The present invention relates to a disk apparatus that incorporates and rotates a disk.
There is known as a conventional disk apparatus a disk clamp unit that utilizes magnetic force of a magnet and that is fixed coaxially and removably to a rotating shaft of a spindle motor that rotates a disk (see patent literature 1, for example).
In a conventional disk clamp unit, a laminate comprising a hollow, flat permanent magnet and yoke is fixed inside a recess provided on a side opposite a clamper of a disk chuck section. This permanent magnet is positioned by means of a step section inside the recess.
However, as shown in
It is therefore an object of the present invention to provide a disk apparatus that enables further thinning of a disk clamp unit.
A disk apparatus of the present invention is provided with a spindle motor that positions and rotates a disk, an alignment ring that is fixed to a rotating shaft of the spindle motor, and a clamp section that mounts the disk on the spindle motor; wherein the alignment ring has a projecting section formed around the rotating shaft of the spindle motor, and a magnetic attraction section provided around the rotating shaft of the spindle motor with a space provided between the magnetic attraction section and the projecting section; and the clamp section has a center member having formed therein a recessed space into which the projecting section is fitted, and a member to be attracted that is attracted by the magnetic attraction section, and mounts the disk on the spindle motor by means of fitting of the projecting section into the recessed space and attraction by the magnetic attraction section.
By means of this configuration, a disk apparatus of the present invention enables a disk to be clamped by having a clamp section positioned in an alignment ring and having the clamp section attracted toward a disk rotation section by a magnetic attraction section.
Also, a disk apparatus of the present invention makes possible a clamp section centering configuration that suppresses thickness since a projecting section provided so as to be positioned around a rotating shaft of a spindle motor in an alignment ring fits into a recessed space formed by an annular projecting section of the clamp section.
Also, in a disk apparatus of the present invention, the center member has a groove-shaped section, the member to be attracted has an engaging projecting section capable of engaging in the groove-shaped section, and the clamp section has a configuration in which the center member and the member to be attracted are combined by means of engagement of the groove-shaped section and the engaging projecting section.
By means of this configuration, a disk apparatus of the present invention enables incorporation of a clamp section to be performed by means of a simple operation of fitting an engaging projecting section formed on a section to be attracted in a groove shape.
Also, a disk apparatus of the present invention is further provided with a clamp guide that holds the clamp section so as to be able to be moved toward or away from the spindle motor; wherein the clamp section has a curved-surface raised section that rotates in accordance with rotation of the spindle motor and comes into contact with the clamp guide at the center of that rotation, and a groove provided around the curved-surface raised section.
By means of this configuration, even if a lubricant such as grease applied to the surface of the curved-surface raised section surface flows out toward the periphery of the curved-surface raised section during disk rotation, a disk apparatus of the present invention can keep the lubricant inside a recess provided around the raised section, and prevent the lubricant from adhering to the clamped disk.
In a disk apparatus of the present invention, a projecting section formed on a spindle motor rotating shaft and alignment ring fits into a recessed space formed in a center member of a clamp section. By this means, the clamp section centering configuration can be made thin, and a disk apparatus can be provided in which further thinning of the disk clamp unit is made possible.
Now, an embodiment of the present invention will be described using
In this embodiment, based on an actual usage state of a disk apparatus, a surface in which there is a disk insertion aperture is defined as the front surface, the horizontal direction as the X direction (taking the right direction as the forward direction), the depth direction as the Y direction (taking the depth direction as the forward direction), and the thickness direction as the Z direction (taking the upper surface direction as the forward direction).
This car audio apparatus 600 incorporates radio 601, cassette tape player 602, and so forth, in addition to a disk apparatus. Front panel 603 of car audio apparatus 600 has display section 603A and power/volume knob 603B used for all functions, disk insertion/ejection aperture 604A for the disk apparatus, radio tuning knob 601A, cassette tape insertion/ejection aperture 602A, and so forth. Inside, car audio apparatus 600 has a control section (not shown) that controls the radio, cassette tape player, disk apparatus, and so forth.
Disk clamp unit 700 is installed on base chassis 100, and is provided with spindle motor 300, alignment ring 301, clamp section 400, and clamp guide 500.
Spindle motor 300 has disk 200 mounted thereon, and rotates mounted disk 200. Alignment ring 301 is fixed to the rotating shaft of spindle motor 300, and guides center hole 200A of disk 200 when disk 200 is mounted on spindle motor 300. More specifically, alignment ring 301 guides center hole 200A so that a virtual axis passing through the center of center hole 200A of disk 200, and the rotating shaft of spindle motor 300, are coaxial. Clamp section 400 clamps disk 200 between clamp section 400 and spindle motor 300 when disk 200 rotates. Clamp guide 500 holds clamp section 400, moving clamp section 400 toward or away from spindle motor 300. In
Next, the configuration of spindle motor 300 and clamp section 400 will be described using
Positional regulation of disk 200 will now be described.
Disk 200 mounted on spindle motor 300 has its movement in the X direction and in the Y direction restricted by disk guide surface 301A of alignment ring 301, and is restricted to a position in which it becomes coaxial with the rotating shaft of spindle motor 300. By being clamped between spindle motor 300 and clamp section 400, disk 200 mounted on spindle motor 300 has its movement in the Z direction with respect to spindle motor 300 restricted. That is to say, disk 200 is mounted on spindle motor 300 by clamp section 400.
Alignment ring 301 has space 301B capable of accommodating magnet 302. Also, alignment ring 301 has annular magnet 302, fixed to a surface forming 301B, inside this 301B. Magnet 302 is a magnetic attraction section that magnetically attracts clamp section 400. Magnet 302 may be placed around the rotating shaft of spindle motor 300, or a mode may be used in which alignment ring 301 is placed outward of magnet 302, for example.
Clamp section 400 has a configuration in which center member 401 and member to be attracted 402 are combined. Member to be attracted 402 is made of a material having physical properties enabling magnetic attraction (such as iron), and is magnetically attracted in the negative direction of the Z direction by the magnetic attractive force of magnet 302. As a result, clamp section 400 clamps disk 200 between clamp section 400 and spindle motor 300. Center member 401 is stacked on member to be attracted 402, and annular projecting section 401A is formed on center member 401. Annular projecting section 401A passes through a hole formed in the center part of member to be attracted 402, and projects from the lower surface of member to be attracted 402.
Centering of clamp section 400 with respect to spindle motor 300 will now be described.
Recessed space 401G is formed in annular projecting section 401A formed on center member 401 of clamp section 400. Annular projecting section 401A is made annular in shape by this recessed space 401G. Alignment ring 301 is fixed to rotating shaft 300A of spindle motor 300, and ring-shaped projecting section 301C is formed around rotating shaft 300A on alignment ring 301. When disk clamping is performed, projecting section 301C of alignment ring 301 fits into recessed space 401G formed in annular projecting section 401A of center member 401 of clamp section 400. By this means, clamp section 400 has its movement in the X direction and Y direction with respect to spindle motor 300 restricted, and is centered with respect to spindle motor 300.
Also, as shown in
Also, as shown in
Also, in this embodiment, member to be attracted 402 is placed at the bottom of the center member 401 laminate. By this means, the relative distance of member to be attracted 402 subjected to the magnetic attractive force of magnet 302 can be shortened to a position at which contact with magnet 302 is possible. Therefore, magnetic attractive force exerted by magnet 302 can be maximized, and the disk 200 holding performance of magnet 302 can be improved.
Next, the configuration of clamp section 400 will be described using
Projecting section 301C of alignment ring 301 fits into recessed space 401G formed in annular projecting section 401A of center member 401. Consequently, considering the securement of mutual slidability with respect to alignment ring 301 and the prevention of damage to center member 401 and alignment ring 301, it is desirable to use a resin material for center member 401. On the other hand, it is also possible to form center member 401 using a metallic material. Member to be attracted 402 is made of a material having physical properties enabling magnetic attraction by magnet 302 (such as iron).
As shown in
Clamp guide 500 shown in
As shown in
The procedure for assembling center member 401 and member to be attracted 402 of clamp section 400 will now be described.
The procedure for assembling center member 401 and member to be attracted 402 is as follows. First, a state (the state shown in
Thus, assembly of center member 401 and member to be attracted 402 for clamp section 400 having the above-described configuration is simple. Also, in clamp section 400 having the above-described configuration, engaging projecting sections 402D of member to be attracted 402 fit into circular holes 401D formed in center member 401. By this means, clamp section 400 enables the possibility of assembly of member to be attracted 402 with respect to center member 401 failing due to vibration, shock, or suchlike disturbances to be reduced.
Next, a configuration for moving clamp section 400 toward or away from spindle motor 300 (hereinafter referred to as a “guide configuration”) will be described using
In
Fulcrum shaft 101 (L) and fulcrum shaft 101 (R) are provided on base chassis 100. Clamp arm 501 is an arm that is supported pivotably by fulcrum shaft 101 (L) and fulcrum shaft 101 (R) of base chassis 100, and that has clamp guide 500 fixed to it by swaging. Clamp guide 500 is configured and placed in such a way as to confine the peripheral edge of clamp section 400.
Bent section 501A (L) and bent section 501A (R) are formed and placed on clamp arm 501 so as to be bilaterally symmetrical with respect to clamp section 400. Also, bent section 500A (L) and bent section 500A (R) are formed on clamp guide 500. Movement of clamp arm 501 in the forward direction of the Z direction is restricted by stacked placement of bent section 501A (L) and bent section 501A (R) above this bent section 500A (L) and bent section 500A (R).
Receiving section 501B (L) and receiving section 501B (R) are formed and placed on clamp arm 501 so as to be bilaterally symmetrical with respect to clamp section 400. Also, circular-arc-shaped bent section 500B (L) and circular-arc-shaped bent section 500B (R) are formed on clamp guide 500. Movement of clamp arm 501 in the negative direction of the Z direction is restricted by stacked placement of receiving sections 501B below this circular-arc-shaped bent section 500B (L) and circular-arc-shaped bent section 500B (R).
On the right and left of clamp arm 501 a side surface curve is formed that extends in the base chassis 100 direction. Hole 501C (L) is provided in the left-hand side surface curve, and hole 501C (R) is provided in the right-hand side surface curve (neither of which is shown). Fulcrum shaft 101 (L) and fulcrum shaft 101 (R) provided on base chassis 100 fit into hole 501C (L) and hole 501C (R) respectively, and are supported pivotably. Shaft 102 is installed in a fixed manner on one of the side surface curves of clamp arm 501. Shaft 102 is in contact with cam surface 502A of slider 502.
Surface 500D is formed on clamp guide 500 at a position above clamp section 400. Bent sections 500A, bent sections 500C, and bent section 500E are formed on surface 500D at positions corresponding to the outer periphery of center member 401 of clamp section 400. Movement of clamp section 400 in the XY plane direction is restricted by the outside of approximately disk-shaped section 401F of center member 401 being in contact with bent sections 500A, bent sections 500C, and bent section 500E.
Circular-arc-shaped bent section 500B (L) and circular-arc-shaped bent section 500B (R) are formed and placed on clamp guide 500 so as to be bilaterally symmetrical with respect to clamp section 400. Also, circular-arc-shaped bent sections 500B are placed below brim section 402A of member to be attracted 402 of clamp section 400, in contact with brim section 402A. Therefore, movement of clamp section 400 in the Z direction is restricted by surface 500D on the upper side, and is restricted by circular-arc-shaped bent sections 500B on the lower side.
By means of the above-described configuration, clamp section 400 is positionally confined by clamp guide 500. By this means, separation of clamp section 400 from clamp guide 500 due to a shock or suchlike disturbance can be prevented while stably maintaining a clearance between clamp section 400 and clamp guide 500.
Slider 502, motor 504 that is the slider 502 drive source, and gear train 503, are installed on base chassis 100. The driving force of motor 504 is transmitted to rack section 502B of slider 502 via gear train 503. That is to say, slider 502 and gear train 503 have a configuration enabling slider 502 to move in the Y direction through forward/reverse rotation of motor 504.
When disk clamp unit 700 attempts to move clamp section 400 toward spindle motor 300, slider 502 is moved in the negative direction of the Y direction by motor 504 drive. At this time, shaft 102 in contact with cam surface 502A of slider 502 moves along cam surface 502A in the negative direction of the Z direction, and clamp arm 501 pivots with fulcrum shafts 101 as spindles. As a result, clamp guide 500 and clamp section 400 move toward spindle motor 300.
Conversely, when disk clamp unit 700 attempts to move clamp section 400 away from spindle motor 300, slider 502 is moved in the forward direction of the Y direction by reverse drive of motor 504. At this time, shaft 102 in contact with cam surface 502A of slider 502 moves along cam surface 502A in the forward direction of the Z direction, and clamp arm 501 pivots with fulcrum shafts 101 as spindles. As a result, clamp guide 500 and clamp section 400 move away from spindle motor 300.
By means of the above operations, disk 200 mounted on spindle motor 300 is clamped between spindle motor 300 and clamp section 400.
In the above-described embodiment, a configuration whereby clamp section 400 is moved in the Z direction by movement of slider 502 provided on base chassis 100 has been described as a configuration that clamps disk 200, but the present invention is not limited to this. For example, disk 200 can also be clamped by means of a configuration whereby base chassis 100 is moved in the Z direction with respect to clamp section 400.
Also, a configuration has been assumed in which clamp arm 501 and clamp guide 500 are separate parts, but the present invention is not limited to this, and, for example, a so-called integral configuration may also be used for clamp arm 501 and clamp guide 500, whereby clamp arm 501 is given the function of clamp guide 500.
Thus, according to the present invention, rotating shaft 300A of spindle motor 300 and projecting section 301C of alignment ring 301 fit into recessed space 401G formed in annular projecting section 401A formed on center member 401 of clamp section 400. By this means, the present invention provides a disk apparatus that makes possible further thinning of clamp section 400 and a centering configuration for clamp section 400 (disk clamp unit).
The disclosure of Japanese Patent Application No. 2008-322150, filed on Dec. 18, 2008, including the specification, drawings and abstract, is incorporated herein by reference in its entirety.
As described above, a disk apparatus according to the present invention provides for a projecting section formed on a spindle motor rotation axis and alignment ring to be fitted into a recessed space formed by an annular projecting section of a clamp section, and therefore has an effect of making a clamp section centering configuration thin. That is to say, a disk apparatus according to the present invention is suitable for use as a disk apparatus that enables further thinning of a disk clamp unit to be achieved.
Number | Date | Country | Kind |
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2008-322150 | Dec 2008 | JP | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/JP2009/007019 | 12/18/2009 | WO | 00 | 2/15/2011 |