JP3229478B2 - Disc playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk reproducing apparatus for reproducing a loaded disk or recording a disk.

[0002]

2. Description of the Related Art In recent years, digital recording media such as optical disks and magneto-optical disks have become mainstream as recording media for recording audio information and the like.

In particular, a compact MD (mini-disc) in which information is compressed and recorded on an optical disk or a magneto-optical disk and stored in a resin cartridge is highly convenient, and its spread is expected in the future. By the way.

[0004] Incidentally, along with the development of such recording media, various devices for reproducing the information have been conventionally developed.

For example, an MD player as shown in FIG. 13 is known as a device for reproducing music information recorded on an MD.

[0006] This MD player transmits the power of the main motor to the slide table 3.
The holder 1 loaded with the disc in the base chassis 2
, And the disc is reproduced by the reproducing means mounted on the base chassis 2.

[0007]

However, the M
According to the D player, when the disc is loaded, the holder and the slide table are pushed entirely by the disc and the main motor is operated, so that the pushing force of the disc is heavy and the insertion feeling is bad. there were.

Further, when the disk is carried out, the operation restriction of the lever biased by the spring is removed at a time, so that this lever operates rapidly by the action of the spring, and thus the disk is released by the lever. There is a drawback in that the product is extruded vigorously and the luxury of the product is lost.

[0009]

According to the present invention, the power of a main motor is transmitted to a slide table, and the slide table is used to transfer a holder loaded with a disk to a predetermined position of a base chassis. A disk reproducing apparatus for reproducing the disk by the reproducing means, one end of which is pressed by an end surface of the disk, a lock lever for restricting the return of the lever, and one end of the lock lever which is pressed. A lock release lever for returning the lever is provided so as to be swingable, and a switching lever interlocked with the lock lever is provided, and the switching of the main motor is performed by the switching lever. The object is achieved by providing a disk reproducing apparatus.

[0010] Further, projecting pieces project from upper ends of both side faces of the base chassis, respectively, and one end of the unlocking lever is pressed by one of the projecting pieces, and the other end of the lever immediately after the return is pressed by the other projecting piece. The object is achieved by providing a disk reproducing device characterized by being supported.

[0011]

According to the disc reproducing apparatus of the present invention, when a disc is started to be loaded into the holder, the lever is pushed into the end face of the disc at one end thereof to swing, while the lever is restricted from swinging by the lever. The lever starts swinging, and the lock lever restricts the swinging of the lever.

At the same time, the switching lever interlocks with the lock lever to drive the main motor to rotate forward, so that the slide table moves forward while entraining the holder, and the holder is transferred to a predetermined position on the base chassis. become.

On the other hand, when the main motor is rotated in order to carry out the disc loaded in the holder, the holder is entrained on the slide table and starts to retreat.

When the holder retreats to a predetermined position, one end of the lock release lever collides with the projection piece of the base chassis and is pressed, whereby the lock release lever which starts swinging moves at one end of the lock lever at the other end. Will be pressed.

Then, the lock lever swings, and the swing of the lever whose swing has been restricted by the lock lever starts to return.

Immediately after the start of the return of the lever, the other end collides with the other protruding piece of the base chassis, so that the lever returns slowly in accordance with the retreat speed of the holder, so that the disk is moved by the lever. It will be carried out slowly according to the return speed.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a disk reproducing apparatus according to the present invention will be described below. FIG. 1 shows an in-vehicle MD player as the disk reproducing apparatus.

The housing 10 is a rectangular case made of a synthetic resin or a metal, and has a loading port 12 opened on the front surface thereof, and an eject switch 14 and a reproduction switch 16 arranged below the housing. It is.

On the other hand, a drive unit 20 is provided inside the housing 10, and the drive unit 2
At 0, the disc D inserted into the loading port 12 is pulled in and reproduced.

The disk D is an MD (mini-disc) in which the optical disk d is housed in a resin cartridge e. The shutter f provided in the cartridge e is opened in the drive unit 20 to expose the optical disk d. When the laser beam is irradiated on a part of the laser beam, the reproduction is performed.

FIG. 2 is a schematic front view of a drive unit, which is the heart of the disk reproducing apparatus.

The drive unit 20 generally includes a chassis 30, a base chassis 40, a holder 50, and a slide table 60. The chassis 30 is fixed to a housing via support legs 31,. Are fixed to the base chassis 40 by guide shafts 51,..., And the slide table 60 is fixed to the chassis 30 by guide pins 61a, 61b,.
・ ・ Mounted forward / backward via

The disk D is loaded into a holder 50 as shown by an imaginary line, and is transferred to a predetermined position by the holder 50.

The upper ends of both sides of the chassis 30 are bent outward to form flanges 32, 32.

Next, FIG. 3 is a schematic plan view of the drive unit, and reference numerals 70a and 70b in the figure indicate links.

As is apparent from this figure, the flanges 32, 32 of the chassis 30 are formed with straight guide holes 33, 33 in the longitudinal direction thereof.
Both ends of the slide table 60 are attached to the slide plates 3 and 33 so as to be able to move forward and backward using the guide pins 61a to 61d as described above.

At one end of the slide table 60,
Slots 62a and 62b communicating with one guide hole 33 are formed, and pins 63a and 6b are formed in the slots 62a and 62b.
3b is penetrated, and one end of a swing arm 64 is attached to one of the pins 63b.

The swing arm 64 is pivotally connected to the slide table 60 with a pin 63c. One end of the swing arm 64 is attached to the pin 63b as described above, and the other end is located in a curved hole 62c formed in the slide table 60. Attached to pin 63d.

One end of a slide plate 65 shown by a broken line is attached to the pin 63d.
Is supported by a pin 63e located in a long hole 62d formed in the slide table 60.

On the other hand, the chassis 30 and the slide table 6
0 is linked via links 70a and 70b.

One end of the link 70a is pivotally connected to the flange 32 of the chassis 30 with a pin 63f, and the other end is a pin 63g located in a long hole 62e formed in the slide table 30.
One end of the other link 70b is pivotally connected to one end of the slide table 30 by a pin 63h, and the other end is supported by a pin 63i located in an elongated hole 35 formed in the arm 34 of the chassis 30. .

Next, FIG. 4 is a front view of the base chassis, and FIG. 5 is a plan view of the base chassis.

The base chassis 40 is provided with a turntable 41 and a pickup 42 as reproducing means. The optical disk is sucked and rotated by the turntable 41, and information recorded by the pickup 42 is sequentially read. ing.

The turntable 41 is provided substantially at the center of the base chassis 40, and is rotated by a motor M1 such as a stepping motor.

The pickup 42 is provided with the carriage 4
3 and the carriage 43 is moved forward and backward by a motor M2 such as a stepping motor to perform parallel movement along the disk surface.

That is, the power of the motor M2 is
4d to the feed screw 45, and the feed screw 45
Is engaged with the rack gear 46 fixed to one end of the carriage 43, so that the carriage 43 moves forward and backward along the support shafts 47, 47 penetrating both ends thereof.

As is apparent from FIG. 5, the base chassis 40 is supported at three places by cushions k,... And is connected to the chassis via four springs S1,. Thereby, the impact transmitted to the base chassis 40 is reduced.

Next, FIG. 6 shows the left side of the base chassis,
FIG. 7 shows a right side surface of the base chassis.

As is apparent from FIGS. 6 and 7, two L-shaped guide grooves 48 are formed on both side surfaces of the base chassis 40 in the longitudinal direction, and a portion extending in the horizontal direction is horizontal. A portion extending vertically downward from one end of the horizontal portion 48 is a vertical portion 48b.

The horizontal portion 4 is located below the guide groove 48.
A slit 49 is formed in parallel with 8a.

Also, at predetermined positions of the upper ends on both side surfaces of the base chassis 40, projecting pieces 40a, 40b are respectively provided.
Are protruded (see FIG. 5).

Reference numeral F in the figure is a hook, and one end of each of the springs S1,... (See FIG. 5) is locked to the hook F.

Next, FIG. 8 is a plan view showing the holder, wherein reference numerals 51,... In the figure denote guide shafts, and reference numerals 80, 80 denote guide plates.

As clearly shown in this figure, two guide shafts 51,.
The holders 50 are supported by the base chassis by penetrating the guide shafts 51,... Through the guide grooves of the base chassis (see FIGS. 6 and 7).

Also, guide plates 80, 80 are attached to the guide shafts 51,... As shown in the figure, and flange portions 81, 81 projecting from the lower ends of the guide plates 80, 80 are provided on the base chassis. 40 slits 49,
49 (see FIGS. 6 and 7).

On the upper surface of the holder 50, a lever 52, a lock lever 53, and a lock release lever 54 are swingably mounted as shown in the figure.

The lever 52 is a metal plate having a U-shape, and has a central portion provided with a pin P1 on the upper surface of the holder 50.
At one end and a tension coil spring S at one end.
2, the other end side is swingably supported by a pin P2 located in a curved groove 52a.

Projecting pieces 52b and 52c project vertically upward from one end of the lever 52, and a projecting piece 52d project vertically downward from the lever 52, and the other end extends horizontally. A protruding piece 52e is provided.

One end of the extension coil spring S2 is
2b, the other end is locked by a protruding piece 50a protruding from the opening R side of the holder 50.

On the other hand, the lock lever 53 is a U-shaped metal plate, the center of which is pivotally attached to the upper surface of the holder 50 by a pin P3, and the one end of which is protruded vertically upward. 53c, and projecting pieces 53a, 53b on the other end side.
Is protruding.

A torsion coil spring S3 is fixed to the pin P3. One end of the torsion coil spring S3 is fixed to the projecting piece 53a, and the other end is fixed to the projecting piece 50b projecting from the upper surface of the holder 50. The other end of 53 is urged in the direction of the lever 52.

On the other hand, the lock release lever 54 is a metal plate having a substantially "A" shape, one end of which is a protruding piece 54b, and a portion extending obliquely from the center portion is a protruding piece 54a.
It has been.

The lock release lever 54 has a central portion pivotally attached to the upper surface of the holder 50 by a pin P4, and the other end is urged toward the lock lever 53 by a tension coil spring S4.

One end of the extension coil spring S 4 is engaged with a projecting piece 50 c projecting from the holder 50, and the other end is engaged with a small hole 54 c opened at the other end of the lock release lever 54.

When no disk is loaded in the holder 50, the lever 52, the lock lever 5
3 and the lock release lever 54 are in the state shown by the solid line, respectively, and the lever 52 restricts the swing of the lock lever 53.

However, when a disk is loaded, the lever 52 and the lock lever 53 swing to the positions indicated by imaginary lines.

That is, when the loading of the disk is started from the direction of the opening R, the protruding piece 52 at one end of the lever 52 is held at its end face.
d (see FIG. 2) is pushed in, and the lever 52 swings to the position indicated by the imaginary line, while the lock lever 53 whose swing is restricted by the lever 52 starts swinging to the position indicated by the imaginary line. The lock lever 53 is reversed to the lever 52
Rocking and returning.

At the same time, a switching lever, which will be described later, is linked to the lock lever 53 via the swing arm 64 and the slide plate 65 (see FIG. 3), so that the main motor starts.

That is, when the lock lever 53 starts swinging, the swing arm 64 and the slide plate 65 whose swing is restricted by the lock lever 53 operate, and the switching lever interlocks with the swing arm 64 as described later. The main motor is switched.

The disc loaded in the holder 50 is provided with leaf springs S5, S fixed on both sides of the holder 50.
5 is held.

Next, FIG. 9 shows the right side of the drive unit, and FIG. 10 shows the left side of the drive unit.

As is apparent from FIG.
A switching lever 66 is fixedly provided at the tip of each of a and 63b (see FIG. 3). The switching lever 66 and the guide pin 61c are connected to each other by an elastic member S6 such as a tension coil spring.

Therefore, the switching lever 66 is biased rightward in FIG. 9 and the swing arm 64 is
3 and the slide plate 65 is urged leftward in FIG.

On the other hand, as is apparent from FIG.
Detectors E and E 'such as microswitches are fixed to the side of the
6 is detected, a main motor to be described later is stopped.

Normally, the switching lever 66 is located at the position shown in FIG.

For this reason, although the main motor is in a stopped state,
When the disc is loaded, as described above (see FIG. 8), the swing regulation of the swing arm 64 and the slide plate 65 is released, and the switching lever 66 is pulled rightward in FIG. 9 by the action of the elastic member S6. As a result, the detector E and the switching lever 66 are brought out of contact, and the main motor is driven until the switching lever 66 comes into contact with the other detector E '.

The main motor M shown in FIG. 10 is fixed on the side of the chassis 30 opposite to the detectors E and E ', and its power is transmitted through a reduction gear train. The power is transmitted to the rack 67 via the rack 67.

The reduction gear train includes a worm 90 fixed to the drive shaft of the main motor M, a large gear 91a and a small gear 91b.
91 (worm wheel) with gears, large gear 92a
A worm 90 and a large gear 91a, a small gear 91b and a large gear 92a, and a small gear 92 and a small gear 92b.
b and gear 93, gear 93 and gear 94, and gear 9
4 and the rack 67 are engaged with each other.

The rack 67 is provided on the flange 3 of the chassis 30.
2 are fixed to the tips of guide pins 61b and 61d (see FIG. 3) penetrating through the slide table 60 when the power of the main motor M is transmitted to the rack 67.
Along the guide holes 33, 33 (see FIG. 3).

As shown in FIGS. 9 and 10 (or FIG. 2), the slide table 60 has hooks 68 on both sides of the front end in the traveling direction, and hooks 69 on both sides of the rear end. , 69 project vertically downward, and the hooks 69, 69 move forward when the guide shafts 51,
51 is pressed, and the hooks 68, 68 press the front end of the guide plate at the time of retreat.

Next, FIG. 11 shows a side view of the guide plate.

As is apparent from this figure, two inclined grooves 84 having an inclination angle of about 45 degrees are formed on the side surface of the guide plate 80 in the direction of the vertical portion 48b of the guide groove 48. The guide shafts 51,... Penetrate the inclined grooves 84, 84.

The guide plate 80 has a projection 8
5 is protruded, and the protruding piece 85 and one of the guide shafts 51 are provided.
Are connected to each other via an elastic member S7 having a tensile property such as a tension coil spring.

Next, FIG. 12 is an enlarged view showing an attached state of the guide plate, and reference numeral 86 in the figure denotes a sleeve made of synthetic resin or the like.

As can be seen in this figure, the guide plates 80, 80 are adjacent to both sides of the base chassis 40, and in particular, the base plates 40 are provided with sleeves 86,. It is closely attached to the side surface of the chassis 40.

Next, the operation of the disc reproducing apparatus according to the present invention will be described. As shown in FIG.
2, the disc D is loaded into the holder 50 of the drive unit 20 as shown in FIG.

At this time, the projecting piece 52 d
Is pushed, whereby the lever 52 and the lock lever 53 shown in FIG. 8 swing to the position shown by the imaginary line, and simultaneously the swing arm 64 swings counterclockwise in the figure and the slide plate 65 swings leftward in the figure. I do.

At this time, the switching lever 66 shown in FIG. 9 comes out of contact with the detector E, and thus the main motor M shown in FIG.

Then, when the slide table 60 starts to move forward, and thereafter the switching lever 66 shown in FIG. 9 contacts the detector E ', the slide table 60 stops together with the main motor M.

When the slide table 60 is moving forward, the guide shaft 51 is connected to the hooks 69, 69 shown in FIGS.
1, the holder 50 (not shown in FIGS. 9 and 10) integrated with the guide shaft 51 also moves forward.
The guide plate 80 shown in FIG. 1 is also pushed forward by the guide shaft 51 and moves forward.

After that, the guide shaft 51 is
At this time, the guide shaft 51 is inclined by the action of the elastic member S7.
Gently descends while closely adhering to the slopes.

The holder integrated with the guide shaft 51 is pressed down by the guide plates 80, 80. As a result, the transferred disk is fixed at a fixed position of the base chassis 40. Ready for playback.

When the guide shafts 51,... Descend, the guide plates 80, 80
Since the downward movement is restricted by the slits 49, 49, the movement is performed only in the horizontal direction.

On the other hand, the eject switch 14 shown in FIG.
When the key is pressed, the main motor M shown in FIG. 10 rotates in the reverse direction, and the slide table 60 starts retreating.

Then, the hooks 68 of the slide table 60 are moved to the front end 8 of the guide plate 80 shown in FIG.
0a is pressed, and this is carried out.

Then, the guide shaft 51 of the holder is pushed up by the inclined grooves 84, 84 of the guide plate 80, and as a result, the holder is detached from the base chassis 40.

Further, as the slide plate 60 continues to retreat, the guide plate 80 is moved by the slide table 60 and the holder is moved by the inclined grooves 84, 84 of the guide plate 80.
When the guide shafts 51 and 51 are pushed at 84, the guide shafts 51 are retracted, and each stops when the switching lever 66 shown in FIG.

During the retreat of the holder, the unlocking lever 54 shown in FIG. 8 has its protruding piece 54b provided at one end thereof collided with the protruding piece 40b of the base chassis 40 and is pressed.
It swings in the counterclockwise direction in FIG.
4a pushes a protruding piece 53c provided at one end of the lock lever 53, and swings the lock lever 53 clockwise in the drawing.

Then, the lever 52 is moved to the lock lever 5
3 is released, and returns to the position shown by the solid line.

For this reason, the disc is pushed by the projecting piece 52d and is carried out of the holder 50.
A projecting piece 52 provided at the other end immediately after the start of the return of the lever 52
The disc e is gently carried out in accordance with the traveling speed of the holder 50 because e is colliding with the projecting piece 40a of the base chassis 40 and is supported.

According to the above embodiment, a reproduction-only MD using an optical disk as a disk is exemplified. Of course, a reproduction / recording MD using a magneto-optical disk as the disk, and an optical disk as an optical disk are also used. Application as a reproducing apparatus for a CD (compact disk) or a magnetic tape type is also possible.

[0092]

Since the disk reproducing apparatus of the present invention is configured as described above, the following effects can be obtained.

(1) The disc reproducing apparatus of the present invention has a lever whose one end is pressed by the end face of the disc, a lock lever for restricting the return of the lever, and a press of one end of the lock lever to return the lever. And a switching lever interlocking with the lock lever is provided, and the switching of the main motor is performed by the switching lever, thereby lightly pushing the disk. This makes it possible to perform the loading only by itself, which brings about a special effect that the feeling of inserting the disc becomes very good.

(2) Further, projecting pieces are respectively provided at the upper ends of both sides of the base chassis, and one end of the unlocking lever is pressed by one of the projecting pieces, and the other projecting piece is used by the other lever immediately after the return. By supporting the end, the lever can be returned gently, and the disc can be pushed out gently by the lever, which is an excellent effect that the quality of the product is greatly improved. To play.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a disk reproducing apparatus according to the present invention.

FIG. 2 is a schematic front view showing an internal mechanism of the disk reproducing apparatus.

FIG. 3 is a schematic plan view showing an internal mechanism of the disk reproducing apparatus.

FIG. 4 is a front view showing a base chassis constituting an internal mechanism of the disk reproducing apparatus.

FIG. 5 is a plan view showing a base chassis constituting an internal mechanism of the disc reproducing apparatus.

FIG. 6 is a left side view showing a base chassis constituting an internal mechanism of the disc reproducing apparatus.

FIG. 7 is a right side view showing a base chassis constituting an internal mechanism of the disk reproducing apparatus.

FIG. 8 is a plan view showing a holder constituting an internal mechanism of the disk reproducing apparatus.

FIG. 9 is a right side view showing an internal mechanism of the disk reproducing apparatus.

FIG. 10 is a left side view showing an internal mechanism of the disk reproducing apparatus.

FIG. 11 is a side view showing a guide plate provided in an internal mechanism of the disk reproducing apparatus.

FIG. 12 is an enlarged view showing an attached state of the guide plate.

FIG. 13 is a schematic perspective view showing an internal mechanism of a conventional disk reproducing apparatus.

[Explanation of symbols]

 D Disk M Main motor 10 Housing 20 Drive unit 30 Chassis 40 Base chassis 40a, 40b Projecting piece 41 Turntable 42 Pickup 50 Holder 51 Guide shaft 52 Lever 53 Lock lever 54 Unlock lever 60 Slide table 66 Switching lever

Claims (2)

(57) [Claims] 1. The power of a main motor is transmitted to a slide table, and a holder on which a disk is loaded is transferred to a predetermined position of a base chassis by the slide table, and the disk is reproduced by reproducing means provided on the base chassis. A lever whose one end is pressed by the end face of the disk, a lock lever that regulates the return of the lever, and a lock release lever that presses one end of the lock lever to return the lever And a switching lever interlocking with the lock lever, and the switching of the main motor is performed by the switching lever. 2. A projecting piece is provided on each of the upper ends of both sides of the base chassis, and one end of the unlocking lever is pressed by one of the projecting pieces, and the other end of the lever immediately after the return is pressed by the other projecting piece. 2. The disc reproducing apparatus according to claim 1, wherein the disc reproducing apparatus is supported.