JPS58224464A - Reproducing device of information disc - Google Patents

Abstract

PURPOSE:To load/unload a disc precisely even in inexperienced operation by providing the titled device with a means to rotate one catching at least out of the upper and lower catching members of a catching means and a means to suppress the rotation of the catching members. CONSTITUTION:An upper disc catcher 120 and a lower disc catcher 121 are pivotally supported by a saft 123 supported by a catcher subframe 122 and the catcher 121 is limited at its revolution by a pin 134. Since the catcher 120 is excited in the counterclockwise direction by a plate spring 135, the catcher 120 is rotated when a stroke is applied and a cover 3 and a group guard 136 of a disc 1 can be smoothly inserted. In addition, the rotation of a lock lever 119 almost removes the stroke, so that the pawl part 137 of the catcher 120 and that 138 of the catcher 121 can catch the group guard 136 of the disc 1 precisely.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an information disc playback device, and in particular, to a device (hereinafter referred to as a playback device) that plays back information from an information disc (hereinafter referred to as a disc) such as a video disc, etc. The present invention relates to mechanical means that can easily perform detachment.

That is, in the present invention, after inserting a case with a disc stored therein into the playback device from the front of the playback device, the case is pulled out and the disc is left inside the playback device.
The present invention also relates to an information disc reproducing apparatus in which the disc is stored in the case and taken out of the reproducing apparatus by inserting an empty case into the reproducing apparatus and then removing the case.

Various systems have been proposed in which information signals are recorded on a disk at an extremely high density compared to audio disks such as records, and from which information such as television video information is reproduced. When the high-density recording disk used in such a system is set in a playback device, it is basically the same as an audio record that has been widely used in the past. However, since the system itself is new, handling the disks becomes a problem. Some types of discs are particularly unpleasant to touch.

However, it is still important to make it possible for people of all ages and genders to simply and easily set a disc on a playback device in order to popularize the system itself.

For ease of handling and operation, the disc is housed in a case, and the user can handle the disc without directly touching the disc.

It is desirable to configure the device so that it can be attached to and attached to the playback device. FIG. 1 is a partially cutaway perspective view of a previously proposed disk pack that was devised in response to such demands.

As shown in the figure, a disc 1 is housed in a bag-like case 2 made of plastic or the like, and the opening of the case 2 is closed by a lid 3. When this case 2 is inserted into a playback device, it is played. The hook part 4 of the lid 3 and the notch part 5 of the case 2 are disengaged within the apparatus, and the disc 1 is configured to be taken out of the case only within the playback apparatus. Never touch disc 1 directly.

In a playback device that plays back a disc stored in such a case, a mechanism is developed to take out only the disc from the case inserted into the device and place it on the turntable. Attempting to construct a perfect mechanism is extremely inconvenient, as it complicates the mechanism and increases costs.

SUMMARY OF THE INVENTION Accordingly, the main object of the present invention is to provide an information disc reproducing apparatus that is equipped with a mechanism that can reliably load and unload a disc even with inexperienced or rough operations.

Another purpose is to reduce the cost of the device by simplifying the mechanism for loading and unloading the disk.

To summarize the invention, a case for storing an information disc is inserted into a playback device, and the information disc is taken out from the case within the playback device.

In the information disc playback device, the mechanism for storing the information disc in the case includes a clamping means for clamping the information disc,
means for rotating at least one of the upper and lower clamping members of the clamping means to release the engagement with the information disc; and rotation of the one clamping member to prevent the information disc from coming off during a predetermined operation. The information disk reproducing apparatus is characterized in that it is equipped with means for preventing movement.

Preferably, the means for preventing the rotation of the holding part is provided by a mechanism for expanding the case opening through which the information disc enters and exits, or by a support part 4, 1 that supports the information disc in the center. until it begins to descend towards the turntable.
It is interlocked with the operation of the case opening expansion mechanism.

More preferably, the case is provided with a lid that closes the case opening, and the first means is driven by the lid when the case with a lid is inserted and pushes the lid into the case when the case is removed. The device further includes a second means that elastically contacts the lid and promptly pushes the lid into the case using the elastic energy accumulated during the insertion when the case is removed.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

FIG. 2 is an external view of the regeneration device M20 as an example. For this reproducing apparatus 20, the case 2 shown in FIG. 1, in which the disk 1 is housed and closed with a lid 3, is used, and the explanation will be given in the following order.

(2) The disc loading case 2 is manually inserted 17 into the playback device 20 from the front, and the disc 1 is placed on the turntable 2.

The operations linked to the insertion operation include: - Expanding the case opening - Driving the center gap (lowering) - Clamping the lid and disk (a) Releasing the connection between the case and the lid (b) Clamping the lid e\) Disk In conjunction with the action of pulling out the clamping case, ■Drives (raises) the center cap.In response to the operation of the playback button, ■Places the disc on the turntable.(a) Disengages the lower disc catcher.-) Lower disc catcher. Rotation e → The disc lowers as the center cap descends ■, play/play stops The signal pickup device accesses the disc to reproduce information (performance or play), and this operation is stopped to recover the disc. make it possible.

Depending on the operation of the play button, ■ Depending on the operation of the play stop button, ■ Stop playing (a) Holding the disc with the center cap, holding the disc with the lower disc catcher, collecting the disc in the empty case. 2 into the playback device 20, and then insert disc 1 into the playback device 20.
This is the operation of storing the data inside the playback device and taking it out of the playback device.

■ Expanding the opening of the case ■ Driving (lowering) the center cap [Phase] Storing the disc ■ Removing the case Now, in the playback device 20 shown in Fig. 2, 21 inserts the case 2 in order to load and retrieve the disc. insertion port, 2
Reference numeral 2 indicates a window for displaying the performance time, and reference numeral 23 indicates a plurality of operation buttons to be operated to perform playback, stop, and other operations, both of which are arranged on the front of the playback device 20.

24 is a lid for replacing the regenerated needle. Note that this reproducing device is of a type that picks up information signals by bringing a reproducing needle into contact with the disc.

The disc case 2 is inserted along the arrow entry direction, but at this time, the claws 25 - 925R and the claws 2 provided on the pair of upper and lower opening levers (upper opening bar 32 and lower opening lever 33)
6 I-, 26R enter the respective inner parts 7 of the case 2 through cutouts 6 formed in the lid 3 of the case 2.

From this state, when the case 2 is pushed in, the upper opening bar 32
．． The lower opening donkey 33 moves to the back, and the opening donkeys 32, 33
As will be described later, the claws 25 I-, 25R and the claws 261-, 26 R- rotate in a direction that opens each other at a certain fulcrum.
The opening of the case 2 is pushed and expanded. At this time, holes 8 and 8' (hole 8
1 is not clearly shown in FIG.
(located on the lower side of
, 27d. As a result, the case 2 and the upper and lower opening levers 32 and 33 are assembled, and the case 2 is introduced into the playback device 20.

FIG. 3A is a plan view of the internal mechanism of the playback device 20 of FIG. 2, with the upper and lower cabinets removed and the turntable (described later), needle case, etc. omitted;
Figure 3B is a right side view of a part of the disc catcher, Figure 3C
The figure shows a right side view of the sleeve slider.

Now, I will explain the means and operations for opening case 2 one by one, but there is a small session in which similar operations are performed on the left and right sides of the opening lever (or on the left and right with respect to the insertion direction A), and the opening of case C is also carried out in this manner. (as applicable), in the following only one side will be described and the other side will be briefly mentioned or omitted. In the detailed description, the symbol k will be used to indicate the right (or right side), and the symbol L will be used to indicate the left (or left side).

■ Enlargement of Case Opening The side surface of the case insertion opening of the rail 28 fixed to the rail base 27 shown in FIG. 3A is illustrated in FIG. 4A, showing only the necessary parts. In FIG. 4A, support members 328 and 338 are fixed to the upper and lower donkeys 32 and 33, respectively, and a shaft 30.3 is fixed to the support member 32H.
4 is crimped, and the support member 335 has a shirt) 31.3
5 is caulked. The shafts 30, 31 are each engaged with a sleeve slider 29, while the shaft 3
4.35 are rotatably engaged with rollers 36,37, respectively. Furthermore, spring hooks are attached to portions 38. I is formed, and a tension spring 40 is mounted on this spring hook at part 38,39. In this state, the claws 25 of the upper and Shimonoseki donkeys 32 and 33
．． 26 are closed to each other and, as previously mentioned, the claws 25.2
6 fits into the case 2 (particularly the notch 6). When the case 2 is pushed in the direction of arrow A, the K-sleeve slider 29 (of course, the L-sleeve slider is also pushed out at the same time). At this time, the rollers 36 and 37 that were in the recess 28u of the k-rail 28 are moved to the tapered part 4 of the k-rail 28.
It ran aground on 11,41t. As a result, the upper and Shimonoseki donkeys 32 and 33 are lifted and opened, so the fourth
As shown in Figure B, the claws 25 and 26 pull up the tip of the case in the vertical direction. The combustible case 2 is bent and opened as shown in FIG. 4B.

As shown in Fig. 2, the claws 25, 26 are provided on the left and right (claws 26R, 26I-, 25R, 25L),
The opening of the case 2 is the largest at its center, since the case 2 is forced to expand at certain points, and since both sides 10 and 10 of the case 20 form fixed walls formed integrally. Here, the hole 8.8' of the case 2 is on the upper side, and the Shimonoseki donkey 32
, 33, respectively.

Note that the same operation as described above is performed on the left side, that is, on the L sleeve slider 46 that slides on the F and L rails 45. Still, in FIG. 3A, F-
Although the L rail 45 is shown cut in the middle, this is to clearly show the members located below it, and as will be described later, it is connected in the same manner as the rail 28 described above.

■ Driving the center cap (lowering) Since the center cap 48 is in the raised position when inserting the disc-containing case 2, if it remains as it is, the Shimonoseki robot will
Contact with 33. Therefore, it is necessary to hold it down for the necessary period.

The center cap 48 descends based on the movement of the sleeve slider 29. As shown in FIG. 3C, the k-sleeve slider 29 includes a shaft 49 embedded downward in a part thereof, and a roller 50 and a positioning roller 51 are each rotatably supported on the shaft 49. Therefore, when the sleeve slider 29 shifts from the state shown in FIG. 3, the roller 50 comes into contact with the tapered portion 54 of the first disk lowering lever 53. Upon contact, the first disk lowering lever 53 rotates counterclockwise around a shaft 55 fixed to the chassis 52. At this time, the roller 50 is pushed by the reaction of the contact and escapes, so the positioning roller 51 is moved to the R rail base 2.
By coming into contact with 7, this escape is prevented.

On the other hand, the lowering lock lever 57 rotatably supported on the chassis 52 by a shaft 56 is biased counterclockwise by a tension spring 58, and as the first disk lowering lever 530 rotates, the lowering lock lever 57 A pin 60 implanted in the lever 53 slides inside the dogleg-shaped slot 59 of the lever 53.

When the disk lowering lever 53 completes its operation, the pin 60 engages with the other end of the dogleg-shaped elongated hole 59 and maintains this state.

As can be seen from FIG. 5, which clearly shows the main parts, a pin 61 implanted in the first disk lowering lever 53 connects the lowering lever 53 and the lowering link 62, and the lowering link 62 It is rotatably supported by a shaft 63 fixed to the chassis 52. Therefore, when the sleeve slider 29 moves as described above, the disk lowering lever 53 rotates counterclockwise, and the lowering link 62 rotates clockwise.

A pin 64 is implanted at the end of this lowering link 62, and a second disk lowering lever 65 is connected to this pin 64. On the other hand, on the lower side of the chassis 52, there is a disc lifter lever 67 rotatably supported on a shaft 66 fixed to the chassis 52.
The pin 68 implanted in the second disk lowering lever 65 is engaged with the long hole 65h of the second disk lowering lever 65, thereby connecting the two. Therefore, the second disc lowering lever 6
5 is driven rightward in the figure, the disc lifter lever 67 rotates counterclockwise around the pin 66. In addition, the pin 6 implanted at the end of the disc lifter lever 67
9 extends upward through a rectangular long hole 170a of the connecting slide plate 170, and one end of the tension spring 70 is removed. The other end of the tension spring 70 is connected to the connecting slide plate 1
8i has been added to 70. Disc lifter lever 67
is rotated counterclockwise against the tension spring, and this tension spring causes the center cap 48, which had been raised, to descend.

To explain in more detail, the disc lifter lever 67
A differential bar 72 rotatably supported by a pin 71 provided at the other end is connected to disc lifters 73a and 7 at both ends thereof, respectively.
3b, and as the disc lifter lever 670 rotates, the disc lifter lever 670 rotates.
731 and 73b rotate. That is, as shown in FIG. 6, which is a view from the back, the shaft 76 is fixed to the chassis 52 or supported by the lid lever angle 75.
The disc lifters 733, 73b rotate using the fulcrum as a fulcrum.

This operation is shown more clearly in FIG. 7, which is an explanatory diagram in longitudinal section.
When the lever 72 is driven counterclockwise, it rotates clockwise. That is, the rift l-IJ ring 79, which had been pushed up by the tip 78 of the lever 72, and the center cap 48 coupled thereto rotated from the state shown by the solid line in FIG. 7 to the state shown by the one-dot chain line. The center cap shaft 80 descends using the center hole of the motor shaft as a guide.

In FIG. 7, the disk 1 is indicated by a two-dot chain line, but this is clearly stated for the purpose of explanation, and this state cannot occur during this operation. The disk 1 is placed inside the case 2, and the center cap 48 is lowered in conjunction with the insertion operation of the case 2.

When the case 2 passes over the center cap 48 and is further pushed in, it reaches the catching mechanism 90.

■ The lid and disc clamping mechanism 90 is for supporting the lid and disc within the playback device when the case is removed, and includes a mechanism for clamping the lid 3 and the disc 1, respectively, and related mechanisms. .

(B) Disengagement between the case 2 and the lid 3 As mentioned above, when the case 2 and the lid 3 are engaged, the hole 8 of the case and the protrusion 9 of the lid 3 are 32
．． It is released when 33 is opened.

However, as can be seen from FIG. 1, the side wall 10 of the case 2
The notch 5 formed on the inside of the lid 3 is still engaged with the hook 4 of the lid 3, and is locked at two positions on the left and right, and it is first necessary to release this lock.

For this purpose, a lid plate release lever 93 is provided at the rear of the R rail 28 (lid plate is synonymous with lid). As best shown in FIG. 3A, the lid plate release lever 93 is rotatably supported by a shaft 92 provided on the support portion 91, and biased counterclockwise by a hook spring (not shown).

Exactly the same mechanism is provided on the left side, and the third
As you can see in Figure A, the L lid plate release lever 93
This is L. The release lever 93L is the TR angle 9
It is provided on the F and L rails 95 fixed to 4.

These release levers 93 and 93L are located between the end 11 of the side 10 of the case 2 and the tip 12 of the lid 3 hook member 4, and when the case 2 is pushed strongly, A wedge-shaped member 96°96f4 is inserted between them. Then, the release levers 93, 93I are pushed by the side portion 11 and rotated inward, bending the hook portions 4'' inward, respectively. The hook member 4 can be cut out from the notch 5. The engagement between the case 2 and the lid 3 is completely released, and the case 2 is ready to be removed. The case is removed after the lid 3 and the disc 1 are clamped by a canching mechanism 100 (clamping mechanism) described below.

(4 Clamping of lid 3 In FIG. 3A, the catching mechanism 100 is shown including the disc catch mechanism.

FIG. 8 is a plan view showing only the necessary parts of the mechanism for clamping the lid 3, and FIG. 9 is a front view thereof, showing a state in which the lid 3 has already been clamped (caught).

Shaft 102.1 fixed to clamp chassis 101
Bush lever 1 rotatably supported by 03
The 04 and L bushing levers 105 are fixed to the elongated hole 1o7 of the L bushing lever 1o5 in 1jI with the cylindrical portion of the pin 106 via a (for example, a cambered) seat pin 106 installed in the k bushing lever 104, and are integrated into one body. It is configured to rotate. Still, the R and L button levers 104 and 105 have hook springs 108 and 1.08, respectively.
'('108' is attached in the same way as the hook spring 108 and is not shown), the tip thereof is biased so as to rotate toward the center of the disk 1. R
, I-button levers 104, 105 are pressed by the insertion force of the case 2, that is, the cover 3, and rotate, respectively. 104
It is rotatably supported on a pin 111 caulked to,
The P and R hangers 112 have pins 113 caulked to the clamping shaker 101 at one end, and are engaged through half-moon-shaped elongated holes 114, so that they swing as the K-button lever 104 moves. That is, it rotates counterclockwise while retreating as the lid 3 moves to the back, and ■.

The ends of the P and R hangers 112 are joined to the member 115, and the ends of the lid 3 are joined to the part 116 (state not shown in FIG. 8).

Exactly the same operation is carried out with the L bushing lever 117 symmetrically with the R bushing lever 112, so that the lid 3 is soiled in two places.

When the soil is filled, the lock lever with the tension spring 120
At 119, the l (button lever 104 (the same applies to the L button lever 105) is prevented from returning to its original position. That is,
The lock lever 119 is rotatably supported on a shaft 118 which is caulked to the clamping part chassis 101, and the spring hook at the end of the lock lever 119 is supported by a tension spring 120 stretched between the part 119a and the shake 101. Lock lever 119
The structure is such that the force is applied clockwise. Therefore, the lock lever 119 changes from the state shown in FIG.
Following the movement of the bushing lever 104, it is pushed by the F-cut part 121 of the pin 106 of the lever, and the F-cut part 1
21 passes over the cam portion 122 of the lock lever 119,
The locking lever 119 rotates clockwise, thereby preventing the bushing lever 104 from returning to its original position.

Of course, since the bushing lever 105 is also held together with the R bushing lever 104 by the pin 106, it is maintained in the same state (in the return prevention state 1).

In addition, in this example, as shown in Fig. 3, the left and right glue, P
. Since the lid 3 is also held between the support angles 123 and 124, the lid 3 can be supported reliably.

(c) Clamping the disc FIG. 11 is a plan view showing only the necessary parts for explaining the disc clamping mechanism, and FIG. 12 is a cross-sectional view of FIG. 11 taken approximately along the diameter of the disc.

Mainly referring to FIG. 12, the upper disc catcher 120
The lower disc catch 121 is rotatably supported by a shaft 123 supported by the catcher subframe 122.
The clockwise rotation of 21 is restricted by a pin 134 installed in a lower opening lever 133. That is, the lower disc catch 121 is connected to the hit lever 130 with two screws as shown in the figure, and the back end 131 of this lever 130 is connected to the pin 1 implanted in the chassis 01.
32, the clockwise rotation is restricted.

On the other hand, the lower disk catcher 120 is restricted in its movable range by the cam portion 127 of the lock lever 119. That is, in the upper disk catcher 120, the eccentric pin 124 has the necessary negative C1 by the spring type ring 125.
11, and is rotatably supported with an eccentric pin 12.
This is because the tapered portion 126 at the tip of the lock lever 119 is in contact with the cam portion 127 of the lock lever 119. To be more specific, the first
As shown in Figure 3, the lock lever 1 is indicated by the two-dot chain line.
The state of clockwise rotation shown by the solid line from 19 to
．． 1050 based on the concave movement, the degree of freedom shown by S is almost gone, and this limits the counterclockwise rotation of the lower disc catcher 1200.

As shown in FIG. 12, the upper disc catcher 120 is biased counterclockwise by the leaf spring 135, so when the upper disc catcher 120 has the stroke S shown in FIG. The cover 3 and the group guard 136 of the disc 1 can be smoothly pushed in by rotating slightly counterclockwise from the state shown in FIG. Since the stroke S is almost eliminated by the recessed movement of the lock lever 1190, as shown in FIG. 136 can be held securely.

Note that the claws 137 and 138 of the lower disk catcher 120 and the lower disk catcher 121 are connected to the disk 1.
The gap between the two can be adjusted by rotating the eccentric pin 124. That is, the state of contact between the tip detail 126 of the eccentric pin 124 and the cam portion 127 of the lock lever 119 is changed, and preferably, the head 139 of the eccentric pin 124 and the lower disk catcher 120 are bonded together. This makes it possible to maintain a fixed appropriate gap.

As mentioned above, the lid plate release lever 93.93L
The engagement between the case 2 and the lid 3 is released, and the lid 3 and the disc 1 are clamped by the lid and disc catching mechanism, so that by pulling out the case 2, the disc 1 is set in the main body of the apparatus.

■ Driving (raising) the center cap In conjunction with the action of pulling out the case 2, the center cap 48 rises. This is the drive of the center cap (
This is the reverse operation of the operation described in (descent).

Briefly, before pulling it out, press the lowering lock lever 5.
7 (FIG. 3) is located on the right end side of the dogleg-shaped elongated hole 59 of the disc lowering lever 53, and when it is pulled out, the head 140 of the lowering lock lever 57 is moved by the shaft 49 of the It sleeve slider 29. Can be pushed off. During the return to the state shown in FIG. 3, the center cap 48 rises in the opposite direction to the lowering, engages with the center hole 11 of the disk 1, supports the lower surface of the disk 1, and stops.

When the case 2 is further pulled out, the state shown in FIG. 4B changes from the state shown in FIG. 4A. ”2, Shimonoseki Donkey-32,3
3 and the case 2 are released, the case 2 is completely pulled out, and the installation of the disk 71 is temporarily completed.

■ Placing the disk on the turntable Next, it is necessary to place the disk 1 on the turntable 141. For this purpose, it is first necessary to rotate the lower disk catcher 121 largely clockwise as shown in FIG.

(a) Disengagement of the lower disk catcher In FIG. 12, first, the contact state between the back end 131 of the contact lever 130 and the pin 134 of the lower catch lever 133 is released. 133 is rotated toward the back of the page in FIG.

Before this explanation, to explain the background from a different perspective by returning to FIG.
One end is engaged with the lower end lever link 145 by a pin 144, and the other end is engaged with the lower end lever link 145 by a pin 146.
47. Still, the above lower opening connection bar 1
45 is a tension spring 148 whose other end is hung on the chassis 52
, and biases the lower opening release lever 142 counterclockwise, so that the lever 1
42 has the k sleeve slider 29 on top and the upper donkey 3
When moving to the back of 2 and 33, it rotates counterclockwise. On the other hand, the lower lever link 147 rotatably supported on the catcher chassis 101 by a shaft 149 rotates clockwise based on the spring bias, and the link 1
47 is secured to the lower opening lever 133 by a pin 150, so that the lever 133 rotates counterclockwise.

As shown in FIGS. 11 and 12, and as explained with reference to FIGS. 11 and 12, the lower disk catcher 121
Its rotation is restricted while it is being held in place.

Now, as described above, when the mounting of the disc 1 is completed and the R sleeve slider 29 returns to the position shown in FIG. The contact portion 151 is brought into contact with the lever 142, and the lever 142 is rotated clockwise against the pull spring 148, and the W surface end 131 of the contact lever 130 and the lower The contact between the lip lever 133 and the pin 134 is released.

Next, the disc 1 is placed on the turntable 141. This action is performed in response to the movement of the connecting slide plate 170 in the direction B shown in FIG. 3, and the lower disc catcher 121 is moved downward. The center cap 48 descends as it rotates. Now, the operation of the connecting slide plate 170 will be explained.

Play button (a specific one of the operation buttons 23 in Figure 2)'
When is pressed, the feed motor 155 shown in FIG. 3 rotates four times. This H1li force is applied to the feed pulley 156° and the feed belt 1.
The worm 158 is rotated via the shaft 57. Furthermore, the power is transmitted to the worm wheel 159, and a timing belt gear (not shown) is molded simultaneously with the worm wheel.
and the timing belt 16 hung on the counter roller 160.
1 is driven. Here, the shaft 1 of the pair of rollers 160
62, shaft 163 of worm wheel 159. The shaft support base 164 of the worm 158 is supported by a feed sub-chassis 165'', which is fixed to the chassis 52.

is connected to the timing belt 161 by a timing belt fixing plate 168, and the rotation of the feed motor 155 causes the slide base 166 to move in the direction of arrow I.
Move in direction 3.

Further, the slide base 166 is provided with a convex portion 169 facing downward, and the convex portion 169 is connected to the shirt lug provided on the slide plate 170.
It is coupled to a roller 172 that is rotatably supported by a connecting lever 171 that is pivotally supported by -171. Connection lever 17
1 is engaged with a movable core 175 of a connecting solenoid 174 attached to a connecting slide plate 170, and when the current of the solenoid 174 is cut off, the roller 172 and the protrusion 169 of the slide base 166 are engaged with each other. It is released by a tension spring 176.

Now, the connecting slide plate 170 has three guide pins 172, 17' which are caulked to the chassis 52; .

172''(172',172'' are not shown), and is biased by a connecting slide plate return spring 173 which is a tension spring, and as the slide base 166 moves, the return spring 173 be pulled and move.

Due to this movement of the connecting slide plate 170 in the B direction, the lower disk catcher 1210 rotates I! At the same time, the center cap 48 is lowered and the disc 1 is placed on the turntable 141. First, lower disc catcher 1
210 rotation will be explained.

(b) At the right end of the slide plate 170 directly connected to rotation of the lower disc catch, there is a pin 177 implanted in the slide plate. This pin 177 and chassis 5
A lifter connection lever 181 rotatably supported by a shaft 180 crimped at 2 is engaged. The other end of this lever 181 is engaged with a lifter connecting bar 183 through a pin 182 implanted on the lever 181.

is engaged with. The lifter connection lever 186 is rotatably supported by a shaft 185 provided on the chassis 52, and a shaft 187 implanted on the connection bar 186 at its end is engaged with a catcher lifter 188. Therefore, the catcher lifter 1
88 is a pin 189.1'89 installed upright on the chassis 52.
'(189' is not shown). That is, when the connecting slide plate 170 slides in the direction of arrow B, the catcher lifter 188 slides in the direction opposite to arrow A. Thus, as shown in FIG. 3B, the lower disc catcher 121 is rotated counterclockwise about the shaft 123 by the U-shaped groove 189 of the catcher lifter 188 and the pin 190 of the hit lever 130 attached to the lower disc catcher 121. move.

In this way, the attachment on the lower side of the disk 1 is released, so that the disk 1 can descend downward.

(c) As the center cap descends, the disk 1 moves in the direction of the disk lowering connecting slide plate 1700B, thereby lowering the disk 1 in synchronization with the rotation of the lower disk catcher 1210.

As mentioned earlier, the tension spring 70 tensioned between the pin 69 of the disc lifter lever 67 (FIG. 5) shown in the center cap drive mechanism and the cut-out member 193 formed on the connecting slide plate 170 allows the pin to be moved. 69 is a long hole 170
is pressed against the end 194 of a. The tension spring 7
0, the center cap 48, that is, the disc 1 is pushed upward, and by moving in the direction of the connecting slide plate 1700B, the disc lifter 67 (Fig. 5) is rotated counterclockwise, and clockwise in Fig. 6. move.

This operation is based on the K-sleeve slider 290 roller 50 when the case 2 is inserted, and the disk lowering lever 53.
Lowering link 62. This is basically the same operation as lowering the center cap 48 through the respective disc lowering levers 65, and if viewed from the side, the center cap 48 with the disc 1 placed on it (its The shaft portion 80) descends, and the turntable 14
The disc 1 is placed on top of the disc 1.

In addition, as shown in FIG. 3, the connecting slide plate 170 is
When the guide slot 195 is engaged with the pin 172 and moved in the direction B, and the pin 172 and the left end of the slot 195 come into contact (this completes the placement of the disc 1 on the turntable 141). ), from then on, only the slide table 166 moves to the right.

(2) The performance slide stand 166 is also shown in FIG. 14, and an arm housing 201 having a playback needle 200 is attached to the slide stand 166. A roller support member 202 is attached to one end of the arm housing 201, and a roller (
(not shown) is mounted on the chassis 52 (FIG. 3).
Rotate above. That is, the arm housing 2o1. The slide table 166 can be slid by the feed motor 155.

Referring again to FIG. 14, when the playback needle 200 comes above the disk 1 on the turntable 141, the disk motor 205 is rotated to lower the needle 200 into contact with the disk 1. The picked up information signal is reproduced via an electrical or electronic circuit.

The following explanation is about the mechanism for stopping the performance, storing the disc 1 in the case 2 again, and taking it out.

(2) Stopping the performance When the playback stop button is operated, the playback needle 200 that was in contact with the disc 1 and reproducing the signal is lifted, and the disc motor 205 is stopped. Next, the feed motor 155
rotates and drives the arm housing 201 in a direction away from the center cap 48, that is, the slide base 166 in the state shown in FIG.

When the slide base 166 moves in the opposite direction to the direction B, the convex portion 169 of the rigging 166 and the roller 172 of the connecting lever 171
comes into contact. Then, the connecting slide plate 170 is driven in the direction opposite to the arrow B. By driving in the opposite direction, an operation completely opposite to the above-described disk setting operation is executed, so that the disk 1 is lifted by the center cap 48 and the lower disk catcher 12 is lifted.
1 rotates from below to the edge of the disk 1, and at that part the lower surface of the disk 1<,,'7. hold As shown in FIG. 3B, the disc 11-1 is again held by the upper and lower disc catchers.

Next is a disc recovery operation in which the empty case 2 is inserted into the playback device 20, the disc 1 is stored therein, and the disc 1 is taken out of the playback device.

■ Expansion of case opening ■ Driving the center cap (lowering) Insert the empty case 2 into the insertion port 21 of the playback device 20.

When loading the disk, that is ■.

Exactly the same behavior as described in ■, Case 2 is above.

The center cap is expanded by the lower donkeys 32 and 33, and lowered by the disk lowering lever 53.

At this time, the part of the disc 1 close to the insertion slot 21 is already inside the case 2, while the part far from the insertion slot 21 is caught by the lower disc catcher 120° 121, so the disc 1 does not fall. There's nothing to do.

In addition, in case of an emergency, a case containing a disc may be inserted, but we will mention this prevention measure. The disk detection lock lever 206 performs the main function. That is, the lever 206 is connected to a disk detection link 207 attached to the K-button lever 104, and since the K-button lever 104 is configured to operate depending on whether or not the disk 1 is inserted, the lever 206 is connected to the disk detection link 207 attached to the K-button lever 104. Double insertion can be prevented by 1.

Additionally, the disc case is not inserted during the above-mentioned performance from 1 onwards. Since these matters are not directly related to the present invention, they will not be mentioned further.

[Phase] This is the operation until the disk 1 is completely stored in the disk storage case 2 and the lid 3 is closed.

The disc release mechanism in the catcher section is executed by a mechanism path separate from that of the clamping mechanism.

The explanation will be given by adding FIG. 15 to FIGS. 8 to 11.

FIG. 15 is a schematic side view taken along the line XX in FIG. 8 and viewed in the direction of the arrow, showing only necessary parts.

In FIG. 15, the case 2 opened by the lower opening levers 32 and 33 contains almost 11M of disks 1, but if further insertion is performed from here, the front end of the opening bar 320 210 abuts the end 212 of the interlocking bushing lever 211.

Catcher -> recovery rocker arm 21 rotatably supported on a shaft 214 swaged by the knob frame 122
3 rotatably supports an interlocking bushing lever 211 by a shaft 215 at its second end, and is engaged with a collection operation bar 217 by a shaft 216 at its lower end. Still, the interlocking bush lever 211 is not connected to the tension spring 21.
7a connects the spring handle, which is part of the L-button lever 105, to the lever 218. Therefore, the center of the interlocking bushing lever 211id shaft 215 and both sides of the tension spring 217a are stabilized in a position where the holes are in a straight line, so that as the L bushing lever 105 rotates, the lever 211 can be rotated gently.

Now, when the disc is being clamped, ■-button lever 105 is in the position shown in Figures 8 and 15.
- Button lever 211 interlocked by opening bar 32
is pushed, and the recovery rocker arm 213 is rotated counterclockwise to push the recovery operation bar 2 (7). In other words, in FIG.
20 counterclockwise against 4U. As a result, pin 1 of the lock lever 119 and the bushing lever 104
21 rotates in a direction facing the center of the disk 1.

At this point, the reverse operation to that during disk loading is performed, and the lid 3 and the disk 1 are loaded by the lid contact portions 109, 110 of the L and R button levers 104, 105.
is pushed out and stored in the case 2.

In addition, prior to this extrusion, the left and right r-, p, and hanger 112, 112' members 115, l l
5' and M3 are disengaged from member 116, lI6'.

Even if a new disk case is inserted, the lock lever 119 will not operate. That is, as shown in FIG. 15, when the bushing lever 105 moves to the right, the lower part of the tension spring 217a moves, and the interlocking bushing lever 211 rotates counterclockwise. As a result, even if the upper lever 32 enters the disc mounting hole again, the bar 32 and the bushing lever 211 will not come into contact with each other.

In a preferred embodiment of the playback device according to the present invention, the third
As shown in Figure A, Figure 5, Figure 11 and Figure 15,
A pair of bushing rods 220, 220 are provided. This bushing rod 220, as particularly shown in FIG. 15, is slidably supported by the catcher subframe 122 and is always biased to the right in the figure by a spring 222. Butsch rod 22
The right end surface of 0 is on the extension line of the approach locus of the lid 3. This bushing rod 220 works advantageously especially when pushing out the lid 3.

The background will be explained with reference to FIG. '' The end 210 of the two-opening donkey 32 and the end 212 of the interlocking bushing lever 211 come into contact, and the lever 211 is driven to R.

Based on the release of the locks of the L bush levers 104 and 105 (FIG. 8) and the release of the lock of the lower disk catcher 120, and the release of the two locks mentioned in 2 above, the R bush levers 104 and 105 are released. The manner in which the disk 1 and the lid 3 are pushed into the case 2 by the contact portions 109 and 110 that contact the lid 3 and the seven springs 108 has been described above. Here, if the operator operates Case 2 relatively quickly (trying to pull it out suddenly)
, pin 106 of L button lever 105 and lock lever
Even if the convergence with 119 is broken (Fig. 8), R,
The I-button levers 104 and 105 have a relatively large inertial load, and R, L glue, P, and hanger 115.11
There is also an inertial load such as 7, and the R, I-button lever 10
4,105 cannot operate at high speed. Furthermore, since the hook portion 4 of the lid 3 and the engagement recess 5 of the case 2 only engage with each other when the lid 3 is pushed out,
” - As stated, R,L butsch lever 104.105
If the case 2 is pulled out faster than the lid 3 can be pushed out,
The hook portion 4 does not engage with the engagement recess 5 of the case 2 and only partially closes the case 2. In some cases, there is a risk that the lid 3 may fall off.

Therefore, the lid 3 is reliably pushed into the case 2 by a pair of bushing rods 220, each of which is biased in the anti-insertion direction by a spring 222.

The bushing rod 220 is attached to the end surface 3 of the lid 3 when the case is inserted.
It is pressed in the insertion direction (inward) at point a, and elastic energy is stored in the spring 222, and when the case is removed, the lid 3 is pushed out at high speed with this elastic energy. The stroke of this extrusion is k, ■-button lever 104, 10
Since the straw can be longer than that shown in Fig. 5, the operating time for contacting the lid 3 can be extended, and the lid 3 can be reliably pushed into the case 2.

In this way, a simple mechanism combining a spring and a rod can ensure reliable operation, which has great advantages.

As described above in detail, according to the present invention, the lower disk catcher 121 and the upper disk catcher 120 clamp the disk 1, and the end portion 131 of the lever 130 and the lower opening lever 121 and the lower end lever −
Since the pin 134 of 133 can be completely locked in the escape direction, the disc 1 can be reliably held, and the disc can be reliably loaded and unloaded. Furthermore, the lower opening lever 133 is composed of a simple mechanism driven by the positioning roller 51 of the slider 29, and is a simple mechanism that enables rotation of the lower disk catcher 1210 and driving of the center cap 48 by one feed motor 155. Since it has a mechanism configuration, it is possible to reduce the cost of the device.

Although the above explanation relates to a playback device related to a video disc, the present invention applies to a so-called RCA system,
VI (Does not depend on the type of D method etc.

Furthermore, the present invention can be applied not only to video discs but also to information discs such as digital audio discs and chill vision discs. Further, the information recording medium may be magnetic or optical, and may be a rewritable or rewriteable disk (including an optical disk). In this way, it should be noted that the device according to the present invention is applicable to all cased disc-shaped information media regardless of their diameter.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view of a case in which a disc is stored, Fig. 2 is an external view of a playback device according to the present invention, Fig. 3A is a plan view of the inside of the playback device, and Fig. 3B is a disc catcher section. Figure 3C is a right side view of a part of the slider.
Figures 4A and 4B are explanatory diagrams of the expansion of the case opening, and Figure 5.
The figure is a partially omitted plan view of the inside of the playback device, FIG. 6 is a partially omitted back view of the inside of the playback device seen from the back side, FIG. 7 is an explanatory diagram of the raising and lowering of the center cap, and FIG. 9 is a front view of the same, FIG. 10 is an explanatory diagram of the operation of the lock lever 119, FIG. 11 is a plan view of the disc scanner section, and FIG. 12 is a diagram showing approximately the diameter of the disc. 14 is a partially cutaway perspective view of the lever illustrating disk performance, and FIG. 15 is a cross-sectional view taken along line X-X in FIG. It is a schematic side view cut along and seen in the arrow direction. 1... Disc, 2... Case, 3.
... Lid, 20 ... Playback device, 29 ...
... Slider, 120 ... Upper disk catcher, 121 ... Lower disk catcher, 1
30... Hitting lever, 131... Rear end, 133... Bottom opening lever J3゛4...
····pin. Patent applicant: Sharp Co., Ltd. Representative: Patent attorney: Aoyama Aoyama and two others Figure 4B, Figure 4A

Claims (3)

[Claims] (1) Insert a case that stores the information disc into a playback device, take out the information disc from the case within the device, and use a clamp that clamps the information disc to the mechanism that stores the information disc in the case. An information disc playback device comprising means for rotating at least one of the upper and lower holding members of the holding means, and means for preventing rotation of the holding member. . (2) The rotation prevention means of the holding member is such that the mechanism for expanding the case opening through which the information disc enters and exits has completed its operation, or the support member that supports the information disc at the center is a turntable. The information disc playback device according to claim 1, wherein the information disc playback device is interlocked with the operation of the case opening expansion mechanism until the case starts to descend. (3) The case is provided with a lid that closes the case opening, and is driven by the lid when the case with a lid is inserted,
In addition to the first means for pushing the lid into the case when the case is removed, the lid is elastically brought into contact with the lid and when the case is removed, the lid is quickly pushed into the case using the elastic energy accumulated during the insertion. Claim (1) or @(
2) The information disk reproducing device described in section 2).