JP4301109B2 - Dust-proof mechanism of optical disk device - Google Patents

Description

  The present invention relates to a dust-proof mechanism having a door portion that moves up and down in conjunction with an operation of loading (loading) an optical disk device into an optical disk device or ejecting it to the outside of a tray on which an optical disk stored in a cartridge or a single optical disk is placed. It is about.

  In the conventional disk device that can use the cartridge, the tray is unloaded from the apparatus main body, the cartridge containing the disk is placed on the tray, the tray is loaded again into the apparatus main body, and the shutter of the cartridge is opened, for example. The traverse base on which the spindle motor, which is the disk rotation means in the main body of the device, is mounted relatively close to the cartridge, the disk in the cartridge is placed on the spindle motor, and the disk is rotated with the disk floating in the cartridge. Let The optical pickup provided on the traverse base reads (reproduces) the signal from the disk, or writes (records) the signal on the disk.

By the way, if dust adheres to the optical disk, optical pickup lens, or optical system, the amount of light during light emission or reception decreases and normal recording and reproduction cannot be performed, resulting in problems such as frequent replacement of the optical disk and forced lens cleaning. There is. Therefore, as a first conventional example, a loading mechanism for transporting a bare disk or a cartridge and a damper for shutting off external and internal vibrations with respect to the housing with a sealed structure for the entire traverse base portion for recording / reproducing on the optical disk. There was something to support (see Patent Documents 1 and 2). In addition, as a second conventional example, the dust flow path from the opening of the housing to the optical disk, the lens of the optical pickup, and the optical system is analyzed, and the entry of dust into the disk motor that generates negative pressure by rotation is prevented. Some have provided a filter for dust removal in the middle (see Patent Document 3).
Japanese Patent Laid-Open No. 03-113792 Japanese Patent Laid-Open No. 09-007267 JP-A-11-296950

  As in the first conventional example, in the configuration in which the casing (fixed side) attached to the personal computer, the cartridge disk or bare disk transport means, and the recording / reproducing means (movable side) are separated by a damper, the fixed side Since it was necessary to provide a gap for vibration at the time of impact between the movable side and the movable side, a completely sealed structure could not be taken.

  In addition, even with a dustproof function as in the second conventional example, when the disk is rotated at a high speed by a spindle motor, the inside of the apparatus becomes negative pressure, and dust and smoke are sucked toward the center of the spindle motor. As a result, dirt and smoke entering from the gap in the opening of the housing allow the recording / reproducing surface of the disc and the lens to become dirty over time.

  As described above, for the dust-proof structure, it is desirable to seal the entire opening, fixed side, and movable side of the housing. However, in general, when the airtightness of the recording / reproducing apparatus is increased, the temperature inside the storage chamber rises. Due to the restriction on the guaranteed temperature of recording and reproducing disks and the guaranteed temperature of semiconductor elements such as laser light emitting elements and large-scale LSIs, It is necessary to carry out control to suppress driving of the optical pickup feed motor, which hinders improvement in performance of high-speed writing and high-speed feeding. In order to maintain the above performance, it is necessary to take heat dissipation measures such as providing an external fan for cooling, leading to an increase in cost.

  A first object of the present invention is to provide a dustproof mechanism that achieves both dustproof performance and reduced internal temperature in an optical disc apparatus.

  Further, in the loading mechanisms of the first and second conventional examples using the cartridge, the front surface of the cartridge placing means such as a tray or a holder has an open shape. Since the disk end face is easily touched when the disk is opened, a function for preventing the opening and closing of the door member at the time of erroneous operation is required due to the problem of data recording quality and safety problems such as burns.

  A second object of the present invention is to provide a dustproof mechanism that achieves both dustproof performance and erroneous operation prevention in an optical disc apparatus.

  The dust-proof mechanism of the present invention is provided in a tray on which an optical disk is placed, an apparatus main body that holds the tray so that it can be loaded and unloaded, drive means that is provided in the apparatus main body and drives the tray to be carried in and out, and an apparatus main body. And a disk rotating means for rotating the disk carried by the tray, an optical pickup for recording or reproducing on the optical disk, a storing means for storing the rotating means and the optical pickup, and a detachable means provided in the apparatus main body. A door and opening / closing means for opening and closing the door in conjunction with the storage means are provided, and the vicinity of the pickup is made a sealed space by the door.

  The dust-proof mechanism of the present invention is provided in a tray on which an optical disk is placed, an apparatus main body that holds the tray so that it can be loaded and unloaded, drive means that is provided in the apparatus main body and drives the tray to be carried in and out, and an apparatus main body. And a disk rotating means for rotating the disk carried by the tray, an optical pickup for recording or reproducing on the optical disk, a storing means for storing the rotating means and the optical pickup, and a detachable means provided in the apparatus main body. It is equipped with a door and an opening / closing means that opens and closes the door in conjunction with the storage means, and by using this door as a sealed space around the pickup, dust can be prevented from entering the loading device, and recording and reproduction can be performed even in a time-dependent change. Performance can be secured.

By constructing an optical disk recording or playback circuit board outside the sealed space around the pickup, dust can be prevented from entering the loading device and the internal temperature can be prevented from rising. It is possible to ensure recording / reproduction performance over time.
By providing an exhaust port in at least one location of the device body, dust can be prevented from entering the loading device, and radiant heat from the sealed structure and natural convection due to heat conduction, and exhaust of radiant heat from members other than the sealed structure can be prevented. Therefore, it is possible to prevent an increase in the internal temperature.
By providing heat exhausting means at a position close to the apparatus main body, dust can be prevented from entering the loading device, and radiant heat and heat conduction from the sealed structure can be exhausted by external heat exhausting means. It is possible to prevent the internal temperature from rising.

  By providing holding means for positioning and holding the cartridge containing the disk in the tray and opening / closing means for opening and closing the shutter of the cartridge when the tray is loaded / unloaded, not only a bare disk but also a cartridge can be used. In addition to improving the dustproof performance of the disc, it prevents dust from adhering to the disc surface when not in use.

  By providing a member that engages with the door in the drive means for loading and unloading the tray, when the door is engaged with the housing to form a sealed space, the door is surely pressed against the housing and the degree of sealing around the pickup is increased. It is possible to raise.

  By providing a member that comes into contact with the door when the door is misoperated in the drive means for loading and unloading the tray, the loading operation will not be completed when the door is open, so that the disk does not rotate, and when the disk end surface is touched due to misoperation It becomes possible to prevent burns and loss of recorded data.

  By providing a cartridge pressing member in the door driving means, it is possible to prevent vibrations of the tray and the cartridge during the rotation of the disk and to secure a predetermined gap between the disks in the cartridge.

  An embodiment of a dustproof mechanism for a disk device according to the present invention will be described with reference to FIGS. FIG. 1 shows an external appearance of the present invention, which includes an apparatus main body 1, an upper lid 100, and a front lid 30 provided on the main body 1. An exhaust hole 100 a is provided behind the upper lid 100. FIG. 2 shows a state in which the upper lid 100 of the disk device is removed, and shows the apparatus main body 1 and the tray 3. The tray 3 is for loading a bare disk or a cartridge containing the disk and carrying it in and out of the apparatus main body 1. The figure is in a loaded state and is located on the traverse 2 in the apparatus main body 1.

  The apparatus main body 1 has a box frame shape, and an attachment portion 4 is provided outside the corner portion. The tray 3 is slidably held in the loading / unloading direction of the apparatus main body 1, and the tray 3 has a size on which a cartridge containing a disk can be placed, and a spindle motor which is a rotating means in the approximate center. And a hole 70 into which the optical pickup is inserted, and recesses 5 and 6 are formed at positions including the hole 70 for placing bare disks having two types of diameters. Further, both side walls 7 for guiding both sides of the cartridge are provided on both sides of the tray 3, but there is no front wall and a cartridge stopper 8 is provided on the back side. A shutter opening / closing member 9 is provided on the back side of the stopper 8 so as to be movable in the width direction. In particular, an alignment member 10 for positioning the cartridge is provided in the corner portion at the front end of the tray 3 so as to be immersed.

  3 to 5 show details of the apparatus main body 1. Inside the both side walls of the apparatus main body 1 are guide support portions 11 that guide the conveyance of the tray 3. A loading mechanism 12 is provided at the front end of the apparatus main body 1, and a side arm 14 is pivotally supported on a shaft 13 provided outside both side walls. That is, a front wall 73 and a partition wall 74 are provided on the front side of the apparatus main body 1 with a space 74a (see FIG. 28), and the partition wall 74 is a slide that is a lifting means for moving the traverse 2 up and down. A cam 23 is slidably provided, and a loading motor 19, a pulley 20, an intermediate gear 21, and a loading gear 22 that constitute the loading mechanism 12 for conveying the tray 3 are disposed in the space 74 a. Exhaust holes 1a are provided on both sides of the rear portion of the apparatus main body 1 so as to penetrate the apparatus main body 1, and engage with the exhaust holes 100a (see FIG. 1) of the upper lid 100 so that the inside of the traverse 2 has a sealed structure. A flow path for discharging hot air due to staying and radiation on the lower surface of the traverse 2 is formed.

  The side arm 14 has a cartridge pressing portion 15 extending into the apparatus main body 1 from above the side wall, a traverse engaging portion 16 extending into the apparatus main body 1 from below the side wall, and further provided with a front lid opening / closing portion 17. Then, when the cartridge is carried into the apparatus main body 1 by the tray 3, it is rotated and biased by the spring 18 so that the upper surface of the cartridge is pressed toward the tray 3 by the cartridge pressing portion 15 in conjunction with the raising operation of the traverse 2 described later. Has been.

  The front cover 30 protects the inside by closing the tray 3 of the apparatus main body 1 and the opening 31 through which the cartridge enters and exits when the tray 3 is loaded. The front lid 30 is provided with bearings 32 on both sides, is supported by a shaft 33 provided on the front side of the shaft 13 at the front end of both side walls of the apparatus body 1, and is provided, for example, in a convex shape closer to the shaft 13 than the bearing 32. For example, the connecting portion 34 is pivotably fitted to and connected to the concave front lid opening / closing portion 17. Further, the front lid 30 is biased in the closing direction by a spring 113 using, for example, a torsion coil spring supported by the bearing 32.

  A circuit board 28 on which various control circuits required for the disk device are mounted is attached to the lower surface of the front end portion of the apparatus main body 1, and the loading motor 19 and the like are controlled. The state detection switches 80 and 81 provided on the circuit board 28 are operated by a rear end portion of a state detection lever, which will be described later, fitted in a detection hole of the cartridge. The state detection switch 212 detects the state of loading / unloading of the tray 3 and is operated by a projection-like operation unit 213 provided at the lower part of the slide cam 23.

  6 to 8 show an upper lid that closes the upper end opening of the apparatus main body 1. A plate 102 is attached to the lower surface of the upper lid 100. An intermediate portion of the clamp arm 101 is urged and held on the plate 102 so as to rotate in one direction by a spring 103 using, for example, a wire spring. At the rear end of the clamp arm 101, a receiving portion 105 that is pushed up by the carry-in operation of the tray 3 by a push-up portion 104 provided at the rear end of the tray 3 is bent, and a clamper is provided in the through hole 101a at the tip of the clamp arm 101. 106 is provided. The clamper 106 is composed of members 107 and 108 that can be divided into two upper and lower parts. By connecting the two, the clamper 106 is sandwiched between the edges of the through hole 101a, and a plate 109 and a magnet 110 are interposed therebetween. A shutter opening / closing groove 111 is provided on the lower surface of the upper lid 100. The magnetic material is used for the clamp arm 101 to form a magnetic circuit with the plate 109 and the magnet 110, and the clamper 106 is magnetically levitated so that the member 107 is in contact with the clamp arm 101. It is provided so as not to protrude from the lower surface of 100.

  9 to 11 show the details of the loading mechanism section 12. The driving pulley 19 a of the loading motor 19 and the pulley 20 are connected by a belt 24, and the small gear 20 a provided on the pulley 20 meshes with the large gear of the intermediate gear 21. The small gear 21 a of the intermediate gear 21 is engaged with the large gear 22 a of the loading gear 22 and is decelerated. The slide cam 23 is provided with a rack 25 that can mesh with the loading gear 22 from a position disengaged, and a pair of substantially Z-shaped cam grooves 26 are formed on the surface of the slide cam 23 facing inward of the apparatus body 1. Further, an engaging portion 27 is projected from the upper surface of one end in the sliding direction.

  Reference numerals 75 and 76 denote state detection levers of the cartridge that operate when the state detection switches 80 and 81 are operated when the cartridge has a hole indicating the state and the cartridge is fitted into the hole. For example, in a DVD-RAM cartridge, one lever corresponds to an active side detection hole, and the other corresponds to a write prohibition detection hole. Normally, the slide arm 78 is urged by the link arm 78 urged by the spring 78a to move away from the cartridge in the tray 3, and the slide cam is fitted in the positioning hole of the cartridge as will be described later. The link arm 78 releases the press of the state detection levers 75 and 76 in conjunction with the operation of the movement 23, and rotates toward the cartridge by the restoring action of the spring provided in each lever.

  12 to 14 show details of the tray 3. A support shaft 41 is provided on the surface side of the tray 3 on the inner side of both side walls and on the back side of the stopper 8, and an intermediate portion of the cartridge holding member 42 is supported on the support shaft 41. The front end portion of the cartridge holding member 42 is positioned in front of the stopper 8, a substantially chevron-shaped hooking portion 44 projects from the inner surface, and a spring 43 using, for example, a coil spring is compressed between the tray 3 and the rear end portion. Then, the hooking portion 44 is urged in the direction in which the hooking portion 44 advances, that is, the direction in which the pair of hooking portions 44 approach each other. The tip of the cartridge holding member 42 is disposed outside the recess 6 and does not interfere with the placement of the bare disk. On the other hand, engaging recesses 54 are formed on both ends of the end of the cartridge 77, that is, the end on the insertion side. When the front end of the cartridge 77 is inserted along the surface from the front of the tray 3, the cartridge holding member 42 is first inserted at the front end. When the tip is pushed and rotated, and the hooking portion 44 is positioned in the engaging recess 54, it is engaged and held by the restoring action of the spring 43. At this time, since the hooking portion 44 is inclined in a mountain shape, for example, when the engaging portion 54 is engaged, the inclined surface causes the cartridge 77 to be pulled inward of the tray 3. The positioning of the cartridge 77 will be described later. The shutter opening / closing member 9 is provided so as to be slidable in the width direction of the tray 3 as described above. Reference numeral 9 a denotes an engaging portion that slidably engages with a guide groove 111 provided on the lower surface of the upper lid 100.

  A guide groove 48 is provided on one side of the back side of the tray 3 to guide a protruding engagement portion 27 provided on the slide cam 23, and a tray front end side end 51 of the guide groove 48 extends in the width direction of the tray 3. The bent portion is an inclined portion 50 of approximately 45 degrees. On the other side of the tray 3, a rack gear 49 that meshes with the loading gear 22 is disposed in parallel with the guide groove 48. Therefore, when the loading motor 19 is operated, the loading gear 22 is decelerated and rotated via the belt 24, the pulley 20 and the intermediate gear 22, thereby driving the rack gear 49, and the tray 3 is moved along the main body 1 of the loading motor 19. Carry in or out depending on the direction of rotation. In this case, in the carry-in operation of the tray 3, when the engaging portion 27 moves to the inclined portion 50, the slide cam 23 starts to slide in the width direction of the tray 3, and at the same time the end portion of the rack 25 starts to mesh with the loading gear 22. When the engagement part 27 moves to the front end side end 51 of the guide groove 48 due to the engagement of the rack 25 when the rack 25 is disengaged, the operation of the tray 3 in the loading / unloading direction is stopped. Note that the rack 25 and the rack gear 49 mesh with the loading gear 22 while being shifted from each other in the axial direction. When the tray 3 is unloaded, if the loading motor 19 is rotated in the reverse direction, the slide cam 23 is first driven by the rack 25 from the operation opposite to the above, that is, from the stop position of the tray 3, and the engaging portion 27 is the inclined portion of the guide groove 48. 50, the tray 3 starts to carry out, the loading gear 22 meshes with the rack gear 49, and the tray 3 carries out. Then, the traverse 2 described later is raised by the operation interlocking with the loading direction of the slide cam 23, and the link arm 78 releases the pressing of the detection levers 75 and 76. On the other hand, since the engaging portion 9a of the shutter opening / closing member 9 of the tray 3 is guided by the guide groove 111 of the upper lid 100 by the carry-in operation of the tray 3, the shutter opening / closing member 9 moves and the cartridge 77 is placed on the tray 3. If so, the shutter is opened by the operation portion 9b of the cartridge 77. Further, near the loading completion position of the tray 3, the push-up unit 104 pushes up the receiving portion 105 of the clamp arm 101, whereby the clamper 106 is lowered and is positioned on the disk in the opened shutter.

  15 and 16 show the traverse 2. The traverse 2 is equipped with a spindle motor 60 which is a disk rotating means and an optical pickup 61. The traverse 2 includes a traverse base 83, a traverse plate 84 attached to the traverse base 83, and a cover plate 62. A traverse plate 84 is attached to the traverse base 83 via a vibration absorbing elastic body 88 attached by a fixture 94. The traverse plate 84 is provided with a hole 84a in the center, a spindle motor 60 is attached to the front end, and an optical pickup motor 89 and a screw (spiral) groove interlocking with the motor 89 so as to be positioned on one side of the hole 84a. The connected drive shaft 90 is attached to the traverse plate 84, and a pair of guide shafts 91 and 92 are installed in parallel with the drive shaft 90 in the hole portion 84a by the attachment 93, and the optical pickup 61 is slidably guided thereto. A female threaded engaging portion 61 a that engages with the drive shaft 90 is attached to the optical pickup 61. The cover plate 62 is attached to the traverse plate 84 by a damper 97 and surrounds a range including the spindle motor 60 and the optical pickup 61, and has a function of reducing the vibration amplitude of the disk at the time of high rotation. Reference numeral 95 denotes a flexible lead for connecting the optical pickup 61 and the circuit board 28, and penetrates the central through portion 83 a of the traverse base 83. A positioning member 95a is provided at the main back portion of 95, maintains the proper movement R of the lead 95, and also has a dustproof function of the traverse base 83. Reference numeral 96 denotes a member that is attached to the lower surface side of the traverse base 83 and supports the flexible lead 95.

  Since the traverse base 83 is pivotally attached to the apparatus main body 1 on both sides of the base end, for example, a shaft 85 is provided, and a bearing 86 (see FIG. 3) is provided on the apparatus main body 1. Further, a pair of cam engaging portions 87 project from the front surface of the front end portion of the traverse base 83 and engage with the cam groove 26 (see FIGS. 4 and 10) of the slide cam 23. Accordingly, the traverse base 83 rotates so that the tip of the traverse base 83 rises according to the slide interlocked with the above-described tray insertion direction of the slide cam 23 and descends according to the slide interlocked with the carry-out direction of the tray 3. . As a result, the traverse base 83 is raised in the process in which the slide cam 23 moves to the final position after the tray 3 is carried into the apparatus main body 1, and the spindle motor 60 enters the cartridge 77 with the shutter open, and the disc is placed on the turntable. Simultaneously with the loading, the clamper 106 is pressed against the lowered clamper 106, and the magnetic body provided on the turntable of the spindle motor 60 and the magnet 110 of the clamper 106 are attracted with the disk interposed therebetween. Further, as the traverse 2 rises, the optical pickup 61 approaches the disk in the shutter that is open so that signals can be read or written.

  17 to 19 show the positioning after the tray 3 is carried. On one side of the traverse base 83, for example, a positioning portion 99 for positioning the loaded tray 3 is provided so as to project. The receiving part 210 fitted to the positioning part 99 is recessed, for example, on the back surface of the tray 3. 17 and 18 show a state in which the tray 3 is carried into the apparatus main body 1 by the loading motor 19 and stopped, but the traverse 2 has not yet been raised by the slide cam 23. FIG. 19 shows a state in which the traverse 2 is raised by the slide cam 23, whereby the positioning portion 99 is fitted and positioned in the receiving portion 210 of the tray 3.

  20 to 23 show the relationship among the traverse 2, the side arm 14, and the front lid 30. 20 and 21 show a state in which the tray 3 is carried out or a state in which the traverse 2 has not been raised after being carried in. At this time, since the traverse receiver 16 is pushed downward by the traverse 2, the traverse receiver 16 rotates around the shaft 13 to raise the cartridge pressing portion 15 and the front lid opening / closing portion 17, and the front lid 30 is moved to the spring 113 around the shaft 33. The tray opening 31 of the apparatus main body 1 is opened by rotating so as to move down against it.

  22 and 23 show a state in which the traverse base 2 is raised by the operation of the slide cam 23 when the tray 3 is completely loaded. At this time, the side arm 14 is reversely rotated by the spring 18 so that the traverse receiver 16 follows the traverse 2, the cartridge 77 loaded with the cartridge pressing portion 15 is pressed against the tray 3, and the front lid opening / closing portion 17 is lowered. The front lid 30 rises around the shaft 33, and the spring 113 assists to close the opening 31. On the other hand, since the traverse 2 is first lowered when the tray 3 is carried out, the state shown in FIGS. 20 and 21 is established, so that the front lid 30 closes the opening 31 only when the tray 3 is carried into the apparatus main body 1. At the same time, the side arm 14 can hold the cartridge 77 against the tray 3.

  The slide cam 23 is provided with a member 23a that engages with an end surface 30a (see FIGS. 21 and 22) of the front lid 30. When the tray 3 is carried into the apparatus main body 1, the front lid 30 is attached to the main body 1 and the upper lid. 100 can be mechanically pressed to increase the sealing degree around the disc and the pickup 61. In this state, since the front door 30 is fixed by the member 23a of the slide cam 23, it is possible to prevent burns and the loss of recorded data when the disk end surface is touched due to an erroneous operation of the front door 30.

  Further, by providing the front cover 30 with a contact surface 30b that contacts the member 23a of the slide cam 23 when the front cover 30 is erroneously operated, the operation of the slide cam 23 is prevented when the loading of the tray 3 is completed. Since the unit 213 cannot operate the state detection switch 212 and does not reach the system operation of rotating or recording or reproducing the disc, it prevents burns when the front end of the front door 30 is erroneously touched or prevents loss of recorded data. be able to.

  24 to 32 show the positioning of the cartridge 77 on the tray 3. The cartridge 77 has a positioning hole (not shown) on one side of the front end, and the tray 3 has an alignment member 121 that fits in and out of the positioning hole on one side of the front end corresponding to the positioning hole. Have. The apparatus main body 1 has push-up means 140 for fitting the alignment member 121 into the positioning hole when the tray 3 is carried into the apparatus main body 1. The alignment member 121 is formed by an alignment pin 123 that extends a lever 122 in the radial direction, and the tray 3 has a buried hole 124 that accommodates the alignment pin 123 exposed on the back side of the lever 122, and the alignment pin 123 and the buried hole 124. Sliding inclined portions 125 and 126 are formed so as to come into sliding contact with each other so that the alignment pin 123 moves in and out of the embedded hole 124 by pushing the lever 122 and rotating the alignment pin 123 about the axis. Further, when the tray 3 is carried into the apparatus main body 1, the alignment member 121 is engaged with the lever 122 by the carrying-in operation of the tray 3 to rotate the alignment pin 123 to fit the alignment pin 123 into the positioning hole. Part 128.

  The lever 122 rotates in parallel with the back surface of the tray 3 between a posture substantially perpendicular to the loading direction of the tray 3 and a posture inclined in the loading direction. The sliding inclined portions 125 and 126 are aligned. The pin 123 is set so as to protrude from the tray 122 in a substantially right-angled posture of the lever 122 and to be immersed in the tray 3 in a tilted posture of the lever 122, and the alignment pin 123 is provided with a spring 127 that biases the lever 122 in a tilted posture. The push-up means 140 is engaged with the lever 122 by the carry-in operation of the tray 3 and rotates the lever 122 in a substantially perpendicular posture against the spring 127, and in the carry-in operation of the tray 3 There is a second engagement piece 131 that engages with the lever 122 in a substantially right-angled posture by the unloading operation of the tray 3 without being engaged with the lever 122 and rotates in an inclined posture. . Each figure will be described below with reference to the drawings.

  FIG. 24 shows an alignment member 121, in which a recess 123a is formed on the lower surface of the alignment pin 123, and a collar 128 is formed on the outer periphery of the intermediate portion. The sliding inclined portion 125 is formed by an inclined surface at a symmetrical position around the alignment pin 123 on the lower surface of the collar 128. Further, a spring receiving portion 129 is provided on the side surface of the lever 122, and a spring receiving portion 130 is projected from the side opposite to the lever 122 of the alignment pin 123. 131 is a spring guide part.

  FIG. 25 shows a buried hole 124 that is formed in the tray 3 and accommodates the alignment member 121. The buried hole 124 is a circular bottomed hole. An anti-tilt sliding pin 132 is provided at the center of the bottom, and the sliding inclined portion 126 is formed by a protruding portion that is provided at a symmetrical position with the sliding pin 132 as the center and is in sliding contact with the inclined surface (125). An opening 133 communicating with the back surface of the tray 3 is formed on the inner peripheral surface.

  FIG. 26 shows a state in which the alignment member 121 is housed in the embedded hole 124 and viewed from the back side of the tray 3. The alignment pin 123 is provided with, for example, a torsion coil spring 127 that is torsionally biased so as to rotate in a direction to be inserted into the embedded hole 124. The winding portion of the torsion coil spring 127 is passed through the alignment pin 123 and engaged with the spring receiving portion 130, both ends are hooked on the spring receiving portion 129 of the lever 122, and the lever 122 is passed from the upper surface of the tray 3 to the back surface through the opening 133. The alignment pin 123 is accommodated in the embedding hole 124 accommodating portion. One end of the torsion coil spring 127 is removed from the spring receiving portion 129 of the lever 122 and is engaged with the spring receiving portion 134 on the back surface of the tray 3. At this time, the concave portion 123 a is fitted into the tilt-preventing sliding pin 132, and the outer periphery of the collar 128 is in sliding contact with the inner peripheral surface of the hole 124, and the inclined surface of the sliding inclined portion 125 is in sliding contact with the sliding inclined portion 126. As a result, the alignment pin 123 rotates without falling along the inner peripheral surface of the concave portion 123a and the embedded hole 124 as the lever 122 rotates, and slides at the sliding inclined portions 125 and 126 and moves the alignment pin 123. Although the upper end can be projected and retracted on the surface of the tray 3, the tip of the lever 122 is locked by a spring 127 to a first stopper 135 provided on the back surface of the tray 3. At this time, the lever 122 is set so as to be inclined at approximately 45 degrees with respect to the loading / unloading direction (arrow A) of the tray 3 and slides so that the tip of the alignment pin 123 is immersed from the surface of the tray 3. Inclined portions 125 and 126 are set.

  FIG. 27 shows a state where the lever 122 is rotated against the torsion coil spring 127 and is locked to the second stopper 136 provided on the back surface of the tray 3. At this time, the lever 122 is substantially perpendicular to the loading / unloading direction of the tray 3, and the tip of the alignment pin 123 protrudes from the surface of the tray 3.

  28 and 29 show the push-up means 140 of the apparatus main body 1. When the tray 3 is carried into the apparatus main body 1, the push-up means 140 is engaged with the lever 122 by the carrying-in operation of the tray 3 and rotates the alignment pin 123 to fit the alignment pin 123 into the positioning hole. The push-up means 140 has a first engagement piece 130 and a second engagement piece 131. The first engagement piece 130 is engaged with the lever 122 by the carry-in operation of the tray 3 and rotates the alignment pin 123 in a protruding direction against the spring 127. The second engaging piece 131 does not engage with the lever 3 in the loading operation of the tray 3, and engages with the lever 3 in a substantially perpendicular posture in the carrying-out operation of the tray 3 to reversely rotate the lever 3 to the inclined posture. In other words, it is located on the side of the carry-out direction from the first engagement piece 130 and passes through the tip of the lever 122 by the carry-in operation of the tray 3 so as to cross the rotation locus of the lever 122.

  30 and 31 illustrate the operation of the alignment member 121. FIG. FIGS. 30A and 30B show a state where the cartridge is placed on the tray 3, the tray 3 is carried into the apparatus main body 1, and the lever 122 hits the first engagement piece 130. Up to this point, the tip of the alignment member 121 has not been immersed out of the surface of the tray 3. 30 (c), 30 (d), 31 (a), and 31 (b), the tray 3 continues to carry in, and the lever 122 is pushed by the first engagement piece 130 to rotate, and the alignment member 121 is rotated. This is a state in which the tip of the plate protrudes from the surface of the tray 3. FIGS. 31C and 31D show a state in which the tray 3 completes the carry-in operation, and at the same time, the lever 122 rotates approximately 45 degrees and faces the second engagement piece 131. At this time, the tip of the alignment member 121 Protrudes to the maximum from the surface of the tray 3 and fits into the positioning hole of the cartridge 77. As a result, the cartridge 77 is positioned on the tray 3, but since the cartridge 77 is pressed by the side arm 14, it is reliably positioned and fixed. On the other hand, when the tray 3 is unloaded, the reverse operation described above, that is, the action of the torsion coil spring 127 (not shown in FIGS. 30 and 31 is not shown) due to the lever 122 being separated from the first engagement piece 130. As a result, the lever 122 returns and rotates, so that the tip of the alignment member 121 is disengaged from the positioning hole of the cartridge and enters the embedded hole 124 of the tray 3.

  FIG. 32 illustrates a case where the lever 122 is caught in the loaded state of the tray 3 and does not return with the torsion coil spring 127. That is, when the first engagement piece 130 moves away from the lever 122 during the carry-out operation of the tray 3, the second engagement piece 131 hits the lever 122 and forcibly pushes the lever 122 in the return direction, and returns to the original position as indicated by the arrow. Return to As a result, the lever 122 is always returned when the tray 3 is carried out, so that the tip of the alignment member 121 is immersed from the surface of the tray 3, and the cartridge 77 is caught by the alignment member 121 when the tray 3 is carried out. It can be taken out without. The alignment member 121 performs the same operation as described above even when a bare disk instead of the cartridge 77 is placed on the tray 3 and carried in, but the bare member is always immersed when the tray 3 is carried out. It does not become an obstacle to the attachment / detachment operation.

  Further, since the timing at which the alignment pin 123 engages with the cartridge 77 is during conveyance of the tray 3, for example, the mechanical load during loading can be designed to be small. Since the alignment pin 123 is attached to the embedding hole 124 from above, it is difficult to come off by pressurizing the tray 3. Moreover, since there are no extra holes or protrusions in the tray 3 or the like, the appearance is good.

  Since the cartridge holding member 42 that holds the cartridge 77 at the mounting position of the tray 3 is provided, the positioning of the cartridge 77 is further ensured, and the mounting feeling of the cartridge 77 can be produced.

  FIG. 33 is an external cross-sectional perspective view of an embodiment of the present invention. Since the spindle motor 60 and the pickup 61 are stored in a sealed space formed by the apparatus main body 1, the front lid 30, the upper lid 100, and the traverse 2, the vicinity of the spindle motor 60 becomes negative pressure by the rotation of the disk and enters from the outside of the apparatus. It is possible to prevent contamination of optical components such as the disk surface and the objective lens of the pickup 61 due to dust and smoke. In addition, a sufficient space is provided around the circuit board 28 so that the upper and lower sides are exposed to the outside air so as to be exposed to the outside of the apparatus body 1 to prevent an increase in temperature inside the apparatus due to the heat radiation of the IC on the board and the radiation heat of the board.

  FIG. 34 shows an external cross-sectional view of an embodiment of a disk device using the dustproof mechanism of the present invention. A fan 300 is provided behind the exterior housing 301, and the dust-proof mechanism of the disk device of the present invention is housed therein. The arrows in the figure indicate the wind flow. The fan 300 discharges hot air staying in the upper part of the apparatus housing 1 as shown by an arrow. Further, the fan 300 can exhaust hot air around the lower surface side of the traverse 2 and the circuit board 28 through the exhaust port 100a of the upper lid 100 and the exhaust port 1a of the apparatus main body 1. At this time, if the air intake port on the front surface of the exterior housing 301 is selected on the lower surface side of the front door 30, the outside air for cooling can be introduced into the circuit board 28 while preventing the entry of dust. It is more effective to lower.

  In the present invention, the dust prevention mechanism constituted by the apparatus main body 1, the front lid 30, the upper lid 100, and the traverse 2 performs an effective cooling function by the fan 300. Since the intrusion of smoke can be prevented, it is possible to easily prevent the recording / reproducing performance of the optical disc apparatus from deteriorating due to a change with time or an environmental change.

  The dust-proof mechanism of the disk device according to the present invention is capable of transporting and carrying cartridges and bare disks, ensuring both dust-proof performance and reducing the internal temperature of the optical disk device, and recording by a door opening / closing prevention function during erroneous operation. This has the effect of ensuring the quality of data and ensuring the safety of burns, etc., and is useful for the dust-proof mechanism of disk devices.

External appearance perspective view of 1st Embodiment of this invention Perspective view of disk unit Exploded perspective view of the device body Perspective view of the main body with the front lid closed Perspective view of the main body with the front lid open Perspective view of upper lid Exploded perspective view of the upper lid Perspective view of the bottom side of the top lid A perspective view of the loading mechanism as seen from above the front side The perspective view seen from the back side Perspective view from the front lower side Tray perspective view Disassembled perspective view of tray Perspective view from the back side of the tray Perspective view of traverse Exploded perspective view of traverse Plan view of the state before the tray is loaded and the traverse rises FIG. 17 is a partially broken side view. Partially broken side view with the tray loaded and the traverse raised Side view showing the relationship with the front lid before the traverse rises 20 is a perspective view. Side view showing the relationship with the front lid of the trace of the traverse rising The perspective view of FIG. Perspective view of alignment member (A) is a partial plan view in the vicinity of the buried hole of the tray, and (b) is a partial perspective view thereof. (A) is a partial perspective view before the tray is carried in with the lever of the alignment member viewed from the back side of the tray, and (b) is a sectional view thereof. (A) is the partial perspective view of the carrying-in state of the tray which looked at the lever of the alignment member from the back side of the tray, (b) is the sectional view The perspective view which shows the engaging part of an apparatus main body Partial enlarged view of FIG. (A) is a partial rear view of the tray in a state before the carry-in, (b) is a perspective view thereof, and (c) is a tray in a state in which the lever is pushed by the first engagement piece near the completion of the carry-in. (D) is a perspective view thereof. (A) is a partial rear view of the tray in a state where the tray is further close to completion of loading and the lever is pushed by the first engagement piece, (b) is a perspective view thereof, and (c) is a state of completion of loading of the tray. Partial rear view, (d) is a perspective view thereof Partial rear view of the tray for explaining the operation of the second engagement piece when the tray is carried out External sectional perspective view Sectional appearance of the second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Traverse 3 Tray 10 Alignment member 19 Loading motor 23 Slide cam 28 Circuit board 30 Front cover 60 Spindle motor 77 Cartridge 100 Upper cover 122 Lever 123 Alignment pin 124 Buried hole 125 Sliding inclination part 126 Sliding inclination part 130 1st Engagement piece 131 second engagement piece

Claims (6)

An optical disk mounting means;
A housing housing the placement means and having a first axis, a second axis and a third axis ;
Drive means for driving the loading means into or out of the optical disk device;
An optical pickup for recording or reproducing on the optical disc;
Storage means for storing the optical pickup by disposing the first shaft at one end and being rotatably provided on the first shaft, and disposed at the other end with first contact means for contact with door driving means described later. When,
A second abutting means that abuts the first abutting means of the storage means is arranged at one end, and a first engaging member that engages a door described later is arranged at the other end, and the second abutting A door driving means provided with the second shaft in the middle between the first engaging member and the first engaging member, the door driving means being rotatably provided on the second shaft ;
A second engagement member that engages with the first engagement member of the door driving means is disposed at one end, and a front lid is disposed at the other end, and is intermediate between the second engagement member and the front lid. A door provided on the third shaft and rotatably provided on the third shaft ;
When the storage means is lowered, the front cover is lowered by pushing down the second contact means and pushing up the first engagement member, and when the storage means is raised, the second contact A dustproof mechanism for an optical disc apparatus, wherein the front lid is raised by pushing up the contact means and pushing down the first engaging member . 2. A dustproof mechanism for an optical disk device according to claim 1, wherein a recording or reproducing circuit board for the optical disk is formed outside the housing . Dustproof mechanism of the optical disk apparatus according to claim 1 or 2, characterized in that a discharge port to at least one location of the housing. 4. The dustproof mechanism for an optical disc apparatus according to claim 3, wherein a heat exhausting means is provided at a position close to the casing. Holding means for holding the cartridge in said placing unit, dustproof mechanism of the optical disk apparatus according to any one of claims 1 to 4, characterized in that a shutter opening and closing means of the cartridge. Dustproof mechanism of the optical disk apparatus according to any one of claims 1 to 5, characterized in that a pressing member of the cartridge to the door driving means.

Images