JP2000306307A - Optical disc device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an optical disc device allowing the size to be reduced and made thin. SOLUTION: When a motor 801 of a holding mechanism 8 rotates, the rotational force of the motor 801 is transmitted to a cam gear 804 through a worm gear 805 attached to a shaft. When the cam gear 804 rotates in a direction A1, a protrusion 806 of the gear 804 butts a first force receiving part 802a of a lock lever 802 and this part 802a rotates in a direction A2. When the receiving part 802a rotates in the direction A2, a holder 802b of the lever 802 rotates in a direction B to release a tray 5 from a hold state. For mechanically ejecting the tray 5 with an optical disc device 1 set power-off or the like, an insert member is pushed into an insert hole 203 of said front bezel 2, the force receiving part 802c of the lock lever 802 is pressed to rotate the this part 802c in a direction C. When the part 802c rotates in the direction C, the holder 802b moves in the direction B to release the tray 5 from the holding mechanism 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk device having a structure that can be built in an external device such as a personal computer (PC).

[0002]

2. Description of the Related Art Conventionally, an optical disk device has been used as a peripheral device of an external device such as a PC, and among the optical disk devices, there is an optical disk device built in a PC or the like.

An optical disk device having a structure that can be built in a PC is disclosed, for example, in Japanese Utility Model Laid-Open No. 4-39895.

[0004]

When it is assumed that an optical disk device is built in a PC, particularly a notebook PC, among the PCs, the notebook PC itself becomes a desktop PC.
Since it is thinner and smaller than a PC called C, it is desirable that the optical disk device itself be thinned and downsized.

In order to reduce the thickness and size of the optical disk device, it is desirable to mount the components efficiently and reduce the space, or to reduce the size and thickness of the components themselves.

An object of the present invention is to provide an optical disk device that can be reduced in size and thickness.

[0007]

As one means for achieving the object of the present invention, according to the present invention, a tray provided with a spindle for rotating an optical disk and an optical head for irradiating the optical disk with light is provided inside and outside the housing. A holding mechanism having a motor and a lock lever attached to the tray with respect to the optical disk device configured to be movable to a position where the lock lever is rotated by rotating the shaft of the motor to release the holding of the tray. I do.

Preferably, the holding mechanism is provided with a cam gear that rotates with rotation of a motor shaft, and the convex portion provided on the cam gear rotates while abutting on the lock lever to rotate the lock lever. Configuration. The lock lever includes a holding portion that abuts a projection provided on the housing to hold the tray in the housing, a first force receiving portion that abuts the projection provided on the cam gear, A second force-receiving portion for receiving pressure from an insertion member inserted from an insertion port provided in a front bezel attached to the front bezel; and a release portion for contacting a convex portion provided on the housing. Then, when the tray is pushed into the housing by urging the lock lever to a position where the tray can be held in the housing and the tray is pushed into the housing, the release portion is provided on the housing before the holding portion before the holding portion. The release lever contacts the convex portion provided on the housing, and the lock lever rotates to release the contact between the first force receiving portion and the convex portion provided on the cam gear. To be configured.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an optical disk apparatus to which the present invention is applied will be described with reference to the drawings. FIG.
1 is an overall view of an optical disc device 1 to which the present invention is applied. 1, (a) is a left side view of the optical disc device 1,
FIG. 2B is a top view of the optical disk device 1, and FIG. 2C is a front view of the optical disk device 1. This disk device 1 is an optical disk device for an optical disk having a maximum diameter of about 12 cm and a thickness of about 1.2 mm, and has a width and depth of 13 cm.
This is a small and thin optical disk device whose height and height are kept to about 1.3 cm. The optical disk device 1 is configured such that the front is formed by the front bezel 2, the lower surface, the back and side surfaces are formed by the bottom case 3, and the upper surface is formed by the top case 4, and only the front bezel 2 can be seen from the front. A housing is constituted by the bottom case 3 and the top case 4. Although not shown, data and commands (instructions) with external devices are on the back.
A connector capable of inputting or outputting data is provided.

[0010] In a state of being built in an external device such as a PC, only the front bezel 2 can be seen. Optical disk drive 1
In order to operate the optical disk drive, the recording or reproduction operation is performed by operating an external device such as a PC, and the optical disk device 1 itself is operated to perform an operation such as mounting an optical disk.
Therefore, in consideration of the case where the optical disk apparatus 1 is directly operated, the tray moving button 201, the display 202 and the insertion port 203 are provided on the front bezel 2.

The optical disk drive 1 has a tray moving button 2
By pressing 01, the holding of the tray 5 by the holding mechanism 8 (described later) for holding the tray 5 (described later) in the housing is electrically released, and the tray 5 is discharged out of the housing. (Details will be described later.) The user can mount an optical disc on the spindle 601 provided on the tray 5 from the upper surface of the discharged tray 5. Further, the optical disk device 1 is configured to hold the tray 5 in the housing by pushing the tray 5 into the housing.

The display 202 is constituted by an LED or the like, and can display the operating state of the optical disk device 1 by turning on or blinking. Insertion slot 203
Is provided for mechanically manually releasing the holding of the tray 5 by the holding mechanism 8. If the tray 5 is to be ejected out of the housing when the holding of the tray 5 cannot be released electrically, for example, when the power of the optical disc apparatus 1 is turned off,
By pushing an insertion member (not shown) into the insertion slot 203, the holding of the tray 5 by the holding mechanism 8 can be released (details will be described later). By providing parts necessary for the user to operate the optical disc apparatus 1 such as the tray moving button 201, the display 202, and the insertion slot 203 on the front bezel 2 itself, it is possible to secure a separate space for providing these parts. Since the width or height of the optical disk device 1 does not need to be increased, the size and thickness of the optical disk device 1 can be reduced.

FIG. 2 is a perspective view of the optical disk device 1 with the tray 5 discharged, as viewed from the front. As is apparent from FIG. 2, the front bezel 2 is attached to the tray 5. That is, when the tray 5 is discharged out of the housing, the front bezel 2 also moves out of the housing. Further, in order to move the entire tray 5 out of the housing, the tray 5 is connected to the bottom case 3 via the connecting bars 303 and 304. The connecting bar 303 and the connecting bar 304 are arranged on the side surface of the tray 5, and the length thereof is shorter than the depth dimension of the bottom case 3 or the top case 4 so as to fit in the housing. Further, in order that the connecting bar 303 and the connecting bar 304 can move indefinitely and the tray 5 does not come off from the bottom case 3, the optical disk can be mounted on the spindle 601. Tray 5 and bottom case 3
A stopper such as a claw or a convex portion is provided on the surface (a convex portion 306 described later in this embodiment). The bottom case 3 or the top case 4 is configured such that the connecting bar 303 provided on the side surface of the tray 5 and the connecting bar 304 support the tray 5 discharged out of the housing so as to fit in the housing.
In addition, since there is no need to provide a space for parts necessary for movement, the size of the case in the depth direction can be made substantially equal to the diameter of the optical disk, and the thickness and size can be reduced.

The width of the tray 5 is set to
The size of the unit mechanism 6 (which will be described later) including the spindle 601 and the optical head 602 (which will be described later) is limited to about 10.5 cm. In other words, the space formed by the bottom case 3 and the top case 4 is limited to the minimum space required for the rotation of the optical disk and the space for the tray 5, the connection bar 303, and the connection bar 304. 1 can be reduced in size and thickness.

The tray 5 has a front side on which a disk is mounted and a back side on which a unit mechanism 6 is mounted.
The front side has an upper surface portion (hatched portion in FIG. 2) and a lower surface portion (a substantially circular portion not hatched).
The optical disc is provided with a step that can be mounted on the spindle, and the optical disc is surrounded by a wall. The height of the upper surface of the tray 5 is higher than the upper surface of the optical disk when the optical disk is mounted on the spindle 601. The height of the lower surface of the tray 5 is set lower than the lower surface of the optical disk when the optical disk is mounted on the spindle 601. By setting the heights of the upper surface and the lower surface of the tray 5 in this way, the spindle 601 can be used without bringing the optical disk into contact with the tray 5 and the top case 4.
Can be rotated by Hereinafter, the terms “depth, width, and height” and “upper side (front side)” and “lower side (back side)” refer to the directions shown in FIG.

FIG. 3 is a top view of the optical disk device 1 with the tray 5 discharged, with the top cover 4 removed. In order to reduce the size and thickness of the optical disc device 1, a space for raising and lowering the spindle 601 cannot be provided. Accordingly, it is understood that the spindle 5 for rotating the optical disk, the optical head 602 for irradiating the optical disk with light, detecting the return light thereof, and converting it into an electric signal, and the like must be attached to the tray 5. However, a signal processing circuit for recording and reproducing data and inputting and outputting data to and from an external device, and a circuit board 301 provided with the above-described connector are mounted on the bottom case 3 instead of the tray 5, and are mounted on the circuit board 301. The signal processing circuit and the optical head 602 attached to the unit mechanism 6 are electrically connected via the flexible substrate 302.
By attaching the circuit board 301 to the bottom case 3 instead of the tray 5, the number of components moving inside and outside the housing can be reduced, and the portion of the optical disk device 1 moving inside and outside the housing can be reduced in weight. Therefore, the connecting bars 303 and 304, which are required to have sufficient strength to support the tray 5, can be made of resin instead of metal, and the weight can be further reduced. Furthermore, since the transmission distance between the signal processing circuit and the external device can be reduced as compared with the case where the circuit board 301 is attached to the tray 5, deterioration of data reproduced from the optical disk can be suppressed.

In addition, the bottom cover 3 as a fixed part,
Since the top cover 4 is required to have strength as a housing,
It is made of metal.

On the back side of the tray 5, a circuit board 301 is provided.
When the tray 5 is held in the housing, the circuit board 301 is positioned below the tray 5 (the details will be described later). Therefore, since the circuit board 301 can be accommodated in the space in which the tray 5 can be accommodated, there is no need to provide a space separate from the space for accommodating the tray 5 for mounting the circuit board 301 in the optical disc apparatus 1. And a reduction in thickness can be achieved.

As described above, the tray 5 is held in the housing by pushing the tray 5 into the housing. However, when the tray 5 is held in the housing, the tray 5 (in this embodiment, the bottom The projection 305 provided on the case 3) is configured to restrict the movement of one end of the coil spring 504 attached to the tray 5. That is, when the tray 5 is housed in the housing, the tray 5 is held in the housing by the holding mechanism 8, so that the coil spring 504 is provided.
Are twisted by the convex portion 305 and continue to apply force in a direction of discharging the tray 5 out of the housing. Therefore, when the holding by the holding mechanism 8 is released, the tray 5 receives the force of the coil spring 504 in the direction of discharging to the outside of the housing, and discharges the tray 5 to a position where the tray 5 can be manually pulled out. Thereafter, by manually pulling out the tray 5, the tray 5 can be moved to the position shown in FIGS.

As described above, by using a moving mechanism that does not require a loading motor for moving the tray 5 or a transmission mechanism for transmitting the rotation of the loading motor, a space for accommodating the loading motor and the transmission mechanism is not required, and the number of parts can be reduced. Therefore, the size and thickness of the optical disk device can be reduced.

FIG. 4 is a bottom view of the optical disk device 1 with the tray 5 discharged. For convenience of explanation, the flexible substrate 302 is not shown. The unit mechanism 6 and the holding mechanism 8 are covered by the bezel 7 to protect the unit mechanism 6 and the holding mechanism 8. Further, a coil spring 505 is provided on a portion of the tray 5 projecting in the width direction. The outer end of the coil spring 505 is also coiled so that the tray 5
Part of the projection. The rattle in the width direction of the tray 5 when the tray 5 is accommodated in the housing can be suppressed by the coil-shaped portion of the coil spring 505.

The tray 5 has a bezel 7 as viewed from below.
The part that is not covered with the bezel 7 has a step corresponding to the height of the unit mechanism 6 and the bezel 7 when the tray 5 is set in the housing. The circuit board 301 fits in the portion where the mark is formed.

Also, as shown, the coil spring 5
04 is attached to a position corresponding to the upper surface of the tray 5 described above. The portion corresponding to the upper surface of the tray 5 is depressed with respect to the portion corresponding to the lower surface of the tray 5 when viewed from the back side (lower surface side). There is no contact between the coil spring 504 and the circuit board 301, and there is no need to provide a separate space for mounting the coil spring 504. Therefore, the size and thickness of the optical disk device can be reduced.

FIG. 5 is a bottom view of the optical disc device 1 with the tray 5 ejected, with the bezel 7 removed. The holding mechanism 8 is attached to the tray 5 in addition to the unit mechanism 6. While the holding mechanism 8 is directly attached to the tray 5, the unit mechanism 6 is attached to the tray 5 via elastic members (rubber in the present embodiment) 501, 502, and 503. An optical disk is mounted on the unit mechanism 6, and in addition to a spindle 601 for rotating the optical disk, a slide motor 604 for moving an optical head 602 for irradiating the optical disk with light, detecting reflected light, and converting the reflected light into an electric signal is mounted. In other words, the unit mechanism 6 including the driving member such as the spindle 601 and the slide motor 604 that is a source of vibration is connected to the elastic members 501 and 502,
By using a configuration in which the unit mechanism 6 is attached to the tray 5 via the 503, the vibration of the entire optical disk device can be reduced by taking measures against vibration only for the unit mechanism 6.

The flexible board 810 is a board for electrically connecting the motor 801 constituting the tray moving button 201 and the holding mechanism 8 and the circuit board 606 attached to the unit mechanism 6.
This is a board for electrically connecting the slide motor 604 and the circuit board 606. The flexible board 607 is a board that electrically connects the optical head 602 and the circuit board 606. A circuit for driving the optical head 602, the slide motor 601, and the motor 801 is provided on the circuit board 606.

In order to reduce the size and thickness of the holding mechanism 8, the holding mechanism 8 does not use a plunger that occupies a large space.
2 is a mechanism for holding and releasing the tray 5 by operating the tray 2. In the case of a holding mechanism using a plunger, a space of about 40 mm in width and depth is required in consideration of the size of the plunger required to operate the lock lever. Although it was difficult to make the plunger structurally, the holding mechanism 8 that operates the lock lever 802 using the motor 801 can be attached to the tray 5 if there is a space of about 30 mm in width and depth. Accordingly, the size of the unit mechanism 6 can be increased by the size and thickness of the holding mechanism 8. In addition, when a plunger is used, the lock lever may be accidentally pulled in when an impact is applied.However, according to the holding mechanism using a motor, the lock lever is erroneously rotated even when an impact is applied. Because it does not draw in
The reliability of the holding mechanism can be improved. In addition,
The details of the holding mechanism 8 are as shown in FIG. 6 described later.

The fact that the unit mechanism 6 can be made larger means that the optical head 602 can be made larger. By changing the holding mechanism from a holding mechanism using a plunger to a holding mechanism 8 using a motor, the holding mechanism can be attached to the tray 5 if there is a space of about 30 mm in width and depth.
The distance between the central axes of the movable member 13 and the movable member 615 can be set to about 40 mm to about 50 mm, and the optical head 602 can be made larger by that amount. Optical head 602
Can be increased, for example, CD (Compact)
Disc) and semiconductor laser for DVD (Digita)
An optical disc device using an optical head 602 provided with a plurality of semiconductor lasers such as a semiconductor laser for 1 Versatile Disc can be provided.

FIG. 6 is a perspective view showing details when the holding mechanism 8 shown in FIG. 5 is viewed from the back side. For convenience of explanation, the flexible substrate 810 is omitted. The cam gear 804 is attached to the chassis 803 in addition to the motor 801 and the lock lever 802 described above. A worm gear 805 is attached to the shaft of the motor 801. The holding mechanism 8 itself is attached to the tray 5 by screwing from the screw holes 808 and 809 provided in the chassis 803 from the back side of the tray 5.

To release the electrical holding of the tray 5 by the holding mechanism 8, the motor 801 is energized. The motor 801 rotates, and the rotational force of the motor 801 is transmitted to the cam gear 804 via the worm gear 805.
When the cam gear 804 rotates in the direction of arrow A1, the projection 806 provided on the cam gear 804 causes the first
Of the first force receiving portion 802 while contacting the force receiving portion 802a of the first
a rotates in the direction of arrow A2. When the first force receiving portion 802a rotates in the direction of arrow A2, the holding portion 802b of the lock lever 802 rotates in the direction of arrow B to release the holding state of the tray 5. When it is desired to mechanically eject the tray 5 out of the housing when the power of the optical disc apparatus 1 is turned off or the like, the insertion member (not shown) is pushed into the above-described insertion hole 203 provided in the front bezel 2. . When the insertion member is pushed in, the second force receiving portion 80 of the lock lever 802 is pressed.
2c is pressed, and the second force receiving portion 802c rotates in the arrow C direction. When the second force receiving portion 802c rotates in the direction of arrow C, the holding portion 802b moves in the direction of arrow B to release the holding of the tray 5 by the holding mechanism 8. Although not shown in the figure (illustrated in FIG. 8), the holding portion 80 is provided on the convex portion 306 provided on the case side (the bottom case 3 in the present embodiment).
The tray 5 is held in the housing by the hook 2b.

In the holding mechanism 8, the lock lever 802
Is urged by a coil spring 808 (not shown in the figure) attached to the attachment shaft 807 to the position shown in FIG.
It is rotatably supported in each of the depth direction and the height direction. Therefore, in the holding mechanism 8, the motor 801 only needs to be rotated when the holding of the tray 5 is released, and the holding state of the tray 5 can always be released by rotating the cam gear 804 at most once. When the insertion member pushed into the insertion opening 203 provided in the front bezel 2 is removed, the position shown in FIG. 6, ie, the position for holding the tray 5, is held by a coil spring (not shown) attached to the attachment shaft 807. Return.

On the contrary, when the tray 5 is pushed into the housing, the holding portion 802b is lowered by the convex portion 306 when viewed from the back side (lower side) (upward in the height direction when viewed from the front side). ), The holding portion 802b does not hinder the movement of the tray 5. After the convex portion 306 has passed through the holding portion 802b, the holding portion 802 pressed by the convex portion 306
b returns to the original state, and holds the tray 5 in the housing.

The holding mechanism 8 has a structure that prioritizes reduction in size and thickness.
4 is omitted, and a circuit for controlling the number of revolutions of the motor 801 is omitted. Therefore, the stop position of the convex portion 806 of the cam gear 804 due to energization or power failure to the motor 801 is not constant, and the stop position of the convex portion 806 cannot be specified. For this reason, in some cases, the rotation of the motor 801 may be stopped while the holding unit 802b is still rotating in the direction of arrow B. In such a case, the tray 5 may be inserted into the housing even if the tray 5 is pushed into the housing. May not be retained. Therefore, in the holding mechanism 8, the lock lever 802 is
A release portion 802d is provided for releasing the contact between the second gear 02 and the convex portion 806 of the cam gear 804.

FIG. 7 is a diagram showing a positional relationship between the lock lever 802 and the convex portion 306 provided on the case side. This drawing is a side view when the holding mechanism 8 is rotated 90 degrees counterclockwise from the position shown in FIGS. 5 and 6. For convenience of explanation, the motor 801 and the lock lever of the holding mechanism 8 are shown. 802, the first force receiving portion 802a, the chassis 803, the cam gear 804, and the worm gear 805 are omitted. Further, in the drawing, a thin line is an auxiliary line drawn to facilitate understanding of the movement of the lock lever 802.

The tray 5 is pushed into the housing, and for a while, as shown in FIG.
And the release unit 802d do not abut, and the movement of the tray 5 is not restricted. Further, the height from the mounting shaft 807 of the holding mechanism 8 to the release portion 802d does not change at T0, and the height of the holding mechanism 8 itself does not change.

Next, when the tray 5 is continuously pushed into the housing, the projection 306 on the case side and the release portion 802 of the lock lever 802 come into contact with each other. While the case-side protrusion 306 is fixed, the lock lever 802 is rotatably supported on the shaft, so that the release portion 802d can be rotated by the case-side protrusion 306 when viewed from the tray pushing direction. Rotate clockwise. That is, when viewed from the side as shown in FIG. 7B, the release unit 802d moves downward (upward as viewed from the front side of the tray 5), and the first force receiving unit 80 corresponds to this.
2a moves upward (downward when viewed from the front side of the tray 5). The first force receiving portion 802a moves upward (to the lower side when viewed from the front side of the tray 5) so that the first force receiving portion 802a moves.
Since the contact between the a and the convex portion 806 of the cam gear 804 is released, the holding portion 802b always returns to a position where the tray 5 can be held. Accordingly, the tray 5 can be provided with a simple configuration without providing a complicated configuration such as a position detector for the convex portion 806 provided on the cam gear 804 and a circuit for controlling the number of rotations of the motor 801.
Can be reliably supported and released. Further, since the number of components such as a position detector and a circuit for controlling the number of rotations of the motor 801 can be reduced, the holding mechanism can be made smaller and thinner, so that the optical disk device can be made smaller and thinner.
Further, as described above, an optical disk device using an optical head including a plurality of semiconductor lasers can be provided.

The mounting shaft 8 of the holding mechanism 8 at this time is
Although the height from 07 to the release portion 802d changes from T0 to T1, it is smaller than the height from the mounting shaft 807 of the holding mechanism 8 to the chassis 803 of the holding mechanism 8, that is, smaller than the height of the holding mechanism 8 itself. There is no change in the height of the holding mechanism 8 itself, which does not hinder the thinning of the holding mechanism 8.

When the tray 5 is further pushed into the housing from the state shown in FIG. 7B, the release portion 802d returns to the original state, and the protrusion 306 and the lock lever 80 provided on the case side are provided.
The second holding portion 802b comes into contact with the second holding portion 802b. Convex part 30 on the case side
6 is fixed, while the lock lever 802 is rotatably supported by the shaft, and the protrusion 306 provided on the case side is provided.
Is inclining with respect to the tray pushing direction, the holding portion 802b is rotated clockwise by the case-side convex portion 306 when viewed from the side (in the drawing). Move. Therefore, the tray 5 can be continuously pushed into the apparatus without being restricted by the holding unit 802b.

The mounting shaft 8 of the holding mechanism 8 at this time is
Although the height from 07 to the release portion 802d changes from T0 to T2, it is smaller than the height from the mounting shaft 807 of the holding mechanism 8 to the chassis 803 of the holding mechanism 8, that is, smaller than the height of the holding mechanism 8 itself. There is no change in the height of the holding mechanism 8 itself, which does not hinder the thinning of the holding mechanism 8.

Then, when the tray 5 is pushed to the end,
As shown in FIG. 7D, the holding portion 802b returns to its original state, and comes into contact with the protrusion 306 provided on the case side. The tray 5 is held in the housing. At this time, the height from the mounting shaft 807 of the holding mechanism 8 to the release portion 802d does not change at T0, and the height of the holding mechanism 8 itself does not change.

FIG. 8 shows a holding state in the housing by the holding mechanism 8. FIG. 8A is a perspective view showing a state where the unit mechanism 6 attached to the tray 5 by the holding mechanism 8 is held in the housing when the optical disc apparatus 1 is viewed from the front. For convenience of explanation, the illustration of the front bezel 2, the top case 4, the tray 5, the circuit board 301, and the like is omitted. FIG. 8B is an enlarged view in which the part circled in FIG. 8A is enlarged. Optical disk drive 1
Then, the holding portion 802 is provided on the convex portion 306 provided on the case side (the bottom case 3 in the present embodiment) in a state as shown in FIG.
The tray 5 is held in the housing by the hook b.

FIG. 9 is a top view showing the details of the unit mechanism 6. For convenience of explanation, the flexible substrates 607 and 608 and the unit mechanical cover 603 are not illustrated. The hatched portion of the unit mechanism 6 indicates a space in which nothing is provided.

The unit mechanism 6 has a structure in which a driving member such as a spindle 601 and a slide motor 604 and a moving member such as an optical head 602 are attached to a unit mechanism chassis 605 so that members that can be a source of vibration are integrated in the unit mechanism 6. I do. Therefore, it is not necessary for the optical disc drive 1 to take measures against vibration for each of the drive mechanism by the spindle 601 and the drive mechanism by the slide motor 604, and it is sufficient to take measures against vibration only for the unit mechanism 6. As described above, in the present embodiment, the unit mechanism 6 is attached to the tray 5 via the elastic members 501, 502, and 503 to take measures against vibration.
That is, by using an optical disk apparatus using the unit mechanism 6 having such a configuration, it is necessary to take measures against vibration as compared with a case where measures are taken against vibrations of the drive mechanism by the spindle 601 and the drive mechanism by the slide motor 604. The space can be reduced, and the size and thickness of the optical disk device can be reduced.

The optical head 602 is attached to the unit mechanism 6.
And a main guide bar 612 and a sub guide bar 613 as guide members for guiding the movement thereof, and a circuit board 606 as well. The main guide bar 612 holds down the main guide bar 612 from above, and its mounting position can be adjusted by an adjusting screw 609 capable of adjusting the position of the main guide bar 612. Also,
The sub-guide bar 613 presses the sub-guide bar 613 from above, and the mounting position of the sub-guide bar 613 can be adjusted by adjusting screws 610 and 611 that can adjust the position of the sub-guide bar 613.

The optical head 602 includes a slide motor 604
By the rotation of, the slider moves along the main guide bar 612 and the sub guide bar 613 between the position shown in FIG. The optical head 602 is supported at two points on the main guide bar 612 and one point on the sub-guide bar 613, for a total of three points. Since the three-point support is the most stable support method, the backlash of the optical head 602 can be reduced, and the vibration of the unit mechanism 6 can be reduced. The reason why the main guide bar 612 is supported at two points instead of the sub guide bar 613 is that the rack 616 receiving the moving force is provided on the main guide bar 612 side, and the optical head 602 is required to have enough strength to receive the moving force. Because.

FIG. 10 is a bottom (back) view showing the details of the unit mechanism 6. For convenience of explanation, the unit mechanical cover 603 is not shown. The hatched portion of the unit mechanism 6 indicates a space in which nothing is provided. The rotation generated by energizing the slide motor 604 is transmitted to the moving member 615 by adjusting the rotation speed by the transmission mechanism 614. A spiral groove is formed in the moving member 615. Optical head 60
A projection is provided on the rack 616 attached to the rack 2, and the projection moves along the groove of the moving member 615, whereby the optical head 602 moves along the main guide bar 612 and the sub guide bar 613.

The torsion bar 617 is attached to the mounting portion 6
17a is attached to the unit mechanical chassis 5, and the attaching portion 6
17 b is pressed against the sub-guide bar 613, and the mounting portion 617 c is screwed to the unit mechanical chassis 6 via the guide beam 618 with a screw 619, thereby mounting the unit mechanical chassis 6. Also, the guide beam 618
Are the main guide bar 612 and the sub guide bar 613
Can be pressed. That is, in the unit mechanism 6, the main guide bar 612 and the sub guide bar 613 are attached by pressing from below (the back side) the unit mechanism 6 using the urging force of the torsion bar 617. The mounting portion 61 of the torsion bar 617
In order to apply a pressing force for pressing the sub-guide bar 613 to 7b, a convex portion 620 is provided on the unit mechanical chassis 6, and the torsion bar 617 is pressed down. Further, by screwing the mounting portion 617c of the torsion bar 617 together with the guide beam 618 to the unit mechanical chassis 6,
The mounting position of the mounting portion 617c is determined by the mounting portion 617a and the mounting portion 61 when viewed from the lower side (back side) of the unit mechanism 6.
7b is higher than the mounting position of the mounting portion 617c. Accordingly, the torsion bar 617 is elastically deformed and bent. The restoring force due to this bending becomes an urging force, and presses the main guide bar 612 and the sub guide bar 613 from the lower side (back side) of the unit mechanism 6.

The main guide bar 612 and the sub guide bar 613 may be configured to be urged by separate torsion bars, respectively.
By urging both the sub guide bar 613 and the single torsion bar 617, the number of parts can be reduced and a simple configuration can be achieved.

The torsion bar 617 is preferably made of metal having a higher elastic coefficient than resin in consideration of strength and durability enough to generate a restoring force by elastic deformation. On the other hand, the guide beam 618 is preferably made of resin having a lower elastic coefficient than metal in consideration of adjusting the positions of the main guide bar 612 and the sub guide bar 613 using the adjustment screws 609, 610, and 611. .

Hereinafter, a mechanism for adjusting the mounting position of the main guide bar 612 and the sub guide bar 613 will be described. FIG. 11 shows a main guide bar 612, a sub guide bar 613, a torsion bar 617, and a guide beam 61.
FIG. 8 is a perspective view showing a positional relationship between an adjustment screw 8 and adjustment screws 609, 610, and 611. For convenience of explanation, the optical head 60
2, the unit mechanical chassis 605 and other members attached to the unit mechanical chassis 605 are not shown.

Optically superior irradiation, such as an increase in the amplitude of a reproduced signal, when compared with the case where the irradiation angle of the light irradiated from the optical head on the recording surface of the optical disk is perpendicular (the optical axis is perpendicular to the disk surface). It is conventionally known that there is an angle, and an optical axis adjustment for adjusting an optical head to this optimum irradiation angle has been conventionally performed in a manufacturing process of an optical disk device. For the optical axis adjustment to adjust the light irradiation angle by the optical head, the optical axis adjustment by adjusting the mounting position (mounting angle) of the spindle for mounting the optical disk to be irradiated with light, and the optical head for irradiating light are supported. Optical axis adjustment by adjusting the mounting position (mounting angle) of the guide bar to be performed.

If the optical axis is adjusted by adjusting the mounting position (mounting angle) of the spindle, the mounting position adjusting mechanism must be added to the spindle, which is one of the factors that determine the height of the optical disk device. In addition, it is inevitable that the height will increase accordingly. Therefore, in order to reduce the size and thickness of the optical disk device, instead of adjusting the optical axis by adjusting the mounting position (mounting angle) of the spindle, a guide bar for supporting an optical head for irradiating light is mounted. It is preferable to adjust the optical axis by adjusting the position (mounting angle).

In the optical disk device 1, as a mounting position adjusting mechanism as shown in FIG. 11, the size and thickness of the optical disk device are both reduced and the optical axis is easily adjusted. The main guide bar 61 from below (back side) by a torsion bar 617 and a guide beam 618 as urging members.
2. The sub-guide bar 613 is urged upward (front side), and the mounting position of the main guide bar 612 is adjusted by the adjusting screw 609 as an adjusting member. Adjustment screw 61
The mounting position of the sub guide bar 613 is adjusted according to 0 and 611.

An adjustment procedure for adjusting the mounting position (mounting angle) of the guide bar that supports the optical head that emits light will be described below. By moving the optical head 602 to the inner circumference of the optical disk, mounting the optical disk on the spindle 601 and irradiating the light, and turning the adjustment screw 609 while measuring the amplitude and the like of the reproduction signal, that is, by moving the adjustment member up and down Then, the main guide bar 612 in contact with the adjustment screw 609 is rotated in the height direction to perform the adjustment. The adjusting screw 609
Is set at a position at least 6 cm away from the center of the spindle 601, the adjustment screw 609 is not hidden by the optical disk, and the adjustment can be easily performed. With this adjustment, it is possible to adjust the optical head 602 in the radial direction with respect to the optical disk. The mounting member 62
1 is pivotally supported so as to be rotatable only in the height direction.

By moving the adjusting screw 611 while moving the optical head 602 to the outer peripheral side of the optical disk and measuring the amplitude or the like of the reproduced signal as it is, that is, by moving the adjusting member up and down, the sub-contact in contact with the adjusting screw 611 is obtained. The adjustment is performed by rotating the guide bar 613 in the height direction. In addition, the adjusting screw 611 is moved 6 degrees from the center of the spindle 601.
cm or more, the adjustment screw 611
Can be easily adjusted without being hidden by the optical disk. With this adjustment, it is possible to adjust the tangential direction of the optical head 602 with respect to the optical disk.

By detaching the optical disk from the spindle 602 and turning the adjusting screw 610, that is, by moving the adjusting member up and down, the sub guide bar 613 in contact with the adjusting screw 610 becomes parallel to the main guide bar 612. Adjust the position. At this time, since the optical disk has been detached from the spindle 602, the adjustment screw 610
Even if is not more than 6 cm away from the center of the spindle 601, there is no problem in its adjustment.

According to the above procedure, the mounting position (mounting angle) of the main guide bar 612 and the sub guide bar 613 supporting the optical head 602 for irradiating light can be adjusted, and irradiation from the optical head to the recording surface of the optical disk can be performed. The light irradiation angle can be changed, and the optical axis can be easily adjusted.

Since such a mounting position adjusting mechanism can be entirely incorporated in the unit mechanical chassis 6, it hardly affects the size and thickness of the optical disk device. Furthermore, since the height of the spindle, which is one of the factors that determine the height of the optical disk device, is not increased, the size and thickness of the optical disk device can be reduced.

In this mounting position adjusting mechanism, the mounting position can be adjusted by the adjusting member from the upper side (front side) regardless of the size of the optical disk device.
There is also an advantage that the mounting position can be easily adjusted, that is, the optical axis can be adjusted, as compared with the case where the mounting position is adjusted from the lower side (back side).

In particular, in the optical disk device 1, as shown in FIGS. 2 and 3, the tray 5 is provided with the opening 506 corresponding to the adjusting screw 609 and the opening 507 corresponding to the adjusting screw 610. The mounting position can be easily adjusted while the unit mechanism 6 is mounted on the tray 5. Therefore, in an optical disk device that is reduced in size and thickness, the optical axis can be adjusted in a state where the optical disk device is almost assembled, so that the optical disk device can be easily manufactured.

[0060]

According to the present invention, it is possible to provide an optical disk device that is reduced in size and thickness. In particular, since a holding mechanism having a motor and a lock lever is attached to the tray, the holding mechanism can be made smaller and thinner, so that the optical head can be made larger without hindering the size and thickness of the optical disk device. Can be

[Brief description of the drawings]

FIG. 1 is an overall view of an optical disc device 1 to which the present invention is applied.

FIG. 2 is a perspective view of the optical disc apparatus 1 in a state where a tray 5 has been discharged, as viewed from the front.

FIG. 3 is a top view of the optical disc device 1 in a state where a tray 5 has been ejected, with a top cover 4 removed.

FIG. 4 is a bottom view of the optical disc apparatus 1 in a state where a tray 5 has been discharged.

FIG. 5 is a bottom view of the optical disc device 1 with the tray 5 discharged, with the bezel 7 removed.

FIG. FIG. 6 is a perspective view showing details when the holding mechanism 8 shown in FIG. 5 is viewed from the back side.

FIG. 7 is a diagram showing a positional relationship between a lock lever 802 and a protrusion provided on a case side.

FIG. 8 is a perspective view showing a state where the unit mechanism 6 attached to the tray 5 is held in the housing by the holding mechanism 8 when the optical disc apparatus 1 is viewed from the front.

FIG. 9 is a top view showing the details of the unit mechanism 6;

FIG. 10 is a bottom view showing the details of the unit mechanism 6;

FIG. 11 is a perspective view showing a positional relationship among a main guide bar 612 as a member to be adjusted, a sub guide bar 613, a torsion bar 617 as an adjusting member, a guide beam 618, and adjusting screws 609, 610, 611. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical disk apparatus, 2 ... Front bezel, 3 ... Bottom case, 4 ... Top case, 5 ... Tray, 6 ... Unit mechanism, 7 ... Bezel, 8 ... Holding mechanism, 801 ... Motor, 8
02 ... lock lever, 803 ... chassis, 804 ... cam gear, 805 ... worm gear, 806 ... convex part, 807 ...
Mounting shaft, 808, 809 ... screw holes.

Claims (4)

[Claims] 1. An optical disk device comprising a tray provided with a spindle for rotating an optical disk and an optical head for irradiating the optical disk with light, wherein the tray can be moved into and out of a housing.
An optical disc, wherein a holding mechanism having a motor and a lock lever is mounted on the tray, and the lock lever is rotated by rotation of a shaft of the motor to release the holding of the tray. apparatus. A cam gear that rotates with rotation of a shaft of the motor; and a convex portion provided on the cam gear rotates while abutting on the lock lever to rotate the lock lever. The optical disk device according to claim 1, wherein the optical disk device is configured to perform the following. 3. A holding portion for holding the tray in the housing by abutting on a projection provided on the housing, a first force receiving portion abutting on the projection provided on the cam gear. A second force receiving portion that receives pressure from an insertion member inserted from an insertion opening provided in a front bezel attached to the tray; and a release portion that comes into contact with a protrusion provided on a housing. The optical disk device according to claim 2, wherein 4. When the tray is pushed into the housing by urging the lock lever to a position where the tray can be held in the housing, and the tray is pushed into the housing, the release unit is moved ahead of the holding unit. The first force receiving portion is configured such that the lock lever pivots with the release portion abutting on the convex portion provided on the housing. 4. The optical disk device according to claim 3, wherein the contact between the cam gear and the convex portion provided on the cam gear can be released.