JPS63167465A - Both-face playing disk player - Google Patents

Abstract

PURPOSE:To miniaturize a disk player, by inverting a rotary frame on which a spindle, a clamper, and a pickup are loaded while a disk is carried out to a carry-in position. CONSTITUTION:When the playing of a plane A is completed, a tray 10 is ascended after the clamper 4 is ascended off the disk 8, and arrives at a position where the disk 8 is loaded first according to the movement of a rack 9 in a direction of carrying out. Next, when a spindle motor 3 changes places with the clamper 4 by rotating the rotary frame 38 at 180 deg., the rack 9 is moved in a direction of carrying in, and the tray 10 is decended and carried in to the rearmost position, and the clamper 4 is set on the disk 8 and the spindle motor 3, then, the reproduction of a plane B is performed by the rotation of the spindle motor 3 and the operation of a pickup.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to so-called compact discs for audio recording, so-called digital signals recorded on both sides of analog signals, optical discs for video recording, and other computers. The present invention relates to an improvement in a double-sided disc player for reproducing signals recorded on both sides of a disc, such as a disc.

[Conventional technology]

Generally, the recording time for one side of video laser discs currently in use is about 60 minutes.

Therefore, in order to record a movie or the like lasting 60 minutes or more, it is often recorded continuously on the front side (side A) and the back side (side B).

Furthermore, in the format of high-definition television that is expected to be used in the future, the information density within a unit time will increase, so the recording time for one side will be shortened.

Against this background, it is thought that demand for double-sided disc players will increase in the future.

Currently, proposed double-sided performance devices include those that are equipped with two pickups for the front side and the B side, or equipped with a reversing device that flips the disc while holding the disc. There is a pickup reversal type as shown in FIGS. 14 and 15 and disclosed in Japanese Utility Model Application Publication No. 114558/1983.

This pickup reversal type, as shown in Figure 14, plays back the B side of the disc by moving the pickup by more than half the diameter of the disc and then reversing the pickup as shown by the two-dot chain line in the diagram. It is.

[Problem that the invention seeks to solve]

In the pickup reversal type mentioned above, if the standard size of the video disc is 30 cm, the pickup travel distance alone is 15 cm, resulting in a total length of more than 45 cm, which is suitable for consumer use such as general stereo playback equipment. The standard dimensions of the equipment will no longer fit.

Furthermore, a device equipped with two pickups requires an extra pickup and a switching circuit, which increases the cost by at least that amount.

Furthermore, in both of these methods, if the A side and B side are bonded together like a laser disc,
If a deviation of e as shown in FIG. 15 occurs during bonding, eccentricity will increase during B-side reproduction.

On the other hand, the method of inverting the disk while holding it requires a space equal to at least the diameter of the disk, and therefore, although it can be used in large devices, it is impossible to downsize it as a general consumer device.

[Purpose of the invention]

The present invention is aimed at solving the above-mentioned drawbacks of conventional double-sided disc players, and is designed to reduce the size of a disc transport type player by making it approximately the same size as a non-double-sided disc player. To provide a double-sided performance disc player which allows the user to perform the following functions, and which does not significantly increase the cost as compared to the case where two pickups are used.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention transports the disc to the standby position by means of a transport means for transporting the disc from the standby position to the performance position, rotates the disc during that time, and reads the signal with a pickup. The gist is to reverse the rotating frame, return the disc to the playing position by means of a conveying means, and play the opposite side of the disc.

[Embodiments of the invention]

An example of implementing the invention will be described below with reference to FIGS. 1-9.

In FIG. 1, ▪ is a chassis, side guides 7 are fixed on both left and right sides thereof, and an opening 1a is provided approximately in the center for rotation of a rotating frame 38, which will be described later.

In addition, a disc guide 16 is attached to the chassis 1 at a position approximately equal to the maximum outer diameter of the disc 8 to be played, and a gear shaft 19a equipped with synchronizing gears 19 on the left and right sides meshing with a rack 9, which will be described later, is supported. A gear 24 that meshes with and rotates the synchronous gear 19, a loading motor 21 and an intermediate gear 22 that drive the gear are attached.

Furthermore, a shaft bearing hole 7a is bored in the side guide 7, and shafts 13a of an R side frame 12 and an L side frame 13 that constitute a rotating frame 38, which will be described later, are rotatably supported in this hole.

A gear 12d is formed on the outer periphery of the R side frame 12, and a gear 25 meshing with the gear 12d, a reversing motor 20 for driving the gear 25, and an intermediate gear 22 are attached to the frame 1.

The side guide 7 is provided with a circuit board 1 by its boss 7b.
7 is attached, and a guide roller 27 for guiding a side angle 6, which will be described later, is pivotally supported.

Further, on the opposing surface of the side guide 7, there are horizontally linear guide surfaces 7c, 7ds, a vertical guide surface 7e continuous to the guide surface 7d, and a vertical guide surface 7e extending from the lower end of the guide surface 7e toward the 7C side. A horizontal guide surface 7f is formed, and the guide surface 7
A movable piece 36 is pivotally supported at the intersection of e and 7f.

The aforementioned rotating frame 38 is connected to the R side frame 12 and the L side frame 12.
The side frame 13 is connected by a clamper frame 14 and a spindle frame 15 to be integrated.

This spindle frame 15 includes a spindle motor 3.
, the head amplifier board 37 in Fig. 4, and the pickup 2.
and guide the pickup 2 in the tracking direction,
In addition, a drive means for driving in that direction and a drive motor 3 thereof
9 and a tilt drive mechanism (not shown) for following the warpage of the disk.

Further, as shown in FIGS. 4 and 6, the clamper frame 14 includes a clamper 4, a clamper plate 28 for holding the clamper 4, and a driving means for driving the clamper plate 28 in parallel. installed.

This driving means includes a clamper motor 35, a worm wheel 34 rotated by the clamper motor 35, a clamper gear 33, a clamp cam 32 that slides by the clamper gear 33, a clamp lever 30 whose one end is operated by the clamp cam 32, and the clamp lever. -3
It is constituted by a sub-lever 31 that intersects with 0.

Then, by moving the clamp cam 32 by rotating the clamp motor 35 and changing the angle of the clamp lever 30, the sub-lever 31 is also rotated to the same angle.
This is to move the clamper plate 28 in parallel.

A leaf spring 29 that biases the clamper 4 toward the spindle motor 3 is fixed to the clamper plate 28 .

The shaft 13a provided on the R and L side frames 12.13 is provided approximately at the center of the spindle motor 3 and clamper 4 in the vertical direction.

With respect to this position, the space formed between the spindle motor 3 and the clamper 4 is biased to one side.

To accommodate this, R and L side frames 12.1
3, in the correct position of the rotating frame 38, the side guide 7
A cam groove 13b1 that connects the guide grooves 7c and 7d and a type 1 cam groove 13c that connects the guide grooves 7C and 7f at the reversed position of the rotary frame 38 are provided on the opposing surfaces.

On the other hand, the rack 9 is formed with a cam groove 9a and a long hole 9b having approximately the same length as the cam groove 9a. A boss Ilb of the tray base 11 is inserted into the long hole 9b, and a side angle 6 is attached with screws 40.

The front side angle 6 is the roller 2 of the side guide 7.
7 and thus the tray base 1
1 is also slidable together with the side angle 6.

A boss lla is erected on the tray base 11, into which the tray 10 is vertically movably inserted.
The pin 10a is inserted into the inclined cam groove 9a and the boss 1
A tray nameplate 5 having a guide portion 5a provided at a position approximately equal to the maximum outer diameter of the disk 8 is attached to the upper end of the tray 1a.

In addition, the tray IO has an oblong pin 10 shown in FIG.
b is erected, and the guide groove 7c of the side guide 7,
7d, 7e, 7f and R, L side frames 12, 1
It is slidably inserted into the cam grooves 13b and 13c of No. 3.

Next, the operation of this double-sided performance disc player in the case of playing the A side will be explained with reference to FIG.

First, the loading motor 21 is activated by an open command.
By the zero rotation, the tray 10 protrudes to a position where the disk 8 is placed further to the left than in the state shown in FIG. 7-1.

At this time, when a disc 8 is placed on the tray 10 and a playback command is given, the loading motor 21 rotates in the opposite direction, and by rotating one synchronous gear 19, the left and right racks 9 are connected to both synchronous gears 19. By driving with
The left and right racks 9 move in parallel.

Due to this parallel movement of the rack 9, the pin 10a of the tray 10 is subjected to horizontal and downward forces by the inclined cam groove 9a of the rack 9, but the pin 10b of the tray 10 is inserted into the guide groove 7C of the side guide 7. Because there are
Tray 10 cannot be lowered.

Therefore, the tray 10 moves together with the rack 9 in the movement direction of the rack 9, that is, in the loading direction.

When playing on the flat surface, the rotating frame 38 is in the position shown in FIG. The tray 10 passes through the guide groove 7d and hits the inner end of the guide groove 7d, and the tray 10 cannot be moved any further in the carrying direction.

However, since the rack 9 attempts to continue moving in the loading direction, the pin 10a of the tray 10 is inserted into the inclined cam groove 9a.
The tray 10 is lowered as the pin 10b is lowered within the guide groove 10e.

As the tray 10 descends, the disk 8 is placed on the spindle motor 3, and as the tray 10 continues to descend further, the tray 10 separates from the disk 8.

When the pin 10 of the tray 10 descends to the lowest end of the guide groove 7e, it hits the movable piece 36 and rotates it to the state shown in FIG. 9-1.

In synchronization with the placing of the disk 8 on the spindle motor 3 due to the lowering of the tray 10, the clamper motor 35 rotates, moves the clamp cam 32, and moves the clamp lever 30,
The sub-lever 31 is rotated in the vertical direction, the clamper plate 28 is lowered, and the clamper 4 is placed on the disk 8.

Then, the clamper plate 28 continues to descend further, pressing the clamper 4 with the leaf spring 29, and by its biasing force,
The clamper 4 and disk 8 are pressed against the spindle motor 3.

The transition up to this point is schematically illustrated in FIG. 7-3.

When this state is reached, the spindle motor 3 and pickup 2 are operated by known means, and side A is reproduced.

Next, the operation from the end of the performance of the A side to the performance of the B side will be explained with reference to FIG.

When the performance of side A is completed, the clamper motor 35 rotates in the opposite direction to the above, and the clamp lever 30° sub lever 31 is rotated.
moves in the horizontal direction, raises the clamper plate 28, and lifts the clamper 4 away from the disk 8.

At the same time, the loading motor 21 rotates in the opposite direction to the loading direction to move the rack 9 in the unloading direction.

However, since the pin 10b of the tray 10 is prevented from moving toward the guide groove 7f by the movable piece 36 as shown in FIG. 9-1, the tray 10 cannot be moved in the unloading direction.

Therefore, the pin 10a of the tray 10 is raised by the inclined cam groove 9a of the rack 9, so the tray 10 is raised and the disk 8 is placed on it.

Then, when the pin 10b reaches the upper end of the guide groove 7C and cannot rise any further, the pin 10a moves the tray 10 in the unloading direction as the rack 9 moves in the unloading direction. The tray 1 is guided by the groove 7d, the cam groove 13b1, and the guide groove 7C.
0 reaches the position where the disk 8 is placed first.

In this position, even if the rotating frame 38 rotates, the tray 1
0, the position where it does not hit the disk 8.

When the tray 10 reaches this position, the reversing motor rotates, and due to the meshing of the reversing gear 25 and the gear 15 of the R side frame 12, the rotating frame 38 is rotated 180 degrees, and the positions of the spindle motor 3 and the clamper 4 are reversed. .

At this time, cam groove 1 of R and L side frames 12 and 13.
3c is continuous with the guide groove 7c on the carry-in side of the tray 10, and continues with the guide groove 7f on the back side.

In this way, when the rotating frame 380 is reversed, the loading motor 21 rotates in the carrying direction to move the rack 9 in the carrying direction.

As a result, the tray 10 also moves in the carry-in direction, but when the pin 10b reaches the vertical part of the cam groove 13C, the tray lO cannot move in the carry-in direction.
a is guided by the inclined cam groove 9a, and the tray 10 is lowered.

When the lowering is completed, the tray 10 is carried to the deepest position so that the pin 10b passes through the horizontal portion of the cam groove 13C and enters the guide groove 7f.

At this time, the pin 10b rotates the movable piece 36 as shown in FIG. 9-2 so that the pin 10b cannot rise.

In this way, the reason why the tray 10 is lowered midway is because the gap between the spindle motor 3 and the clamper 4 is
This is because it moves below the rotation center of the rotating frame 38.

Then, when the tray 10 moves to the deepest position, the clamper motor 35 rotates, vertically rotates the clamper arm 30 and sub-arm 31, and raises the clamper plate 28.

As it rises, the clamper 4 is brought into pressure contact with the disk 8 and the spindle motor 3, as in the case of playing the A side, and the rotation of the spindle motor 3 enables the disk to rotate 80 times.

In this way, the disk 8 is moved by the rise of the clamper 4.
Since it is set in the spindle motor 3, there is no need to raise the tray 10, unlike when playing side A.

The above operation is schematically illustrated in FIG. 8-3.

After this operation, the spindle motor 3 and pickup 2 operate in the same manner as for side A, and side B is reproduced.

Next, the operation of ejecting the disc 8 at the end of playing the B side or in response to an open command will be explained.

Upon completion of the performance of the B side or an open command, the clamper motor 35 rotates in the same direction as when the performance of the A side ends, and the clamper 4 is separated from the disc 8 in the same manner as at this time.

Then, the loading motor 21 rotates in the unloading direction to move the rack 9 in the unloading direction, but at this time, the movable piece 36 rotates in a direction to prevent the pin 10b from rising, and the tray 10 rises. Tray I
D moves together with the rack 9 in the unloading direction.

Therefore, the pin 10b passes through the guide groove 7f into the cam groove 13.
It reaches the bent part c, and its movement in the unloading direction is blocked.

Therefore, since the pin 10a is raised by the inclined cam groove 9a of the rack 9, the tray 10 is raised and the pin 10b
reaches the bent part of the cam groove 13c, and its rise is prevented,
The tray 10 passes through the cam groove 13C1 and the guide groove 7C, returns to the position where the disc 8 is placed on the tray 10, and the disc 8 can be removed.

゛ The above explained the case where side B is played following side A, but it is possible to stop after playing side A only, or to play side B.
It is also possible to perform only the side, or to move from the B side to the A side.

In the embodiment described above, a tray was used as a means for transporting the disk, but the transport means is not limited to this.

For example, a second embodiment using a feed roller will be described with reference to FIGS. 10 and 11.

In this embodiment, one disk 8 is stored in each parallel magazine 60.

Then, the performance device 64 in which the rotary player 38 to which the spindle motor 3, clamper 4, etc. of the previous embodiment are attached is installed is conveyed up and down by the feed screw 61 rotated by the select motor 62.

This performance device 64 includes a conveyance roller 50 and a pressure roller 5.
Two pairs of feed rollers constituted by 4 are provided.

The conveyance roller 50 is supported by a roller base 51 and is driven by a roller motor (not shown).
is attached to a drive plate 53 that is rotated by a drive motor 53.

Further, the pressure roller 54 is urged toward the conveyance roller 50 by a spring 56 installed on an arm rod 55 that pivotally supports the pressure roller 54 .

In this double-sided disc player, the conveyance roller 50 is separated from the pressure roller 54 by the rotation of the drive motor 53.

When a performance disc is designated from outside, the select motor 62 rotates, the performance device 64 moves up and down to the required height, and a part of the designated disc 8 is placed in the magazine 6.
Extruded from 0.

Then, the drive motor 53 rotates, pinches the disk 8 pushed out by the conveyance roller 50 and the pressure roller 54, and sends it between the spindle motor 3 and the clamper 40.

When this feeding is completed, the conveyance roller 50 separates from the pressure roller 54, the disk 8 becomes free, and the clamper 4 presses it against the spindle motor 3 to start its performance.

When the performance is finished, the disc 78 is sandwiched between the transport roller 50 and the pressure roller, and while the disc 78 is carried out to the initial position, the rotating frame 38 is reversed, and in the same manner as described above, the disc 78 is placed on the opposite side of the disc 8. It is something that can be played.

In addition to the above embodiments, the pickup 2 is not limited to the vertical direction, and the inversion angle of the rotating frame 38 is not limited to this angle as shown in FIGS. 12 and 13. do not have.

The figure shows a system in which a tray 10 on which a disc 8 is placed is guided by a guide roller 70.
A guide plate 71 that pivotally supports the tray 10 is moved by a link 72 to change the direction in which the tray 10 is carried in by the guide roller 70.

As shown in FIGS. 12-1 and 13-1, the rotating frame 38 does not need to be reversed 180 degrees.

In the above embodiment, the disk 8 in which the A and B sides are integrated or attached is explained, but it is also possible to use two disks with only one side, such as an audio compact disk, stacked back to back, and to play two disks. You can also do that.

Furthermore, in the above embodiment, an independent clamper motor 35 is used to operate the clamper 4, but as in Japanese Patent Application No. 59-029308, the power of the loading motor may be taken out by a clutch mechanism. good.

Similarly, for the reversing motor 20, the output of the loading motor may be taken out by a clutch mechanism.

As the pickup 2, an optical type or a VHD capacitive type is used for a disc on which digital signals are recorded, and an analog type pickup is used for a record on which sound grooves are recorded.

In the embodiment described above, the rotation center of the rotating frame 380 is offset from the space between the spindle and the clamper in order to reduce the outer diameter of the rotating frame 38, but if the outer diameter of the rotating frame 38 is large, If the height of the disc player can be high, the structure can be simplified by making the height of the disc player the same as that of the disc player.

〔Effect of the invention〕

As mentioned above, the present invention includes a spindle motor, a clamper,
A rotating frame equipped with a pickup is turned over while the disc is being carried out to the loading position, so that both sides can be played.

Therefore, unlike a double-sided performance device that flips over a disc, the external size of the device does not increase and can be made more compact, which is particularly effective for LP records, laser discs, and the like.

Moreover, compared to a system in which pickups are provided on each of the AB sides, only one expensive pickup is required, and a circuit for switching the output thereof is not required, so that the cost can be significantly reduced.

Furthermore, unlike double-sided discs, where there is an eccentricity between them, there is no risk of tracking errors occurring due to the eccentricity of the other disc, which occurs when both sides are played while the center of one disc is supported. .

Furthermore, by adding a rotating frame to a disc player that has a loading device for loading discs, it is possible to play on both sides, so there is no need to design a new loading device, and the structure is simple.

Furthermore, since the spindle motor, pickup, and clamper are installed on the rotating frame, their relative accuracy is improved.

Moreover, compared to a method in which the pickup is reversed, there are many advantages such as increasing the rigidity of the pickup.

[Brief explanation of the drawing]

Figures 1 to 9 show one embodiment of the present invention.
The figure is an exploded slope view, Figure 2 is a plan view, Figure 3 is a vertical side view, Figure 4 is a sectional view taken along the rV-TV line in Figure 3, and Figure 5 is the same V
-■ line sectional view, Figure 6 is a side view showing the spindle motor and clamper, Figures 7-1 and 7-2 show the transport state of the A-side performance, and Figure 7-3 shows the disc transport route. 8-1 and 8-2 are schematic diagrams showing the conveyance state of the B-side performance, and FIG. 8-3 is a schematic diagram showing the conveyance path of the disc, and FIG. 9-1.
9-2 is a side view showing the movement of the movable piece when playing the A side and B side, and FIGS. 10 and 11 are a schematic sectional view of the entire other embodiment and a schematic illustration of the playing device. The sectional views, FIGS. 12 and 13 show still other embodiments, and FIGS. 12-1 and 12
Figure 13-1 to 13-3 are schematic diagrams showing the conveyance of side A performance, Figure 14 is a schematic sectional view of the conventional example, and Figure 15 is a schematic cross-sectional view of the conventional example. FIG. 3 is a cross-sectional view showing a state in which a disk is fitted to a spindle. 2...Pickup, 3...Spindle motor, 4
... Clamper, 7... Side guide, 8... Disc, 9... Rack, 10... Tray, 20...
Loading motor, 21... Reversing motor, 24...
・Loading gear, 25...Reverse gear, 36...
Movable piece, 38... rotating frame. Patent applicant Pioneer Corporation No. 9-20 No. 12-10 No. 12-2 Cause No. 13-10 No. 13-Summary No. 13-3

Claims (1)

[Claims] a conveying means for moving a disc from a standby position in a plane direction of the disc and carrying it into a playback position; a spindle for rotating the disc; a clamper for pressing the disc toward the spindle so that the disc is rotated by the spindle; A double-sided playable disc, comprising: a rotating frame equipped with a pickup for reproducing a signal; and a reversing means for reversing the rotating frame while the conveying means carries the disc to a standby position. player.