JPS6231420B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reproducing device that reproduces signals from a disc-shaped recording medium (recording disc), and allows recording onto a turntable without the user directly touching the recording disc. This invention relates to a playback device on which a disc can be placed.

Recording disks (hereinafter referred to as disks), generally called video disks, have a very high density (for example, the groove pitch is 45 μm and the groove depth is very shallow), so they must be handled with care. In particular, if the surface is contaminated with dust, scratches, fingerprints, etc., it may cause dropouts, locked groups, etc., and stable playback cannot be performed. Therefore, not only is there a desire for a playback device that can be placed on a turntable and played back without touching the video disk directly, but in recent years, it has also become necessary to use multiple disks in response to the program contents of software. There is a need for a reproducing device that can continuously reproduce. Conventionally, this type of playback device has a number of containers each containing a single disk, which are replaced one after another to perform playback over a long period of time, but this requires a complicated mechanism to replace the containers. Moreover, there is a drawback that the replacement time becomes long. According to the present invention, a storage container in which a plurality of disks are stored in one container is placed on the device, and the plurality of disks are sequentially reproduced, thereby achieving an extremely short disk exchange time for this type of device. It is possible to provide a playback device that is compatible regardless of the number of stored discs, and an embodiment thereof will be described below with reference to the drawings.

FIG. 1 is a schematic diagram of the configuration of a disk storage container that can be used in the playback device of the present invention, in which 2 is a disk with signals recorded on both sides, and 3a and 3b are disc-shaped protectors with a slightly larger diameter than disk 2. The plate 1 is a quadrilateral-shaped base made of, for example, a highly rigid resin, and the plate 1 has a slightly larger diameter than the disk 2 that can accommodate the disk 2, and has the protective plates 3a, 3 in the center thereof.
A through hole 4 having a smaller diameter than b is provided. The front and back outer circumferences of the through-hole 4 are provided with recesses 5a having a slightly larger diameter than the protection plates 3a and 3b, respectively.
5b is provided.

Further, on the front and back sides of the four corners of the base 1, there are engagement claws 6 having a structure described later and having some flexibility for engaging and fixing the protection plates 3a and 3b to the base 1.
Engagement claws 6a', 6b', 6c', and 6d' having a similar structure are also provided on the rear surfaces of the engagement claws a, 6b, 6c, and 6d, respectively, so as to be slidable.

FIG. 2 is an enlarged configuration diagram of the front and back engaging claws 6a, 6a' provided at one corner.
A guide part 8 bent in an L shape is located in the center of a'.
a, 8a', and the tips have protrusions 9a, 9 for preventing slipping off.
a', and release engagement holes 10a and 10a' are provided at the other end, respectively.

Furthermore, tapered surfaces 11a, 11a are provided at the distal edges of the engaging claws 6a, 6a'.

On the other hand, the engagement claws 6a,
Guide recesses 7a, 7a', . . . to which 6a' is fitted and engaged
(7a' is located on the back side of 7a and is not shown in Figure 2)
is provided. One end of the guide recesses 7a, 7a' opens into the recesses 5a, 5b. A through hole 15 is formed in the guide recesses 7a, 7a', and recessed sliding surfaces 12a, 12a' that engage with the guide parts 8a, 8a' are formed. One end edge 13a, 13 of the recessed sliding surface 12a, 12a'
The guide portions 8a, 8a' are brought into contact with a' to regulate the sliding position of the guide portions 8a, 8a' (engaging claws 6a, 6a'). Further, one end portion 14 of the through hole 15
The retaining protrusions 9a, 9a' are in contact with the
The sliding position of the engaging claws 6a, 6a' is restricted. Third
The figure shows the engaging claws 6a, 6a' in guide recesses 7a, 7.
This shows the state where it is attached to disk 2.
is housed in the through hole 4, and there are protective plates 3 above and below it.
a and 3b are located. This protective plate 3a, 3
The outer peripheries of b are located on the recesses 5a and 5b, respectively, and the tapered surfaces 18a and 1 provided on the outer peripheries
The protection plates 3a and 3b are engaged and fixed to the substrate 1 by pressing the engagement claws 6a and 6a' on the portions 8b and 8b, respectively. Engagement claw 6 in this state
To explain the state of a and 6a' with reference to FIG.
a, 8a' are slidably engaged with the sliding surface portions 12a, 12a', respectively, and prevent the engaging claws 6a, 6a' from coming off in the thickness direction of the base plate 1.

Also, the ends 17a, 17 of the engaging claws 6a, 6a'
a' are the terminal edges 16 of the guide recesses 7a and 7a', respectively.
a, 16a' and the engaging claws 6a, 6
The retaining protrusions 9a, 9a' provided at a' come into contact with the end portion 14 of the through hole 15, thereby preventing the engaging claws 6a, 6a' from sliding.

With the above configuration, the disk 2 includes the protection plate 3a,
It is housed and fixed to the substrate 1 in the shape of being sandwiched by the parts 3b. FIG. 4 shows a state in which the disc 2 is placed on the turntable by sliding the engagement claw 6a'. From the state shown in FIG. (not shown) and
After bending the end of the engagement claw 6a' in the direction of arrow A and releasing the contact relationship between the edge 17a' of the engagement claw and the terminal edge 16a' of the guide recess 7a', move in the direction of arrow B. As a result, the state shown in FIG. 4 is achieved. That is, the engagement between the engagement claw 6a' and the protection plate 3b is released, and the disk 2 is separated from the base plate 1 together with the protection plate 3b. Note that the sliding movement of the engagement claw 6a' in the direction of arrow B is performed by the guide portion 8.
The movement position of a' is regulated by contacting the edge 13a' of the sliding surface 12a'. Furthermore, although the above description has been made regarding the engaging claws 6a and 6a', the other engaging claws have a similar structure.

Next, an example of a playback device according to the present invention is shown in FIGS.
It is shown in FIG. FIG. 5 is an external configuration diagram, which includes a case 19, a chassis 20, a dust cover 21, an operation switch 22, and an indicator 23.

FIG. 6 shows the configuration after removing the dust cover 21 in FIG. 5, and a turntable 24 is located in the center of the turntable 24, which is used in a conventional audio autochanger. It has an umbrella type shaft 25. The loading base 26 is fixed to the chassis 20 with a predetermined gap with respect to the turntable 24, and in the center thereof there is an elevating ring 28 disposed around the turntable 24, and the above-mentioned protection ring. A through hole 27 with a larger diameter than the plates 3a and 3b is provided, and at the four corners there are guide plates 29 for regulating the placement position of the storage container, a storage container locking member 30, and a storage container engagement claw. A long hole 34 is provided in which a release pin 33 that engages with each release engagement hole 10a-10d, 10a'-10d' of 6a-6d, 6a'-6d' can move. The other end of this release pin 33 engages with a cam groove 32 of a disc cam 31 rotatably supported on the loading base 26 coaxially with the through hole 27 (see details of this release pin section). (described later).
36 is a pickup for detecting signals from the aforementioned disk, and 35 is its pickup carriage.

Figures 7A to 7C show the c-c' cross section of Figure 6, where Figure 7A is before the storage container is placed, Figure 7B is in the regenerated state, and Figure 7C is after the regeneration. The disc cam 31 is rotatably supported on the loading base 26 by a support member 37, and a part of the disc cam 31 is connected to a gear 39 of a disc cam drive motor 38 attached to the loading base 26. A meshing gear part (not shown) is provided,
The drive motor 38 selectively drives the disc cam 31 to rotate in forward and reverse directions. A vertical screw 40 is attached to the elevating ring 28, and a rotating nut 4 supported by the chassis 20 that fits with the vertical screw 40 is attached to the elevating ring 28.
A rotation preventing means (not shown) is provided for the lifting ring 2 to correspond to the rotation of the rotating nut 41.
8 has a structure that can be raised or lowered. Note that a driving source for the rotating nut 41 is not shown. The other end of the umbrella type shaft 25 is the cam groove 4 of the drive cam 42.
3, and has a conventional configuration in which the disks are dropped one by one. The pick-up cartridge 35 has a bearing 4 fixed to the chassis 20.
The turntable 24 is driven by a feed motor 47 through a guide rod (not shown) fixed to the guide rods 4 and 45 and a feed screw 46 rotatably supported, so that it can scan in the radial direction of the turntable 24. Incidentally, the series of operations from FIG. 7A to FIG. 7C will be described later.

8 to 10 are detailed operational diagrams of the release pin 33 portion. FIG. 8 shows the standby position, FIG. 9 shows the intermediate position, and FIG. 10 shows the loading completion position, which will be explained in sequence below.

8A is a perspective view of the standby position, FIG. 8B is a sectional view taken along line D-D', FIG. Figure E is a perspective view showing the support portion of the release pin 33. The release pin 33 has a notch 48 at the top, and a spring 49
The pin 51 is housed and held in the boss 50 so as to be able to slide up and down while being biased upward by the pin 50, and a pin 51 that contacts the disc cam 31 and has a rotation preventing effect with respect to the boss 50 is fixed to the lower part. As a result, the structure is such that it can be moved up and down in correspondence with the disc cam 31 and the upper and lower cams 52 and 54 attached to the disc cam 31. Boss 50 is loading base 2
The slide plate 5 is held slidably in the directions of arrows V and W in the figure by a guide portion 56 attached to the slide plate 5.
7, and its lower part engages with the cam groove 32 of the disc cam 31, allowing it to move in the directions of arrows V and W in the figure along the cam groove 32 as the disc cam 31 rotates. It's structured. Incidentally, as shown in FIG. 8C, the cam groove 42 is shaped such that it once faces toward the center from the standby position, and then toward the outer circumference. The upper and lower cams 52 and 54 are provided with inclined portions 53 and 55 so that the pin 51 can slide smoothly. In the standby position shown in FIG.
It is in a sunken state corresponding to the thickness of 4. From this state, the aforementioned disc cam drive motor 38
As a result, the disc cam 31 is rotated in the direction of the arrow x in the drawing, and thereby enters the intermediate position shown in FIG.

FIG. 9A is a perspective view of the intermediate position, and FIG. As the slide plate 57 moves in the direction of the arrow V in the figure, the pin 51 descends the inclined portion 55 of the upper and lower cams 54 and comes into contact with the lower surface of the disk cam 31. As a result, the release pin 33 is raised by the spring 49 in accordance with the thickness of the upper and lower cams 54. When the disc cam 31 further rotates in the direction of the arrow x in the figure from this state, it reaches the loading completion position shown in FIG. 10.

Figure 10A is a perspective view of the loading completed position;
FIG. 10B shows a cross section taken along line F-F', and as the disc cam 31 rotates from the state shown in FIG. 9, the boss 50 moves along the cam groove 32, and the slide plate 5
7 further moves in the direction of arrow V in the figure, the pin 51 ascends the inclined portion 53 of the upper and lower cams 52 and comes into contact with the upper and lower cams 52. As a result, the release pin 33 sinks against the spring 49 in accordance with the thickness of the upper and lower cams 52. The above series of operations is performed by the disk cam 31.
This occurs in synchronization with the four release pins 33 shown in the figure. The loading operation is thus completed, and the stroke of the cam groove 32, the thickness of the upper and lower cams 52 and 54, and their timing are configured to be optimal. Further, unloading can be performed by reversing the disc cam 31 from the state shown in FIG.

FIGS. 11A to 11D are operation diagrams in a state where the aforementioned storage container is placed, and below, FIGS.
The explanation will be given one by one with reference to Figure 0.

FIG. 11A shows the above-mentioned storage container placed in the standby position shown in FIGS. 7A and 8. 3b and the center hole of the recording disk 2 are engaged, and the outer circumferential portion of the base 1 is engaged with the guide plate 29 on the loading base 26 to define the position, and the locking member 30 is used to prevent the base 1 from being positioned in the vertical direction. The location is defined. As a result, the release engagement hole 10a' of the engagement claw 6a' is disposed directly above the release pin 33. In this state, the release pin 33 is sunk, so it does not interfere with the placement and removal of the storage container. From this state, when the disc cam 31 is rotated by the disc cam drive motor 38 in the direction of the arrow x in FIG.
1 descends the slope 55 of the upper and lower cams 54, the release pin 33 is raised by the spring 49 in accordance with the thickness of the upper and lower cams 54, and its tip enters the release engagement hole 10a', and the boss 50 moves along the cam groove 32, and the slide plate 57 moves in the direction of arrow W in FIG. 8A. In other words, the state shown in FIG. 11B is obtained by moving toward the center of the shape of the cam groove 32 shown in FIG. 8C. From this state, the disc cam 31
When the button rotates, the boss 50 moves along the cam groove 32, and the slide plate 57 moves in the direction of arrow V shown in FIG. It moves to the abutting position and becomes the state shown in FIG. 11C. During this operation, the release pin 33 is not moved up or down. When the disk cam 31 further rotates from this state, the pin 51 ascends the inclined part 53 of the upper and lower cams 52, and the release pin 33 is moved upward by the spring 4 in accordance with the thickness of the upper and lower cams 52.
9, the upper part of the notch 48 comes into contact with the engagement claw 6a', and uses the flexibility of the engagement claw 6a' to come into contact with the terminal edge 16a' of the base 1 (FIG. 2). (see) is pulled down to release it, resulting in the state shown in FIG. 11D. The cam groove shape is such that the slide plate 57 is not moved during this operation. When the disk cam 31 further rotates from this state, the boss 50 moves into the cam groove 31.
The slide plate 57 moves along the arrow V in FIG.
By moving in the direction, the guide portion 8a' of the engagement claw 6a' slides on the recessed sliding surface 12a' (second
(see figure), the engagement and fixation of the protection plate 3b to the base 1 is released, the state shown in FIG. 11E is reached, and the rotation of the disc cam 31 is stopped. During this operation, the release pin 33 is not moved up or down. As a result, the protection plate 3b and the three disks 2 are placed on the umbrella shaft 25. In addition, from Figure 11 A to 1
The rotation angle of the disc cam 31 up to E in FIG. 1 is determined by, for example, a micro switch (not shown). From the state shown in FIG. 11E, the umbrella type shaft is driven in the same way as the audio autochanger, causing the protection plate 3b and the first disk 2 to fall onto the turntable 24, resulting in the playable state shown in FIG. 11F. . In this state, the turntable 24 is driven by the drive motor 58, and
As shown in FIG. 7, the pick-up cartridge 35 is driven by the feed motor 47, moves in the radial direction of the disk 2, and performs a reproducing operation.
In other words, the state shown in FIG. 7B is reached. When the reproduction of the first disc is completed, the pick-up cartridge 35 returns to its original position (the position shown in FIG. 7A), and the umbrella shaft 25 operates to drop the second disc. The same operation is carried out thereafter, and when the reproduction of the third disc is completed, the pick-up cartridge 35 returns to its original position, and the rotating nut 41 shown in FIG. 7 is rotated.
The elevating ring 28 places the three disks 2 through the protective plate 3b and rises, resulting in the state shown in FIG. In other words, the state shown in FIG. 7C is reached. From this state, the disk cam 31 is reversely rotated by the disk cam drive motor 38, and unloading is performed by performing the above-mentioned series of reverse operations. Above 11th
The series of operations from Figure A to Figure 11 E are performed by the disc cam 3.
1, the four release pins 33 disposed on the loading base 26 are simultaneously and continuously operated, and the operations from FIG. 11H to FIG. 11G and the unloading operation are also continuously performed. be. If the back side of the disk is to be recycled, the storage container may be placed upside down on the loading base 26 and the series of operations described above may be performed.

12 to 14D show a second embodiment of the playback device according to the present invention, in particular, the storage container is provided with means for placing the discs one by one on the turntable. FIG. 12 is a perspective view of the main parts of the storage container, and in addition to the aforementioned fixing claw 6a, the board 1
Each of the disks 2a to 2c is rotatably supported by a shaft. Selection tabs 59 are provided at four locations, for example. FIG. 13 is a perspective view of the selection claw 59. The selection claw 59 is provided with protrusions 61 and 62 having different protruding angles, each having a penetrating meniscal hole 60 and a pitch into which a disc is fitted. . FIG. 14A to FIG. 14D are operation diagrams when this storage container is used. A rotating pin 63 that engages with the engagement half-moon hole 60 is rotatably attached to the loading base 26. It is being First, when the storage container is placed in the state shown in FIG. 7A, the above-mentioned release pin 33
is in a position where it can be engaged with the release engagement hole 10a', and the pivot pin 63 is in the state shown in FIG. 14A where it is engaged with the engagement half-moon hole 60. From this state, the operations from FIG. 11A to FIG.
d' is disengaged from the protective plate 3b, and the protective plate 3b and the first disk 2a fall onto the turntable and are placed in the state shown in FIG. 14B. In this state, the second and third disks 2b and 2c are
It is supported by protrusions 62 and 61 of the selection claw 59. When the playback of the first disc 2a is finished,
The selection claw 59 is rotated by a certain angle by the rotation of the rotation pin 63 (driving source not shown), the engagement between the second disc 2b and the protrusion 62 is released, and the second disc 2b is turned. It falls and is placed on the table, resulting in the state shown in FIG. 14C. In this state, since the projection angles of the projections 61 and 62 are different, the third disk 2c is supported by the projection 61. When the reproduction of the second disk 2b is completed, the rotation pin 63 is further rotated, the selection claw 59 is rotated by a certain angle, the engagement between the protrusion 61 and the third disk 2c is released, and the third disk 2c is not dropped or placed. The state shown in FIG. 14D is reached. When the reproduction of the third disk 2c is completed, the elevating ring 28 rises as shown in FIG.
After entering between the respective disks 2a to 2c, the disc cam 31 reverses, and unloading is completed, as in the first embodiment. Note that in this embodiment, the aforementioned umbrella type shaft 25 is not required, and an ordinary shaft may be used. Also, selection tab 59
It is desirable to provide it at a position where it can engage with the rotation pin 63 even when the storage container is reversed (when playing the back side).

Two embodiments have been described above, but the first embodiment
The umbrella type shaft in the embodiment can be either fixed or rotating by changing its configuration. It is also possible to adopt a configuration in which the portion that engages with the disk placed on the turntable has a double structure so that the portion can be rotated. Also,
Although the description has been made assuming that the number of disks in the storage container is three, this is not limited to this number and may be any number.

Furthermore, the surfaces of the protective plates 3a and 3b located inside the container may be used as signal surfaces, and the protective plates 3a and 3b may be used as disks.

As described above, the use of the reproducing apparatus according to the present invention provides the following effects.

Since the user can play the disc without touching it at all, there is no risk of scratches on the disc. No fingerprints etc.

Since only one storage container is required, handling is easy.

Since it is only necessary to operate one storage container, the mechanism becomes extremely simple.

When replacing the discs, it is only necessary to replace the discs in the container one after another, which makes the replacement time extremely short and the mechanism required therefor simple.

Since the structure is such that the discs contained in the container are sequentially reproduced, compatibility is maintained even if the number of stored discs differs depending on the program content.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the recording disc storage container used in the present invention, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3A is a perspective view of the main parts in the recording disc holding state. Figures 5 and 11 are sectional views of the same essential parts, Figure 4 A is a perspective view of the same essential parts with the recording disk released from holding, Figure 4 B is a sectional view of the same essential parts, and Figures 5 to 11 are parts of the present invention. Fig. 5 is a perspective view showing an embodiment of the playback device main body of the present invention, Fig. 6 is a partially cutaway perspective view of the same, Fig. 7 is a side sectional view of the same, and Fig. 8 B is a side sectional view of the same part, C is a plan view of the same part, D is a side view of the same part, E is a partially cutaway perspective view of the same part, FIG. 9 A is a perspective view in another operating state , B is a sectional view of the same side, FIG. 10 A is a perspective view in another operating state, B is a sectional view of the same side, FIGS. 11 A, B, C, D,
12 is a cutaway perspective view of the main part of another embodiment of the present invention, FIG. 13 is a perspective view of the main part, and 14
Figures A, B, C, and D are side sectional views of main parts in different operating states. 1...Storage container base, 2...Record disc, 3a,
3b...protective plate, 6a, 6b, 6c, 6d...engaging claw, 24...turntable, 25...umbrella type shaft, 26...loading base,
28... Lifting ring, 33... Release pin, 35...
...Pick up kiyaritsuji.

Claims (1)

[Scope of Claims] 1. A recording disc storage container having an engagement holding means for holding a plurality of recording discs having an engagement through hole in the center thereof in a manner that allows them to be engaged with and separated from a recording disc storage base, and the recording discs therein. a storage container holding means for holding a storage container; and a storage container holding means that engages with the engagement holding means of the recording disk storage container held by the storage container holding means, and releases the engagement holding means from holding the recording disk. A driving holding release means sequentially moves the plurality of recording disks released from the holding from the recording disk storage base into one
a recording disk mounting means for guiding and placing the recording disks one by one on the turntable; a reproducing means for reproducing signals from the recording disks on the turntable; A recording disc reproducing device comprising a recording disc storage means stored in a recording disc storage container held on a storage container holding plate. 2. The holding and releasing means is configured to simultaneously release the engagement and holding of a plurality of recording disks and the recording disk storage base. 2. The recording disc reproducing apparatus according to claim 1, wherein the recording disc reproducing apparatus is configured to hold a plurality of recording discs and place them one by one on a turntable. 3. The recording disk engagement and holding means is provided corresponding to each of the plurality of recording disks, and the holding and releasing means is configured to selectively drive the plurality of engagement and holding means. A recording disk reproducing device according to claim 1, characterized in that: