JP2644170B2 - Disc loading control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk loading control device for loading two types of disks having different outer diameters at predetermined positions above a turntable.

[0002]

2. Description of the Related Art A gist of a conventional disk positioning structure will be described with reference to a perspective view of FIG. When the disk 1 is pulled in the direction of the arrow by a disk transport roller (not shown) and reaches above a turntable (not shown), the light of the light emitting element 2 is blocked by the front portion of the disk 1 as shown in the same figure. The disk does not reach the light receiving element 3 and the disk transport motor stops, whereby the front edge of the disk 1 comes into contact with the left and right positioning pins 4 and 5 (fixed to a chassis (not shown)) to hold the disk 1 in a predetermined position. It is a structure for positioning. In this structure, only one type of disk (for example, a 12 cm disk) can be used, but it cannot be shared with another type of disk (for example, an 8 cm disk). In addition, another sensor must be provided in order to detect that the disc 1 has been completely ejected from the disc reproducing apparatus (that the disc 1 has reached a position substantially apart from the disc transfer roller). Further, after the LP and EP boards, which are two kinds of records having different outer diameters, have been transferred to the turntable by the record pull-in motor, a detection operation by a size determination sensor or a non-detection operation is performed by the size detection sensor. Japanese Patent Application Laid-Open No. 53-68204 discloses a guide apparatus for a recording disk of an auto player capable of playing records of two different sizes by judging the size.

[0003]

The above-mentioned JP-A-53-68
In the guide device of No. 204, since the size of the record is determined after the transfer to the turntable by the record retraction motor is completed, the stop of the record retraction motor when the transfer to the turntable is completed is stopped by the record of the record. This operation is performed when any of a large number of sensors for detecting the end of retraction arranged to detect the trailing edge in the retraction direction is not detected. As a result, the appearance of detection and non-detection of these many sensors differs between the large-sized LP board and the small-sized EP board, and furthermore, as the insertion position shifts in the left-right direction with respect to the center of the auto player, furthermore, It will be different. That is, the sensor on the off side that is not detected even before the end of the retraction is the left sensor or the right sensor, and so is different each time. In other words, it is not possible to determine whether the sensor in the non-detection state is a malfunction of the sensor or a misalignment of a large or small disk. Therefore, it is difficult to perform a logical configuration of the pull-in motor control using such a large number of sensors. The present invention has been proposed in order to solve these problems in the prior art. Even when the insertion position of, for example, a small-diameter disk of two types of disks having different outer diameters is shifted left and right, the disk size can be determined. It is an object of the present invention to provide a disk loading control device in which the control is correctly performed and the control structure of the disk drawing motor is simplified.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises a transfer mechanism for transferring a large-diameter disk or a small-diameter disk between a disk insertion slot and a position above a turntable; In a disc reproducing apparatus having a positioning mechanism for positioning the disc above the reproduction position, and a clamp mechanism for clamping the disc to the turntable, a center sensor and a left and right An outer sensor and a left sensor arranged at a position where a small-diameter disk can be detected even at a position where the small-diameter disk is shifted left and right at the insertion position,
A right sensor and a control unit for starting the driving in the retraction direction by the transfer mechanism, stopping the driving in the retraction direction, and discriminating the type of the large-diameter disk and the small-diameter disk; The detection is performed by any one or more of the sensors, the drive stop is performed by the non-operation of the left and right outer sensors or the left and right sensors, and the type determination is performed by the presence or absence of the operation of the left and right outer sensors. A disk loading control device comprising a control unit.

[0005]

When the large-diameter disk is at the insertion position, the center sensor detects this. When the small-diameter disk is at the insertion position and at the center, the center sensor performs detection operation. At least one of the sensor, the left sensor, and the right sensor performs a detection operation, and the control unit controls the drive of the transfer mechanism in the disk retraction direction by the detection operation. At the time of driving in the retracting direction, when both the left and right outer sensors operate, it is determined that the disc is a large-diameter disc, and when at least one of the left and right outer sensors is not operating, it is discriminated that the disc is a small-diameter disc. Then, when both the left and right outer sensors become inactive in the large-diameter disk, and when both the left sensor and the right sensor become inactive in the small-diameter disk,
The driving in the retracting direction is stopped. As described above, one of the left and right outer sensors performs the detecting operation during the driving in the retracting direction, so that the disk is immediately a small-diameter disk in the driving in the retracting direction, and the small-diameter disk is inserted into one of the left and right sides. As a result, it is possible to quickly and accurately determine whether the non-detection state of the off-side sensor is a malfunction of the sensor or a misalignment of the disk, and the logical configuration of the pull-in motor control becomes extremely simple.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a main part of a disc reproducing apparatus, and FIG. 2 is a plan view of a main part of FIG. is there.
A door 13 is provided in a disk insertion opening 12 of the chassis 11, and a transfer motor 14, a transfer roller 15, and a transfer gear train 1 are provided.
A transfer mechanism 17 comprising a transfer motor 6 (to transfer the rotation of the transfer motor 14 to the transfer roller 15 at a reduced speed) is mounted on a loading chassis 18 and a bottom plate of the chassis 11 (not shown). Turntable 19 and turntable 2 provided in
0, optical pickup 21 and pickup feed mechanism 2
On the other hand, the loading chassis 18 is configured to be able to move up and down by an elevating mechanism 55 (which is disengaged from the transfer gear train 16) (not shown).

A clamp plate 24 having a clamp head 23 located above the turntable 20 is pivotally supported on the chassis 11 by fulcrum shafts 25, 25 so that the lifting mechanism 55 can be lowered. conjunction with lowered, the clamping head 23 in the lowered position, the data of the large-diameter disk D ₁ or the small-diameter disk D ₂ - integrators - clamping mechanism 26 of the structure is pressed against the force of the spring to the table 20 is provided. Data - integrators - the large-diameter disk D ₁ or the small-diameter disk D ₂ which has been transported to the vicinity of the upper table 20, exactly motor - integrators - Bull 20
A positioning mechanism 27 for positioning above the plate is provided on the clamp plate 24 with left and right positioning levers 30, 31 pivotally supported by fulcrum pins 28, 29 and a switching lever pivotally supported by a fulcrum pin 32. -33, a solenoid 34 for rotating the switching lever 33, positioning pins 35, 36 provided on the positioning levers 30,31, and a switching lever 33.
And engagement holes 38, 39 provided in the respective positioning levers 30, 31 to engage with the switching pin 37.

When the actuator 34a of the solenoid 34 is sucked, the connecting member 40 moves the switching lever 33 to the extreme clockwise position as shown in FIG. 1, and the switching pin 37 rotates clockwise through the left positioning lever 30. At the extreme position, the right positioning lever
31 is held at the extreme counterclockwise position, the left positioning pin 35 is at the leftmost position, the right positioning pin 36 is at the rightmost position, and the positioning pins 3 at this time.
By inserting the front edge of the large-diameter disk D ₁ is abut to 5,36, the large-diameter disk D ₁ is data - integrators - are to be precisely positioned over the table 20. In the drawing in which the actuator 34a of the solenoid 34 is not sucked, the connecting body 4
0 moves the switching lever 33 to the extreme left position, and the switching pin 37 holds the left positioning lever 30 at the extreme left position and the right positioning lever 30 at the extreme right position. However, the left positioning pin 35 and the right positioning pin 36 are located at the most moved positions toward the center in the left-right direction.
Inserting the front edge of the small-diameter disk D ₂ is by being contact, the small-diameter disk D ₂ are data in - integrators - are to be precisely positioned over the table 20.

A control unit 56 composed of a microcomputer for controlling the operation of the transfer motor 14, the solenoid 34, and the elevating mechanism 55 is of an optical type and includes a central sensor 41, a left sensor 42, and a right A command is output based on the detection operation of the sensor 43 and the left and right outer sensors 44 and 45. That is, the center sensor 41 is provided near the center in the left-right direction near the disk insertion slot 12, and the left sensor 42 and the right sensor 43 are provided on the left and right sides of the center sensor 41, respectively.
Left and right outer sensors 45 and 46 are further provided on the left and right outer sides of the right sensor 43, respectively.

The specific structure of each of the above sensors is shown in FIG. 3 and FIG. 4 which is a sectional view taken along line AA of FIG. Chassis 11
A lower substrate 46 which is mounted on the light-emitting diode - the such light-emitting elements E ₁ de, also a such light receiving element E ₂ of the phototransistor on the upper substrate 47, respectively mounted, for example in the case of the outer sensor 45 emitting element E ₁ is directly received by the light receiving element E ₂ , whereas the light cannot be directly projected or received due to an obstacle, for example, the light of the light emitting element E ₁ is refracted as in the central sensor 41. a prism 48 for receiving the light-receiving element E ₂ Te, is attached to the lower substrate 46. The light emitting element E _{1 is provided} by the large-diameter disk D ₁ or the small-diameter disk D ₂ .
When the light is blocked, not received by the light receiving element E _2, thereby the sensor is a structure that an operating state. Shar
Right and left side plates 11a, right and left distance 11b of sheet 11 is formed to such an extent slightly greater than the outer diameter of the large-diameter disk D _1,
Lateral movement of the large-diameter disk D ₁ is restricted.

Accordingly, when inserting a big disc D ₁ to the disc insertion opening 12, the central sensor 41 is first an operational state as in FIG. 7, the insertion front of the large-diameter disk D ₁ is transported Russia - and La 15 It is sandwiched from above and below by an upper guide plate 49 immediately after the opened door 13. Based on the operation of the central sensor 41, the transfer mode by the control unit 56 - the upper position of the table 22 - the transfer data 14 in the disc retraction direction B - by driving the La 15 large diameter disk D ₁ 1 deterministic - integrators When it reaches, both the left and right outer sensors 45 and 46 are activated. For small-diameter disk D _2, when the insertion position is near the horizontal center position, first center sensor 41 operates,
If the insertion position is biased to the left, the left sensor 42 is in the operating state (FIG. 8) if the insertion position is biased to the right. When any one of the right sensor 43 operates, the controller 56 outputs a disc pull-in drive command to the transfer motor 14.

Hereinafter, the operation of each sensor and the output command of the control unit 56 based on the operation will be described. Transferring the small-diameter disk D ₂ b - when the La 15 starts to be transported to the disc retraction direction, the outer sensor 44, 45 in the case (left and right and left sensor 42 and right sensor 43 is operated as shown in FIG. 2 are both inoperative 8), when the left sensor 42 and the left outer sensor 44 operate as shown in FIG. 8 (the right outer sensor 45 does not operate), and when the right sensor 43 and the right outer sensor 45 operate. (The left outer sensor 44 is not operating). In contrast, when the large-diameter disk D ₁ starts to be transported to the disc pull direction, as shown in FIG. 1, the left outer sensor 4
4 and the right outer sensor 45 operate. These, when the left and right outer sensor 44, 45 is operated together it is determined that the large-diameter disk D _1, at least one of the left and right outer sensor 44, 45 in the case of non-operation is the small-diameter disk D ₂ Is determined. Accordingly, when both the left and right outer sensors 44 and 45 are operated, the actuator 34a is switched to the suction position (FIGS. 1 and 7), and when at least one of the left and right outer sensors 44 and 45 is not operated. The controller 56 controls the solenoid 34 so that the actuator 34a is set to the projecting position (FIGS. 2 and 8).

[0013] data in the transfer operation is progressing - integrators - When near the upper table 20, the large-diameter disk D ₁ by the left and right positioning pins 35 and 36, both the small-diameter disk D ₂ is corrected deviation in the lateral direction coincides with the horizontal direction centerline Te, when the large-diameter disk D ₁ becomes the left and right outer sensor 44, 45 are both inoperative, the left sensor 4 when the small-diameter disk D ₂
2 and the right sensor 43 are both inoperative, so that the controller 56
Stops the transfer motor 14. At this time, the large-diameter disk D ₁ and the small-diameter disk D ₂ are accurately positioned above the turntable 20 (above the reproduction position) by the left and right positioning pins 35 and 36.

Subsequently, the control unit 56 instructs the elevating mechanism 55 to perform a lowering operation to move the loading chassis 18 downward,
B - loading Sha - sheet 18 on Karata - integrators - the large-diameter disk D ₁ or the small-diameter disk D ₂ is transferred to the table 20. The clamp plate 24 interlocks with the lowering operation of the elevating mechanism 55.
Is rotated downward to clamp the disk by the clamp head 23, and the lowering operation is stopped by a switch operation (not shown). The turntable motor 19 and the pickup feed mechanism 22 are operated by the performance key P, and the reproduction is performed. When playback discharge key -E is operated over, the elevating mechanism 55 is operated increases, Russia - loading Sha - sheet 18 and clamp pre - DOO 24 large-diameter disk D ₁ or the small-diameter disk D ₂ to increase the It is returned to the loading chassis 18. Large-diameter disk D ₁ on loading chassis 18
Or small-diameter disk D ₂ is transferred B - Returning to La 15 the same height as, the control unit 56 not shown switch is operated stops the lifting mechanism 55, followed by transfer Russia - La 15 disk ejection direction Drive.

[0015] During the discharge operation, the left and right outer sensor 44, 45 in the large-diameter disk D ₁ are both operated, the small-diameter disk D
_{In 2} , both the left sensor 42 and the right sensor 43 are operating. The discharge operation terminates near, these outer sensors 44, 45 large-diameter disk D ₁ is disengaged from the left and right outer sensor 44 and 45 are both inoperative, the small-diameter disk D ₂
However, since the left sensor 42 and the right sensor 43 are disengaged from the left sensor 42 and the right sensor 43, both the left sensor 42 and the right sensor 43 do not operate, so that the transfer motor 14 is stopped by a command from the control unit 56.

The large-diameter disk D ₁ or the small-diameter disk D ₂
The control unit 56 instructs the transfer motor 14 and the positioning mechanism 27 to perform the control operation based on the operation states of the center sensor 41, the left sensor 42, the right sensor 43, and the left and right outer sensors 44 and 45 in accordance with the respective conditions. , FIG. That is, the detection operation of this central sensor 41 when the large-diameter disk D ₁ is in the insertion position, the small-diameter disk D
_{When 2} is at the center at the insertion position, the center sensor 41 performs a detection operation, and when it is shifted left and right at the insertion position, at least one of the center sensor 41, the left sensor 42, and the right sensor 43 performs the detection operation, and The control unit 56 controls the drive of the transfer mechanism in the disk retracting direction by the detection operation. During such a retraction direction driving, by one of the left and right outer sensor 44, 45 detects operation, and it is immediately small-diameter disk D during retraction direction drive, the small-diameter disk D ₂ is the offset to the left and right insertion since been it is seen, a non-detection state of the out-side sensor, whether a malfunction of the sensor, whether the deviations insertion of the small-diameter disk D _2, exactly be determined early, the logical structure of the retracting motor control Becomes extremely simple. The center sensor 41, the left sensor 42, the right sensor 4
The large-diameter disk D ₁ can be obtained with a small number of sensors by arranging a series of sensors such as 3 in the disk insertion port 12.
Able to discriminate the small-diameter disk D _2, thereby enables two different disc playback external shape by switching the positioning mechanism 27, and the loading operation, unloading operation, also the clamping operation, become possible that the . Since the sensors such as the center sensor 41, the left sensor 42, and the right sensor 43 are arranged in series in the disc insertion slot 12, the sensor substrate and its circuit have a simple structure.

FIG. 9 shows another embodiment of the positioning mechanism 50.
And Figure 10, showing a fragmentary plan view of the respective usage state of the large-diameter disk D ₁ and a small-diameter disk D _2. In the drawing, the same members as those of the positioning mechanism 27 are denoted by the same reference numerals, and the description of the structure is omitted. Positioning lever-3
The positioning pins 51 and 52 provided on the 0 and 31 are
The large-diameter disk D ₁ contacts the small-diameter disk D ₂ on the table 20, and the large-diameter disk D ₁
Fixed-side positioning pins 53 and 54 fixed to the shell 11
As in the case of the above-described positioning mechanism 27, the switching operation is performed by the operation of the actuator 34a of the solenoid 34 based on a command from the control unit 56.

[0018]

Since the disk loading control device according to the present invention is constructed as described above, when the large-diameter disk is at the insertion position, the central sensor detects this operation, and the small-diameter disk is at the center at the insertion position. The center sensor performs a detection operation when the position is at the right side, and at least one of the center sensor, the left sensor, and the right sensor performs a detection operation when the insertion position is shifted left and right. The loading drive is controlled in the retracting direction.

According to the present invention, the outer diameters are different.
Even when the insertion position is shifted to the left or right, the disc of the type can be driven in the retraction direction correctly. Especially,
At the time of driving in the retracting direction, one of the left and right outer sensors performs a detecting operation, so that it is immediately known that the disk is a small-diameter disk and that the small-diameter disk has been inserted into one of the left and right sides during the driving in the retracting direction. It is possible to quickly and accurately determine whether the non-detection state of the off-side sensor is a malfunction of the sensor or a misalignment of the disk, and the logical configuration of the pull-in motor control becomes extremely simple.

[Brief description of the drawings]

FIG. 1 is a main part plan view showing a disk reproducing apparatus to which an embodiment of the present invention is applied, when a large-diameter disk is used.

FIG. 2 is a plan view of a main part showing a state in which a small-diameter disk is used in the apparatus of FIG. 1;

FIG. 3 is a front view of a main part of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a control configuration diagram of the embodiment.

FIG. 6 is an explanatory diagram of a control operation of the embodiment.

FIG. 7 is a plan view of a main part showing a position where a large-diameter disc is inserted in the apparatus of FIG. 1;

FIG. 8 is a plan view of a main part showing a position where a small-diameter disc is inserted in the apparatus of FIG. 1;

FIG. 9 is a plan view of a main part of a disc reproducing apparatus to which another embodiment of a positioning mechanism is applied, when a large-diameter disc is used.

FIG. 10 is a plan view of a main part of the apparatus shown in FIG. 9 when a small-diameter disc is used.

FIG. 11 is a perspective view of a main part showing a conventional apparatus.

[Explanation of symbols]

12 Disc insertion slot 12 17 Transfer mechanism 20 Turntable 26 Clamp mechanism 27 Positioning mechanism 41 Central sensor 42 Left sensor 43 Right sensor 56 Control unit D ₁ Large-diameter disk D ₂ Small-diameter disk

Claims (1)

(57) [Claims] A transfer mechanism for transferring a large-diameter disk or a small-diameter disk between a disk insertion slot and a position above a turntable; a positioning mechanism for positioning the disk above a reproduction position; In a disc reproducing apparatus having a clamp mechanism for clamping to a table, a center sensor and left and right outer sensors that operate when a large-diameter disc is at an insertion position, and a small-diameter disc are inserted while being shifted left and right at the insertion position. A right sensor and a right sensor disposed at positions that can be detected even at different positions, and a control unit that starts driving in the retraction direction by the transfer mechanism, stops driving in the retraction direction, and determines the type of large-diameter disk and small-diameter disk. And the drive start is performed by one or more detection operations of the center sensor, the left sensor, and the right sensor. The control unit is configured to perform the driving stop by the non-operation of the left and right outer sensors or the left sensor and the right sensor, and to perform the type determination based on the presence or absence of the operation of the left and right outer sensors. Disk loading control device.