JP2004185665A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To regulate the movement of a mechanism base with a simple mechanism in a disk drive in which the mechanism base is supported by an elastic support part in a chassis. <P>SOLUTION: When upward vibration (Z1 direction) is applied to the disk drive, the ring-shaped locking part 11b of a regulation member 11 moves in an X2 direction along a locking piece 2c to raise the regulating member 11 along a Z axis while a mechanism base 3 is moved in a Z1 direction. Thus, the excessive upward movement of the mechanism base 3 is regulated. The mechanism base 3 freely moves by the sliding of the ring-shaped locking part 11b on the locking piece 2c. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk device in which a mechanism unit is movably supported by an elastic support member with respect to a chassis, and more particularly to a disk device capable of restricting a mechanism unit from moving beyond a predetermined range with respect to the chassis.
[0002]
[Prior art]
In a disk drive for a vehicle, when a disk is inserted into an insertion slot provided at the front of the disk drive, the disk is drawn into the apparatus by a transport member having a feed roller and the like, and a mechanism provided inside the apparatus. Loaded into unit. Then, the disk is driven to rotate by a rotation drive unit provided in the mechanism unit, and data is reproduced or data is recorded by a head provided in the mechanism unit.
[0003]
The mechanism unit is supported by the elastic support member such as a rubber damper, an air damper, an oil damper, or a spring so as to be elastically movable with respect to the chassis. When the disk is rotated to perform the reproduction or recording, the mechanism unit elastically moves, thereby preventing the body vibration or the like from directly affecting the reproduction or recording operation.
[0004]
A lock mechanism is generally provided for locking the mechanism unit in a fixedly supported state in the chassis when the disc is not driven, when the disc is loaded, and when the disc is ejected from the insertion slot. It is a target.
[0005]
[Patent Document 1]
JP-A-10-188548
[Problems to be solved by the invention]
As described above, when the mechanism unit can move elastically and freely with respect to the chassis, when a large external force such as body vibration is applied, the mechanism unit moves so as to swing in an unnecessarily large range. As a result, there is a problem that the disk is damaged by hitting another member in the chassis.
[0007]
In a conventional disk drive, a clamp mechanism or the like that clamps a disk to a rotation drive unit is provided at a rear portion of the mechanism unit. It is possible to restrict the movement of the mechanism unit by applying the clamp mechanism to the ceiling surface in the chassis. However, in the front area of the mechanism unit facing the insertion slot, the transport path of the disk inserted from the insertion slot must be secured, so that the mechanism components cannot be disposed, and the mechanism unit moves upward. At this time, the front portion is likely to largely move upward, and the disc exposed in the front region of the mechanism unit is likely to hit other mechanisms in the chassis.
[0008]
As described above, when the mechanism unit largely moves upward, the movement of the rear portion of the mechanism unit is restricted by the clamp mechanism hitting a ceiling portion or the like in the chassis. Because the body can largely move upward, the mechanism unit may have an inclined posture in which the front part largely moves upward due to body vibration or the like. At this moment, when the operation of locking the mechanism unit to the chassis by the lock mechanism is performed by the ejection operation of the disk, the mechanism unit has the inclined posture in which the front is largely upward as described above, In some cases, the mechanism unit cannot be locked by the lock mechanism.
[0009]
An object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a disk device capable of restricting a moving range of a mechanism unit with respect to a chassis with a simple mechanism.
[0010]
[Means for Solving the Problems]
According to the present invention, a mechanism unit having a rotation drive unit for rotating and driving a disk and a head facing the disk is supported via an elastic support member so as to be movable at least along a first axis with respect to a chassis. In a disk device,
A regulating member is provided between the chassis and the mechanism unit, and the regulating member can be tilted toward both the chassis and the mechanism unit toward a second axis crossing the first axis. And the restricting member is movable toward at least one of the chassis and the mechanism unit toward the second shaft at at least one of the connecting portions,
The mechanism unit can be moved along the first axis with respect to the chassis by the movement of the regulating member, and the movement of the mechanism unit is regulated by the regulating member so as not to be separated from the chassis by a predetermined distance or more. It is assumed that.
[0011]
In this disk drive, the restricting member can perform an operation of falling down, and the restricting member is movable with respect to at least one of the chassis and the mechanical unit. It is possible to regulate the moving range of the mechanism unit.
[0012]
Further, in the present invention, the mechanism unit is elastically supported with respect to the chassis so as to be movable in both the first axis and the second axis,
The mechanism unit can move along the second axis with respect to the chassis by the movement of the regulating member.
[0013]
Further, in the present invention, the mechanism unit is elastically supported with respect to the chassis such that the mechanism unit can move along each of the first axis, the second axis, and a third axis crossing both of the two axes.
The regulating member is connected to both the chassis and the mechanism unit so as to be able to fall toward the third axis, and the mechanism unit moves along the third axis with respect to the chassis. Can be done.
[0014]
Also, in the present invention, for example, the regulating member is a rod-shaped body or a linear body having a predetermined length, and one end of the regulating member has a first shaft and a second shaft with respect to one of a chassis and a mechanical unit. The other end of the regulating member is slidable toward the second axis with respect to the other, and is connected to the second axis so as to be able to fall in the respective directions of the second axis and the third axis. And the third shaft so as to be able to fall down toward each of them.
[0015]
For example, the direction of the first axis is a direction orthogonal to the surface of the disc to be loaded. The direction of the first axis may be a direction along the surface of the disk.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an exploded perspective view showing an on-vehicle disk device equipped with a floating mechanism according to an embodiment of the present invention, FIG. 2 is a side view of the disk device when viewed from a direction II in FIG. 1, and FIG. 4 (A), 4 (B) and 4 (C) are cross-sectional views taken along the line IV-IV of FIG. 3 for explaining the operation of the main part of the present invention.
[0017]
In each of the drawings, axes orthogonal to each other in three-dimensional coordinates in space are indicated by an X axis, a Y axis, and a Z axis. In the following embodiments, the Z axis is the first axis, and the X axis is the first axis. The two axes and the Y axis are the third axes.
[0018]
As shown in FIGS. 1 and 2, the disk device 1 is provided with a chassis 2. The chassis 2 is a housing which itself becomes the outer surface of the apparatus. Alternatively, the chassis 2 may be fixed inside a separately provided housing.
[0019]
A mechanism unit A is provided inside the chassis 2. The mechanism unit A mainly includes a mechanism base 3 and a clamp arm 4.
[0020]
As shown in FIG. 2, the mechanism base 3 has a spindle motor M, a turntable T fixed to a rotating shaft M1 of the spindle motor M, and information recorded on the disk D or information is recorded on the disk D. A head mechanism H for recording is mounted. The head mechanism H includes a plurality of guide members 6a, 6a (only one guide member 6a is shown in FIG. 2) provided in the mechanism base 3 in parallel with the X-axis direction, and the guide members 6a, 6a It comprises an optical, magnetic or magneto-optical head unit 6 that moves along, and a threat mechanism that moves the head unit 6 along the guide members 6a, 6a.
[0021]
The clamp arm 4 is rotatably supported on a shaft 4 a provided on the mechanism base 3 as a fulcrum at an end of the mechanism unit A on the inner side of the apparatus. A clamper 8 is rotatably supported at the tip of the clamp arm 4. The clamp arm 4 is urged toward the mechanism base 3 by the force of a spring (not shown). When the center hole of the disk D is fitted on the turntable T, the clamper 8 is moved by the force of the spring. The disc D is pressed against the upper surface, and is clamped between the turntable T and the clamper 8.
[0022]
Further, the mechanism unit A is provided with a clamp release mechanism (not shown) for forcibly lifting the clamp arm 4, separating the clamper 8 from the disk D, and releasing the clamp.
[0023]
As shown in FIG. 1, damper members 9 and 9 functioning as elastic support members are provided on the bottom surface 2A of the chassis 2 at one location on the front side on the X1 side of the device and at two locations on the back side on the X2 side of the device. , 9 are provided. In each of the damper members 9, a bag 9a made of synthetic rubber is provided on a base 9b, and a relatively viscous fluid such as silicone oil is sealed in the bag 9a. A concave insertion support portion 9c is provided on the upper portion of the bag 9a.
[0024]
Support shafts 5, 5, 5 extending downward in the figure are provided on the lower surface of the mechanism base 3, and the distal ends of the support shafts 5, 5, 5 are inserted into the insertion support portions 9c of the bags 9a, 9a, 9a. , 9c, 9c. The mechanism unit A is supported so that it can be displaced in a predetermined range in each of the X-axis, the Y-axis, and the Z-axis by elastic deformation of the bag bodies 9a, 9a, 9a of the damper members 9, 9, 9. . A lock mechanism is provided between the chassis 2 and the mechanism unit A, and the mechanism unit A does not move in the chassis 2 when the disk D is loaded into the apparatus and ejected. To be locked.
[0025]
Locking portions 2a, 2a are provided above the apparatus back side (X2 side) of the chassis 2, and locking portions 3a, 3a are formed on the back side of the mechanism base 3. A coil spring S serving as an elastic support member is hung between the locking portions 2a of the chassis 2 and the locking portions 3a of the mechanism base 3. The mechanism unit A is also supported by the coil springs S, S such that it can move in the X-axis, Y-axis, and Z-axis directions in the chassis 2.
[0026]
FIGS. 2 and 4A show a state in which the mechanism unit A is balanced with the gravity by the force for supporting the mechanism unit A of the damper members 9, 9, 9 and the force for lifting the mechanism unit A of the coil springs S, S. It is a state of. Starting from this balanced state, the mechanism unit A can move in the directions of the X-axis, Y-axis, and Z-axis while receiving the elastic force of the elastic support members in a predetermined range. .
[0027]
A ceiling plate 2B is fixed behind the chassis 2 (X2 direction). As shown in FIG. 2, a gap is formed between the clamp arm 4 of the mechanism unit A and the ceiling plate 2B in a balanced state, and a rear portion (X2 side portion) of the mechanism unit A is It can move upwards within the gap. That is, the ceiling plate 2B can regulate the range in which the rear part of the mechanism unit A moves upward (Z1 direction).
[0028]
A hole 2b is formed in front (X1 side) of the bottom surface 2A of the chassis 2, and an elongated plate-like locking piece 2c extending in the X1 direction from the X2 side edge of the hole 2b is formed. On the other hand, in the front part of the mechanism unit A, a connecting portion 3b is integrally formed at the lower end of the mechanism base 3, and a connecting hole 3b1 is formed in the connecting portion 3b. The connecting portion 3b faces above the locking piece 2c.
[0029]
A regulating member 11 is stretched between the locking piece 2c on the chassis 2 side and the connecting portion 3b on the mechanism unit A side.
[0030]
The restricting member 11 in this embodiment is formed of a wire having a certain length and a certain degree of rigidity and elasticity, such as a steel wire or a copper wire. One end of the regulating member 11 is formed with a ring-shaped locking portion 11a whose end is formed in a ring shape, and the other end has a winding shaft orthogonal to the ring-shaped locking portion 11a. The oriented annular locking portion 11b is integrally formed.
[0031]
A ring-shaped locking portion 11a formed at one end of the regulating member 11 is connected so as to be inserted into the connecting hole 3b1 at the connecting portion 3b of the mechanism unit A. In this connecting portion, the regulating member 11 can be tilted with respect to the mechanism base 3 in each of the X-axis, the Y-axis, and the Z-axis.
[0032]
An annular locking portion 11b formed at the other end of the regulating member 11 is inserted through the outer periphery of the locking piece 2c. At the connection between the regulating member 11 and the chassis 2, the end of the regulating member 11 can slide freely in the X-axis direction along the locking piece 2 c. It is possible to freely fall in both the X-axis direction and the Y-axis direction.
[0033]
As shown in FIG. 2, an insertion slot 2 </ b> C into which a disc is inserted is opened in the front of the chassis 2. In addition, a transport member 7 having a feed roller is provided immediately inside the apparatus at the insertion port 2C. The disc D inserted from the insertion slot 2C is conveyed inward by receiving the conveying force from the feed roller of the conveying member 7, and when the center of the disc coincides with the rotation center of the turntable T. , The disc D is clamped by the clamper 8.
[0034]
Hereinafter, the disk device will be described.
In this disk device, the mechanism unit A is locked by the lock mechanism when the disk D is inserted and ejected. At this time, the mechanism unit A is fixed in the chassis 2 at substantially the same position as the balanced state shown in FIG. 2 and FIG. At this time, since the relative position between the transport member 7 and the mechanism unit A is determined, the disc D inserted from the insertion slot 2C is reliably transported between the turntable T and the clamper 8 by the transport member 7, The center of the disk D is clamped by being sandwiched between the turntable T and the clamper 8. When the disc D is ejected, the clamp by the clamper 8 is released, the disc D is transported by the transport member 7, and is ejected from the insertion port 2C. Also at this time, since the mechanism unit A does not move, the disc D can be reliably ejected from the insertion port 2C.
[0035]
The disk D is driven to rotate while being clamped by the turntable T and the clamper 8, and the reproducing operation and the recording operation are performed by the head unit 6. At this time, the lock by the lock mechanism is released, and Thus, the mechanism unit A can move within a predetermined range while being supported by the damper member 9 and the coil spring S. Therefore, it is possible to prevent the reading operation and the recording operation by the head unit 6 from being adversely affected by the external vibration.
[0036]
Here, as shown in FIGS. 4A, 4B, and 4C, when the mechanism unit A tries to move in the Z direction, one of the ring-shaped locking portions 11b of the regulating member 11 causes the locking piece 2c to move. In addition to sliding in the X-axis direction, the regulating member 11 can freely tilt toward the X-axis with respect to the locking piece 2c. Further, the other ring-shaped locking portion 11a of the regulating member 11 can also be freely inclined toward the X axis with respect to the connecting portion 3b of the mechanism unit A. Therefore, the movement of the mechanism unit A in the Z direction is not hindered by the regulating member 11.
[0037]
However, as shown in FIG. 4 (C), when the mechanism unit A attempts to rise a large distance from the chassis 2 in the Z1 direction, the regulating member 11 rises along the Z axis, and the mechanism unit A moves further upward. Can be regulated. In this embodiment, when the mechanism unit A attempts to largely move upward, in the rear part of the mechanism unit A, the clamp arm 4 hits the ceiling plate 2B to restrict further movement, and in the front part of the mechanism unit A, Then, the regulating member 11 rises up to be in a state of being stretched between the mechanism unit A and the chassis 2, whereby further movement of the front part is regulated, so that the mechanism unit A moves in an abnormally inclined state. Regulations can be prevented.
[0038]
Therefore, for example, a problem does not occur such that the front portion of the mechanism unit A is largely tilted upward and the mechanism unit A moves out of the movement area of the lock piece or the like of the lock mechanism, and the lock unit is locked.
[0039]
As described above, the movement range of the mechanism unit A can be limited by the single regulating member 11 formed of a wire that is not elastically deformed in the longitudinal direction. While ensuring, the movement of the mechanism unit A exceeding the predetermined range is restricted, and the clamped disk D can be reliably prevented from colliding with other members in the chassis 2 and being damaged.
[0040]
When the unlocked mechanism unit A attempts to move toward the bottom surface 2A of the chassis 2, as shown in FIG. 4B, the ring-shaped locking portion 11b of the regulating member 11 is locked by a locking piece. By sliding 2c in the X1 direction, the mechanism unit A can be allowed to move toward the bottom surface 2A.
[0041]
In addition, since the annular locking portion 11b of the regulating member can move in the X direction along the locking piece 2c, the mechanism unit A can move freely in the X axis direction within the chassis 2. Further, since the regulating member 11 can fall in the Y direction with respect to the mechanism base 3 and the regulating member 11 can also fall in the Y direction with respect to the chassis 2, The mechanism unit A can move in the Y direction relative to the chassis 2.
[0042]
As described above, the restricting member 11 restricts the upward movement of the mechanism unit A only in the state shown in FIG. 4C, and otherwise, the mechanism unit A does not move in the X axis, the Y axis, and the Z axis. It is possible to freely move in each direction, and the elastic support function of the damper member 9 and the coil spring S in each of the X, Y, and Z axes can be sufficiently exhibited.
[0043]
Note that the regulating member 11 may be formed of, for example, a synthetic resin. In this case, one end of the regulating member 11 is fixed to the mechanism unit A, and a thin hinge is formed on the regulating member 11 in the vicinity of the fixing portion so that the regulating member 11 falls down in each direction via the hinge. It may be. In addition, a rod-shaped shaft is provided on the chassis so that the other end of the regulating member can slide on the shaft. In the vicinity of the sliding portion, the regulating member 11 has a hinge capable of falling down in each direction. May be formed.
[0044]
Further, the connecting portion between the regulating member 11 and the mechanism unit A may allow the regulating member 11 to move in one direction, or the connecting portion between the regulating member 11 and the mechanism unit A, and the connecting portion between the regulating member 11 and the chassis 2. The restricting member 11 may be configured to move in one direction at both of the connecting portions.
[0045]
【The invention's effect】
As described above, according to the present invention, the moving range of the mechanism unit elastically supported in the chassis can be restricted by a simple mechanism. Further, the mechanism unit is restricted only in one direction of movement, and can freely move in the other direction, so that the elastic support state of the mechanism unit is not hindered.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a disk device equipped with a floating mechanism as an embodiment of the present invention;
FIG. 2 is a side view of the disk device as viewed from a direction II in FIG. 1,
FIG. 3 is a perspective view showing a main part of the present invention,
FIGS. 4A, 4B, and 4C are cross-sectional views taken along line IV-IV of FIG. 3 for explaining the operation of the main part of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disk device 2 Chassis 2A Bottom surface 2B Ceiling plate 2c Locking piece 3 Mechanical base 3b Connecting part 4 Clamp arm 7 Transport member 8 Clamper 9 Damper member 11 Restriction members 11a, 11b Ring-shaped locking part A Mechanical unit

Claims (5)

In a disk device, a mechanism unit mounted with a rotation drive unit for rotating the disk and a head facing the disk is supported via an elastic support member so as to be movable at least along a first axis with respect to a chassis.
A regulating member is provided between the chassis and the mechanism unit, and the regulating member can be tilted toward both the chassis and the mechanism unit toward a second axis crossing the first axis. And the restricting member is movable toward at least one of the chassis and the mechanism unit toward the second shaft at at least one of the connecting portions,
The mechanism unit can be moved along the first axis with respect to the chassis by the movement of the regulating member, and the movement of the mechanism unit is regulated by the regulating member so as not to be separated from the chassis by a predetermined distance or more. Disk device. The mechanism unit is elastically supported with respect to the chassis so as to move in both the first axis and the second axis,
The disk device according to claim 1, wherein the mechanism unit can move along the second axis with respect to the chassis by movement of the regulating member. The mechanism unit is elastically supported with respect to the chassis such that the mechanism unit can move along each of the first axis, the second axis, and a third axis that intersects both of the two axes.
The regulating member is connected to both the chassis and the mechanism unit so as to be able to fall toward the third axis, and the mechanism unit moves along the third axis with respect to the chassis. 3. The disk device according to claim 1, wherein The restricting member is a rod or a linear body having a predetermined length, and one end of the restricting member has a first axis, a second axis, and a third axis with respect to one of a chassis and a mechanical unit. The other end of the regulating member is slidable toward the second axis with respect to the other, and is connected to each of the second and third axes. 4. The disk device according to claim 3, wherein the disk device is connected so as to be able to fall down. 5. The disk device according to claim 1, wherein the direction of the first axis is a direction orthogonal to a surface of the disk to be loaded.

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