JP4285328B2 - Disk unit - Google Patents

Description

The present invention relates to a disk device for reproducing, recording, or erasing a disk such as a DVD, and more particularly, to absorb vibrations of a tray during high-speed rotation of the disk.

Conventionally, there is a disk device shown in FIG. This is a DVD-type disk device, and a synthetic resin loader chassis 2 is fixed to a substantially central portion in the outer casing 1,
A pedestal 2c is formed inside both side walls 2a of the loader chassis 2, and the tray 3 is engaged with a pair of left and right guide members 2d projecting on the cradle 2c in the forward and backward movements a and b (see FIG. 13). ), A plurality of tray lifting prevention pieces 2b are integrally projected on the inner peripheral surfaces of both side walls 2a of the loader chassis 2 so as to face both sides of the tray 3, and face the tray 3 on the front panel of the outer casing 1. An opening 1a is formed, a turntable 4 and an optical pickup 5 are provided in a drive chassis (not shown) that can move up and down below the tray 3, and an input for a control device provided on the side of the loader chassis 2 The connector 6 is connected to the power connector 9 provided on the AV board 8 behind the loader chassis 2 via the lead wire 7, and the control device output connector 10 provided on the rear part of the loader chassis 2 is connected to the cable. Via Le 11 is connected to the back-end substrate 12 connector for video apparatus provided on (connector information processing device) 13 of the side of the main chassis 2.

In the above configuration, a power source is connected to a control device (not shown) via the lead wire 7, and the drive chassis is moved up and the disk D on the tray 3 is lifted by the turntable 4 by the drive control of the control device. The disk D is rotated at a high speed by the turntable 4, the information recorded on the disk D is read by the optical pickup 5, and the read information signal is transmitted to the video equipment via the cable 11, whereby the monitor Play, record, or delete video.

According to the above configuration, the vibration generated by rotating the disk D at a high speed is transmitted to the tray 3, and the tray 3 vibrates up and down, left and right, and generates unpleasant noise.

There exists what was described in patent document 1 as a technique which eliminates the said difficulty. As shown in FIG. 13, a pair of left and right leaf springs 23 are fixed on the cradle 2c so as to face both sides of the tray 3, and the tray 3 is moved forward as shown by a solid line in FIG. By b, the arc portion 23a of the leaf spring 23 is brought into contact with the lower surface of the tray 3, and the tray 3 is pressed against the tray lifting prevention piece 2b by the urging force to absorb the vibration of the tray 3.
JP 11-339350 A

In the above conventional configuration, the vibration of the tray 3 is absorbed by the pair of left and right leaf springs 23. In this case, the number of parts is increased by using both leaf springs 23.
The fixing work of 3 takes time and labor, and the production cost is high.

An object of the present invention is to provide a disk device that reliably absorbs vibrations of a tray with an inexpensive and simple structure in view of the above-described conventional drawbacks.

In order to achieve the above object, according to the first aspect of the present invention, a pedestal is formed inside both side walls of the loader chassis, and the tray can be moved forward and backward by a pair of left and right guide members protruding on the pedestal. The tray lift prevention piece is integrally projected on the inner peripheral surface of both side walls of the loader chassis so as to face both side portions of the tray, and a turntable and an optical pickup are provided below the tray. In the disc apparatus in which the disc on the tray is lifted by a turntable after the tray has been moved forward, the disc is rotated at a high speed by the turntable, and information recorded on the disc is read by an optical pickup. A strip that is elastically displaceable substantially along the forward and backward direction is integrally provided on the lower rear surface of the tray, and the rear of the strip is laterally directed toward the reverse side. An inclined plate portion that is slightly inclined, a roll prevention pin projects from the cradle facing the band plate, a shielding plate that covers the rear upper surface of the loader chassis is provided, and a rear edge of the shielding plate is provided. An elastically displaceable pressing plate that extends diagonally downward and faces the rear edge of the tray is integrally provided, and by moving the tray backward, the inclined plate portion of the belt plate comes into contact with the roll prevention pin. It causes, in the form so as to contact with the plate holding the rear edge of the tray
And four legs are integrally projected at predetermined intervals in the forward and backward direction at both side edges of the lower surface of the shielding plate.
The two legs on the front side are slightly inclined outwardly to the forward side, and protrude to the forward side at the tip.
The hook part is integrally formed, and the two rear legs are slightly inclined outwardly to the reverse side.
A hook part protruding backward is integrally formed at the tip of the lever, and both side walls of the loader chassis
A longitudinal groove for inserting each leg portion is formed on the rear outer peripheral surface of the rear portion, and communicated with each longitudinal groove.
Lateral grooves for releasably engaging the hook portions are formed.
By inserting the hooks into the vertical grooves and engaging the hooks with the horizontal grooves, the shield plate is attached to the loader chassis.
It is characterized by being fixed to the rear part .

According to a second aspect of the present invention, in the first aspect of the present invention, the pressing plate has a predetermined interval.
A pair of left and right is provided .

The invention described in claim 1 corresponds to the first embodiment (see FIGS. 1 to 9), and according to this, vibration generated by rotating the disk at high speed is transmitted to the tray. The tray tends to vibrate up, down, left and right, but at this time, the inclined plate portion of the elastically displaceable strip integrally protruding on the lower surface of the rear portion of the tray protrudes on the pedestal of the loader chassis. Since it is in contact with the prevention pin, the roll of the tray is prevented and the trailing edge of the tray is in contact with the elastically displaceable holding plate integrally projecting on the shield plate on the loader chassis. Thus, it is possible to provide a disk device that can absorb the vibration of the tray reliably and is excellent in noise reduction.

In addition, the hook part integrally formed on the two legs on the front side protrudes toward the forward side,
The hook part formed integrally with the two legs on the rear side protrudes toward the reverse side, and the distance between the hook parts facing each other along the forward / backward direction is widened. It can be fixed more stably.

Furthermore, since each leg is slightly inclined so as to spread outwardly, the leg is pressed against the inner surface of each vertical groove so that the shield plate does not vibrate unexpectedly by driving a turntable or an optical pickup. Can be fixed integrally to the loader chassis.

Moreover, since the pressing plate is integrally projected on the shielding plate for wiring the lead wire and cable, the number of parts does not increase by adding the pressing plate, compared with the case of using a conventional leaf spring. Production costs can be reduced.

According to the second aspect of the present invention, the vertical swing of the tray can be more reliably prevented by bringing the rear end edges of the both side portions of the tray into contact with a pair of left and right pressing plates provided at a predetermined interval. .

1 to 5 show a DVD type disk apparatus according to a first embodiment of the present invention, in which a synthetic resin shielding plate 15 covering the rear upper surface of the loader chassis 2 is provided and the shielding plate. A plurality of locking pieces 16 for locking the lead wire 7 and the cable 11 to the upper surface of 15.
A and the reinforcing frame 16B are integrally projected, and a roll prevention mechanism 25 and a pitch prevention mechanism 26 are provided. In FIG. 2, reference numeral 14 denotes a printed circuit board locked to the lower part in the loader chassis 2, on which an input connector 6 and an output connector 10 for a control device are arranged. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 12 and 13, the same reference numerals are given to the same portions, and the description thereof is omitted.

The shielding plate 15 is made of a rectangular plate, and has four leg portions 15A to 15D integrally projecting at predetermined intervals in the forward and backward a and b directions at both side edges of the lower surface, and the two front leg portions 15A. , 15B
A hook portion 15a is integrally formed from the front end to the forward side, and a hook portion 15a is integrally formed from the front ends of the two rear leg portions 15C and 15D to the reverse side.
), The two legs 15A and 15B on the front side are moved forward by a predetermined angle α (for example, 1 to 5 °).
) Slightly inclined outwardly and the two rear legs 15C and 15D are slightly inclined outwardly by a predetermined angle α (for example, 1 to 5 °) toward the reverse side.

As shown in FIGS. 6 and 7, vertical grooves 17 for inserting the respective leg portions 15 </ b> A to 15 </ b> D are formed on the rear outer peripheral surfaces of the side walls 2 a of the loader chassis 2, and communicated with the vertical grooves 17. Then, a lateral groove 18 is formed for engaging each hook portion 15a so as to be detachable. As shown in FIG. 6 (a), positioning holes 19 are provided through both side edges of the shielding plate 15,
Positioning projections 2 on the upper surfaces of both side walls 2a of the loader chassis 2 facing the shell positioning holes 19
0 is integrally projected.

The assembly procedure will be described. As shown in FIGS. 6 (a) and 7 (a), the shielding plate 15 is grasped and lowered from the rear upper part of the loader chassis 2 to obtain FIGS. b)
As shown in FIG. 2, the leg portions 15A to 15D are inserted into the longitudinal grooves 17 and the two leg portions 1 on the front side thereof are inserted.
The front surface 15b of 5A, 15B is pressed against the front inner side surface 17a of the front vertical groove 17, and the rear surface 15c of the two rear legs 15C, 15D is pressed against the rear inner side surface 17b of the rear vertical groove 17, The positioning holes 19 are fitted into the positioning projections 20, the hook portions 15 a are fitted into the horizontal grooves 18, and the hook portions 15 a are engaged with the lower end corner portions 21 of the inner side surfaces 17 a and 17 b.

Subsequently, as shown in FIG. 1, the lead wire 7 having one end connected to the input connector 6 is connected to the shielding plate 1.
5, the other end of the lead wire 7 is connected to the power connector 9, and the cable 11 having one end connected to the output connector 10 is turned on the shielding plate 15. Then, the other end of the cable 11 is connected to the video equipment connector 13 after being locked to the locking piece 16A.

According to the above configuration, the lead wire 7 and the cable 11 are wired at the shortest distance through the upper portion of the loader chassis 2 using the shielding plate 15 and the respective locking pieces 16A. The leads a and b are not obstructed, and the lead wires 7 and cables 11 that are shorter than conventional ones can be reduced in cost, and the leads that are shortened. Noise is hardly transferred to the line 7 and the cable 11, and the recording / playback function can be greatly improved.

Four leg portions 15 </ b> A to 15 </ b> D projecting from the shielding plate 15 are connected to the vertical grooves 1 of the loader chassis 2.
7, the shield plate 15 is locked to the loader chassis 2 so as not to move unexpectedly along the forward and backward a and b directions and the left and right directions c and d perpendicular to the forward and backward a and b directions. At the same time, by engaging the hook portions 15a projecting at the tips of the leg portions 15A to 15D with the respective lateral grooves 18, the shield plate 15 can be reliably fixed so as not to be unexpectedly lifted and removed from the loader chassis 2.

A hook portion 15a integrally formed with the two front leg portions 15A and 15B protrudes toward the forward movement a side, and a hook portion 15 integrally formed with the two rear leg portions 15C and 15D.
hook part 1 in which a protrudes toward the reverse b side and faces along the forward and backward a and b directions
Since the interval L between the 5a (see FIG. 6A) is wide, the shielding plate 15 can be more stably and more securely fixed to the loader chassis 2.

Further, as shown in FIG. 6 (a), the leg portions 15A to 15D are slightly inclined outwardly, so that the leg portions 15A to 15D are pressed against the inner side surfaces 17a and 17b of the vertical grooves 17. Thus, the shielding plate 15 can be integrally fixed to the loader chassis 2 so as not to be vibrated unexpectedly by driving the turntable 4 or the optical pickup 5.

As shown in FIGS. 5 and 8, the roll prevention mechanism 25 includes an elastically displaceable belt plate 25 </ b> A integrally projecting on the lower surface of the rear portion of the tray 3 substantially along the forward and backward a and b directions, An inclined plate portion having a roll prevention pin 25B projecting on the cradle 2c so as to face the plate 25A, and the rear portion of the strip plate 25A is inclined by a predetermined angle β (for example, 1 to 5 °) toward the reverse b side. 25a.

As shown in FIGS. 5 and 9, the pitching prevention mechanism 26 has an elastically displaceable pressing plate 26 </ b> A integrally projecting from the rear end edge of the shielding plate 15, and the pressing plate 26 </ b> A is on the reverse b side. It extends obliquely downward and faces the rear edge 3a of the tray 3.

The vibration absorption procedure will be described. As shown in FIGS. 8 and 9, the tray 3 is moved forward (FIG. 8A).
When the tray 3 is moved forward b from FIG. 9 (a)], as shown in FIG. 8 (b), the inclined plate portion 25a of the band plate 25A comes into contact with the roll prevention pin 25B [FIG. In addition, the rear edge 3a of the tray 3 is brought into contact with the pressing plate 26A [see FIG. 9B].

According to the above configuration, the vibration generated by rotating the disk D at a high speed is transmitted to the tray 3, and the tray 3 tends to vibrate up and down, left and right. Since the inclined plate portion 25a of the elastically displaceable band plate 25A is in contact with the roll prevention pin 25B, the roll of the tray 3 is prevented and the rear edge 3a of the tray 3 is integrated with the shielding plate 15. Since the protruding elastically-displaceable holding plate 26A is brought into contact, the vertical swing of the tray 3 is also prevented, thereby reliably absorbing the vibration of the tray 3 and providing a disk device excellent in noise reduction. be able to.

In addition, since the holding plate 26A is integrally projected on the shielding plate 15 for wiring the lead wire 7 and the cable 11, the number of parts does not increase by adding the holding plate 26A, and the conventional leaf spring 23 is provided. The manufacturing cost can be reduced compared to the case of using (see FIG. 13).

In the first embodiment, one holding plate 26A is used as the pitching prevention mechanism 26. However, as shown in FIGS. 10 (a) and 10 (b), the holding plate 26A is left and right with a predetermined interval. One pair may be used, and according to this, the vertical swing of the tray 3 can be more reliably prevented by bringing the rear end edges 3a of the both side portions of the tray 3 into contact with the both pressing plates 26A (second second). Embodiment).

In the first and second embodiments, the roll prevention mechanism 25 is a combination of the band plate 25A and the roll prevention pin 25B. In addition to this, FIG. 11A and FIG. As shown in FIG. 4B, the side surface of the loader chassis 2 that protrudes integrally with the rear end edge extends obliquely rearward toward the center of the loader chassis 2 and faces the rear end edge 3a of the tray 3. An anti-sway plate 25C may be used, and according to this, the trailing edge 3a of the tray 3 is moved to the side anti-sway plate 25C.
Can be more reliably prevented from rolling (see reference).
Example)

1 is a plan view showing a DVD type disk device according to a first embodiment of the present invention. It is the same side view. It is the same rear view. It is the same perspective view. It is the same exploded perspective view. (A) is the longitudinal cross-sectional view of the principal part before shielding plate fixation, (b) is the longitudinal cross-sectional view of the principal part after shielding plate fixation. (A) is the cross-sectional view of the principal part before shielding plate fixation, (b) is the cross-sectional view of the principal part after shielding plate fixation. (A) is a plan view of the main part in the middle of the reverse movement of the tray, and (b) is a plan view of the main part in the rearward movement of the tray. (A) is a longitudinal cross-sectional view of the main part in a state where the tray is moving backward, and (b) is a vertical cross-sectional view of the main part in a state where the tray is moved backward. (A) is the perspective view of the principal part which shows the DVD type disc apparatus which is the 2nd Embodiment of this invention, (b) is a top view of the principal part. (A) is the perspective view of the principal part which shows the DVD type disc apparatus which is a reference example , (b) is a top view of the principal part. It is a schematic plan view which shows a prior art example. It is a longitudinal cross-sectional view of the principal part.

Explanation of symbols

2 Loader Chassis 2a Side Wall of Loader Chassis 2b Tray Lift Preventing Piece 2c Receiving Base 2d Guide Member 3 Tray 4 Turntable 5 Optical Pickup 6 Control Device Input Connector 7 Lead Wire 9 Power Supply Connector 10 Control Device Output Connector 11 Cable 13 Video Device connector 15 Shield plate 15A to 15D Leg portion 15a Hook portion 16A Locking piece 17 Vertical groove 17a, 17b Inner side surface of vertical groove 18 Horizontal groove 23 Leaf spring 25A Band plate 25a Tilt plate portion 25B Roll prevention pin 25C Roll prevention plate 26A Holding plate a, b Back and forth D Disk

Claims (2)

A cradle is formed inside both side walls of the loader chassis, and the tray is engaged with a pair of left and right guide members projecting on the cradle so that the tray can be moved forward and backward. A tray lifting prevention piece is integrally projected on the inner peripheral surface of both side walls, and a turntable and an optical pickup are provided below the tray. After the tray is moved forward, the disk on the tray is turned on the turntable. In the disk device in which the disk is lifted at a high speed and the disk is rotated at a high speed by the turntable and the information recorded on the disk is read by the optical pickup, the rear lower surface of the tray can be elastically displaced substantially along the forward / backward direction. The band plate is integrally protruded, and the rear part of the band plate is an inclined plate part slightly inclined sideways toward the reverse side. A roll prevention pin is provided on the base, and a shielding plate is provided to cover the rear upper surface of the loader chassis. The rear end edge of the shielding plate extends obliquely downward and can be elastically displaced to face the rear end edge of the tray. A pressing plate is integrally protruded so that the inclined plate portion of the belt plate is brought into contact with the roll prevention pin and the trailing edge of the tray is brought into contact with the pressing plate by moving the tray backward. Formed at predetermined intervals in the forward / backward direction on both side edges of the lower surface of the shielding plate
The four legs are projected in one piece, and the two legs on the front side are slightly inclined outwardly to the forward side.
A hook part that is inclined and protrudes forward is integrally formed at the tip, and the two legs on the rear side are rear
A hook part that is slightly inclined outwardly to the forward side and protrudes backward is integrally formed at the tip thereof.
A vertical groove for inserting each leg is formed on the rear outer peripheral surface of the both side walls of the loader chassis.
In addition, there is a lateral groove that communicates with each of the longitudinal grooves and removably engages the hook portions.
Each leg is inserted into each longitudinal groove and each hook is engaged with the lateral groove.
The disc device is characterized in that the shielding plate is fixed to the rear part of the loader chassis . A pair of left and right pressing plates are provided at predetermined intervals.
The disk device described .

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