JPH05189860A - Compact disc reproducing apparatus - Google Patents

Abstract

PURPOSE:To reduce the time required for the movement of a pickup table in relation to the selection of a compact disc significantly and facilitate the quick reproduction operation of a compact disc reproducing apparatus by a method wherein the pickup table is supported with an intermediate table therebetween and both the tables are made to ascend or descend simultaneously by at least two motors. CONSTITUTION:A pickup table 10 is supported by a reproduction apparatus main part 2 with an intermediate table 7 therebetween and both the pickup table 10 and the intermediate table 7 are made to ascend and descend by lift motors 14 and 16 respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for reducing the operating time of a compact disc reproducing apparatus.

[0002]

2. Description of the Related Art With the spread of compact discs, reproducing apparatuses for them have been diversified.
Various types of long-time compact disc reproducing apparatuses have been proposed which can sequentially reproduce any one of these discs by setting (~ 18) discs.

FIG. 10 is a perspective view of a conventional compact disc reproducing apparatus, in which a reproducing apparatus main body 101 is equipped with magazine cases 103, 103 each containing six disc trays 102. Playback device body 10
A pickup table 106 supported by pantograph levers 104 and 105 is provided at the rear part of the No. 1 unit.

The pickup table 106 has a tray hook 10 for pulling out the disc tray 102.
7. Swing arm 1 for driving the tray hook 107
08 and an optical pickup unit (not shown) for reproducing the disc are provided. Further, the pickup table 106 is moved up and down by the forward / reverse rotation of the elevating motor 110 as a gear 111 of the elevating motor 110 meshes with a fan-shaped gear 109 formed at one end of the pantograph lever 104.

In the above-mentioned magazine case 103, six disc trays 102 ... In this example are stacked and stored in a drawer form, and one compact disc of your choice is placed on each of these disc trays 102. 2 sheets
Magazine case) can be installed once.

The operation of the conventional compact disc reproducing apparatus will be described below. When the power of the compact disc player is turned on, the pickup table 106 is once lowered to the lowest position, and the photo switch 112 attached to the table 106 is used as a reference for the lowest position, and the punching plate 113 attached to the player body 101 is used. Start counting holes 114 ...

[0007]

For example, when the uppermost compact disc is selected, the pickup table 106 ascends from the lowermost position to the uppermost position, and the time for this is not short.

In recent years, there has been a demand for increasing the number of magazine cases 103 to three or four, and it is necessary to shorten the waiting time associated with the above selection.

[0009]

In order to meet the above demands, the present invention supports a pickup table in a reproducing apparatus main body so as to be able to move up and down via an intermediate table, and the pickup table and the intermediate table are moved up and down by an elevator motor. It is characterized in that it is configured as follows. Preferably, the chassis is provided with the optical pickup and the disk rotation motor, and the intermediate table is formed with a large opening through which the upper portion of the optical pickup and the disk rotation motor can pass.

[0010]

By simultaneously starting a plurality of lifting motors, the time required for lifting the pickup table is shortened.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a compact disc reproducing apparatus according to the present invention.
Are the three magazine cases 3, 3, 3 in the playback device body 2.
(Each of which has 6 disc trays DT ...) Can be mounted, and the chassis 4 extending rearward from the reproducing apparatus main body 2 supports the intermediate table 7 via the lower pantograph levers 5 and 6, and the intermediate table 7 is supported. 7, the pickup table 10 is supported by the upper pantograph levers 8 and 9.

The pickup table 10 has a tray hook 11 and a swing arm 1 similar to those described in the conventional section.
2. An optical pickup unit (not shown) and the like are provided.

The lower motor 14 shaft is connected to the fan gear 5a at one end of the lower pantograph lever 5 via the gear 13, and the upper motor 16 is connected to the fan gear 8a at one end of the upper pantograph lever 8 via the gear 15. ing. still,
The lower motor 14 is attached to the reproducing apparatus main body 2 or the chassis 4, and the upper motor 16 is attached to the intermediate table 7.

FIG. 2 is a diagram of a level detecting mechanism according to the present invention. The reproducing apparatus main body 2 has first, second and third switches S.
1, S2, S3 are attached in order from bottom to top. These first to third switches S1 to S3 are preferably micro limit switches or small reflection type photo switches having light emitting / receiving elements built therein, and these switches S1 to S3 are preferable.
Is operated by a detection piece 17 (corresponding to a push plate or a reflection plate) stretched from the intermediate table 7.

On the other hand, a perforated plate 18 is provided upright on the intermediate table 7, and the holes H1 to H6 (first to sixth holes) of the perforated plate 18 are extended from the pick-up table 10. 19 monitors. This photo switch is a transmissive photo switch and is turned on / off depending on whether or not there is a light shield between the light emitting / receiving element.

The operation of the compact disc reproducing apparatus having the above structure will be described below. FIG. 3 is a flow chart of the compact disc reproducing apparatus of the present invention. When the power is turned on, in step 1 (abbreviated as “STO1”; the same applies hereinafter), the lowest hole H1 (shown in FIG. 2) of the perforated plate 18 is shown. First
When the photo switch 19 does not match the hole H1), the upper motor 16 lowers the pickup table 10 and stops the upper motor 16 when the first hole H1 is detected.

On the other hand, in STO2, the detection piece 1 of FIG.
When the switch 7 is not engaged with any of the first to third switches S1 to S3, the lower motor 14 is started and the first to third switches near
It is necessary to align any of the third switches S1 to S3. In this embodiment, the lower motor 14 is driven in the descending direction to align the detection piece 17 with the first or second switch S1, S2.

Now that the initial setting is completed, STO3
Specify the address of the song, etc.

The microcomputer selects the first to sixth holes H1 to H6 and the first to third switches S1 to S3 according to the input address (ST).
O4). For example, when the top disc is designated, the microcomputer designates the sixth hole H6 and the third switch S3.

According to the instruction of the microcomputer, the upper motor is started in STO5 in the ascending direction and stopped when the sixth hole H6 is detected. On the other hand, in STO6, the lower motor is started in the ascending or descending direction and stopped by the third switch S3ON.

Pulling out the disc trays DT ... With the tray hooks 11 to the pickup table 10 set to a predetermined level to perform reproduction is the same as the conventional reproducing operation.

In the case of reproducing the next music piece in STO7, a new address is designated (STO3), and the upper motor 16
And the lower motor 14 may be moved up / down respectively.

The position information of the first hole H1 to the sixth hole H6 of the upper motor 16 is stored in the microcomputer until the power is turned off. Is saved.

FIG. 4 is a time chart of the compact disc reproducing apparatus according to the present invention, in which the upper motor 16 moves from the first hole H1 to the sixth hole H6 at the maximum, while the lower motor 14 moves at the maximum to the first switch. Move from S1 to the third switch S3.

On the other hand, the conventional lifting motor shown in the comparative example moves from the first hole to the eighteenth hole (in the case of three magazines), so the predetermined time for that is about three times that of the embodiment. Therefore, the compact disc reproducing apparatus of the present invention can significantly reduce the time required for disc selection.

FIG. 5 is a diagram showing another embodiment of the compact disc reproducing apparatus according to the present invention. The same parts as those shown in FIG. 1 are designated by the same reference numerals and their explanations are omitted.

Eighteen holes h1 to h18 in the reproducing apparatus main body 2
Is a perforated plate 2 in which (first hole h1 to eighteenth hole h18) are opened.
1 is attached, and these holes h1 to h18 are monitored by the photo switch 22 of the pickup table 10, which is different from the compact disc reproducing apparatus of FIG. That is, the first to third switches S1 to S3 and the detection piece 17 of FIG. 1 are omitted.

In FIG. 5, immediately after the power is turned on, the photo switch 22 is lowered to the lowest first hole h1 for level resetting. When the address is designated, the upper and lower motors 16 and 14 simultaneously start moving up and down, and when the photo switch 22 reaches the designated holes h1 to h18, they stop at the same time.

Therefore, in the other embodiment of FIG. 5, the pickup table 10 moves up at a speed twice as high as that of the conventional one, so that the required time is reduced to about half.

In the embodiment, the number is one, but a plurality of intermediate tables 7 may be used, and the number of lifting motors may be increased accordingly.

An optical pickup and a disk rotation motor are provided below the pickup table 10 in FIGS. 1 and 5, and the optical pickup traces the bit on the lower surface of the disk. The optical pickup and the disc rotation motor are mounted on the lower surface of the pickup table 10 through an appropriate lifting means, as well as on the intermediate table 7 described below (FIG. 6) or on the chassis 4 (FIG. 8). ).

FIG. 6 is a diagram showing an example in which the optical pickup unit of the compact disc reproducing apparatus of the present invention is attached to an intermediate table. On the intermediate table 7, a disc rotating motor 30, a turntable 31, and an optical pickup 32 are provided.
A so-called mechanical unit including the guide rail 33 is attached. The pickup table 10 is lifted up to a desired stage in the manner described above, and the disc D is pulled out at that level.

FIG. 7 is an operation diagram of FIG. 6, in which the disc D is supported by the turntable 31 on standby on the intermediate table 7 when the pickup table 10 is rapidly lowered. After this, recording / reproduction is performed by the disk rotation motor 30 and the optical pickup 32.

FIG. 8 is a diagram showing an example in which the optical pickup unit of the compact disc reproducing apparatus of the present invention is attached to the chassis.
A so-called mechanical unit including a turntable 31, an optical pickup 32 and a guide rail 33 thereof is attached. Further, the intermediate table 7 is formed with a large opening 34 through which the mechanical unit can pass. That is, the intermediate table 7 has a shape close to a square frame when seen in a plan view. Then, the pickup table 10 is lifted to the desired stage in the manner described above, and the disc D
Pull out.

FIG. 9 is a diagram showing the operation of FIG. 8. The pickup table 10 and the intermediate table 7 are simultaneously lowered at a high speed, so that the disk D is supported by the turntable 31 waiting on the chassis 4. After this, recording / reproduction is performed by the disk rotation motor 30 and the optical pickup 32. In particular, in the configuration of FIG. 8, since the delicate optical pickup unit can be arranged on the chassis 4 which is a non-movable member, there is no inconvenience that the life of the optical pickup unit is shortened or the accuracy is deteriorated.

Therefore, regardless of which table the optical pickup unit or the mechanical unit is attached to, the present invention in which the chassis 4, one or a plurality of intermediate tables 7, and the pickup table 10 are stacked can be constructed, and the respective effects can be obtained. It is something that can be demonstrated.

[0038]

As described above, according to the present invention, the pickup table is supported via the intermediate table, and the pickup table is raised or lowered simultaneously by at least two motors. The time required for the movement has been greatly shortened, and the reproduction work of the compact disc reproduction device has become quicker.

By attaching the optical pickup unit to the chassis, it is possible to bring out the accuracy of the optical pickup unit without giving harmful vibration to the optical pickup unit.

[Brief description of drawings]

FIG. 1 is a perspective view of a compact disc reproducing apparatus according to the present invention.

FIG. 2 is a diagram of a level detection mechanism according to the present invention.

FIG. 3 is a flowchart of the compact disc reproducing apparatus of the present invention.

FIG. 4 is a time chart of the compact disc reproducing apparatus according to the present invention.

FIG. 5 is a diagram of another embodiment of the compact disc reproducing device according to the present invention.

FIG. 6 is a diagram showing an example in which the optical pickup unit of the compact disc reproducing apparatus of the present invention is attached to an intermediate table.

FIG. 7 is an operation diagram of FIG.

FIG. 8 is a diagram showing an example in which an optical pickup unit of the compact disc reproducing apparatus of the present invention is attached to a chassis.

FIG. 9 is an operation diagram of FIG.

FIG. 10 is a perspective view of a conventional compact disc reproducing device.

[Explanation of symbols]

1 ... Compact disc reproducing device, 2 ... reproducing device main body,
3 ... Magazine case, 4 ... Chassis, 5, 6 ... Lower pantograph lever, 7 ... Intermediate table, 8, 9 ... Upper pantograph lever, 10 ... Pickup table, 14 ... Lower motor as a lifting motor, 16 ... As a lifting motor Upper motor, 30 ... Disk rotation motor, 31 ... Turntable, 32 ... Optical pickup, 33 ... Guide rail, 34 ... Opening of intermediate table, D ... Disk, DT ...
Disc tray.

Claims (2)

[Claims] 1. A magazine case in which a plurality of disc trays are housed in such a manner that they can be pulled out while maintaining a constant interval.
A compact disc reproducing apparatus capable of mounting more than one disc, wherein the disc tray is transferred to a pickup table at the rear of the apparatus for reproduction, and the pickup table is moved up and down through the intermediate table of the reproducing apparatus body. A compact disc reproducing device, which is movably supported, and is configured such that the pickup table and the intermediate table are moved up and down by an elevator motor, respectively. 2. An intermediate table for supporting the pickup table is supported by a chassis of a reproducing apparatus main body, an optical pickup and a disk rotation motor are attached to the chassis, and an upper portion of the optical pickup and the disk rotation motor penetrates the intermediate table. The compact disc reproducing apparatus according to claim 1, wherein a large opening is formed.