JP3744835B2 - Disc loading device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk loading apparatus for loading a disk as an information recording medium such as an optical disk or a magneto-optical disk onto a disk reproducing apparatus.
[0002]
[Prior art]
Conventionally, with the widespread use of discs as information recording media such as optical discs and magneto-optical discs, in order to easily handle a plurality of discs together, the plurality of discs are accommodated at one time. Disc loading apparatuses that selectively perform reproduction have been proposed. Also, in this type of disc loading apparatus, it is important for convenience that a disc that is not related to playback or recording can be taken in and out or exchanged during playback or recording of a disc. There has been a need for such a disk loading device.
[0003]
FIG. 29 is a basic operation diagram schematically showing the movement of the tray and the reproduction mechanism unit in an example of a conventional disk loading apparatus that satisfies such a requirement. In this example, as shown in the figure, a plurality of trays (in this example, the upper tray 4 and the lower tray 5) on which the disk 9 can be placed are superposed at the storage position of the front part in the housing 1 of the apparatus. These trays are selectively moved between a position where a disk outside the apparatus can be attached and detached (removal position) and a position where the disk inside the apparatus is played back (reproduction position). ing.
[0004]
Here, FIG. 5A shows a state in which the upper tray 4 is in the attachment / detachment position. FIG. 5B shows a state where the upper tray 4 and the lower tray 5 are overlapped and stored in the storage position. Further, FIG. 3C shows a state in which the lower tray 5 is at the reproduction position. FIG. 4D shows a state where the disk 9 placed on the lower tray 5 is being reproduced.
[0005]
In this disk loading apparatus, regardless of the tray on which the disk 9 to be reproduced is placed, the reproduction mechanism unit 20 in the inner part of the housing 1 is moved up and down to reproduce the target disk 9. . The reproduction mechanism unit 20 includes a turntable 21 that rotates the disk 9, a pickup that reads information recorded on the disk 9, and a drive mechanism that moves the pickup in the radial direction of the disk 9.
[0006]
Specifically, as shown in FIGS. 3C to 3D, a reproduction mechanism unit lifting / lowering mechanism (not shown) that moves the reproduction mechanism unit 20 in the vertical direction of the apparatus normally causes the reproduction mechanism unit 20 to move more than all trays. The playback mechanism unit 20 located at the lower part moves up, and the disk 9 placed on one tray (lower tray 5 in this example) at the playback position is picked up by the turntable 21 in the process.
[0007]
When the reproduction mechanism unit 20 continues to rise, the disk 9 on the turntable 21 comes into contact with the disk retainer 8 attached to the upper portion of the housing 1 and an urging force is applied in the direction of the turntable 21. At this point, the playback mechanism unit lifting mechanism is stopped, and the playback mechanism unit 20 has reached the playback position. In the above state, if a drive mechanism for moving the tray from the storage position to the attachment / detachment position is separately provided, the other disk 9 can be replaced during the reproduction or recording of the disk 9.
[0008]
[Problems to be solved by the invention]
However, in the conventional disk loading apparatus as described above, since the height of each tray at the reproduction position is different, the movement range of the reproduction mechanism unit including the turntable and the pickup must be increased. Therefore, in order to move the reproduction mechanism unit up and down, a drive mechanism different from the movement of the tray is generally required. In other words, it is necessary to provide two different drive mechanisms in the apparatus housing, which complicates the apparatus structure, increases the number of parts and costs, and further increases the size of the apparatus.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and it is an object of the present invention to provide an inexpensive disk loading device without increasing the size of the entire device by simplifying the configuration of the tray driving mechanism and the reproducing mechanism unit. .
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention moves between a first attachment / detachment position where a disk can be attached / detached, a first storage position where a disk is stored and stands by, and a first reproduction position where a disk can be reproduced. A second tray that can be moved between a first tray that can be attached, a second attachment / detachment position where the disc can be attached / detached, a second storage position where the disc is received and waited, and a second reproduction position where the disc can be played back And a disk playback means for playing back the disk placed on the first tray or the disk placed on the second tray, and a playback means movement for reciprocating the disk playback means between the playback position and the non-playback position A gear having a tooth portion and a missing tooth portion on the outer peripheral portion, a tooth portion on the outer peripheral portion of the cam gear and a rack provided on the first tray, and First removable position The first gear driven between the first and second storage positions, the teeth of the outer periphery of the cam gear and the rack provided on the first tray, and the first tray is engaged with the first storage position and the first regeneration position. The second gear driven between the first gear and the teeth of the outer periphery of the cam gear and the rack provided on the second tray, and the second tray is driven between the second attachment / detachment position and the second storage position. A third gear that engages with a tooth portion of the outer periphery of the cam gear and a rack provided on the second tray, and drives the second tray between a second storage position and a second regeneration position. A cam gear outer peripheral tooth portion and a fifth gear meshing with a rack provided in the reproducing means moving mechanism, and the cam gear rotates to drive the first gear to the fifth gear. The first tray, the second tray, and And controlling the movement of said disc reproducing means.
[0011]
Further, the movement of the first tray between the first attachment / detachment position and the first reproduction position, the movement of the second tray between the second attachment / detachment position and the second reproduction position, and reproduction of the disc reproduction means. The movement between the position and the non-reproducing position is performed during one rotation of the cam gear.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a disk loading apparatus according to an embodiment of the present invention. FIG. 2 is a perspective view showing the internal structure of the disk loading apparatus according to this embodiment. As shown in these drawings, the present disk loading apparatus includes a housing 1, and an upper tray storage portion 2, a lower tray storage portion 3, an upper tray 4, a lower tray 5, and a disk presser are provided in the housing 1. 8 etc. are built in.
[0013]
FIG. 3 is an exploded perspective view showing the structure of each part around the casing. As shown in the figure, on the left and right of the rear portion of the housing 1, a tray guide 1k that restricts the vertical movement of the upper tray 4, a tray guide 1L that restricts the horizontal movement of the lower tray 5, and the tray guide 1L. And a tray guide 1d for guiding the lower tray 5 so as to incline upward on the back side of the apparatus. In addition, a reproduction mechanism unit 20 and a motor 13 are attached to the lower surface of the housing 1. Details will be described later.
[0014]
FIG. 4 is a perspective view showing the structure of the lower tray storage unit. The lower tray storage unit 3 is attached to the front portion of the housing 1. As shown in the figure, a tray guide 3 a that regulates the vertical movement of the lower tray 5 protrudes inward from the left and right ends. In addition, a tray guide 3b that regulates the left and right direction operation of the lower tray 5 protrudes upward from the vicinity of the bottom left and right ends.
[0015]
FIG. 5 is a perspective view showing the structure of the upper tray storage unit. The upper tray storage unit 2 is attached to the upper side of the lower tray storage unit 3. As shown in the figure, a tray guide 2 a that restricts the vertical movement of the upper tray 4 is provided in the upper tray storage portion 2 so as to protrude inward from the left and right ends. In addition, a tray guide 2b that restricts the operation of the upper tray 4 in the left-right direction protrudes upward from the vicinity of the left and right ends of the bottom surface.
[0016]
FIG. 6 is a plan view showing two types of disks mounted on the disk loading apparatus according to the present embodiment. FIG. 4A shows a large-diameter disk 9 and FIG. 4B shows a small-diameter disk 10. The upper tray 4 is slidably mounted in the upper tray storage section 2 in a substantially horizontal front-rear direction (in the direction of arrow A in FIG. 1) of the housing 1, and a disk 9 or a disk 10 as an information recording medium is mounted. Then, the sheet is transported between a disk attachment / detachment position on the front outside of the housing 1 and a first tray disk reproduction position located at the back of the housing 1.
[0017]
On the other hand, the lower tray 5 is slidably mounted in the lower tray storage section 3 so as to be substantially parallel to the upper tray 4, and a disk 9 or a disk 10 as an information recording medium is attached to and detached from the front of the housing 1. It is transported between the position and the tray holding position on the lower tray storage unit 3, and is transported between the second tray disk playback position and the lower tray storage unit 3 in the vicinity of the first tray disk playback position.
[0018]
FIG. 7 is a perspective view showing the structure of the upper tray. As shown in the figure, the upper tray 4 has substantially circular recesses 4a and 4b having different diameters concentrically on the upper surface thereof. The concave portion 4a is formed so as to accommodate a large-diameter disc 9, and the concave portion 4b is formed so as to accommodate a small-diameter disc 10.
[0019]
The upper tray 4 has a hole 4d at the center of the recess, and has a hole 4e that is connected to the rear thereof. The hole 4d is for introducing the turntable 21 on the reproduction mechanism unit 20 shown in FIG. 3, and the hole 4e is for introducing the pickup 22 on the reproduction mechanism unit 20 as well. The upper tray 4 is provided with a positioning hole 4f at the inner right end of the recess 4b. As will be described later, the positioning boss 7c provided integrally with the reproduction unit holder 7 is fitted at the reproduction position T3.
[0020]
Further, the upper tray 4 is provided with guide grooves 4g along the movement direction on both side surfaces, and guide grooves 4h are provided along the movement direction on the lower surface side of both side edges. The guide groove 4g engages with the tray guide 2a provided integrally with the upper tray storage unit 2 shown in FIG. 5 to guide the operation of the upper tray 4. The guide groove 4 h engages with a tray guide 2 b provided integrally with the upper tray storage portion 2 to guide the operation of the upper tray 4.
[0021]
FIG. 8 is a perspective view showing the structure of the lower tray. As shown in the figure, the lower tray 5 has concentric concentric recesses 5a and 5b having different diameters on the upper surface thereof. The concave portion 5a is formed so as to accommodate the large-diameter disk 9, and the concave portion 5b is formed so as to accommodate the small-diameter disk 10.
[0022]
The lower tray 5 has a hole 5d at the center of the recess, and has a hole 5e that is continuous with the rear thereof. The hole 5d is for introducing the turntable 21 on the reproduction mechanism unit 20 shown in FIG. 3, and the hole 5e is for introducing the pickup 22 on the reproduction mechanism unit 20 as well. The lower tray 5 is provided with a positioning hole 5f at the inner right end of the recess 5b. As will be described later, the positioning boss 7c provided integrally with the reproduction unit holder 7 is fitted at the reproduction position T6.
[0023]
Further, the lower tray 5 is provided with guide grooves 5g along the moving direction on both side surface portions, and with guide grooves 5h along the moving direction on the lower surface side of both side edge portions. The guide groove 5g engages with a tray guide 3a provided integrally with the lower tray storage portion 3 shown in FIG. 4 to guide the operation of the lower tray 5. The guide groove 5 h engages with a tray guide 3 b provided integrally with the lower tray storage portion 3 to guide the operation of the lower tray 5.
[0024]
In the following description, only the disk 9 is used for convenience except for the case where a feature specific to either the disk 9 or the disk 10 is described.
[0025]
FIG. 9 is a basic operation diagram schematically showing the movement of the tray and the reproduction mechanism unit in the disk loading apparatus according to the present embodiment. As shown in the figure, in this apparatus, the upper tray 4 transports the disk 9 to the attachment / detachment position T1, the storage position T2, and the reproduction position T3, and the lower tray 5 transfers the disk 9 to the attachment / detachment position T4, the storage position T5, and the storage position T5. It is configured to be conveyed to the reproduction position T6.
[0026]
The attachment / detachment position T <b> 1 shown in FIG. 4A is a position where the disk 9 is attached / detached to / from the upper tray 4 in front of the housing 1. The storage position T2 shown in FIG. 5B is a position where the upper tray 4 is held by a disk holding mechanism described later in the upper tray storage portion 2 located at the front of the apparatus. A reproduction position T3 shown in FIG. 6D is a position where the disk 9 on the upper tray 4 has been transported to a position where it can be reproduced by the reproduction mechanism unit 20 located on the back side of the housing 1.
[0027]
The attachment / detachment position T4 shown in FIG. 5 (f) is a position where the disk 9 is attached / detached to / from the lower tray 5 at the front outside of the housing 1. The storage position T5 shown in FIG. 5E is a position where the lower tray 5 is held by a disk holding mechanism, which will be described later, in the lower tray storage portion 3 located at the front of the apparatus. A reproduction position T6 shown in FIG. 6A is a position where the disk 9 on the lower tray 5 has been transported to a position where it can be reproduced by the reproduction mechanism unit 20 located on the back side of the housing 1.
[0028]
As shown in FIG. 7, a rack 4c is formed on one side surface (left side as viewed from the front) of the upper tray 4 over almost the entire length in the moving direction. The rack 4c meshes with a first tray drive gear 26 described later on the front side of the apparatus, and moves the upper tray 4 between the attachment / detachment position T1 and the storage position T2. Further, the rack 4c meshes with a second tray drive gear 28 described later between the storage position T2 and the regeneration position T3, and moves the upper tray 4.
[0029]
Further, as shown in FIG. 8, a rack 5c is formed on one side surface (right side as viewed from the front) of the lower tray 5 over almost the entire length in the moving direction. The rack 5c meshes with a third tray driving gear 30 described later on the front side of the apparatus, and moves the lower tray 5 between the attachment / detachment position T4 and the storage position T5. Further, the rack 5c meshes with a fourth tray driving gear 32 described later between the storage position T5 and the reproduction position T6, and moves the upper tray 4.
[0030]
By the way, as shown in FIG. 3, a rack 18a is provided at the lower front portion of the up-and-down rack member 18 and is inserted into a guide groove 1b provided near the center of the housing 1. It is slidably arranged in the left-right direction of the apparatus. The lifting rack member 18 is provided with inclined guide grooves 18b on the left and right. This moves the reproduction mechanism unit 20 between the reproduction position P1 shown in FIG. 9A and the non-reproduction position P2 shown in FIG. 9C.
[0031]
Further, the rear portion of the substantially flat playback mechanism unit 20 is screwed to the rear portion of the lower surface of the housing 1 through vibration-proof rubbers 23 provided at the left and right ends thereof. A substantially box-shaped reproduction unit holder 7 is screwed through vibration-proof rubbers 23 (not shown) provided at the left and right ends. On the front surface of the reproduction unit holder 7, left and right lifting bosses 7a project forward, and are fitted in the guide grooves 18b of the lifting rack member 18.
[0032]
Further, on both side surfaces of the reproduction unit holder 7, a rotation guide convex portion 7 b is integrally provided so as to protrude from each side, and is associated with a rotation guide groove 1 a provided near the center of the housing 1. Match. This guides the movement of the reproduction mechanism unit 20 between the reproduction position P1 and the non-reproduction position P2. Further, a positioning boss 7c is integrally provided on the upper surface of the reproduction unit holder 7 so as to protrude upward. This is for positioning the upper tray 4 at the reproduction position T3 or the lower tray 5 at the reproduction position T6.
[0033]
Here, an outline of the basic operation in the present disk loading apparatus will be described with reference to the basic operation diagram of FIG. First, the standby state is shown in FIG. The standby state is a state in which the upper tray 4 is at the storage position T2, the lower tray 5 is at the reproduction position T6, and the reproduction mechanism unit 20 is at the reproduction position P1. Next, when the disk is attached to or detached from the upper tray 4 from the standby state, the upper tray 4 is moved to the attachment position T1 by driving the first tray drive gear 26 as shown in FIG. Let Here, the upper tray 4 on which the disk 9 is placed is returned to the storage position T <b> 2 by driving the first tray driving gear 26.
[0034]
When the disk 9 on the upper tray 4 is subsequently played back, the playback mechanism unit 20 first moves from the state shown in FIG. 5B to the non-playback position as shown in FIG. 5 becomes a movable state. Then, as shown in FIG. 4D, the upper tray 4 is moved to the reproduction position T3 by driving the second tray driving gear 28, and the lower tray 5 is moved to the storage position by driving the fourth tray driving gear 32. Move to T5.
[0035]
Thereafter, as shown in FIG. 5E, the reproducing mechanism unit 20 moves to the reproducing position P1, and the disk 9 on the upper tray 4 is reproduced. Further, when the disk is attached to or detached from the lower tray 5, the lower tray 5 is moved to the attachment position T4 by driving the third tray driving gear 30, as shown in FIG. The above is the outline of the basic operation in the present disk loading apparatus.
[0036]
Next, the configuration of each part of the driving force transmission mechanism will be described. This is a mechanism for transmitting a driving force from the motor as a driving source to the upper tray 4, the lower tray 5, and the reproduction mechanism unit 20 described above. As shown in FIG. 3, a motor 13 serving as a drive source is attached to the lower surface near the front center of the housing 1, and a pinion gear 14 is attached to the rotating shaft thereof.
[0037]
Here, FIG. 10 is a plan view showing an internal configuration of a portion related to the tray and the reproduction mechanism unit in the disk loading apparatus. FIG. 11 is an exploded perspective view showing a structure of a portion related to the tray and the reproduction mechanism unit in the disk loading apparatus. As shown in these drawings, the driving force of the motor 13 is transmitted from the pinion gear 14 to the driving cam 17 through the reduction mechanism of the intermediate gear 15 and the intermediate gear 16.
[0038]
The drive cam 17 is a rotating body that is positioned below the tray storage portion and is rotatably attached to the housing 1. Further, the motor 13, the rotating shaft portion of the intermediate gear 15, and the rotating shaft portion of the intermediate gear 16 are configured to be disposed inside the rotating shaft portion 1 j of the drive cam 17. A gear portion 17 a that meshes with the intermediate gear 16 is provided on the inner side surface portion of the drive cam 17, whereby the driving force is transmitted to the drive cam 17. Further, a gear is provided on the outer surface portion of the drive cam 17, and driving force is applied to the intermediate gear for moving the upper tray 4 and the lower tray 5 and the lifting rack member 18 for moving the reproduction mechanism unit 20 up and down. The driving force is transmitted by meshing with the transmitting intermediate gear group. Details will be described later.
[0039]
FIG. 12 is a diagram showing a configuration of a portion related to the drive cam in the present disk loading apparatus. The figure (a) is a perspective view, The figure (b) has shown the expanded view of an outer surface gear part. In the figure, a certain direction (here, the front of the apparatus) viewed from the center O of the drive cam 17 is set to 0 °, and the side surface is expanded to 360 °. And the meshing state of each gear part is shown.
[0040]
As shown in the figure, around the side surface of the drive cam 17, a gear portion 17b is provided at the uppermost stage. This meshes with the intermediate gear 25 and the intermediate gear 27 that transmit a driving force for driving the upper tray 4. The gear portion 17b includes a tooth portion 17b1 having a plurality of teeth meshing with the gear portion 25a of the intermediate gear 25 and the gear portion 27a of the intermediate gear 27, and an arc-shaped missing tooth portion 17b2 having a pitch circle diameter of the tooth portion 17b1 as a diameter. Are configured as a gear group provided continuously.
[0041]
A gear portion 17d is provided on the side of the drive cam 17 and below the gear portion 17b. This meshes with the intermediate gear 29 and the intermediate gear 31 that transmit the driving force for driving the lower tray 5. The gear portion 17d includes a tooth portion 17d1 composed of a plurality of teeth meshing with the gear portion 29a of the intermediate gear 29 and the gear portion 31a of the intermediate gear 31, and an arc-shaped missing tooth portion 17d2 whose diameter is the pitch circle diameter of the tooth portion 17d1. Are configured as a gear group provided continuously.
[0042]
Further, on the side surface of the drive cam 17, a rotation holding portion 17c is provided between the gear portions 17b and 17d. The rotation holding portion 17c includes a holding portion 17c1 having a large outer diameter and a separation portion 17c2 having a small outer diameter. In the present embodiment, the separation portion 17c2 has the same diameter as the tooth missing portion 17b2 of the gear portion 17b and the tooth missing portion 17d2 of the gear portion 17d.
[0043]
Incidentally, the first tray drive gear 26 and the intermediate gear 25 are both intermediate transmission members that are rotatably disposed at the left front portion of the housing 1. Similarly to the intermediate gear 27 described later, the gear portion 25a of the intermediate gear 25 that meshes with the gear portion 17b of the drive cam 17 is provided with a plurality of teeth having a shape in which the tip portion of the tooth is cut off along the pitch circle diameter. In addition, the rotation position is set in advance in the missing tooth portion 17b2 of the gear portion 17b described above.
[0044]
Further, the gear portion 26 a of the first tray driving gear 26 is engaged with the gear portion 25 b of the intermediate gear 25, and the gear portion 26 b is engaged with a rack portion 4 c provided on one side surface of the upper tray 4. The driving force of the gear 25 is transmitted to the upper tray 4. Thereby, the upper tray 4 is moved between the attachment / detachment position T1 and the storage position T2.
[0045]
On the other hand, the second tray drive gear 28 and the intermediate gear 27 are both intermediate transmission members that are rotatably disposed at the center of the left side of the housing 1. Here, FIG. 13 is a plan view showing a configuration of a portion related to the upper tray holding mechanism in the disk loading apparatus. As shown in FIG. 5A, the gear portion 27a of the intermediate gear 27 that meshes with the gear portion 17b of the drive cam 17 is provided with a plurality of teeth having a shape in which the tip portion of the tooth is cut off along the pitch circle diameter. In addition, the rotation position is set in advance in the missing tooth portion 17b2 of the gear portion 17b described above.
[0046]
Further, as shown in FIG. 5B, the held portion 27c provided on the intermediate gear 27 and projecting in the radial direction comes into contact with the holding portion 17c1 having a larger diameter than the toothless portion 17b2, and the rotational position is set. Configured to hold. Although not shown here, the gear portion 28 a of the second tray drive gear 28 is engaged with the gear portion 27 b of the intermediate gear 27, and the gear portion 28 b is a rack portion 4 c provided on one side surface of the upper tray 4. , The driving force of the intermediate gear 27 is transmitted to the upper tray 4. Thereby, the upper tray 4 is moved between the storage position T2 and the reproduction position T3.
[0047]
Further, the third tray drive gear 30 and the intermediate gear 29 are both intermediate transmission members that are rotatably disposed at the right front portion of the housing 1. Similarly to the intermediate gear 31 to be described later, the gear portion 29a of the intermediate gear 29 that meshes with the gear portion 17d of the drive cam 17 is provided with a plurality of teeth having a shape in which the tip end portion of the tooth is cut off along the pitch circle diameter. In addition, the rotation position is set in advance in the missing tooth portion 17d2 of the gear portion 17d described above.
[0048]
Further, the gear portion 30 a of the third tray driving gear 30 meshes with the gear portion 29 b of the intermediate gear 29, and the gear portion 30 b meshes with the rack portion 5 c provided on one side surface of the lower tray 5, thereby The driving force of the gear 29 is transmitted to the lower tray 5. Thereby, the lower tray 5 is moved between the attachment / detachment position T4 and the storage position T5.
[0049]
On the other hand, the fourth tray drive gear 32 and the intermediate gear 31 are both intermediate transmission members that are rotatably disposed at the right center portion of the housing 1. Here, FIG. 14 is a plan view showing the configuration of the portion related to the holding mechanism of the lower tray in the present disk loading apparatus. As shown in FIG. 5A, the gear portion 31a of the intermediate gear 31 that meshes with the gear portion 17d of the drive cam 17 is provided with a plurality of teeth having a shape in which the tip portion of the teeth is cut off along the pitch circle diameter. In addition, the rotation position is set in advance in the missing tooth portion 17d2 of the gear portion 17d described above.
[0050]
Further, as shown in FIG. 5B, the held portion 31c provided in the intermediate gear 31 and projecting in the radial direction comes into contact with the holding portion 17c1 having a larger diameter than the tooth missing portion 17d2, and the rotational position is set. Configured to hold. Further, the gear portion 32 a of the fourth tray drive gear 32 meshes with the gear portion 31 b of the intermediate gear 31, and the gear portion 32 b meshes with the rack portion 5 c provided on one side surface of the lower tray 5, thereby The driving force of the gear 31 is transmitted to the lower tray 5. Thereby, the lower tray 5 is moved between the storage position T5 and the reproduction position T6.
[0051]
FIG. 15 is a plan view showing a configuration of a portion related to the raising / lowering drive of the reproducing mechanism unit in the disc loading apparatus. As shown in FIG. 11, FIG. 11, and FIG. 12, a gear portion 17e is provided outside the drive cam 17 and below the gear portion 17d. This meshes with the first regeneration unit drive gear 33 that transmits the drive force for moving the regeneration mechanism unit 20. The gear portion 17e is composed of a continuous tooth portion 17e1 composed of a plurality of teeth meshing with the gear portion 33a of the first reproduction unit drive gear 33 and an arc-shaped missing tooth portion 17e2 whose diameter is the pitch circle diameter of the tooth portion 17e1. And a gear separation portion 17e3 that does not come into contact with the gear portion 33a.
[0052]
Further, a gear portion 17f is provided at the bottom of the side surface of the drive cam 17. This meshes with the second regeneration unit drive gear 34 that transmits the drive force for moving the regeneration mechanism unit 20. The gear portion 17f is on the outer surface of the drive cam 17, and has a tooth portion 17f1 composed of a plurality of teeth meshing with the gear portion 34a of the second reproduction unit drive gear 34, and a circle whose diameter is the pitch circle diameter of the tooth portion 17f1. An arc-shaped missing tooth portion 17f2 is composed of a gear group provided continuously, and a gear separation portion 17f3 that does not contact the gear portion 34a.
[0053]
The first reproduction unit drive gear 33 and the second reproduction unit drive gear 34 are intermediate transmission members rotatably attached to the housing 1, and the gear portion 33b of the first reproduction unit drive gear 33 is a second transmission member. The reproduction unit drive gear 34 is disposed so as to mesh with the gear portion 34a.
[0054]
As shown in FIG. 15 (c), the gear portion 33 a and the gear portion 17 e mesh with each other, and the driving force from the drive cam 17 is transferred to the second reproduction unit drive gear 34 via the first reproduction unit drive gear 33. In the transmitted state, the gear portion 17f is a separation portion 17f3, and the gear portion 17f and the gear portion 34a are set in advance so as not to contact each other. Further, as shown in FIG. 15B, in a state where the gear portion 34a and the gear portion 17f are engaged with each other and the driving force from the driving cam 17 is transmitted to the second reproduction unit driving gear 34, the gear portion. Reference numeral 17e denotes a separation portion 17e3, which is set in advance so as not to contact the gear portion 17e and the gear portion 33a.
[0055]
FIG. 15A shows the rotation position holding state of the first reproduction unit drive gear 33 and the second reproduction unit drive gear 34. Similarly to the intermediate gear 27, the gear portion 33a is provided with a plurality of teeth having a shape in which the tip portion of the tooth is cut off along the pitch circle diameter. In the above-described missing tooth portion 17e2 of the gear portion 17e, The rotation position is set in advance. Further, similarly, the gear portion 33a is provided with a plurality of teeth having a shape in which the tip portion of the tooth is cut off along the pitch circle diameter, and the rotational position is maintained in the above-described missing tooth portion 17f2 of the gear portion 17f. Is set in advance.
[0056]
The gear portion 34b of the second regeneration unit drive gear 34 is configured to mesh with the rack portion 18a of the lifting rack member 18 described above, and the driving force from the drive cam 17 is applied to the second regeneration unit drive gear 34, Alternatively, it is transmitted to the lifting rack member 18 via the first reproduction unit drive gear 33 and the second reproduction unit drive gear 34.
[0057]
As described above, in the present disk loading apparatus, the first reproduction unit drive gear 33 and the second reproduction unit drive gear 34 that drive the reproduction mechanism unit 20 are provided by the gear portions 17e and 17f provided on the outer periphery of the drive cam 17. It is driven. That is, it is configured to be driven and controlled by the same drive cam 17 as that of the upper tray 4 and the lower tray 5, and the drive mechanism is simplified.
[0058]
Hereinafter, specific operations of the apparatus will be described in order. In the present disk loading apparatus, as shown in FIG. 9B, the upper tray 4 is normally at the storage position T2, the lower tray 5 is at the reproduction position T6, and the reproduction mechanism unit 20 is at the disk reproduction position P1. Is in a standby state.
[0059]
The upper tray 4 meshes with the first tray driving gear 26 and the second tray driving gear 28 at the storage position T2. The gear portion 25 a of the intermediate gear 25 that meshes with the first tray drive gear 26 holds the rotational position by contact with the toothless portion 17 b 2 of the gear portion 17 b provided on the outer peripheral portion of the drive cam 17. The gear portion 27a of the intermediate gear 27 that meshes with the second tray drive gear 28 contacts with the missing tooth portion 17b2 of the gear portion 17b provided on the outer peripheral portion of the driving cam 17, and the held portion 27c has the missing tooth portion 17b2. The rotational position of the intermediate gear 27 is held by contacting the holding portion 17c1 having a larger diameter. By holding the rotational positions of the intermediate gear 25 and the intermediate gear 27, the upper tray 4 is held at the storage position T2.
[0060]
FIG. 16 is a side view showing the configuration of the tray operation guide mechanism in the present disk loading apparatus. As shown in FIGS. 9E to 9A, the lower tray 5 is moved between the storage position T5 and the reproduction position T6 by driving the fourth tray driving gear 32. On the other hand, the upper tray 4 is moved between the reproduction position T3 and the storage position T2 by the driving of the second tray driving gear 28.
[0061]
When the lower tray 5 is moved from the storage position T5 to the reproduction position T6, the tray guide 3a provided in the lower tray storage unit 3 is subject to an operation restriction in the vertical direction, and the tray guide provided in the lower tray storage unit 3 is operated. 3b and the tray guide 1L provided in the housing 1 move toward the back of the apparatus while being restricted in operation in the left-right direction.
[0062]
The tray guide 1L is connected to a tray guide 1d that is inclined upward in the apparatus at the back of the apparatus. When the movement of the lower tray 5 progresses and the rear end thereof reaches the tray guide 1d, the lower tray 5 moves further to the rear side of the apparatus while the rear part thereof is tilted upward of the apparatus according to the inclination of the tray guide 1d. To do. As a result, the lower tray 5 is positioned at the reproduction position T6 in the vicinity of the reproduction position T3 of the upper tray 4 as shown in FIG. 9B.
[0063]
The lower tray 5 has a positioning boss 7c integrally provided in the playback unit holder 7 at the disk playback position P1 at the playback position T6 and is fitted and held in a positioning hole 5f provided in the lower tray 5. Yes. Here, FIG. 17 is a plan view showing the configuration of the portion related to the drive cam in the present disk loading apparatus. In the state where the lower tray 5 is at the reproduction position T6, the rotational position of the drive cam 17 is the state where the black circle mark portion is at the position on the front side of the apparatus indicated by Tp1, as shown in FIG. This state is hereinafter referred to as a Tp1 position. Other locations will be named similarly.
[0064]
18 to 23 are plan views showing the rotational positions of the drive cams and the positions of the trays, the lifting rack members and the like in the present disk loading apparatus. 24 to 28 are plan views showing the rotational position of the drive cam, the positional relationship of each tray, the lifting rack member, etc., and the meshing state of each part gear in this disk loading apparatus. Each figure (a) is an overall view, and (b), (c), and (d) are detailed views of a B part, a C part, and a D part, respectively.
[0065]
In order to change the disk on the upper tray 4 to the replaceable state from the state of FIG. 9B and FIG. 19 at the Tp1 position, the drive cam 17 is rotated as shown in FIG. It rotates clockwise from the Tp1 position shown to the Tp2 position. At this time, as shown in FIG. 24, the gear portion 17b1 of the gear portion 17b provided on the drive cam 17 and the gear portion 25a of the intermediate gear 25 mesh with each other, and the intermediate gear 25 is rotationally driven.
[0066]
Then, by meshing between the gear portion 25b of the intermediate gear 25 and the gear portion 26a of the first tray driving gear 26, and meshing between the gear portion 26b of the first tray driving gear 26 and the rack 4c provided on the side surface of the upper tray, The upper tray 4 is driven. When the drive cam 17 reaches the Tp2 position, the upper tray 4 is in the attaching / detaching position T1 shown in FIGS. 9A and 18, and the disk can be exchanged. Moreover, the upper tray 4 can be moved from the attachment / detachment position T1 to the storage position T2 by the reverse procedure.
[0067]
During this time, the gear portion 17d provided on the drive cam 17 and meshing with the intermediate gear 31 serves as a missing tooth portion 17d2, and the lower tray 5 is held at the disc reproduction position T6. At the same time, as shown in FIG. 15A, the gear portion 17e that meshes with the gear portion 33a of the first reproduction unit drive gear 33 is a toothless portion 17e2, and the second reproduction unit drive gear 34 The gear portion 17f that meshes with the gear portion 34a is a toothless portion 17f2, and the reproduction mechanism unit 20 is held at the reproduction position P1.
[0068]
Next, the case where the upper tray 4 is moved to the reproduction position from the state shown in FIGS. 9B and 19 will be described. First, a description will be given of a state during which the drive cam 17 rotates counterclockwise from the Tp1 position shown in FIG. 17 to the Tp3 position. Here, as shown in FIG. 15 (b), the gear portion 34a of the second reproduction unit drive gear 34 and the gear portion 17f1 of the gear portion 17f provided on the drive cam 17 are engaged with each other, and the gear portion 34b and the lifting / lowering portion are engaged. The rack 18 a of the rack member 18 is engaged with the rack member 18, and the lifting rack member 18 is moved along the guide groove 1 b of the housing 1 toward the right side of the apparatus. During this time, the gear portion 17e of the drive cam 17 that meshes with the first reproduction unit drive gear 33 is a separation portion 17e3, and the first reproduction unit drive gear 33 is driven by the drive of the second reproduction unit drive gear 34. It only rotates.
[0069]
As shown in FIG. 25, the upper tray 4 meshes with the first tray driving gear 26 and the second tray driving gear 28 at the storage position T2. At this time, the gear portion 25 a of the intermediate gear 25 that meshes with the first tray drive gear 26 maintains the contact position with the toothless portion 17 b 2 of the gear portion 17 b provided on the outer peripheral portion of the drive cam 17, so that the rotational position is changed. keeping.
[0070]
Further, the gear portion 27a of the intermediate gear 27 that meshes with the second tray drive gear 28 maintains contact with the toothless portion 17b2 of the gear portion 17b provided on the outer peripheral portion of the drive cam 17, and the held portion 27c is The rotation position of the intermediate gear 27 is held by maintaining contact with the holding portion 17c1 having a larger diameter than the missing tooth portion 17b2. Thereby, the upper tray 4 is held at the storage position T2.
[0071]
Further, the lower tray 5 meshes with the fourth tray driving gear 32 at the reproduction position T6. The gear portion 31 a of the intermediate gear 31 that meshes with the fourth tray drive gear 32 maintains the rotational position by maintaining contact with the missing tooth portion 17 d 2 of the gear portion 17 d provided on the outer peripheral portion of the drive cam 17. Yes. Thereby, the lower tray 5 is held at the reproduction position T6.
[0072]
When the elevating rack member 18 moves to the right side of the apparatus, the reproduction unit holder 7 and the reproduction mechanism unit 20 are rotated by the rotation provided in the housing 1 because the guide groove 18b and the elevating boss 7a are engaged. According to the guide of the moving guide groove 1a, it is turned downward. As the reproduction unit holder 7 rotates downward, the positioning boss 7c provided integrally with the reproduction unit holder 7 is removed from the positioning hole 5f of the lower tray 5, so that the lower tray 5 becomes movable. When the rotational position of the drive cam 17 reaches Tp3, the reproduction mechanism unit 20 is in a non-reproduction position P2 shown in FIG. The positional relationship between the lifting rack member 18 and the upper tray 4 and the lower tray 5 at this time is as shown in FIG.
[0073]
Subsequently, a state during which the drive cam 17 rotates counterclockwise from the Tp3 position shown in FIG. 17 to the Tp4 position will be described. Here, as shown in FIG. 26, the gear portion 27a of the intermediate gear 27 and the gear portion 17b1 of the gear portion 17b provided on the drive cam 17 mesh with each other, and the upper tray 4 is moved via the second tray drive gear 28. Move from the storage position T2 to the reproduction position T3. Further, the gear portion 31a of the intermediate gear 31 and the gear portion 17d1 of the gear portion 17d provided on the drive cam 17 mesh with each other, and the lower tray 5 is moved from the regeneration position T6 to the storage position T5 via the fourth tray drive gear 32. Move to.
[0074]
Here, the movement operation of both trays will be described with reference to FIG. FIG. 4A shows the positions of both trays at the Tp3 position. From this state, the upper tray 4 is provided in the engagement between the guide grooves 4g on both side surface portions and the tray guide 2a provided in the upper tray storage portion 2, and in the guide groove 4h on the lower surface portion and in the upper tray storage portion 2. It is guided by the engagement with the tray guide 2b, and moves substantially parallel to the upper or lower surface of the apparatus toward the back of the apparatus. On the other hand, as shown in FIG. 4B, the lower tray 5 is guided at the rear end portion of the lower surface by a tray guide 1d having an inclination provided at the rear portion of the housing 1 and moves toward the front side of the apparatus. , Substantially parallel to the upper tray 4.
[0075]
In the state shown in FIG. 6C, the two trays are substantially parallel to each other, and guidance on the side surface portion of the upper tray 4 is provided on the tray guide 2a of the upper tray storage portion 2 and the housing 1. The tray guide 1k is used. On the other hand, the lower tray 5 is engaged with the guide grooves 5g on both side surface portions and the tray guide 3a provided on the lower tray storage portion 3, and on the lower surface guide grooves 5h and the tray guide provided on the lower tray storage portion 3. It is guided by engagement with 3b.
[0076]
The trays reach the state shown in FIG. 5E through the state of FIG. That is, when the rotational position of the drive cam 17 reaches Tp4, as shown in FIGS. 9D and 21, the upper tray 4 is in the reproduction position T3, and the lower tray 5 is in the storage position T5. It will be in the state located. During this time, the gear 17f of the drive cam 17 that meshes with the second reproduction unit drive gear 34 is a toothless portion 17f2, and the reproduction mechanism unit 20 is held at the non-reproduction position P2.
[0077]
Furthermore, the state during which the drive cam 17 rotates counterclockwise from the Tp4 position shown in FIG. 17 to the Tp5 position will be described. Here, as shown in FIG. 15 (c), the gear portion 33a of the first reproduction unit drive gear 33 and the gear portion 17e1 of the gear portion 17e provided on the drive cam 17 are engaged with each other, and the gear portion 33b and the second portion are connected. The gear unit 34a of the reproduction unit drive gear 34 is meshed with and driven to rotate.
[0078]
Here, the second reproduction unit drive gear 34 is rotated in the opposite direction to the rotation of the drive cam 17 from the Tp1 position to the Tp3 position described above. Move to the left side of the device along the groove 1b. During this time, the gear portion 17f of the drive cam 17 that meshes with the second reproduction unit drive gear 34 is a separation portion 17f3, and the second reproduction unit drive gear 34 follows the rotation of the first reproduction unit drive gear 33. Only the driving force is transmitted to the lifting / lowering rack member 18.
[0079]
As shown in FIG. 27, the upper tray 4 meshes with the second tray drive gear 28 at the reproduction position T3. At this time, the gear portion 27a of the intermediate gear 27 that meshes with the second tray drive gear 28 maintains the contact with the toothless portion 17b2 of the gear portion 17b provided on the outer peripheral portion of the drive cam 17, thereby changing the rotational position. keeping. As a result, the upper tray 4 is held at the reproduction position T3.
[0080]
Further, the lower tray 5 is engaged with the third tray driving gear 30 and the fourth tray driving gear 32 at the storage position T5. The gear portion 29 a of the intermediate gear 29 that meshes with the third tray drive gear 30 maintains the rotational position by maintaining contact with the missing tooth portion 17 d 2 of the gear portion 17 d provided on the outer peripheral portion of the drive cam 17. Yes. The gear portion 31a of the intermediate gear 31 that meshes with the fourth tray drive gear 32 maintains contact with the toothless portion 17d2 of the gear portion 17d provided on the outer peripheral portion of the drive cam 17, and the held portion 31c The rotation position of the intermediate gear 31 is held by maintaining contact with the holding portion 17c1 having a larger diameter than the tooth portion 17d2. Thereby, the lower tray 5 is held at the storage position T5.
[0081]
When the lifting rack member 18 moves to the left side of the apparatus, the guide groove 18b and the lifting boss 7a are engaged, whereby the playback unit holder 7 and the playback mechanism unit 20 are rotated by the rotation provided in the housing 1. According to the guide of the moving guide groove 1a, it is rotated upward. As the reproduction unit holder 7 rotates upward, the positioning boss 7c provided integrally with the reproduction unit holder 7 is fitted into the positioning hole 4 of the upper tray 4, and the upper tray 4 is held at the reproduction position T3. The When the rotational position of the drive cam 17 reaches Tp5, the playback mechanism unit 20 is in the playback position P1 shown in FIG. 9E, and the disc 9 placed on the upper tray 4 can be played back. It becomes. The positional relationship between the lifting rack member 18 and the upper tray 4 and the lower tray 5 at this time is as shown in FIG.
[0082]
When the disk on the lower tray 5 is exchanged from the above state, the drive cam 17 rotates counterclockwise from the Tp5 position shown in FIG. At this time, as shown in FIG. 28, the gear portion 17d1 of the gear portion 17d provided on the drive cam 17 and the gear portion 29a of the intermediate gear 29 mesh with each other, and the intermediate gear 29 is rotationally driven.
[0083]
Then, the engagement between the gear portion 29b of the intermediate gear 29 and the gear portion 30a of the third tray driving gear 30 and the engagement between the gear portion 30b of the third tray driving gear 30 and the rack 5c provided on the side surface of the lower tray 5 The lower tray 5 is driven. When the drive cam 17 reaches the Tp6 position, the lower tray 5 becomes the attaching / detaching position T4 shown in FIGS. 9 (f) and 23, and the disk can be exchanged. Further, the lower tray 5 can be moved from the attachment / detachment position T4 to the storage position T5 by the reverse procedure.
[0084]
During this time, the gear portion 17b provided on the drive cam 17 and meshing with the intermediate gear 27 is a toothless portion 17b2, and the upper tray 4 is held at the disc reproduction position T3. At the same time, the gear portion 17e that meshes with the gear portion 33a of the first reproduction unit drive gear 33 is a missing tooth portion 17e2, and the gear portion 17f that meshes with the gear portion 34a of the second reproduction unit drive gear 34 is missing. It is a tooth portion 17f2, and the reproduction mechanism unit 20 is held at the reproduction position P1.
[0085]
As described above, in the present disk loading apparatus, the movement of the upper tray 4, the lower tray 5, and the reproduction mechanism unit 20 is performed by the rotation drive of one drive cam 17, and one rotation of the drive cam 17 is performed. It is configured to be realized in the inside. As a result, it is possible to simplify the configuration of the drive mechanism of the tray and the reproduction mechanism unit, and to simplify the control mechanism of these operations.
[0086]
The cam gear referred to in claim 1 corresponds to the drive cam 17 in the embodiment, the reproducing means moving mechanism corresponds to the lifting rack member 18, and the disk reproducing means corresponds to the reproducing mechanism unit 20.
[0087]
【The invention's effect】
As described above, according to the present invention, it is possible to provide an inexpensive disc loading device without increasing the size of the entire device by simplifying the configuration of the tray driving mechanism and the reproducing mechanism unit.
[0088]
Specifically, a first tray position that can be moved between a first attachment / detachment position where the disk can be attached / detached, a first storage position where the disk is stored and waited, and a first reproduction position where the disk can be reproduced, Mounted on the first tray, a second attachment / detachment position where the disk can be attached / detached, a second storage position where the disk is stored and waited, a second playback position where the disk can be played back, and a first tray A disk reproducing means for reproducing the placed disk or the disk placed on the second tray, and a reproducing means moving mechanism for reciprocating the disk reproducing means between the reproduction position and the non-reproduction position. In this embodiment, the cam gear is provided with a tooth portion and a missing tooth portion on the outer peripheral portion thereof, and the tooth portion of the cam gear outer peripheral portion and the rack provided on the first tray are engaged with the first tray at the first attachment / detachment position and the first Drive between storage positions A first gear that engages with a tooth portion of the outer periphery of the cam gear and a rack provided on the first tray, and a second gear that drives the first tray between a first storage position and a first regeneration position. A third gear that meshes with a tooth portion of the outer periphery of the cam gear and a rack provided on the second tray and drives the second tray between a second attachment / detachment position and a second storage position; and an outer periphery of the cam gear A fourth gear that meshes with a tooth portion of the second tray and a rack provided on the second tray, and drives the second tray between a second storage position and a second regeneration position, a tooth portion of an outer peripheral portion of the cam gear, and the A fifth gear that meshes with a rack provided in the reproducing means moving mechanism, and the cam gear rotates to drive the first gear to the fifth gear, whereby the first tray, the second tray, and Transfer of the disk reproducing means It is trying to control the configuration.
[0089]
Thereby, a series of operations of loading the first tray and the second tray and moving the disc reproducing means can be performed with one cam gear. Therefore, it is possible to reduce the cost by simplifying the operation mechanism and to reduce the size of the apparatus.
[0090]
Further, the movement of the first tray between the first attachment / detachment position and the first reproduction position, the movement of the second tray between the second attachment / detachment position and the second reproduction position, and reproduction of the disc reproduction means. The movement between the position and the non-reproducing position is performed during one rotation of the cam gear.
[0091]
Accordingly, it is possible to grasp the operation state of the apparatus from the rotation angle of the cam gear, and it is possible to simplify the control mechanism of the apparatus.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an external appearance of a disk loading apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view showing an internal structure of the disk loading apparatus.
FIG. 3 is an exploded perspective view showing the structure of each part around the housing.
FIG. 4 is a perspective view showing a structure of a lower tray storage unit.
FIG. 5 is a perspective view illustrating a structure of an upper tray storage unit.
FIG. 6 is a plan view showing two types of disks mounted on the apparatus.
FIG. 7 is a perspective view showing the structure of the upper tray.
FIG. 8 is a perspective view showing a structure of a lower tray.
FIG. 9 is a basic operation diagram schematically showing movement of a tray and a reproduction mechanism unit.
FIG. 10 is a diagram showing an internal configuration of a portion related to a tray and a reproduction mechanism unit.
FIG. 11 is an exploded view showing a structure of a portion related to a tray and a reproduction mechanism unit.
FIG. 12 is a diagram showing a configuration of a portion related to a drive cam.
FIG. 13 is a plan view showing a configuration of a portion related to an upper tray holding mechanism.
FIG. 14 is a plan view showing a configuration of a portion related to a lower tray holding mechanism.
FIG. 15 is a diagram showing a configuration of a portion related to raising / lowering driving of the reproduction mechanism unit.
FIG. 16 is a side view showing a configuration of a tray operation guide mechanism.
FIG. 17 is a plan view showing a configuration of a portion related to the drive cam.
FIG. 18 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 19 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 20 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 21 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 22 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 23 is a plan view showing the rotational position of the drive cam and the positions of each tray, lifting rack member, and the like.
FIG. 24 is a plan view showing the rotational position of the drive cam, the positional relationship between each tray, the lifting rack member, etc., and the meshing state of each part gear.
FIG. 25 is a plan view showing the rotational position of the drive cam, the positional relationship between each tray, the lifting rack member, and the like, and the meshing state of each part gear.
FIG. 26 is a plan view showing the rotational position of the drive cam, the positional relationship between each tray, the lifting rack member, and the like, and the meshing state of each part gear.
FIG. 27 is a plan view showing the rotational position of the drive cam, the positional relationship between each tray, the lifting rack member, and the like, and the meshing state of each part gear.
FIG. 28 is a plan view showing the rotational position of the drive cam, the positional relationship between each tray, the lifting rack member, and the like, and the meshing state of each part gear.
FIG. 29 is a basic operation diagram schematically showing movement of a tray and a reproduction mechanism unit in an example of a conventional disk loading apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2 Upper tray accommodating part 3 Lower tray accommodating part 4 Upper tray 5 Lower tray 7 Playback unit holder 8 Disc holder 9, 10 Disc 13 Motor 14 Pinion gear 15 Intermediate gear 16 Intermediate gear 17 Drive cam 18 Lifting rack member 20 Reproduction Mechanism unit 21 Turntable 22 Pickup 23 Anti-vibration rubber 25, 27, 29, 31 Intermediate gear 26 First tray drive gear 28 Second tray drive gear 30 Third tray drive gear 32 Fourth tray drive gear 33 First playback unit drive Gear 34 Second regeneration unit drive gear

Claims (2)

A first attachment / detachment position where a disk can be attached and detached; a first storage position where the disk is stored and waited; and a first tray movable between a first reproduction position where the disk can be reproduced;
Mounted on the first tray, a second attachment / detachment position where the disk can be attached / detached, a second storage position where the disk is received and waited, a second playback position where the disk can be played back, and a first tray Disc reproducing means for reproducing the disc placed or the disc placed on the second tray;
In a disk loading apparatus comprising: a playback means moving mechanism for reciprocating the disk playback means between a playback position and a non-playback position;
A cam gear provided with a tooth portion and a missing tooth portion on the outer peripheral portion;
A first gear that meshes with a tooth portion of the outer peripheral portion of the cam gear and a rack provided on the first tray and drives the first tray between a first attachment / detachment position and a first storage position;
A second gear that meshes with a tooth portion of the outer peripheral portion of the cam gear and a rack provided on the first tray and drives the first tray between a first storage position and a first regeneration position;
A third gear that meshes with a tooth portion of the outer periphery of the cam gear and a rack provided on the second tray, and drives the second tray between a second attachment / detachment position and a second storage position;
A fourth gear that meshes with a tooth portion of the outer peripheral portion of the cam gear and a rack provided on the second tray and drives the second tray between a second storage position and a second regeneration position;
The cam gear outer peripheral portion and a fifth gear meshing with a rack provided in the reproducing means moving mechanism are provided, and the cam gear rotates to drive the first gear to the fifth gear, thereby A disc loading apparatus for controlling movement of one tray, the second tray, and the disc reproducing means. The movement of the first tray between the first attachment / detachment position and the first reproduction position, the movement of the second tray between the second attachment / detachment position and the second reproduction position, and the reproduction position of the disc reproduction means; 2. The disk loading apparatus according to claim 1, wherein the movement to the non-reproducing position is performed during one rotation of the cam gear.

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