JP2004220666A - Disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To drive a disk drive having a chucking structure that can simplify and save the space, without using magnetic force. <P>SOLUTION: The disk drive has a turntable on which a disk is mounted and a chucking means pressing the disk to the turntable, and the chucking means is fixed to the upper case composing a part of a housing of the disk drive. Since the chucking means is disposed at the upper case, a chassis is not required to be provided and fixed in the housing, and the disk drive saving the space can be provided. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk drive that records information using a disk such as a CD-ROM, a CD-R, a CD-RW, and a DVD-ROM, and reproduces the information. In particular, the present invention relates to a disk drive with an improved chucking structure.
[0002]
[Prior art]
In recent years, disks such as CDs have become widespread as information recording media. Furthermore, compact desktop or portable disk drives are also widely used. In such a disk drive, after the disk is mounted on the turntable, the disk is chucked on the turntable so that even if the disk is rotated for reproducing or writing information, no blur occurs.
[0003]
As the most common chucking method, a structure using magnetic force is well known. In this structure, for example, a magnet is arranged on the turntable side, and a rotatable metallic clamper receiving the magnetic force is arranged above the turntable. Then, after the disc is placed on the turntable, the disc is clamped by magnetic force by approaching the clamper and set on the turntable. Further, as shown in Patent Document 1, there is a proposal for a structure in which a leaf spring 10a for pressing the clamper 10 is added to the disk side.
[0004]
[Patent Document 1] JP-A-10-83607
[Problems to be solved by the invention]
However, when no disk is loaded in the chucking structure employing the above-described magnet, the clamper comes into direct contact with the turntable, and both are firmly connected. When an eject operation is performed to load a disk from such a state, a large load based on magnetic force may be applied to a power system such as a loading gear. Furthermore, when the clamper coupled by magnetic force is peeled off, a peeling sound may be generated. When the peeling sound is generated as described above, the quality of the disk drive as a product is deteriorated.
[0006]
Further, when a leaf spring is used for chucking as disclosed in Patent Document 1, it is necessary to provide a new member for fixing the leaf spring. As a result, a space for arranging these members must be ensured, which increases the size of the disk drive and increases the cost. Further, since the conventional chucking mechanism is configured to support the clamper by a chassis or the like provided in the casing of the disk drive, a space for holding the clamper is required in the casing, which promotes miniaturization. Had been an obstacle.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned conventional problems and to provide a disk drive having a chucking structure that can be simply and space-saving without using a magnetic force.
[0008]
[Means for Solving the Problems]
An object of the present invention is to provide a disk drive including a turntable on which a disk is mounted and chucking means for pressing the disk against the turntable, as claimed in claim 1, wherein a housing of the disk drive is provided. Can be achieved by a structure in which the chucking means is fixed to an upper case forming a part of the chucking means. According to another aspect of the present invention, there is provided a disk drive including a turntable on which a disk is mounted, and chucking means for pressing the disk against the turntable. The means can also be achieved by a structure fixed to an opening provided in an upper case forming a part of the disk drive housing so as to form a part of the upper case. According to the present invention, since the chucking means is provided in the upper case, there is no need to provide and fix a chassis in the housing, and the disk drive can be provided as a space-saving disk drive.
[0009]
The chucking means can be formed by a cover portion that is elastically deformed and a pulley portion that receives a pressing force from the cover portion toward the disk and rotates with the turntable. The pulley portion may include a plate in contact with the cover portion and rotatably provided with respect to the cover portion, and a clamper fixed to the plate and in contact with the disk. With such a configuration, the clamper of the pulley portion can be pressed against the disk based on the elastic force of the cover portion, so that the disk can be reliably rotated while being chucked. Further, since no magnetic force is used, no load is applied to the drive system and no peeling sound is generated. Further, since a member such as a leaf spring is not added to the conventional chucking structure, and the structure is simple, the cost can be reduced.
[0010]
Further, the cover portion is formed in an annular shape and fixed to the upper case, a contact portion disposed inside the base portion and in contact with the plate, and a base portion and the contact portion. It can be formed with an elastic arm portion that connects by making the relative position in the vertical direction variable. Then, at least one contact portion on the cover portion side in contact with the pulley portion and on the pulley portion side in contact with the cover portion is molded into a shape having a top portion for smooth rotation of the pulley portion. It is desirable.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an outline of a disk drive according to an embodiment. FIG. 1A shows an ejected state in which a tray on which a disk D is placed is pulled out from the disk drive 1, and FIG. 1B shows a state in which the disk D placed on the tray is loaded into the disk drive 1. It is a figure showing a state.
[0012]
In the housing of the disk drive 1, a lower bottom case 3 and an upper top case 4 are connected and integrally formed. A cutout is provided in a side portion of the housing, from which the tray 11 can be pulled out. The tray 11 can be taken in and out of the housing by a drive mechanism (not shown), so that the disc D on the mounting surface can be held, loaded into the disc drive 1, and pulled out. .
[0013]
A motor 13 for driving the optical pickup device 12 and the turntable 14 is arranged in the housing. These are fixed to the mechanical chassis 10. The mechanical chassis 10 is connected to columns 17, 17 rising from the bottom case 3, and is set so as to be movable in a vertical direction by a driving source (not shown). In the eject state shown in FIG. 7A, the mechanical chassis 10 is moved to the bottom side by the drive source, and in the loading state shown in FIG. 7B, the turn table 14 is moved upward by the drive source, and the disk D on the tray is moved upward. It is pushed up.
[0014]
The disk drive 1 according to the present embodiment has a configuration that does not exist in the related art, particularly with respect to chucking means for clamping the disk D from above. The chucking means 20 of the disk drive 1 is formed so as to form a part of the top case 4. That is, the clamper member for pressing the disk D from above is projected slightly downward from the upper portion of the top case 4, and is not a structure in which the clamper is held by the chassis arranged in the housing as in the related art. . Therefore, the disk drive 1 according to the present embodiment has a structure for saving space.
[0015]
FIG. 2 is an enlarged view of the chucking means 20. (A) is an enlarged view of the chucking means 20 fixed to the top case, and (B) is an enlarged view of an elastic component included in the chucking means. In FIG. 2A, an opening 5 is formed on the upper surface of the top case 4. The periphery of the opening 5 is formed in a mortar shape by processing the edge 4 a of the top case 4 downward. The chucking means 20 is just stored in the mortar-shaped space.
[0016]
The chucking means 20 includes a resilient pulley cover 21 serving as a cover, and a pulley disposed below the pulley cover 21. The pulley portion includes a configuration that receives a pressing force from the pulley cover 21 toward the disk D and rotates with the turntable 14. The pulley portion includes a plate 25 rotatably provided with respect to the pulley cover 21, and a clamper 27 fixed to the plate 25 and abutting on the disk D. The clamper 27 has a substantially trapezoidal cross section, and its head projects downward from the opening 5.
[0017]
FIG. 2B is a plan view showing the pulley cover 21 serving as an elastic part. The pulley cover 21 has a base portion 22 formed in an annular shape and fixed to the top case 4 side, a contact portion 24 disposed inside the base portion 22 and in contact with the plate 25, and a contact portion with the base portion 22. And three arm portions 23a to 23c having elasticity which are connected to the portion 24 so as to be relatively movable in the vertical direction. The pulley cover 21 is formed in a mortar shape similarly to the opening 5 so that the contact 23 is subjected to a force from below, so that the elastic arm 23 is deformed and deformed. The structure is such that the part 24 is allowed to move upward. The pulley cover 21 having such a shape can be integrally formed by, for example, pressing stainless steel having predetermined elasticity.
[0018]
FIG. 2A shows a state where the clamper 27 and the disk D are not in contact with each other. In this state, the pulley cover 21 is not deformed, and the pulley cover 21 is not in a state of applying a force to the plate 25. On the other hand, FIG. 3 is a view showing a state in which the turntable 14 is raised and the disc D is pressed against the clamper 27. FIG. 3 corresponds to the state shown in FIG. In the case of FIG. 3, when the turntable 14 raises the disk D, the disk D pushes up the clamper 27, and the force is transmitted to the pulley cover 21 via the plate 25. At this time, since the pulley cover 21 is fixed to the top case 4, the above-described arm 23 is deformed and the pulley cover 21 is deformed so as to reduce the thickness. As a result, the pulley cover 21 generates a pressing force, and the clamper 27 contacts the disk D. Therefore, in the present disk drive, the disk D is reliably chucked between the turntable 14 and the clamper 27.
[0019]
In the disk drive 1 having the above-described configuration, the disk is chucked without employing a magnet unlike the related art, so that the problem of the load applied to the drive system is solved. Also, the problem of pealing noise generated when the magnet and the metal clamping member are peeled off is eliminated. Further, since the present disk drive 1 does not have a structure in which a new leaf spring is added to chucking, a plate for fixing the leaf spring is not required and a compact chucking mechanism is formed. Further, since the upper chucking mechanism conventionally fixed to the mechanical chassis or the like is incorporated so as to form a part of the top case 4 in the disk drive 1, the entire apparatus can be made compact.
[0020]
In this embodiment, it is sufficient that the base 22 of the pulley cover 21 in the chucking mechanism is fixed to the top case 4 by a suitable connecting means. For example, as shown by a dotted line 7 in FIG. 3, the pulley cover 21 may be fixed using an adhesive film that covers the entire upper portion of the pulley cover 21. When the film 7 is used in this manner, a predetermined mark or number can be attached to the upper portion thereof, which is convenient, and it is also preferable that dust can be prevented from entering the housing.
[0021]
FIG. 4 is a diagram showing another example of a structure for fixing the pulley cover 21 to the top case 4. In this example, the end of the top case 4 is formed to have a substantially U-shaped cross section. The base 22 of the pulley cover 21 is fitted in the space of this cross section. With such a structure, particularly when the pulley cover 21 receives an upward force, the fixed state is maintained, and the clamper can be reliably pressed toward the disk.
[0022]
FIG. 5 is a diagram showing an improved example of a connection portion between the pulley cover 21 and the plate 25. The plate 25 receives an elastic force (pressing force) from the pulley cover 21, transmits the elastic force (pressing force) to the clamper 27, becomes integral with the clamper 27, and rotates with the rotation of the disk D. Therefore, it is desirable that the portion where the plate 25 comes into contact with the pulley cover 21 has a shape having a top portion where the rotation of the plate 25 is smooth. Therefore, in FIG. 5, a hemispherical projection 28 is provided at a contact portion of the pulley cover 21. In addition, such a protrusion may be provided on the plate 25, or may be provided on both the pulley cover 21 and the plate 25.
[0023]
In the above embodiment, the force that presses the disk D on the turntable 14 against the clamper 27 is generated by raising the mechanical chassis 10, but the present invention is not limited to such a configuration. For example, in the case of a compact disk drive in which the top case is hingedly connected to the bottom case and opened and closed, the tray is fixed in the housing, and the loading state is formed when the operator closes the top case. . Therefore, the present invention can be applied to this type of disk drive if it is designed so that a predetermined pressing force is generated between the clamper and the disk when the top case is closed.
[0024]
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the specific embodiments, and various modifications may be made within the scope of the present invention described in the appended claims.・ Change is possible.
[0025]
【The invention's effect】
As described above, according to the present invention, since the chucking means is provided in the upper case, it is not necessary to provide and fix the chassis in the housing, and the space is saved. Can be provided as a disk drive. In particular, when the chucking means is formed by a cover portion that is elastically deformed and a pulley portion that receives a pressing force from the cover portion toward the disk, the pulley portion can be pressed against the disk, and the disk can be rotated while chucking reliably. Can be. Further, since no magnetic force is used, no load is applied to the drive system and no peeling sound is generated. Further, since a member such as a leaf spring is not added to the conventional chucking structure, and the structure is simple, the cost can be reduced.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams showing an outline of a disk drive according to an embodiment, wherein FIG. 1A is a diagram showing an ejected state in which a tray for mounting a disk is pulled out, and FIG. FIG. 5 is a diagram showing a loaded state.
FIGS. 2A and 2B are enlarged views of the chucking means. FIG. 2A is an enlarged view of the chucking means fixed to the top case, and FIG. 2B is an elastic component included in the chucking means. It is the figure which expanded and showed.
FIG. 3 is a view showing a state in which a turntable is raised and a disc is pressed against a clamper.
FIG. 4 is a diagram showing another example of a structure for fixing a pulley cover to a top case.
FIG. 5 is a diagram showing an improved example of a connection portion between a pulley cover and a plate.
[Explanation of symbols]
D disk 1 disk drive 4 top case (upper case)
5 opening 10 chassis 11 tray 14 turntable 20 chucking structure (chucking means)
21 Pulley cover (cover part)
22 Base parts 23a to 23c Arm part 24 Contact part 25 Plate (pulley part)
27 Clamp (Pulley part)

Claims (10)

A disk drive comprising a turntable on which a disk is mounted, and chucking means for pressing the disk against the turntable,
A disk drive, wherein said chucking means is fixed to an upper case forming a part of a housing of the disk drive. A disk drive comprising a turntable on which a disk is mounted, and chucking means for pressing the disk against the turntable,
The disk drive, wherein the chucking means is fixed to an opening provided in an upper case forming a part of a housing of the disk drive so as to form a part of the upper case. The disk drive according to claim 1 or 2,
A disk drive, wherein the chucking means includes a cover portion that is elastically deformed, and a pulley portion that receives a pressing force from the cover portion toward the disk and rotates with the turntable. The disk drive according to claim 3,
The disk drive according to claim 1, wherein the pulley portion includes a plate in contact with the cover portion and rotatably provided with respect to the cover portion, and a clamper fixed to the plate and in contact with the disk. The disk drive according to claim 3,
A base portion formed in an annular shape and fixed to the upper case; a contact portion disposed inside the base portion and in contact with the plate; and a vertical direction between the base portion and the contact portion. And a resilient arm for making the relative position variable and connecting. The disk drive according to claim 5,
The disk drive is characterized in that the cover is formed integrally by punching an elastic metal plate. The disk drive according to claim 3,
At least one contact portion on the cover portion side in contact with the pulley portion and the pulley portion side in contact with the cover portion is molded into a shape having a top portion for smooth rotation of the pulley portion. A disk drive characterized by the following. The disk drive according to any one of claims 1 to 7,
A disk drive further comprising a moving mechanism for bringing the chucking means closer to the disk surface. A component used for chucking means for pressing a disk on a turntable of a disk drive,
A contact portion provided inside the annular base portion; and an arm portion having elasticity for changing the relative position of the base portion and the contact portion in the vertical direction and connecting the base portion and the contact portion. Disk drive chucking parts. The chucking component for a disk drive according to claim 9,
The chucking component for a disk drive, wherein the base has a shape corresponding to an opening formed in an upper case forming a part of a housing of the disk drive.

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