JPH0481827B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a disc performance device, and more particularly to a disc selection performance device that prepares a plurality of information recording discs such as video discs and selectively plays a designated disc.

BACKGROUND ART A disk selection/playing device has been proposed that prepares a plurality of information recording disks (hereinafter simply referred to as disks) and selectively plays one of the disks in response to a command operation by an operator.

Such a disk selection playing device selectively takes out a desired disk from a disk storage section in which a plurality of disks are arranged and stored, using a disk transport mechanism, and transports it to a playing section including a turntable and a pickup. The disc is clamped onto a turntable and rotated, while the recorded information is read and reproduced via a pickup.

In such a disk selection performance device, the disk is automatically taken out from the storage section and transported to the performance section to play the disk, and after the performance is finished, the disk is taken out from the performance section and returned to the correct position in the storage section for the next play. This allows a series of operations to be performed smoothly in preparation for a performance command. Therefore, it is preferable that the above-mentioned elements and their mutual positional relationships be assembled with sufficiently high dimensional accuracy so that they are not exposed to artificial external forces during use, and usually at least when the disk is gripped, transported, or The area where the instrument is played is usually surrounded by a sturdy case. The housing is provided with an opening/closing door, and the door is opened when replacing a disk or the like.

In addition, there is a high possibility that a large impact will be applied to the device during transportation, so in order to firmly connect the disk transport mechanism to the casing and withstand the impact during transportation, a transportation lock pin is provided on the casing and this lock pin is attached to the disk. It is designed to be inserted into a screw hole provided in the transport mechanism.

However, after transportation is complete, if you open the opening/closing door, load the disc into the disc storage compartment, turn on the power, and give a performance command, you may have forgotten to release the mechanical lock of the disc transport mechanism. Excessive load is placed on the driving motor, which adversely affects not only the motor but also the mechanical parts.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a disc selection/playing device having a protection function against erroneous operations in which the user forgets to release the transportation lock mechanism and attempts to turn on the power and play the disc.

In the disk selection performance device according to the present invention, if the locked state of the transportation lock mechanism is detected immediately after power is turned on, the door can be opened or opened automatically.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

In the figure, reference numeral 1 designates the entire disk performance apparatus which prepares a plurality of information recording disks such as video disks and performs selectively.

As shown in FIG. 1, the housing 2 as a whole is formed, for example, in the shape of a rectangular parallelepiped, and a window is provided on the front side of the housing, which is biased to the left, through which a disk can be taken in and taken out of a disk storage section, which will be described later. ing. However, the left side referred to here means, for example, the direction toward the front indicated by the arrow Y in FIG. 2, and is indicated by the arrow X. Further, the direction of arrow Z is upward. The above-mentioned window for putting in and taking out the disk is formed over almost the entire length of the housing 2 in the vertical direction, and a door 3 is provided to close the window.
is provided. Almost the entire surface of the door 3 is made of a transparent glass plate 3a, etc., so that the mechanism inside the housing 2 can be seen from the outside of the housing. Note that an operating section 5 for operating the disc playing device is placed on the housing 2. The operation section 5 has an adjustment section 6 for adjusting the volume, etc., and a music selection section 7 including a keyboard 7a for selecting songs, and a coin is placed on the left side of the adjustment section and the music selection section. A coin receiving section 8 for receiving coins is arranged. Furthermore, casters 10 are provided on the bottom surface of the housing 2 to facilitate transportation of the disc playing device.

As shown in FIG. 2, the housing 2 has an underbase 11 forming the bottom of the housing and a frame 12 as a pivot. This frame 12 is made of lightweight angle iron or the like. housing 2
Inside, behind the disk loading/unloading window, that is, on the rear left side of the housing, there are a plurality of disks 15.
A disk storage section 16 is provided in which disks can be sequentially arranged and stored at a predetermined pitch. In this case, the plurality of disks 15 are arranged and housed in the vertical direction (arrow Z direction and the opposite direction). Note that these disks 15 are called optical disks that record and read signals using, for example, laser light. As is clear from FIGS. 3 and 4, the disk storage section 16 has a large number of disk carrying units 17 stacked on top of each other in the disk arrangement direction. 3 shows the uppermost layer of the disk storage section 16, and FIG. 4 shows the lowermost layer of the disk storage section 16.

As shown in FIG. 3, each disk carrying unit 17 is composed of a plate-like member 18 having two sides 18a and 18b that are perpendicular to each other and having a semicircular disk storage portion 18c on its main surface. each disk 1
5 is positioned and housed by the disk center hole fitting into a positioning protrusion 18d protruding from the main surface of the plate-like member. In order to reduce the weight of this plate member 18, the apex portion 1 of the two sides 18a and 18b
8e is cut into a substantially triangular shape. As is clear from the figure, the extensions of the two sides 18a and 18b and the extension of the diameter D of the semicircular disk storage portion 18c form a right triangle. Each disk carrying unit 17 has two sides 18a, 1
A single shaft 20 is fitted near the apex of 8b. In addition, each disk carrying unit 17
A pair of shafts 21 and 22 are fitted in the vicinity of the ends of the two sides 18a and 18b, respectively. As shown in FIG. 2, each shaft 20, 21, and 22 is fixed to the underbase 11 at its lower end. These shafts 20, 21, and 22 constitute slip prevention means for preventing each disk carrying unit 17 from slipping.

As shown in FIG. 4, each disk carrying unit 17 is stacked on a receiving plate 24 provided near the lower ends of shafts 20, 21 and 22. As shown in FIG. This receiving plate 24 is fitted onto each of the shafts 20, 21, 22, and its downward movement is restricted by three retaining rings 24a. As shown in FIG. 3, on top of each stacked disk carrying unit 17 is a presser plate 25 that fits into the shafts 20, 21, 22.
is provided. For example, a nut 26 is screwed into the first threaded portion 20a at the upper end of the shaft 20.
Nuts 26 are similarly screwed into the upper ends of the other shafts 21 and 22. A coil spring 27 is provided between the nut 26 and the holding plate 25.
is compressed through a washer 27a.

The receiving plate 24 and the holding plate 25
The nut 26, the coil spring 27, and small peripheral members related thereto constitute a pressing means for pressing each disk carrying unit 17 in the stacking direction. It should be noted that this pressing means and the above-mentioned anti-slip means consisting of the shaft 20 and the like are included in the disk storage section 16.

As is clear in FIG. 2, an upper base 29 is provided further above the presser plate 25 provided above each stacked disk carrying unit 17, and an upper base 29 is provided, for example, on the shaft 2.
It is fixed by a nut 30 to a second threaded portion 20b (shown in the third figure) formed at the uppermost end of the screw.

As shown in FIG. 2, the underbase 11
A disc playing means for playing the disc, which includes a turntable 31, a spindle motor 32, an optical pickup 33, etc., is arranged approximately in the center of the disc. This disk playing means has approximately the same structure as the disk playing means included in the front loading disk player filed by the applicant in Utility Application No. 58-169560, for example, and the detailed structure thereof will not be described in detail here. Not mentioned.

Next, any one of the plurality of disks 15 arranged and stored in the disk storage section 16 is sequentially selected and placed at the performance position, that is, on the turntable 3.
The disk ejecting and conveying mechanism for conveying the disk onto the disk 1 will be explained.

As shown in FIG.
A pair of guide shafts 36 and 37 are provided as guide members extending along the disk arrangement direction, that is, in the vertical direction, and are fixed to the underbase 11 at the lower end. Further, the upper end portions of both guide shafts 36 and 37 are fixed to an upper base 29. A base 40 is slidably attached to both guide shafts 36, 37. Both guide shafts 36 and 37
extends along the front surface of the housing 2, so that the base 40 moves near the front surface of the housing where the window for loading and unloading disks is provided. As is clear from FIG. 5, the base 40 is formed as a single straight bar as a whole. Describing in detail how the base 40 is attached to each of the guide shafts 36 and 37, the base is slidably and closely fitted to the guide shaft 37 at a cylindrical portion 40a provided approximately at the center in the longitudinal direction of the base. The left end portion is slidably engaged with the guide shaft 36 via a pair of rollers 41a, 41b made of ball bearings or the like. Of the pair of rollers, the front roller 41a is provided at the swinging end of a lever 41c that is swingably attached to the base 40 in a plane perpendicular to the direction of movement of the base. This lever 41c is biased in a direction in which the roller 41a approaches the guide shaft 36 by a coil spring 41d.

As is particularly clear in FIG. 6, a small spindle 43b is rotatably provided on the underbase 11 via a bracket 43a, and a pair of toothed belt wheels 4 are provided at both ends of the small spindle.
3c and 43d are fitted respectively. A motor 44 is fixedly installed near the bracket 43a via a fixing plate 44a, and a toothed belt 46 is connected to the toothed belt pulley 44b fitted to the output shaft of the motor and the toothed belt pulley 43b. It is being constructed.
On the other hand, there is also a bracket 29a on the upper base 29.
and the toothed belt pulley 2 via the small spindle 29b.
9c is rotatably attached, and a toothed belt 47 is installed between the toothed belt pulley 29c and the toothed belt pulley 43c. A portion of the toothed belt 47 is fixed to the base 40. That is, by rotating the motor 44 in the forward and reverse directions, the base 40 is reciprocated up and down.

As shown in FIGS. 2 and 6, the base 4
A rail 49 as a guide member is provided in front of the guide shaft 37 and parallel to the guide shaft 37. The rail 49 is formed to have a substantially C-shaped cross section perpendicular to its longitudinal direction, and a counterweight 50 is fitted into the internal space of the rail so as to be movable in the vertical direction. As is clear in FIG. 6, the counterweight 50 is connected to the rail 49
It is connected to the base 40 by a wire 53 installed between pulleys 51 and 52 provided in pairs at the upper and lower ends. That is, the counterweight 50 is guided by the rails 49 and moves relative to the base 40.

As shown in FIG. 6, a pair of swinging members 55 are provided at one end of the counterweight 50 that engages with the rail 49, that is, the right end, and are spaced apart from each other in the direction of movement of the counterweight. , is attached via a bracket 55a so as to be swingable in the direction of movement of the counterweight. A rail 49 is provided at the swinging end of each swinging member 55.
A pair of rollers 56 are provided that come into contact with the inner surface of the roller. Further, a single coil spring 57 is provided between the pair of swinging members 55, and both swinging members 55 are biased toward each other by the coil spring. counterweight 5
A roller 59 that contacts the inner surface of the rail 49 is rotatably attached to the other end of the roller 59 that engages with the rail 49, that is, the left end via a bracket 59a.

The pair of swinging members 55 described above, the pair of rollers 56, the coil spring 57, and the roller 59
These and related peripheral small members constitute a contact means for bringing the counterweight 50 into close contact with the rail 49, which is a guide member.

Here, the counterweight 50 is the housing 2
The housing is arranged to be tilted to the right side of the front of the housing, and is moved near the front of the housing. By arranging the counterweight 50 in this way, the combined center of gravity of the counterweight and the base 40 can be brought to the right front part of the housing 2. Due to the interaction with the center of gravity of the storage section 16, the overall weight balance of the disc playing device in the front, rear, left and right directions is good.

As shown in FIGS. 2 and 5, the base 4
0 is provided with a guide shaft 61 that extends in a direction perpendicular to the direction in which the disks are arranged in the disk storage section 16, in this case in the left-right direction. As is particularly clear in FIGS. 7 and 8, a movable chassis 64 formed by connecting two divided chassis 62 and 63 to each other is slidably attached to the guide shaft 61.

As shown in FIG. 5, a pair of toothed belt wheels 66a and 66b are rotatably provided at the right and left ends of the base 40, and a toothed belt 67 is mounted on both toothed belt wheels. has been done. A motor 68 is fixed near the right toothed belt wheel 66b via a bracket 68a, and a worm 68b fitted to the output shaft of the motor is a worm integrally formed with the toothed belt wheel 66b. wheel 66
It meshes with c. That is, the movable chassis 64 is reciprocated from side to side by the forward and reverse rotation of the motor 68.

A spindle 71 extending in a direction perpendicular to the disk arrangement direction (vertical direction) of the disk storage section 16 is rotatably attached to a movable chassis 64 consisting of two divided chassis 62 and 63 about an axis. A frame 72 bent into a substantially C-shape is fixed to the left end of the spindle 71 . The frame 72 has a pair of gripping arms 73.
and 74 are provided. These frames 72
The pair of gripping arms 73 and 74 constitute a gripping arm mechanism that grips the outer periphery of the disk 15. Note that the pair of gripping arms 73 and 74 engage with the outer periphery of the disk 15 at their respective tip ends 73a and 74a. The spindle 71 is also axially
That is, it is movable in the longitudinal direction, and also functions as a gripping rod that grips the outer periphery of the disk in cooperation with the pair of gripping arms 73 and 74. A gripping block 71a, which is a part of the spindle, is provided at the left end of the spindle 71.
engages the outer periphery of the The pair of gripping arms 73 and 74 are symmetrical with respect to the longitudinal direction of the spindle 71, which acts as a gripping rod, in two mutually non-parallel directions (directions indicated by arrows A and B in FIG. 5).
It is possible to move freely.

A gripping block 71a provided at the left end of the spindle 71 has rack portions 71a formed on both sides in the direction of movement thereof. On the other hand, the pair of gripping arms 73 and 74 are also formed with rack portions 73b and 74b, respectively. A gear 75a is provided so as to mesh with the rack portion 71b and the rack portion 73b.
A gear 75b is provided so as to mesh with the gear 75b. Each of these rack parts 71b, 73b, 74b
and gears 75a and 75b, a spindle 71 as a gripping rod and a pair of gripping arms 73,
A drive mechanism is configured to move the parts 74 in opposite directions and synchronously with each other. spindle 71
Although various other configurations are conceivable as the drive mechanism for synchronously moving the pair of gripping arms 73 and 74, it is preferable to use a simple configuration such as a gear and a rack as described above. This makes it easier to reduce costs.

Here, the tip of the spindle 71 which is the gripping rod, that is, the disk 1 of the gripping block 71a.
5 is defined as the first disc engagement point, and the engagement points of the distal ends 73a, 74a of the pair of gripping arms 73, 74 with the disc 15 are defined as the second and third disc engagement points, respectively. The distance between the second disc engagement points: La is equal to the distance between the first and third disc engagement points: Lb, and the distance between the first and second disc engagement points is equal to Lb.
and a straight line connecting the third disk engagement point forms an acute isosceles triangle. The moving direction of the gripping arm pair 73, 74 (the direction indicated by arrows A and B in FIG. 5) is approximately parallel to the straight line connecting the center of this acute isosceles triangle and the second and third disk engagement points. It is done as it is. That is, the first, second, and third disk engagement points are moved toward the center of the disk 15 being gripped.

A driving source that applies a driving force for gripping the disk to the gripping arm mechanism including the gripping arm pair 73 and 74 will be explained.

As shown in FIGS. 7 and 8, a motor 77 is fixed to the movable chassis 64 in front of a spindle 71. As shown in FIGS. Motor 77 is arranged such that its output shaft is parallel to spindle 71. A screw shaft 78 that extends parallel to the spindle is rotatably provided between the spindle 71 and the motor 77, and a gear 78a fitted to the tip of the screw shaft.
However, the gear 77a fitted to the output shaft of the motor 77
It meshes with. In addition, screw shaft 78
A screw portion 78b is provided only in the central portion. A movable bracket 79 is slidably attached to a smooth portion of the screw shaft 78 other than the screw portion 78b. A projecting portion 79a is formed on the movable bracket 79, and the movable bracket 79 is connected to the right end of the spindle 71 at the projecting portion 79a. A slider 81 is screwed into the screw portion 78b of the screw shaft 78, and is movable only in the axial direction of the screw shaft. A pair of coil springs 82a are provided between the movable bracket 79 and the slider 81.
82b are provided and each fit over the screw shaft 78. In this configuration, when the motor 77 rotates in the forward and reverse directions, the spindle 71 rotates between the gears 77a, 78a, the screw shaft 78, the slider 81, and the coil spring 82.
a, 82b, and movable bracket 79 in order to reciprocate in the axial direction. Therefore, the disk 15 is gripped and released by the gripping arm mechanism including the pair of gripping arms 73 and 74. The coil spring 82a acts as a bias force applying means that applies a bias force to the slider 81 in accordance with the movement of the slider 81 after the gripping arm mechanism grips the disk 15.

The gripping arm pair 73,
A driving source is configured to apply driving force to the gripping arm mechanism including 74.

On the other hand, a photo sensor 84 is provided near the screw shaft 78 as a detection means for detecting movement of the slider 81 after the gripping arm mechanism grips the disk 15. The above detection is performed by moving the light shielding plate 81a formed on the slider 81 within a detection gap provided on the photo sensor 84, and a signal for stopping the motor 77 is issued from the photo sensor.

The screw shaft 78 and the slider 81
, coil spring 82a, and photo sensor 8
4, the gripping arm mechanism holds the disk 1.
A stopping means is configured to stop the drive source including the motor 77 when the gripper 5 is gripped. In addition,
Apart from the photo sensor 84, this stopping means is configured as a part of the driving source, but the stopping means may be provided separately from the driving source. However, in this case, the gripping arm mechanism needs to be configured so that the drive source can apply a driving force via the slider 81 and the coil spring 82a as a bias force applying means.

The story goes back and forth, but for example, as shown in FIG. 8, the pair of gripping arms 73 and 74 have elongated holes 73d and 74d formed in the pair of gripping arms, respectively, which slide onto a pin 72a protruding from the frame 72. When the pair of gripping arms 73 and 74 grip the disk 15, the outer edges of the elongated holes 73d and 74d abut against the pin 72a and the pin 72a is moved. The gripping motion of the pair of gripping arms is regulated. That is, the elongated holes 73d, 74d and the pin 72a serve as guides for the pair of gripping arms 73, 74, and act as a regulating means for restricting the gripping operation of the gripping arm mechanism including the pair of gripping arms 73, 74 when the disc is gripped. It is.

Next, a drive source that applies rotational driving force to the spindle 71 and, therefore, to the above-mentioned gripping arm mechanism will be explained.

As shown in FIGS. 7 and 8, a movable chassis 64 made up of split chassis 62 and 63 is provided with a holding member 87 that holds a motor 86. As shown in FIGS. The holding member 87 is swingable around the spindle 71. The motor 86 is arranged such that its output shaft intersects the spindle 71. A small spindle 88 extending parallel to the spindle 71 is rotatably attached to the holding member 87. One end of this small spindle 88,
In this case, a worm wheel 88a is fitted to the right end, and the worm wheel is connected to the motor 8.
It meshes with a worm 86b fixed to the output shaft of No. 6 via a coupler 86a. Further, a gear 88b is fixed to the other end of the small spindle 88, and this gear meshes with a gear 71b fitted near the tip of the spindle 71.

Rotational driving force is applied to the spindle 71, and thus to the gripping arm mechanism, by the motor 86, coupler 86a, worm 86b, small spindle 88, worm wheel 88a, and gears 88b and 71b. A driving source is configured.

On the other hand, a projecting portion 72c (shown in the eighth figure) is provided at the right end portion of the frame 72, which is a part of the gripping arm mechanism. On the other hand, as shown in FIG.
A stopper 90 is provided correspondingly. Further, a coil spring 91 that engages with the protruding portion 72c is fitted onto the stopper 90. The overhang 72c, the stopper 90, and the coil spring 91 act as regulating means for restricting the rotation of the gripping arm mechanism when the gripping arm mechanism is rotated by the drive source and reaches a predetermined rotational position. It is configured.

The holding member 87 holding the motor 86 is caused to swing by the reaction force of the rotational driving force generated when the rotation of the gripping arm mechanism is restricted by the restriction means.

On the other hand, a photo sensor 93 serving as a detection means for detecting that the holding member 87 has oscillated is provided near the swinging end of the holding member 87 . The above detection is performed by moving the light shielding plate 87a fixed to the swinging end of the holding member 87 within the detection gap formed in the photo sensor 93, and the motor 8
A signal for stopping 6 is emitted from the photo sensor. A pin 87b is protruded from the light shielding plate 87a, and a movable piece 95 is fixed to the pin. The movable piece 95 is inserted into a guide portion 63a formed in the divided chassis 63 that forms part of the movable chassis 64, and reciprocates within the guide portion 63a as the holding member 87 swings. A pair of coil springs 96a and 96b are provided at both ends of the movable piece 95. These coil springs 96a, 96b are attached to the holding member 87.
It acts as a bias force applying means for applying a bias force to the holding member when the holding member swings.

The photo sensor 93 and the coil springs 96a and 96b serving as bias force applying means rotate the spindle 71, and therefore the gripping arm mechanism, so that the disk 15 gripped by the gripping arm mechanism is reversed. A stopping means is configured to stop the drive source including the motor 86 when this happens.

Further, the movable chassis 64 described above, a spindle 71, a gripping arm mechanism including a pair of gripping arms 73 and 74, a drive mechanism including gears 75a and 75b and synchronizing the operations of the spindle and the pair of gripping arms, and a motor 77. It includes a drive source that applies a driving force to the gripping arm mechanism for gripping the disk, and a regulating means (grip arm pair 73,
74), and a stop means that stops the drive source including the motor 77 when the gripping arm mechanism grips the disk, which is comprised of a photo sensor 84 and the like as a detection means; 86, a drive source that applies rotational driving force to the spindle 71, and thus the gripping arm mechanism; and a drive source that rotates the gripping arm mechanism by the drive source and rotates the gripping arm mechanism when it reaches a predetermined rotational position. A regulating means for regulating rotation (consisting of a stopper 90 and a coil spring 91);
When the holding member 87 holding the motor 86 and the holding arm mechanism including the photo sensor 93 rotates and the disk gripped by the holding arm mechanism is reversed, the drive source including the motor 86 is stopped. base 4 by stopping means and
A disk gripping means is provided at the disk storage section 16 so as to be movable in a direction perpendicular to the direction in which the disks are arranged in the disk storage section 16, and grips and inverts a selected disk.

As is clear from FIG. 8, the center axis of rotation of the pair of gripping arms 73, 74, that is, the center of the axis of the spindle 71, is in the moving direction of the disk gripping means, in this case the left and right direction (the direction of the arrow X and the opposite direction). direction) and forms an acute angle θa. The fact that the central axis of rotation of the pair of gripping arms 73, 74 is inclined with respect to the moving direction of the disk gripping means is related to the fact that the disk carrying unit 17 is formed as described above. By forming the disk carrying unit 17 in the above-described shape, it becomes easy to take in and take out the disk through the window provided on the left side of the front surface of the housing 2 for taking in and out the disk.

Further, as is clear from FIG. 8, a detection switch 9 acts as a detection means for detecting that the disk gripping means grips the selected disk.
9 is provided at the tip 73a of the gripping arm 73. The detection switch 99 engages with the outer periphery of the disk when the disk is gripped.

Next, a position detection means for detecting that the base 40 has reached a position where the disk gripping means can grip any disk in the disk storage portion 16 and stopping the base will be explained.

As shown in FIGS. 2 and 6, a plurality of slits are formed at the right end of the rail 49 that guides the counterweight 50, and an address plate 100 is attached that indicates the absolute address of the base 40 with respect to the housing 2 in 6 bits. It is being On the contrary,
As shown in FIG. 5, a 6-bit photo sensor 101 is provided at the right end of the base 40 in correspondence with the address plate 100. Furthermore, as shown in FIG. 4, each disk carrying unit 1
A group of 4-bit slits 102 arranged along the moving direction of the base 40, that is, the vertical direction, is integrally provided with each disk carrying unit 17 at the front end of the disk holding unit 7. A 4-bit photo sensor 103 serving as a detection means is provided at the left end of the base 40 in correspondence with the slit group 102. These address plate 100, photo sensor 101, slit group 1
02 and the photo sensor 103 constitute a position detection means for detecting that the base 40 has reached a position where the disk gripping means can grip any disk in the disk storage section 16 and stopping the base. It is being done.

As shown in FIGS. 2 and 5, the base 4
0 is attached with an address plate 105 that extends parallel to the guide shaft 61 and has slits 105a and 105b formed at both ends. On the other hand, as is particularly clear in FIG. 7, a photo sensor 106 is provided on the movable chassis 64. The address plate 105 and the photo sensor 106 constitute a position detecting means for detecting that the movable chassis 64, and therefore the disk gripping means, have reached a predetermined position and stopping the disk gripping means.

A disk presence/absence detection means for detecting the presence or absence of a disk at each disk storage position of the disk storage section 16 will be explained.

As shown in FIG. 4, a moving member 108 is provided at the front end of the upper surface of each disk carrying unit 17. As shown in FIG. A pin portion 108a is provided approximately at the center of the movable member 108, and when the pin portion engages with a support protrusion 17a formed on the disk carrying unit 17, the movable member moves in the disk arrangement direction (vertical direction). ) is able to swing freely.
When the disk 15 is positioned and carried on the disk carrying unit 17, a portion of the lower surface of the disk engages the rear end 108b of the moving member 108, thereby causing the front end 108 of the moving member 108 to
c is designed to swing upward. Furthermore, the moving member 108 is formed so that the front end thereof is heavier than the rear end thereof, centering on the pin portion 108a.
When the disk 15 is removed from the disk carrying unit 17, the front end 10 of the moving member 108
8c is configured to swing downward. The state in which the front end portion 108c is swinging downward is referred to as the first position of the moving member 108, and the state in which the front end portion 108c is
The state in which 8c is swinging upward is referred to as the second position of the moving member. That is, the moving member 108 moves between the first position and the second position depending on the presence or absence of the disk.

Aluminum foil is pasted on the surface of the front end 108c of the moving member 108 to reflect light. Fifth
As shown in the figure, the base 40 has a pair of small photo sensors 1 near the photo sensor 103.
09a and 109b are provided. These photo sensors 109a and 109b are connected to the moving member 108.
This is for detecting whether the position is at the first position or the second position. In addition, photo sensor 1
The detection by 09a and 109b is performed through a small window 17c formed in each disk carrying unit 17. The photo sensor 109a will be referred to as a first detection sensor, and the photo sensor 109b will be referred to as a second detection sensor.

The above-described moving member 108 and the photo sensor 10
9a and 109b, the disk storage section 16
A disk presence/absence detection means is configured to detect the presence or absence of a disk at each disk storage position.

Further, the disk presence/absence detection means and the base 40
, the disk gripping means including the movable chassis 64, the position detection means including the slit group 102, the counterweight 50, the rail 49,
the above-mentioned close contact means for bringing the counterweight into close contact with the rail 49; and guide shafts 36, 37;
These related peripheral small members constitute a disk ejecting and conveying mechanism that sequentially selects arbitrary disks in the disk storage section 16 and conveys them to the performance position, that is, onto the turntable 31.

Here, the pair of photo sensors 109a and 109b will be explained in detail.

First, photo sensor 1 as the first detection sensor
09a is for detecting whether the moving member 108 is in the first position or the second position when the base 40 reaches a position where the disc gripping means can grip the disc. On the other hand, the photo sensor 109b detects when the moving member 108
The photo sensor 109 is for detecting whether the photo sensor 109 is in the first position or the second position.
For example, it is provided upwardly shifted by 3 mm or more with respect to a.

As shown in FIG. 6, a bracket 110 is screwed to the left side surface of the lower end of the rail 49. As is particularly clear from FIG. 10b, a locking screw 110a is fitted into the bracket 110, and is prevented from coming off by a retaining ring 110b. The lock screw 110a is used to lock the base 40 to the housing 2 by tightening the lock screw 110a and threading it into a female threaded portion 40b protruding from the base 40. In addition,
A coil spring 110c for applying a bias force to the lock screw 110a is inserted into the lock screw 110a. A detection switch 111 is also fixed to the bracket 110 with a screw. This detection switch 111 is arranged so that when the lock screw 110a is tightened and the base 40 is locked, a portion of the lock screw 110a engages with the armature 111a of the detection switch. When the lock screw 110a is tightened and the base 40 is locked, the detection switch 111 operates,
All operations of the disc playing device are disabled.

Next, a clamping mechanism for clamping the disk conveyed onto the turntable 31 by the disk ejecting and conveying mechanism will be explained.

As shown in FIG. 2, the underbase 11
A bracket 112 is fixed above and behind the turntable 31. Figure 9 a and b
As shown in FIG. 1, a support member 113 is swingably attached to the upper end of the bracket 112 via a pin 113a. A pressing member 114 that cooperates with the turntable 31 to perform a disk clamping action is rotatably provided at one swinging end of the support member 113. Note that the disk is clamped by the pressing member 114 being attracted to the turntable 31 by magnetic force. In addition, the position indicated by the two-dot chain line in FIG. 9a is referred to as the non-clamping position of the support member 113, and
The position indicated by the solid line in is referred to as the clamp position of the support member. The swing angle θb of the support member 113 is, for example, 110°.

The geared motor 1 is located at the right end of the bracket 112.
15 is fixed. A first lever member 116 is fitted onto the output shaft 115a of the geared motor 115. The rotating end of the first lever member 116 has a pin 1 at one end of the second lever member 117.
It is rotatably attached via 17a.
The other end of this second lever member 117 is connected to the support member 1
It is pivotally attached to the other swinging end of 13 via a pin 117b. Note that the bracket 112 includes an auxiliary lever member 11 that rotates together with the first lever member 116.
A detection switch 119 is further provided for detecting completion of disk clamping by detecting the rotation angle of the auxiliary lever member.

The geared motor 115, the first lever member 116, and the second lever member 117 described above constitute a driving means for driving the support member 113. Further, the drive means and the support member 113
and the pressing member 114 constitute a clamping mechanism that constitutes a disk clamp.

FIG. 10a shows details of the slit group 102 formed in each disk carrying unit 17.

As shown in FIG. 10a, each disk carrying unit 17 has four slits 102a,
102b, 102c and 102d are formed. Four photo couplers 103a, 103b, 103 provided in a straight line on the photo sensor 103
c and 103d, the position of the base 40 with respect to each disk carrying unit 17 is detected.

Here, an address board 100, a photo sensor 10
The adjustment method of No. 1 and No. 103 will be explained below.
It should be noted that each disk carrying unit 17 that stores and carries disks has a total of 60 disks.

First, the levelness of the 4-bit photo sensor 103 is checked, and the 6-bit photo sensor 101 is adjusted horizontally. Next, the central axis of the photo sensor 103 (indicated by 103e in FIG. 10a) and the central axis 102e of the slit 102b formed in the 30th disk carrying unit 17 (as shown in FIG. 10a)
In this state, the address plate 100 is moved up and down to align the center axis of the 6-bit photo sensor 101 with the center axis of the lower bit slit of the address plate. Also, at this time, the address board 10
The position of the address plate and the photo sensor 101 in the horizontal direction is also adjusted by tilting the address plate appropriately.
Next, the central axes 103e and 2 of the photo sensor 103 are
Align the central axes 102e of the slits 102b of the 60th and 60th disk carrying units 17,
At this time, it is confirmed whether the center axis of the 6-bit photo sensor 101 matches the center axis of the slit of the lower bit of the address plate 100. Thereafter, the horizontal position of the 4-bit photo sensor 103 is aligned with the slit of the disk carrying unit 17. The adjustment is thus completed.

Next, the operation of the disk playing apparatus having the above-mentioned structure will be briefly explained along with the playing procedure with reference to FIGS. 11 and 12.

Immediately after turning on the power to the device, the control circuit 120 (first
1) determines that the mechanism is not in the transportation preparation state or the locked state (described above), and when the keyboard 7a of the music selection section 7 is operated to specify the disc to be played, the motor 44 is driven. Apply voltage and the motor starts rotating. Therefore, the base 40 moves to a position where the disk gripping means can grip the designated disk. At this time, the control circuit 120 reads the absolute address of the address plate 100 using the photo sensor 101, and also reads the slit group 102 of the disk carrying unit 17 using the photo sensor 103. The transportation preparation state is a state in which the clamper made up of the pressing member 114 and the support member 113 presses the disk onto the turntable, and the gripping arm pair 73, 74 grips the disk, that is, the photo sensor 84 and the detection switch 99, This refers to a state in which an on signal is obtained from 119.

The operation of the base 40 as the photo sensor 103 reads the slit group 102 will be described in detail.

In FIG. 10a, if the disk carrying unit 17 carrying the designated disk is the one in the center among the disk carrying units 17 drawn in three layers, then the photocouplers 103a and 103b of the photo sensor 103 are connected to the slit. 102
Photocoupler 103 corresponds to a and 102b, respectively.
When the ON signal is obtained from a, 103, the motor 44
The drive voltage supply to the base 40 is cut off, and the base 40 is stopped.

When the base 40 is stopped at a position where the disk gripping means can grip the disk, the control circuit 120 drives the motor 68 to move the disk gripping means including the movable chassis 64 toward the disk. When the photo sensor 106 confirms that the disk gripping means has moved and reached the disk gripping position, the motor 68 and therefore the disk gripping means are stopped. Next, the photo sensor 109a (shown in the fifth figure)
The presence or absence of a disk is detected by. When the presence of the disk is confirmed, the motor 77 is driven.
The disk is gripped at three points by a spindle 71, which is a gripping rod, and a pair of gripping arms 73, 74. The photo sensor 8 indicates that the disc is gripped.
4 and detection switch 99,
The motor 44 again connects the photo couplers 103b, 103.
The base 40 is rotated until an ON signal is obtained from c, and the base 40 is moved upward, for example, by about 3 mm. This 3mm
The positioning protrusion 18d fits into the disk center hole to position the disk.
The fitted state between the disk center hole and the disk center hole is released. Next, the motor 68 is rotated in the reverse direction, and the disk gripping means moves to the right while gripping the disk. When the photo sensor 106 confirms that the disc gripping means has moved a predetermined distance to the right and the gripped disc has reached directly above the turntable, the motor 68 is stopped.

After that, the base 40 is moved downward and the disc is placed on the turntable, but if the selected song is recorded on the B side of the disc, that is, the top surface when the disc is stored, the motor 86 is driven and the disk is reversed.

Here, the disk reversing operation will be described in detail.

If the selected song is on the B side of the disc, the control circuit 120 first checks whether the base 40 is above or below the position corresponding to the 50th disc from the top. When the base 40 is located below the position corresponding to the 50th disk from the top, the base 40 is raised to the position of the 49th disk from the top. Thereafter, the motor 86 is driven to reverse the disk and simultaneously lower the base. Note that the completion of the disk reversal is detected by the photo sensor 93.

When the disc is placed on the turntable,
The geared motor 115 rotates to clamp the disk. When the detection switch 119 detects that the disk is clamped, the disk gripping state by the disk gripping means is released. In this way, it becomes possible to play, and the spindle motor 32, optical pickup 33, etc. are activated to start playing.

When the performance is finished, the disc is returned to its original storage position by reversing the process described above.

Thereafter, the above operation is repeated according to the designated number of songs.

FIG. 13 is a flowchart illustrating an example of a program stored and executed in control circuit 120 to take action when the transportation lock mechanism is in the locked state immediately after power is turned on. That is, in the subroutine shown in this flowchart, when power is detected to be turned on and the ON state of the lock detection switch 111 is known, the door lock mechanism (not shown) that engages the opening/closing door 3 is released. Further, in this case, the opening/closing door 3 may be automatically opened to prompt the operator to release the lock. When the transportation lock is released and the detection switch 111 is turned off, the control circuit enters a step to execute the next operating mode.

Effects As is clear from the above, in the disk selection performance device according to the present invention, the detection switch detects whether or not the transport lock is released immediately after the power is turned on, and if the transport lock is applied, the casing is locked. The structure is such that the door is automatically opened or the door lock is released to prompt release of the transportation lock, which prevents mechanical parts from being damaged or the motor from overheating due to erroneous operation.

[Brief explanation of the drawing]

FIG. 1 is a front view of a disc playing device according to the present invention, FIG. 2 is an overall perspective view of the internal structure of the disc playing device, FIGS. 3 and 4 are detailed perspective views of the disc storage section, and FIG. 5 6 is a perspective view showing the base and its peripheral members, FIG. 7 is a detailed perspective view of the disk gripping means for gripping the disk, FIG. 8 is a plan view including a partial cross section of the disk gripping means, and FIG. 9 Figures a and b are a side view and a rear view of the clamp mechanism, respectively; Figure 10a is a diagram for explaining the slit and detection sensor formed in the disk carrying unit which is a component of the disk storage section; Figure 10 b
11 is a diagram showing the configuration of the drive control system in the disc playing device, FIG. 12 is a flowchart for explaining the operation of the disc playing device, and FIG. 13 is a detailed diagram of a part of the internal structure. 1 is a flowchart illustrating a mode of operation for facilitating release of a transport lock of a disc selection/playing device according to the present invention; Explanation of symbols of main parts, 1...Disk performance device, 2...Housing, 3...Door, 3a...Glass plate, 5...Operation section, 6...Adjustment section, 7...Track selection section, 8... ... Coin receiver, 10 ... Caster, 1
1...Underbase, 12...Frame, 15
...Disk, 16...Disk storage section, 17...
...Disk carrying unit, 17a...Support protrusion,
17c...Small window, 18...Plate member, 18c...
Semicircular disk storage section, 18d... Positioning protrusion, 18e... Vertex portion, 20, 21, 22...
Shaft, 20a...first threaded part, 20b...second threaded part, 24...receiving plate, 24a...stop ring, 25...pressing plate, 26...nut, 26a...washer, 27, 41d, 57,82
a, 82b, 91, 96a, 96b...Coil spring, 29...Upper base, 29a, 4
3a, 55a, 59a, 68a, 110, 112
... Bracket, 29b, 43b, 88 ... Small spindle, 29c, 43c, 43d, 44b, 6
6a, 66b...Toothed belt wheel, 31...Turntable, 32...Spindle motor, 33...
Optical pick-up, 36, 37, 61... Guide shaft, 40... Base, 40a... Cylindrical portion, 41a, 41b, 56, 59... Roller, 4
1c... Lever, 44, 68, 77, 86... Motor, 44a... Fixed plate, 46, 47, 6
7...Toothed belt, 49...Rail, 50...Counterweight, 51, 52...Pulley, 53...
... wire, 55 ... swinging member, 62, 63 ... divided chassis, 63a ... guide section, 64 ... movable chassis, 66c, 88a ... worm wheel, 68b, 86b ... worm, 71 ... spindle, 71a...Gripping block, 71b, 75
a, 75b, 77a, 78a, 88b...gear,
72...Frame, 72a, 87b, 113a,
117a...pin, 72c, 79a...projection,
73, 74...Gripping arm, 73a, 74a...
Tip part, 73b, 74b...Rack part, 73d,
74d...long hole, 78...screw shaft,
78b... Screw part, 79... Movable bracket, 81... Slider, 81a, 87a... Light shielding plate, 84, 93, 101, 103, 106, 1
09a, 109b...Photo sensor, 86a...
Coupler, 87... Holding member, 90... Stopper,
95...Movable piece, 99,111,119...Detection switch, 100,105...Address board, 10
2...Slit group, 102a, 102b, 102
c, 102d, 105a, 105b...slit, 103a, 103b, 103c, 103d...
...Photocoupler, 103e... Central axis, 108...
...Moving member, 108a...Pin part, 108b...
Rear end, 108c...front end, 110a...lock screw, 113...support member, 114...pressing member, 115...geared motor, 115a...output shaft, 116...first lever member, 117... Second lever member, 118...Auxiliary lever member, 12
0...Control circuit.

Claims (1)

[Claims] 1. A disk storage section that can sequentially arrange and store a plurality of disks, a disk playing means, and a disk transport mechanism that transports a designated disk between the disk storage section and the disk playing means in response to a control signal; a control means for supplying a control signal to the disk playing means and the transport mechanism in response to a playing command to perform the specified disk;
A disc selection playing device comprising a casing surrounding at least the disc storage section, the disc playing means, and the disk transport mechanism, the casing comprising an opening/closing door provided in a room near the disc storage section and the opening/closing door. The casing includes a mechanical locking means for the disk transport mechanism and a lock detection switch that indicates the locked state of the mechanical locking means, and the control means is configured to lock the disk immediately after power is turned on. 1. A disk selection performance device characterized in that when an operation of a lock detection switch is detected, the door lock mechanism is opened to enable the opening/closing door to be opened.