JPS634264B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording disc reproducing apparatus, and more particularly to a mechanism for mounting a recording disc onto the apparatus.

This type of recording disc is stored in a cartridge because its playback ability decreases when touched by hand.The recording disc can be played back by inserting and removing the cartridge containing the recording disc into a playback device. A method is used in which it remains inside the device. At the second position, which is the insertion position of the recording disk, the recording disk is supported near its center. However, this type of recording disc 1 is made of a flexible material whose main component is vinyl chloride, and there is a risk of permanent deformation when it is stored under stress for a long time, especially at a high temperature of 40°C or higher. There is. This type of recording disk 1 has the limitation that a sufficient reproduction signal cannot be obtained because the signal detector 10 will not respond unless the surface precision of the surface is maintained at several hundred microns or less. Therefore, in order to avoid problems caused by holding the recording disk 1 in the second position for a long time, an electric sequence is adopted in which the recording disk 1 is immediately moved from the second position to the first position after insertion using a driving means such as an electric motor. It has been considered to move from the second position to the first position after several minutes using a timer.

However, since an electric motor or the like is used to move the recording disk from the second position to the first position, when the recording disk is in the second position and the power supply circuit is interrupted due to a power outage, the recording disk may not be in the first position for a long time. 2 position, and there was a risk that the reproduction signal would be adversely affected by deformation of the recording disk.

This invention was made in order to eliminate the disadvantages of the conventional ones as described above, and the driving force is transmitted from the movable body drive device to the engagement movement mechanism in a disconnectable manner, and when disconnected, the driving force is transmitted by the biasing force of the biasing body. Record disk first
It is an object of the present invention to provide a recording disk reproducing device that does not cause problems such as a decrease in the area of the recording disk even if the power is cut off by moving the recording disk to the position shown in FIG.

An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a recording disk conveyor, 2 is a cartridge that stores this recording disk 1, 3 is a cartridge half that is fitted into an opening 2a of this cartridge 2, and 3a is this cartridge half 3.
3b is a hook portion that engages when the cartridge half 3 remains inside the playback device; 4 is a lock portion that acts to prevent the cartridge half 3 from coming out from the playback device; 4 is a hook portion that is engaged with the cartridge half 3 when it is inserted into the playback device; With a translating cartridge guide device,
4a is the right slider, 4b is the left slider, 4c
is the upper beam, and 4d is the lower beam. 5 is a right guide, 6 is a left guide, and when the cartridge 2 is inserted into the playback device (not shown), the upper beam 4c and the lower beam 4d open due to the unevenness difference provided on the right guide 5 and the left guide 6, By the action of claws (not shown) attached to these, the cartridge 2 is inserted in an open state as shown in FIG.

Next, in FIG. 3, 7 is a
8 is a guide rod fixed to the chassis protrusions 7b and 7c, and 9 is a movable body equipped with a signal detector 10. A bearing portion 9a forming a part of this movable body 9 is Above guide rod 8
It is slidably supported. 11 is a roller pivotally supported by the moving body 9, and the chassis protrusion 7
It is rotatable on guide rods 12 fixed to d and 7e. 13 is a movable body driving device for moving the movable body 9 along the guide rod 8;
14 is a rack plate attached to the side surface 9b of the movable body 9, 15 is a rotating rod pivotally supported by brackets 16, 17, and 18, 19 is an arm A fixed to this rotating rod, and 20 is this arm A. In FIG. 3, this roller 20
is in contact with the lower parallel portion 14a of the rack plate 14. Reference numeral 21 denotes an arm B fixed to the rotating rod 15, and a tension spring 22 is hung between the arm B21 and the protrusion 7f of the chassis 7. Reference numeral 23 designates a link plate fixed to the rotating rod 15, which transmits the driving force of the operation of the lower finger 25, which is a part of the clamper device 24 of the recording disk 1. 26 is a rotating pipe pivotally supported by the rotating rod 15, 27 is an arm C fixed to this rotating pipe 26, 28 is a rotating plate,
29 is a link plate pivotally supported by the arm C27 and the rotating plate 28, and 30 is a tension spring hung between the chassis protrusion 7g and the rotating lever 28. Arms 31 and 32 are fixed to the rotating pipe 26, and these arms 31 and 32 are engaged with the pantograph mechanism 33, and the lift plate 34 is raised and lowered by the operation of the rotating pipe 26. 35
An arm D is fixed to the rotating rod 15, and is located at the upper part of the arm 32 so that it comes into contact with the arm 32 when necessary. Reference numeral 36 denotes an elevating body supported by its own weight on the contact surface 34a of the lift plate 34, and the recording disk 1 is supported on the upper surface 36a of this elevating body 36. 37 is a motor attached to the chassis 7 and rotates the turntable 38; 38a is an outer peripheral rib surface of the turntable 38; 39 is a centering tool for the recording disk 1 that is slid on the shaft 37a of the motor 37. be.

FIG. 4 shows the movable body drive device 13, where 40 is a mounting plate attached to the chassis 7, 41 is a housing pivotally supported by a pin 40a set up on the mounting plate 40, and 42 is a mounting plate attached to the chassis 7. The mounting plate 42a is a pin fixed thereto, and the pin 42a is engaged with a long hole 41a provided in the housing 41, and the housing 41 is rotatable around the pin 40a. There is. 41b is a pin installed in the housing 41, and includes a wheel gear 43 and a pinion gear 44.
are fixed coaxially to each other and pivotally supported by the pin 41b. 45 is a bracket attached to the housing 41, 46 is a pin pivotally supported on this, and the worm 47 and pulley 48 are attached to this pin 46.
Fixed. 49 is a motor attached to the housing 41, and this output shaft (not shown)
A belt 51 is hung between the pulley 50 fixed to the pulley 48 and the pulley 48. 52 is an excitation attraction type solenoid fixed to the mounting plate 42, 52a is a drive pin, 52b is a stopper,
Reference numeral 52c denotes a compression spring, and the drive pin 52a is in a positional relationship such that it comes into contact with the contact portion 41c of the housing 41 when necessary. 53 is the above mounting plate 4
2 and the pin 42b and the housing 41
The moment around the pin 40a due to the tension spring 53 is greater than the moment around the pin 40a due to the compression spring 52c.
The loads of the tension spring 53 and the compression spring 52c are selected so that the moment around a is larger.

Further, in FIG. 3, reference numeral 54 denotes a compression spring that is fitted into the guide rod 8 and comes into contact with the chassis protrusion 7b and the bearing portion 9a of the movable body 9 to bias the movable base to the right in the figure. .

Next, the operation will be explained. FIG. 3 shows a state before the cartridge 2 containing the recording disc 1 in FIG. 1 is inserted into the playback device. is in contact with the lower parallel portion 14a of the rack plate 14. The rotation plate 28 is torqued counterclockwise by the action of the tension spring 30, and this action causes the rotation pipe 2
6 in the counterclockwise direction, that is, the lift plate 34 is actuated upward, and this lift plate 3
The height of the elevating body 36 supported by the recording disk 4 is set to a height corresponding to the second position of the recording disk 1.

At such a position, the cartridge 2 containing the recording disk 1 is inserted from the insertion opening 7a of the chassis 7. At this time, as shown in FIG. 2, the cartridge is inserted into the opening 2a in an enlarged state due to the action of the cartridge guide device 4, and the cartridge guide device 4 and the rotating plate 28 are inserted at an intermediate position.
Due to the engagement of the inclined portion 28a, the lift plate 34 and the elevating body 36 supported by the lift plate 34 are lowered.
The above-mentioned insertion operation can be continued without interference between the cartridge 2 and the elevating body 36. When the cartridge 2 reaches the clamp device 24, the recording disk 1 and the cartridge half 3 are held by the clamp device, and the empty cartridge is extracted from the playback device. In the middle of this extraction, the elevating body 36 rises due to the engagement between the cartridge guide device 4 and the inclined portion 28a of the rotating plate 28, and supports the recording disc 1.

Next, the movable body drive device 13 moves rightward in the figure in response to the reproduction operation instruction signal. At this time, the tension spring 22 overcomes the tension spring 30, so that the roller 20 is moved from the rack plate 1 as shown in FIG.
4, the rotary rod 15 rotates clockwise, and the elevating body 36 and the recording disk 1 supported thereon descend, and this recording disk 1 moves to the outer circumferential rib surface 38a of the turntable 38. , that is, when the first position is reached, the mounting operation of the recording disk 1 to the playback device is completed, and the moving body 9 is subsequently moved to the playback position of the recording disk 1 by the operation of the moving body drive device 13. and start the playback operation.

The above explanation of the operation is an explanation of normal normal operation, but in the above explanation, the state before the moving body drive device 13 operates, that is, the recording disk 1 is supported by the elevating body 36 and is in the second position. This section explains the operation when the power is cut off while the device is held in the same position. That is, FIG. 4 shows the state when the power is on, and since the solenoid 52 is an excitation attraction type and is connected to the power supply, when the power is on, the drive pin 52
The drive pin 42b and the abutting portion 41c are separated from each other, and the pinion gear 44 is moved upward by the action of the tension spring 53, so that the pinion gear 44 engages the rack teeth 14c of the rack plate 14. They are bowed. Further, the movable body 9 presses the compression spring 54 in the standby position shown in FIG. If the power is cut off in this state, the solenoid 52
Since the suction force is lost, the contact portion 41c is pressed downward by the compression spring 52c. At this time, if the torque by the compression spring 52c is set to be larger than the torque around the pin 40a by the tension spring 53, the housing 41 will rotate clockwise around the pin 40a by the action of the compression spring 52c. The pinion gear 44 has lock teeth 14c.
It's easier to understand. At this time, the movable body 9 moves to the right in FIG. 3 due to the pressing action of the compression spring 54, and the engagement between the rack plate 14 and the rotating rod 15 causes the elevating body 36 and the recording disk 1 supported thereon. descends and reaches the first position.

As described above, according to the present invention, the driving force is transmitted from the movable body drive device to the engagement movement mechanism in a manner that it can be interrupted, and when the driving force is interrupted, the recording disk is moved to the first position by the urging force of the urging member. Since the structure is equipped with a drive cutoff mechanism for moving the recording disk, even if the power is cut off when the recording disk is in a position other than the first position, for example, the second position, it can be quickly moved to the first position, and the recording disk can be moved to the first position. This has the effect of maintaining good dimensional accuracy.

[Brief explanation of the drawing]

1 and 2 are views common to a conventional recording disc reproducing apparatus and an embodiment of the present invention, and FIG. 3 is a diagram showing a recording disc reproducing apparatus according to an embodiment of the present invention. 4 is a detailed view taken in the direction of the arrows in FIG. 3, and FIG. 5 is a detailed view taken in the direction of the arrows in FIG. 3 to show the operation. In the figure, 1 is a recording disk, 2 is a cartridge, 9 is a movable body, 10 is a signal detector, 13 is a movable body drive device, 14 is a rack plate, 15 is a rotating rod of the engagement movement mechanism, and 26 is an engagement A rotation pipe of the moving mechanism, 36 an elevating body of the engagement moving mechanism, 44 a pinion gear of the drive cutoff mechanism, 52 a solenoid of the drive cutoff mechanism, and 54 a biasing body which is a compression spring.
In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A recording disk stored in a cartridge is inserted by a cartridge guide device and is installed at a second position of the recording disk supported by an elevating body and at a position substantially coaxial with and spaced apart from this second position. a turntable, a first position of the recording disc at which the recording disc is supported by the turntable, and a signal detector rotatably supported at the first position and detecting a signal from the recording disc. a moving body driving device that moves the moving body in the radial direction of the recording disk; and a moving body driving device that moves the moving body in the radial direction of the recording disk, and when the moving body moves between an outermost recording position of the recording disk and a standby position further in the outer circumferential direction. an engagement movement mechanism that engages with the movable body and moves the elevating body between a first position and a second position; and an engagement movement mechanism that is provided on the movable body and moves the movable body from the standby position to the A biasing body that biases toward the outermost recording position, and a drive cutoff mechanism that is provided in the movable body drive device and that interrupts the driving force of the movable body by the movable body drive device when necessary, When the body is in the standby position and the drive cutoff mechanism does not operate, the movable body drive device moves the movable body in the direction of the outermost recording position, or when the drive cutoff mechanism needs to operate, the biasing body moves the movable body in the direction of the outermost recording position. The elevating body is moved from the second position to the first position by engaging with the movement of the movable body, and the recording disk supported by the elevating body is supported on the turntable. A recording disk reproducing device characterized in that: