JP4186867B2 - Disk unit - Google Patents

Description

The present invention relates to a disk <br/> equipment for performing e.g. disc playback or recording or erasing of such DVD.

An example of a disk device is shown in FIGS. This is because the tray 3 is disposed in the main chassis 2 in the casing 1 so that the tray 3 can move forward and backward, and a disk D placement recess 4 is formed at the center of the upper surface 3 a of the tray 3. By connecting the rear end portion of the drive chassis 5 to the rear portion 2a of the main chassis 2 via an elastic body 6a such as rubber, and connecting the front end portion of the drive chassis 5 to the elevating member 7 via the elastic body 6b. The drive chassis 5 is formed so as to be movable up and down e and f around the rear elastic body 6a.
The cam shaft 8 projecting from the cam is engaged with the cam groove 9a of the cam plate 9 disposed on the front portion 2b of the main chassis 2 so as to be movable in the left and right directions c and d orthogonal to the forward and backward a and b directions. Chassis 5
Further, a spindle motor 11 with a turntable 10 and an optical pickup 12 that can be moved in the disk radial direction by a feed motor 13 are arranged, facing a rack 14 formed on the lower surface of the tray 3, and placed on the front portion 2b of the main chassis 2. A pinion 15 is disposed, and a loading motor 16 for driving the pinion 15 and the cam plate 9 via an interlocking mechanism (not shown) is provided on the front portion 2b of the main chassis 2. In addition, 17 is a disk holder with a magnet which is arranged on the top plate portion 2c on the main chassis 2 so as to be movable up and down within a certain range so as to face the turntable 10, and 18 is a printed circuit board.

The ejecting operation will be described. When the eject button is pushed from the state shown by the solid line in FIG. 7, the optical pickup 12 is moved to the standby position by the feed motor 13 based on the eject signal, and then the loading motor 16 is driven forward. As a result, the cam plate 9 is moved in the direction of the arrow c, and the drive chassis 5 is moved downward about the rear elastic body 6a via the cam groove 9a, the cam shaft 8 and the elevating member 7, whereby the disk D is moved to the tray. 3, the turntable 10 is lowered below the tray 3, and then the tray 3 is slightly moved forward a to engage the rack 14 with the pinion 15, and the pinion 15 is driven to rotate forward. The tray 3 is advanced a through the tray insertion opening 1a of the casing 1 (see the phantom line in FIG. 7), and the tray 3 is removed from the recessed portion 4 of the tray 3 in the most advanced a state. After the disc D is taken out or a new disc D is placed in the recess 4 and then the eject button is pressed, the tray 3 is driven backward by the reverse rotation of the loading motor 16 based on the eject signal. The chassis 5 is moved up and the disk D on the recess 4 is lifted by the turntable 10 (see the solid line in FIG. 7).

Subsequently, the disk D is rotated at a high speed by the spindle motor 11 via the turntable 10, and the optical pickup 12 is moved along the radial direction of the disk by the feed motor 13, thereby being recorded on the disk D by the optical pickup 12. Play, record, or erase information.

According to the above configuration, during the operation of the optical pickup 12, the inside of the casing 1 becomes hot due to heat radiation from the optical pickup 12, the motors 13 and 16, and the heat radiation components such as IC parts on the printed circuit board 18. Then, there is a possibility that the inside of the casing 1 will be in a higher heat state due to the downsizing and thinning of the disk device, and the electrical components may be thermally destroyed.

Conventionally, there is a technique described in Patent Document 1 as a technique for solving the above-mentioned difficulties. This is shown in FIG.
As shown by phantom lines, a large number of slit holes 20 are formed on the inner surface of the concave portion 4 of the tray 3, and the air flow A generated by the high-speed rotation of the disk D is guided to each slit hole 20, and the air flow A
To cool the heat dissipation component.
JP-A-8-339678

In the above-described conventional configuration, the disk D is inserted into the turntable 10 while the optical pickup 12 is in operation.
Since the air flow A generated by the high-speed rotation of the disk D flows mainly along the upper surface 3a of the tray 3, the air flow A induced in each slit hole 20 is small, and cooling of the heat radiating components is performed. Small effect.

Therefore, it is considered that the casing 1 is provided with a cooling mechanism such as a cooling fan.
This complicates the structure and increases production costs.

The present invention aims to propose a disc equipment which can be the light of the conventional disadvantages, to effectively cool the heat radiation member with a simple structure.

In order to achieve the above object, the invention according to claim 1 is arranged such that the tray is disposed in the main chassis in the casing so as to be able to move back and forth, and a disk mounting recess is formed in the center of the upper surface of the tray.
A drive chassis below the tray is attached to the main chassis so as to be movable up and down, and a spindle motor with a turntable and an optical pickup movable in the radial direction of the disk by a feed motor are disposed on the drive chassis. A loading motor for driving the chassis is provided on the main chassis. After the tray is moved forward by the forward drive of the loading motor from the state where the tray is housed in the casing, the tray is moved forward. The disk is taken out from the recessed portion of the tray in the advanced state or a new disk is placed in the recessed portion, the tray is moved backward by the reverse rotation of the loading motor, the drive chassis is moved up, and the disk on the tray is turned. Lift and spin on table In the disk device in which the disk is rotated at a high speed through a turntable by a motor, a plurality of vent holes are formed at both front and rear end portions of the upper surface of the tray so as to surround the recesses, and the outer side of the vent holes. A guide plate is erected along the side edge of each vent hole, and each guide plate is set higher than the front plate portion of the tray by a predetermined interval.
It is attached to the tray so that it can be tilted up and down, and each guide plate is always kept upright by a spring.
The air flow accompanying the high-speed rotation of the disk is guided into each vent hole along each guide plate , and each guide plate hits the tray insertion port of the casing and falls against the spring, thereby falling down the tray.
It is characterized by passing through the insertion port .

The invention according to claim 1 corresponds to one embodiment (see FIG. 6) , and according to this, a plurality of vent holes are formed so as to surround the concave portions at both front and rear end portions of the upper surface of the tray. And
A guide plate is erected along the side edge of each vent hole outside each vent hole, and each guide plate faces the disc lifted by the turntable. The air flow that is generated and flows along the top surface of the tray strikes each guide plate and is guided into each vent hole, where each guide plate is particularly high and passes through a relatively high position from the top surface of the tray.
The air flow to be surely grasped by each guide plate and guided into each vent hole, and the heat flow components such as the optical pickup below the tray can be efficiently cooled by the induced air flow,
It is possible to cope with the downsizing and thinning of the disk device.

Further, since each guide plate hits the tray insertion port of the casing and falls against the spring and passes through the tray insertion port, each guide plate does not hinder forward and backward movement of the tray.

1 to 4 show a disk device which is a reference example of the present invention, and a plurality of (four in this embodiment) are provided so as to surround the recesses 4 at both front and rear ends of the upper surface 3a of the tray 3. FIG. A rectangular air hole 22 is formed along the left and right directions c and d, and a guide plate 23 is erected along the side edge of each air hole 22 outside the air holes 22. The height h1 is set to be substantially the same as the height h2 of the front plate portion 3b of the tray 3, and a temperature detector 24 is disposed in the upper part of the casing 1, and each of the motors is based on the temperature detected by the temperature detector 24. A controller 25 comprising a microcomputer for controlling the optical pickups 13 and 16 and the optical pickup 12 is provided. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 7 to 9, the same parts are denoted by the same reference numerals and the description thereof is omitted.

The cooling operation will be described. As shown by a solid line in FIG. 1, the disk D is lifted by the turntable 10 and the disk D is rotated at a high speed by the spindle motor 11 via the turntable 10. The flow A is guided along the guide plates 23 into the air holes 22, and the optical pickup 12, the motors 13 and 16, and the I on the printed circuit board 18 are guided.
Cools heat dissipation parts such as C parts.

According to the above configuration, since each guide plate 23 faces the disk D lifted by the turntable 10, the air flow A generated by the high-speed rotation of the disk D and flowing along the upper surface 3 a of the tray 3 The heat-radiating parts below the tray 3 can be efficiently cooled by the airflow A that is guided into the air holes 22 by hitting the guide plate 23, and the disk device can be reduced in size and thickness. Further, the existing tray 3 has a vent hole 22 and a guide plate 2.
Since only 3 is added, the structure is simple and the production cost is low.

The control action of the controller 25 will be described with reference to FIG. 5. In step S1, the disk D is rotated by the spindle motor 11 via the turntable 10 as shown by the solid line in FIG. The optical pickup 12 is moved along the radial direction of the disk by the feed motor 13 and the laser beam is projected from the optical pickup 12 onto the disk D to reproduce or record information recorded on the disk D. Erase. During the operation of the optical pickup 12, the process proceeds to step S3, where it is determined whether or not the temperature detected by the temperature detector 24 is higher than a set value (for example, 40 ° C.). If it is higher, the process proceeds to step S4, and the operation of the optical pickup 12 that is a heat radiation component is stopped. Next, the process proceeds to step S5, and after a predetermined time (for example, 5 to 10 minutes) has elapsed, the temperature detected by the temperature detector 24 is set again (for example, 40 ° C.).
If it is lower, the process returns to step S2, and if it is higher, the process returns to step S2.
6 to stop the rotation of the disk D by the spindle motor 11 which is a heat dissipation component,
In step S7, the drive chassis 5 is moved down f by the loading motor 16, and then in step S8, the tray 3 is advanced a by the loading motor 16 to open the tray insertion port 1a (FIG. 1 virtual line reference). Subsequently, the process proceeds to step S9, and after a predetermined time (for example, 5 to 10 minutes) has elapsed, it is determined again whether or not the temperature detected by the temperature detector 24 is higher than a set value (for example, 40 ° C.). In the case, the process returns to step S9, and in the case of low, the process proceeds to step S10. After the tray 3 is moved backward b by the loading motor 16, the process proceeds to step S11, and the drive chassis 5 is moved up by the loading motor 16. Return to the original state.

According to the above configuration, when the inside of the casing 1 reaches a predetermined high temperature during the operation of the optical pickup 12, the controller 25 controls the first based on the temperature detected by the temperature detector 24.
The operation of the optical pickup 12 is stopped as a stage, the rotation of the disk D by the spindle motor 11 is stopped as the second stage, and the tray 3 is advanced a by the loading motor 16 as the third stage, and the tray insertion port 1a of the casing 1 is moved. Since the casing 1 is opened, the casing 1 is not left in a high temperature state, and the electrical components in the casing 1 can be prevented from being thermally destroyed. Further, after the tray 3 is moved forward a, when the detected temperature becomes lower than the set value after a predetermined time has elapsed, the tray 3 can be moved backward b by the loading motor 16 to automatically return to the original state.

FIG. 6 shows a main part of a disk device according to an embodiment of the present invention. The height h1 of each guide plate 23 is greater than the height h2 of the front plate portion 3b of the tray 3 by a predetermined distance α. (For example, 5mm
A pair of left and right support shafts 23 which are set high by 1 cm) and project from the lower ends of both ends of each guide plate 23.
Each guide plate 23 is attached to the tray 3 so as to be able to be tilted by inserting a into a pivotal support hole 26a of a bearing 26 integrally projecting on the upper surface 3a of the tray 3. Further, a spring 27 is wound around each support shaft 23a, and both ends of each spring 27 are connected to the upper surface 3a of the tray 3 and each guide plate 23.
By engaging with each other, the urging forces F1 and F2 of the two springs 27 cancel each other, so that each guide plate 23 is always held upright. Since the configuration other than the above is substantially the same as that of the reference example (see FIGS. 1 to 5), the same reference numerals are given to the same portions and the description thereof is omitted.

According to the above configuration, since each guide plate 23 is high, the air flow A passing through a relatively high position from the upper surface 3a of the tray 3 is also reliably grasped by each guide plate 23 and guided into each vent hole 22,
The cooling effect can be further enhanced. Further, since each guide plate 23 hits the tray insertion opening 1a of the casing 1 and falls against the spring 27, it passes through the tray insertion opening 1a [
As shown in FIG. 6B, the phantom line], the guide plates 23 do not obstruct the forward and backward advancement a and b of the tray 3.

It is a longitudinal cross-sectional view of the disc apparatus which is a reference example of this invention. It is the same top view. It is a perspective view of the tray. (A) is a perspective view of the principal part, (b) is a longitudinal sectional view of the principal part, and (c) is a plan view of the principal part. It is a flowchart which shows the control action of the controller. (A) is a perspective view of the principal part in the disc apparatus which is one Embodiment of this invention, (b) is a longitudinal cross-sectional view of the principal part, (c) is a top view of the principal part. It is a longitudinal section showing a conventional example. It is the same top view. It is a perspective view of the tray.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 1a Tray insertion port of 2 casing 2 Main chassis 3 Tray 3a Top surface of tray 3b Front plate part of tray 4 Recess for tray disk placement 5 Drive chassis 10 Turntable 11 Spindle motor 12 Optical pickup 13 Feed motor 20 Slit hole 22 Air vent 23 Guide plate 24 Temperature detector 25 Controller 27 Spring A Air flow D Disk a, b Forward / backward c, d Left / right direction e, f Vertical movement

Claims (1)

A tray is disposed on the main chassis in the casing so as to be able to move forward and backward, a disk mounting recess is formed in the center of the upper surface of the tray, and a drive chassis below the tray is attached to the main chassis so as to be movable up and down. A spindle motor with a turntable and an optical pickup movable in the disk radial direction by a feed motor are arranged in the chassis, and a loading motor for driving the tray and the drive chassis is provided in the main chassis. After the drive chassis is moved downward by the forward drive of the loading motor from the state housed in the tray, the tray is advanced, and the disk is taken out from the recessed portion of the most advanced tray, and a new disk is inserted into the recessed portion. Placed and reverse rotation of the loading motor In the disk device in which the drive chassis is moved up after the tray is moved backward by the above, the disk on the tray is lifted by the turntable, and the disk is rotated at a high speed via the turntable by the spindle motor. both end portions so as to surround the recess a plurality of vent holes are formed in the induction plate from respective ventilation holes along its side edge of each vent outside is erected, prior to respective induction plate tray Board
Is set higher by a predetermined interval than that of the tray, and is attached to the tray so that it can be raised and lowered.
If the guide plate is always held upright by a spring , the air flow accompanying the high-speed rotation of the disk is guided along each guide plate into each vent hole, and each guide plate hits the tray insertion hole of the casing.
A disk device characterized in that it passes through the tray insertion opening when it falls down against the heat .

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