JPH10228707A - Disk player device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk player device capable of performing intermittently rotary motion of a rotary table where two or three information recording disks are mounted on the same plane by using a Geneva gear mechanism at a large angle of more than 90 degrees. SOLUTION: This device is equipped with the rotary table 32 on which three disk loading parts for loading optical disks CDs are arranged radially from the rotary center at equal angles respectively, a table driving mechanism for transmitting driving force from a driving motor 70 via plural gears to the rotary table 32 and driving this table to rotate, a disk rotating mechanism having a turnable 36 capable of chucking the optical disk CD loaded on the disk mounting part 35 and a recording and reproducing mechanism having an objective lens part 37a for reproducing an information signal on this optical disk CD. The table driving mechanism has a table gear 34 provided on the rotary center of the rotary table 32 and the Geneva gear 60 provided integrally with a driving gear to be engaged with the table gear 34 and driven to rotate intermittently by a disk 56, and the rotary table 32 is rotated at the angle of >=120 degrees by one rotation of the disk 56.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of selectively chucking two or three information recording disks placed on a tray table and recording information signals on any of the selected information recording disks. And / or a disc player device capable of performing reproduction.

[0002]

2. Description of the Related Art Conventionally, as an apparatus for recording and / or reproducing information signals using an information recording disk such as an optical disk or a magneto-optical disk as an information recording medium, for example, a rotatable tray table is generally used. 3 on horizontal surface
There has been proposed a tray table type disc player apparatus in which up to five information recording discs are arranged and can be selectively chucked.

[0003] Such a disc player device is composed of a tray table having three to five disc mounting portions provided at equal angular intervals on the same horizontal plane, and a table driving mechanism for intermittently rotating the tray table. A disk rotation mechanism having a spindle motor for chucking and rotating one of the information recording disks mounted on each disk mounting portion of the tray table; and a disk rotation mechanism held and rotated by the spindle motor. An optical pickup device provided to face the information recording surface of the information recording disk, and movable in the radial direction of the disk to write and / or read information signals on the information recording surface. It is configured.

The table driving mechanism of the disc player device includes a motor as a power source, a reduction gear train for rotating the tray table by reducing the rotation speed of the motor to increase the torque, and the like. A Geneva gear mechanism is provided at the end of the power transmission path of the reduction gear train to apply intermittent rotation to the tray table. The Geneva gear mechanism includes a Geneva gear as a follower provided integrally with the rotation center of the tray table, and a circle as an original vehicle having a rotation pin that is removably engaged with a radial groove of the Geneva gear. And a plate (rotating member).

The intermittent rotational motion imparted by the Geneva gear mechanism is such that the Geneva gear is rotated by a predetermined angle by one rotation of the disk to sequentially position the disk mounting portion of the tray table at the chucking position of the information recording disk. In addition, at the chucking position, a relative sliding motion is caused to stabilize the tray table. By moving the arbitrary disc mounting portion to the chucking position by this table intermittent rotating motion and stopping for a predetermined period, the information recording disc mounted on the disc mounting portion can be chucked on the turntable and An optical pickup device can read out an information signal recorded on an information recording surface from a chucked information recording disk or write a new information signal.

[0006]

However, in such a conventional disc player apparatus in which the tray table is rotatable intermittently by using a Geneva gear mechanism, the disk of the Geneva gear mechanism is not provided. Since the tray table is rotated by a predetermined angle by intermittently rotating the Geneva gear in one rotation, it is difficult to move the tray table through a large angle exceeding 90 degrees by one rotation. Driving the tray table 90 degrees or more has the following problems.

[0007] Regarding such a problem, FIG. 17 and FIG.
8 will be described. Geneva gear mechanism 1 shown in FIG.
Rotates the Geneva gear 3 by 90 degrees (1
/ 4 rotation). The Geneva gear mechanism 4 shown in FIG. 18 is configured such that the Geneva gear 6 is rotated 120 degrees (回 転 rotation) by one rotation of the disk 5.

In FIG. 17, the Geneva gear 3 has four radial grooves 7 extending radially in four directions, and a dovetail-shaped dovetail portion 3a is provided between adjacent radial grooves 7.
Are respectively provided, and an arc-shaped slip surface 3b is formed on the outer peripheral surface of each dovetail portion 3a. The disk 2 for rotating the Geneva gear 3 has a protruding portion 2a extending outward in the radial direction, and the tip of the protruding portion 2a is engaged with the radial groove 7 of the Geneva gear 3 so as to be insertable and removable. A rotating pin 8 to be combined is provided. And the rotating pin 8 of the disk 2
On the side, a notch 2b cut in an arc shape is provided to avoid contact with the dovetail 3a of the Geneva gear 3.

According to the Geneva gear mechanism 1 for 90-degree rotation, the diameter Ea1 of the groove inscribed circle E1 at the center of rotation of the Geneva gear 3 is much smaller than the diameter Da1 of the outer circle D1 (Ea1: Da1). {1: 3) is the diameter Da1 of the outer circumference circle D1.
Can be set to be substantially the same as the diameter Fa1 of the rotation locus circle F1 of the rotation pin 8 of the disk 2 (Da1ＤFa1). Therefore, the Geneva gear mechanism 1 for 90-degree rotation, which rotates the Geneva gear 3 回 転 by one rotation of the disk 2, can relatively smoothly transmit the rotational force of the disk 2 to the Geneva gear 3. The diameter Ea1 of the groove inscribed circle E1 at the center of rotation of the Geneva gear 3 is not reduced more than necessary.

On the other hand, as shown in FIG. 18, the following problem occurs in the 120-degree rotation Geneva gear mechanism 4 for rotating the Geneva gear 6 by one third with one rotation of the disk 5. Will be. That is, the Geneva gear 6 has three radial grooves 7 radially extending in three directions while maintaining an equal angular interval, and a dovetail portion 6a is provided between adjacent radial grooves 7, respectively. An arc-shaped slip surface 6b is formed on the outer peripheral surface of the dovetail portion 6a. The disk 5 for rotating the Geneva gear 6 has a protruding portion 5a and a rotating pin 8 like the disk 2, and a pigtail portion 6a is provided on the rotating pin 8 side.
A notch 5b is provided for avoiding contact with the notch.

According to the 120-degree rotation Geneva gear mechanism 4 having such a configuration, it is necessary to rotate the Geneva gear 6 １ ／ by one rotation of the disk 5. Must be extended to near the center of rotation radially inward. Therefore, the diameter Ea2 of the groove inscribed circle E2 at the center of rotation of the Geneva gear 6 is equal to the outer circumferential circle D2.
2 is a very small value compared to the diameter Da2 (Ea2:
Da2 ≒ 1: 5), and the diameter Ea2 of the groove inscribed circle E2 is extremely small as compared with the Geneva gear mechanism 1 for 90-degree rotation shown in FIG.

Moreover, the diameter Fa2 of the rotation locus circle F2 of the rotating pin 8 of the disk 5 for rotating the Geneva gear 6 is approximately twice as long as the diameter Da2 of the outer circle D2 of the Geneva gear 6 (Fa2). ≒ 2Da2) must be set. Therefore,
In the 120-degree rotation Geneva gear mechanism 4, not only a large torque is required to rotate the disk 5, but also because the peripheral speeds of the disk 5 and the Geneva gear 6 are extremely different, 5 cannot be transmitted to the Geneva gear 6 smoothly.

Furthermore, in this kind of conventional disk player apparatus, a support bracket on which a spindle motor, an optical pickup device and the like are mounted is rotated up and down to chuck and release the information recording disk. And a motor for intermittently rotating the tray table are provided separately and independently. Therefore, since a motor for rotating the support bracket and a motor for rotating the tray table are separately required, a large space for installing these motors is required, and the size of the entire apparatus is reduced. This has been a factor that hinders the realization of the technology, and also has the problem that the electric control system becomes complicated.

The present invention has been made in view of such a conventional problem, and a tray table on which two or three information recording disks are placed on the same plane is moved by using a Geneva gear mechanism. A large angle exceeding a degree can be rotated intermittently. It is another object of the present invention to control both the rotation of the tray table and the rotation or parallel movement of the support bracket by one motor.

[0015]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and the like, and in order to achieve the above object, an information recording disk is rotatably supported by an apparatus main body and mounted thereon. Alternatively, a tray table in which three disk mounting portions are radially arranged at an equal angle with respect to the center of rotation, and a table for transmitting a driving force from a driving source via a plurality of gears to rotationally drive the tray table. A drive mechanism, a disk rotation mechanism having a turntable capable of chucking an information recording disk mounted on the disk mounting portion, and recording and / or recording of information signals on the information recording disk rotationally driven by the disk rotation mechanism. Or a recording and reproducing mechanism having a head unit for performing reproduction, and the table driving mechanism includes:
A table gear provided at the center of rotation of the tray table, and a Geneva gear provided integrally with a driving gear meshed with the table gear and intermittently driven to rotate by a rotating member. It is characterized in that the tray table is rotated at least 120 degrees.

According to the present invention, as described above, the rotation amount of the Geneva gear by the disk can be increased by the downstream gear ratio to rotate the tray table by 120 degrees or more, and the drive source Since the rotational force of the motor is transmitted to the tray table by the table driving mechanism having the Geneva gear mechanism including the disk and the Geneva gear, the tray table can be reliably and quickly intermittently rotated.

[0017]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 to 16 show an embodiment of the present invention. FIG. 1 is a plan view showing a tray table and a table driving mechanism of a disk player apparatus of the present invention. FIG. 2 is a plan view of the disk player apparatus of the present invention. FIG. 3 is an exploded perspective view showing a front panel, a main chassis, and a cover panel, FIG. 4 is a perspective view showing a moving tray and a tray table, FIG. 5 is a plan view of a disc player device of the present invention, 6 is a longitudinal sectional view, FIG. 7 is a rear view showing a part of the information recording disk, FIG. 8 is a sectional view showing an information recording disk in a non-chucking state, and FIG. 9 is a sectional view showing an information recording disk in a chucking state. FIG. 10 is a plan view showing a table driving mechanism and a tray traveling mechanism, FIG. 11 is a development view showing an engaged state of the table driving mechanism and the tray traveling mechanism shown in FIG. 10, and FIGS. 12 to 15 are Geneva teeth. Explanatory view for explaining the operation of the mechanism, FIG. 16 is a cam portion development view of the cam member.

The disc player device 10 according to the present embodiment comprises:
This shows an example in which the present invention is applied to a CD player having a three-disc exchange mechanism using an optical disc CD which is a compact disc dedicated to reproduction as an information recording disc. As shown in FIGS. 2 and 3, the disc player device 10 includes a main chassis 12, a front panel 13, a cover panel 14, and the like, and these constitute a device main body 11.

The main chassis 12 has a rectangular bottom plate 12a, a side plate 12b that is continuously raised upward on both sides in the width direction of the bottom plate 12a, and a rear plate that is continuously provided on the rear side of the bottom plate 12a. And a raised rear face plate 12c. At the four lower corners of the bottom plate 12a of the main chassis 12, legs 15 that can be adjusted in the height direction are attached. Further, a guide rail 1 having a concave guide groove 16a extending in the front-rear direction is provided on the upper surface of the bottom plate 12a at a position slightly deviated from the center in the width direction to one side.
6 is attached by fixing means such as fixing screws. At the rear end side of the guide groove 16a of the guide rail 16, a stop member 17 formed of a rubber-like elastic body, a synthetic resin, or another cushioning material is attached.

A front panel 13 is attached to the front of the main chassis 12 by fixing means such as fixing screws. The front panel 13 is formed of a horizontally long lid that is opened on the rear surface, and an upper holding piece 13a and a horizontal holding piece 13b for holding the front part of the cover panel 14 are provided above and on both sides of the opening. ing. This front panel 1
3 has a horizontally long tray insertion slot 1 extending in the left-right direction.
8 are provided. Further, on both sides of the lower surface of the tray insertion port 18, there are provided tray regulating portions 19 for guiding the movable tray 20 in the front-rear direction and preventing the movable tray 20 from moving in the left-right direction. The tray restricting portion 19 has a slit extending in the front-rear direction.
Are engaged.

Further, as shown in FIGS. 2 and 3, a power switch 21 for turning on / off the power supplied from an external power source and a device for executing information reproduction and the like are provided on the front surface of the front panel 13. (For example, a reproduction switch, a fast-forward switch, a pause switch, a stop switch, a tray operation switch, a table rotation switch, etc.), an input state of the operation switch 22, and a reproduction operation state such as a performance based on the input switch. A display unit 23 for displaying other information is provided. As the display unit 23, for example, a display device such as a liquid crystal display can be applied.

Behind the front panel 13, a cover panel 14 is mounted so as to cover the entire upper surface of the main chassis 12. The cover panel 14 includes a rectangular upper surface plate 14a having substantially the same size as the bottom surface plate 12a of the main chassis 12, and a side surface plate 14b that is continuously lowered downward on both left and right sides of the upper surface plate 14a. And A fixing screw 24 showing a specific example of a fixing means in an insertion hole 14 c provided in the side plate 14 b of the cover panel 14.
The cover panel 14 is detachably attached to the main chassis 12 by inserting a screw portion at the tip thereof into a screw hole 12 d provided in the side plate 12 b of the main chassis 12.

As shown in FIGS. 5 to 7, a moving tray 20 is accommodated in the apparatus main body 11 having such a configuration so as to be movable in the front-rear direction. This moving tray 20
As shown in FIG. 4 and the like, has a table support portion 20a forming the front half and a mechanism accommodating portion 20b forming the rear half, and a tray stop portion 20c is formed by a step set therebetween.
Is configured. The table support portion 20a of the movable tray 20 has a size that fits loosely into the tray insertion slot 18, and is inserted into the tray insertion slot 18 from the inside as shown in FIG.

Further, the mechanism accommodating portion 20b of the movable tray 20
At the rear end, as shown in FIG. 7, a guide projection 25 protruding downward is provided. The guide projection 25 of the movable tray 20 is slidably engaged with a guide groove 16 a of a guide rail 16 attached to the bottom plate 12 a of the main chassis 12. Due to the engagement between the guide groove 16a and the guide projection 25 and the engagement between the tray restricting portion 19 and the linear moving piece 20d of the movable tray 20, the movable tray 20 is guided so as to be movable in the forward and backward directions, and is moved in the forward and backward directions. Only linear movement is possible.

The movement of the movable tray 20 to the front side is prevented by the inner end surface of the tray insertion opening 18 with which the tray stop 20c is in contact. Thereby, the moving tray 2
0 of the front panel 13 from the tray insertion opening 18 is prevented. Further, the movement of the movable tray 20 to the rear side is performed by the stop member 17 with which the guide projection 25 abuts.
Blocked by As a result, contact of the movable tray 20 with the rear plate 12c due to the retreat operation is prevented. At the position where the movable tray 20 is most retracted, the front surface of the table support portion 20a is set to be flush with the front surface of the front panel 13.

The mechanism accommodating portion 20b of the movable tray 20
As shown in FIG. 6 and FIG.
6 is rotatably mounted. This running wheel 26
Is a rotating shaft 26 rotatably supported by the moving tray 20.
a, a wheel portion 26b and a worm wheel 26c provided integrally with the rotary shaft 26a, and the wheel portion 26b is provided with an annular groove continuous in the circumferential direction. A tire member 27 made of a friction material such as a rubber-like elastic body or plastic having a relatively large surface friction coefficient is mounted in the annular groove of the wheel portion 26b.

The rotating shaft 26a of the running wheel 26 is supported at both ends by a pair of bearing pieces 20e provided so as to protrude downward in the mechanism accommodating portion 20b of the movable tray 20. Projections 20f extending downward are provided outside the bearing pieces 20e, respectively.
The running wheel 26 is prevented from coming off by a retaining ring 28 screwed to the lower end of 0f. A worm 30 fitted and fixed to a rotating shaft of a traveling motor 29 is rotatably meshed with the worm wheel 26c of the traveling wheel 26.

The traveling motor 29 is mounted on the upper surface of the mechanism accommodating portion 20b with the rotating shaft directed downward, and the rotating shaft projects downward through the floor of the mechanism accommodating portion 20b. A worm 30 is attached to the protrusion. The rotational force of the traveling motor 29 is
0 to the traveling wheels 26 via the worm wheel 26c, and the moving tray 20 is linearly moved forward or rearward in accordance with the rotation direction of the motor 29.

As shown in FIG. 4 to FIG.
A circular concave portion 31 is provided on the upper surface of the table support portion 20a.
The tray 31 is accommodated in the recess 31. In order to rotatably support the tray table 32 on the movable tray 20, a support shaft 31a protruding upward is provided at the center of the concave portion 31 of the table support portion 20a. A cylindrical tube shaft portion 32a provided at the center of the tray table 32 is provided on the support shaft 31a.
Are rotatably fitted to each other so that the tray table 32
Are rotatably supported by the movable tray 20.
The tray screw 32 is prevented from coming out of the upper direction by the mounting screw 33a into which the screw portion is screwed to the tip of the support shaft 31a and the washer 33b installed inside the screw.

The tray table 32 is formed of a disk-shaped member having a size capable of arranging three optical discs CD on the same plane, and the center of the tray table 32 is formed so that the above-mentioned cylindrical shaft portion 32a projects downward. Is provided. A table gear 34 is provided concentrically and integrally on the lower surface of the tray table 32 and outside the cylindrical shaft portion 32a. On the upper surface of the tray table 32, at three positions on the same circumference centered on the cylindrical shaft portion 32a, disk mounting portions 35 for mounting and storing the optical disk CD are arranged at equal angular intervals. ing.

The disc mounting portion 35 includes a plurality of types of optical discs having different sizes, for example, an optical audio disc having a diameter of 12 cm as a large-diameter optical disc,
A large-diameter concave portion 35a and a small-diameter concave portion 35b are provided concentrically so that an optical audio disk having a diameter of 8 cm can be accommodated as a small-diameter optical disk. The small-diameter concave portion 35b is formed so as to further dug the central portion of the large-diameter concave portion 35a. Therefore, each of the disk mounting portions 35 can store either one of a 12 cm optical disk and an 8 cm optical disk so as to face down, and the tray table 32 as a whole accommodates up to three compact disks CD. Is done.

Further, each of the disk mounting portions 35 is provided with an opening 38 which penetrates the tray table 32 in the vertical direction. This opening hole 38 has a large-diameter concave portion 35.
a or a turntable 36 for chucking the optical disc CD accommodated in the small-diameter recess 35b, and an information signal recorded on an information recording surface of the optical disc CD chucked and rotated by the turntable 36. The objective lens portion 37a of the optical pickup device 37 for reading out is inserted. The opening hole 38 extends from the center of the disc mounting portion 35 toward one side in the tangential direction, and its tip is formed so as to reach the outside of the large-diameter concave portion 35a through the small-diameter concave portion 35b and the large-diameter concave portion 35a. Have been.

A flat plate-shaped arm bracket 40 is provided above the rear center of the tray table 32. The base end of the arm bracket 40 is fixed to a support column 41 erected at the center of the rear side of the mechanism accommodating portion 20b of the movable tray 20 by a fixing screw 41a. The tip of the arm bracket 40 extends toward the center of the table support 20a, and a chucking plate 42 is rotatably supported at the tip.

The chucking plate 42 includes a body portion 42a vertically penetrating through a hole provided in the arm bracket 40, a flange-shaped pressing plate 42b provided at a lower end of the body portion 42a, and a body portion 42a. It also has a flange-like retaining plate 42c provided at the upper end.
Therefore, the chucking plate 42 can move in the vertical direction between the holding plate 42b and the retaining plate 42c. Further, as shown in FIG. 9, a coin-shaped magnet net 43a and a magnetic body 43b made of an iron piece or the like having the same shape are adsorbed to each other in the body portion 42a, and slightly move vertically and radially. It is stored as possible.

Below the chucking plate 42 and below the tray table 32, a turntable 36 attached to the tip of a rotating shaft 44a of a spindle motor 44 is provided. The turntable 36 is formed of a support plate 36a provided around the center hole provided at the center of the optical disk CD, and a magnetic material provided at the center of the support plate 36a and inserted into the center hole to position the optical disk CD. And a fitting body 36b.
An optical disk CD is interposed between the turntable 36 and the chucking plate 42, and the front end of the fitting body 36b is fitted to the center of the holding plate 42b, so that the magnet 43a is attracted to the fitting body 36b and CD
Is chucked to the turntable 36. As a result, the optical disc CD is integrated with the turntable 36, and is integrally rotated by the drive of the spindle motor 44.

The spindle motor 44 to which the turntable 36 is fixed is fixed to a lower surface of the sub-chassis 45 formed by punching a steel plate or the like, with its rotating shaft 44a facing upward. Installed by. The spindle motor 44 constitutes a disk rotating mechanism that drives the optical disk CD to rotate at a predetermined speed.

The sub-chassis 45 has a rectangular opening 45a inside thereof, and an optical pickup device 37 is disposed in the opening 45a. The optical pickup device 37 includes an objective lens unit 37 showing a specific example of a head unit that reads out information signals recorded on an optical disc CD.
a, and a slide base 37b slidably supported by the sub-chassis 45 while holding the objective lens portion 37a.
Etc. A semiconductor laser, a beam splitter, a collimator lens and other lenses, a photodetector, and the like are attached to a slide base 37b of the optical pickup device 37. This optical pickup device 37,
A signal processing circuit (not shown) constitutes a reproducing mechanism showing one embodiment of a recording and / or reproducing mechanism.

Further, in connection with the optical pickup device 37, a rack-pinion type feed mechanism is provided for moving the optical pickup device 37 in the radial direction of the optical disk CD. The feed mechanism includes a feed motor 46 as a drive source, a guide shaft that slidably supports the slide base 37b in cooperation with the sub-chassis 45, a rack member integrally provided on the slide base 37b,
A feed gear train and the like for moving the optical pickup device 37 by transmitting the rotational force of the feed motor 46 to the rack member are provided. By driving the feed motor 46 of the feed mechanism, the rotational force is transmitted to the rack member via the feed gear train, and the optical pickup device 37 approaches the turntable 36 in accordance with the rotation direction of the feed motor 46. Or it is moved so that it may separate.

The sub-chassis 45 on which the turntable 36 and the optical pickup device 37 are mounted as described above.
Is attached to the upper surface of a support bracket 50 formed of a rectangular frame by fixing means such as fixing screws. As shown in FIGS. 1 and 5, the support bracket 50 has a pair of shaft portions 50a provided so as to protrude outward on both sides of a base end on one side in the longitudinal direction, and the base end. And a cam pin 51 provided so as to protrude outward at a turning-side tip portion located on the opposite side of the cam pin 51. The cam pin 51 has a sliding portion formed in a spherical shape in order to reduce sliding friction resistance, and the sliding portion is slidably engaged with the cam groove 54 of the cam member 52. The sliding portion of the cam pin 51 is, for example, a rolling element rotatably held by a shaft portion, so that the sliding friction resistance can be further reduced.

The support bracket 5 having such a configuration
Numeral 0 is arranged so that the left and right shaft portions 50a are arranged outside, the cam pins 51 are located inside, and the longitudinal direction extends in the left and right direction intersecting the front and rear direction which is the moving direction of the moving tray 20. . By supporting the left and right shaft portions 50a on the bearing portion of the movable tray 20, the support bracket 50 is rotatable vertically around the shaft portion 50a in the mechanism accommodating portion 20b of the movable tray 20. . Thereby, the support bracket 50 can take a non-chucking state in which the support bracket 50 is inclined downward and forward as shown in FIG. 8 and a chucking state in which the optical disc CD is chucked by being supported horizontally as shown in FIG.

To rotate the support bracket 50 in the vertical direction, a cylindrical cam member 52 is rotatably provided in the mechanism accommodating portion 20b. The cam member 52 has a rotating shaft portion 52a and a body portion 52b provided concentrically with each other, and an upper partition piece 53a and a lower partition piece 53b vertically move on the outer peripheral surface of the body portion 52b located on the outside. , A cam groove 54 is provided. At the upper end of the cam member 52, a disk 56 as a rotating member forming one of the Geneva gear mechanism 55 is provided integrally, and at the lower end of the cam member 52, the cam member 52 is rotated. A cam gear 57 for driving is provided integrally.

The cam groove 54 of the cam member 52 is
Has a shape as shown in the developed view of the cam portion. FIG.
In the figure, reference symbol CS denotes a reference line indicating the reference position of the cam groove 54. Before and after the cam groove reference line CS, a reference angle CS is provided with a predetermined angular range (90 ° in this embodiment) in the circumferential direction. A lower horizontal portion 54a extending in the direction is provided.
A predetermined angular range (60 ° in this embodiment) is set in the circumferential direction at a high position on the opposite side of the lower horizontal portion 54a of the cam groove 54.
And an upper horizontal portion 54b extending in the horizontal direction. On the left and right sides connecting the upper horizontal portion 54b and the lower horizontal portion 54a of the cam groove 54, a slope portion 54c is formed in a predetermined angle range (105 ° in this embodiment). It is provided in.

With the cam groove 54 having such a shape, the support bracket 50 having the cam pin 51 engaged with the cam groove 54 can be selectively switched between the inclined position shown in FIG. 8 and the substantially horizontal position shown in FIG. Can be taken. When the cam pin 51 is guided by the cam groove 54 and moves in the vertical direction, the support bracket 50 is moved to the left and right shaft portions 50.
It is vertically rotated about a.

The posture in which the support bracket 50 is inclined is within a range of 90 ° in which the cam pin 51 is located in the lower horizontal portion 54a of the cam groove 54. In this state, the distal end side of the support bracket 50 moves to the lowest position. ing. At this time,
The turntable 36 and the objective lens portion 37a of the optical pickup device 37 are both retracted downward from the opening 38 of the disc mounting portion 35 located at the chucking position of the tray table 32. Therefore, in the inclined state of the support bracket 50, even if the tray table 32 is rotated, it does not come into contact with the turntable 36, the objective lens portion 37a, and the like.

On the other hand, the substantially horizontal posture of the support bracket 50 is such that the cam pin 51 is
, And in this state, the distal end side of the support bracket 50 has moved to the uppermost position. At this time, the turntable 36 and the optical pickup device 3
The objective lens portion 37a of No. 7 is inserted from below into the opening 38 of the disc mounting portion 35 at the chucking position of the tray table 32. Then, the optical disk CD is chucked on the turntable 36, and the objective lens portion 37a faces the information recording surface of the optical disk CD, so that the information signal can be reproduced. Thus, based on the change in the attitude of the support bracket 50, the turntable 36 and the chucking plate 42 perform the chucking of the optical disc CD and the release operation thereof.

As shown in FIGS. 8 to 15, a disk 56 provided integrally with the cam member 52 has a protruding portion 56a protruding radially outward and a cylindrical portion rotatably contacting a Geneva gear 60 described later. 56b, and a rotating pin 58 protruding upward is provided at the tip of the protruding portion 56a. A cut-out portion 56c cut out in an arc shape is provided on the rotary pin 58 side of the cylindrical portion 56b in order to avoid contact with the dovetail portion 3a of the Geneva gear 3.

The cam member 52 having such a configuration is
As shown in FIG. 11, the rotary shaft 52 a is fitted to a support shaft 59 erected on the movable tray 20 to be rotatably supported. A Geneva gear 60, which is the other of the Geneva gear mechanism 55, fits the cylindrical shaft portion 62 to a support shaft 61 erected on the movable tray 20, corresponding to the disk 56 integrated with the cam member 52. It is rotatably supported by this. On the upper surface of the Geneva gear 60, a drive gear 63 meshed with a table gear 34 provided at the center of the tray table 32 is provided integrally.

As shown in FIGS. 10 and 11, the Geneva gear 60 vertically partitions the drive gear 63 and also has a partition plate 64 having an outer peripheral edge protruding like a flange, and vertically penetrates a central portion. And the cylindrical shaft portion 62 provided so as to perform The Geneva gear 60 has four radial grooves 6 extending radially in the radial direction and formed at equal angular intervals.
5, and between the adjacent radial grooves 65, dovetail portions 60a each having a dovetail shape are provided. Thus, Geneva gear 60 has four dovetails 60a, each dovetail 60a
Are provided with arc-shaped slip surfaces 60b, respectively.

The rotary pin 58 of the disk 56 is removably engaged with the radial groove 65 of the Geneva gear 60, and the cylindrical portion 56b of the disk 56 slides on the sliding surface 60b of the dovetail portion 60a. Movably contacted. Due to the rotation of the disc 56, the rotating pin 58 enters the radial groove 65 to rotate the Geneva gear 60 by a predetermined angle, and then comes out of the radial groove 65, and at the same time, the cylindrical portion 56b comes into contact with the sliding surface 60b. And keep spinning. Therefore, the disk 5
6, the Geneva gear 60 makes a quarter turn, and while the rotating pin 58 is disengaged from the radial groove 65 and is disengaged, the Geneva gear 60 is stopped by the cylindrical portion 56b and remains stationary.

In order to transmit the rotation of the Geneva gear 60 to the tray table 32 in an enlarged manner, in this embodiment, the gear ratio between the table gear 34 and the drive gear 63 is set to be 3 to 4. By setting the gear ratio between the table gear 34 and the drive gear 63 to 3: 4,
The table gear 34 is rotated by ３ based on the rotational movement of the Geneva gear 60 which is rotated by １ ／ by one rotation of the disk 56. As a result, the tray table 32 integral with the table gear 34 is rotated by one rotation of the disk 26 to 1/3 (=
(1/4 × 4/3) rotation.

As shown in FIGS. 10 to 15, a first intermediate gear 66 is meshed with the cam gear 57 integral with the cam member 52, and a second intermediate gear 67 is engaged with the first intermediate gear 66. It is formed integrally. This second intermediate gear 67
Is meshed with a third intermediate gear 68, and a fourth intermediate gear 69 is formed integrally with the third intermediate gear 68. The fourth intermediate gear 69 has an output gear 71 fixed to a rotating shaft 70a of a drive motor 70 as a drive source.
Are engaged. The drive motor 70 has a rotating shaft 70
It is attached to the moving tray 20 by a fixing means such as a fixing screw in a state where a is directed downward.

The first and second intermediate gears 66 and 67 are
It is rotatably supported by a pivot 72 erected on the movable tray 20. Then, the third and fourth intermediate gears 68, 69
Is rotatably supported by a pivot 73 which is also provided upright on the movable tray 20.

The disk player device 10 having such a configuration is used, for example, in the following manner so that the three optical disk CDs mounted on the three disk mounting portions 35 of the tray table 32 can be used. , A desired one optical disc CD is selected and reproduced, and information reproduction such as music performance can be executed.

First, after the power switch 21 is turned on to supply power to the electric system, the front panel 13 of the apparatus main body 11 is turned on.
Of the operation switches disposed on the front of the device, the tray operation switch for moving the movable tray 20 forward is turned on. As a result, the traveling motor 29 attached to the mechanism accommodating portion 20b set at the rear of the movable tray 20 is driven, and the rotational force of the traveling motor 29 is fixed to the rotating shaft.
From the worm wheel 26c of the traveling wheel 26. As a result, the rotating shaft 2 together with the worm wheel 26c
The wheel part 26b provided integrally with 6a is rotationally driven, whereby the tire member 27 is integrally rotated.

In this case, the material of the tire member 27 is made of a material having a sufficiently large friction coefficient (for example, silicon rubber), and the tire member 27 is in contact with the support surface of the main chassis 12. Therefore, traveling wheel 2
6 is reliably transmitted to the support surface of the main chassis 12, and the movable tray 20 can be easily moved by the reaction force from the support surface. Moreover, the moving tray 20
The front end of the moving tray 20 slidably engages a linearly moving piece 20 d extending linearly in the front-rear direction with a tray restricting portion 19 provided in the tray insertion opening 18 of the front panel 13. The guide groove 25 of the guide rail 16 attached to the support surface of the main chassis 12
6a so that the movable tray 20 can be linearly moved in the front-rear direction with respect to the apparatus main body 11.

As a result, even when the traveling force by the traveling wheels 26 is relatively small, the movable tray 20 is guided by the guide rails 16 and the guide projections 25 and relatively straightforwardly and reliably in the front-rear direction. You can move. By moving the movable tray 20 forward, as shown in FIG. 2, the front of the table support 20a and the front of the tray table 32 rotatably supported by the table support 20a move the tray insertion opening 18 into place. , And two disc mounting portions 35 provided on the tray table 32 are exposed in front of the apparatus main body 11.

Then, the optical discs CD are mounted on the two disc mounting portions 35 of the tray table 32 exposed in front of the apparatus main body 11, respectively. And the device body 1
When the optical disc CD is to be mounted on the remaining one of the disc mounting portions 35 of the tray table 32 hidden in the tray 1, for example, the table rotation switch is operated to move the tray table 32 by one pitch (120 °). Just rotate.

In this case, when the drive motor 70 is driven to rotate by operating the table rotation switch, FIGS.
As shown in the figures, the rotational force is changed from the output gear 71 fixed to the rotating shaft 70a to the fourth intermediate gear 69, the third intermediate gear 6 or the like.
8 and transmitted from the first intermediate gear 66 to the cam gear 57 via the second intermediate gear 67. Thereby, the cam gear 57
The cam member 52 and the disk 56 integrated with the rotary member are driven to rotate, and the rotational force is transmitted from the disk 56 to the Geneva gear 60.

First, as shown in FIG. 12, assuming that the rotating pin 58 of the disk 56 is located at the entrance of one radial groove 65 of the Geneva gear 60, the disk 56 It shall rotate clockwise. As a result, when the rotating pin 58 enters the radial groove 65, the rotational force of the rotating pin 58 presses the side surface of the dovetail portion 60 a located forward in the rotating direction, and the pressing force from the side causes the Geneva gear 60. Is rotated clockwise in FIG. At this time, since the length from the rotation center of the disk 56 to the rotation pin 58 is not changed, the rotation pin 58 moves the adjacent dovetail portion 6 in accordance with the increase in the rotation angle of the Geneva gear 60.
Oa is guided deeply into the radial groove 65 by being guided by both side surfaces.

Then, as shown in FIG.
8 is moved in the radial direction grooves 65 on the inside and reaches the line connecting the rotational center O _B of the rotation center O _A and the Geneva wheel 60 of the disc 56, the amount of intrusion rotation pin 58 is maximized, Geneva gear 60 is rotated by の of one pitch. Thereafter, the moving direction of the rotation pin 58 is reversed, and the rotation pin 58 moves outward so as to exit the radial groove 65. At this time,
Both outer ends of the dovetail portion 60a on both sides of the radial groove 65 move toward the cylindrical portion 56b of the disk 56.
6b is provided with a cutout portion 56c, and the tip of the dovetail portion 60a passes through the cutout portion 56c, so that the rotation of the Geneva gear 60 is not hindered.

Next, as shown in FIG.
Moves outside the radial groove 65 to the entrance,
The Geneva gear 60 is further rotated by の of one pitch.
Therefore, the Geneva gear 60 is moved 90 degrees from the rotation start position.
° Rotation.

Thereafter, as shown in FIG. 15, when the rotating pin 58 completely comes out of the radial groove 65 by further rotation of the disk 56, the rotating force of the rotating pin 58 is not transmitted to the Geneva gear 60, and Cylindrical part 56 of disk 56
The outer peripheral surface of b comes into sliding contact with the sliding surface 60b at the tip of the dovetail portion 60a. As a result, the Geneva gear 60 is in a stationary state, and is held at a position where the rotating pin 58 has exited the radial groove 65. Therefore, the Geneva gear 60 is
The rotary pin 58 is driven to rotate only while sliding in the radial groove 65, and is rotated by ４ by one rotation of the disk 56.

As described above, when the Geneva gear 60 rotates 1/4, the table gear 34 meshed with the drive gear 63 integrated therewith is driven to rotate in accordance with the gear ratio with the drive gear 63. At this time, the table gear 34 and the drive gear 63
Is set to 3: 4, the driving gear 6
The table gear 34 is rotated by 1/3 rotation by 3/4 rotation. As a result, the tray table 32 integrated with the table gear 34 is rotated by 1/3, so that the disk mounting portion 35 moves by one pitch, and the disk mounting portion 35 hidden in the apparatus main body 11 rotates forward. It is displaced and is exposed on the front side of the apparatus main body 11.

Incidentally, simultaneously with the rotation operation of the tray table 32, the support bracket 50 on which the optical pickup device 37 and the like are mounted is vertically rotated.
This operation is the same as the chucking operation of the optical disk CD described later, and will be described in the description of the chucking operation.

In the case of the present embodiment, the disk mounting portion 3
5 has a two-stage structure of a large-diameter concave portion 35a and a small-diameter concave portion 35b, so that a 12-cm optical disc CD is placed in all of the large-diameter concave portions 35a of the three disk mounting portions 35 or all the small-diameter concave portions 35a. An 8 cm optical disc CD may be placed on 35 b, or 12 cm and 8 cm optical disc CDs may be mixed and placed on three disc placement sections 35.

Next, the front of the movable tray 20 is pushed by hand or the tray operation switch is operated again to return the movable tray 20 to the inside of the apparatus main body 11. Thereafter, the user selects an optical disc CD for which reproduction is desired, and addresses the address of the disc mounting portion 35 on which the optical disc CD is mounted (for example, the first to third addresses are previously assigned to the three disc mounting portions 35). An address number is assigned.) With the address input switch of the operation switch 22 and the reproduction start switch is turned on.

Thus, the selected disk mounting unit 3
The display such as the address number 5 and the start of reproduction is displayed on the display unit 23. At the same time, the position of the tray table 32, that is, the address of the disk mounting portion 35 at the chucking position is detected by a detecting means such as a sensor or a detecting switch.

As a result, the disc mounting portion 35 on which the selected optical disc CD is mounted is turned on the turntable 36.
When the chucking position is above the chucking position, the operation is directly shifted to the chucking operation. On the other hand, when the selected optical disk CD is mounted on the disk mounting portion 35 other than the chucking position,
5 is moved to the chucking position.
Next, the operation shifts to a chucking operation.

Next, the chucking operation of the optical disc CD will be described. As described above, when the front half of the movable tray 20 is protruding out of the tray insertion opening 18 of the apparatus main body 11 or when the movable tray 20 is housed in the apparatus main body 11 but is in a state before chucking, FIG. 8
As shown in FIG. 11, the support bracket 50 on which the optical pickup device 37, the spindle motor 44, and the like are mounted is in a state inclined forward and downward. That is, the cam pin 51 provided at the tip of the support bracket 50 is
It is located in the lower horizontal portion 54a of the cam groove 54 provided in the cam member 52. Therefore, the turntable 36 fixed to the tip of the rotation shaft 44a of the spindle motor 44 and the objective lens portion 37a of the optical pickup device 37 are connected to the opening 38 of the disc mounting portion 35 at the chucking position of the tray table 32. It is in a state where it has escaped and retreated downward.

When the cam member 52 is rotated from this state, the cam pin 51 is rotated by the rotation of the cam groove 54 so that the cam pin 51 is rotated.
4c, and the cam pins 51 move along the slope 54c.
Is lifted. Therefore, the support bracket 50 is rotated upward about the shaft portion 50a in accordance with the amount of rise of the cam pin 51, and as shown in FIG. 9, when the cam pin 51 moves to the upper horizontal portion 54b, the support bracket 50 is moved. It will be in a substantially horizontal state.

At this time, when the support bracket 26 is turned upward, the turntable 36 is gradually pushed up in accordance with the amount of the lift, and the turntable 36 is placed on the optical disc CD mounted on the disc mount 35. Approach from below. Then, the fitting body 36b of the turntable 36
Enters the center hole of the optical disc CD from below and pushes up the optical disc CD in the fitted state. In conjunction with this, the chucking plate 42 located above the turntable 36 is attracted to the turntable 36 by the attraction force of the magnet 43a built therein.

As a result, the optical disc CD is sandwiched between the turntable 36 and the chucking plate 42 from above and below, whereby the chucking operation is completed. As a result, the drive of the drive motor 70 is stopped, and the cam member 52 is not rotated. Therefore, the tray table 32 and the support bracket 50 are both fixed. At this time, the objective lens portion 37a of the optical pickup device 37 enters the opening 38 of the disc mounting portion 35 and approaches the information recording surface of the optical disc CD.

Around this time, the spindle motor 44 is driven to rotate, and the optical disk CD chucked on the turntable 36 is rotated at a predetermined rotation speed. Furthermore,
The feed motor 46 is driven, and the optical pickup device 37
Is moved in the radial direction of the optical disc CD, and the objective lens section 37a reads an information signal recorded on the information recording surface of the optical disc CD. Thereby, the objective lens unit 37
The information read at a is reproduced via a reproduction mechanism including the optical pickup device 37, and music reproduction and the like are executed.

Thereafter, when the reproduction performance ends, the drive of the spindle motor 44 and the feed motor 46 is stopped, and the drive motor 70 is driven to rotate the cam member 52 in the same direction. Thereby, the cam pin 51 of the support bracket 50 exits the upper horizontal portion 54b of the cam groove 54, moves down the slope 54c, and moves to the lower horizontal portion 54a. As a result, the posture of the support bracket 50 changes from the substantially horizontal state shown in FIG. 9 to the inclined state shown in FIG.

At this time, the turntable 36 is gradually pulled downward by the downward rotation of the support bracket 50. Thus, the turntable 36 is separated from the chucking plate 42 against the attraction force of the magnet 43a. Then, the turntable 36 and the objective lens portion 37a fall out from the opening 38 of the disc mounting portion 35 downward. As a result, chucking of the optical disk CD by the turntable 36 or the like is released, and the optical disk CD is left in the original disk mounting portion 35. Thereby, the rotation operation of the next one pitch of the tray table 32 becomes possible.

As described above, the present invention is not limited to the above embodiment. For example, in the above embodiment, three optical disks are arranged on the plane of the tray table 32, and the three optical disks are placed. Although an example of reproducing an arbitrary one of the optical disks has been described, the number of optical disks that can be mounted may be two. For example, when a two-changer disk player device is configured, it can be easily dealt with by setting the gear ratio between the table gear 34 and the drive gear 63 in the above embodiment to 2: 1. Further, in both the two-changer and three-changer disc player apparatuses, the number of radial grooves of the Geneva gear 60 of the Geneva gear mechanism 55 and the gear ratio between the table gear 34 and the drive gear 63 are appropriately set. Thereby, the tray table 32 can be surely rotated by １ ／ rotation or ２ rotation.

Further, in the above-described embodiment, an example in which a read-only optical disk CD is used as an information recording disk has been described. The present invention can be applied to a disc player device dedicated to recording or a disc player device for both recording and reproduction. Furthermore, an example has been described in which the optical disc is applied to a read-only CD player in which the optical discs can be arranged on the tray table 32 in a plane direction. It is.

Further, in the above-described embodiment, an example has been described in which the support bracket 50 is configured to perform chucking by rotating the support bracket 50 around its shaft portion 50a to change the posture. It is also possible to adopt a configuration in which the attitude is changed by moving the tray in parallel with the tray table 32, thereby chucking the information recording disk. Thus, the present invention can be variously modified without departing from the spirit thereof.

[0079]

As described above, according to the present invention,
The Geneva gear mechanism is interposed in the table driving gear train that transmits the torque of the motor to the tray table, and the rotation angle of the Geneva gear is enlarged by meshing the gears, so that the disk is rotated by one rotation of the disk. Using a Geneva gear mechanism that makes it difficult to set the rotation angle of the Geneva gear at one pitch to 90 ° or more, the tray table can be rotated at an angle of 120 ° or more at one pitch. Accordingly, since the rotation of the motor is driven by the table driving mechanism having the Geneva gear mechanism including the disc and the Geneva gear, the tray table can be quickly and reliably intermittently rotated, and the reproducing operation can be performed. It is possible to provide a disc player device in which the tray table is not liable to be erroneously rotated at the time.

A cam groove is provided on a disk forming a part of the Geneva gear mechanism, and a support bracket having a cam pin slidably engaged with the cam groove is movably supported on the apparatus body. Therefore, two operations, namely, a rotation operation for intermittently driving the tray table to rotate, and an operation for moving the support bracket on which the turntable and the optical pickup device are mounted to chuck and release the disk are performed by one operation. Motor. Therefore, a space for installing the motor can be reduced, the structure of the electric circuit and the like can be simplified, the number of parts used can be reduced, and the operation control is easy and the disk player device can be manufactured at low cost. Can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view showing a tray table, a table driving mechanism, and the like according to an embodiment of a disc player device of the present invention.

FIG. 2 is a perspective view showing one embodiment of the disc player apparatus of the present invention, in which a front half of a tray table or the like is protruded from a tray insertion opening.

FIG. 3 is an exploded perspective view showing a front panel, a main chassis, and a cover panel according to the disc player device of the present invention.

FIG. 4 is a perspective view showing a moving tray and a tray table according to the disc player device of the present invention.

FIG. 5 is a plan view showing a moving tray, a tray table, and the like by cutting off an upper half of a device main body of the disc player device of the present invention.

FIG. 6 is a side view showing a cross section of a central portion of the disc player device of the present invention.

FIG. 7 is a rear view showing a cross section of a rear portion of the disc player device of the present invention.

FIG. 8 is an explanatory view for explaining the operation of the disk rotating mechanism according to the disk player apparatus of the present invention, and is a partially sectional view showing a state of the information recording disk before chucking.

FIG. 9 is an explanatory view for explaining the operation of the disk rotating mechanism according to the disk player apparatus of the present invention, and is a partially sectional view showing a state after chucking of the information recording disk.

FIG. 10 is a plan view showing a power transmission system of a disk rotating mechanism according to the disk player device of the present invention.

FIG. 11 is a side view showing a power transmission system of a disk rotating mechanism according to the disk player apparatus of the present invention.

FIG. 12 is a diagram illustrating a Geneva gear mechanism according to the disc player device of the present invention, in which a rotary pin of a disk is located outside a radial groove of the Geneva gear.

FIG. 13 is a view showing a Geneva gear mechanism according to the disc player apparatus of the present invention, in which a rotary pin of a disk has moved to the innermost side of a radial groove of the Geneva gear.

FIG. 14 shows a Geneva gear mechanism according to the disc player apparatus of the present invention, and is an explanatory view showing a state in which a rotating pin of a disk has returned outside a radial groove of the Geneva gear.

FIG. 15 is a view showing a Geneva gear mechanism according to the disc player apparatus of the present invention, in which a rotary pin of a disk protrudes out of a radial groove of the Geneva gear.

FIG. 16 is a development view of a cam portion showing a shape of a cam groove of a cam member according to the disc player device of the present invention.

FIG. 17 is an explanatory diagram showing a Geneva gear mechanism that rotates the Geneva gear by ４ rotation by one rotation of the disk.

FIG. 18 is an explanatory view showing a Geneva gear mechanism that rotates a Geneva gear by １ ／ by one rotation of a disk.

[Explanation of symbols]

10 disc player device, 11 device body, 1
2 Main chassis, 13 front panel, 14 cover panel, 18 tray insertion port, 20 moving tray,
32 tray table, 34 table gear, 3
5 disk mounting part, 36 turntable, 37
Optical pickup device, 37a objective lens section (head section), 38 opening hole, 42 chucking plate, 44 spindle motor, 46 feed motor,
50 support bracket, 51 cam pin, 52 cam member, 54 cam groove, 55 Geneva gear mechanism,
56 disk (rotating member), 57 cam gear, 58
Rotating pin, 60 Geneva gear, 63 drive gear, 6
5 radial groove, 70 drive motor, CD optical disk (information recording disk)

Claims (5)

[Claims] 1. A tray table rotatably supported by an apparatus main body and having two or three disk mounting portions on which an information recording disk is mounted are radially arranged at an equal angle with respect to a rotation center; A table driving mechanism for transmitting a driving force from a driving source via a plurality of gears to rotate the tray table; and a turntable capable of chucking an information recording disk mounted on the disk mounting portion. A disk rotating mechanism having a recording / reproducing mechanism having a head unit for recording and / or reproducing information signals on the information recording disk rotated and driven by the disk rotating mechanism. A table gear provided at the center of rotation of the tray table and a driving gear meshed with the table gear are provided integrally with a rotating member. And a Geneva gear driven intermittently rotated Te, 120 the tray table by one rotation of the rotary member
A disc player device which is rotated by at least degrees. 2. The disc player device according to claim 1, wherein the disc mounting portion is mounted on the tray table.
A disc player device provided at three places at equal angles of degrees. 3. The disc player device according to claim 1, wherein said tray table is provided with said table gear integrally on a back surface of a center of rotation of said tray table. 4. The disk player device according to claim 1, wherein the Geneva gear of the table driving mechanism has four radial grooves radially provided at an equal angle of 90 degrees, and one of the rotating members. A disk player device, wherein the Geneva gear is rotated by 1/4 with respect to rotation, and the gear ratio between the drive gear and the table gear is set to 4: 3. 5. The disk player device according to claim 1, wherein the disk rotating mechanism has a support bracket that supports the turntable and the head portion and that is supported rotatably with respect to the device main body. A cam pin is provided at the rotation-side tip of the support bracket, and a cam groove in which the cam pin is slidably engaged is provided integrally with the rotating member. A disc player device wherein a pivoting motion is applied to the support bracket to chuck the information recording disc on the turntable.