JPS60256962A - Disc playing device - Google Patents

Abstract

PURPOSE:To avoid waste of time for disc playing by providing a moving member moved between two positions in response to the presence of a disc and two sensors detecting the position to quicken the detection. CONSTITUTION:The lower face of the disc positioned to a disc carrying unit 7 to shake a moving member front end 108c upward to the 2nd position, extracts the disc and shake the end downward to the 1st position, a photosensor provided with a base carrying the disc grip member and moved vertically detects either the 1st or the 2nd position to detect the presence of the disc. In storing the disc after the end of playing onto the unit 17, in order to avoid the engagement between a projection 18d and the disc outer peripheral, the 1st and 2nd positions moved upward for a prescribed distance are detected by the 2nd sensor. Thus, the presence of the disc is detected quickly and it is possible to avoid the waste of time for disc playing.

Description

Detailed Description of the Invention Technical Field The present invention relates to a disc playing device, and more particularly to a disc playing device that can store a plurality of discs and can sequentially select any of the stored discs for continuous performance. Zuru. BACKGROUND ART Various disc playing devices capable of playing a plurality of discs in succession have already been proposed and used, but basically a disc playing device that can sequentially arrange and store a plurality of discs at a predetermined pitch is used. and a disc playing means including a turntable, a pickup, etc., and a disc ejecting and transporting means for sequentially selecting and grasping any discs in the disc storage section and transporting them to the playing position, that is, onto the turntable. I! It has a structure. This disk ejecting and conveying mechanism usually includes a base that moves along the disk arrangement direction of the disk storage section, and a disk grip that is provided on the base so as to be movable in a direction substantially perpendicular to the disk arrangement direction and that grips a selected disk. and disk presence/absence detection means for detecting the presence or absence of a disk at each disk storage position of the disk storage section. In previously proposed disc playing devices, the disc presence/absence detecting means is configured to detect the presence or absence of a disc based on a difference in the town stroke of a tone arm, which is a component of the pickup. That is, this method takes advantage of the fact that the amount of down of the arms 1 to 1 when the turntable 1 has no disk on its platform is greater than when the disk is on the turntable. However, in the disk presence/absence detection device having such a configuration, the presence or absence of the disk cannot be detected until the disk is conveyed onto the turntable. Therefore, when playing several discs in succession, even if the disc to be played is not in the disc storage position, the disc ejecting and transporting mechanism performs the transport operation, and the disc is placed in the next disc storage position. The drawback was that time was wasted before playing the disc. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and its purpose is to provide a disc playing device in which the presence or absence of a disc can be quickly detected, and therefore no time is wasted in playing the disc. It is to be. A disc playing device according to the present invention includes: a disc storage unit that can sequentially arrange and store a plurality of discs; a disc playing unit; and a disc ejecting and transporting mechanism that sequentially selects and transports arbitrary discs in the disc storage unit to a playing position. The disk ejecting and conveying mechanism includes a base movable along the disk arrangement direction of the disk storage section, and a base movable in a direction substantially perpendicular to the disk arrangement direction to grip the selected disk. and 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, and each disk storage position has a disk holding means that protrudes in the disk arrangement direction and fits into the disk center hole. A positioning protrusion is provided that positions the storage disk by mating, and the disk ejecting and conveying mechanism moves the disk a predetermined distance in the disk arrangement direction to release the fitted state between the disk center hole and the positioning protrusion. Later, the disc is played, and the disc presence/absence detection means is a movable member that is provided in the disc storage section corresponding to each of the disc storage positions and moves between a first position and a second position depending on the presence or absence of the disc. and a first detection for detecting whether the movable member is in the first position or the second position when the base moves together with the base and reaches a position where the disc gripping means can grip the disc. a sensor, and the movable member moves together with the base so that when the base moves by the predetermined distance from a position where the disc gripping means can grip the disc, the moving member is in either the first position or the second position. It is characterized by comprising a second detection sensor that detects the Support 1 Hereinafter, a disc playing device according to embodiment C of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 designates the entire disc playing device which prepares a plurality of information recording discs such as video discs and plays the discs 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, for inserting and removing a disk into 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, which is indicated by the arrow X. Further, the direction of arrow Z is upward. The window for loading and unloading the disc is formed over substantially the entire length of the housing 2 in the vertical direction, and a door 3 is provided to close the window. Almost the entire surface of the door 3 is made of a transparent glass plate 38, etc.
The mechanism within the housing 2 is visible 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. Further, on the bottom surface of the housing 2, a key star 10 is provided 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 has a lightweight chevron t
Consists of I4 etc. Inside the housing 2, behind the disk loading/unloading window, that is, on the rear left side of the housing, a disk storage section 16 is provided in which a plurality of disks 15 can be sequentially arranged and stored at a predetermined pitch. In this case, the plurality of disks 15 are arranged and housed vertically (in the direction of arrow Z and in 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
On the right is 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.
are two mutually perpendicular sides 18a, '18. Each disk 15 has a disk center hole in a positioning protrusion 18d protruding from the main surface of the plate member. They are positioned and stored by fitting. In order to reduce the weight of this plate member 18, the vertex portions 18e of the two sides 18a and 18b are cut into a substantially triangular shape. As is clear from the figure, the respective extensions of the two sides 18a and 18b and the extension of the diameter of the semicircular disk storage portion 18c form a right triangle. A single shirt h 20 is fitted into each disk carrying unit 17 at 83 near the vertices of the two sides 18a, 18b. In addition, each disk holding unit 17 has Qgi on two sides 18a and 18b.
A pair of shafts 21 and 22 are fitted near the portion a5, respectively. As shown in FIG. 2, each shaft 20.
21 and 22 are fixed to the underbase 11 at the lower end portion d3. Each of these shafts 20, 21 and 22
This constitutes a slip prevention means that prevents each disk carrying unit 17 from slipping. As shown in FIG. 4, each disk carrying unit 17
are stacked on a receiving plate 24 provided near the lower ends of the shafts 20, 21 and 22. This receiving plate 24 is fitted onto each shaft 20, 21, 22, and its downward movement is restricted by three retaining rings 24a. As shown in FIG. 3, a presser plate 25 is provided on each stacked disk carrying unit 17 to fit onto the shafts 20, 21, 22. For example, the first threaded portion 20 at the upper end of the shaft 20
A nut 26 is screwed into a. Nuts 26 are similarly screwed into the upper ends of the other shafts 21 and 22. Nut 26 and presser play 1-
A coil spring 27 is compressed between the coil spring 25 and the coil spring 25 with a washer 278 interposed therebetween. The plate 24, the holding plate 25, the nut 26, the coil spring 27, and peripheral small members related thereto constitute a suppressing means for pressing each disk carrying unit 17 in the stacking direction. Note 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 from FIG. 2, an upper base 29 is provided further above the presser plate 25 provided above each of the stacked disk supporting units 17. J: Attach the nut 30 to the second threaded portion 20b (shown in the third figure) formed at the top end.
It is fixed. As shown in FIG. 2, a disc playing means for playing a disc, including a turntable 31, a spindle motor 32, an optical pickup 33, etc., is arranged approximately at the center of the underbase 11. This disk playing means was developed by the applicant, for example, in U.S. Pat. No. 58-169560.
It has substantially the same configuration as the disc playing means included in the front-loading disc player that was filed in 1999, and its specific configuration will not be described in detail here. Next, a description will be given of a disk ejecting and conveying mechanism for sequentially selecting an arbitrary disk from among the plurality of disks 15 arranged and stored in the disk storage section 16 and conveying the selected disk to the performance position, that is, onto the turntable 31. As shown in FIG. 2, guide shafts 36 and 37 are provided as a pair of guide members extending along the disk arrangement direction of the disk storage section 16, that is, in the vertical direction.
The underbase 11 is
is fixed. Also, both guide shafts 36.37
The upper end part of is fixed to the upper base 29. A base 40 is slidably attached to both guide shafts 36, 37. Both guide shafts 36 and 37 extend 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 discs is provided. As is clear from FIG. 5, the base 40 is formed as a single straight bar as a whole. To describe in detail how the base 40 is attached to each of the guide shafts 36 and 37, the base is slidably and tightly fitted onto the guide shaft 37 at a cylindrical portion 40a provided approximately in the center in the longitudinal direction of the base. and a pair of rollers 41a made of ball bearings etc. at the left end.
It is slidably engaged with the guide shaft 36 via 41b. Among the pair of rollers, the front roller 4
1a 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 by a coil spring 41d in a direction in which the roller 41a approaches the guide shaft 36. As is particularly clear in Figure 6, underbase 1
1 has a small spindle 43 via a bracket 4.38.
b is rotatably provided, and a pair of toothed belt pulleys 43C and 43d are fitted to both ends of the small spindle, respectively. A motor 44 is fixedly installed near the bracket 43a via a fixing plate 44a, and a toothed belt pulley 44b and a toothed belt pulley 43d fitted on the output shaft of the motor have teeth. A belt 46 is installed. On the other hand, a toothed belt pulley 29C is also rotatably attached to the upper base 29 via a bracket 29a and a small spindle 29b, and a toothed belt 47 is installed between the toothed belt pulley 29C and the toothed belt pulley 43C. has been done. A part of the tooth (-1 belt 47) is fixed to the base 40. In other words, the base 40 is reciprocated up and down as the motor 44 rotates forward and backward. As shown in FIG. 6, a rail 49 as a guide member is provided in front of the base 40 in parallel with the guide shaft 37.The rail 49 has a substantially C-shaped cross section perpendicular to its longitudinal direction. A counterweight 50 is fitted into the inner space of the rail so as to be movable in the vertical direction.As is clear from FIG.
A pair of pulleys 51 are provided at each of the upper and lower ends.
It is connected to the base 40 by a wire 53 installed between the wires 52 . In other words, the counterweight 50 is guided by four rails to move relative to the base 40. As shown in FIG.
A pair of swinging members 55 are provided at one end of engagement with the rail 49, that is, the right end, and are spaced apart from each other in the direction of movement of the counterweight, and are swingable in the direction of movement of the counterweight. It is attached via a bracket 55a. A pair of rollers 56 that come into contact with the inner surface of the rail 49 are provided at the swinging end of each swinging member 55. Further, a single coil spring 57 is installed between the pair of swinging members 55, and both swinging members 55
are urged toward each other by the coil spring. A roller 59 that contacts the inner surface of the rail 49 is rotatably attached to the other end of the counterweight 50 that engages with the rail 49, that is, the left end, via a bracket 59a. A pair of swinging members 55 described above, a pair of rollers 56,
The coil spring 57, the roller 59, and the peripheral small members related thereto constitute a means for bringing the counterweight 50 into close contact with the rail 49, which is a guide member. Here, the counterweight 50 is arranged to be biased to the right side of the front surface of the housing 2, and is configured to move near the front surface of the housing 2. 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 position 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 40 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 beams and beams 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 attached to both toothed belt wheels. There are overhead wires. 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 integrally formed with the toothed belt wheel 66b. It meshes with the A-mm wheel 66C. In other words, the movable chassis 64 is reciprocated from side to side by the forward and reverse rotation of the motor 68. Movable chassis 6 consisting of two split chassis 62, 63
A spindle 71 extending in a direction perpendicular to the disk arrangement direction (up-down direction) of the disk storage section 16 is rotatably attached to the spindle 4 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 is provided with a pair of gripping arms 73 and 74. 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 have respective tip portions 73a and 74.
It engages with the outer periphery of the disk 15 at point a. spindle 71
is also movable in its axial or longitudinal direction and acts as a gripping rod that grips the outer periphery of the disk in cooperation with the pair of gripping arms 73, 74. A gripping block 71a forming a part of the spindle is provided at the left end of the spindle 71, and the spindle 71 engages with the outer periphery of the disk 15 at the gripping block 71a. 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, and are movable in two mutually non-parallel directions (directions indicated by arrows Δ and B in FIG. 5). A gripping block 71 provided at the left end of the spindle 71
a has rack portions 71a on both sides in the direction of movement.
is formed. 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, and a gear 75b is provided so as to mesh with the rack portion 71b and the rack portion 74b. Each of these rack parts 71b, 73b, 74b,
The gears 75a and 75b constitute a drive mechanism for moving the spindle 71 as a gripping rod and the pair of gripping arms 73, 74 in mutually opposite directions and synchronously. Various other configurations are conceivable as the drive mechanism for synchronously moving the spindle 71 and the gripping arm pair 73, 74, but the drive mechanism may be a simple one such as a gear or a rack as described above. By changing the configuration, it is easier to reduce costs. Here, the tip of the spindle 71 serving as the gripping rod, that is, the engagement point of the gripping block 71a with the disk 15 is defined as the first disk engagement point, and the engagement of the tip portions 73a, 74a of the pair of gripping arms 73, 74 with the disk 15 is defined as the first disk engagement point. If the engagement points are the second and third disk engagement points, respectively, then the first. The distance between the second disc engagement points: La is the distance between the first and second disc engagement points. The distance between the third disc engagement points is equal to Lb, and the distance between the third disc engagement points is equal to Lb. A straight line connecting the second and third disc engagement points forms an acute isosceles triangle. Movement direction of gripping arm pair 73°74 (direction shown by arrows A and B in FIG. 5)
is the center of this acute isosceles triangle and the second . It is arranged to be substantially parallel to a straight line connecting the third disc engagement point. That is, the above 1. The second and third disc engagement points are configured to move toward the center of the disc 15 being gripped. The above-mentioned gripping arm 1. includes a pair of gripping arms 73, 74. - The drive source that provides the drive force for gripping the disk to the mechanism 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. The output shaft of the motor 77 is the spindle 7.
It is arranged parallel to 1. spindle 71
A screw shaft 78 extending parallel to the spindle is rotatably provided between and the motor 77, and a gear 78a fitted to the tip of the screw shaft is attached to the output shaft of the motor 77. The gear 77a meshes with the gear 77a. Note that the screw shaft 78 is provided with a screw portion 78b only in its 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 and 82b are provided between the movable bracket 79 and the slider 81, and each is fitted onto the screw shaft 78. In this configuration, the spindle 71 rotates between the gears 77a, 78a, the screw shaft 78, the slider 81 . Coil spring 82a. 82b and movable bracket 79 are sequentially valved to reciprocate in the axial direction. Therefore gripping arm pair 73.7
The disk 15 is gripped and released by the gripping arm mechanism including the gripping arm mechanism 4. Note that the coil spring 82a acts as a bias scar applying means for applying a bias scar to the slider according to the movement of the slider 81 after the gripping arm mechanism grips the disk 15. The above-described motor 77, gear 77a, screw shaft 78, gear 78a, movable bracket 79, slider 81, coil springs 82a, 82b, and the above-mentioned gripping arm including the gripping arm pair 73° 74 A driving source is configured to apply driving force to the mechanism. On the other hand, a photosensor 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 the detection gap provided on the photosensor 84, and a signal for stopping the motor 77 is generated from the photosensor. The screw shaft 78, slider 81, coil spring 8'2a, and photosensor 84 constitute a stopping means that stops the drive source including the motor 77 when the gripping arm mechanism grips the disk 15. has been done. Note that, apart from the photosensor 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 above-mentioned gripping arm mechanism includes the slider 81 and the coil spring 82a as the pie-scar applying means.
It is necessary to be able to apply driving force to the drive source via the drive source. 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, and slide into a bottle 72a protruding from the frame 72. When the pair of gripping arms 73 and 74 grips the disc 15, the outer edges of the long holes 73d and 74d come into contact with the bottle 72a and the gripping arms 73 and 74 are moved freely. The gripping motion of the arm pair is regulated. That is, the long holes 73d and 74d and the bottle 72
A serves as a guide for the pair of gripping arms 73 and 74, and also acts as a regulating means ( ) that restricts the gripping operation of the gripping arm mechanism including the pair of gripping arms 73 and 74 in the disc gripping state. 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, the split chassis 62
．． A holding member 87 holding a motor 86 is provided on the movable chassis 64 made up of the motor 63. The holding member 87 is swingable around the spindle 71. The motor 86 is arranged such that its output shaft intersects the spindle 71. The spindle 7 is attached to the holding member 87.
A small spindle 88 extending parallel to 1 is rotatably attached. A worm wheel 88a is fitted to one end of the small spindle 88, in this case the right end, and the worm wheel meshes with an A-m 86b fixed to the output shaft of the motor 86 via a coupler 86a. ing. 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. The above motor 86, coupler 86a, and worm 86
b, the small spindle 88, the worm wheel 88a, and the gears 88b and 7To constitute a drive source that applies rotational driving force to the spindle 71 and, therefore, to the gripping arm mechanism. 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. 7, the split chassis 63 is provided with a stopper 90 corresponding to the overhang 72c. Further, this stopper 90 has an overhanging portion 72.
A coil spring 91 that engages with c is fitted onto the outside. These overhang portion 72C1 stopper 90 and coil spring 91 constitute a regulating means for regulating the rotation of the gripping arm mechanism when the gripping arm mechanism is rotated by the drive source and reaches a predetermined rotational position. There is. 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 photosensor 93 is provided near the swing #ii portion of the holding member 87 as a detection means for detecting that the holding member swings. The above detection is performed by the light shielding plate 87a fixed to the swinging end of the holding member 87 moving within the detection gap formed in the photosensor 93, and a signal for stopping the motor 86 is sent to the photosensor. emanates from. This light shielding plate 87a includes a bottle 87.
b is provided in a protruding manner, and a rotatable member 95 is fixed to the bottle. The movable piece 95 is inserted into a guide portion 3a formed in the divided chassis 63 by stroking a part of the movable chassis 64, and reciprocates within this guide portion 3a as the holding member 87 swings. do. A pair of coil springs 96a are provided at both ends of the movable piece 95.
, 96b are provided. These coil springs 9
6a and 96b act as a bias scar applying means for applying a bias scar to the holding member 87 when the holding member 87 swings. The disk 15 gripped by the spindle 71 and therefore the gripping arm mechanism is rotated by the photosensor 93 and the coil springs 96a and 96b serving as the bias applying means.
A stopping means is configured to stop the drive source including the motor 86 when the motor 86 is reversed. In addition, the above-mentioned movable chassis 6/I and the spindle 71
and a gripping arm mechanism including a gripping arm pair 73.74;
a drive mechanism that includes gears 75a and 75b and synchronizes the operations of the spindle and the pair of gripping arms; a drive source that includes a motor 77 that applies a driving force to the gripping arm mechanism for gripping the disk; and a drive mechanism for gripping the gripping arm mechanism. A regulating means (gripping arm pair 73
a long hole 736, 74d, etc. provided at the angle 74; and a stopping means, which is comprised of a photosensor 84, etc. as a detection means, and stops the drive source including the motor 77 when the gripping arm mechanism grips the disk; A drive source that includes a motor 86 and applies rotational driving force to the spindle 71 and thus the gripping arm mechanism; A regulating means (stopper 90)
and a coil spring 91), and a motor 86.
a holding member 87 that holds a holding member 87; and a stopping means that stops the drive source including the motor 86 when the disk gripped by the gripping arm mechanism including the photosensor 93 rotates and the disc gripped by the gripping arm mechanism is reversed. This constitutes a disk gripping means that is movably provided on the base 40 in a direction perpendicular to the direction in which the disks are arranged in the disk storage section 16, and that grips and inverts a selected disk. Here, as is clear from FIG. 8, the pair of gripping arms 73
．． 74, that is, the axial center of the spindle 71, is in the moving direction of the disk gripping means, in this case the left-right direction (
It forms an acute angle θa with respect to the arrow X direction and the opposite direction). This tilting of the center axis of rotation of the pair of gripping arms 73, 74 with respect to the direction of movement 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 is easy to take in and take out the disk through the window provided on the front left side of the housing 2 for taking in and out the disk. Further, as is clear from FIG. 8, a detection switch 99 is provided at the tip 73a of the gripping arm 73, which acts as a detection means for detecting that the disc gripping means has gripped the selected disc. 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 described. As shown in FIGS. 2 and 6, a plurality of slits are formed at the right end of the rail 49 for guiding the counterweight 50, and an address plate 100 is provided which indicates the absolute address of the base 40 with respect to the housing 2 in 6 bits. installed. On the other hand, as shown in FIG. 5, a 6-bit photosensor IC 1 is provided at the right end of the base 40 in correspondence with the address plate 100. Also, the fourth
As shown in the figure, a group of 4-bit slits 102 arranged along the moving direction of the base 40, that is, the vertical direction, is integrally provided at the front end of each disk carrying unit 17. ing. At the left end of the base 40, a 4-bit 7A sensor 103 'IJ' WQ serving as a detection means is provided corresponding to the slit group 102. These address boards 100, Photoren+11
01. Position detection for detecting by the slit group 102 and photosensor 103 that the base 40 has reached a position where the disc holding means can grip any disc in the disc storage section 16 and stopping the base. The means are constructed. As shown in FIGS. 2 and 5, the base 40 has a length extending parallel to the guide shaft 61, and slits 1 at both ends.
An address plate 105 on which 05.1.105b is formed is attached. On the other hand, as is particularly clear in FIG.
06 is provided. The address plate 105 and the photo sensor 06 constitute a position detecting means for detecting that the movable chassis 64, and thus the disc gripping means, has reached a predetermined position and stopping the disc gripping means. . A disk presence/absence detection means for detecting the presence or absence of a disk inserted into each disk storage position of the disk storage section 16 will be explained. As shown in FIG.
A moving member 108 is provided at the front end of the upper surface. A bin part 108a is provided approximately at the center of the moving member 108, and when the bin part engages with a support protrusion 17a formed on the disk carrying unit 17, the moving member 108 moves up and down in the disk arrangement direction. direction). When the disk 15 is positioned and supported on the disk carrying unit 17, a portion of the lower surface of the disk engages with the rear end 108b of the moving member 108, thereby causing the front end 108C of the moving member 108 to move upward. It is designed to oscillate. Moreover, the moving member 108 is a bottle part 108 a
The front end is heavier than the rear end with respect to the disk holding unit 17.
5 is removed, the front end 10 of the moving member 108
8C is configured to swing downward. The state in which the front end 108C swings downward is referred to as the first position of the movable member 108, and the state in which the front end 108C swings upward is referred to as the second position of the movable 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. The surface of the front end 108C of the moving member 108 is
Aluminum foil is attached to protect it. As shown in FIG. 5, a pair of small photosensors 109a and 109b are provided on the base 40 near the photosensor 103. These photosensors 109a and 109b are for detecting whether the moving member 108 is in the first position or the second position. The detection by the photosensors 109a and 109b is performed through small windows 17c formed in each of the disk carrying units 1-17. The photosensor 109a will be referred to as a first detection sensor, and the photosensor 109b will be referred to as a second detection sensor. The above-mentioned moving member 108 and photosensors 109a, 1
'09b constitutes 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. Further, the disk presence/absence detecting means, the base 40, the movable chassis 64, etc.-1 Nice gripping means, the position detecting means including the slit group 102, the counterweight 50, the rail 49, and the counterweight By means of the above-mentioned contact means for bringing the discs into close contact with the rails 49, the guide shafts 36 and 37, and small peripheral members related thereto, arbitrary defrosts in the disc storage section 16 are sequentially selected and moved to the playing position, that is, the turntable 31. A disk ejecting and conveying mechanism for conveying the disk upward is configured. Here, the pair of photosensors 109a and 109b
1. First, the photosensor 109a as a first detection sensor moves the movable member 108 to the first position and the second position when the base 40 reaches a position where the disc gripping means can grip the disc. The purpose is to detect which of the following. On the other hand, when the base 40 is moving a predetermined distance upward from the position where the disc gripping means can grip the disc, the photo sensor 109b
It is for detecting whether it is in the first position or the second position, and is provided to be shifted upward by, for example, 3 mm or more with respect to the sensor 109a. As shown in FIG. 6, a bracket 110 is screwed to the left side surface of the upper end of the rail 49. As shown in FIG. Figure 110 (
As is particularly clear from b), the bracket 110 is fitted with a locking screw 110a and a retaining ring 110b.
Remove the lock screw (lock screw 110).
A is for locking the base 40 to the housing 2 by tightening it and screwing it into a female screw portion 40b protruding from the base 40. In addition,
A coil spring 110C is fitted into the lock screw 110a to provide a tension to the lock screw. A detection switch 111 is also fixed to the bracket 110 with a screw. This detection switch 1/1,
When the lock screw 1"lOa is tightened and the base 40 is locked, a part of the lock screw is arranged to engage with the armature V111a of the detection switch. When the lock screw 110a is tightened, the base 40 is locked. When the disc is locked, a detection switch 111 is activated to prevent any operation of the disc playing device.Next, the disc is transported onto the turntable 31 by the disc ejecting and transporting mechanism. A clamp mechanism for clamping the turntable 31 will be explained. As shown in FIG. 2, a bracket 112 is fixed on the underbase 11 and behind the turntable 31. )), a support member 113 is swingably attached to the upper end of the bracket 112 via a bottle 113a.A turntable 31 is attached to one swing end of the support member 113.
A pressing member 114 that performs a disc clamping action in cooperation with
is rotatably provided. Note that the disk is clamped by the pressing member 114 being attracted to the turntable 31 by magnetic force. Further, the position indicated by the two-dot chain line in FIG. 9(a) is referred to as the unclamped position of the support member 113, and the position indicated by the solid line in FIG. 9(a) is the clamped position of the support member 113. It is called. The swing angle of the support member 113; θb is, for example, 1106. A geared motor 115 is fixed to the right end of the bracket 112. Output shaft 115a of geared motor 115
A first louver member 116 is fitted into the holder. A second lever member 117 is rotatably attached to the rotating end of the first lever member 116 via a pin 117a. The other end of the second lever member 117 is pivotally connected to the other swinging end of the support member 113 via a pin 117b. Note that the bracket 112 is provided with an auxiliary lever member 118 that rotates together with the first lever member 116, and furthermore, by detecting the rotation angle of the auxiliary lever member, completion of disk clamping is detected. detection switch 11
9 is provided. The above geared motor 115 and the first lever member 116
and the second lever member 117, the support member 113
A driving means for driving is configured. Furthermore, by the driving means, the supporting member 113, and the pressing member 114,
Clamp II that forms a disk clamp! lft is configured. FIG. 10(a) shows details of the slit group 102 formed in each disk-carrying unit 17. As shown in FIG. 10(a), each disk carrying unit 17 has four slits 102a. 102b, 102c and 102d are formed. Four photocouplers 103a, 103b, 103C and 103d are provided in a straight line on the photosensor 103.
base 4 for each disk carrying unit 17 by
The position of 0 is detected. Here, the address board 100, the photosensors 101 and 1
The adjustment method of 03 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. 10(a)
) and the slots formed at 17 to the 30th disk holding unit 1/1 to 102 b
102e (shown in FIG. 10(a)), and in this state, lower the address plate 100 to align the center axis of the 6-bit photosensor 101 with the center axis of the lower bit slit of the address plate. Match with. Also, this Togi,
The position of the address plate 100 and the photo sensor 101 in the horizontal direction is also adjusted by appropriately tilting the address plate 100. Next, the center of the photosensor 103 @II 103e
and the center axis 102e of the slit 1021) of the second and 60th disk holding unit 17, and at this time, the center axis of the 6-bit photosensor 101 is aligned with the center axis of the slit of the lower bit of the address plate 100. Check if they match. After this, the 4-bit photosensor 10
3 to match the slit of the disk carrying unit 17. The adjustment is thus completed. Next, the operation of the disk playing device having the above-mentioned configuration will be explained as follows.
The performance procedure will be briefly explained with reference to the figures and FIG. 12. Immediately after the power is turned on to the 5A unit, the control circuit 120 (shown in Figure 11) sets the mechanical section to the transport preparation state or the locked state (described above).
When it is determined that the disc to be played is designated by operating the keyboard 7a of the music selection section 7, a driving voltage is supplied to the motor 44, and the motor starts rotating. Therefore, the base 40 and the disk gripping means □
Move to a position where you can grasp the specified disc. At this time, the control circuit 120 uses the photo range 101 to read the absolute address on the address plate 100, and uses the photo sensor 103 to read the slit group 102 of the disk carrying unit 17. Note that the transportation preparation state means that the clamper consisting of the pressing member 114 and the supporting member 113 presses the disc onto the turntable and the pair of gripping arms 73
．． 74 grips the disk, that is, a state in which an ON signal is obtained from the photosensor 84 and the detection switch 99.1'19. The operation of the base 40 in conjunction with the reading of the slit group 102 by the sensor 11 to the sensor 103 will be described in detail. In FIG. 10(a), if the disk carrying unit 17 that carries a designated disk is the one in the center among the three-tiered disk carrying units 17, then the photocoupler 103a of the photosensor 103 ,
When the slits 103b match the slits 102a and 102b, and an ON signal is obtained from the photocouplers 103a and 103b, the drive voltage supply to the motor 44 is cut off, and the base 40
is forced to stop. 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 and the disk gripping means including the movable chassis 64 moves toward the disk. When the disc gripping means moves and reaches the disc gripping position, a photo sensor 10.6 detects that the disc gripping means has moved and reached the disc gripping position.
When this is confirmed, the motor 68 and therefore the disk gripping means are stopped. Next, the presence or absence of a disc is detected by the photosensor 109a (shown in FIG. 5). When the presence of the disk is confirmed, the motor 77 is driven, and the disk is moved between the spindle 71, which is a gripping rod, and the pair of gripping arms 73.
74 and is gripped at three points. When the photosensor 84 and the detection switch 99 detect that the disk is gripped, the motor 44 is activated again by the photocoupler 10.
3b, rotated until an on signal was obtained from 103G. The base 40 moves upward by, for example, about 3 mm. By this movement of 3 mm, the fitted state between the positioning protrusion 18d, which is fitted into the disk center hole to position the disk, and the disk center hole is released. Next, the motor 68 is rotated in the reverse direction, and the disc gripping means moves to the right while gripping the disc. 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 just above the turn table, the motor 68 is stopped. After that, the base 40 is moved downward and the disc is placed on the turntable.If the selected song is recorded on the 8th side of the disc, that is, the top side when the disc is stored, the motor 86 is driven and the disk is reversed. Here, the disc reversing operation will be described in detail. If the selected song is on the 8th side of the disc, the control circuit 12
0 first confirms whether the base 40 is located in the -L direction or below the position corresponding to the 50th disk from the top. When the base 40 is located below the position corresponding to the 50th disc from the top, the base 40 is raised to the position of the 49th disc from the top. after that. The motor 86 is driven to reverse the disk and simultaneously lower the base. Note that the photosensor 93 detects that the disk reversal is completed. When the disc is placed on the turntable, the geared motor 115 rotates to clamp the disc. When the detection switch 119 detects that the disc is clamped, the disc gripping state by the disc 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 stored in its original storage position by following the above process in reverse. Thereafter, the above operation is repeated according to the designated number of songs. Effects As detailed above, in the disc playing device according to the present invention, the disc presence/absence detection means for detecting the presence or absence of a disc at each disc storage position of the disc storage section (16) is provided in the disc storage section (16) corresponding to each disc storage position. a moving member (108) which is provided as a movable member and which moves between a first position and a second position depending on the presence or absence of a disc, and a base which moves along the direction in which the discs are arranged in the disc storage section and carries a disc gripping means. (40) and a first detection sensor (1-09a) that moves together with the moving member to detect whether the moving member is in the first position or the second position. Therefore, since the presence or absence of a disc can be quickly detected at the same time as the base is moved, no time is wasted playing the disc. Further, in the disc playing device according to the present invention, the disc presence/absence detection means moves together with the -F, t [F base, and the base is moved by a predetermined distance from a position where the disc gripping means can grip the stored disc. A second detection sensor (109b) is provided to detect whether the moving member (108) is at the first position or the second position. In the disc playing device according to the present invention, a positioning protrusion (18d) is provided at each disc storage position of the disc storage part (16), which protrudes in the disc arrangement direction and positions the stored disc by fitting into the disc center hole. The disc ejecting and transporting mechanism transports the disc after moving the disc a predetermined distance to the disc playing device and releasing the fitted state between the disc center hole and the positioning protrusion. When the disk is stored in the original storage position again by tracing the disc backwards, in order to avoid engagement between the positioning protrusion (18d) and the outer periphery of the disk, move the disc from the position where the disc gripping means can grip the disc to the predetermined position. Only distance - L base (
40) is moving, it is necessary to move the disk gripping means to return the disk onto the positioning protrusion. Here, since the base (40) has moved by the predetermined distance from a position where the disc gripping means can grip the disc, the first detection sensor detects the moving member (1).
If the position of 08) cannot be detected, for example, an accident may occur in which a played disc is double-inserted into a disc storage position in which a disc of number 1 is already stored. In order to prevent such accidents, the second detection sensor (109
b) is established. As an alternative means to avoid such an accident, the movable member (108) may be made larger so that the base (40) is moved by a predetermined distance from a position where the disc gripping means can grip the storage disc. The first detection sensor (1
Although it is possible to detect the moving position of the moving member using 09a), if the moving direction of the moving member is in the disk arrangement direction, it is inevitable that the position of the moving member in the disk arrangement direction of the disk storage section will be greatly affected. I have no choice but to do it. That is, by providing the second detection sensor (109b), the above-mentioned accident can be avoided without increasing the size of the disk storage section (1G).

[Brief explanation of the drawing]

FIG. 1 is a front view of a disc playing device according to the present invention, and FIG.
The figure is an overall perspective view of the internal structure of the disc playing device.
5 and 4 are detailed perspective views of the disc storage section, FIGS. 5 and M6 are perspective views showing the base and its peripheral members, and FIG. 7 is a detailed perspective view of the disc gripping means for gripping the disc.
FIG. 8 is a plan view including a partial cross section of the disk gripping means;
FIGS. 9(a) and (b) are side and rear views of the clamp mechanism, respectively, and FIG. 10(a) illustrates the slit and detection sensor formed in the disk holding unit, which is a component of the disk storage section. Figure 10) is a partial detailed view of the internal structure described in -A, Figure 11 is a diagram showing the configuration of the drive control system in the disc playing device, and Figure 12 is a diagram showing the operation of the disc playing device. It is a flowchart for explaining. Explanation of symbols of main parts 1... Disc playing device 2... Housing 3... Door 3a.
...Glass plate 5...Operation unit 6...
...Adjustment section 7..Track selection section 8..Coin receiving section 10.....Casters 11.....Under base 12.....Frame 15. ... Disk 16 ... Disk storage section 17 ... Disc carrying unit 17a ...
...Support protrusion 17c...Small window 18...
・Plate member 18c...Semicircular disk storage portion 18d...
...Positioning protrusion 188...Vertex portion 20.21.22...Shaft 20a...
...First threaded part 201)... Second threaded part 24... Receptacle (Plate 24a... Retaining ring 25... Holding plate 26... ... Oak t-26a ... Washer 27
．． 41d, 57.82a, 82b, 91°96a
, 96b... Coil spring 29...
- Upper bases 29a, 43a, 55a, 59a, 68a. 110.112...Bracket 29b +, 4
3b, 88...Small spindle 29c, 43
C, 43d, 44b, 66a. 66b...Tooth A] Belt wheel 31... Turntable 32... Spindle motor 33... Optical pickup 36.37.61...・Guide shaft 40...
...Base 40a...Cylindrical portions 41a, 41b, 56.59...Roller 41C
......Lever 44.68.77.86...Motor 44a...
... Fixed plate 46.47.67 ... Toothed belt 49 ...
...Rail 50...No.J counterweight 51.52...Pulley 53...Wire 55...Swivel part 6
2.63...Divided chassis 63a...Guide portion 64...Movable chassis 66C, 88a...Worm wheel 68b
, 8611... A-me 71... Spindle 718... Gripping blocks 71b, 75a, 75b, 77a, 78a. 88b...Gear 72...Frame 72a, 87b, 113a, 117a・
...Bin 72c, 79a...Protruding portion 73.74...Gripping arm 73a, 74a...Tip portion 73b, 74b...Rack Sections 73d, 74. d...Long hole 78...Screw shaft 78b...Screw part 79...Movable bracket 1-81...Slider 81a, 87a ...... Light shielding plate M, 93, 101, 103, 106° 109a, 109b... Photo sensor 86a
,...Coupler 87...Holding member 90...Stopper 95...Movable piece 99, 111, 119...Detection switch 100
．． 105...Address plate 102...Slit groups 102a, 102b, 102c, 102d. 105a, 105b...Slit 103a
, 103b, 103c, 103d... Photocoupler 103e... Center shaft 108... Moving member 108a... Pin portion 108b... Rear end Section 108C...Front end 110a...Lock screw 113...Support member 114...Press member 115...Geared motor 115a... ...Output shaft 116...First lever member 117...Second lever member 118...Auxiliary lever member 120...Control circuit applicant Pioneer Motohiko Fujimura, Agent of Co., Ltd. 1st concave 2 concave collection 9 Diagram (a and Cb) ≦≧l, to Tm (θn soldier 10 concave (b) Blind//θb

Claims (1)

[Scope of Claims] A disc storage unit capable of sequentially arranging and storing a plurality of discs, a disc playing means, and a disc ejecting and transporting unit that sequentially selects arbitrary discs stored in the disc storage unit and transports them to a playing position. The disk ejecting and conveying mechanism includes a base movable along the disk arrangement direction of the disk storage section, and a selected disk provided on the base so as to be movable in a direction substantially perpendicular to the disk arrangement direction. . disc gripping means for gripping the disc, and disc presence/absence detection means for detecting the presence or absence of a disc at each disc storage position of the disc storage section, and a disc gripping means for detecting the presence or absence of a disc at each disc storage position. A positioning protrusion is provided which positions the stored disk by protruding and fitting into the disk center hole, and the disk ejecting and conveying mechanism 1 moves the disk a predetermined distance in the disk arrangement direction.
) is moved to release the fitted state between the disk center hole and the positioning protrusion, and the disk is transported after IC, and the disk presence/absence detection means is inserted into the disk storage portion in correspondence with each disk storage position. a moving member that moves between a first position and a second position depending on the presence or absence of a disc; and a moving member that moves together with the base so that when the base reaches a position where the disc gripping means can grip the disc a first detection sensor that detects whether the movable member is in the first position or the second position; and a first detection sensor that moves together with the base so that the base is the predetermined distance from a position where the disc gripping means can grip the disc. A disc performance device comprising: a second detection sensor that detects whether the moving member is in either the first position or the second position while the moving member is moving.