JPH0629834Y2 - Disc player - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention relates to a disc reproducing apparatus, and more specifically, it can selectively reproduce a first disc and a second disc and stores a plurality of second discs. The present invention relates to a disc reproducing device capable of continuous random reproduction. The first disc in this specification refers to a disc-shaped recording medium on which information is optically recorded, which has a large diameter (for example, a video disc), and the second disc has a small diameter (for example, a disc). Compact disc, etc.).

(B) Conventional technology In the conventional disk reproducing apparatus of this type, a case of selectively reproducing a video disk and a compact disk,
In the case of continuous random reproduction of a plurality of compact discs, different disc reproduction devices were used for reproduction.

(C) Problems to be solved by the device However, in the above-mentioned disc reproducing apparatus, a plurality of types of discs which are or are being supplied to the market at present, namely a 30 cm diameter video disc, a 20 cm diameter video disc, and a 12 cm diameter disc.
It was uneconomical to prepare two disc reproducing devices in order to reproduce a compact disc with a diameter image and a compact disc with a diameter of 8 cm and to continuously reproduce a compact disc with an image or a compact disc continuously. In addition, there is a problem that the volume of the disc reproducing device becomes large if one disc reproducing device is attempted to be integrated.

The present invention has been made in view of the above circumstances, and its purpose is to reproduce a plurality of types of discs with a single disc reproducing device without enlarging the outer shape, and for discs on the small diameter side (12 cm diameter and 8 cm diameter discs). Is to provide a disc reproducing apparatus capable of continuous random reproduction.

(D) Means for Solving the Problems This invention selectively mounts a first disk or a second disk, and rotates the first disk by a first motor and the second disk by a second motor. And a first turntable on which a plurality of kinds of first disks having different diameters are detachably mounted and which are coupled to a first motor and which are configured to reproduce both disks by a common pickup. , Parallel to and apart from a lower portion of a first disc mounted on the first turntable and having a hole centering a hole for projecting a coupling shaft of the first turntable and the first motor, A coaxially arranged tray, a plurality of circular recesses distributed in concentric circles on the upper surface of the tray so that plural kinds of second discs having different diameters are selectively placed, and a radial direction of the tray. In addition, a substantially rectangular opening that penetrates the tray across the diameter of each circular recess and connects to the hole, and a pickup provided at the bottom of the tray moves in the radial direction of the tray and moves through the opening to the first position. 1 disc or 2nd
A pickup guide for guiding the pickup to reproduce the information recorded on the disc, and a second motor, which is provided so that its center coincides with the movement line of the pickup and rises through the opening. A second turntable that rotatably supports the second disc away from the tray; a plurality of rollers that rotatably support the tray by contacting the peripheral edge of the tray; A disc reproducing apparatus comprising: tray rotating means for rotating the tray so that the tray is positioned on the starting line of the pickup.

(E) Action According to the present invention, when the first disc having a desired diameter is placed on the first turntable and the disc reproducing device is operated, the first turntable is rotated by the drive of the first motor, and the pickup is picked up. Moves along the opening to reproduce the information recorded on the first disc. When a second disc having a desired diameter is placed in each of the circular recesses of the tray in a state where the first disc is not placed on the first turntable and continuous random reproduction operation is performed from the operation unit of the disc reproduction device, The tray rotating means rotates the tray so that the desired second disc is located on the movement line of the pickup in accordance with the reproduction order, and the pickup moves along the opening to reproduce the information recorded on the second disc. It

(F) Embodiments The invention will be described based on embodiments shown in the drawings. The invention is not limited to this.

FIG. 1 is a plan view showing an essential part of an embodiment of the present invention,
FIG. 2 is a side sectional view of FIG. 1 in both figures
Is a turntable for the video disc (first disc), which is connected to the rotary shaft 2a of the spindle motor 2 for the video disc that rotates the video disc. The 30 cm diameter video disc A and the 20 cm diameter video disc (not shown) are Placed selectively. Reference numeral 3 denotes a disk-shaped tray which has a video disk turntable 1 and a hole 4 through which a rotary shaft 2a projects, as a center, and is separated from and parallel to the lower part of the video disk placed on the video disk turntable 1. , And is arranged coaxially with the video disk turntable 1. Four first circular recesses 5a, 5b, 5c, 5d are formed concentrically on the upper surface of the tray, and the first circular recesses 5a-5d are formed in the first circular recesses 5a-5d. Having a bottom surface deeper than the bottom surface of 5d,
The second circular concave portions 6a, 6 are concentric with the circular concave portions 5a to 5d.
b, 6c, 6d are formed. Then, compact discs (second discs) B with images are placed in the first circular concave portions 5a to 5d, respectively, and the second circular concave portions 6a to 6 are formed.
A compact disc (second disc) C is placed on each d. Further, the tray 3 penetrates the tray 3 in the radial direction of the tray 3 and across the diameter of each of the first circular recesses 5 a to 5 d, and penetrates the tray 3 to connect with the hole 4.
It has a, 7b, 7c and 7d. This opening 7a-
7d is for passing a laser beam emitted from a pickup described later. 8a, 8b, 8c, 8
d is a roller that rotatably supports the tray 3, and
Are provided so as to come into contact with the peripheral edge of at equal intervals. A pick-up 9 reads the information recorded on the video disc A or the compact discs B and C by emitting a laser beam and detecting the reflection thereof. 10a, 10
Reference numeral b is a pickup guide.
For guiding the pickup 9 so as to move in the radial direction of the tray 3 and to reproduce the information recorded on the video disc A or the compact discs B and C through the opening 7a. belongs to. Reference numeral 11 is a spindle motor for a compact disc. Reference numeral 12 is a turntable for compact disc, which is a rotary shaft 11 of a spindle motor 12 for compact disc.
It is connected to a and is provided at the bottom of the tray 3 so that its center coincides with the movement line of the pickup 9. The compact disc turntable 12 is located further below the pickup guides 10a and 10b so as not to interfere with the movement of the pickup 9 during reproduction of the video disc A, and rises during reproduction of the compact discs B and C, and the opening of the tray 3. The compact disc B with an image passing through 7b is floated above the first circular recess 5b or the compact disc C is floated above the second circular recess 6b. A tray rotation motor 13 is provided near the tray 3, and a belt 14 is stretched around the rotation shaft 13 a of the tray rotation motor 13 and the tray 3.
The tray rotation motor 13 is configured to be controlled by a control unit (not shown) in the disc reproducing apparatus, and rotates the tray 3 to move the desired compact discs B and C to the pickup 9 position.

Next, the operation of this invention will be described.

(1) When playing a video disc When one of the 30 cm diameter video disc A and the 20 cm diameter video disc is placed on the video disc turntable 1 and the playback operation is performed from the input section of the disc playback device, the tray 3 Does not rotate, and the video disk A is sandwiched by the video disk turntable 1 and a clamp (not shown) that descends from above the video disk turntable, and then rotates. The pickup 9 moves from the inner peripheral side to the outer peripheral side of the video disc A, and the opening 7
The information recorded on the video disk A is reproduced by emitting a laser beam to the surface of the video disk A through b and detecting the reflected light.

(2) When playing a compact disc in a continuous random manner, the compact disc B with an image is placed in the first circular recessed portions 5a to 5d, or the compact disc C is placed in the second circular recessed portions 6a to 6d. When the operation of continuous random reproduction is performed from the input unit of, the control unit drives the tray rotation motor 13 and the tray 3 is rotated by this, and the first circular concave portion on which the desired compact disc B with the image is placed is Alternatively, the second circular concave portion on which the desired compact disc C is placed is moved to the pickup 9 position. The pickup 9 is instructed in advance by the control unit to be located between the compact disc spindle motor 11 and the video disc spindle motor 2, and the compact disc with video B by moving within the above range as in the case of reproducing the video disc. Alternatively, the information recorded on the compact disc C is reproduced.

(G) Effect of the Invention According to the present invention, it is possible to selectively reproduce a plurality of types of discs having different diameters with a single disc reproducing device without increasing the outer shape. By rotating the tray, the compact disc can be continuously and randomly reproduced.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of the present invention, and FIG. 2 is an enlarged side view of FIG. 1 including a partial cross section. A ... 1st disc, B, C ... 2nd disc, 1 ... 1st turntable, 2 ... 1st motor, 3 ... Tray, 4 ... Hole part, 5a-5d, 6a- 6d ... Circular recess, 7a-7d ... Opening, 8a-8d ... Roller, 9 ... Pickup, 10a, 10b ... Pickup guide, 11 ... Second motor, 12 ... Second turntable, 13 , 14 ... Tray rotating means.

Claims (1)

[Scope of utility model registration request] 1. A first disc or a second disc is selectively mounted, the first disc is rotated by a first motor, the second disc is rotated by a second motor, and both discs are picked up by a common pickup. A disc reproducing apparatus configured to reproduce, a first turntable which is coupled to a first motor and detachably mounts a plurality of types of first discs having different diameters, a first turntable and a first motor A tray having a hole for projecting a coupling axis of the center of the tray, which is spaced apart from and parallel to the lower part of the first disc mounted on the first turntable and coaxially with the first turntable; A plurality of circular recesses distributed in concentric circles on the upper surface of the tray so that a plurality of different second disks are selectively placed, and a radial recess of the tray and across the diameter of each circular recess. A substantially rectangular opening penetrating the tray and connected to the hole, and a pickup provided in the lower part of the tray moves in the radial direction of the tray to record on the first disk or the second disk through the opening. A pickup guide for guiding the pickup to reproduce the stored information, and a second motor, which is provided so that its center coincides with the movement line of the pickup and moves upward through the opening, thereby A second turntable that rotatably supports the disc away from the tray, a plurality of rollers that abut the peripheral edge of the tray and rotatably support the tray, and an opening of a predetermined circular recess on the movement line of the pickup. And a tray rotating means for rotating the tray so as to be located at the position.