JPH0233318Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a rotary recording medium storage jacket push-back mechanism of a rotary 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 pickup 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. be. One type of disc playback device is a playback device that allows a disc to be loaded into the device for playback by inserting and removing a case containing the disk from the device. This playback device is provided with a mechanism that automatically pushes a portion of the jacket back out of the device using a spring force to facilitate the jacket removal operation when the insertion operation of the disk case is released.

The conventional jacket push-back mechanism has a structure in which coil springs are installed in the left and right guide rails along which the slider supporting the left and right sides of the case moves, respectively, and has a large number of parts. The structure was complicated, and there were drawbacks in terms of cost and ease of assembly.

Means for Solving the Problems The present invention aims to provide a rotating recording medium storage jacket push-back mechanism for a rotating recording medium reproducing device that solves the above-mentioned problems. When a case consisting of a jacket housing the rotating recording medium and a lid detachably connected to the jacket and closing the front opening of the jacket is inserted deep into the playback device, the jacket is inserted into the playback device. In a mechanism that pushes a part of the jacket back out of the playback device, a jacket push-back member that is pushed when the case is inserted and moves against a spring, and pushes back a part of the jacket after the case insertion operation is released, is placed near the upper center in the left-right direction of the case insertion path. The jacket push-back member applies the push-back force to the left and right direction of the expansion mechanism that moves while being guided by the left and right guide rails to expand the front opening of the jacket when the case is inserted. The structure is such that it acts on a central location.

Embodiment Next, an embodiment of the rotary recording medium storage case push-back mechanism 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 when it is installed and release the lid plate 5 when the disk is retrieved, 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 signal pick-up body transfer mechanism 28, and a jacket push-back mechanism 60, which is the essential part of the present invention.

The jacket expansion mechanism 21 has upper and lower beams 40 and 41, and the left and right ends are connected to the guide rail 4.
2 and 43, the position above 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 provided deep inside the device 1,
It has a pair of upper and lower clamp fingers 45 and 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. Further, as will be described later, the jacket 4 is partially pushed back.

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, we will 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) is moved in the direction of arrow _Y2 . The disk supporting structure 47 is raised to push up the disk 3, 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 7.

The jacket push-back mechanism 60 generally consists of a single push-back member 61, a coil spring 62, and the like.

In particular, the push-back member 61, as shown in FIG.
A slide plate 63 that has a roughly “7” shape and supports the lid plate locking and holding mechanisms 24 and 24A.
Then, fit into this narrow guide notch 63a and
It is installed so that it can move in the X ₁ and X ₂ directions. The push-back member 61 is disposed near the center line C of the insertion path of the disk case 2 in the left-right direction. Further, the push-back member 61 is biased in the direction of arrow _X2 by a coil spring 62, and as described later,
The position in the same direction is regulated by a slide plate 63. Further, the slide plate 63 has a seventh position as described below.
It is moved to the position shown in the figure and locked, and functions as a stopper whose position changes with respect to the push-back member 61.

Further, the push-back member 61 is located directly below the support finger 49A, and the tip portion 61a is at a height opposite to the lower beam 41 of the opener 21 to be inserted.

Before inserting the disk case, the slide plate 63 is in a position where it is pulled by the coil spring 64 and moved in the direction of arrow _X2 as shown in FIGS. 1 and 3.
The push-back member 61 is also at a position moved in the direction of arrow _X2 .

When the disk case 2 is inserted into the reproduction apparatus 1, the jacket 4 is inserted with the opening 12 expanded by the upper and lower beams 40 and 41, as shown in FIG. When the disk case 2 is inserted to the vicinity of the deep part of the playback device 1, the lower beam 41 first comes into contact with the tip 61a of the push-back member 61, and only the push-back member 61 resists the coil spring 62 and moves in the direction of the arrow _X1. Move by being pushed in a direction. Next, the flange 8 of the lid 5 is bent on the slide plate 63 to form left and right contact arms 63.
b, the slide plate 63 is pushed and moves in the direction of arrow X1 against the coil spring ₆₄ , guided by guide rollers 65a to 65c on the chassis 66. At this time, the push-back member 61 maintains a constant relative positional relationship with the slide plate 63 while moving the lower beam 41.
Pressed by arrow X to move in _one direction. FIG. 5 shows the state at this time.

When the disk case is inserted to the final position,
The slide plate 63 is connected to the lock plate 6 as shown in FIG.
7, and the lid 5 is locked by the lid plate locking and holding mechanisms 24, 24A. Further, the push-back member 61 is a coil spring 62 extended to a length _l2 .
The notch 63a of the slide plate 63 is biased in the direction of the arrow _X2 by the spring force (pushback force) and locked.
It is in a state where it can be moved to a position where it is locked by the inner part of. Therefore, when the disk case insertion operation is released, the opener 21 is pushed back by the push-back member 61 against the lower beam 41 a distance L in the direction of arrow _X2 , as shown in FIGS. 6 and 7. The jacket 4 is pushed back a distance L while being locked to the opener 21, and its rear end protrudes outside the playback device to a size that allows the operator to securely grasp it.

The jacket 4 is pulled out in the direction of arrow _X2 by the operator while firmly grasping the rear end portion protruding outside the reproduction apparatus.

Here, the push-back force F acts on one location of the opener 21, but since the location of its action is a location P of the lower beam 41 near the disk case insertion center line C, the opener 21 , it is pushed back smoothly in the direction of arrow _X2 without being twisted in the plan view, as in the case where pushing back force is applied to both left and right ends.

Note that the slide plate 63 is unlocked when the disk is recovered, and moves along the arrow X ₂ together with the push-back member 61.
Slide back in the direction.

Next, the expansion and contraction operation of the coil spring 62 will be explained. The coil spring 62 initially has a length l,
When pressed by the opener 21, as shown in FIG.
The jacket is extended to l ₁ , and in the process of further contracting from this state, the jacket is pushed back, and finally reaches l ₂ as shown in FIG. Here, in the initial state, the push-back member 61 moves in the direction of the arrow as shown in FIGS. 1 and 3.
Since it is locked to the slide plate 63 which has moved in the _X2 direction, its tip 61a is located closer to the disk case insertion opening than the push-back piece in the conventional mechanism. Therefore, the extended dimension (l ₂ -l) of the coil spring 62 is greater than the compressed or extended dimension of the spring in conventional mechanisms. That is, in this embodiment, the coil spring 62 is expanded by a long dimension (l ₂ -l) to gradually increase the spring force for pushing back the jacket, so that the degree of expansion is gradual. Note that the biased spring force acts as a drag force that prevents the insertion of the disk case, but because the strength of the bias is gradual, the disk case operation becomes gradually heavier, and unlike the conventional case, it suddenly becomes difficult to insert the disk case. It does not feel heavy and has a good operating feel.

Effects As described above, according to the rotary recording medium storage jacket push-back mechanism of the rotary recording medium playback device according to the present invention, the push-back member applies a push-back force to the approximately upper center in the left-right direction of the jacket opening expanding mechanism. Because of this structure, the jacket can be pushed back with a single push-back member with the same smoothness as when pushing both the left and right ends of the jacket opening expansion mechanism, which simplifies the structure and It has features such as facilitating assembly work.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the rotating recording medium storage jacket push-back mechanism according to the present invention together with a disc playback device in which the mechanism is incorporated, and FIG. FIG. 3 is an exploded perspective view of an example of a disk case.
Figures 4, 5, and 6 are side views showing step-by-step the operation of the jacket push-back mechanism from before case insertion to completion of jacket push-back, respectively, and Figure 7 is a side view of the case push-back mechanism shown in Figure 6. FIG. 3 is a plan view of the state shown in FIG. 1... Disc playback device, 2... Disc case, 3... Disc, 4... Jacket, 5...
lid plate, 21...jacket expansion mechanism,
22... Turntable, 23... Disc clamp mechanism, 24, 24A... Lid plate locking and holding mechanism, 25, 25A... Lid plate coupling release mechanism, 26... Disc lifting mechanism, 27...
Signal pick-up body, 28... Signal pick-up body transfer mechanism, 29... Control mechanism section, 47... Disk support structure, 60... Jacket push-back mechanism, 61... Push-back member, 61a... Tip portion, 6
2, 64...Coil spring, 63...Slide plate,
63a...Narrow guide notch, 63b...Abutment arm,
65a to 65c...Guide roller, 66...Chassis, 67...Lock plate.

Claims (1)

[Scope of utility model registration request] In order to load the rotating recording medium into the playback device, a case consisting of a jacket housing the rotating recording medium and a lid detachably coupled to the jacket and closing the front opening of the jacket is inserted deep into the playback device. In a mechanism for partially pushing the jacket back out of the playback device, a jacket push-back member that is pushed when the case is inserted and moves against a spring, and partially pushes back the jacket after the case insertion operation is released, is inserted into the case insertion path. The jacket push-back member is disposed near the upper center in the left-right direction of the jacket, and the jacket push-back member applies the push-back force to an expansion mechanism that moves while being guided by the left and right guide rails to expand the front opening of the jacket. A rotary recording medium storage jacket push-back mechanism of a rotary recording medium reproducing apparatus configured to act on a substantially central position in the left-right direction of the mechanism.