JP2011096302A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the need of a set screw for positioning of a protective cover, and to eliminate the need of a spring for adjustment by integrally setting the spring for adjustment and so on for adjustment of a position of a guide shaft. <P>SOLUTION: The protective cover 2 is positioned on a chassis 1 in a horizontal direction with a joining structure of a positioning hole 22 and a positioning projection 12. A bearing mechanism 6 which supports guide shafts 51, 55 is divided into a reference bearing mechanism 60, a first bearing mechanism 70 for adjustment, a second bearing mechanism 90A for adjustment, and a third bearing mechanism 90B for adjustment. The reference bearing mechanism 60 has a reference bearing surface and a spring part which is prepared at the protective cover 2. The first bearing mechanism 70 for adjustment has a recessed corner-shaped bearing surface for adjustment, a side-stroke spring part and a downstroke spring part to push the guide shaft on the bearing surface for adjustment, and a screw for adjustment. The protective cover 2 is linked to the guide shaft with a linking piece. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disk device, in particular, an optical pickup that covers a chassis with a protective cover and is reciprocated in an opening formed in the protective cover, and is disposed horizontally and horizontally in the space between the chassis and the protective cover. The present invention also relates to a disk device provided with a turntable that is guided by a pair of guide shafts and that rotates the disk at a position facing the optical pickup.

  FIG. 9 is a schematic perspective view of a conventional disk device. In the figure, reference numeral 1 denotes a chassis (traverse chassis), 2 denotes a protective cover that covers the chassis 1, and the protective cover 2 is screwed into the chassis 1 using screws 11 at a plurality of locations (three locations in the illustrated example). It has been stopped. Therefore, the disk device of the conventional example requires a plurality of (three in the illustrated example) set screws 11 for positioning the protective cover 2 on the chassis 1.

  In addition, the optical pickup 3 can be reciprocated in a vertically long opening 21 formed in the protective cover 2, and the reciprocating movement is a pair of guide shafts forming a main shaft and a sub shaft (shown in FIG. 1). The turntable 4 is arranged on the outer side (upper side) of the protective cover 2.

  FIG. 10 is a partially longitudinal side view schematically showing an enlarged internal structure of the disk device of FIG. Although the pair of guide shafts described above are arranged horizontally in the space S between the chassis 1 and the protective cover 2 (the horizontal direction is indicated by an arrow X in FIG. 9), the pair of guide shafts in FIG. Only the guide shaft 51 on one side of the guide shafts is shown. A motor 41 for rotationally driving the turntable 4 is mounted on a base plate 42 installed in the chassis 1 and accommodated in the inter-space S. Then, the disk D as a recording medium mounted on the turntable 4 is rotated at a position facing the optical pickup 3 by the motor 41, and the optical pickup 3 moves in the radial direction of the disk D within the opening 21 during the rotation. Then, the optical processing of the recording surface of the disk D is performed. In this type of disk device, a measure of position adjustment of the optical pickup 3 is taken in order to improve the optical performance. The position adjustment of the optical pickup is performed through the position adjustment of the guide shaft 51 on one side and the guide shaft on the other side not shown in the drawing.

In the disk device of the conventional example, a position adjusting function is given to the bearing mechanism 6 supporting the one guide shaft 51 provided in the chassis 1 , and the position adjusting function of the bearing mechanism 6 is used for one side. The position of the guide shaft 51 is adjusted. Although not shown in FIG. 10, the position adjustment function provided to the bearing mechanism 6 provided in the chassis 1 includes a bearing surface, an adjustment spring composed of a coil spring that presses the chassis 1 against the bearing surface, and this adjustment This is achieved by a combination of an adjusting screw that displaces the guide shaft 51 against the biasing of the spring or by the biasing of the adjusting spring. The bearing mechanism 6 provided with such a position adjusting function supports one end and the other end of the guide shaft 51 on the other side, as well as one end and the other end of the guide shaft 51 on the other side. It has been used. Therefore, the disk device of the conventional example requires parts such as an adjustment spring composed of at least four coil springs and four adjustment screws.

  Further, in the disk device of the conventional example, a pair of guide shafts (one guide shaft on one side is denoted by reference numeral 51 in FIG. 10) arranged horizontally in the space S between the chassis 1 and the protective cover 2 in the horizontal direction. The vertical width H1 in consideration of the position adjustment width in advance is required to be given to the inter-space S (the vertical direction is indicated by Y in FIG. 10). For this reason, the thickness dimension of the disk device including the disk D mounted on the turntable 4 is limited to a certain value or less in relation to the built-in space, such as a disk device incorporated in a notebook personal computer or the like. If there is, the gap C1 between the protective cover 2 and the disk D mounted on the turntable 4 may not be sufficiently widened to provide a margin. There was a possibility that an undesired situation may occur that the surface shakes during rotation and interferes with the protective cover 2. Hereinafter, the gap C1 is referred to as a surface runout allowable gap C1.

In the other hand, when an attempt leeway sufficiently wide surface deflection allowing gap C1, so the above mutual space S to impart sufficient vertical width H1 of difficulty, dimensional tolerance of the chassis 1 such As a result, it becomes difficult to secure the gap C2 between the optical pickup 3 and the protective cover 2 in the inter-space S, and as a result, the position adjustment range of the guide shaft may be narrowed. Hereinafter, the gap C2 is referred to as a guide shaft adjusting gap C2. Adjustment of the position of the guide shaft includes adjustment (tilt angle adjustment) of the tilt angle θ of the guide shaft 51 illustrated in FIG.

  On the other hand, in the prior example, in the optical disc apparatus, a measure for preventing the optical disc from interfering with the protective cover even if the optical disc is run out has been proposed by ensuring a sufficiently wide surface run allowance gap (for example, patents). Reference 1). The optical disk device proposed by this Patent Document 1 is shown in FIGS.

  FIG. 11 is a schematic plan view of an optical disc apparatus proposed by Patent Document 1, and FIG. 12 is a partially longitudinal side view schematically showing an enlarged internal structure of the optical disc apparatus. In FIG. 11 and FIG. 12, for convenience of explanation, elements corresponding to the elements of the disk device explained in FIG. 9 and FIG.

As shown in FIG. 11, in this optical disc apparatus, the chassis 1 is covered with a protective cover 2, and the protective cover 2 is fixed to the chassis 1. In addition, contact portions a are formed at four locations of the protective cover 2. These four contact portions a are in contact with one end and the other end of each of the pair of guide shafts 51 and 55 , and as shown in FIG. A hinge portion B having springiness is provided, and the tip of the hinge portion B is elastically contacted with the chassis 1. FIG. 12 shows a state where one abutting portion a is in contact with one end portion of the guide shaft 55.

In addition, another prior example shows a structure for adjusting the height of the guide shaft in which a bearing surface having a corner shape and a leaf spring that presses the guide shaft against the bearing surface are combined (for example, Patent Document 2).

JP 2004-110973 A JP 2006-252684 A

  As described above, in the conventional disk device described with reference to FIGS. 9 and 10, since the protective cover 2 is fixed to the chassis 1 by screws, the position adjustment width of the pair of guide shafts is taken into consideration in advance. If the vertical width H1 is given to the space S between the chassis 1 and the protective cover 2, the surface runout allowable gap C1 cannot be sufficiently widened to have a margin. On the other hand, if the surface runout allowable gap C1 is made sufficiently wide so as to have a margin, it becomes difficult to provide the inter-space S with a sufficient vertical width H1. As a result, it becomes difficult to secure a sufficiently wide guide shaft adjustment gap C2 and the position adjustment range of the guide shaft is narrowed. Therefore, in the conventional disk apparatus, the surface runout allowable gap C1 is sufficiently widened to have a sufficient margin, and a sufficient vertical width H1 is given to the inter-space S so that the guide shaft adjusting gap C2 is sufficient. However, it was a contradictory matter.

  On the other hand, in the optical disk device proposed by the above-mentioned Patent Document 1, since the contact portion A of the protective cover 2 is in contact with the end portion of the guide shaft, the guide shaft 51, The position of the protective cover 2 changes following the height adjustment of 52. For this reason, it is possible to keep the gap (guide shaft adjustment gap) between the optical pickup 3 guided by the guide shaft and the protective cover 2 constant. However, since this Patent Document 1 does not show a bearing mechanism for a guide shaft and a configuration for providing a guide shaft position adjusting function to the bearing mechanism, the conventional disk device as described at the beginning is not disclosed. For the adjustment for providing a position adjusting function, that is, a problem that a plurality of (three in the illustrated example) stop screws 11 used for positioning the protective cover 2 on the chassis 1 are required. The problem of requiring a spring cannot be improved. Further, it is necessary to perform an extra process such as requiring the protective cover 2 to be provided with a hinge portion b.

  Further, in the configuration for imparting the position adjustment function proposed by the above-mentioned Patent Document 2, a configuration is adopted in which the guide shaft is pressed against the bearing surface using a leaf spring separate from the chassis and the protective cover. Therefore, there is a problem that the leaf springs are necessary and the number of parts and the number of assembly steps are increased.

  The present invention has been made in view of the above situation, and is used for positioning the protective cover on the chassis after taking a measure that the position of the protective cover changes following the position adjustment of the guide shaft. No need for a screw, an adjustment spring consisting of a coil spring for providing a position adjustment function for the guide shaft, and a leaf spring that is separate from the chassis and protective cover. It is an object of the present invention to provide a disk device that eliminates the need to employ a structure that presses against the disk.

  The disk device according to the present invention includes a chassis, a protective cover placed on the chassis, a pair of guide shafts arranged horizontally in the space between the chassis and the protective cover, and a pair of the guide shafts. A bearing mechanism that supports four locations of one end and the other end of each, an optical pickup that is guided by the guide shaft and can reciprocate within an opening formed in the protective cover, and is attached to the chassis. And a turntable for rotating the disk at a position facing the optical pickup outside the inter-space.

  Then, the protective cover is disposed in a horizontal direction with respect to the chassis through a fitting structure of a positioning hole formed in the protective cover and a positioning protrusion formed in the chassis and fitted in the positioning hole so as to be vertically displaceable. It is positioned. By adopting this configuration, a set screw for positioning the protective cover on the chassis becomes unnecessary.

  Further, the bearing mechanism includes a first reference bearing mechanism that supports one end portion of the one side guide shaft, and a first adjustment shaft that supports the other end portion of the one side guide shaft and has a function of adjusting the position of the guide shaft. A bearing mechanism for adjustment, a second adjustment bearing mechanism that supports one end of the guide shaft on the other side and has a function of adjusting the position of the guide shaft, and supports the other end of the guide shaft on the other side And a third adjustment bearing mechanism having a function of adjusting the position of the guide shaft, wherein the reference bearing mechanism is formed by a horizontal and vertical surface provided in the chassis. And a spring portion that is provided on the protective cover and presses the guide shaft against the reference bearing surface, and the first to third adjustment bearing mechanisms are provided on the chassis. Corner shape formed by horizontal and vertical planes Adjusting bearing surface, a lateral pressing spring portion pressing the corresponding guide shaft against the vertical surface of the adjusting bearing surface, and a downward pressing spring pressing the corresponding guide shaft against the horizontal surface side of the adjusting bearing surface And an adjustment screw that displaces the guide shaft along the vertical surface of the adjustment bearing surface against the urging of the lower pressing spring portion or by the urging of the lower pressing spring portion. . By adopting this configuration, there is no need for an adjustment spring, which is a coil spring for providing a position adjustment function for the guide shaft, and the guide shaft is mounted using a leaf spring that is separate from the chassis and protective cover. It is not necessary to employ a structure that presses against the bearing surface.

  Further, the lateral pressing spring portion and the lower pressing spring portion are provided on the protective cover, and the protective cover is provided with a connecting piece for connecting the protective cover to each of the pair of guide shafts. It has been. By adopting this configuration, the position of the protective cover changes following the position adjustment of the guide shaft. For this reason, even if the guide shaft position is adjusted, the guide shaft adjustment gap is kept constant, which reduces the height of the space between the chassis and the protective cover and reduces the surface runout tolerance gap. Helps to secure widely.

  In the present invention, the spring portion of the reference bearing mechanism and the laterally-pressing spring portions of the first to third adjustment bearing mechanisms are integrally cut and formed in the protective cover made of sheet metal, and the first The first to third adjusting bearing mechanism's lower pressing spring portion is bent in the lateral pressing spring portion, and the connecting pieces of the first to third adjusting bearing mechanisms are connected to the lateral pressing spring portion. The connecting piece is bent and connected to the guide shaft by fitting a laterally recessed portion formed at the tip of the connecting piece to the guide shaft. It is desirable that the resilient force of the spring portion is configured to be applied to the guide shaft. With this configuration, it is not necessary to form the lateral pressing spring portion and the lower pressing spring portion of the first to third adjustment bearing mechanisms at different locations on the protective cover. The remaining numerical aperture can be suppressed to a low level, which helps to increase the installation significance of the protective cover provided to prevent the internal structure from being touched manually. Further, since the laterally recessed portion of the connecting piece is connected to the guide shaft by being fitted to the guide shaft, the assembling work for connecting the protective cover to the guide shaft by the connecting piece can be easily and reliably performed. Will be able to do.

  In the present invention, the horizontal surface forming the adjustment bearing surface of the first to third adjustment bearing mechanisms is formed by the upper surface of the horizontal piece provided in the chassis, and the adjustment screw It is possible to adopt a configuration in which is screwed into a screw hole penetrating the horizontal piece and is abutted against the outer peripheral surface of the corresponding guide shaft. With this configuration, the guide shaft is displaced along the vertical plane that forms the adjustment bearing surface by simply rotating the adjustment screw screwed into the screw hole, and the position of the guide shaft is adjusted.

  In the present invention, it is preferable that the lower guide spring portion is elastically contacted with the lower surface of the horizontal piece portion, thereby causing the corresponding guide shaft to be elastically pressed to the horizontal surface side of the adjustment bearing surface via the connection piece. . With this configuration, the protective cover is connected to the guide shaft without rattling.

  As described above, according to the disk device of the present invention, since the configuration for changing the position of the protective cover following the position adjustment of the guide shaft is adopted, the guide shaft adjustment is performed even if the position of the guide shaft is adjusted. The clearance is kept constant, which ensures a sufficient range for adjusting the position of the guide shaft, and keeps the space between the chassis and the protective cover low, ensuring a wide allowance for surface runout. Both of these requirements are satisfied, and it is easy to provide a thin disk device with excellent optical performance.

  Also, there is no need for a set screw used to position the protective cover on the chassis, and there is no need for an adjustment spring consisting of a coil spring to give the position adjustment function of the guide shaft. Since it is not necessary to adopt a structure in which the guide shaft is pressed against the bearing surface using a separate leaf spring, these parts can be omitted, and as a result, parts cost and assembly cost can be kept low. The effect of becoming.

1 is a schematic perspective view of a disk device as an embodiment of the present invention. It is an expanded sectional view of the part which follows the II-II line of FIG. It is a vertical front view of a reference bearing mechanism. FIG. 3 is a perspective view showing the reference bearing mechanism as viewed from the lower side of the chassis 1. It is a vertical front view of the 1st adjustment bearing mechanism. It is the perspective view which showed the bearing mechanism for 1st adjustments seeing from the lower side of the chassis. It is the perspective view which looked at the bearing mechanism for the 1st adjustment from other angles, and showed it from the lower side of the chassis. FIG. 2 is a partially longitudinal side view schematically showing an enlarged internal structure of the disk device of FIG. 1. It is a schematic perspective view of the disk apparatus as a conventional example. FIG. 10 is a partially longitudinal side view schematically showing an enlarged internal structure of the disk device of FIG. 9. It is a schematic plan view of the optical disc apparatus as a prior example. FIG. 2 is a partially longitudinal side view schematically showing an enlarged internal structure of an optical disc apparatus as a preceding example.

FIG. 1 is a schematic perspective view of a disk device as an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a portion taken along line II-II in FIG. In the figure, 1 is a chassis (traverse chassis), 2 is a protective cover placed on the chassis 1, and the protective cover 2 has a plurality of locations (three locations in the example) via the fitting structure shown in FIG. 2. Are positioned in the horizontal direction with respect to the chassis 1. 2 includes a combination of a positioning hole 22 formed in the protective cover 2 and a positioning protrusion 12 formed in the chassis 1 and fitted in the positioning hole 22 so as to be vertically displaceable. In this fitting structure, the positioning hole 22 is easily formed by punching a predetermined portion of the protective cover 2 , and the positioning projection 12 can be formed integrally with the chassis 1. The positioning protrusion 12 in the figure is formed in a post shape that is circular in plan view. In short, the positioning projection 12 may be configured to be vertically movable while being fitted in the positioning hole 22. If the above-described fitting structure is adopted as a configuration for positioning the protective cover 2 on the chassis 1 in the horizontal direction, it is not necessary to screw the protective cover 2 to the chassis 1, so that a set screw used for screwing is omitted. Will be able to. Therefore, the three retaining screws 11 used in the conventional example shown in FIG. 9 can be omitted.

  A vertically long opening 21 is formed in the protective cover 2, and the optical pickup 3 can reciprocate within the opening 21, and the reciprocating movement forms a pair of guide shafts 51, 55 forming a main shaft and a sub shaft. And a turntable 4 is provided on the outer side (upper side) of the protective cover 2.

  FIG. 8 is a partially longitudinal side view schematically showing an enlarged internal structure of the disk device of FIG. The pair of guide shafts 51 and 55 shown in FIG. 1 are arranged horizontally in the space S between the chassis 1 and the protective cover 2 (the horizontal direction is indicated by an arrow X in FIG. 1). In FIG. 8, only one guide shaft 51 of the pair of guide shafts 51 and 55 is shown. A motor 41 for rotationally driving the turntable 4 is mounted on a base plate 42 installed in the chassis 1 and accommodated in the inter-space S. Then, the disk D as a recording medium mounted on the turntable 4 is rotated at a position facing the optical pickup 3 by the motor 41, and the optical pickup 3 moves in the radial direction of the disk D within the opening 21 during the rotation. Then, the optical processing of the recording surface of the disk D is performed. In this type of disk device, a measure of position adjustment of the optical pickup 3 is taken in order to improve the optical performance. The position adjustment of the optical pickup is performed through the position adjustment of the pair of guide shafts 51 and 55.

  Four portions of one end and the other end of each of the pair of guide shafts 51 and 55 are supported by the bearing mechanism 6 shown in FIG. The four bearing mechanisms 6 support one reference bearing mechanism 60 that supports one end of the guide shaft 51 on one side and the other end of the guide shaft 51 on one side. A first adjustment bearing mechanism 70 having a position adjustment function, a second adjustment bearing mechanism 90A having a function of adjusting the position of the guide shaft 55 by supporting one end of the other guide shaft 55, and the other side And a third adjusting bearing mechanism 90B that supports the other end of the guide shaft 55 and has a function of adjusting the position of the guide shaft 55.

  Next, the reference bearing mechanism 60 will be described with reference to FIG. 3 or FIG. FIG. 3 is a longitudinal front view of the reference bearing mechanism 60, and FIG. 4 is a perspective view showing the reference bearing mechanism 60 as viewed from the lower side of the chassis 1.

As shown in FIG. 3 or FIG. 4, the chassis 1 is integrally provided with a substantially U-shaped support portion 61 having a horizontal piece portion 62 and a pair of vertical piece portions 63. One end of the side guide shaft 51 is inserted in a loosely fitted state. On the other hand, the protective cover 2 is formed with a leaf spring-like spring portion 64 inclined downward at an angle of approximately 45 degrees with respect to the vertical direction. Then, as shown in FIG. 3, the guide shaft 51 is elastically pressed by the intermediate portion of the spring portion 64 to press one end portion of the guide shaft 51 against the horizontal piece portion 62 and the vertical piece portion 63 on one side. . Here, the inner surfaces of the horizontal piece 62 and the vertical piece 63 on one side, to which one end of the guide shaft 51 is pressed, are a horizontal plane 66 and a vertical plane 67, respectively. Forms a reference bearing surface 65 having a corner shape. Therefore, the guide shaft 51 is elastically pressed against the horizontal surface 66 and the vertical surface 67 of the reference bearing surface 65 by the spring portion 64 as indicated by arrows a and b, and one end portion of the guide shaft 51 is supported by the support portion 61. It is possible to tilt in the vertical direction and the horizontal direction at the insertion point. Further, as shown in FIG. 4, the projecting piece 13 provided on the chassis 1 is opposed to one end surface of the guide shaft 51, and the projecting piece 13 prevents the position shift of the guide shaft 51 toward the front side in the axial direction. It has come to be. In FIG. 4, 100 is a motor, and 101 is a screw shaft, which form a drive system for reciprocating the optical pickup 3 shown in FIG.

  Next, the first adjustment bearing mechanism 70 will be described with reference to FIGS. FIG. 5 is a longitudinal front view of the first adjustment bearing mechanism 70, FIG. 6 is a perspective view of the first adjustment bearing mechanism 70 as viewed from the lower side of the chassis 1, and FIG. 7 shows the first adjustment bearing mechanism 70. FIG. 3 is a perspective view of the chassis 1 viewed from the lower side at another angle.

  As shown in FIGS. 5 to 7, the chassis 1 is provided with a substantially L-shaped protruding portion 71 and a vertical protruding piece portion 74 adjacent to the axial direction of the guide shaft 51. A support portion 73 is formed by the horizontal piece 75 of the substantially L-shaped protrusion 71 and the protrusion piece 74, and the other end of the guide shaft 51 on one side is provided on the support 73. Yes. On the other hand, the protective cover 2 has a leaf spring-like lateral pushing spring portion 76 extending in a substantially vertical direction, and a leaf spring-like leaf extending in a substantially lateral direction formed at the tip of the transverse pushing spring portion 76. And a lower pressing spring portion 77. Further, a connecting piece 78 is bent in the lateral pressing spring portion 76, and a laterally recessed portion 79 formed at the distal end portion of the connecting piece 78 is provided in the support portion 73. The other end of each is fitted with no rattling. The lateral push spring portion 76, the lower push spring portion 77, and the connecting piece 78 described here are formed by raising one portion of the protective cover 2.

  Then, as shown in FIG. 5, the lateral elastic force of the lateral pressing spring portion 76 is applied to the other end portion of the guide shaft 51 as shown by an arrow c through the connecting piece 78. Further, the elastic force of the lateral pressing spring portion 76 is indicated by the arrow d via the connecting piece 78 by elastically contacting the tip of the lower pressing spring portion 77 with the lower surface of the horizontal piece portion 75 of the substantially L-shaped protruding portion 71. Thus, the other end of the guide shaft 51 is provided. On the other hand, a screw hole 81 is formed through the horizontal piece portion 75, and an adjustment screw 82 is screwed into the screw hole 81 from below the horizontal piece portion 75. The tip is abutted against the lower part of the outer peripheral surface of the other end of the guide shaft 51.

  Here, the inner surface of the horizontal piece 75 of the substantially L-shaped protrusion 71 and the inner surface of the vertical protrusion 74 are a horizontal plane 84 and a vertical plane 85, respectively. A corner-shaped adjustment bearing surface 83 is formed. The other end portion of the guide shaft 51 is elastically pressed against the vertical surface 85 of the adjustment bearing surface 83 by the elastic force of the lateral pressing spring portion 76, and at the horizontal plane by the elastic force of the lower pressing spring portion 77. It is elastically pressed against the tip end surface of the adjusting screw 82 by being elastically pressed to the 84 side. Further, the other end of the guide shaft 51 can be displaced up and down along the vertical surface 85. Further, as shown in FIG. 7, the projecting piece 14 provided on the chassis 1 is opposed to the other end surface of the guide shaft 51, and the projecting piece 14 prevents the position shift of the guide shaft 51 toward the rear side in the axial direction. It has come to be.

  The second adjustment bearing mechanism 90A, which supports one end of the guide shaft 55 on the other side shown in FIG. 1 and has a function of adjusting the position of the guide shaft 55, and the other end of the guide shaft 55 on the other side are provided. The configuration of the third adjustment bearing mechanism 90B that supports and has the function of adjusting the position of the guide shaft 55 is the same as that of the first adjustment bearing mechanism 70 described with reference to FIGS. The second adjustment bearing mechanism 90A is disposed symmetrically with the first adjustment bearing mechanism 70 across the longitudinal axis L1 of the chassis 1, and the third adjustment bearing mechanism 90B sandwiches the horizontal axis L2 of the chassis 1. The second adjusting bearing mechanism 90A is arranged symmetrically. Therefore, in order to avoid duplication of description, description of the detailed structures of the second adjustment bearing mechanism 90A and the third adjustment bearing mechanism 90B is omitted.

  In the first adjustment bearing mechanism 70 described above, when the adjustment screw 82 is rotated in the forward direction or the reverse direction, the other end portion of the guide shaft 51 on one side resists the bias of the lower pressing spring portion 77, Alternatively, the biasing force of the lower pressing spring portion 77 causes displacement along the vertical surface 85 of the adjustment bearing surface 83. Therefore, the inclination angle of the guide shaft 51 on one side is increased or decreased with the support point by the reference bearing mechanism 60 as a fulcrum. Further, when the adjustment screw provided in the second adjustment bearing mechanism 90A or the third adjustment bearing mechanism 90B is rotated in the forward direction or the reverse direction, one end portion or the other end portion of the other guide shaft 55 is displaced. The tilt angle is adjusted.

  In the disk device according to the embodiment described above, the position adjustment (tilt angle adjustment) performed on the guide shaft 51 on one side is performed by the adjustment screw 82 of the first adjustment bearing mechanism 70 and the elastic force of the lower pressing spring portion 77. This is done by pressing against the other end of the guide shaft 51 that is biased downward. The position adjustment (tilt angle adjustment) performed on the other guide shaft 55 is performed by elastically adjusting the adjustment screw 82 of the second and third adjustment bearing mechanisms 90A and 90B and one end or the other end of the guide shaft 51. It will be done through intimidation. Therefore, an adjustment spring composed of a coil spring for providing a position adjustment function for the pair of guide shafts 51 and 55 is not required, and the guide shaft is separated from the chassis 1 and the protective cover 2 using a leaf spring separate from the chassis 1 and the protective cover 2. Since it is not necessary to employ a configuration in which the bearings 51 and 55 are pressed against the bearing surface, these components can be omitted, and as a result, the component cost and assembly cost can be reduced.

  Further, in this embodiment, the combination of the positioning projection 12 and the positioning hole 22 described with reference to FIGS. 1 and 2 allows the protective cover 2 to be vertically moved with respect to the chassis 1 without being displaced in the horizontal direction. It can be displaced in the direction (thickness direction of the disk device). Moreover, the protective cover 2 is connected to the pair of guide shafts 51 and 55 via the connecting pieces 78 of the first to third adjusting bearing mechanisms 70, 90A, and 90B, and the guide shafts 51 and 55 are connected to each other. Is displaced together with the guide shafts 51 and 55 following the position adjustment (tilt angle adjustment or the like) performed on the guide shaft 51. Therefore, even if the position of the guide shafts 51 and 55 is adjusted, the guide shaft adjustment gap C2 shown in FIG. 8 is kept constant. When the guide shaft adjustment gap C2 is kept constant in this way, the gap between the optical pickup 3 and the chassis 1 is narrowed and the vertical space S between the chassis 1 and the protective cover 2 is increased. Even if the width H1 is kept low, the guide shaft adjustment gap C2 can be made sufficiently wide to adjust the positions of the guide shafts 51 and 55 without any inconvenience. Therefore, by keeping the vertical width H1 of the space S between the chassis 1 and the protective cover 2 low, the guide shaft adjusting gap C2 is sufficiently wide, and at the same time, the surface runout allowable gap C1 is wide. It becomes possible easily.

  For this reason, the conventional disk device described with reference to FIGS. 9 and 10 is a contradictory matter, and the surface runout allowable gap C1 is sufficiently widened to have a margin, and a guide is provided. That the shaft adjusting gap C2 is sufficiently wide is satisfied at the same time according to the embodiment.

  Moreover, according to this embodiment, it is not necessary to provide the protective cover 2 with the hinge portion b as in the previous example described with reference to FIGS. Depending on the displacement width allowed for the protective cover 2, the position adjustment range of the guide shafts 51 and 55 is not limited.

  Furthermore, in this embodiment, in the first to third adjustment bearing mechanisms 70, 90A, 90B, the lower pressing spring portion 77 is bent at the distal end portion of the lateral pressing spring portion 76. It is not necessary to form the part 76 and the lower pressing spring part 77 at different locations of the protective cover 2. As a result, the numerical aperture remaining on the cut and raised trace of the protective cover 2 can be reduced, which is the significance of installing the protective cover provided to prevent the internal structure from being touched manually. There is an advantage that can be increased. In addition, since the laterally recessed portion 79 of the connecting piece 78 is fitted to the guide shafts 51, 55, the protective cover 2 is connected to the guide shafts 51, 55. , 55 can be assembled easily and reliably. In addition, the corresponding guide shafts 51 and 55 are elastically pressed to the horizontal surface 84 side of the adjustment bearing surface 83 through the connecting piece 78 by elastically contacting the lower pressing spring portion 77 to the lower surface of the horizontal piece portion 75. In addition, there is an advantage that the protective cover 2 is connected to the guide shafts 51 and 55 without rattling.

  For convenience of explanation, the same or corresponding elements are denoted by the same reference numerals throughout FIGS.

DESCRIPTION OF SYMBOLS 1 Chassis 2 Protective cover 3 Optical pick-up 4 Turntable 6 Bearing mechanism 12 Positioning protrusion 21 Opening of protective cover 22 Positioning hole 51 Guide shaft on one side 55 Guide shaft on the other side 60 Reference bearing mechanism 64 Spring portion 65 Reference bearing surface 66 Horizontal plane 67 Vertical surface 70 First adjustment bearing mechanism 75 Horizontal piece portion 76 Lateral push spring portion 77 Lower push spring portion 78 Connection piece 79 Lateral recessed portion 81 Screw hole 82 Adjustment screw 83 Adjustment bearing surface 84 Horizontal surface 85 Vertical surface 90A Second Bearing mechanism for adjustment 90B Third bearing mechanism for adjustment S Space between chassis and protective cover X Lateral direction

Claims (4)

A chassis, a protective cover placed on the chassis, a pair of guide shafts arranged horizontally in the space between the chassis and the protective cover, and one end and the other end of each of the pair of guide shafts A bearing mechanism that supports the four portions of the unit, an optical pickup that is guided by the guide shaft and that can reciprocate within an opening formed in the protective cover, and that is attached to the chassis and that is outside the inter-space. In a disk device comprising a turntable that rotates the disk at a position facing the optical pickup,
The protective cover is positioned in the horizontal direction with respect to the chassis through a fitting structure of a positioning hole formed in the protective cover and a positioning protrusion formed in the chassis and fitted in the positioning hole so as to be vertically displaceable. ,
The above-mentioned bearing mechanism has one reference bearing mechanism that supports one end portion of one guide shaft, and a first adjustment mechanism that supports the other end portion of the one guide shaft and has a function of adjusting the position of the guide shaft. A bearing mechanism, a second adjustment bearing mechanism that supports one end of the guide shaft on the other side and has a function of adjusting the position of the guide shaft, and a guide shaft that supports the other end of the guide shaft on the other side And a third adjusting bearing mechanism having a position adjusting function.
The reference bearing mechanism includes a corner-shaped reference bearing surface formed by a horizontal surface and a vertical surface provided in the chassis, and a spring provided in the protective cover and pressing the guide shaft against the reference bearing surface. And
Each of the first to third adjustment bearing mechanisms includes a corner-shaped adjustment bearing surface formed by a horizontal surface and a vertical surface provided in the chassis, and the corresponding guide shaft serves as an adjustment bearing surface. A lateral pressing spring portion that is pressed against the vertical surface, a lower pressing spring portion that presses the corresponding guide shaft against the horizontal surface of the adjustment bearing surface, and against the bias of the lower pressing spring portion, or And an adjustment screw for displacing the guide shaft along the vertical surface of the adjustment bearing surface by urging the lower pressing spring portion,
The lateral pressing spring part and the lower pressing spring part are provided on the protective cover, and the protective cover is provided with a connecting piece connecting the protective cover to each of the pair of guide shafts. A disk device characterized by that. The spring portion of the reference bearing mechanism and the laterally-pressing spring portions of the first to third adjustment bearing mechanisms are plate spring portions that are formed integrally with the protective cover made of sheet metal, and The first to third adjustment bearing mechanism's lower push spring portion is a leaf spring portion formed by bending the lateral push spring portion, and the first to third adjustment bearing mechanism connecting pieces include The side pressing spring is bent and formed
The connecting piece is connected to the guide shaft by fitting a laterally recessed portion formed at the tip of the connecting piece to the guide shaft, and the elastic force of the lateral pressing spring portion is interposed through the connecting piece. The disk device according to claim 1, wherein a force is applied to the guide shaft.   The horizontal plane forming the adjustment bearing surface of the first to third adjustment bearing mechanisms is formed by the upper surface of the horizontal piece portion provided in the chassis, and the adjustment screw is the horizontal piece. 3. The disk device according to claim 2, wherein the disk device is screwed into a screw hole penetrating the portion and abutted against an outer peripheral surface of a corresponding guide shaft.   4. The lower guide spring portion is elastically contacted with the lower surface of the horizontal piece portion, and the corresponding guide shaft is elastically pressed against the horizontal surface side of the adjustment bearing surface via the connecting piece. The disk device described in 1.

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