig. 7 a~
In operation c, the disk tray 10 is housed in the main body of the playback apparatus, the selection of the spindle motor 23 or 24 is switched, and then the spindle motor 23 or 24 is moved up and down.

Disk tray 1 by operating from c to d in Figure 7.
0 is kept stored in the playback device and is racked 69
Only those who are moved.

As a result, as shown in FIG. 13, the elevating lever 75 is rotated by the bridge portion 79 of the elongated holes 70, 71 of the rack 69 from the state shown by the two-dot chain line to the state shown by the solid line.

The rotation of the elevating lever 75 moves the pin 78 of the elevating cam 40 by a stroke L shown in FIG. When the elevating cam 40 is moved as shown in FIGS. 11 and 12, the cylinder 43 of the elevating arm 36 is pushed up by the cam slope 42, and the elevating arm 36 rotates about the pin 37, as shown in FIG. b
Move like. The bent portion 44 at the tip of the lifting arm 36 lifts the roller 33 at the tip of the bracket 21 or 22.

As a result of this operation, the bracket 21 or 22 is lifted by the movement of the rack 69, and the spindle motor 23 or 24 and turntable 25 or 26 are lifted. And at the same time, the first
According to the configuration shown in the figure, when the bracket 21 or 22 is raised, the front ends of the guide rails 47, 48 are lifted and the pick-up 45 is also raised.

In this way, the disk and the pick-up 45 are lifted as shown in FIG.
The disk is placed between the turntables 25 or 26 and becomes rotatable, and the disk is loaded.

(4) Disk unloading operation To play back information, rotate the disk at a predetermined speed and move the pick-up 45 onto the guide rail 4.
This is done by driving the feed drive motor 52 along lines 7 and 48. To take out the disc after playback is complete, the reverse operation of loading the disc is performed. The position of the rack 69 is driven from the position d in FIG. 7 to the position c.

As a result, the state changes from FIG.
It is supported by the rail portion 113 of the roller receiver 35 shown in the figure.

The pick-up 45 is also raised by a small amount of height during loading, but as the bracket 21 or 22 is lowered, the pick-up 45 is also lowered and returns to the state shown in FIG. 6a.

This will cause the disk to revert to disk tray 10.
Return to the state on top of. and Figure 7 c to a
The rack 69 is driven to the state shown in FIG. The disk tray 10 is then pulled out by motor drive to the position s. From this state, the disk tray can be manually pulled out to the S position to take out the disk.

After taking out the disc, when the disc tray is manually pushed to position s, the rack 69 is driven to the states shown in FIGS. 7a to 7c, and the disc tray 10 is stored in the playback device.

The stroke for inserting and removing the disk tray is the 6th stroke.
One method is to use a motor drive for only the s section of S in the figure and manually move the remaining S-s section, but another method is to use a motor drive for the entire stroke S.

In this case, as shown in FIG. 15, an independent drive motor 120 is provided to drive the spindle motor up and down, rather than being used also as a motor for conveying the disk tray. Then, the elevating cam 40 is decelerated by the worm 121, worm wheel 122, pinion gear 123, etc.
The rack 124 provided in the rack 124 is driven. This eliminates the need to manually open and close the disk tray 10, further improving operability. Since the rack 69 for conveying the disk tray 10 can be integrally constructed with the disk tray 10, the number of mechanisms related to disk tray conveyance can be greatly reduced as follows.

Specifically, what is reduced is the roller arm 106 provided on the disk tray 10 in FIG.
Supporting metal fittings 107, rollers 108, pins 109, pins 72 and 7 supporting rack 69 in FIG.
3, the bracket 97, the roller holder 98, the lifting lever 75 shown in FIG. 13, the support pin 75', the pin 78, etc.

〔Effect of the invention〕

As described in detail above, according to the recording disk reproducing apparatus of the present invention, the two sets of elevating mechanisms for elevating and lowering the disk tray and disk clamper are reduced to one set of mechanisms for elevating and lowering the bracket. In addition, one disk clamper can be used for a variety of recording disks, and since the disk tray is a loading method that does not lower, the front of the disk tray can also function as a shutter for the disk tray entrance and exit, reducing the number of parts. It also improves productivity and reliability.

[Brief explanation of drawings]

FIG. 1 is a structural exploded perspective view of a recording disk reproducing apparatus of the present invention, FIG. 2 is an external perspective view of a disk tray of the present invention, and FIGS. 3 to 5 are partial structural exploded perspective views of the present invention. , FIG. 6 is a sectional view according to the present invention, FIG. 7 is a side view and rear view for explaining the partial operation of the present invention, FIGS. 8 and 9 are structural perspective views according to the present invention, and FIG. 10 11 and 12 are partial top and rear views of the present invention, and FIGS. 13 and 14 are partial top and side views of the present invention, FIG. 15 is a partial rear view of another embodiment of the present invention, FIG. 16 is an external perspective view of a conventional device and a device according to the present invention, and FIGS. 17 and 18 are partial perspective views of a conventional device. 19 is a side view for explaining the operating principle of a conventional recording disk reproducing apparatus, and FIG. 20 is a diagram comparing the shapes of disks of various formats. DESCRIPTION OF SYMBOLS 10... Disk tray, 20... Main chassis, 21, 22... Bracket, 23, 24... Spindle motor, 25, 26... Turntable, 2
9... Rod, 36... Lifting arm, 40... Lifting cam, 45... Pickup, 47, 48... Guide rail, 56... Disk clamper, 58... Motor switching arm, 81... Switching drive motor.

Claims (1)

[Scope of Claims] 1. A main chassis, a plurality of brackets that are supported so as to be movable up and down with respect to the main chassis, a plurality of turntables that are placed on these brackets and each rotated by a motor and have different diameters; a disk tray on which a plurality of different recording disks can be placed and conveys the recording disk to a position that coincides with the center of rotation of the turntable; and a disk clamper rotatably attached to a clamper support plate fixed to the main chassis. and movement selection means for selecting the turntable corresponding to the inner diameter of the recording disk placed on the disk tray and moving the turntable to a position facing the disk clamper, and moving the turntable to a position facing the disk clamper. 1. A recording disk reproducing apparatus characterized by comprising an elevating means for elevating and lowering said bracket in order to sandwich said recording disk between said bracket and a table.