JP3713714B2 - Disk unit - Google Patents

Description

  The present invention relates to a disk device, and more particularly to a disk device that takes measures to suppress the generation of vibration noise by eliminating an inevitable gap formed between a housing and a disk tray.

  A basic configuration and operation of a disk device will be described with reference to FIG. 1 showing a disk device according to an embodiment of the present invention.

  In this disk apparatus, a disk tray 5 is attached to a housing 1, and the disk tray 5 is moved back and forth between an initial position indicated by a virtual line in FIG. 1 and a carry-in position indicated by a solid line in FIG. The The disk D is attached to and detached from the disk tray 5 at the initial position, and the disk D is delivered to the scanning position by the optical pickup 2 at the carry-in position. The delivery of the disk D between the disk tray 5 at the carry-in position and the scanning position by the optical pickup 2 is performed through a vertical movement of a disk chucking mechanism (not shown) attached to the housing 1 so as to be movable up and down. . That is, the disc chucking mechanism includes a turntable 31 that is rotationally driven by the motor M and a chucking plate (not shown) that is the counterpart. Then, the disk D is transferred from the disk tray 5 to the scanning position. When the disk tray 5 on which the disk D is mounted advances to the loading position, the disk chucking mechanism is moved upward to wait at the disk transfer position. The turntable 31 rises to receive the disk D from the disk tray 5 and floats, and the disk D is pressed against the turntable 31 by pressing the disk D against a chucking plate rotatably disposed above the turntable 31. It is held by the king plate and held at the scanning position. Thus, when the disk D is held at the scanning position, the disk D is rotated by the output of the motor M, while the optical pickup 2 moves along the radial direction of the disk D, and the recording surface of the disk D is moved. Scanned. The disk 5 is transferred from the scanning position to the disk tray 5 by moving the disk chucking mechanism downward so that the disk D is moved by the disk tray 5 while the turntable 31 on which the disk D is mounted is lowered. It is done by letting you receive.

  In this disk apparatus, the disk tray 5 is moved forward and backward with respect to the housing 1, and therefore, in order to ensure smoothness of the forward and backward movement, particularly between the housing 1 and the disk tray, the sliding is performed. An inevitable gap is formed in the moving part. This inevitable gap causes the disc tray 1 to vibrate and generate vibration noise when a disc with a biased center of gravity (universal center of gravity disc) rotates when the turntable 31 is rotated by the motor M.

  Therefore, in order to suppress this vibration noise, by applying a load to the disk tray at the loading position and displacing the disk tray, the predetermined position of the disk tray is brought into contact with the predetermined position on the housing side, and the above inevitable gap is formed. A method of disappearing is known. Various measures for obtaining the load with a resin spring have been proposed or attempted.

  FIG. 6 shows a conventionally attempted countermeasure. In this device, the downwardly protruding rib 56 provided in the disc tray 5 is used as the load receiving portion 57, whereas the lower portion provided in the synthetic resin casing 1 is positioned below the disc tray 5. An action portion 61 is provided on the top of the upward resin piece as the resin spring 6 integrally formed with the plate portion 11, and the action portion 61 is brought into contact with the load receiving portion 57 in an elastic state, and the load receiving portion 57 is moved to an arrow. Like F, it is pressed only in the width direction of the disc tray 5. In the figure, the phantom line indicates the position of the resin spring 6 when there is no load, and the solid line indicates the position of the resin spring 6 when the action part 61 presses the load receiving part 57.

  On the other hand, as a conventional example, a horizontal resin spring piece is provided on the side surface of the disc tray, and the protrusion provided on the housing side of the resin spring piece of the disc tray located at the loading position is pressed in a compressed state. There is one that generates the load (see, for example, Patent Document 1).

  As another conventional example, there is one in which the load is generated by pressing the end of the disk tray at the loading position vertically downward by a protrusion provided on the surface cover of the disk device (see, for example, Patent Document 2).

JP 2003-123453 A Japanese Patent Laid-Open No. 2002-230880

  However, as the countermeasure described with reference to FIG. 6, the acting portion 61 of the resin spring 6 is brought into contact with the load receiving portion 57 in a resilient state so that the load receiving portion 57 is only in the width direction of the disc tray 5 as indicated by the arrow F. When pressed, the inevitable gap formed between the disc tray 5 and the housing 1 can only disappear in the left-right direction (corresponding to the width direction of the disc tray 5), such as in the vertical direction. Then, the inevitable gap cannot be lost. For this reason, it has been difficult to satisfactorily suppress the vibration noise generated due to the existence of inevitable gaps.

  By the way, when a load is applied to an object by a resin spring, the amount of deformation may increase with time even under a constant stress, and this phenomenon is called creep.

  6 as well, if creep occurs in the resin spring 6 over time when the acting portion 61 of the resin spring 6 is in contact with the load receiving portion 57 in the elastic state, the elastic pressure by the resin spring 6 is obtained. Occurs, that is, a phenomenon of load loss occurs. When such a load loss occurs, the action portion 61 of the resin spring 6 moves the load receiving portion 57 on the disk tray 5 side in the direction of arrow F. Therefore, there is a problem in that the inevitable gap described above is regenerated by vibration and a vibration sound is generated. This problem also occurs in the conventional example described in Patent Document 1. Also, in the conventional example described in Patent Document 2, since the projection of the cover is configured to press the end of the disk tray at the carry-in position vertically downward, the same phenomenon occurs when creep occurs at the projection formation portion of the cover. Problems arise.

  The present invention has been made in view of the above problems, and allows the inevitable gap formed between the disc tray and the housing to be eliminated not only in the left-right direction but also in the vertical direction. Accordingly, an object of the present invention is to provide a disk device capable of enhancing the effect of suppressing vibration noise generated due to the presence of an inevitable gap. It is another object of the present invention to provide a disk device capable of preventing a load drop by a shape feature of an action portion of the resin spring even when the resin spring is creeped.

  In the disk device according to the present invention, a disk tray that is moved back and forth between an initial position at which the disk is attached and detached and a carry-in position at which the disk is delivered to the scanning position by the optical pickup is attached to the housing. An inevitable gap formed between the housing and the disk tray at the carry-in position is displaced by applying a load by a resin spring provided on one of the members to the other member to displace the other member. In the disk device in which generation of vibration noise is suppressed by eliminating the vibration, the acting portion of the resin spring that contacts the load receiving portion provided on the other side member is inclined with respect to the bending direction of the resin spring. It is a surface.

  With this configuration, when the resin spring is not creeping, a force directed to the return direction of the resin spring and a force to push the load receiving portion upward are generated at the action portion. That is, when the acting portion of the resin spring comes into contact with the load receiving portion of the other side member and a load by the resin spring is applied to the load receiving portion, the load receiving portion receives a force and a load receiving force that are directed to the return direction of the resin spring. Forces in the direction of pushing the part upward are generated, and these forces are directed in directions orthogonal to each other. For this reason, the inevitable gap between the disc tray and the casing disappears in the biaxial directions orthogonal to each other, for example, the biaxial directions of the width direction and the vertical direction of the disc tray. Helps to effectively suppress

  In the present invention, it is desirable that the inclined surface forming the action portion of the resin spring has a gradient that allows the load receiving portion to slide down and move in the return direction of the resin spring. According to this, even if the resin spring provided in the one side member causes the creep, the load receiving portion of the other side member riding on the inclined surface which is the acting portion of the resin spring has the inclined surface. In order to slide down, a state where a constant load is applied to the load receiving portion in the return direction of the resin spring is maintained, whereby load loss is unlikely to occur and vibration noise is suppressed.

  In the present invention, the load receiving portion is a lower end edge of a rib provided in the disc tray and protruding downward, and the resin spring is provided in the housing and is located on the lower side of the disc tray. It is possible to employ a configuration in which the resin piece is formed upward and integrally formed with the portion, and the action portion is provided on the top of the resin piece. According to this, in addition to the countermeasure described with reference to FIG. 6, even if the resin spring is caused to creep by a simple configuration in which the acting portion of the resin spring is changed from the vertical surface illustrated in FIG. 6 to the inclined surface. The inevitable gap is prevented from being reproduced and the vibration noise is suppressed.

  In the present invention, the inevitable gap is provided on the upper surface of the lower plate portion, and is provided on the lower surface of the disc tray and is fitted into the guide projection so as to cooperate with the guide projection. It is desirable to adopt a configuration in which the groove wall surface of the guide groove is formed by the side surface of the rib, and is formed by a space facing the groove wall surface of the guide groove that guides the forward and backward movement of the tray. . According to this, since the rib helps to form the groove wall surface of the guide groove and the load receiving portion, it is necessary to separately provide the rib that forms the load receiving portion and the rib that forms the groove wall surface of the guide groove. As a result, the complexity of the disc tray configuration is avoided.

  In the present invention, in the resin spring, it is desirable that the continuous portion with respect to the lower plate portion of the resin piece is formed as a U-shaped bent portion extending the bending region of the resin spring. In this case, it is possible to secure a long bending region used for the elastic deformation of the resin piece for the height of the resin piece, and it is possible to form a resin spring that hardly causes creep.

  The present invention is further embodied by adopting the following configuration. That is, a disk tray that is moved back and forth between the initial position at which the disk is attached and detached and the carry-in position at which the disk is delivered to the scanning position by the optical pickup is attached to the case. The inevitable gap formed between the disk tray and the other side member by displacing the other side member by applying a load by the resin spring provided on one side member of them, and disappearing, In the disk device configured to suppress the generation of vibration noise, the inevitable gap is provided in the housing and provided on the upper surface of the lower plate portion positioned on the lower side of the disk tray, A groove wall of a guide groove that is provided on the lower surface of the disc tray and that fits the guide projection and guides the forward and backward movement of the disc tray by cooperating with the guide projection. The load receiving portion provided on the other side member is formed by a lower end edge of a downwardly protruding rib which is provided on the disc tray and forms the guide groove, and the rib. Is formed as an upward resin piece integrally formed with the lower plate portion made of synthetic resin, and the load receiving portion is slid down on the top of the resin piece. Provided with the action portion comprising an inclined surface that has a slope that can be moved in the return direction of the resin spring and that is inclined with respect to the bending direction of the resin spring and abuts against the load receiving portion, the resin piece with respect to the lower plate portion The disk when the continuous portion is formed as a U-shaped bent portion that extends the bending region of the resin spring, and the inevitable gap disappears due to contact between the guide protrusion and the groove wall surface Of tray Location is, they are determined as the reference position of the disc tray at the load position, so that the disk is passed to and from the disc tray and the scanning position of the reference position. According to this, not only when the resin spring does not cause creep, but also when the creep occurs, the disc tray is arranged at the reference position at the loading position. The certainty of disk delivery between the two is improved.

  As described above, according to the present invention, the disk tray that is moved back and forth between the initial position at which the disk is attached and detached and the carry-in position at which the disk is delivered to the scanning position by the optical pickup is attached to the housing. The inevitable gap formed between the housing and the disk tray at the carry-in position is added to the other side member by applying a load by the resin spring provided on one side member thereof to the other side member. In the disk device that suppresses the generation of vibration noise by displacing the noise, it is possible not only to further enhance the vibration noise suppression effect using the resin spring, but also the resin spring creeps. Even if the elastic spring force of the resin spring does not act on the load receiving part, the shape of the action part of the resin spring prevents the load from being lost, and the vibration noise Generation is to be suppressed, thereby improving silence performance of the disk device.

  1 is a schematic plan view of a disk device according to an embodiment of the present invention, FIG. 2 is a schematic enlarged cross-sectional view of a portion taken along line II-II in FIG. 1, and FIG. 3 is a view taken along a line III-III in FIG. It is a general | schematic expanded sectional view.

  In the disk apparatus of FIG. 1, the housing 1 is provided with side walls 12 on the left and right, respectively, and a lower plate portion 13 positioned on the lower side of the disk tray 5 as shown in FIG. The guide projections 14 formed of a plurality of rib-shaped projections are distributed and provided at a plurality of positions in the front-rear direction arranged in a straight line on the upper surface of the lower plate portion 13, whereas the lower surface of the disk tray 5 As shown in FIG. 1, a guide groove 53 extending in the front-rear direction and a guide rib 54 extending in the front-rear direction are provided on both sides in the width direction. Then, the guide groove 53 is fitted to the one side guide protrusion 14 of the housing 1 as shown in FIG. 2, and the guide rib 54 is made to follow the other side guide protrusion 14 of the housing 1 as shown in FIG. A disk tray 5 is attached to the housing 1 so as to be able to move forward and backward between the aforementioned initial position and carry-in position.

  As shown in FIG. 2 or FIG. 3, the groove width dimension of the guide groove 53 of the disk tray 5 is determined to be slightly longer than the width (thickness) dimension of the guide protrusion 14 on the housing 1 side. Due to the dimensional difference between the two, an inevitable gap is formed in the fitting portion between the guide groove 53 and the guide protrusion 14 so as to allow the disk tray 5 to move smoothly forward and backward. That is, the guide groove 53 is formed by left and right ribs 55 and 56 protruding downward from the disc tray 5, and forms groove wall surfaces 53 a and 53 b of the guide groove 53, specifically, the guide groove 53. When the space formed between the inner surface of each of the left and right ribs 55 and 56 and the guide projection 14 is defined as the inevitable gap, and the disc tray 5 is positioned at the loading position, FIG. The disk tray 5 that has received a load in the direction of arrow F by a resin spring 6 (described later) shown in FIG. 3 is forcibly pushed to the right in the figure, and the groove wall surface 53a of the guide groove 53 is guided as shown in FIG. The inevitable gap between the groove wall surface 53a and the guide protrusion 14 disappears in contact with the protrusion 14. The position of the disc tray 5 when the inevitable gap between the groove wall surface 53a on one side of the guide groove 53 and the guide protrusion 14 disappears due to the load of the resin spring 6 being applied to the disc tray 5 is as follows. The reference position of the disc tray 5 at the carry-in position is determined, and the disc D is transferred between the disc tray 5 at the reference position and the scanning position described at the beginning.

  Next, as shown in FIG. 3, the resin spring 6 is an upward resin piece integrally formed with the lower plate portion 13 of the housing 1, and an action portion 61 having a flat inclined surface is formed on the top of the resin piece. In contrast, the lower end edge of the outer rib 56 forming the guide groove 53 forms a load receiving portion 57 as a counterpart portion of the action portion 61. In this embodiment, the inclined surface forming the action portion 61 at the top of the resin piece abuts against the load receiving portion 57 in a compressed state when the disc tray 5 is located at the carry-in position, and the resin When the resin spring 6 is inclined with respect to the bending direction of the spring (horizontal direction in FIG. 3) and the resin spring 6 is creeped and the load is lost, the load receiving portion 57 is slid down to return the resin spring 6 to the return direction. It has a gradient that can be moved to. Further, a continuous portion with respect to the lower plate portion of the resin piece is formed as a U-shaped bent portion 62 that extends the bending region of the resin spring 6.

  Other matters are the same as those of the conventional disk device described at the beginning.

  According to this embodiment, when the resin spring 6 is not creeping, the force in the direction of the arrow F toward the return direction of the resin spring 6 and the force in the direction of pushing the action portion 57 upward are applied to the action portion 57 on the disk tray 5 side. (Arrow U) occurs. Therefore, the disc tray 5 is positioned at the reference position at the carry-in position. In particular, as shown in FIG. 1, the protrusion 15 that suppresses the floating of the disk tray 5 is formed on the side wall 12 of the housing 1, so that the disk is driven by a force (arrow U) that pushes the action portion 57 upward. The tray 5 is pushed up and comes into contact with the protruding piece 15, and the inevitable gap between the protruding piece 15 and the disk tray 5 disappears. Therefore, the reference position of the disk tray 5 is regulated in the biaxial direction of the horizontal direction and the vertical direction, and not only the delivery of the disk D to and from the scanning position is performed more accurately. The vibration noise resulting from the existence of such inevitable gaps is suppressed. In FIG. 2, the phantom line indicates the position of the resin spring 6 when no load is applied, and the solid line indicates the position of the resin spring 6 when the action portion 61 presses the load receiving portion 57.

  On the other hand, when the resin spring 6 creeps and a load drop occurs, the load receiving portion 57 on the disk tray 5 side that is on the inclined surface which is the action portion 61 of the resin spring 6 is Therefore, the load receiving portion 57 is maintained in a state where a constant load in the direction of the arrow F pointing in the return direction of the resin spring 6 is applied to the load receiving portion 57, thereby making it difficult for load loss to occur and generating vibration noise. It is suppressed.

  In this embodiment, since the resin piece forming the resin spring 6 is provided with the bent portion 62, the bending region used for elastic deformation of the resin piece becomes longer for the height of the resin piece, and the creep is increased. A resin spring 6 is formed which is less likely to cause

  In this embodiment, the action portion 61 is provided on the top of the resin spring 6 formed integrally with the lower plate portion 13 of the housing 1, and the load receiving portion 57, which is the counterpart, is provided on the disc tray 5 side. For this relationship, for example, a resin spring can be provided on the disk tray side, the action portion can be provided on the resin spring, and a load receiving portion can be provided on the housing side. An example of this is illustrated in FIG.

  That is, in the example of FIG. 4, a resin spring 6 protruding forward is integrally formed at the front end of the disk tray 5, and an action portion 61 having an inclined surface is formed on the resin spring 6. By providing the load receiving portion 57, the action portion 61 is in contact with the load receiving portion 57 in an elastic state. According to this, when the disc tray 5 is located at the carry-in position, loads in the left-right direction and the vertical direction are applied to the disc tray 5, so an inevitable gap existing between the disc tray 5 and the housing. Disappears, the disc tray 5 and the housing come into contact with each other in the left-right direction and the vertical direction, and the generation of vibration noise is suppressed.

  FIG. 5 shows another example. In this case, the resin spring 6 is provided on the housing 1 side, and the action portion 61 formed by the inclined surface of the resin spring 6 is connected to the load receiving portion 57 formed by the front end corner portion of the disc tray 5. It is designed to make elastic contact at the loading position. Also by this, when the disc tray 5 is located at the carry-in position, a lateral force F and a vertical force D are applied to the disc tray 5, so that the disc tray 5 is placed between the disc tray 5 and the housing 1. The existing unavoidable gap disappears, and the disc tray 5 and the housing 1 come into contact with each other in the left-right direction and the vertical direction, and the generation of vibration noise is suppressed.

1 is a schematic plan view of a disk device according to an embodiment of the present invention. It is a general | schematic expanded sectional view of the part which follows the II-II line of FIG. It is a general | schematic expanded sectional view of the part which follows the III-III line of FIG. (A) is explanatory drawing which showed the modification of the principal part with the schematic plan view, (B) is an expanded sectional view of the part which follows the IVB-IVB line | wire of (A). (A) is explanatory drawing which showed the other modification of the principal part with the schematic plan view, (B) is an expanded sectional view of the part in alignment with the VB-VB line | wire of (A). It is a schematic sectional drawing of the principal part of the conventional disc apparatus.

Explanation of symbols

D disc 1 housing 2 optical pickup 5 disc tray 6 resin spring 13 lower plate portion 14 guide projection 53 guide groove 53a, 53b groove wall surface of guide groove 56 rib 61 action portion 62 bent portion

Claims (6)

A disk tray that is moved back and forth between an initial position at which the disk is attached and detached and a loading position at which the disk is transferred relative to the scanning position by the optical pickup is attached to the casing. The inevitable gap formed between the tray and the other side member is displaced by applying the load of the resin spring provided on the one side member to the other side member and disappears. In the disk device designed to suppress the occurrence of
The inevitable gap is provided in the casing and provided on the upper surface of the lower plate portion located on the lower side of the disc tray, and is provided on the lower surface of the disc tray and is fitted to the guide projection. And is formed by a space between the groove surface of the guide groove that guides the forward and backward movement of the disk tray by cooperating with the guide protrusion,
The load receiving portion provided on the other side member is a lower end edge of a rib protruding downwardly forming the guide groove provided on the disc tray, and the side surface of the rib is formed as the groove wall surface. ,
The resin spring is formed of an upward resin piece integrally formed with the lower plate portion made of synthetic resin, and has a gradient that allows the load receiving portion to slide down and move in the return direction of the resin spring at the top of the resin piece. And the action portion formed of an inclined surface that is inclined with respect to the bending direction of the resin spring and abuts against the load receiving portion, and a continuous portion of the resin piece with respect to the lower plate portion includes a bending region of the resin spring. It is formed as a U-shaped bend that extends,
The position of the disc tray when the guide protrusion and the groove wall surface come into contact with each other and the inevitable gap disappears is defined as the reference position of the disc tray at the loading position, and the disc tray at the reference position And a disk device, wherein the disk is transferred between the scanning position and the scanning position. A disk tray that is moved back and forth between an initial position at which the disk is attached and detached and a loading position at which the disk is transferred relative to the scanning position by the optical pickup is attached to the casing. The inevitable gap formed between the tray and the other side member is displaced by applying the load of the resin spring provided on the one side member to the other side member and disappears. In the disk device designed to suppress the occurrence of
The disk device, wherein the acting portion of the resin spring that contacts the load receiving portion provided on the other side member is an inclined surface that is inclined with respect to the bending direction of the resin spring. 3. The disk device according to claim 2, wherein the inclined surface forming the action portion of the resin spring has a gradient that allows the load receiving portion to slide down and move in the return direction of the resin spring. The load receiving portion is a lower end edge of a rib provided on the disc tray and protruding downward, and the resin spring is integrally formed on a lower plate portion provided on the housing and positioned on the lower side of the disc tray. 4. The disk device according to claim 2, wherein the disk device is formed of an upwardly facing resin piece, and the operation portion is provided on a top portion of the resin piece. The unavoidable gap is provided on the upper surface of the lower plate portion, and is provided on the lower surface of the disc tray and is fitted to the guide projection and cooperates with the guide projection to advance and retract the disc tray. The disk device according to claim 4, wherein the disk device is formed by a space facing the groove wall surface of the guide groove for guiding the movement, and the groove wall surface of the guide groove is formed by a side surface of the rib. 6. The disk device according to claim 5, wherein the resin spring is formed such that a continuous portion with respect to the lower plate portion of the resin piece is a U-shaped bent portion extending a bending region of the resin spring.

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