JPS6182365A - Disc reproducing device - Google Patents

Abstract

PURPOSE:To miniaturize the entire device by elevating/descending a disc reproducing mechanism along a cam of a rotation body forming a cam requiring one rotation or over from one end until reaching the other end to attain the elevating/descending operation by a small-sized drive source. CONSTITUTION:The cam 20 requiring one revolution or over of a gear 19 is formed to a cam gear 19 from one end until reaching the other end and the cam 20 applies elevating/descending operation of a disc reproducing mechanism 13. Thus, even when the diameter is small as the gear 19, sufficient torque is generated and the miniaturization of the entire disc reproducing device is progressed effectively.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a disc playback device such as an optical compact disc player, and particularly to a disc playback device that plays back a disc placed on a disc F-ray. The present invention relates to an improvement of a drive unit that raises and lowers a mechanism unit.

[Technical Background of the Invention] As is well known, in disc playback devices such as optical combinations and disc players, a so-called horizontal loading type disc tray on which a disc is placed moves in and out horizontally. Things are becoming popular. Generally, such a horizontal loading type disc playback device is installed at the bottom of the disc tray with the disc tray turned on, that is, the disc i-ray is completely housed in the cabinet, and the turntable, disc motor, and optical A disc reproducing mechanism unit equipped with a pickup, a pickup feed motor, etc. moves up to clamp the disc, rotates the disc, and performs reproduction. Also, when unloading a disk,
This is done by lowering the disc reproducing mechanism and then pushing out the ray onto the disc 1 from within the key ↑ vignette.

[Problems with weight technology] By the way, as the above-mentioned disc playback mechanism is equipped with a turntable, a disc motor, an optical pickup, a pickup feed motor, etc. as mentioned above, the weight of the disc playback mechanism is increased by the weight of other mechanisms. It is considerably heavier. For this reason, conventionally, it is necessary to use a large torque motor, a doll's cam machine #I, etc. as a drive unit for raising and lowering the disc playback mechanism, which increases the overall size of the disc playback device. There is a problem that Jn <.

[Object of the invention] This invention IJ was made in consideration of the above circumstances, and -i
Isk? The lowering operation of the Li + Xl structure can be avoided using a small drive source, effectively promoting downsizing.
1" to provide a disc playback device to the 61st generation.

[Summary of the Invention 1 In other words, the disc playback device according to the present invention
a disk mill lay on which a disk is placed, and a disk playback mechanism that is supported to be able to rise and fall in a direction substantially perpendicular to the disk one lay and regenerates the disk branched to the disk one lay. A rotary body formed with a cam portion to which rotational driving force is transmitted and which requires one or more revolutions to reach the other end from one end to the other, and By providing a power transmission mechanism for raising and lowering the disk playback mechanism, the lifting and lowering operations of the disk playback mechanism can be performed by a small drive source, effectively promoting downsizing. This is what I did.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1 (a>, (b)), 11 is a main chassis, and on the upper surface side of the main chassis 11,
Disk 1-ray 12 is indicated by arrow A in the figure.

It is supported so as to be slidable in the B direction. A disk mounting portion 12a on which a disk (not shown) is placed is formed at the right end of the disk mill lay 12 in the drawing.

Further, on the lower surface side of the main chassis 11, a disc playback am section 13 is provided. Although not shown, the disc playback mechanism section 13 includes a turntable for placing the disc, and a disc motor for rotationally driving the turntable.

The apparatus is equipped with an optical pickup for reading data from the disk rotated by the disk motor, and a pickup feed motor for moving the optical pickup in the radial direction of the disk.

One end of the data storage reproducing mechanism section 13 is rotatably supported by a shaft 11a fixed to the main seat 11 in the directions of arrows C and Dh in the figure, so that it can be moved up and down. .

Further, the disk loading section 12a of the disk tray 12
A clamp member 14 is located above the center of the.

The clamp member 14 is attached to one end of a clamp arm 15 that is rotatably supported by a shaft 111 fixed to the main chassis 11.

The other end of the clamp arm 15 is connected to the disc playback mechanism section 13 via a connecting arm 16, and the clamp member 14 is brought into pressure contact with the turntable in conjunction with the upward movement of the disc playback mechanism section 13. The clamp member 14 is rotated in a direction in which the clamp member 14 is separated from the turntable in conjunction with the lowering movement of the disc playback mechanism section 13.

Here, a motor 11 is attached to the main chassis 11. The rotational force of the motor 17 is transmitted via a gear 18 rotatably supported by the main chassis 11 to a cam gear 19 also rotatably supported by the main chassis 11. This cam gear 19 has a cam portion 20 formed on one side thereof, which requires one or more revolutions of the cam gear 19 to reach the other end from one end, although the details will be described later. Further, the main chassis 11 has a shaft 11c implanted in the main chassis 11, and a drive lever 21 having an abbreviated shape and having a pin 21a at one end that engages with the cam portion 20.
It is rotatably supported.

The other end of the drive lever 21 is connected to the connecting lever 2.
It is rotatably connected to one end of 2. The connecting lever 22 is connected to the drive lever 21 as shown in FIG. b) Middle arrow IE, Fh
They are designed to be rotated in both directions. In addition, a bar 7122a is formed at the other end of the first link 22, and a bin 23a protrudes from one end of the fourth lowering lever 23 into the elongated hole 22a. ing. It! of this storage lever 23! ! The end portion is rotatably connected to the disk reproducing film structure 13.

Here, normally, the dead weight of the disc playback mechanism section 13 is transferred to the drive lever 21 via the lowering lever 23 and the connecting lever 22.
1(a), that is, in the direction in which the pin 21a of the drive lever 21 is pressed against the cam portion 20 of the cam gear 19.

Further, a tooth portion 121 having a zero mesh with the cam gear 19 is formed on the side of each of the disks 1 to 12. This tooth portion 121) is in the state where the disc tray 12 is moved in the direction of arrow B in the figure, that is, the disc h l
The cam gear 19 is not engaged with the cam gear 19 in a state in which the solenoid 12 is completely housed in the gearbox 1 (not shown). Then, the cam gear 19 is rotated in the direction shown in FIG. When the disk 1-lay 12 is pushed out in the direction of the arrow in the figure by pushing 12c, the cam gear 19 meshes with the teeth 12b of the disk tray 12.

Further, in the other direction of the cam gear 19, an arcuate groove 24 corresponding to approximately 3/4 of the circumference of the cam gear 19 is formed as indicated by a dotted line 1 in FIG. Further, a control lever 25 is rotatably supported coaxially with the cam gear 19. The control lever 25 has a pin 25b formed on a protrusion 25a formed at one end thereof, and is loosely fitted into the 1MAl 124 of the cam gear 19.

The protrusion 25a of the control lever 25 is attached to the main chassis 11 and can engage with the movable piece 2t3a of the 17 switch 26. This leaf switch 26 has fixed pieces 26b on both sides of its movable piece 26a.
, 26c, and when the movable piece 26a comes into contact with one of the fixed pieces 261) or 26c, the rotation of the motor 17 is stopped.

The operation of the above configuration will be explained below.

First, when the disk tray 12 is moved in the direction of the arrow in FIG. 1(a), that is, when the disks 1 to 12 are completely stored in the cabinet i, As shown in the figure, the cam gear 19 is not meshed with the teeth 12I of the disk tray 12, and the drive lever 21 has its pin 21a moved counterclockwise in the h1 direction by the cam part 20 of the cam gear 19. In the state in which the disc playback mechanism section 13 is rotated to the maximum, as shown in FIG. 1(b), the disc is replayed. It is designed to be in a state of J.

Nowadays, the l1111 lul+ lever 25 is formed on its protrusion 25a! 251] is the cam gear 1
By being pushed by one end of the groove 24 of 9, the protrusion 25
a is the movable piece 26a of the leaf switch 2+i and the fixed piece 26
1] is moved by 1 to 1.

In this state, if the disks 1 to 12 are moved in the direction of the arrow in FIG. Itta 1
The rotational force 7 is transmitted to the cam gear 19 via the gear 18, and the cam gear 19 is rotated in the pasting direction in the figure. Then, first, as the cam gear 19 rotates, the cam portion 20
By moving the bin 21a along the axis, the drive lever 21 is rotated in the training direction in the figure. Therefore, when the disc playback mechanism section 13 is rotated in the direction of the arrow in FIG. As shown in the figure, the protrusion 10 of the cam gear 19
a presses the protrusion 12c of the disc tray 12, and moves the disc tray 12 in the direction of the arrow in the figure. The cam gear 19 and the teeth 121 of the disk tray 12)
Thereafter, the movement of the disc tray 12 and the lowering operation of the disc reproducing mechanism section 13 are performed together.

At this time, as is clear from FIG.
4, the movable piece 2 of the leaf switch 26
It is stopped while being rotated slightly in the direction shown in the figure by the elastic force of 6a.

Further, in the disk reproducing mechanism section 13, when the cam gear 19 is in a substantially rotated state, its downward movement is performed by steps 1 to 1 (not shown).
It is made to be regulated by the brim. Even after the disk reproducing mechanism section 13 is regulated from its lowered position by the stopper J, the drive lever 21 is still rotated in the cutting direction in FIG. 22, so as to be absorbed by the elongated holes 22a.

In this way, when the cam gear 19 makes one rotation or more, as shown in FIG. The mounting portion 12a completely protrudes outside the cabinet 1 and is in an unloading state. Further, at this time, the control lever 25 is rotated substantially by the pin 25b being pressed against the other end of the groove 24, and then the protrusion 25a moves the movable piece 26a of the leaf switch 26 to the fixed piece 26c. The rotation of the motor 17 is stopped.

Further, during loading, the cam gear 19 is rotated in the opposite direction from the position shown in FIG. 4, contrary to the above. Then, when the cam gear 19 reaches the position shown in FIG.
The disk mill ray 12 is completely stored in the cabinet, loading is performed, and the cam gear 19
When the turntable is rotated further counterclockwise from the position shown in FIG. 3, the disc reproducing mechanism unit causes its turntable to protrude to the upper surface of the main chassis 11, and the disc is then clamped.

Therefore, according to the configuration of the above embodiment, it takes a long time for the cam gear 19 to reach the cam gear 19 from one end to the other end.
Since the cam part 20 that requires one rotation or more of 9 is formed, and the disc playback mechanism part 13 is moved up and down by the action of the cam part 200, even if the diameter of the cam gear 19 is small, sufficient drive can be achieved. can generate force,
This can effectively promote downsizing of the entire disc playback device.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the gist of the above.

[Effect of the invention] Therefore, as detailed above, this invention (accordingly,
The elevating and lowering operations of the disc reproducing mechanism section can be performed by a small drive source, and it is possible to provide an extremely good disc reproducing device that effectively promotes downsizing.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an embodiment of a disc reproducing apparatus according to the present invention, and FIGS. 2 to 4 are configuration diagrams for explaining the operation of the embodiment. DESCRIPTION OF SYMBOLS 11... Main chassis, 12... Disc mill ray, 13... Disc playback structure, 14... Clamp member, 15... Clamp arm, 16... Connection arm, 17... Motor, 18...Gear, 19...
・Cam gear, 20...Cam portion, 21...Drive lever, 22...Connection lever, 23...Elevating lever, 24
...Groove portion, 25...Control lever, 26...Leaf switch.

Claims (1)

[Claims] A disk tray on which a disk is placed, a disk playback mechanism that is supported so as to be able to rise and fall in a direction substantially perpendicular to the disk tray and is capable of playing back the disk placed on the disk tray, and a rotational driving force is transmitted thereto. a rotating body formed with a cam portion that requires one or more rotations to reach from one end to the other end; and a power transmission for raising and lowering the disc playback mechanism along the cam portion of the rotating body. A disc playback device comprising a mechanism.