JP5216607B2 - Optical disk device - Google Patents

Description

  The present invention relates to an optical disc apparatus.

  For example, an optical disc apparatus for recording or reproducing information on an optical disc such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a BD (Blu-ray Disc (registered trademark)) is an electronic device such as a personal computer or a television. Widely used, such as built into equipment.

  The optical disc apparatus is configured by fixing a traverse mechanism or the like that guides an optical pickup in the radial direction of the disc while rotating the optical disc.

  In particular, by interposing a buffer member made of an elastic material such as rubber between the traverse mechanism and the casing, the traverse mechanism is transmitted to the traverse mechanism via the casing from the vibration of the traverse mechanism accompanying rotation of the optical disk, for example. 2. Description of the Related Art An optical disc apparatus that absorbs vibrations and suppresses signal disturbance related to recording and reproduction of information between an optical pickup and an optical disc and suppresses influence on surrounding electronic devices is known. (For example, refer to Patent Document 1).

JP 2006-12329 A

  However, in the above-described optical disk device, for example, when an impact is applied from the outside of the device, for example, during transportation, the traverse mechanism is greatly displaced within the housing due to the presence of a buffer member. There is a possibility that the pickup or the like is destroyed by receiving an impact due to the displacement.

A main invention that solves the above-described problems includes a rotating mechanism that rotates an optical disk, an optical pickup that irradiates the optical disk with laser light and receives reflected light of the laser light, and the optical pickup in a radial direction of the optical disk. a traverse mechanism having a guide mechanism for guiding said the traverse mechanism housing is attached to the upper portion of the bottom member, disposed between the traverse mechanism and the bottom surface, the cushioning member to relieve vibration occurring in the traverse mechanism And a projecting piece that is disposed between the bottom surface and the buffer member and restricts the displacement of the traverse mechanism when the vibration is transmitted to the buffer member, and between the bottom surface and the traverse mechanism comprising a spacer distance between holds the traverse mechanism to be constant, the said spacer, and said projecting piece A first projecting piece that restricts displacement of the traverse mechanism in a first direction parallel to the bottom surface, and a second projecting piece that restricts displacement of the traverse mechanism in a second direction perpendicular to the bottom surface. The traverse mechanism passes through the first shaft hole, the second shaft hole, and the third shaft hole provided in the traverse mechanism, the buffer member, and the spacer, respectively, and the traverse mechanism is moved to the buffer member. And a shaft member for attaching to the upper part of the bottom surface via the spacer, the traverse mechanism has the first shaft hole in each of a plurality of ends, and the spacer has the traverse mechanism When the shaft member passes through the first to third shaft holes to be attached to the upper portion of the bottom surface, the first projecting piece faces an end surface that regulates displacement in the first direction of the traverse mechanism and Second Piece has a protrusion for adjusting the end face opposite to the direction for regulating the second direction of displacement of the traverse mechanism, wherein the housing, the optical disk apparatus having a locking hole of the protrusion is locked is there.
Other features of the present invention will become apparent from the accompanying drawings and the description of this specification.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to absorb the vibration of a traverse mechanism with a buffer member, especially when an external impact acts, the optical disk apparatus which can suppress the displacement of a traverse mechanism resulting from a buffer member can be provided.

(A) is a top view of the optical disk apparatus based on this embodiment, (b) is a fragmentary sectional view in A-A 'of the optical disk apparatus shown to (a). It is a disassembled perspective view of the optical disc device concerning this embodiment. It is a top view of the optical disk apparatus except a conveyance mechanism. FIG. 4 is a partial cross-sectional view taken along the line B-B ′ of the optical disc device shown in FIG. 3. FIG. 4 is a partial cross-sectional view at C-C ′ of a portion surrounded by a circular dotted line of the optical disc apparatus shown in FIG. 3. It is a figure which shows the structural example of a spacer. It is a figure which shows the structural example of another spacer. It is a perspective view of the optical disc device concerning this embodiment when a rigid substrate and a metal plate are attached.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

=== Optical disk device ===
A configuration example of the optical disc apparatus 1 according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1A is a plan view of the optical disc apparatus 1 according to the present embodiment. FIG. 1B is a partial cross-sectional view taken along the line AA ′ shown in FIG. 1 of the optical disc apparatus 1 shown in FIG. FIG. 2 is an exploded perspective view of the optical disc apparatus 1 according to the present embodiment. 1 and 2, the x axis indicates the “depth direction” of the optical disk apparatus 1, the y axis indicates the “width direction” of the optical disk apparatus 1, and the z axis indicates the “thickness” of the optical disk apparatus 1. Direction ". In the x-axis, y-axis, and z-axis, the side facing the arrow is referred to as a “+ side”, and the side opposite to the arrow is referred to as a “− side”. The same applies to the x-axis, y-axis, and z-axis in all subsequent figures in this specification.

  The optical disc apparatus 1 is for recording information on an optical disc 100 such as a DVD and reproducing the recorded information. For example, a rigid substrate (not shown) for controlling signal processing for the optical disc 100, and A metal plate 21 (FIG. 8 described later) for shielding electromagnetic waves is attached to a main body of a television or an audio device.

  Specifically, the optical disc apparatus 1 includes a traverse mechanism 3, a housing 2, a buffer member 6, and spacers 7a and 7b. The optical disc apparatus 1 further includes a transport mechanism 4, and the transport mechanism 4 causes the optical disc to reach a signal processing position inside the optical disc apparatus 1 (position indicated by a circular dotted line in FIG. 1A) from the optical disc insertion port 41. 100 is transported. The transport mechanism 4 includes a metal plate 43 that covers the surface of the transport mechanism 4 exposed to the outside of the housing 2 and shields electromagnetic waves when attached to the housing 2 as described later.

<<< Traverse mechanism >>>
The traverse mechanism 3 includes a rotation mechanism 39, an optical pickup 33, and a guide mechanism 31 as a configuration for recording or reproducing information on the signal recording surface of the optical disc 100, and further includes a rigid substrate and the optical pickup 33. For example, a flexible substrate 37 is provided. The traverse mechanism 3 includes first shaft holes 50 a, 50 b, 50 c, 50 d and screws 5 (shaft members) as a configuration for mounting on the bottom surface of the housing 2.

  The rotation mechanism 39 rotates the optical disc 100 at the signal processing position. Specifically, the rotation mechanism 39 includes a turntable 35 and a spindle motor 36. When the optical disk 100 is transported to the signal processing position by the transport mechanism 4, the turntable 35 sandwiches (chucks) the center of the optical disk 100 with a clamper (not shown) of the transport mechanism 4. It is like that. The spindle motor 36 has a rotor shaft 36a fixed to the turntable 35, and rotationally drives the turntable 35 through the rotor shaft 36a.

  The optical pickup 33 condenses information recording or reproducing laser light emitted from a laser light source (not shown) on the signal recording surface of the optical disc 100 at the signal processing position by the objective lens 34, and this laser light. Receives the reflected light reflected by the optical disc 100 through the objective lens 34. As will be described later, the optical pickup 33 is guided in the radial direction of the optical disc 100 by the guide mechanism 31. In the present embodiment, this radial direction is changed from the x-axis in FIG. This is defined as a radial direction R inclined by a predetermined angle. In the radial direction R, the outer peripheral side of the optical disc 100 is defined as a negative side, and the inner peripheral side of the optical disc 100 is defined as a positive side. The radial direction R may be parallel to the x-axis direction (that is, the optical pickup 33 may be guided in the depth direction of the optical disc apparatus 1 by a guide mechanism 31 described later). The optical pickup 33 has a connection portion 33 a to which one side of the flexible substrate 37 is attached at the − side end in the radial direction R.

  The guide mechanism 31 has a configuration described below in order to guide the optical pickup 33 along the radial direction R.

  The guide mechanism 31 according to the present embodiment has a configuration for supporting the rotation mechanism 39 described above in addition to the configuration for guiding the optical pickup 33. That is, the guide mechanism 31 is fixed to the inner side (on the bottom surface) of the bottom plate of the housing 2 as will be described later, and the center of the turntable 35 is an optical disc at the signal processing position shown in FIG. The rotation mechanism 39 is supported so as to pass through a straight line aa ′ defining 100 rotation axes. In addition, the bottom plate of the housing 2 means a plate on the negative side in the z-axis direction of the housing 2.

  The guide mechanism 31 supports the optical pickup 33 so as to be movable in the radial direction R. Specifically, the guide mechanism 31 has an opening 30 having a shape corresponding to the movement path of the optical pickup 33 at substantially the center thereof, and has guide shafts 32a and 32b. The guide shafts 32 a and 32 b are, for example, a pair of metal rods, are opposed to each other with the optical pickup 33 interposed therebetween, and are disposed on the opening 30 in parallel with the radial direction R. The optical pickup 33 is attached to the guide shafts 32a and 32b so as to be slidable along the radial direction R.

  As a power source for moving the optical pickup 33, for example, a guide mechanism 31 includes a step motor (not shown) and a lead screw fixed to the rotor shaft of the step motor and arranged in parallel with the guide shafts 32a and 32b. (Not shown) and a rack 38 fixed to the optical pickup 33. By the meshing of the rack 38 and the thread groove of the lead screw, the rotational movement of the step motor is converted into a translational movement along the radial direction R of the optical pickup 33. Note that a rack and pinion may be used instead of the lead screw and the rack 38 as a configuration for moving the optical pickup 33 in translation as described above.

  With the above configuration, the guide mechanism 31 causes the optical pickup 33 to move in the radial direction R between the innermost side and the outermost side of the signal recording surface while the objective lens 34 faces the signal recording surface of the optical disc 100. It drives to reciprocate along. Information is recorded or reproduced on the entire signal recording surface of the optical disc 100 by driving the optical pickup 33 by the guide mechanism 31 and rotating the optical disc 100 by the rotating mechanism 39.

  The first shaft holes 50a to 50d are, for example, four holes having notches formed at four corners of the traverse mechanism 3, and have a diameter substantially equal to an inner diameter of a groove 61 of the buffer member 6 described later, for example. Of the four corners of the traverse mechanism 3, a first shaft hole 50a is formed in the depth direction + side and the width direction-side, and a first shaft hole 50b is formed in the depth direction + side and the width direction + side. The first shaft hole 50c is formed on the side and the width direction minus side, and the first shaft hole 50d is formed on the depth direction minus side and the width direction plus side.

  The screw 5 includes a first shaft hole 50a to 50d of the traverse mechanism 3, a second shaft hole 60 of the buffer member 6 described later, a third shaft hole 70 of spacers 7a and 7b described later, and a throttle portion 24a to later described. This is a member for mounting the traverse mechanism 3 on the bottom surface of the housing 2 through the fourth shaft hole 20 of 24d. Specifically, as illustrated in FIG. 2, the screw 5 includes a head 5 a having a larger diameter than the second shaft hole 60 and the third shaft hole 70, and a second shaft hole larger than the fourth shaft hole 20. 60 and a shaft portion 5c having a slightly smaller diameter than the third shaft hole 70, a male screw portion 5b having a slightly smaller diameter than the fourth shaft hole 20, and a female screw that can be screwed into the male screw portion 5b. 5d (FIG. 5 described later).

<<< Housing, cushioning member, spacer >>>
The housing 2 is a box having a substantially rectangular shape formed of, for example, a metal plate that shields electromagnetic waves, and has a bottom surface to which the traverse mechanism 3 is fixed and an opening substantially parallel to the bottom surface. In the optical disk device 1 according to the present embodiment, when the optical disk device 1 is built in the above-described television or audio device, the housing 2 does not necessarily have to be arranged so that the bottom surface of the housing 2 is on the lower side in the vertical direction. The housing 2 may be arranged such that the end surface on the + side or the − side in the width direction faces downward.

  A transport mechanism 4 is attached to the opening of the housing 2. Specifically, inwardly protruding pieces 22 a and 22 b are provided at predetermined positions illustrated in FIG. 1A at the edge of the opening of the housing 2, and the transport mechanism 4 includes the protruding pieces. It is attached by screwing or the like with 22a, 22b. Further, inwardly protruding pieces 23a and 23b are provided at predetermined positions illustrated in FIG. 1A on the edge of the opening of the housing 2 where the transport mechanism 4 is not attached. The rigid substrate and the metal plate 21 are attached by screwing the projecting pieces 23a and 23b or the like.

  On the bottom surface of the housing 2, drawn portions 24 a, 24 b, 24 c, and 24 d are formed by, for example, drawing processing so as to protrude toward the inside of the housing 2. Note that “a” to “d” of the throttle portions 24a, 24b, 24c, and 24d correspond to “a” to “d” of the first shaft holes 50a to 50d at the four corners of the traverse mechanism 3, respectively. Yes. The spacer 7a and the buffer member 6 are disposed on each of the throttle portions 24a and 24b, and the spacer 7b and the buffer member 6 are disposed on each of the throttle portions 24c and 24d.

  The buffer member 6 and the spacers 7a and 7b will be described in more detail with reference to FIGS. FIG. 3 is a plan view of the optical disc apparatus 1 excluding the transport mechanism 4. FIG. 4 is a partial cross-sectional view taken along the line B-B ′ shown in FIG. 3 of the optical disc apparatus 1 shown in FIG. 3. FIG. 5 is a partial cross-sectional view at C-C ′ of a portion surrounded by a circular dotted line shown in FIG. 3 of the optical disc apparatus 1 shown in FIG. 3. FIG. 6 is a diagram illustrating a configuration example of the spacer 7a, and FIG. 7 is a diagram illustrating a configuration example of the spacer 7b.

A fourth shaft hole 20 is formed on the upper surface of each of the throttle portions 24a to 24d.
The buffer member 6 is a substantially cylindrical member formed of an elastic body such as silicon rubber, for example, and absorbs and softens vibration generated in the vicinity of the member 6 by elastic deformation of the member 6 itself. Specifically, as illustrated in FIGS. 2 and 5, the buffer member 6 includes a second shaft hole 60 penetrating in the thickness direction, and a groove 61 formed in an annular shape on a substantially cylindrical side surface. Have. The material forming the buffer member 6 is not limited to silicon rubber, and may be natural rubber, a coil spring, or the like, for example.

  The spacers 7a and 7b are made of, for example, resin or the like, and hold the traverse mechanism 3 at a certain distance from the bottom surface of the housing 2 and the first direction in which the traverse mechanism 3 is parallel to the bottom surface of the housing 2 Displacement in the (depth direction and width direction) and the second direction (thickness direction) perpendicular to the bottom surface is restricted. Specifically, as illustrated in FIGS. 6 and 7, the spacers 7 a and 7 b respectively pass through the optical disk apparatus 1 in a thickness direction and a substantially cylindrical main body that is flat in the thickness direction. A third shaft hole 70, a first projecting piece 71a, 71b projecting upward and parallel to the third shaft hole 70 from the main body, and restricting displacement of the traverse mechanism 3 in the first direction; It has 2nd protrusion piece 72a, 72b which protrudes perpendicularly | vertically with the triaxial hole 70 and controls that the traverse mechanism 3 displaces to a 2nd direction. Further, for example, the first projecting piece 71a and the second projecting piece 72a extend from the side surface of the main body of the spacer 7a so that the distance between them is a predetermined distance illustrated in FIG. Similarly, the 1st protrusion piece 71b and the 2nd protrusion piece 72b are extended from the side surface of the main body of the spacer 7b so that a space | interval may become the predetermined space illustrated by FIG.

  Hereinafter, based on the illustration of FIG.4 and FIG.5, the relationship between the 1st axial hole 50c of the traverse mechanism 3, the screw | thread 5, the buffer member 6, the spacer 7b, and the aperture | diaphragm | squeeze part 24c of the housing | casing 2 is demonstrated.

  The spacer 7b is disposed so that the third shaft hole 70 overlaps the fourth shaft hole 20 with respect to the throttle portion 24c, and the buffer member 6 so that the second shaft hole 60 overlaps the third shaft hole 70 with respect to the spacer 7b. The traverse mechanism 3 is arranged so that the first shaft hole 50c is fitted into the groove 61 of the buffer member 6. Thus, the first shaft hole 50 c, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20 are coaxial with the screw 5. The fitting operation of the first shaft hole 50c of the traverse mechanism 3 to the groove 61 of the buffer member 6 is performed through the above-described notch of the first shaft hole 50c.

  First, the first shaft hole 50 c, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20 are coaxial via the screw 5, but the male screw portion 5 b of the screw 5 At the stage where the female screw 5d is not screwed, the spacer 7b can be adjusted to rotate on the throttle portion 24c with the shaft portion 5c of the screw 5 as a rotation axis. The traverse mechanism 3 can be positioned so as to face the end surface of the traverse mechanism 3 on the side in the depth direction, and the second projecting piece 72b can face the end surface of the traverse mechanism 3 on the side in the thickness direction (downside). As a result, even when vibration or impact acts on the buffer member 6, the displacement of the traverse mechanism 3 toward the first projecting piece 71b is the distance until the end surface of the traverse mechanism 3 contacts the projecting piece 71b. Be regulated. Even if vibration or impact acts on the buffer member 6, the displacement of the traverse mechanism 3 toward the second projecting piece 72b is restricted to the distance until the end surface of the traverse mechanism 3 contacts the projecting piece 72b. Is done.

  Next, when the male screw portion 5b and the female screw 5d of the screw 5 are screwed together, the traverse is interposed between the head portion 5a of the screw 5 and the upper surface of the throttle portion 24c via the spacer 7b and the buffer member 6. The mechanism 3 is fixed. Since the distance between the head portion 5a of the screw 5 and the upper surface of the throttle portion 24c is maintained at the length of the shaft portion 5c of the screw 5, the buffer member 6 is compressed and deformed to such an extent that the effect of vibration absorption is reduced. Is prevented.

  In order to prevent the spacer 7b from rotating from the above-described posture and changing the orientation of the first protruding piece 71b and the second protruding piece 72b, for example, the protrusion 73 illustrated in FIGS. 5 and 7 is used. And is fixed by locking the projection 73 and a locking hole 20a formed on the upper surface of the throttle portion 24c, for example. Here, the other spacers 7a similarly have protrusions 73 (see FIG. 6), and the other throttle portions 24a, 24b, and 24d are similarly formed with locking holes 20a (see FIG. 2). .

  Similarly, with respect to the throttle portion 24d, the traverse mechanism 3 so that the first shaft hole 50d, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20 are coaxial. The buffer member 6 and the spacer 7 b are overlapped and fixed with screws 5. At this time, for example, the spacer 7b has a posture in which the first projecting piece 71b is opposed to the end surface of the traverse mechanism 3 in the depth direction and the second projecting piece 72b is opposed to the lower end surface of the traverse mechanism 3. The projection 73 and the locking hole 20a are fixed on the throttle portion 24d through the locking.

  Similarly, the traverse mechanism 3 so that the first shaft hole 50a, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20 are coaxial with respect to the throttle portion 24a, The buffer member 6 and the spacer 7 a are overlapped and fixed by the screw 5. At this time, the spacer 7a has, for example, a posture in which the first projecting piece 71a is opposed to the end surface on the substantially depth direction + side of the traverse mechanism 3 and the second projecting piece 72a is opposed to the lower end surface of the traverse mechanism 3. On the other hand, it is fixed on the throttle portion 24a through the locking of the protrusion 73 and the locking hole 20a.

  Similarly, with respect to the throttle portion 24b, the traverse mechanism 3 so that the first shaft hole 50b, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20 are coaxial. The buffer member 6 and the spacer 7 a are overlapped and fixed by the screw 5. At this time, the spacer 7a has, for example, a posture in which the first projecting piece 71a is opposed to the end surface on the + side of the traverse mechanism 3 and the second projecting piece 72a is opposed to the lower end surface of the traverse mechanism 3. On the other hand, it is fixed on the throttle portion 24b through the locking of the protrusion 73 and the locking hole 20a.

  Further, as illustrated in FIG. 1, in the present embodiment, since the transport mechanism 4 is disposed above the throttle portions 24 a and 24 b, the above-described configuration provided on the throttle portions 24 a and 24 b is used. For example, the diaphragm portions 24a and 24b are lower than the diaphragm portions 24c and 24d by a predetermined height so that there is no interference (see FIG. 4). For this reason, the tip of the second projecting piece 71a is as described above so that the distance between the second projecting piece 72a and the traverse mechanism 3 and the distance between the second projecting piece 72b and the traverse mechanism 3 coincide with each other. The shape is bent in the horizontal direction with the third shaft hole 70 by a predetermined height. Accordingly, the displacement of the traverse mechanism 3 in the second direction is uniformly regulated between the four corners of the traverse mechanism 3, and the horizontal posture of the traverse mechanism 3 is maintained.

  The configuration of the optical disc apparatus 1 to which the rigid substrate covered with the metal plate 21 is attached will be described with reference to FIG. 1 is a perspective view of the optical disc apparatus 1 according to this embodiment to which a rigid substrate and a metal plate 21 are attached.

The optical disk device 1 is used to suppress the propagation of electromagnetic waves that are generated inside the device 1 and may adversely affect the television or audio device in which the device 1 is built. In order to suppress the propagation of electromagnetic waves that are generated and have an adverse effect on the optical disk device 1, the optical plates are covered with a metal plate (housing 2, metal plate 43) that shields these electromagnetic waves.
Further, in the optical disc apparatus 1, a rigid substrate whose exposed surface is covered with a metal plate 21 is attached to the minus side in the depth direction of the transport mechanism 4, and a flexible substrate 37 from the optical pickup 33 is provided inside the housing 2. Connected with.
As a result, the optical disk device 1 to which the rigid substrate is attached can be incorporated in the above-described television, audio device, or the like in a state where the outer surface is surrounded by a metal plate that shields electromagnetic waves.

=== Suppression of displacement of traverse mechanism ===
The optical disk apparatus 1 according to the present embodiment includes at least a rotating mechanism 39 that rotates the optical disk 100, an optical pickup 33 that irradiates the optical disk 100 with laser light and receives reflected light of the laser light, and the optical pickup 33 as an optical disk. A traverse mechanism 3 having a guide mechanism 31 for guiding in a radial direction (for example, a radial direction R) of 100, a housing 2 to which the traverse mechanism 3 is attached on the bottom surface, and a traverse mechanism 3 and the bottom surface of the housing 2 The shock absorbing member 6 that is disposed between the shock absorbing member 6 and the shock absorbing member 6 that moderates the vibration generated in the traverse mechanism 3 and the bottom surface of the housing 2 and the shock absorbing member 6. The projecting pieces (for example, the first projecting pieces 71a and 71b and the second projecting pieces 72a and 72b) that restrict displacement are provided, and the bottom surface of the housing 2 and the traverse mechanism The distance between is a spacer 7a, 7b for holding the traverse mechanism 3 to be constant and.

  According to this optical disk apparatus 1, even if the impact received by the apparatus 1 during, for example, conveyance or drop test is so great as to induce deformation of the buffer member 6 to the extent that the displacement of the traverse mechanism 3 is induced, The actual displacement of the traverse mechanism 3 is restricted to a range until the traverse mechanism 3 contacts the protruding pieces of the spacers 7a and 7b. That is, the vibration of the traverse mechanism 3 can be absorbed by the buffer member 6, and the displacement of the traverse mechanism 3 caused by the buffer member 6 can be suppressed particularly when an external impact is applied. For example, if the traverse mechanism 3 is displaced, destruction of the optical pickup 33 and the like due to the displacement is prevented. This leads to an improvement in durability against vibration and impact of the optical disc apparatus 1.

  Further, according to the optical disk apparatus 1, since the spacers 7a and 7b are provided, the traverse mechanism 3 and the housing can be formed without forming a hole or a cut or the like communicating with the outside of the apparatus 1 on the bottom surface of the housing 2. A gap for preventing contact with each other can be formed between the bottom surface of the body 2 and the body 2. As a result, the optical disc apparatus 1 can prevent vibrations and shocks from being directly transmitted between the traverse mechanism 3 and the housing 2 while shielding electromagnetic waves.

  Further, in the optical disc apparatus 1 described above, the spacers 7a and 7b are first protruding pieces 71a and 71b that restrict the displacement of the traverse mechanism 3 in the first direction parallel to the bottom surface of the housing 2 as protruding pieces. Second projecting pieces 72 a and 72 b that restrict displacement of the traverse mechanism 3 in a second direction perpendicular to the bottom surface of the housing 2 are provided.

  According to this optical disc apparatus 1, the displacement of the traverse mechanism 3 in the first direction is restricted by the first projecting pieces 71a and 71b, and the displacement of the traverse mechanism 3 in the second direction is regulated by the second projecting pieces 72a and 72b. Since it is regulated, displacement in a plurality of directions of the traverse mechanism 3 can be regulated, and resistance to vibration and impact can be enhanced.

  In the optical disc apparatus 1 described above, the traverse mechanism 3 includes the first shaft holes 50a to 50d, the second shaft hole 60, and the third shaft hole provided in the traverse mechanism 3, the buffer member 6, and the spacers 7a and 7b, respectively. The shaft member (for example, screw 5) for penetrating 70 and attaching the traverse mechanism 3 on the bottom face of the housing | casing 2 via the buffer member 6 and spacer 7a, 7b is further provided.

  According to the optical disc apparatus 1, the first shaft holes 50a to 50d, the second shaft holes 60, which are formed in each of the traverse mechanism 3, the buffer member 6, and the spacers 7a and 7b, for example, are stacked so as to be coaxial. The traverse mechanism 3 can be attached to the bottom surface of the housing 2 via the buffer member 6 and the spacers 7a and 7b with a simple configuration using the third shaft hole 70 and the screw 5 passing therethrough.

  In the optical disc apparatus 1 described above, the traverse mechanism 3 has first shaft holes 50 a to 50 d at each of a plurality of end portions, and the spacers 7 a and 7 b attach the traverse mechanism 3 on the bottom surface of the housing 2. Accordingly, when the screw 5 passes through the first shaft holes 50a to 50d, the second shaft hole 60, and the third shaft hole 70, the first projecting pieces 71a and 71b regulate the displacement of the traverse mechanism 3 in the first direction. The second projecting pieces 72a and 72b face the end face (for example, the depth direction-side end face) and face the end face (for example, the thickness direction-side end face) that restricts displacement in the second direction of the traverse mechanism 3. Can be rotated.

  According to the optical disc apparatus 1, the orientation of the first projecting pieces 71a and 71b and the second projecting pieces 72a and 72b facing the end surfaces of the respective traverse mechanisms 3 can be adjusted by the rotation of the spacers 7a and 7b. Since the traverse mechanism 3 is restricted from being displaced toward the first projecting pieces 71a and 71b and the second projecting pieces 72a and 72b facing the end surfaces, respectively, for example, the first projecting unit projects from the end surface of the traverse mechanism 3. By arranging the pieces 71a and 71b and the second projecting pieces 72a and 72b so as to face each other from different directions, it is possible to increase the directions in which the displacement of the traverse mechanism 3 can be regulated. As a result, the displacement of the traverse mechanism 3 can be more reliably regulated and the resistance to impact can be increased.

  Further, in the optical disc apparatus 1 described above, the bottom surface of the housing 2 has the throttle portions 24a to 24d protruding to the inside of the housing 2, and the throttle portions 24a to 24d are the fourth shaft holes through which the screws 5 pass. The traverse mechanism 3 includes a screw 5 penetrating the first shaft holes 50a to 50d, the second shaft hole 60, the third shaft hole 70, and the fourth shaft hole 20, so that Is attached.

  According to the optical disc apparatus 1, as illustrated in FIG. 5, the female screw 5d is disposed on the back side of the throttle portions 24a to 24d outside the housing 2. Therefore, for example, by making the thickness of the male screw portion 5b and the female screw 5d screwed to each other thinner than the thickness of the throttle portions 24a to 24d, the male screw portion 5b and the female screw 5d screwed to each other can be Thus, the optical disk device 1 can be made thinner by the amount that does not protrude outwardly. In addition, it is not necessary to form a hole or notch communicating with the outside on the bottom surface of the housing 2 by the throttle portions 24a to 24d and the spacers 7a and 7b, and between the traverse mechanism 3 and the bottom surface of the housing 2, A gap can be formed to prevent contact with each other. As a result, the main bodies of the spacers 7a and 7b can be made thin, and vibrations and impacts can be prevented from being directly transmitted between the traverse mechanism 3 and the housing 2 while shielding electromagnetic waves.

=== Other Embodiments ===
The above-described embodiment is intended to facilitate understanding of the present invention, and is not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes equivalents thereof.

  In the optical disc apparatus 1 described above, the second projecting pieces 72a and 72b extend from the side surfaces of the main bodies of the spacers 7a and 7b, respectively, but the present invention is not limited to this. For example, the second protrusion extends from the side surface of each of the first protrusion pieces 71a and 71b extending in the thickness direction + side of the optical disc apparatus 1 from the upper surface of the traverse mechanism 3 so as to extend toward the traverse mechanism 3 side. The pieces 72a and 72b may be formed respectively. As a result, the second projecting pieces 72a and 72b are opposed to the upper end face of the traverse mechanism 3, and the upward displacement of the traverse mechanism 3 can be restricted.

  In the optical disc apparatus 1 described above, the first projecting piece 71b faces the end surface of the traverse mechanism 3 in the depth direction on the diaphragm portions 24a to 24d, and the first projecting piece 71a is an abbreviation of the traverse mechanism 3. They were arranged so as to face the end surfaces in the depth direction + side and the substantially width direction + side. However, the present invention is not limited to this, and by adjusting the rotation of the spacers 7 a and 7 b described above, the first projecting pieces 7 a and 7 b can take a posture facing the end surface that regulates the displacement of the traverse mechanism 3. That's fine.

  In the optical disc apparatus 1 described above, the first shaft holes 50a to 50d are formed at the four corners of the traverse mechanism 3, and are formed on the bottom surface of the housing 2 at positions corresponding to the first shaft holes 50a to 50d, respectively. The traverse mechanism 3 is mounted on the throttle portions 24a to 24d via the spacers 7a and 7b and the buffer member 6. However, the present invention is not limited to this, and the first shaft hole is formed at at least two end portions of the traverse mechanism 3, and the traverse mechanism is formed on the throttle portion corresponding to the first shaft hole as described above. 3 may be attached via the spacers 7 a and 7 b and the buffer member 6.

  In the optical disc apparatus 1 described above, each of the first projecting pieces 71a and 71b is one projecting piece. However, the first projecting piece 71a and 71b are not limited to this, and are opposed to the end of the traverse mechanism 3 from different directions. The 1st protrusion pieces 71a and 71b may be comprised from the some protrusion piece formed in this. As a result, the direction in which the displacement of the traverse mechanism 3 can be regulated can be increased, so that the displacement of the traverse mechanism 3 can be regulated more reliably and the resistance to impact can be further enhanced. This also applies to the second projecting pieces 72a and 72b.

DESCRIPTION OF SYMBOLS 1 Optical disk apparatus 2 Housing | casing 20 4th shaft hole 3 Traverse mechanism 31 Guide mechanism 33 Optical pick-up 39 Rotation mechanism 5 Screw 50a, 50b, 50c, 50d 1st shaft hole 6 Buffer member 60 2nd shaft hole 7a, 7b Spacer 70 1st Triaxial holes 71a, 71b First protruding pieces 72a, 72b Second protruding pieces 100 Optical disc

Claims (2)

A traverse mechanism comprising: a rotation mechanism that rotates an optical disk; an optical pickup that irradiates the optical disk with laser light and receives reflected light of the laser light; and a guide mechanism that guides the optical pickup in a radial direction of the optical disk. When,
A housing in which the traverse mechanism is attached to the upper portion of the bottom surface,
A cushioning member that is disposed between the traverse mechanism and the bottom surface, and cushions vibrations generated in the traverse mechanism;
A protruding piece that is disposed between the bottom surface and the buffer member and restricts the displacement of the traverse mechanism when the vibration is transmitted to the buffer member; between the bottom surface and the traverse mechanism; A spacer that holds the traverse mechanism so that the distance is constant;
Equipped with a,
The spacer includes, as the protruding piece, a first protruding piece that restricts displacement of the traverse mechanism in a first direction parallel to the bottom surface, and a displacement of the traverse mechanism in a second direction perpendicular to the bottom surface. A second projecting piece for regulating
The traverse mechanism passes through a first shaft hole, a second shaft hole, and a third shaft hole provided in the traverse mechanism, the buffer member, and the spacer, respectively, and the traverse mechanism passes through the buffer member and the spacer. A shaft member for attaching to the upper part of the bottom surface,
The traverse mechanism has the first shaft hole at each of a plurality of ends,
In order to attach the traverse mechanism to the upper part of the bottom surface, the spacer causes the first projecting piece to displace in the first direction of the traverse mechanism when the shaft member passes through the first to third shaft holes. A protrusion for adjusting the direction of the second projecting piece facing the regulating end surface and the direction of the second projecting piece facing the end surface regulating the displacement in the second direction of the traverse mechanism;
The housing has a locking hole in which the protrusion is locked.
An optical disc device characterized by the above. The bottom surface has a throttle portion protruding to the inside of the housing,
The throttle portion has a fourth shaft hole through which the shaft member passes,
The traverse mechanism, by which the shaft member penetrates the first through fourth shaft hole, attached to the upper portion of the narrowed portion, the optical disk apparatus according to claim 1, characterized in that.

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