JPS6226838Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a recording medium lifting mechanism for a disc-shaped recording medium playback device, and is configured to automatically lower a recording medium support mechanism in the device when the playback device is disconnected from the power source. In case the power is cut off while the case is being inserted to collect the recording medium, the recording medium lifting mechanism is designed to prevent the above-mentioned lowering operation to prevent errors in collecting the recording medium. The purpose is to provide.

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a schematic perspective view and a schematic longitudinal sectional front view showing the internal structure of an embodiment of a disk-shaped recording medium reproducing device, respectively, and FIGS. 3 to 5 are an embodiment of the recording medium lifting mechanism according to the present invention. FIGS. 6 and 7 are plan views of main parts in different operating states of the example, and are plan views for explaining the operation of the lifting mechanism lock lever when it is unlocked and when it is locked, respectively.

In FIGS. 1 and 2, a reproducing device 1 is for reproducing signals recorded on a signal recording surface of a disk-shaped recording medium (hereinafter referred to as a disk) 2. As shown in FIG. In this embodiment, the disc 2 cannot be inserted unless the plug 3a at the end of the power cord 3 is connected to the power terminal (not shown), and the disc 2 is prevented from being inserted during playback. , so-called double insertion of the disk 2 is prevented.

In addition, in this embodiment, especially when the power cord 3 is accidentally connected while the disc 2 is inserted into the playback device,
If the disk 2 is pulled out, the disk 2 in the standby position is automatically lowered to the playback position to prevent the disk 2 from being deformed. Furthermore, if the power is cut off during the insertion or recovery operation of the disk 2, the configuration is such that the disk 2 can be reliably mounted and recovered by prohibiting the lowering.

The disk 2 is housed in a case 4, and the opening of the case 4 is covered with a removable lid 5. Therefore, the disk 2 is inserted while being housed in the case 4, and the case 4 is inserted into the opening of the playback device 1 with the lid 5 side facing up. The opening of the playback device 1 is provided with an opener 6 for opening the inserted case 4, and the opener 6 includes a slider 9a, which is movable on a pair of guide rails 8a, 8b on the chassis 7. Both ends are supported by the case 9b, and its opening is opened in conjunction with the insertion operation of the case 4. A guide pin 10 is provided protruding from the lower surface of one of the sliders 9a, and as shown in FIGS. 3 to 5, on the path 10a of this guide pin 10, there is an incorrect insertion prevention lever 11, a lifter lock lever 12, and a lifter lock lever 12, which will be described later. Each end of a lift lever 13 and a lock lever 14 for locking the lifter lift lever 13 are provided so as to be freely movable in and out.

First, the overall playback operation of the playback device 1 will be outlined.
As the case 4 is inserted, the lifter 15, which serves as a disc-shaped recording medium support and is located at a standby position on the insertion path, descends to the playback position, which is at about the same height as the rotating surface of the turntable 16, and is removed from the disk insertion path. . Then, when the case 4 is further inserted, the lid 5
Both ends of the playback device 1 are held and latched between rods 17a and 17b and rods 18a and 18b provided on both sides of the back of the playback device 1, respectively. The disk 2 inside the case 4 is clamped between a pair of clamp members 19 and 20 provided at the rear center of the playback device 1.

After the lid 5 is latched and the disk 2 is clamped in this way, when the case 4 is pulled out of the playback device 1, the disk 2 is moved to the lifter 1 in the standby position.
The central portion is supported on the reproducing device 1 and remains in the reproducing device 1. Next, when regeneration is started by operating a regeneration button (not shown) or the like, the clamp members 19 and 20 release the clamp, and the lifter 15 in the standby position
is lowered to a playback position substantially on the same plane as the rotating surface of the turntable 16. As the lifter 15 descends to the playback position, the disk 2 moves onto the turntable 16.
It is placed on top and is ready for playback.

At the same time, the turntable drive motor 21 is driven, and the turntable 16 is rotationally driven.
Carrier 2 movable left and right inside the playback device 1
A signal recorded on the signal recording surface of the disc 2 is reproduced by a pickup mechanism 24 provided at the disc 3.

When the playback is completed, the carrier 23 returns to its original position, and after the rotation of the turntable 16 has stopped, the lifter 15 rises and returns from the playback position to the standby position, and the disk 2 moves back to the clamp member 1.
9 and 20. Then, by inserting the empty case 4 into the playback device 1 in this state, the disk 2 and the lid 5 are housed in the case 4 in this order. When the case 4 is inserted to the innermost part, the disk 2 is unclamped and the lid 5 is unlatched, and the lid 5 is connected to the opening of the case 4. Therefore, inserted case 4
By pulling out the disc 2 and the case 4, the disc 2 is taken out of the playback device 1.

Next, the elevating mechanism of the lifter 15 will be explained.
The turntable drive motor 21 is attached to the approximate center of the chassis 7, and a center spindle 25 is attached to the tip of the motor shaft 22. The outer peripheral tapered surface of the center spindle 25 has a diameter that fits into the inner diameter of the disk 2. A ring-shaped lifter 15 with a slightly larger diameter than the outer diameter of the center spindle 25 is provided in the center of the turntable 16 as a disc-shaped recording medium support, and is movable up and down within a predetermined range. As the letter-shaped elevator 26 moves up and down, it is displaced between the standby position at the upper end and the playback position at the lower end.

The base of the elevator 26 is fitted into a guide column 27 installed on the chassis 7 so as to be slidable in the vertical direction, and is pulled up and down by a wire 28 to be raised and lowered in the vertical direction. One end of the wire 28 is tied to the elevator 26, and the wire 28 is first wound around a roller 29 near the guide column 27, changed direction from vertical to horizontal, and then wound around a roller 30 provided on the underside of the lifter elevating lever 13. A reel 3 that is spliced and turned in the opposite direction, and whose other end is integrated with a disc cam 31.
It is tied to 2. A gear 33 having teeth formed on a part of its outer periphery is coaxially integrated with the disc cam 31, and this gear 33 receives the forward and reverse rotational power of the lifting motor 34 via a reduction gear mechanism to be described later. communicated. The rotational power of the lifting motor 34 is transmitted to the belt 3 from a pulley 35 attached to the motor shaft 34a.
6 to the pulley 37, the gear 38 coaxially integrated with the pulley 37 to the gear 39, and further transmitted to the large diameter gear 40 by the small diameter gear 39a coaxially integrated with the gear 39, and the lower surface of the large diameter gear 40. The signal is transmitted to the final stage gear 33 by a gear 40a that is coaxially integrated with the gear 33.

The driven-side pulley 37 and gear 38 are pivotally supported by the end of a rotating lever 42 that is pivotally supported on a shaft 41, and as the rotating lever 42 rotates, the gear 38 comes into contact with the gear 39. Separate. One end of a coil spring 43 is locked to the other end of the rotating lever 42.
The rotating lever 42 is biased counterclockwise in the figure by the spring force of a spring 43. Also, rotating lever 4
One end of a plunger 44p of a plunger/solenoid mechanism 44 is locked on the other end of the plunger 44p on the opposite side of the spring 43, and when the regenerator 1 is connected to a power source, the solenoid 44s is energized and the plunger is activated. 44p is suctioned, and from the state shown in FIG.
The state shown in the figure will be reached. Therefore, the rotation lever 42
When the power supply is connected, the shaft 41 resists the spring 43.
The gears 38 and 39 are rotated clockwise around .
They mesh with each other.

Further, since the lifting motor 34 is energized and driven in the normal direction at the same time as the power plug 3a is connected, the gear 3
3 rotates counterclockwise in the figure. As a result, the wire 28 winds up the reel 32, so the elevator 26 is lifted upward, and the lifter 15 rises from the playback position to the standby position.

Here, cam grooves 45 and 46 are formed at two places on the outer periphery of the disc cam 31, and one end of the two L-shaped levers 47 and 48 is attached to the corresponding cam groove 4.
5, 46. In this embodiment, the lifter 15
When the lever 47 is in the regeneration position, the other end of the lever 47 is engaged with the cam groove 45, as shown in FIGS. 3 and 4, and when the lifter 15 is raised to the standby position, one end of the lever 48 is As shown in FIG. 5, it engages with the cam groove 46 and locks the disk cam 31.
Further, the locking operation at that time causes the other end of the lever 48 to actuate the actuator 49a of the micro switch 49 for stopping the lifting motor 34. When the micro switch 49 is operated, the electric power to the lifting motor 34 is cut off and the lifting motor 34 is stopped.

In this way, by connecting the power plug 3a, the lifter 15 is driven upward to the standby position. and,
In this standby state, the wire 28 is pulled downward by the weight of the movable parts such as the elevator 26 and the lifter 15 attached thereto, but the disc cam 31 is locked by the lever 48. Therefore, the wire 28 will not be rewound.

Here, when the power plug 3a connected to the power terminal is pulled out, the power to the solenoid 44s is cut off at the same time as the plug 3a is pulled out, and the rotating lever 42 is rotated counterclockwise by the force of the spring 43. . At this time, the rotating lever 42 rotates the lever 48 in the direction away from the cam groove 46, so that the lever 48 is disengaged from the disc cam 31, and the lifter 15 and elevator 26 are moved to the standby position by their own weight. to the playback position, and the third
The state shown in the figure will be reached.

In this way, when the lifter 15 descends to the regeneration position, one end of the other lever 47 is connected to the disc cam 31.
The disc cam 31 is also locked in the playback position. Further, due to the rotation of the lever 47 due to the engagement of the lever 47 with the cam groove 45,
The other end of the lever 47 operates the actuator 49a of the micro switch 49, and the motor 34 is de-energized and stopped at the same time as the disc cam 31 is locked. Incidentally, during regeneration, the lifter 15 is lowered to the regeneration position by reversing the lifting motor 34.

Note that the playback device 1 of this embodiment is designed to take into account the case where the playback button is not pressed immediately after the disk 2 is installed in the playback device 1, so that the playback device 1 does not play the disk 2, for example.
The solenoid 44s is configured to operate a timer (not shown) when a certain period of time has elapsed after the solenoid 44s is inserted, and automatically cut off the current to the solenoid 44s. In this case, the rotation of the lever 48 releases the lock on the disc cam 31, whereby the lifter 15 automatically descends from the standby position to the regeneration position. Therefore, the disk 2, which has been in an irregular supported state only by the lifter 15 at the standby position, is lowered to the playback position and supported on the turntable 16 without being left in that state for a long period of time, and thereby the playback device 1 Deformation of the disk 2, which is susceptible to deformation due to the influence of internal heat, can be effectively prevented.

This function of preventing deformation of the disk 2 by automatically lowering the lifter 15 is similarly performed even when the disk is left in the playback device 1 and the power is turned off.

In this way, when the playback device 1 is not connected to the power source, the lifter 15 is at the playback position at the same height as the rotating surface of the turntable 22, and when the disk is inserted or recovered, the lifter 15 Clamp members 19, 2 that clamp the
0 is also in a fully expanded unclamped state. Therefore, if the disc 2 is inserted in this state, there is a risk that the disc 2 will fall out within the playback device 1. Therefore, it is necessary to prevent erroneous insertion before connecting the power supply, and the operation for preventing erroneous insertion will be explained below.

Reference numeral 50 denotes a substantially quadrant-shaped cam that cooperates with the erroneous insertion prevention lever 11, and is provided coaxially and integrally with the disk cam 31. The incorrect insertion prevention lever 11 is biased clockwise in the figure about the shaft 11a by the spring 51, and one end thereof is in contact with the circumferential surface of the cam 50. When the cam 50 is in the playback position, one end of the incorrect insertion prevention lever 11 rests on the small diameter cam surface 50a of the cam 50, and the other end rests on the guide pin 10.
The vehicle is entering the path 10a of the vehicle. For this reason, the slider 9a of the opener 6 is locked so that it cannot move forward, and therefore the disk 2 cannot be inserted.

Although the above-mentioned inconvenience can be eliminated by preventing erroneous insertion of the disk before the power is connected in this way, the erroneous insertion prevention function provided by the erroneous insertion prevention lever 11 also works effectively during playback of the disk 2.
It is a matter of course for such a playback device 1 to prevent so-called double insertion, where another disk is inserted while playing back disk 2. By preventing erroneous insertion of the disk 2, the safety and insertion of the disk 2 can be further ensured.

When the lifter 15 rises to the standby position due to the connection of the power plug 3a, the cam 50 rotates with the rotation of the gear 33, and the erroneous insertion prevention lever 1
One end of the lever 11 rides on the large-diameter cam surface 50b, and the lever 11 rotates counterclockwise. As a result, the other end of the lever 11 moves out of the path 10a of the guide pin 10, and the slider 9a is released from being locked by the guide pin 10. Therefore, the disk 2 can be inserted by connecting the power plug 3a.

Here, as described above, when the case 4 containing the disk 2 is inserted into the opening of the opener 6 and pushed into the playback device 1, as the sliders 9a and 9b move forward, one end of the case 4 is pushed into the guide pin 10. The lifter lock lever 12, which had been abutted and locked, is attached to the shaft 1.
The guide pin 10 can rotate on the path 10a around the guide pin 2a. At this time, since the gear 33 is in the regeneration position, the cam groove formed on the outer periphery of the gear 33
The other end of the lifter lock lever 12 faces 2. Therefore, when the rotation prevention state of the lock lever 12 is released by the movement of the guide pin 10, the lock lever 12 is rotated clockwise by the spring force of the spring 53, and the other end is rotated as shown in FIG. engages with the cam groove 52. As a result, the gear 33 is locked in the standby position by the lock lever 12, but as mentioned above, the disc cam 31, which is coaxial with the gear 33, is already locked in the regeneration position by the lever 48. Gear 33, disk cam 3
1, reel 32, etc. are in a double lock state.

In this way, after the case 4 is inserted into the playback device 1, the reel 32 is brought into a double lock state by the lever 48 and the lock lever 12. Therefore, if the power cord 3 is accidentally stepped on and the power plug 3a comes off from the power terminal while inserting the case 4, the power supply to the solenoid 44s is de-energized and the lever 48 is turned off. Although the plate cam 31 is unlocked, the gear 33
is locked by a lock lever 12.
Therefore, in such a case, even if the power is cut off, the lifter 15 is locked in the standby position, and the lifter 15 will not be lowered while the case 4 is being inserted.

Assuming now that the lifter 15, which should be in the standby position, is lowered during insertion of the case 4, the disk clamp members 19 and 20 will also be completely unclamped at the same time as the lifter 15 is lowered.
For this reason, case 4 is used for the purpose of mounting disk 2.
In the case of insertion, since the inserted disk 2 is not clamped, the disk 2 is thrown out inside the playback device 1 when the case 4 is pulled out, making it difficult to recover it by normal methods.
Even if it can be recovered, there is a risk of significant damage to the signal recording surface.

Furthermore, when inserting the case 4 for the purpose of recovering the disk 2, since the lifter 15 has been lowered when the empty case 4 is inserted, there is a gap between the opening of the case 4 and the disk to be recovered. This causes the inconvenience that the height of the disk 2 is shifted and the disk 2 cannot be recovered into the case 4.

Since the playback device 1 is configured so that the lifter 15 will not fall even if the power is turned off while it is inserted into the case 4, this type of inconvenience can be reliably prevented. This allows safe and reliable insertion and retrieval of the disk 2.

Next, the elevating and lowering operation of the lifter 15 by the lifter elevating lever 13 when inserting the disk 2 will be explained.

When the guide pin 10 is displaced to the position shown by the dashed line in FIG.
The lever 13 is pushed and rotated clockwise about the shaft 12a against the spring 54 by coming into contact with one end of the lifter elevating lever 13 that closes the shaft 12a.

A lock lever 14 for locking the lever 13 is pivotably supported below the lever 13 so as to be pivotable in a click-like manner about a shaft 14a. As shown in FIGS. 6 and 7, the lock lever 14 has one end divided into a pair of arm parts 55 and 56, and the other end that engages with the engagement protrusion 57 of the lifter elevating lever 13 from the inside. An engaging pin 58 is implanted. 59
is a torsion spring that presses the lock lever 14 in a click-like manner.
One end is locked to the chassis 7, and the other end is locked to a proper position on the chassis 7.

When the guide pin 10 is displaced to the position shown by the two-dot chain line in FIG. 5, the guide pin 10 comes into contact with one leg 55 and pushes it in the advancing direction as shown in FIG. 6. As a result, the spring locking pin 60 is attached to the shaft 14.
When the lock lever 14 crosses the line connecting the other end of the spring 59 and the other end of the spring 59, the lock lever 14 rotates clockwise in a clicking manner and engages as shown by the two-dot chain line in FIG. 5 and as shown in FIG. The pin 58 is the lifter elevating lever 13
It engages with the engagement protrusion 57 of. As a result, the lifter elevating lever 13 is locked in the state shown by the two-dot chain line in the figure.

In this way, as the guide pin 10 passes, the lifter elevating lever 13 is rotationally displaced from the position shown by the solid line to the position shown by the two-dot chain line, that is, from the state shown in FIG. 3 to the state shown in FIG. The wire 28, which had been under tension by being attached to the roller 30 on the lower surface of the lever 13, is loosened, and the lifter 15 and elevator 26 are lowered by their own weight to the regeneration position.

In this way, as the case 4 is inserted, the lifter 15 can be lowered to the playback position where it does not interfere with the insertion of the case, without driving the lifter lifting/lowering motor 34 in reverse.

Here, the force required to rotate the lifter elevating lever 13 can be adjusted appropriately by varying the tension of the spring 54, and anyone can move the case 4 with a slight force.
It is possible to insert .

Once the lifter 15 is locked in the playback position,
It remains in this state while the case 4 is inserted, and is unlocked by the guide pin 10 when the disk 2 is finished clamping and the empty case 4 is pulled out. In this case, when the guide pin 10 has retreated to the position shown by the three-dot chain line in FIG. 5, it comes into contact with the other leg 56 of the lock lever 14 and pushes the lock lever 14 counterclockwise. And lock lever 14
With this rotation, the engagement between the engagement pin 58 and the engagement protrusion 57 is released, and the lifter elevating lever 13 returns to the position shown by the solid line in FIG.

In this way, when inserting and pulling out the case 4, the disc cam 31 is kept in the standby position by the guiding action by the guide pin 10, and the lifter 15 is moved from the way of case insertion with the rotating action of the lifter elevating lever 13. It can be extremely easily lowered to a playback position where it does not occur.

As mentioned above, the recording medium lifting mechanism of the disk-shaped recording medium reproducing apparatus according to the present invention is such that when the power is connected, the recording medium support in the reproducing apparatus is automatically raised to the standby position above the turntable, and when the power is turned off. By disconnecting the recording medium support, it automatically lowers to the playback position near the turntable. Therefore, if the power cord or the like is accidentally disconnected from the power supply when the recording medium is in the insertion position of the case, for example. In such a case, the recording medium support will automatically lower and the recording medium will be placed on the turntable, so if you leave the recording medium in an unstable state supported only by the recording medium support for a long time, In addition, when a case for storing a recording medium is inserted into a playback device, the recording medium support is mechanically moved to the standby position in connection with the insertion operation of the case. For example, while inserting an empty case into the playback device in order to retrieve the recording medium inside the playback device, the power cord may be stepped on and the connection to the power source may be cut off. Even if the storage medium is removed, the storage medium support will not fall and the storage medium will remain at the specified recovery position. For example, it is possible to reliably prevent inconveniences such as when an inserted disc is not clamped and the disc falls out of the playback device when the case is pulled out, and it is also possible to prevent the case from being inserted for the purpose of recovering the disc. In this case, for example, it is possible to reliably prevent the inconvenience of not being able to collect the recording medium inside the case due to a misalignment between the opening of the case and the position of the recording medium to be collected. When the rear case is pulled out, the lock on the recording medium support is released and the recording medium support is lowered to the playback position, so the lowering operation at this time can activate the incorrect insertion prevention mechanism, etc. .

[Brief explanation of the drawing]

1 and 2 are a schematic perspective view and a schematic longitudinal sectional front view showing the internal structure of an embodiment of a disk-shaped recording medium reproducing device, respectively, and FIGS. 3 to 5 are an embodiment of the recording medium lifting mechanism according to the present invention. FIGS. 6 and 7 are plan views of main parts in different operating states of the example, and are plan views for explaining the operation of the lifting mechanism lock lever when it is unlocked and when it is locked, respectively. DESCRIPTION OF SYMBOLS 1...Playback device, 2...Disk, 3a...Power plug, 4...Case, 9a, 9b...Slider, 10...Guide pin, 10a...Course, 12...
...Lifter lock lever, 15...Lifter, 16...
...Turntable, 33...Gear (some teeth),
34... Lifting motor, 52... Cam groove.

Claims (1)

[Scope of utility model registration request] A disc-shaped recording medium housed in a case is inserted and supported on a recording medium support waiting at a standby position above the turntable, and after only the case is taken out, the recording medium support The recording medium is lowered to the playback position on the table and placed on the turntable to make it ready for playback, and when recovering the recording medium, the recording medium is removed from the playback position along with the recording medium support. In a disk-shaped recording medium playback device configured to be raised to a standby position, an empty case is inserted, and the recording medium is taken out, the recording medium support is raised to the standby position by connecting the device to a power source, and is connected to the power source. In addition to having a structure in which the recording medium support is lowered to the playback position by cutting off the connection, a locking mechanism is provided to lock the recording medium support in the standby position in connection with the operation of inserting the case into the device, and even if the power is not connected while the case is being inserted. A recording medium elevating mechanism in a disk-shaped recording medium reproducing apparatus, which prevents the recording medium support from descending even when the connection of the recording medium is severed.