JPH02118955A - Disk loading controller - Google Patents

Abstract

PURPOSE:To position two kinds of disks with different outer diameter to a prescribed position by providing a central sensor near the center in the horizontal direction around a disk loading port, left/right sensors to the left and right side of the central sensor and further left/right outside sensors to the outside of the left/right sides. CONSTITUTION:When a large diameter disk D1 is loaded to a disk loading port 12, the central sensor 41 is operated and the loading front part of the large diameter disk D1 is clipped by a carrier roll 15 and an upper guide plate just after an opened door 13. A control section allows the carrier motor 14 in the disk retracting direction to retract the carrier roll 15 and then left/right outside sensors 44, 45 are both in operation. In the case of a small diameter disk, when any of a central sensor 41, a left sensor 42 and a right sensor 43 is operated, the disk retraction driving is outputted. Thus, the disk with different outer diameter is subjected to position control at a prescribed position.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention distinguishes two types of disks with different outer diameters,
Each relates to a disc loading control device necessary for loading a disc to a predetermined position above a turntable.

(Prior Art) The gist of a conventional disk positioning structure will be explained with reference to the perspective view of FIG. 11.

When the disc 1 is pulled in the arrow direction by a disc transport roller (not shown) and reaches above the turntable (not shown), the light from the light emitting element 2 is blocked by the front part of the disc 1 and received as shown in the above figure. The disk transport motor stops, and the front edge of the disk 1 abuts the left and right positioning pins 4.5 (fixed to the chassis, not shown), positioning the disk 1 in a predetermined position. It has a structure that allows

(Problem to be solved by the invention) In this structure, the outer diameter of the disk is one type (for example, 12cm).
n1 disc), and can only be used with other types of discs (
For example, 8 (7) disks) cannot be shared.

Moreover, in order to detect that the disc 1 has been completely ejected from the disc reproducing apparatus (that the disc has reached a position where it is substantially separated from the disc transport roller), another sensor must be provided.

This invention was proposed in order to solve these problems in the conventional disks, and it is possible to distinguish two types of disks with different outer diameters and load them into predetermined positions, and also to control the ejection operation. The purpose of the present invention is to provide a disk loading control device with the following features.

(Means for Solving the Problems) A disc loading device of the present invention includes a transport mechanism for transporting a large-diameter disc or a small-diameter disc between a disc insertion slot and a position above the turntable, and a transport mechanism for transporting the disc above the turntable. In a disc playback device having a positioning mechanism for positioning the disc and a flange mechanism for flanging the disc on the turntable, a central sensor that operates when a large-diameter disc or a small-diameter disc is in the disc insertion slot; At least one of the left and right sensors operates when the disk is in the inserted position and both are inactive when the turntable is above the turntable, and both operate when the large-diameter disk is in the mid-transfer position, above the turntable. The transfer mechanism is driven in the disk retraction direction by the operation of the left and right outer sensors, which become inactive when the sensor is in the position, and one of the center, left, and right sensors, and both the left and right outer sensors operate. to control the positioning mechanism to switch to the position of the large diameter disk, stop the transfer mechanism by making both the left sensor and right sensor inactive, or both the left and right outer sensors inactive, and eject the disk by operating the ejection key. A control section for controlling drive in the direction is provided.

The positioning mechanism is for both large diameter discs and small diameter discs.
A structure may be adopted in which a common positioning pin is moved to each position.

Furthermore, the positioning mechanism for large-diameter disks has a fixed-side positioning pin fixed to the chassis, and for small-diameter disks has a positioning pin that protrudes forward in the insertion direction of the fixed-side positioning pin. Can be done.

(Function) When a large-diameter disk or a small-diameter disk is inserted into the disk insertion slot, the central sensor operates for the large-diameter disk, and at least one of the left sensor, right sensor, or center sensor operates for the small-diameter disk, thereby controlling the disk. The section drives the transfer mechanism in the disk retraction direction to transport the disk upwardly of the turntable.

In the case of a large-diameter disk, both the left and right outer sensors operate, so the control section switches the positioning mechanism to the position of the large-diameter disk, and in the case of a small-diameter disk, the left and right outer sensors operate. Since either one or both of them are inoperative, the positioning mechanism is at the position of the small diameter disk.

When a large-diameter disc or a small-diameter disc reaches the upper position of the turntable, both the left and right outer sensors become inactive in the case of a large-diameter disc, and both the left and right sensors become inactive in the case of a small-diameter disc, so the controller moves the disc. The mechanism stops, and the positioning mechanism moves both the large diameter disc and the small diameter disc to a position above the turntable.

The transfer mechanism is driven in the disc ejection direction by operating the eject key, and when the disc is ejected to the disc insertion slot, both the left and right outer sensors become inactive for large-diameter discs, and the left and right sensors become inactive for small-diameter discs. Is the control part in operation? ``i Stop the transport mechanism.

The positioning mechanism may have a structure in which a common positioning pin moves for both large-diameter disks and small-diameter disks,
Furthermore, the fixed side positioning pins identified on the chassis can be used for large diameter disks, and the large diameter disk and small diameter disk can be accurately positioned, respectively.

(Example) Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows a state in which a large-diameter disc is used, and FIG. 2 shows a state in which a small-diameter disc is used, and is a plan view of the main part of the disc reproducing apparatus, and FIG. 3 is a front view of the main part of FIG. 1.

The disk insertion slot 12 of the chassis 11 is provided with a gear 9a 13, and a transfer mechanism consisting of a transfer motor 4, a transfer roller 5, and a transfer gear train 16 (transmits the rotation of the transfer motor 4 to the transfer roller 5 at a reduced speed). Reference numeral 17 is mounted on a loading chassis 18, and the loading chassis 18 is connected to a turntable motor 9 and a turntable 20, an optical pickup 21, and a pickup feeding mechanism 22, which are provided on the bottom plate of the chassis 1 (not shown). , is configured to be able to be raised and lowered by a lifting mechanism 55 (not shown) (which engages and disengages from the transfer gear train 16).

Clamp head 2 located above the turntable 20
The clamp plate 24 having a diameter of 3 is pivoted to the chassis 11 by a fulcrum shaft 25.25, and is lowered in conjunction with the lowering movement of the lifting mechanism 55. In the lowered position, the clamp head 923 is attached to a large diameter disc D or a small diameter disc D. A clamp mechanism 26 configured to press the disc D2 against the turntable 20 by the force of a spring is provided.

A positioning mechanism 27 for accurately positioning the large diameter disc D or the small diameter disc D2 transferred above the turntable 20 above the turntable 20.
rotates the left and right positioning levers 30.31 which are pivotally supported by fulcrum pins 28, 29, the switching lever 33 which is pivotally mounted by the fulcrum pin 32, and the switching lever 33 on the clamp plate 24. Solenoid 34 and positioning lever 3
Positioning pins 35, 36 provided at 0°31. It is constituted by a switching pin 37 provided on the switching lever 1-33, and retaining holes 38 and 39 provided on the respective positioning levers 30 and 31 to engage with the switching pin 37.

When the actuator 34a of the solenoid 34 is attracted, the connecting body 40 moves the switching lever 33 to the clockwise extreme position as shown in FIG. Turn the positioning levers 31 to the left and hold them at the extreme positions, respectively, and the positioning pins 35 and 36 are at their most open positions to the left and right, and the leading edge of the insertion is placed in contact with these positioning pins 35 and 36. Large diameter disc D in contact
1 is precisely positioned above the turntable 20.

In the state shown in FIG. 2 in which the actuator 34a is not sucked, the connecting body 4
0 holds the switching lever 33 in the counterclockwise extreme position, the switching pin 37 holds the left positioning lever 30 in the counterclockwise extreme position, and the right B11J positioning lever 31 in the clockwise extreme position, respectively. The positioning pins 35 and 36 are located closest to each other toward the center, and these positioning pins 3
5. Small diameter disk D2 with its insertion front edge in contact with 36,
It is accurately positioned above the turntable 20.

The control unit 56, which is composed of a microcomputer that controls the operations of the transfer motor 14, the solenoid 34, and the lifting/lowering ht mechanism 55, is all of an optical type and is connected to a central sensor 41, which will be described below.
, the left sensor 42, the right sensor 43, and the left and right outer sensors 44, 45 output commands -i, t +, -> for the detection operations.

That is, the center sensor 41 is placed near the center in the left and right direction near the disk insertion slot 12, the left sensor 42 and the right sensor 43 are placed on the left and right sides of the center sensor 41, and the left sensor 42 and the right sensor 43 are placed further left and right outside of the left sensor 42 and the right sensor 43, respectively. , left and right outer sensors 44 and 4
5 are provided respectively.

The specific structure of each of the above sensors is shown in A-A in Fig. 3 and Fig. 1.
This is shown in FIG. 4, which is a sectional view taken along line A.

A light emitting element E1 such as a light emitting diode is attached to the lower substrate 46 attached to the chassis 11, and a light receiving element E2 such as a phototransnoster is attached to the upper substrate 17, respectively.
For example, as in the case of the outer sensor 45, the light from the light-emitting element E is directly received by the light-receiving element E2, and in a position where direct light emission and reception is not possible due to an obstacle, the light from the light-emitting element E1, for example, in the case of the central sensor 41, is received by the light-receiving element E2. A prism 48 is attached to the lower substrate 46 to bend the light and receive the light on the light receiving element E2.When the light from the light emitting element E is blocked by the large diameter disk D or the small diameter disk D2, the light is received by the light emitting element E2. This is the structure in which the sensor becomes operational.

The left and right spacing between the left and right side plates 11a and llb of the Sharn 11 is as follows:
The outer diameter of the large-diameter disk D1 is slightly larger than that of the large-diameter disk D1, and the movement of the large-diameter disk D1 in the left-right direction is restricted.

Therefore, when the large-diameter disk D1 is inserted into the disk insertion slot 12, the central sensor 41 operates smoothly as shown in FIG.
The insertion front portion of the large-diameter disk D1 is sandwiched from above and below by the transfer roller 15 and the upper guide plate 49 immediately behind the opened door 13.

Based on the operation of the central sensor 41, the controller 56 causes the transfer motor 14 to drive the transfer roller 15 in the disk retraction direction, and when the large diameter disk D reaches the position indicated by the two-dot chain line in FIG. 44.45 work together.

In the case of the small-diameter disk D2, when the insertion position is near the center in the left-right direction, the center sensor 41 operates first, when the insertion position is positively biased, the left sensor 42 operates, and when the insertion position is biased to the right, the right sensor 43 operates. , respectively operate (FIG. 8), so when any one of the center sensor 41, left sensor 42, and right sensor 43 operates, the disk retraction drive by the control unit 56 is output.

The operation of each sensor and the output command of the control unit 56 based on the operation will be explained below.

When the small-diameter disk D2 starts to be transferred by the transfer roller 15, the left sensor 42 and the right sensor 43 operate (FIG. 2), the left sensor 42 and the left outer sensor 44 operate, and the right sensor 43 operates. 13 and right outer sensor 45
(FIG. 8), and for the large diameter disk D1 where the left and right outer sensors 44 and 45 operate together,
Can be distinguished.

Therefore, when the left and right outer sensors 44, 45 operate together, the actuator 34a of the solenoid 34 is switched to the suction position (Figs. 1 and 7), and when it is not in position 5, the actuator 34a
The control unit 56 controls the solenoid 34 so that the solenoid 34 is held in the extended position (FIGS. 2 and 8).

As the transfer operation progresses to near the top of the turntable 20, the left and right positioning pins y35 and 36 correct the leftward or rightward deviation of both the large-diameter disk D1 and the small-diameter disk D2, and align them on the center line in the left-right direction. Therefore, when a large-diameter disc D1 is used, both the left and right outer sensors 44 and 45 are inoperative (solid lines in Figure 1), and when a small-diameter disc D2 is used, both the left sensor 42 and the right sensor 43 are inoperative (the second (solid line in the diagram), the controller 56 controls the transfer motor 1
to stop.

At this time, both the large diameter disc D4 and the small diameter disc D2 are accurately positioned above the turntable 20 by the left and right positioning pins 35 and 36.

Next, the control unit 56 instructs the lifting mechanism 55 to lower the loading chassis 8, and the large diameter disc D1 or the small diameter disc D2 is transferred from the top of the loading chassis 18 to the turntable 20, and at the same time, In conjunction with this lowering movement of the lifting mechanism 55, the clamp plate 2
4 is rotated downward, clamping is performed by the crank hemlock 23, and the downward movement is stopped by the operation of a switch (not shown).

The turntable motor 19 and the pickup feed mechanism 22 are operated by the performance key P to perform reproduction. When the ejection key E is operated, the elevating mechanism 55 moves upward, and the loading chassis 18 and the clamp plate 24 rise to return the large-diameter disk D1 or the small-diameter disk D2 to the loading chassis 18.

When the large-diameter disk D1 or the small-diameter disk D2 on the loading chassis 18 returns to the same height as the transfer roller 15,
A switch (not shown) operates and the control unit 40 controls the lifting mechanism 55.
Then, the transfer roller 15 is driven in the disk ejection direction.

During the ejection operation, both the left and right outer sensors 44 and 45 operate on the large-diameter disk D1, and the left sensor 42 and the right sensor 43 on the small-diameter disk D2 are both in operation.

Near the end of the ejection operation, the large-diameter disk D1 comes off the left and right outer sensors 4.4 and 45, and these sensors 44
, 45 become inoperative, and the small diameter disk D2 comes off from the left sensor 42 and right sensor 43, and these sensors 42.4
3 are both inactive, so the transfer motor 14 is stopped by a command from the control section 56.

The control unit 56 commands the transfer motor 4 and the positioning mechanism 27 to perform the control operations based on the operating states of the central sensor 41, left sensor 42, right sensor 43, and left and right outer sensors 44, 45. D1 and small diameter disk D2 are further shown together in FIG.

In this way, by arranging a series of sensors such as the central sensor 41 in the disk insertion slot 12, it is possible to distinguish between the large-diameter disk D1 and the small-diameter disk D2 with a small number of sensors, thereby switching the positioning mechanism 27. It is now possible to play two types of discs with different outer diameters, and furthermore, loading, unloading, and clamping operations are automatically controlled.

Since the central sensor 41 and the like are arranged in series, the sensor board and circuit are short sleeves.

By using these sensors and the control unit 56, reloading can be easily realized for safety when a certain period of time has elapsed after the ejection operation.

As another embodiment of the positioning mechanism 50, FIGS. 9 and 10 show plan views of the main parts of the large-diameter disk D1 and the small-diameter disk D2 in use, respectively.

In the same figure, the same members as those of the positioning mechanism 27 are given the same reference numerals, and their explanations are omitted.

Positioning pins 5 provided on positioning levers 30 and 31
1. ! : 52 is positioned by abutting against a small-diameter disk D2 on the turntable 20, and by abutting against a fixed-side positioning pin 53.54 fixed to the chassis 11 behind the positioning pin 51.52 and the large-diameter disk D1. Similar to the positioning mechanism 27, the switching operation is performed by moving the actuator 34a of the solenoid 34 in and out based on a command from the control section 56.

(Effects of the Invention) Since the disk loading control device according to the present invention is configured as described above, it has the following effects.

(1) The operation of a series of sensors such as the center sensor, left sensor, etc. and the control section makes it possible to automatically discriminate between large-diameter disks and small-diameter disks and to switch the positioning mechanism.

(2) The oscillation start and stop control of the transfer mechanism for loading and unloading, and the clamping operation are also automatically performed.

(3) The above control could be automated using a small number of sensors.

[Brief explanation of drawings]

1 to 10 show embodiments of the present invention, and FIG. 1, FIG. 2, FIG. 7, and FIG. The figure is a front view of Fig. 1, Fig. 4 is a sectional view taken along line A-A of Fig. 1, Fig. 5 is a control circuit diagram, Fig. 6 is an explanatory diagram of control operation, and Figs. 9 and 10 are positioning diagrams. FIG. 11 is a plan view of the main part of each disk in use in other embodiments of the mechanism, and FIG. 11 is a perspective view of the main part of the conventional mechanism. 11... Chassis, 12... Disk insertion slot, 13
... Door, 14... Transfer motor, 15... Transfer roller, 16... Transfer gear train, 17... Transfer mechanism, 1
8... Loading chassis, 19... Turntable motor, 20... Turntable, 21... Optical pickup 122... Pickup feeding mechanism, 23...
・Clamp hesode, 24...Clamp plate, 25
...Fulcrum shaft, 26...Flange mechanism, 27.50.
...Positioning mechanism, 28.29.32...Fulcrum pin,
30.31... Positioning lever 33... Switching lever 34... Solenoid, 34a... Operator, 35
．． 36, 51.52... Positioning pin, 37... Switching pin, 38.39... Engagement hole, 40... Connecting body,
41...Center sensor, 42...Left sensor, 43...
・Right sensor, 44.45...Outside sensor, 46...
Lower substrate, 47... Upper substrate, 48... Prism,
53.54...Fixed side positioning pin, 55...Elevating mechanism, 56...Control unit, Dl...Large diameter disk, D
...Small diameter disk, E ...Light emitting element, E2...
- Light receiving element, P... Performance key E... Ejection key. Figure 11 Patent applicant Kenwood Co., Ltd. Agent Masaaki Ichi
Nobuo Sunako Figure 7

Claims (3)

[Claims] (1) A transfer mechanism for transferring a large-diameter disk or a small-diameter disk between the disk insertion slot and the upper position of the turntable, a positioning mechanism for positioning the disk above the turntable, and a clamping mechanism for clamping the disk to the turntable. A central sensor that operates when a large-diameter disc or a small-diameter disc is in the disc insertion slot, and at least one that operates when a small-diameter disc is in the disc insertion position and that rotates The left and right sensors are both inactive when the table is above the table, and the left and right outer sensors are both active when the large-diameter disk is in the middle of transport, but both are inactive when the turntable is above the turntable. , center sensor, left sensor,
The movement of the transfer mechanism is controlled in the disk retraction direction by the operation of any one of the right sensors, and the positioning mechanism is switched to the position of the large-diameter disk by the operation of both the left and right outer sensors. What is claimed is: 1. A disk loading control device comprising: a control unit that controls the transfer mechanism to stop by operating or by not operating both left and right outer sensors, and controls driving the transfer mechanism in the disk ejection direction by operating an ejection key. (2) The disk loading control device according to claim 1, wherein the positioning mechanism has a structure in which a common positioning pin is moved to the respective positions for both large-diameter disks and small-diameter disks. (3) The positioning mechanism for large-diameter disks has a fixed-side locating pin fixed to the chassis, and for small-diameter disks has a locating pin that protrudes forward in the insertion direction of the fixed-side locating pin. The disk loading control device according to claim 1, characterized in that: