JPH0222465B2 - - Google Patents

Description

[Detailed description of the invention] Industrial applications The present invention relates to a rotating recording medium reproducing device.

Prior Art Generally, rotating recording media (video disks and
A device for reproducing a PCM audio disk (hereinafter referred to as a disk) has a structure in which a signal pick-up body is placed on a turntable and moves in the radial direction of the disk rotating at high speed to reproduce the signal of the disk. It is as follows. One type of disc playback device is a playback device in which a jacket (case) in which the disk is housed is inserted into and removed from the device, thereby allowing the disk to be inserted into the device so as to be playable. This playback device has a mechanism that moves the upper position of the turntable in the playback device integrally with the jacket in response to the insertion/removal operation of the jacket and expands the opening of the jacket vertically, and a A disk elevating mechanism that descends, and when the jacket is removed, the expanding mechanism passes the center position of the turntable and then rises to support the center of the disk left in the playback device and support it above the turntable. is provided. Here, the disk elevating mechanism is raised at a speed corresponding to the withdrawal of the jacket. For this reason, when the jacket is pulled out quickly, the disk lifting mechanism moves rapidly and collides with the disk, causing the disk to bounce up and down and the recording surface of the disk hitting a part of the expansion mechanism, causing damage. There was a problem.

Therefore, it is conceivable to solve the above problem by providing a damper in the disk elevating mechanism so that it does not operate at a speed higher than a certain level even when the jacket is quickly pulled out. However, in a configuration where only a damper is provided, if the rise of the disk elevating mechanism is delayed, the recording surface of the disk will be supported by the expanding mechanism before it is supported by the disk elevating mechanism. However, there was a problem in that the recording surface was scratched and scratched.

Means for Solving the Problems The present invention aims to provide a rotating recording medium reproducing device that solves the above problems.
When a case consisting of a jacket containing a rotating recording medium and a lid detachably connected to the jacket and closing an opening of the jacket is inserted into the main body of the rotating recording medium playback device and the jacket is pulled out from the main body of the playback device. a jacket opening expanding mechanism comprising an upper beam member and a lower beam member that extend horizontally between the upper and lower sides of the jacket, moving together with the jacket to vertically expand the opening of the jacket; , a rotating recording medium support elevating mechanism that rises above the center of the turntable while the jacket is being pulled out of the playback device main body and supports the rotating recording medium near the center hole left in the playback device main body; In the rotating recording medium reproducing apparatus, the rotating recording medium supporting and lowering mechanism is provided with a damper means for limiting the speed of the rising operation, and
If the lifting operation of the support elevating mechanism is delayed due to a quick jacket withdrawal operation, the outer groove guard support part that receives and supports the outer circumferential groove guard of the rotating recording medium left inside the main body of the playback apparatus is removed. This is provided on the lower beam member of the jacket opening expanding mechanism.

Embodiment Next, an embodiment of the rotary recording medium reproducing apparatus according to the present invention will be described.

First, with reference to FIG. 1, the disc playback device will be schematically explained.

The disk playback device 1 includes a disk 3 housed in a disk case 2 shown exploded in FIG.
Play.

The disk case 2 consists of a jacket 4 and a lid plate 5. A disk 3 is housed in a flat space of a jacket 4. The lid plate 5 consists of a main body 7, a collar 8 at the front end of the main body 7, and engaging arms 9 on the left and right sides. This lid plate 5 is connected to the jacket 4 by a protrusion 10 of an engaging arm 9 engaging a recess 11 in a side wall of the jacket, and a collar 8 closing an opening 12 of the jacket 4.

The disk playback device 1 includes a jacket opening mechanism (opener) 21 that expands the opening of an inserted jacket, a turntable 22 on which the disk 3 is placed and rotates it, a disk clamp mechanism 23 that clamps the disk 3, and a disk. Lid plate locking and holding mechanisms 24, 24A that lock and hold the lid plate 5 during installation and release the lock and hold of the lid plate 5 when recovering the disk, and the coupling of the lid plate 5 to the jacket 4 when the disk case 2 is inserted deep into the disk case. Lid plate coupling release mechanisms 25, 25A for releasing the disks, a disk lifting mechanism 26 for lifting and lowering the disk 3 on the turntable 22, and a signal pickup body transfer mechanism for moving the signal pickup body 27 in the disk radial direction (arrows Y ₁ and Y ₂ directions). 28, a control mechanism section 29 for switching and operating the disk elevating mechanism 26 and the pick-up body transfer mechanism 28, etc.

The jacket expansion mechanism 21 has upper and lower beams 40 and 41 that are horizontally suspended above and below the inserted disk case (jacket 4), and the left and right ends are guided by guide rails 42 and 43. Then, the upper position of the turntable 22 is moved in the directions of arrows X ₁ and X ₂ . The signal pickup body 27 is mounted on a carrier 44 that is movable in the directions of arrows Y ₁ and Y ₂ . The disk clamp mechanism 23 is connected to the device 1
A pair of upper and lower clamp fingers 4
It has 5,46.

To play a disc, insert the disc case 2 into the device 1 by operating a standby button (not shown).

By operating the standby button, the control mechanism section 29 is activated, the disk lifting mechanism 26 is activated, the disk support structure 47 is raised, and the disk clamp mechanism 23 is placed in a disk clamp standby state.

When the disk case 2 is inserted into the device ₁ in the direction of arrow
The opening 12 is expanded vertically by the expansion mechanism 21 and inserted. Disk case 2 is device 1
As a first result, the disk clamp mechanism 23 operates and its clamp fingers 45 and 46 close to the groove guard 3a of the disk 3.
to clamp. As a second result, the lid plate locking and holding mechanisms 24, 24A are operated, and the locking fingers 48, 48A are rotated in a direction to relatively enter the L-shaped notch 13 of the lid plate 5 and lock it. move. As a result, the lid plate 5 is locked to the locking fingers 48, 48A, and the support fingers 49, 48A are locked.
49A and is locked and held in the inner part of the device 1. Furthermore, as a third result, the lid plate 5 is uncoupled from the jacket 4 by the lid plate coupling release mechanisms 25, 25A.

Next, when the disk case 2 is pulled out in the direction of arrow _X2 , the lid plate 5 and the disk 3 remain in the device 1, and only the jacket 4 is pulled out.
The disk 3 is clamped by the clamp mechanism 23 at the groove guard 3a at the back of the device, and the center hole 3
The disk support structure 4 in the raised position around b
7 and is horizontally supported directly above the turntable 22.

When the jacket 4 is pulled out of the apparatus, the disk clamp mechanism 23 becomes unclamped, the disk support structure 47 descends, the disk 3 is placed on the turntable 22, and the center hole 3b is clamped by the clamp claw mechanism 50. is clamped and mounted on the turntable 22. In this state, a turntable motor (not shown) is started, and the disk 3 rotates in the direction of arrow A together with the turntable 22.

Also, the carrier 44 moves in the direction of arrow _Y1 ,
The signal pickup body 27 scans the recording surface of the disk 3 relatively, and the information signal is reproduced.

Next, to explain the operation and operation of removing the disk 3 from the playback device 1 and recovering it in the disk case 2, as the playback operation is completed, the carrier 44 (signal pick-up body 27) moves in the direction of arrow Y ₂ . Then, the disk support structure 47 rises and the disk 3 is pushed up, and the pushed up disk 3 is clamped by the clamp mechanism 23.

When recovering the disc, the empty jacket 4 is reinserted into the playback device 1 with the opening at the tip.
The expansion mechanism 21 is pushed by the jacket 4 and moves in the direction of arrow _X1 again, opening the opening 12 of the jacket 4.
expand. As the jacket 4 is inserted in the direction of arrow _X1 , the disk 3 is inserted into the jacket 4 relative to the opening 12. When the jacket 4 is pushed to the final position, the disk 3 is housed in the jacket 4, and the lid plate 5 closes the opening of the jacket 4 and enters the jacket 4. Further, the lid plate 5 is separated from the lid plate coupling release mechanisms 25 and 25A, and the lid plate 5 is coupled to the jacket 4. Therefore, jacket 4
By pulling out the lid plate 5 in the direction of arrow X ₂ , the lid plate ₅ remains connected to the jacket 4.
The disc 3 is removed from the playback device 1 and collected into the disc case 2.

Next, the main parts of the present invention will be explained with reference to FIGS. 3 to 5.

3 and 4 respectively show the disk lifting mechanism 2.
6 is a plan view and a front view showing the jacket expanding mechanism 21 taken out, and FIG. 5 is a side view showing a state in which the jacket expanding mechanism 21 supports the disk 3.

The disk lifting mechanism 26 is a motor (not shown).
a control arm 62 that is guided by a cam groove 60a and rotates around a shaft 61 when the gear 60 rotates, and a torsion coil spring 63.
A lifting arm 64 is provided coaxially with the control arm 62 via the
2), a lifter arm 66 which has a Y-shape in plan view and an L-shape in front view and is supported on a horizontal shaft 65; A disk support structure 47 that moves up and down, an elevating arm 64, and a lifter arm 66.
It consists of a link 67 etc. that connects the The disk support structure 47 moves up and down in accordance with the rotation of the elevating arm 64, as will be described later. Reference numeral 68 denotes an air damper which is a main part of the present invention, and has a well-known structure consisting of a cylinder member 68a fixed to the chassis and a piston member 68b fitted into the cylinder member 68a and connected to the lifting arm 64. The strength of the damper is adjusted by adjusting the screwing amount of the screw 68c that controls the size of the air passage. This air damper 68 functions to limit the rising speed of the disk lifting mechanism 26 to a predetermined speed or less.

Also, the upper and lower beams 4 of the jacket expansion mechanism 21
0 and 41 are shafts 40a and 41 on the case insertion port side, respectively.
a is supported by sliders 70 and 71 that are slidably fitted to each guide rail 42 and 43,
It is horizontally suspended between sliders 70 and 71. The upper and lower beams 40, 41 have expansion claws 40b, 40c, 41b, 41 that lock the tip of the jacket 4.
c. Engagement pins 40d and 41d that engage with the small holes 14 of the jacket 4 are provided. Also, the lower beam 41
Groove guard support pieces 72 and 73, which are essential parts of the present invention, are fixed to the groove guard support pieces 72 and 73, which are essential parts of the present invention. This support piece 72, 7
Reference numeral 3 designates a bent member having a length l, and in plan view, as shown in FIG. 3, the jacket expansion mechanism 2
The outer periphery of the disk 3 left in the playback device 1 in the section indicated by L in the movement path of the disk 1 (the section from the position after passing through the center of the turntable 22 during the removal operation to the position before coming off from the disk 3) They are arranged symmetrically so as to face the lower side of the groove guard 3a. In addition, the support pieces 72 and 73 are, in particular, before the recording surface 3c of the disk 3 is lowered to the position where it comes into contact with the expansion claws 41b and 41c and the engagement pin 41d, as shown in FIG. In other words, a gap g exists between the recording surface 3c, the expansion claws 41b and 41c, and the engagement pin 41d in FIG.

Next, a description will be given of the operation of the above-described structural mechanism when the jacket is pulled out as part of the disk mounting operation.

When the standby button is operated when the disk case is inserted, the disk lifting mechanism 26 is activated by the motor.
moves upward, and the mechanism 26 enters the state shown in FIG. 3 and the state shown by the two-dot chain line in FIG.

When inserting disk case 2 in the direction of arrow _X1 ,
The upper beam 40 rotates in the direction of arrow B, the lower beam 41 rotates in the direction of arrow C, and the expansion claws 40b, 40c, 41
b and 41c lock the front end of the jacket 4 and expand this opening vertically. Further, the small holes 14 of the jacket 4 engage with the engagement pins 40d and 41d, and the jacket 4 and the expansion mechanism 21 are connected, and the expansion mechanism 21 follows the insertion and removal operation of the jacket 4 and moves in the direction of the arrow.
Move in the X ₁ and X ₂ directions. The opening of the jacket 4 is secured to the left and right ends by expansion limiting protrusions 40e, 41e, and 40f, 41f, which are symmetrically provided on the upper and lower beams 40, 41, as shown by two-dot chain lines in FIG. Nearby areas are expanded with expansion restricted. This is to limit the bounce of the disk 1.

When the disk case 2 is inserted, the lifting arm 6
4 is the cam surface 6 by the hanging shaft 70a of the slider 70.
4a is pushed and rotated clockwise against the spring 63 to be locked, and the lifter arm 66 rotates in the direction of arrow _D1 , and the support structure 47 descends and retreats from the movement path of the expansion mechanism 21. do.

After the disk case 2 is inserted deep into the playback device 1, the disk 3 is clamped and left inside the device, and only the jacket 4 is pulled out in the direction of arrow _X2 . When the jacket 4 is removed at a normal speed, the lifting arm 64 is unlocked after the expanding mechanism 21 passes above the support structure 47, and the arm 64 moves the cam surface 64a in the direction of the arrow.
It is rotated counterclockwise by the spring 63 while being guided by the hanging shaft 70a that moves in the _X2 direction. The rotation of the lifting arm 64 causes the lifter arm 66 to rotate in the direction of arrow _D2 via the link 67, and the support structure 47 rises. The disk 3 is clamped at the inner part and supported near the center hole by a support structure 47, and is supported apart from the upper and lower beams 40 and 41 as shown by the two-dot chain line in FIG.

If the jacket pulling operation described above is performed quickly, the hanging shaft 70a will quickly separate from the cam surface 64a, and when the lifting arm 64 is unlocked, it will forcefully try to rotate counterclockwise due to the spring force of the spring 63. . However, due to the action of the air damper 68, the rotational speed of the lifting arm 64 is limited, and the lifting arm 64 does not correspond to the jacket removal speed, and is slower than this, that is, when the jacket is removed at a normal speed. rotate at the same speed. The support structure 47 also rises at the same speed as in a normal jacket removal operation. Therefore, even when the jacket 4 is pulled out quickly, the support structure 47 does not collide with the disk 3 forcefully, but only with a small impact, and this collision causes the disk 3 to become unsupported. No bouncing or warping occurs on the structure.

On the other hand, when looking at the height position of the support structure 47 as a reference, the expansion mechanism 21 has moved in the direction of arrow _X2 compared to the case of normal operation.
When looking at position 1 as a reference, the timing of the rise of the support structure 47 will be delayed. Furthermore, when the expansion mechanism 21 moves in the direction of arrow _X2 , that is, when the disk 3 is relatively removed from the jacket 4, the disk 3, which is clamped at the back, tilts in the direction in which the case insertion opening side descends. If the timing of disk support by the support structure 47 is delayed, the lower recording surface 3c of the disk 3
will come into contact with a part of the lower beam 41 and be scratched.

However, in this embodiment, while the expansion mechanism 21 is moving within the section L, even if the disk 4 is tilted forward, the support pieces 72 and 73 are not moved as shown in FIGS. 4 and 5. Outer groove groove guard 3
Support a by holding it in two places on the left and right. That is, the recording surface 3c of the disk 4 is expanded by the expansion claws 41b, 41c,
It is supported in a state apart from the engagement pin 41d, thereby preventing the recording surface 3c from being scratched and damaged. While the expansion mechanism 21 is moving within the section L, the support structure 47
is raised to the final position, and the disk 4 is gently supported as shown by the chain double-dashed line in FIG. 5, as in the case of a normal jacket removal operation.

Effects As described above, according to the rotating recording medium playback device of the present invention, even when the jacket is pulled out at an extremely high speed, the support elevating mechanism collides with the rotating recording medium with force, and the rotating recording medium is It is possible to reliably prevent an accident in which the jacket bounces and warps, and it is also possible to prevent an accident in which the recording surface of the rotating recording medium is scratched by a part of the expansion mechanism, that is, when the jacket is pulled out at a normal speed. Similarly, it has the advantage that the rotating recording medium can be left and supported within the reproducing apparatus in a sufficiently protected state.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the rotary recording medium playback device according to the present invention before a disk is mounted, with the top cover removed. FIG. 2 is a plan view of a disk case used in the playback device of FIG. FIGS. 3 and 4 are an exploded perspective view of the example, a plan view and a front view showing the disk elevating mechanism and the jacket expanding mechanism, which are the main parts of the present invention, respectively, and FIG. 5 is a high-speed jacket removal mechanism. FIG. 3 is a side view showing a state in which the outer circumferential groove guard of the disk is supported by a support piece. 1... Disc playback device, 2... Disc case,
3...Disc, 3a...Outer groove guard, 3c
...recording surface, 4...jacket, 5...lid plate, 21...jacket expansion mechanism, 22...turntable, 23...disc clamp mechanism, 24,2
4A... Lid plate locking and holding mechanism, 25, 25
A...Lid plate coupling release mechanism, 26...Disk elevating mechanism, 27...Signal pick-up body, 28...
Signal pickup body transfer mechanism, 29...control mechanism section, 40, 41...beam, 40a, 41a...axis,
40b, 40c, 41b, 41c...expansion claw, 40
d, 41d...Engagement pin, 40e, 40f, 41
e, 41f... Expansion limiting protrusion, 42, 43... Guide rail, 62... Control arm, 63... Torsion coil spring, 64... Lifting arm, 66... Lifter arm, 6
7... Link, 68... Air damper, 68a... Cylinder member, 68b... Piston member, 68c... Screw,
70, 71...Slider, 70a...Drooping axis, 72,
73...Groove guard support piece.

Claims (1)

[Claims] 1. Insert a case consisting of a jacket containing a rotating recording medium and a lid removably connected to the jacket and closing the opening of the jacket into the main body of the rotating recording medium playback device, and pull out the jacket from the main body of the playback device. A jacket opening expanding mechanism comprising an upper beam member and a lower beam member that extend horizontally between the upper and lower sides of the jacket, moving together with the jacket to vertically expand the opening of the jacket. and a rotating recording medium support lift that rises above the center of the turntable and supports the vicinity of the center hole of the rotating recording medium left inside the playback device main body while the jacket is being pulled out of the playback device main body. In the rotating recording medium reproducing device having a mechanism, the rotating recording medium support elevating mechanism is provided with a damper means for limiting the speed of the ascending operation, and the jacket pulling operation is performed quickly and the ascending operation of the supporting elevating mechanism is delayed. In this case, the lower beam member of the jacket opening expanding mechanism is provided with an outer circumferential groove guard support portion for receiving and supporting the outer circumferential groove guard of the rotating recording medium left in the main body of the reproducing apparatus. A rotating recording medium playback device.