JPH0721906B2 - Disk player - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disk player that continuously reproduces a laser disk recorded on both sides of a video signal and an audio signal, for example.

[Summary of the Invention] According to the present invention, in a disk player, a disk drive device for placing and rotating a disk such as a disk-shaped laser disk is arranged in an opening formed on one side surface of a player body, and the opening is opened and closed. A lid body is rotatably supported on the player body, and is rotatable between the opening portion of the player body and the lid body to hold and release the peripheral edge portion of the disk in association with the opening / closing operation of the lid body. By providing a pair of such clampers, the disk can be automatically turned over so that both sides of the disk can be continuously reproduced.

[Prior Art] For example, one side of a disk-shaped laser disk (LD) in which video signals and audio signals are recorded by pits on both sides is irradiated with a laser beam from an optical pickup unit to read and reproduce information on one side of the laser disk. There is known a small-sized laser disk player configured to do so. This laser disk player is roughly composed of a player main body in which a disk drive device including a spindle motor, a tar table, etc. is arranged in an opening formed on the upper surface (one side surface), and a lid body which opens and closes the opening of the player main body. It is configured. Then, the lid is opened, the laser disk is placed on the turntable of the disk drive device, and the lid is closed. The laser disk is automatically sandwiched between the clamp rotatably attached to the lid and the spindle of the spindle motor. It is retained for a long time and is rotated at a high speed to be reproduced.

[Problems to be Solved by the Invention] However, as described above, since information is recorded on both sides of the laser disk, a small laser disk player having a conventional configuration continuously reproduces both sides of the laser disk. If the user wants to do so, at the end of the one-sided reproduction of the laser disk, the user opens the lid to take out the laser disk mounted on the disk drive device, flip the laser disk outside, and mount it again on the disk drive device. It was necessary, and usability was bad.

It should be noted that it is composed of a cabinet for storing a plurality of optical discs, a drive device for reading and writing information on the optical discs, and an elevator for taking out the optical discs from the cabinet and automatically inserting the optical discs into the drive device. A large disk recording / reproducing device similar to the Jukebox that can be turned over is known. This is suitable for storing large-capacity data that is not frequently used, because it takes a long time to mount an optical disc or turn it over by using an elevator. Therefore, there is a demand for the development of a small-sized disc player which has a built-in disc reversing mechanism capable of smoothly turning the disc over.

Therefore, the present invention provides a disk player that can automatically and smoothly turn over the disk in a short time and continuously reproduce both sides of the disk.

[Means for Solving the Problems] In the disk player of the present invention, a disk drive device for placing and rotating a disk-shaped disk is arranged in an opening formed on one side surface of the player body, and the opening is provided. A lid that opens and closes is rotatably supported on the player body,
A disc tray is interposed between the opening of the player main body and the lid, the disc tray is rotatably supported by the player main body, and an opening having a diameter larger than that of the disc is formed substantially in the center of the disc tray. And a pair of clampers for holding and releasing the peripheral portion of the disk in association with the opening / closing operation of the lid are provided at opposite positions in the opening of the disk tray so as to be rotatable and movable back and forth. is there.

[Operation] When the reproduction of one side of the disk mounted on the disk drive device of the player main body is completed and the lid is opened, the disk is held by a pair of clampers that interlock with the opening operation of the lid,
It is lifted up a certain angle and inverted. As a result, the disk is turned over and continuously reproduced.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

In the figure, reference numeral 1 is a small laser disk player,
A disc-shaped laser disk A having a color image signal, a stereo 2 channel audio signal and a control signal recorded on both sides by a pit is reproduced. This laser disk player 1 has an opening 3 on the top wall 2a (one side) side.
And a disk drive device 4 is formed in the approximate center of the opening 3.
A player main body 2 in which is arranged, a lid 6 which is rotatably supported on the upper rear ends of both sides of the player main body via a support shaft 5, and which opens and closes the opening 3, and the laser disk A approximately at the center. A circular opening 7 having a diameter larger than that of the laser disk A forming a space for reversing is formed, and is inserted between the opening 3 of the player main body 2 and the lid 6, and the support The disk tray 8 is rotatably supported on the shaft 5.

The player main body 2 is formed into a box shape having an opening 3 on the upper wall 2a side by molding of synthetic resin or the like, and the opening 3 is covered with a blind plate 9. A substantially U-shaped cutout hole 9a is formed from the central portion of the blind plate 9 to the rear wall 2b side of the player main body 2, and a rectangular cutout hole is formed at a diagonal position at a predetermined distance from the central portion. A plurality of (for example, four) 9b are formed. The disk drive device 4 is provided in the front wall 2c side of the player body 2 of the substantially U-shaped cutout hole 9a.
And a laser pick-up 10 is provided inside the rear wall 2b of the player body 2.

The disk drive device 4 includes a spindle motor 11 for rotating the laser disk A at a high speed, a spindle 12 fixed to a rotation shaft 11a of the spindle motor 11, and a spindle 12 protruding from an upper surface of the blind plate 9, and a spindle 12 for the spindle 12. The turntable 13 is integrally provided on the outer peripheral portion on the upper end side and has the laser disk A mounted thereon.

The laser pick-up 10 is composed of an objective lens 14, a laser diode (not shown), etc. and is close to one surface (lower surface) of the laser disk A.
The information is read, and is reciprocally movable directly in the radial direction of the laser disk A by a moving device (not shown) including a rack and a pinion.

A disk mounting member 15 that supports and positions the peripheral edge of the laser disk A is provided in each rectangular notch 9b of the blindfold plate 9 so as to be retractable. That is, an elevating device (not shown) including a cam or the like for moving the disk mounting members 15 up and down in association with opening and closing of the lid 6 is provided below each disk mounting member 15. With this lifting device, the disk mounting member 15 is located above the upper surface of the turntable 13 of the spindle 12 when the laser disk A is mounted, and below the upper surface of the turntable 13 when the laser disk A is reproduced. It is becoming like this.

Also, the rear wall 2b of the player body 2 on both side walls 2d, 2e.
The lid 6 and the disk tray 8 are provided between the upper ends of the sides.
The fulcrum 5 which rotatably supports is pivotally supported. A gear box 17 containing a planetary gear unit 16 is fixed by screws 18 or the like to a bottom wall 2f near the right side wall 2e of the player main body 2 in front of the support shaft 5.

The planetary gear unit 16 includes the left and right side plates 17 of the gear box 17.
A first shaft 19 pivotally supported substantially in the center between a and 17b, and a rotatably supported by the first shaft 19 and having a small diameter on one side surface (side surface on the right side plate 17b side of the gear box 17). A large-diameter reduction gear 20 having a dowel (20a) formed therein and the other end 21a rotatably supported by the first shaft 19.
Is fitted into the engagement hole 20a of the reduction gear 20 and fixed, and the sun gear 21 has a tooth portion 21b formed on the outer periphery on one end side.
And a toothed portion 21b of the sun gear 21 is rotatably supported on a midway portion 21c where the toothed portion 21b is not formed, and a tooth-shaped small-diameter pulley 22a is integrally formed on the outer periphery on the other end side and has a large diameter on one end side. An internal gear 22 having teeth 22b integrally formed on the outer circumference, and a pair of planetary gears 23 rotatably supported by the first shaft 19 and meshing with the sun gear 21 and the internal gear 22 on the other end surface thereof. 23 is rotatably supported and includes a spur gear 24 integrally formed with a tooth portion 24a on the outer periphery of one end having a small diameter.

On the outer surface of the left side plate 17a of the gear box 17, a drive motor 25 that is rotatable in forward and reverse directions is fixed. A small-diameter gear 26 that meshes with the reduction gear 20 of the planetary gear device 16 is fixed to the tip of the rotary shaft 25a of the drive motor 25 that projects to the inner surface of the left side plate 17a. In addition, the gear box
Above the right side plate 17b of 17 is a double gear 28 via a short shaft 27.
Is rotatably supported. Large diameter teeth of this double gear 28
28a is meshed with the small-diameter tooth portion 24a of the spur gear 24 protruding outward from the right side plate 17b, and the small-diameter tooth portion 28b of the double gear 28 is an internal gear portion of the fan-shaped hinge 42 of the lid body 6 described later. It meshes with 45. Further, at a position where the planetary gear device 16 of the support shaft 5 faces, a pulley 29 having an outer periphery formed in a tooth shape is formed.
Is fixed. This pulley 29 and the pulley of the internal gear 22
A belt 30 made of rubber or the like is installed between the belt 22 and 22a.

A clutch plate 32 is rotatably supported on a second shaft 31 pivotally supported at a lower front position between the left and right side plates 17a and 17b of the gear box 17. This clutch board
Reference numeral 32 denotes a first claw portion 3 which is engaged with and disengaged from the outer peripheral tooth portion 22b of the internal gear 22.
2a and a second claw portion 32b engaging and disengaging with the spur gear 24 are formed in a substantially V shape. The second claw portion 32b of the clutch plate 32 is connected to the tip end portion of the piston 35 of the plunger 34 fixed to the bottom wall 2f of the player body 2 via the operation bar 33. A coil spring 3 is provided between the tip of the piston 35 of the plunger 34 and the connecting bar 17c of the gear box 17.
6 is interposed.

Thus, normally, the piston 35 of the plunger 34 is retracted, and the first claw portion 32a of the clutch plate 32 is moved to the internal gear 22.
The internal gear 22 is fixed by being locked to the outer peripheral tooth portion 22b. When the drive motor 25 is rotated in one direction in this state, the rotational force of the drive motor 25 is reduced by the reduction gear 20, the sun gear 21, the pair of planetary gears 23, 23, and the spur gear 24.
Is transmitted to the double gear 28 via. When the laser disk A is turned over, the piston 35 of the plunger 34 is moving forward and the second plate of the clutch plate 32 is moved.
The claw portion 32b is locked to the spur gear 24 so that the spur gear 24 is fixed. In this state, when the drive motor 25 is rotated in one direction, the rotational force of the drive motor 25 causes the reduction gear 20, the sun gear 21, the pair of planetary gears 23, 23, the belt 30, and the pulley 29. It is adapted to be transmitted to the support shaft 5 via the.

The front wall 2c of the player body 2 projects forward and is curved in an arc shape. The front wall 2c includes a power switch 37, a lid opening / closing switch 38, a disc tray opening / closing switch 39, a lid closing / closing switch 40, a play / pause switch, a stop switch, a rewinding switch, a fast-forward switch, and a display unit (not shown). (A part for displaying a clock, a mode, etc.) and the like are provided.

The lid 6 is integrally molded in a planar shape similar to the shape of the player main body 2 by synthetic resin molding or the like, and is suspended from an upper wall 6a and an arcuate front edge portion of the upper wall 6a. It has a front wall 6b and left and right side walls 6c and 6d hanging from both side edges of the upper wall 6a. Lower rear end portions of both side walls 6c, 6d of the lid body 6 are further hung in a semicircular shape and rotatably supported by the player main body 2 via the support shaft 5.

A pair of fan-shaped hinges 41, 42 made of synthetic resin are fixed in parallel with the side walls 6c, 6d at positions near the left and right side walls 6c, 6d at the rear of the lower surface of the upper wall 6a of the lid 6. The support shafts 5 pass through the tip ends of the pair of fan-shaped hinges 41, 42 at an apex angle of about 60 degrees. A cam groove 43 is formed on the bottom side of the inner surface of the left fan-shaped hinge 41. The cam groove 43 includes an arc portion 43a and a straight portion 43b bent from the arc portion 43a toward the support shaft 5. In addition, on the outer peripheral surface of the right fan-shaped hinge 42 on the bottom side, a cam groove 44 is formed from an arc portion 44a and a straight line portion 44b bent from the arc portion 44a to the bottom portion side.
A double gear 28 of the planetary gear device 16 is provided on the bottom side of the inner surface.
The internal gear portion 45 that meshes with the small-diameter tooth portion 28b is integrally formed by projection. Further, at a predetermined position near the player main body 2 on the peripheral surfaces of the pair of fan-shaped hinges 41, 42, screws 46 for mounting a disk tray 8 to be described later are projected and fixed.

Further, a disc clamp 47 is provided at a position corresponding to the spindle 12 of the player main body 2 on the lower surface of the upper wall 6a of the lid body 6.
Is rotatably attached.

The disk tray 8 is formed in a frame shape by molding a synthetic resin, and is entirely housed in a recess 9c formed by the upper surface wall 2a of the plate body 2 and the blindfold plate 9 when the upper surface is closed. It is adapted to be flush with the top wall 2a of the plate body 2. The support shaft 5 penetrates the base end portion 8a of the disk tray 8 to rotatably support the disk tray 8, and both end sides of the base end portion 8a are notched so that the lid 6 is formed. The pair of fan-shaped hinges 41 and 42 are freely inserted.

In addition, an opening 7 having a diameter slightly larger than the outer diameter of the laser disk A is formed substantially in the center of the disk tray 8.
Recesses 48 for accommodating the disk mounting member 15 are formed at positions on the peripheral wall 8b of the opening 7 corresponding to the disk mounting member 15 of the player main body 2, and the circular arc player of the peripheral wall 8b is formed. Recesses 49, 50 and 51, 52 are formed on both sides corresponding to the spindle 12 of the main body 2 and both left and right side walls 8c, 8b of the disk tray 8, respectively. These surrounding walls
Between the recess 49 of the 8b and the recess 51 of the left side wall 8c and the recess of the peripheral wall 8b
A pair of clampers 53, 5 are provided between the 50 and the recess 52 of the right side wall 8d.
4 is arranged so that it can rotate and move back and forth.

As shown in the exploded perspective view of FIG. 5, the clamper 53 located on the left side has a curved V groove 55a formed on the peripheral surface thereof, and a holding portion 55 housed in the recess 49 of the disk tray 8,
The holding portion 55 has a shank portion 56 integrally formed at the center of the bottom surface thereof and penetrated by the recess 49. This shank section
56 comprises a large diameter portion 56a and a small diameter portion 56b. In the small diameter portion 56b of the shank portion 56, a cylindrical bevel gear 57 penetrating the concave portion 51 of the disk tray 8 is loosely inserted. The bevel gear 57 has a pin 58 protruding from the inner peripheral surface thereof, which engages with a long groove 56c formed in the small diameter portion 56b of the shank portion 56, and a screw 59 screwed to the shank portion 56. The compression coil spring 60 interposed between the head and the tip of the bevel gear 57 constantly moves to the large diameter portion 56a side of the shank portion 56.

Further, a ring-shaped cam follower 61 is loosely inserted in the small diameter portion 56b of the shank portion 56 of the clamper 53, and
The long hole 62a of the cam plate 62 is loosely inserted. On one side surface of the cam plate 62 on the holding portion 55 side of the clamper 53, a pair of cam surfaces 62b, 62b that are inclined forward so as to sandwich the elongated hole 62a are formed. The base end of the cam plate 62 has the disk tray 8
A pin is pivotally supported at the tip of a long link 63 which is arranged on the lower surface of the above so as to be movable back and forth. A pair of long holes 63a, 63a are formed in the center of the link 63. This pair of long holes 63a, 6
3a is inserted through a pair of pins 64, 64 protruding from the lower surface of the disk tray 8 and is prevented from coming off by a retaining ring 65.
Further, the cam groove of the fan-shaped hinge 41 is provided at the base end of the link 63.
A pin 66 that fits into 43 is provided. A tension spring 67 is provided between the tip of the link 63 and a predetermined position on the lower surface of the disk tray 8. As a result, when the lid body 6 is opened, the pin 66 of the link 63 pulls the link 63 rearward (in the direction shown by the arrow in FIG. 3) by the straight portion 43b of the cam groove 43 of the fan-shaped hinge 41, and the cam plate 62 of the cam plate 62 moves. When each cam surface 62b pushes up the shank portion 56 of the clamper 53, the clamper 53 moves forward to clamp the peripheral portion of the laser disk A. The most forward stop position of the clamper 53 is set as a reference position of a proper mounting position for clamping the laser disk A on the spindle 12 of the player body 2.

In addition, the bevel gear 57 that rotates together with the clamper 53,
It meshes with a bevel gear 70 provided at the tip of a shaft 69 rotatably supported in a recess 68 formed in the left side wall 8c of the disk tray 8. A gear 72 that meshes with a worm gear 71 fixed to the support shaft 5 of the player main body 2 is fixed to the base end of the shaft 69, and the bevel gear 70 rotates, that is, in the middle of the shaft 69. A disk-shaped operation plate 74 for turning on and off the limit switch 73 for detecting the rotation of the clamper 53 is fixed.

The clamper 54 located on the right side has a V groove 75 curved on the peripheral surface.
A holding part 75 having a formed therein and housed in the recess 50 of the disk tray 8 is integrally formed in the center of the bottom surface of the holding part 75, and is rotatably penetrated into the recess 50 and the recess 52 of the right side wall 8d. And a shank portion 76 attached to the. The shank portion 76 has an annular groove portion 76a in the middle thereof, and a stopper plate 78 fixed to the base end surface thereof with a screw 77 prevents the recess portion 52 of the right side wall 8d from coming off. A compression coil spring 79 is interposed between the holding portion 75 of the clamper 54 and the outer surface of the recess 50.

Further, one end portion 80a of an L-shaped link 80 pivotally supported by a pin on the lower surface of the disk tray 8 is locked in the groove portion 76a of the shank portion 76 of the clamper 54. The other end 80b of the L-shaped link 80 is pin-pivotally supported at the tip of a long link 81 which is arranged on the lower surface of the disk tray 8 so as to be movable back and forth. The center of this link 81 has a pair of long holes.
81a and 81a are formed. The pair of long holes 81a, 81a are formed by a pair of pins 82, 82 protruding from the lower surface of the disk tray 8.
It is inserted through and is retained by a retaining ring 83. Further, a pin 84 that fits into the cam groove 44 of the fan-shaped hinge 42 is provided at the base end of the link 81. As a result, when the lid 6 is opened, the pin 84 of the link 81 pulls the link 81 forward (in the direction shown by the arrow in FIG. 3) by the straight portion 44b of the fan-shaped hinge 42 to push up the shank portion 76 of the clamper 54. As a result, the clamper 54 moves forward against the biasing force of the compression coil spring 79 to clamp the peripheral edge of the laser disk A.

According to the laser disk player 1 of the above embodiment, when the laser disk A is mounted, the power switch 37 is turned on.
When you operate it to turn on the lid opening switch 38, the drive motor
By driving 25, the gear 26 of the drive motor 25 and the predetermined gear and the double gear 28 of the planetary gear device 16 rotate in the directions of the arrows shown by the solid lines in FIG. And the double gear
28 small-diameter gear 28b and internal gear part 45 of fan-shaped hinge 42 of lid 6
The fan-shaped hinge 42 is lifted upward by using the support shaft 5 as a fulcrum. As a result, only the lid 6 is opened to the position of about 30 degrees as shown by the chain double-dashed line in FIG. This time,
Since the left and right links 63 and 81 linked to the cam grooves 43 and 44 of the pair of fan hinges 41 and 42 do not move, the pair of clampers 53,
54 is stopped. In this state, the laser disk A is placed on the turntable 13 of the spindle 12 of the player body 2. Next, the lid closing switch 40 is turned on and the drive motor 25
When the lid 6 is rotated in the reverse direction to close the lid 6, the laser disk A is sandwiched between the spindle 12 and the disk clamp 47 and automatically held. Then, press the playback switch (not shown)
When turned on, the laser disk A is rotated by the spindle motor 11 at high speed to be reproduced.

Next, when the rear surface of the laser disk A is to be continuously reproduced after the single-sided reproduction of the laser disk A, the lid 6 is further opened from the open state of about 30 degrees shown by the chain double-dashed line in FIG. When the drive motor 25 is driven to open it up to about 45 degrees, the left and right links 63, 81 linked to the cam grooves 43, 44 of the pair of fan-shaped hinges 41, 42 respectively move in predetermined directions. As a result, the clampers 53, 54 of the disk tray 8 are
Moves forward to the peripheral side of the laser disk A to securely clamp the laser disk A in a positioned state. When the lid body 6 is further opened after this clamp is completed, the disk tray 8 is placed on the screws 46 and 46 of the pair of fan-shaped hinges 41 and 42, and the disk tray 8 is also opened in conjunction with the lid body 6. As shown by the two-dot chain line in FIGS. 8 and 9,
The lid 6 opens to a position of about 90 degrees and the disk tray 8 opens to a position of about 45 degrees, and both stop.

When the clutch plate 32 of the plunger 34 is switched to engage the second claw portion 32b of the clutch plate 32 with the spur gear 24 of the planetary gear device 16 and drive the drive motor 25, the drive motor 25
Of the gear 26, the predetermined gear of the planetary gear device 16 and the support shaft 5,
Each of them rotates in the direction of the arrow indicated by the one-dot chain line in FIG. As a result, the shaft 69 having the bevel gear 70 of the disk tray 8 rotates in the direction of the arrow shown by the solid line in FIG. 2, and the left clamper 53 rotates 180 degrees. As a result, the laser disk A is automatically reversed. The end of this reversal is detected by the limit switch 73, and then the clutch plate 32 of the plunger 34 is switched to the original locking relationship. Then, the lid closing switch 40 is turned on and the drive motor 25
The disk tray 8 and the lid 6 are rotated by rotating the
When is closed, the laser disk A is positioned and held between the spindle 12 and the disk clamp 47 and is continuously reproduced, as described above.

In this way, the laser disk A is reliably positioned by the pair of clampers 53 and 54 and easily flipped over without user intervention. Further, since the player main body 2, the lid 6 and the disk tray 8 are formed by molding synthetic resin, the weight of the player as a whole can be further reduced.

Although the front wall 2c of the player main body 2 of this embodiment is formed to be curved, it is needless to say that the entire laser disk player 1 may be a rectangular parallelepiped and the object is not limited to the laser disk A player. Of course, other disks may be used.

[Effects of the Invention] As described above, according to the present invention, a disk drive device for placing and rotating a disk such as a disk-shaped laser disk is arranged in the opening formed on one side surface of the player body, and the opening is provided. A lid that opens and closes a portion is rotatably supported on the player body, and a disc tray is interposed between the opening of the player body and the lid, and the disc tray is rotatably attached to the player body. An opening having a diameter larger than that of the disk is formed substantially at the center of the disk tray, and the peripheral edge of the disk is interlocked with the opening / closing operation of the lid at opposite positions in the opening of the disk tray. A pair of clampers for holding and releasing the parts are provided so as to be rotatable and movable back and forth, so that the disc is automatically turned over in synchronism with the opening operation of the lid to continuously reproduce both sides of the disc. be able to.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is an overall perspective view of a laser disk player, FIG. 2 is a perspective view of the drive system, FIG. 3 is a horizontal sectional view thereof, and FIG. FIG. 5 is an exploded perspective view of the gear unit, FIG. 5 is an exploded perspective view of one clamper, FIG. 6 is a perspective view of the laser disk player with the lid opened, and FIGS. 7 and 8 are right side views of the same. FIG. 9 is a vertical sectional view of the left side surface of the same. 1 ... Laser disk player, 2 ... Player body, 2a ... Top wall (one side surface), 3 ... Opening part, 4 ... Disk drive device, 6 ... Lid, 7 ... Opening part, 8 ... … Disc tray, 53 …… Clamper, 54 …… Clamper,
A: Laser disk.

Claims (1)

[Claims] 1. A disc drive device for placing and rotating a disc-shaped disc in an opening formed on one side surface of the player body, and a lid body for opening and closing the opening is rotatable with respect to the player body. A disk tray is interposed between the opening of the player main body and the lid, the disk tray is rotatably supported by the player main body, and the disk tray is provided at the approximate center of the disk tray. A large-diameter opening is formed, and a pair of clampers that hold and release the peripheral edge of the disk are rotated and moved forward and backward at the opposite positions in the opening of the disk tray in conjunction with the opening and closing operation of the lid. A disk player characterized by being freely installed.