JPS6087464A - optical disc playback device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical disc playback device, and more particularly, to a mechanism for setting and ejecting a disc for playback.

In general, this type of playback device has two types of disc loading and ejecting directions: vertical and horizontal, but in most cases, the top lid opens and closes, so the height of the casing is limited. It is necessary to raise it to some extent,
There have been problems in terms of space, such as not being able to place other devices on top, or restrictions on the installation location. This invention was made in view of the above circumstances, and its purpose is to is an optical disc that has a horizontal type for setting and ejecting the disc, and also allows the disc to be inserted into and taken out from the housing, thereby reducing the height dimension and easing restrictions on the installation location. The aim is to provide a playback device.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a plan view of the main parts of the disc playback device of the present invention before it is set, and FIGS. 2 and 3 are a sectional view and a side view thereof, respectively, taken along the line ■-■. This disc playback device includes a disc tray 3 that moves horizontally with respect to a substrate 2 forming the bottom of a box-shaped housing 1 and is retractable into and out of the housing 1, and a playback device placed on the disc tray 3. When the disc 4 is in the set state (see FIG. 4), the turntable 5 and the disc chuck 6, which can be raised and lowered to freely rotate and hold the disc 4 in cooperation with each other, hold the disc tray 3 in the set state. It is equipped with a locking mechanism 7 that can be engaged and detached, and
The movement of the disks 1 to rays 3 into and out, the movement of the turntable 5 and the disk chuck 6 up and down, and the turntable 5
are driven by the retracting and moving means 8, the elevating means 9, and the driving means 10, respectively, and each of these means 8, 9
and 10 are connected to each other so as to be interlocked with each other.

In this case, the projecting and retracting moving means 8 and the elevating means 9 are each formed by a motor or the like that can rotate in forward and reverse directions, and the driving means 1
0 is formed by a disk drive motor.

The disc tray 3 includes a rectangular tray main body 12 having a notch 11 in the center thereof for guiding the turntable 5 and a disc drive motor 10 serving as its driving means;
It has a pair of legs 13.13 that protrudes into the housing from one side of the tray main body 12, and has an outer side on both sides of the tray main body 12 that extends from both legs 13.13 and this leg 13. A U-shaped guide groove 14.14 is formed which opens in the direction, and a rack 15 is formed on one of the inner surface of the leg portion 13.13 and the inner surface of the side wall of the tray main body 12 that is connected thereto. ing. The U-shaped guide groove 14.1
4, both side walls 2a of the substrate 2;

A plurality of guide rollers 16 installed on the guide roller 2a are rotatably fitted to support the disc tray 3 so as to be retractable from the substrate 2, that is, the housing l. Further, a motor 8 for ejection and retraction, which is an ejection and retraction movement means, is connected to a pinion gear 17 that meshes with the rack 15 via an appropriate transmission gear 18 for deceleration. It is designed to be able to appear and appear.

On the other hand, as illustrated in FIG. 5, the disk drive motor 10 is mounted on a support frame 38, and is arranged so as to be movable up and down on a movable frame 19 that is movable in the horizontal direction with respect to the board 2. There is. That is, the support frame 38 has side walls 19a, 19a of the movable frame 19.
and the side wall 2a of the substrate 2.

A support pin 22 is bored through one of the slits 2a, for example, an inclined slit 20 provided in the side wall 19a of the movable frame 19, and the other, for example, a vertical slit 21 provided in the side wall 2a of the substrate 2. ing. The leg portions 19b protruding in the moving direction of the movable frame 19 include
A rack portion 23 is formed, and a lifting motor 9 serving as the lifting means is connected to the rack portion 23 via a transmission mechanism 25 including a pinion gear 24 and a worm gear 25a.
are connected. Therefore, by rotating the motor 9 forward and backward to move the movable frame 19 in the horizontal direction, the disk motor 10 can be moved up and down to the set position and the non-set position via the support pin 22. (See Figure 4).

Further, as shown in FIGS. 3 and 4, the disk chuck 6 has one end of an arm 28 which is supported by a pin 27 on a bracket 26 erected on the substrate side wall 2a and is vertically swingable. is installed on. An operating section 29 is bent downward from the other end of the arm 28, and a roller 29a attached to the tip of the operating section 29 and a linear cam 30 formed on the movable frame 19 are always engaged. The other end of the arm 28 and the substrate 2
A tension spring 31 is installed between the two.

Therefore, when the movable frame 19 moves due to the rotation of the lifting motor 9, the linear cam 30 also moves, swinging the arm 28 via the rollers 29a, and moving the disc chuck 6 to the disc drive motor 10. It can be moved up and down into a set position and a non-set position in conjunction with each other.

As shown in FIGS. 1 and 6, the locking mechanism 7 includes an engaging protrusion 32 provided at the tip of the movable frame 19, one arm 33a of which moves as the disc tray 3 moves. A horizontally swingable bell crank-shaped first link 33 that engages with the
and a bell crank-shaped second link 34 that engages with the other arm 33b of the link 33 and swings in the horizontal direction, and the other arm 34 of the second link 34
The disc tray 3 is set by engaging the locking pawl 34c formed on the disc tray 3 with the rack-shaped locking part 35 formed on the inner surface of the tip of one of the legs 13.13 of the disc tray 3. It can be held in position. In this case, the arm portion 34a of the second link 34 and the board-2
A tension spring 36 is installed between them, and the elastic force of this tension spring 36 constantly connects the locking pawl 34c and the locking portion 35.
in the direction in which the first and second links 33. are disengaged.
34 is displaced and hangs. Therefore, when the disc tray 3 is pulled out, the lock mechanism 7 is released by moving the movable frame 19 in advance.

Note that 37 is a pickup unit that is placed on the support frame 38 together with the disk drive motor 10.

In the disc playback device of the present invention configured as described above, when performing a playback operation on the disc 4, first,
When the EJECT button (not shown) is operated, the motor 8 for ejecting and retracting rotates in the reverse direction, and the disc tray 3 is pulled out from the housing 1, resulting in the state shown in FIGS. 1 and 3. Then, place the disc 4 on the tray main body 12 of this disc tray 3 and press the PLAY button (not shown).
The retracting motor 8 rotates forward, and the disc tray 3 moves toward the set position via the transmission gear 18, pinion gear 17, and rack 15. When the disc tray 3 is moved to a predetermined position, a limit switch (not shown), for example, is closed, and the lifting motor 9 rotates to move the movable frame 19. As a result, when the disc tray 3 reaches the set position, the disc drive motor 10 including the turntable 5 moves up and down from below with respect to the disc 4, and the disc chuck 6 moves up and down from above. The disc 4 is rotatably held between the disc chuck 6 and the disc chuck 6, and the disc 4 is set. At the same time, the disc tray 3 is held at the set position by the lock mechanism 7. When these operations are completed, the disc drive motor 10 is activated, the pickup unit 37 is moved, and the disc 4 is played.

To take out the disc 4, the reverse operation to the above is performed by operating an EJECT button (not shown), and the disc 4 can be taken out by the disc tray 3.

As described above, according to the disc playback device of the present invention, the disc tray is formed so that it can be pulled out horizontally with respect to the casing, so that the height of the casing can be made thin, and the upper part of the Other devices can be placed on the holder, making effective use of the installation space and easing restrictions on the installation location. In addition, all operations such as moving the disc tray, setting and unsetting the disc drive motor and disc chuck, and driving the disc drive motor can all be performed in conjunction with each other automatically, making operations simple and quick. At the same time, excellent effects such as an increase in the life of the device can be obtained, so its utility value is remarkable.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of the disc playback device of the present invention before it is set, FIG. 2 is a sectional view taken along the line ■-n in FIG. 1, and FIG. 3 is a side view of FIG. 1. FIG. 4 is a side view showing the set state, FIG. 5 is an exploded perspective view showing the support mode of the turntable and its driving means in the present invention, and FIG.
The figure is a plan view showing the locking mechanism in this invention. In the figure, ■ is the housing, 2 is the board, 2a is the side wall, 3 is the disk tray, 4 is the disk, 5 is the turntable, 6 is the disk chuck, 7 is the locking mechanism, 8 is the motor for moving in and out (the movement means for moving in and out) ), 15 is a rack, 17 is a pinion gear, 18 is a transmission gear, 19 is a movable frame, 19a is a side wall, 20 is an inclined slit, 21 is a vertical slit, and 22 is a support pin. 23 is a rack part, 24 is a pinion gear, 25 is a transmission mechanism, 28 is a frame, 29 is an operating part, 29a is a roller, 30
is a linear cam, 31 is a tension spring, 32 is an engaging protrusion, 33
34 is a first link, 34 is a second link, 34c is a locking pawl, 35 is a rack-shaped locking portion, and 36 is a tension spring.

Claims (1)

[Scope of Claims] (1) An optical disc playback device that horizontally sets and ejects a disc for playback, comprising: a disc tray that is horizontally retractable with respect to a housing;
A turntable and a disc chuck that can be freely raised and lowered cooperate with each other to rotatably clamp the disc placed on the disc tray when the disc is in the set state, and a removable turntable that holds the disc tray in the set state. and a locking mechanism, and the projection/retraction movement of the disc tray, the elevating/lowering movements of the turntable and disc chuck, and the drive of the turntable are performed by the nine ejection/retraction moving means, the elevating/lowering means, and the driving means, and each of these An optical disc reproducing device characterized in that the means are interlocked with each other. (2) In claim (1), the optical system is characterized in that the disc tray ejecting and retracting means comprises a rack provided on the disc tray and a motor capable of forward and reverse rotation including a pinion gear that meshes with the rack. (3) In claim (1), an inclined slit provided in either one of a side wall of a movable frame movable in a horizontal direction with respect to the housing and a side wall on the housing side; and a vertical slit provided in the other side wall, and a lifting means comprising a motor or the like that supports the turntable and its driving means by a support pin passing through the vertical slit, and can rotate the movable frame forward and backward via a transmission mechanism as appropriate. (4) According to claim (1), the disc chuck is attached to one end of an arm that is swingable in a direction perpendicular to the housing. At the same time, the other end of the arm is engaged with a linear cam formed on a movable frame that is movable horizontally with respect to the casing and controls the elevation of the turntable and its driving means. Optical disc playback device. (5) In claim (1), the locking mechanism has a horizontally swingable bell crank shape that can engage with a movable frame that moves with the movement of the disc tray. a first link that engages with the first link to swing in the horizontal direction, and a locking pawl formed on the arm portion of the first link that locks into a rack-shaped locking portion provided on the disc tray. 1. An optical disc playback device, characterized in that the optical disc playback device comprises a second link in the form of a bell crank.