JP4687261B2 - Disk drive device and electronic device - Google Patents

Description

  The present invention relates to a disk drive device and an electronic apparatus capable of recording and reproducing signals on a disk-shaped recording medium such as an optical disk.

  Conventionally, optical discs such as CD (Compact Disk) and DVD (Digital Versatile Disk) and magneto-optical discs such as MD (Mini Disk) are known as disc-shaped recording media. Various types of disk drive devices corresponding to disk cartridges or the like that store the disk are provided. Of these, discs such as CDs and DVDs that do not use cartridges are the most popular because they are low in price because there are no cartridges, and the drive devices can be easily reduced in thickness and cost.

  In such a type disk drive device that does not use a cartridge, a type in which a lid and a door provided in the case are opened and a disk is directly mounted on a turntable facing from the type (so-called clamshell type), from the case A type in which a disc is automatically mounted on a turntable in the housing when the disc tray is pulled into the housing by placing the disc on a disc tray that is inserted and removed in the horizontal direction, or a turn on this disc tray. A table is provided integrally, and when the disc tray is pulled out of the housing, the disc is directly mounted on the turntable (so-called tray type), just inserting the disc from the disc slot provided on the front of the housing The disc is automatically mounted on the turntable (so-called slot interface) Flop) is present.

  By the way, in recent years, these disk drive devices have been required to have higher speed and larger capacity. However, when the rotation of the disk is increased, a part with low atmospheric pressure is generated in a part of the disk drive device, and the outside of the device. However, there is a problem that the outside air flying on the floating dust is sucked and the dust adheres to the inside of the apparatus or the disk surface.

  Also, a disk intended for higher capacity has a smaller area for each bit and a smaller laser spot diameter on the disk surface, so the dust on the disk surface has a greater effect on the signal quality than before. There was also a problem that it was easy to cause and directly caused an error.

As a technique for preventing such dust from adhering to a disk, for example, in a disk cartridge incorporating a disk, the air in the apparatus is driven by rotation of the disk in the disk cartridge in the disk drive apparatus. There is one in which one or more air intake passages to be sucked in are formed and a dust collecting filter is disposed in the air intake passage (see, for example, Patent Document 1).
JP 2000-48535 A

  However, the technique described in Patent Document 1 is based on the assumption that a cartridge is used, and the mechanism in the cartridge prevents dust from being attached. Therefore, a CD, DVD, BD (Blu-ray) that does not use a cartridge is used. Even if you try to prevent dust on the disk, etc., it cannot be applied as it is.

  In view of the circumstances as described above, an object of the present invention is to prevent an error rate from being deteriorated due to dust by preventing suction of dust to a removable disk that does not use a cartridge and adhesion of dust to the disk. It is an object of the present invention to provide a possible disk drive device and an electronic apparatus equipped with such a disk drive device.

  In order to solve the above-described problems, a disk drive device according to a main aspect of the present invention includes a reproduction mechanism capable of reproducing a signal recorded on a recording medium while rotating the disk-shaped recording medium, and the reproduction mechanism. An internal housing and a first dust collecting filter, provided on at least one of an upper surface and a bottom surface of the housing, and the recording medium when the recording medium is driven to rotate through the first dust collecting filter; A gas introduction unit configured to introduce a gas into the housing from a direction substantially perpendicular to the recording surface of the medium and to set the peripheral edge of the recording medium in the housing to a positive pressure.

  Here, the disk-shaped recording medium is, for example, an optical disk such as a CD, a DVD, or a BD. The gas is, for example, air. According to this configuration, the rotation of the recording medium causes a negative pressure in the vicinity of the center of rotation of the recording medium, whereby the gas outside the casing is introduced into the casing from the gas introduction section, and the first collection is performed. Dust contained in the gas is adsorbed by the dust filter. Further, due to the centrifugal force of the swirling flow generated by the rotation of the recording medium, the gas introduced into the housing flows to the peripheral edge of the recording medium, and the peripheral edge becomes positive pressure. In general, due to the structure of the disk drive device, the case is formed by combining two cases up and down, and unintended fine gaps are likely to occur in the case near the periphery of the recording medium. Therefore, by setting the area to a positive pressure, it is possible to prevent a gas containing dust from flowing in from the minute gap.

  In the disk drive device, the gas introduction part is provided on a back side of the upper surface or the bottom surface of the housing, and includes a first dust collecting filter chamber in which the first dust collecting filter is accommodated, and the housing A first opening provided on the upper surface or the bottom surface for communicating the first dust collection filter chamber and the outside of the housing, and the first dust collection filter chamber with respect to the first dust collection filter The second opening is provided on the opposite side of the first opening so as to be covered with the first dust collection filter, and communicates the first dust collection filter chamber with the inside of the housing. You may have. As a result, the dust is introduced into the first dust collecting filter chamber from the first opening, and after being removed by the first dust collecting filter, the dust is introduced into the housing from the second opening. That is, all the dust in the gas introduced into the housing is purified in the first dust collecting filter chamber.

  In the disk drive device, the reproduction mechanism reproduces a signal recorded on the recording medium that is rotationally driven, a mounting unit that mounts the recording medium, a spindle motor unit that rotationally drives the recording medium that is mounted. The first dust collecting filter chamber may be provided in a substantially vertical direction of the mounting portion on the upper surface of the housing. Since the vicinity of the mounting portion on which the recording medium is mounted is a negative pressure region due to the rotational driving of the recording medium, the first filter chamber is provided immediately above the negative pressure region, so that the gas from the outside of the housing can be efficiently collected. Thus, the vicinity of the peripheral edge of the recording medium in the housing can be set to a positive pressure.

  The disk drive device is provided in the housing, and is provided in a second dust collection filter chamber in which the second dust collection filter is accommodated, and in the second dust collection filter chamber, and the recording by the reproduction mechanism is performed. An inlet for introducing the swirling airflow generated in the casing by the rotation of the medium, and an exhaust provided in the second dust collecting filter chamber for discharging the swirling airflow introduced from the inlet to the casing. And an outlet. As a result, even if dust is included in the swirling airflow generated by the rotational drive of the recording medium, the dust is exponentially generated by passing the swirling airflow many times through the second dust collecting filter chamber. Since it is removed, the gas in the housing can be further purified.

In the disk drive device, the first dust collection filter has a first filtration efficiency and a first pressure loss, and the second dust collection filter has a second filtration lower than the first filtration efficiency. The second pressure loss may be lower than the efficiency and the first pressure loss. As the first dust collection filter, for example, a thin-film Gore-Tex (registered trademark) filter having a large number of ultrafine holes is used, and the filtration efficiency is 95% or more at a flow rate of 5 cm / sec, for example. As the second dust collecting filter, for example, an electret type filter using charged polypropylene cotton is used, and the filtration efficiency is, for example, about 40% at a flow rate of 5 cm / sec, and the pressure loss is, for example, a flow rate of 3.2 m / sec. It is about 12.25Pa in min. Since the first dust collection filter passes the gas outside the housing only once, it increases the filtration efficiency and pressure loss, so that the dust can be adsorbed reliably and the gas from the unintended minute gap in the housing. Can be prevented from flowing out and the positive pressure at the periphery of the recording medium can be maintained. Moreover, since the swirling flow of the clean gas that has passed through the first filter passes many times, the second dust collection filter increases the circulation efficiency by reducing the pressure loss even if the filtration efficiency is relatively low. be able to.

  The disk drive device is provided on a side surface of the housing, and is provided above a slot for inserting and ejecting the recording medium, the pickup mechanism in the housing, and the slot side and the mounting portion side. A transport mechanism for transporting the recording medium between the first dust collection filter chamber and the mounting section, and the recording medium transported by the transport mechanism to the mounting section. You may further comprise the protrusion part which contact | abuts the said recording medium at the time of mounting | wearing and assists mounting | wearing of the said recording medium. The projecting portion may be formed integrally with the first dust collecting filter chamber, or may be provided in the first dust collecting filter chamber by bonding, screwing, or the like, with the projecting portion as a separate member. The disk drive device is a so-called slot-in type disk drive device, and after the disk inserted from the slot is transported to the mounting position, the pickup mechanism is moved upward in the housing to the mounting portion. Insert the disc. The protrusion is intended to make it easier to mount the recording medium while suppressing the recording medium from above. However, even in a so-called slot-in type disk drive device in which such a protrusion needs to be provided, the protrusion is not provided. By providing integrally with the first dust collecting filter chamber, it is possible to prevent dust from adhering to the recording medium.

  An electronic apparatus according to another aspect of the present invention includes a reproduction mechanism capable of reproducing a signal recorded on a recording medium while rotating a disk-shaped recording medium, a housing incorporating the reproduction mechanism, and a first And is provided on at least one of the upper surface and the bottom surface of the housing, and is substantially perpendicular to the recording surface of the recording medium when the recording medium is driven to rotate through the first dust collecting filter. A disk drive device having a gas introduction portion for introducing a gas into the housing from a direction and setting the peripheral edge of the recording medium in the housing to a positive pressure, and a control unit for controlling driving of the disk drive device It comprises.

  Examples of the electronic device include a computer (in the case of a PC, a laptop type or a desktop type), a PDA (Personal Digital Assistance), an electronic dictionary, a camera, a display device, an audio / visual device, Examples include mobile phones, game devices, car navigation devices, robot devices, and other electrical appliances. The control unit generates and sends a signal to at least the disk drive unit based on an operation input from the user, and is a CPU, for example.

  According to the present invention, it is possible to prevent the error rate from deteriorating due to dust by preventing the suction of dust to a removable disk that does not use a cartridge and the adhesion of dust to the disk.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
First, a first embodiment of the present invention will be described. FIG. 1 is a plan view of the so-called clamshell type disk drive device 100 according to the present embodiment when the upper case 2 is removed, and FIG. 2 is an upper case of the disk drive device 100 shown in FIG. 2 is a schematic cross-sectional view in the AA direction during the opening of FIG. 2, and FIG. 3 is a plan view showing the positional relationship between the positive pressure filter 9 and the positive pressure filter chamber 6 shown in FIG.

  As shown in these drawings, the housing 1 of the disk drive device 100 according to the present embodiment closes an upper case 2 and a lower case 3, a hinge 4 that couples them in a rotatable and openable manner, and an upper and lower case. At this time, it has a lock claw 5 for engaging and locking both.

  A pickup unit 10 is incorporated in the housing 1. The pickup unit 10 includes a disk mounting unit 12 on which the optical disk 20 is mounted, a spindle motor 11 that rotates the optical disk 20 mounted on the disk mounting unit 12, and an optical disk 20 that is rotated by the spindle motor 11. On the other hand, a pickup mechanism 14 for writing or reading a signal and a pickup feeding mechanism 13 for feeding the pickup mechanism 14 in the radial direction of the optical disc 20 are provided integrally with the base plate 15. The pickup unit 10 is arranged so that the disc mounting portion 12 is positioned substantially at the center of the bottom surface of the lower case 3. The disk mounting portion 12 has a plurality of locking claws 12 a that engage with the center hole of the optical disk 20 and lock the periphery of the center hole of the optical disk 20.

  The pickup mechanism 14 collects a light beam emitted from a semiconductor laser (not shown) serving as a light source by an objective lens 14a, irradiates the signal recording surface of the optical disc 20, and returns the light reflected by the signal recording surface. It has an optical block for detecting a light beam by a photodetector made up of a light receiving element or the like, and performs writing or reading of a signal to or from the optical disc 20.

  Although not shown, the pickup unit 10 is a biaxial actuator that drives the objective lens 14a to move in the optical axis direction (referred to as the focusing direction) and the direction orthogonal to the recording track of the optical disc 20 (referred to as the tracking direction). And the objective lens 14a on the signal recording surface of the optical disc 20 while the objective lens 14a is displaced in the focusing direction and the tracking direction by the biaxial actuator based on the detection signal from the optical disc 2. Drive control is performed such as a focus servo for focusing the light beam and a tracking servo for causing the spot of the light beam collected by the objective lens 14a to follow the recording track. As the objective lens driving mechanism, in addition to such focusing control and tracking control, the signal of the optical disc 20 is irradiated so that the light beam collected by the objective lens 14a is irradiated perpendicularly to the signal recording surface of the optical disc 20. A triaxial actuator that can adjust the inclination (skew) of the objective lens 14a with respect to the recording surface may be used.

  The pickup feeding mechanism 13 has a pair of guide shafts 30a and 30b that support the pickup mechanism 14 so as to be slidable in the radial direction of the optical disc 2, and the pickup mechanism 14 supported by the pair of guide shafts 13a and 13b is connected to the optical disc 20. The displacement is driven in the radial direction.

  Note that the bottom part of the lower case 3 has electronic components such as an IC chip constituting a drive control circuit (not shown) for controlling the drive of the disk drive device 100, connectors for electrical connection of each part, A circuit board on which detection switches and the like to be described later for detecting the operation of each part are arranged is attached.

  As shown in FIGS. 2 and 3, a positive pressure filter chamber 6 is provided in the upper case 2 and in a substantially vertical direction of the disk mounting portion 12. A first opening 7 for communicating the positive pressure filter chamber 6 with the outside of the housing 1 is provided on the upper surface of the upper case 2. For example, a positive pressure filter 9 is attached by sticking. In addition, a second opening is provided on the side of the positive pressure filter chamber 6 opposite to the first opening 7 with respect to the positive pressure filter 9 so as to be covered with the positive pressure filter 9. The filter chamber 6 communicates with the inside of the housing 1.

  For example, the positive pressure filter 9 is formed in a circular shape that is concentric with the optical disk 20 mounted on the disk mounting portion 12 when viewed from the planar direction, and the positive pressure filter chamber 6 is also designed according to the shape. The shape of the positive pressure filter 9 is preferably the above-mentioned circular shape in consideration of the clearance with the optical disk 20 when the disk drive device 100 is to be thinned. In view of the cost of punching), a rectangular shape with less wasted (discarded) parts is preferable. In addition, a polygonal shape or a rectangular aspect ratio can be changed in accordance with the internal structure of the disk drive device.

As a material of the positive pressure filter 9, for example, a Gore-Tex (registered trademark) filter having a high filtration efficiency but a high pressure loss is preferable. This is because, as will be described later, the positive pressure filter 9 is used to maintain the positive pressure inside the housing 1 after allowing the outside air containing dust to pass through only once to remove the dust. The filtration efficiency of the positive pressure filter 9 in this case is, for example, 95% or more at a flow rate of 5 cm / sec.

  Further, in order to prevent clogging of the positive pressure filter 9 having high filtration efficiency and high pressure loss and to sufficiently suck the necessary outside air, the area of the positive pressure filter 9 is designed to be as large as possible. It is preferable that the area of the positive pressure filter chamber 6 and the second opening 8 in the plane direction is designed to be as large as possible.

  As shown in FIGS. 1 to 3, a circulation filter chamber 16 is provided inside the lower case 3 outside the outer periphery of the optical disk 20, for example, at the lower left corner. A circulation filter 19 is provided in the circulation filter chamber 16, and an introduction port 17 and a discharge port 18 are provided at substantially symmetrical positions with respect to the circulation filter 19. When the optical disk 20 is rotationally driven, the swirling flow generated by the rotational drive is introduced into the circulation filter chamber 16 from the introduction port 17, passes through the circulation filter 19 and is discharged from the discharge port 18, and the optical disk 20 is rotated. Circulates within the housing 1.

  The material of the circulation filter 19 is charged in consideration of the fact that the swirling flow in the housing 1 is repeatedly circulated, for example, the filtration efficiency is lower than the positive pressure filter 9 but the pressure loss is also low. An electret type filter using polypropylene cotton is used. The filtration efficiency of the circulation filter 19 in this case is, for example, about 40% at a flow rate of 5 cm / sec, and the pressure loss is, for example, about 12.25 Pa at a flow rate of 3.2 m / min.

  Next, the operation of the disk drive device 100 in this embodiment will be described. FIG. 4 is a cross-sectional view schematically showing the flow of air in the housing 1 from the direction of arrow B in FIG.

  As shown in the figure, when the optical disk 20 mounted on the disk mounting unit 12 is rotationally driven by the spindle motor 11, a swirling flow is generated in the rotation direction of the optical disk 20 so as to be dragged by the rotation of the optical disk 20. Then, since the air tends to flow toward the outer peripheral side of the optical disk 20 due to the centrifugal force of the swirl flow, the pressure in the region A in the vicinity of the rotation center of the optical disk 20 (near the disk mounting portion 12) is reduced and swirling is performed. Due to the influence of the flow itself, the pressure of the surface of the upper case 2 facing the optical disk 20 decreases (according to Bernoulli's theorem). Further, when the swirl flow flows to the region B near the peripheral edge of the optical disc 20, the region B has a particularly positive pressure, and the regions other than the region A have a slight positive pressure as a whole.

  As the pressure on the area A and the opposing surface of the optical disk 20 decreases, an atmospheric pressure difference is generated between the positive pressure filter chamber 6 and the area A side, and outside air is taken in from the first opening 7 and positive pressure is applied. It passes from the pressure filter chamber 6 side to the optical disk 20 side in the housing 1. At this time, the dust 30 contained in the outside air is removed by the positive pressure filter 9, and the purified air is taken into the housing 1. The taken-in air flows toward the region B where the positive pressure is generated due to the rotation of the optical disk 20.

  In the region B at the peripheral edge of the optical disc 20, there are unintended gaps that are inevitably generated due to the design of the disk drive device 100, such as the gap 1 a between the upper case 2 and the lower case 3. Since it has a positive pressure compared to the outside, it is possible to prevent dust from entering through the gaps such as the gap 1a. Further, since the entire portion other than the region A in the housing 1 is also slightly positive pressure, even if there is a gap other than the gap 1a, such as a gap in the bottom surface of the lower case 3, the gap 1 Intrusion of dust can be prevented.

  Here, in order to maintain the positive pressure in the area other than the area A, the positive air pressure filter 9 is used to supply more air than the air gap escapes from the gaps other than the first opening 7 of the disk drive device 100. There is a need. If the gaps are excessive, there is a risk that replenishment from the positive pressure filter 9 will not be in time for leakage of air, the positive pressure filter 9 may be clogged immediately, or dirty outside air may enter through the gaps. Therefore, it is preferable that each gap is designed to be minimized, and it is more preferable that each gap is sealed even if it is simple.

  By the way, in the disk drive device in which each gap is sealed, it is imagined that the intrusion of outside air can be inhibited without the positive pressure filter 9 as in this embodiment, but the disk rotates. For this reason, a low-pressure portion is locally generated due to the influence of each component inside the apparatus, etc., so that the outside air containing dust enters and contaminates the inside of the apparatus even if the sealing is quite robust. In addition, the robust structure of the seal has a problem that the structure is complicated and the cost is high.

  However, if the portion other than the region A is positively pressurized as in the present embodiment, there is no local low pressure portion, and therefore the gap is suppressed to such an extent that the positive pressure can be maintained even if the sealing is not perfect. If possible, entry of dust can be prevented.

  Further, the air purified by the positive pressure filter 9 and taken into the housing 1 becomes a swirl flow, and the swirl flow is introduced into the circulation filter chamber 16 from the introduction port 17 and passes through the circulation filter 19. It is discharged from the discharge port 18. Since the air in the housing 1 is always swirling while the optical disk 20 is rotating, even if there is dust that the positive pressure filter 9 could not capture, the circulation filter 19 was moved many times. By passing, the air in the housing 1 becomes exponentially clean.

  By the way, even if the air inside the disk drive device 100 is clean, if a large amount of clean air is discharged from each gap such as the gap 1a in exchange for the air flowing in through the positive pressure filter 9, the amount of dust is relatively large. There is a possibility that the air in the housing 1 is stabilized in the state. For this reason, in designing the disk drive device 100, the amount of air discharged from each gap is minimized, and the purpose of the positive pressure filter 9 is positive in regions other than the region A rather than introducing outside air. Pressure should be maintained.

  Of the two filters, the positive pressure filter 9 and the circulation filter 19, if the gaps can be minimized so that the air discharged from each gap is reduced without using the circulation filter 19, the intrusion of dust. Therefore, the positive pressure filter 9 alone may be used as long as the performance required for the disk drive device can be exhibited.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In this embodiment, a so-called tray type disk drive device 200 is applied as the disk drive device. In addition, in this embodiment, the same code | symbol is attached | subjected about the part which becomes the same structure as the said 1st Embodiment, and description is simplified or abbreviate | omitted.

  5 is a plan view of the disk drive device 200 according to the present embodiment when the upper case 2 is removed, and FIG. 6 is an AA direction view of the upper case 2 of the disk drive device 200 shown in FIG. 7 is a plan view showing the positional relationship between the positive pressure filter 9 and the positive pressure filter chamber 6 shown in FIG.

  As shown in these drawings, the housing 1 of the disk drive device 200 according to the present embodiment includes an upper case 2 and a lower case 3, and the side rails 22 provided on the left and right sides of the lower case have tray units 21. Is slidable along the side rail 22 in the direction of arrow B in FIG. The tray unit 21 is integrally provided with the pickup unit 10. When the user depresses the tray unit 21, for example, an eject button (not shown), the tray unit 21 is pulled out in the arrow B direction, and the user When the optical disk 20 is directly mounted on the mounting unit 12 and the eject button is pressed again, the optical disk 20 is installed in the disk drive device 200.

  As shown in FIGS. 6 and 7, a first opening 7, a second opening 8, and a positive pressure filter 9 are provided in the upper case 2 and in a substantially vertical direction of the disk mounting portion 12. A positive pressure filter chamber 6 is provided. Unlike the case of the first embodiment, the shapes of the positive pressure filter chamber 6 and the positive pressure filter are rectangular, but the basic functions are the same. By forming the positive pressure filter 9 into a square shape, the cost for forming the filter can be suppressed.

  A circulation filter chamber 16 having an introduction port 17, a discharge port 18 and a circulation filter 19 is provided in the lower right corner portion of the tray unit 21, for example. The circulation filter chamber 16 and the circulation filter 19 are different in the installation position and shape from the first embodiment, but the basic functions are the same.

  With this configuration, in the so-called tray type disk drive device as in the present embodiment, the positive pressure filter 9 is utilized by utilizing the swirl flow and centrifugal force generated by the rotational drive of the optical disk 20 as in the first embodiment. By introducing outside air into the housing 1 through the positive pressure and making the inside of the housing 1 a positive pressure, it is possible to prevent dust from entering through a gap such as the gap 1a.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In this embodiment, a so-called slot-in type disk drive device 300 is applied as the disk drive device. In addition, in this embodiment, the same code | symbol is attached | subjected about the part which becomes the same structure as the said 1st Embodiment and 2nd Embodiment, and description is simplified or abbreviate | omitted.

  FIG. 8 is a plan view when the upper case 2 is removed from the disk drive device 200 according to the present embodiment, and FIG. 9 is an AA direction of the upper case 2 of the disk drive device 200 shown in FIG. 10 is a plan view showing the positional relationship between the positive pressure filter 9 and the positive pressure filter chamber 6 shown in FIG. 9, and FIG. 11 schematically shows the inside of the positive pressure filter chamber 6. As shown in FIG. It is the shown perspective view.

  As shown in these drawings, the housing 1 of the disk drive device 300 according to this embodiment includes an upper case 2, a lower case 3, and a front panel 31. The optical disk 20 is inserted into and ejected from the front panel 31. Slot 32 is provided. The slot 32 is provided with a shielding member 37 such as a curtain or a shutter in order to minimize the gap of the disk drive device 300, and the slot 32 is preferably closed by the shielding member 37 when the optical disk 20 is driven to rotate. . In addition to the pickup unit 10, the lower case 3 has a disk transport mechanism 33 for transporting the optical disk 20 between the slot 32 and the disk mounting portion 12 when the optical disk 20 is inserted and ejected. Is provided.

  The disk transport mechanism 33 has a pair of first rotation arms 34 provided substantially symmetrically with respect to the disk mounting portion 12 and a second rotation engaged with the first rotation arm 34 on the left side. The arm 35 includes a connecting arm 36 having a so-called pantograph structure that rotatably connects the left and right first rotating arms. The first rotating arm 34 is rotated in the left and right directions in FIG. 8 in conjunction with the connecting arm 36 to convey the inserted optical disk to the disk mounting unit 12 and to hold the inserted optical disk. It is possible to transport the optical disk 20 from the 12 side to the slot side. The second rotating arm 35 assists the operation of the first rotating arm 34 pulling the inserted optical disk 20 toward the disk mounting portion 12 side.

  The disk drive device 300 according to the present embodiment corresponds to the conveyance and driving of both a large-diameter disk 20A having a diameter of, for example, 12 cm and a small-diameter disk 20B having a diameter of, for example, 8 cm. Reference numeral 34 indicates that the optical disk 20 having each diameter can be drawn into the disk drive device 300 and discharged out of the disk drive device 300 by rotating in accordance with the rotation width of the diameter of the optical disk 20 having each diameter. Yes.

  The lower case 3 is provided with a lifting mechanism (not shown) that lifts and lowers the pickup unit 10 in a direction substantially perpendicular to the recording surface of the optical disc 20. The optical disk 20 transported to the disk mounting portion 12 by the disk transport mechanism 33 is lifted by the pickup unit 10 as the pickup unit 10 is lifted by the lifting mechanism, and is pressed against the inner surface of the upper surface of the upper case from above. As a result, the center hole of the optical disc 20 is chucked to the locking claw 12 a of the disc mounting portion 12. Then, as shown in FIGS. 9 to 11, in the substantially vertical direction of the disc mounting portion 12, which is the bottom portion of the positive pressure filter chamber 6, it is lifted to the pickup unit 10 by the lifting mechanism when the optical disc 20 is chucked. In addition, a protruding portion 6a is formed integrally to hold the optical disc 20 from above so that the chucking operation can be performed smoothly.

  As shown in FIGS. 10 and 11, the protrusion 6 a is provided to be supported by the beam portion 6 b on the bottom surface of the positive pressure filter chamber 6, and the second opening 8 includes the protrusion 6 a and It is formed so as to be divided into four sectors by the beam portion 6b. The positive pressure filter 9 has a circular shape, and is provided so as to cover the second opening 8 together with the protruding portion 6a and the beam portion 6b from above. The protruding portion 6 a may not be formed integrally with the positive pressure filter chamber 6, but may be configured by, for example, bonding an iron plate for a magnet chuck to the bottom surface of the positive pressure filter chamber 6.

  In the slot-in type disk drive device 300 according to the present embodiment, since the structural members such as the disk transport mechanism 33 are complicated and the thickness is intended to be thin, there is no room for clearance. Although the circulation filter chamber 16 and the circulation filter 19 as in the embodiment are not provided, it is needless to say that the circulation filter chamber 16 and the circulation filter 19 may be provided, for example, at a corner portion of the lower case 3 if there is a clearance.

  With the above configuration, also in the so-called slot-in type disk drive device as in the present embodiment, the swirl flow and centrifugal force generated by the rotational drive of the optical disk 20 are reduced as in the first embodiment and the second embodiment. By utilizing outside air into the housing 1 through the positive pressure filter 9 and making the inside of the housing 1 positive pressure, it is possible to prevent dust from entering through the gaps such as the gap 1a. Further, in the slot-in type disk drive device 300 as in the present embodiment, the protruding portion for chucking is required as described above, but by forming the protruding portion in the positive pressure filter chamber 6. The positive pressure filter 9 can be installed while exhibiting the function as the protruding portion, while avoiding the protruding portion, and the function of the positive pressure filter 9 can be sufficiently exhibited.

  It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

  In the first and second embodiments described above, the circulation filter 19 is provided in the circulation filter chamber 16, but the circulation filter chamber 16 is not provided. On the other hand, there may be a case where a practical effect can be obtained only by installing the circulation filter 19 in a direction substantially perpendicular to the direction. In this case, a fixing portion for fixing the circulation filter 19 is provided on the inner wall or the like of the lower case 2. The elimination of the circulation filter chamber 16 is often advantageous in terms of cost and space efficiency. In particular, in the case of a disk drive device of a type in which the user cannot touch the inside of the housing, such as the slot-in type disk drive device 300, the user inadvertently touches the circulation filter 19 to damage the circulation filter 19 or to contaminate it. Therefore, the necessity of the circulation filter chamber 16 is less than that of the disk drive device of the clam shell type or the tray type.

  Similarly, with respect to the positive pressure filter 9, the positive pressure filter chamber 6 may not be provided if a sufficient opening is obtained in the upper case 1 or the lower case 3. In this case, one opening having a large area may be provided and directly closed by the positive pressure filter 9. However, since the material of the positive pressure filter 9 is often very fragile, a measure for preventing the user's hand and internal parts from directly touching the positive pressure filter 9 is required. The disk drive device of the present invention is included in a device such as a PC, and measures have been established so that the user (and the assembly operator) cannot touch it directly, and the disk drive device has sufficient rigidity even with a large opening. In some cases, this configuration is cost effective and space efficient.

  In the above-described embodiment, the disk-shaped recording medium is mounted as it is in the disk drive device. However, even in a cartridge containing the disk-shaped recording medium, the upper surface or the bottom surface of the cartridge is greatly opened and the disk is If an object whose surface is exposed is applied, air is introduced into the disk drive device by the rotation of the disk, so that the same effect as in the above embodiment can be obtained.

  In the above-described third embodiment, the rotating arm is used as the disk transport mechanism 33. However, the disk may be formed by another configuration such as a pair of guide rollers provided in the upper case 2 and the lower case 3, respectively. You may make it convey.

  Although it is assumed that the disk drive device 100 in the first embodiment exists as a stand-alone device, the disk drive devices 200 and 300 in the second embodiment and the third embodiment are, for example, PCs, AV devices, and in-vehicle devices. It may be built-in, or of course, may exist stand alone.

It is a top view at the time of removing the upper case 2 among the disk drive devices 100 concerning 1st Embodiment of this invention. FIG. 2 is a schematic cross-sectional view in the AA direction when the upper case 2 of the disk drive device 100 shown in FIG. 1 is being opened. FIG. 3 is a plan view showing a positional relationship between a positive pressure filter 9 and a positive pressure filter chamber 6 shown in FIG. 2. 4 is a cross-sectional view schematically showing the flow of air in the housing 1 when the optical disk 20 is rotationally driven. FIG. It is a top view at the time of removing the upper case 2 among the disk drive devices 200 concerning 2nd Embodiment of this invention. FIG. 6 is a schematic cross-sectional view of the upper case 2 of the disk drive device 200 shown in FIG. 5 in the AA direction. It is the top view which showed the positional relationship of the positive pressure filter 9 and the positive pressure filter chamber 6 which are shown in FIG. It is a top view at the time of removing the upper case 2 among the disk drive devices 300 concerning 3rd Embodiment of this invention. FIG. 9 is a schematic cross-sectional view of the upper case 2 of the disk drive device 300 shown in FIG. 8 in the AA direction. FIG. 10 is a plan view showing the positional relationship between the positive pressure filter 9 and the positive pressure filter chamber 6 shown in FIG. 9. It is the perspective view which showed typically the inside of the positive pressure filter chamber 6 in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Housing 1a ... Gap 2 ... Upper case 3 ... Lower case 5 ... Lock claw 6 ... Positive pressure filter chamber 6a ... Projection part 6b ... Beam part 7 ... First opening part 8 ... Second opening part 9 ... Positive Pressure filter 10 ... Pickup unit 11 ... Spindle motor 12 ... Disc mounting part 16 ... Circulating filter chamber 17 ... Inlet 18 ... Discharge port 19 ... Circulating filter 20 ... Optical disk 21 ... Tray unit 32 ... Slot 33 ... Disc transport mechanism 37 ... Shielding Member 100, 200, 300 ... disk drive device

Claims (4)

A reproduction mechanism having a mounting unit for mounting a disk-shaped recording medium, a spindle motor unit for rotationally driving the mounted recording medium, and a pickup mechanism capable of reproducing a signal recorded on the rotationally driven recording medium When,
A housing containing the reproduction mechanism;
A first dust collecting filter chamber which is provided on a rear side of the upper surface of the housing and is substantially perpendicular to the mounting portion and accommodates the first dust collecting filter; and the first dust collecting filter chamber which is provided on the upper surface of the housing. A first opening for communicating the dust collection filter chamber and the outside of the housing, and the first dust collection filter chamber on the opposite side of the first opening with respect to the first dust collection filter The first dust collection filter is provided so as to be covered by the first dust collection filter, and has a second opening for communicating the first dust collection filter chamber with the inside of the housing. A gas is introduced into the housing from a direction substantially perpendicular to the recording surface of the recording medium when the recording medium is rotationally driven through a filter, and the centrifugal force of the swirling airflow generated by the rotational driving of the recording medium is utilized. The peripheral portion of the recording medium in the casing And a gas introduction part to lead,
A slot provided on a side surface of the housing for inserting and ejecting the recording medium;
A transport mechanism that is provided above the pickup mechanism in the housing and transports the recording medium between the slot side and the mounting portion side;
The recording medium is provided so as to protrude from the first dust collection filter chamber toward the mounting portion, and comes into contact with the recording medium when the recording medium transported by the transport mechanism is mounted on the mounting portion. A protrusion for assisting the mounting,
The first dust collecting filter chamber has a plurality of beam portions that form the second opening and support the protruding portion. The disk drive device according to claim 1,
A second dust collection filter chamber provided in the housing and containing a second dust collection filter;
An inlet that is provided in the second dust collection filter chamber and introduces a swirling airflow generated in the housing by the rotational drive of the recording medium by the reproduction mechanism;
A disk drive device, further comprising: a discharge port provided in the second dust collection filter chamber and configured to discharge the swirling airflow introduced from the introduction port into the housing. The disk drive device according to claim 2,
The first dust collecting filter has a first filtration efficiency and a first pressure loss;
The disk drive device, wherein the second dust collecting filter has a second filtration efficiency lower than the first filtration efficiency and a second pressure loss lower than the first pressure loss. A reproduction mechanism having a mounting unit for mounting a disk-shaped recording medium, a spindle motor unit for rotationally driving the mounted recording medium, and a pickup mechanism capable of reproducing a signal recorded on the rotationally driven recording medium When,
A housing containing the reproduction mechanism;
A dust collecting filter chamber dust collecting filter provided in a direction substantially perpendicular of the mounting portion a rear side of the housing upper surface is accommodated, and said dust collecting filter chamber and the outside of the housing provided on the upper surface of the housing a first opening for communicating, of the dust collecting filter chamber, on the opposite side of the first opening to the dust collecting filter is provided so as to be covered with the dust collecting filter, the current A second opening for communicating between the dust filter chamber and the inside of the housing, and when the recording medium is driven to rotate through the dust collection filter , the recording medium has a recording surface from a direction substantially perpendicular to the recording surface. A gas introduction unit that introduces a gas into the housing and guides the introduced gas to a peripheral portion of the recording medium in the housing by using a centrifugal force of the swirling airflow generated by the rotation driving of the recording medium;
A slot provided on a side surface of the housing for inserting and ejecting the recording medium;
A transport mechanism that is provided above the pickup mechanism in the housing and transports the recording medium between the slot side and the mounting portion side;
Provided so as to protrude from the dust collecting filter chamber toward the mounting portion and assists the mounting of the recording medium by contacting the recording medium when the recording medium transported by the transport mechanism is mounted on the mounting portion A disk drive device having a protrusion for
A control unit for controlling the drive of the disk drive device,
The dust collection filter chamber includes a plurality of beam portions that form the second opening and support the protruding portion.