JPH0419628Y2 - - Google Patents

Description

[Detailed explanation of the invention] "Industrial application field" This invention is designed for use with video discs (hereinafter referred to as "VD") with a diameter of 30 cm and compact discs (hereinafter referred to as "CD") with a diameter of 12 cm. This invention relates to a compatible disc player that can play both.

"Conventional technology" Conventionally, in compatible disc players that can play both VD and CD,
Each was regenerated using a dedicated spindle motor. Figure 1 shows the VD and CD
By connecting two spindle motors for use with a motor holder, it is possible to appropriately select a dedicated spindle motor at the playback position during playback.

``Problems to be solved by invention'' As mentioned above, conventional compatible disc players use two spindle motors dedicated to VD and CD.
The player itself cannot be made compact and costs cannot be reduced.

In addition, a compatible disk player as shown in Fig. 1 has two spindle motors A and B dedicated to VD and CD connected by a motor holder.
The rotation of the motor holder C moves it to the playback position. Therefore, if the positioning accuracy at the playback position is poor, there is a risk that the spindle motor will rotate with the rotation axis of the spindle motor tilted. Furthermore, there is a risk that the harnesses, which are wires that supply power to the spindle motors A and B, may be pulled together or that the harnesses may become entangled with each other.

"Means for Solving the Problems" This invention was made to solve the above-mentioned drawbacks.
By configuring the player to play both discs (DVD and CD), the player itself can be made more compact and reduce costs, and by configuring the player to clamp VD and CD discs with dedicated clampers, it is possible to VD and
To provide a compatible disk player whose purpose is to clamp both disks of a CD in an optimal state.

"Embodiments" The present invention will be described below based on embodiments shown in the drawings.

FIG. 2 is a longitudinal cross-sectional view showing the compatible disc player according to the present invention before operation;
FIG. 4 and FIG. 4 are longitudinal cross-sectional views showing different reproduction states of the disk.

In the above drawing, 1 is a player cabinet, 2 is a video disc (VD), and 3 is a compact disc (CD). 4 is the above VD
This is a spindle motor for rotationally driving CD2 and CD3. A disc-shaped turntable 5 is fixed to the rotating shaft of the spindle motor 4.

Reference numeral 6 denotes a rotating shaft for the VD 2, which is rotatably supported by a bearing 7. The lower end 6a of this rotating shaft 6
A clamper 8 having an outer diameter suitable for clamping the VD 2 (a diameter corresponding to the clamping area of the VD) is fixed to the clamper 8 . Further, a centering hub 9 for centering the VD2 is inserted into the rotating shaft 6 inside the clamper 8 so as to be movable in the direction of the rotating shaft 6. This centering hub 9 is urged in the direction of the rotating shaft 6 by a spring 10. Note that a convex portion 12 is formed at the upper end of the rotating shaft 6 and is engageable with a concave portion 11 formed at the center of the turntable 5.

On the other hand, 13 is a rotating shaft for the CD, which is rotatably supported by a bearing 14. The lower end of this rotating shaft 13 is fixed to the lower end 6a of the rotating shaft 6 for VD2 at a predetermined angle θ. A clamper 15 having an outer diameter suitable for clamping the CD 3 (a diameter corresponding to the clamping area of the CD) is fixed to the rotating shaft 13. , Also, the rotating shaft 13 has
Inside the clamper 15, a centering hub 16 for centering the CD 2 is inserted so as to be movable in the direction of the rotating shaft 13. Then, this centering hub 16 is attached to the rotating shaft 1 by a spring 17.
It is biased in three directions. Note that a convex portion 18 is formed at the upper end of the rotating shaft 13 and can be freely engaged with the concave portion 11 of the turntable 5.

"Operation" Next, the operation of the above embodiment will be explained.

First, the case of playing VD2 will be explained. When playing VD2, the clamper 8 is positioned at the playback position as shown in FIG.
The rotating shaft 6 for the VD2 is located coaxially with the spindle motor 4, and when the VD2 is placed on the clamper 8, the centering hub 9 enters the center hole 2a of the VD2 to center the VD2. Next, as shown in FIG. 3, when the spindle motor 4 is lowered, the turntable 5 is moved.
The centering hub 9 comes into contact with the VD2, moves the centering hub 9 down against the elastic force of the spring 10, and presses the VD2 against the clamper 8. In addition, the recess 1 of the rotating shaft 6
2 engages with the recess 1 of the turntable. Therefore, when the spindle motor 4 is driven, the VD 2 rotates together with the clamper 8 and the centering hub 9. At this time, the rotating shaft 13 for the CD3 is inclined at an angle θ, so that it does not inhibit the rotation of the VD2.

Next, the case of playing CD3 will be explained. When playing a CD 3, as shown in FIG. axis of rotation 1
3 at the playback position and place the CD 3 on the CD 3 clamper 15, the centering hub 16 enters the center hole 3a of the CD 3 and the CD 3 is placed on the CD 3 clamper 15.
centering is performed. Then, when the spindle motor 4 is lowered, the turntable 5 is
CD3 contacts and lowers the centering hub 16 against the elastic force of the spring 17.
is crimped onto the clamper 15. Further, the convex portion 18 of the rotating shaft 13 engages with the concave portion 1 of the turntable.
Therefore, if the spindle motor 4 is driven, the CD
3 rotates together with the clamper 15 and centering hub 16. At this time, the rotating shaft 6 for the VD2 is tilted at an angle θ,
Does not inhibit CD3 rotation.

"Effects of the Invention" As mentioned above, the present invention selectively provides the first clamper 8 having an outer diameter compatible with the video disc 2 and the second clamper 15 having an outer diameter compatible with the compact disc 3. means for positioning the disks 2, 3 at the playback position; and a single unit that clamps the disks 2, 3 in cooperation with the first or second clamper 8, 15 at the playback position and rotationally drives the disks 2, 3. spindle motor 4
It is equipped with the following.

Therefore, with a single spindle motor, VD and
Since both discs of a CD can be played, the player itself can be made more compact and costs can be lowered.

In addition, we have eliminated the need for a motor holder, which is a mechanism for moving the spindle motor, so that the spindle motor cannot be moved to a position other than the playback position, so a special mechanism is required to accurately position the spindle motor at the playback position. Even without,
VD when the rotation axis of the spindle motor is tilted
There is no need to worry about the disc or CD rotating, and the spindle motor can be rotated in a stable state. Furthermore, the harnesses, which are wires that supply power to the spindle motor, will not be pulled together or become entangled with each other.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing a conventional compatible disk player, FIG. 2 is a vertical cross-sectional view showing the compatible disk player according to the present invention before operation, and FIGS. 3 and 4 are views of different disk players. FIG. 2...Video disk (VD), 3...Compact disk (CD), 4...Spindle motor,
5...Turntable, 8,15...Clamper,
θ...Angle.

Claims (1)

[Claims for Utility Model Registration] Means for selectively positioning a first clamper 8 having an outer diameter compatible with the video disc 2 and a second clamper 15 having an outer diameter compatible with the compact disc 3 at the playback position. and a single spindle motor 4 that cooperates with the first or second clamper 8, 15 to clamp the discs 2, 3 at the reproduction position and rotationally drives the discs 2, 3. A compatible disk player characterized by: