JP4297237B2 - Disc clamp mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disk clamp mechanism used when a disk-shaped recording medium conveyed into a disk device is pressed and mounted on a turntable.
[0002]
[Prior art]
In general, a disk device for recording / reproducing a disc-shaped recording medium (hereinafter referred to as a disk) such as a CD or a DVD is a recording / reproducing device equipped with a turntable and an optical pickup for recording / reproducing the disk mounted on the turntable. A disk loading mechanism for loading / unloading the disk into / from the disk device, a disk clamping mechanism for mounting the disk on the turntable, and the like.
[0003]
Of these, the normal disk clamp mechanism is provided with a clamper at the other end of the clamper arm that rotates around one end, and presses the clamper against the disk conveyed on the turntable. Thus, the disc is mounted on the turntable. The clamper is rotatably attached to a clamper plate such as stainless steel (various SUS materials) with a smooth surface so that the clamper can be rotated together with the turntable and the disc while being crimped to the disc. By being screwed to the end of the clamper arm, the clamper arm is configured so that the clamper can be brought into and out of contact with the disc.
[0004]
Further, when the clamper is released from the disk, there may be a configuration in which a pressing member that comes into contact with the end portion of the clamper is provided in order to prevent generation of noise due to rattling of the clamper.
[0005]
[Problems to be solved by the invention]
By the way, the disk clamp mechanism as described above is disadvantageous in terms of cost because the clamper plate to which the clamper is attached is screwed to the clamper arm, so that the number of parts and the number of assembly steps are large.
[0006]
In addition, in order to absorb the contact between the presser member for preventing noise and the clamper, it is necessary to make the presser member have a special structure, which also leads to an increase in the number of parts and assembly man-hours. It was.
[0007]
The present invention has been proposed to solve the above-described problems of the prior art, and its purpose is to provide a disk clamping mechanism that can save costs by reducing the number of parts and the number of assembly steps. There is to do.
Another object of the present invention is to provide a disc clamping mechanism that can prevent noise from occurring while realizing reduction in the number of parts and the number of assembling steps and cost saving.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following technical features in a disk clamp mechanism that presses a disk onto a turntable by a clamper provided in the disk device.
[0009]
That is, the invention described in claim 1 is provided in a disk clamp mechanism that presses the disk onto the turntable by the clamper provided in the disk device, so that the disk can be moved in the direction of contacting and separating from the disk on the turntable. elevating member is provided on a surface of the elevation member is tapered projections are provided, wherein the clamper is mounted rotatably on a spring plate having elasticity, the left and right ends respectively of said spring plate, A support piece and a support portion for sandwiching the elevating member between the support piece are provided. The support piece is mounted to be displaceable with respect to the elevating member, and the support piece is formed into the tapered protrusion. by exceeding the sliding direction orthogonal to the direction of the right and left parts, the spring plate relative to the elevation member By engaging in the sliding direction, characterized in that to prevent disengagement of the spring plate. In the invention according to claim 1 as described above, the spring plate is not screwed to the elevating member but is simply mounted by being sandwiched between the support piece and the support portion, and the pressing force against the disk is caused by its elasticity and displacement. Therefore, the number of parts and the number of assembling steps can be reduced, and the cost can be saved.
[0010]
Further, the protrusion provided on the lifting member can prevent the lifting member and the spring plate from coming off.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(1) Configuration of Embodiment An embodiment of the present invention will be described below with reference to FIGS. That is, the present embodiment is configured by a lift plate 1, a spring plate 2, a clamper 3, and a presser unit 4 disposed above a disc playback unit in the disc player P, as shown in FIGS. 1 and 2. ing.
[0012]
As shown in FIGS. 1 to 3, the lift plate 1 is a plate in which a rectangular cutout 1 a is formed at a position corresponding to the turntable. As shown in FIG. 2 (A), tapered protrusions 1b are formed on the left and right sides of the notch 1a in the lift plate 1, respectively. The lift plate 1 is provided so as to be movable up and down around an axis 1c by an opening / closing mechanism (not shown).
[0013]
The spring plate 2 is a substantially rectangular plate formed of a SUS material or the like having a smooth surface, and elongated support pieces 2a and 2b protruding left and right are integrally formed at the four corners. As shown in FIG. 3, a support portion 2c is provided between the front and rear support pieces 2a and 2b to sandwich the lift plate 1 between the support pieces 2a and 2b.
[0014]
A clamper 3 is attached to the lower surface of the central portion of the spring plate 2. As shown in FIG. 5, the clamper 3 is obtained by fixing a mooring plate 3b, which is a small-diameter disk, on a pressing plate 3a, which is a large-diameter disk. The clamper 3 is attached to the spring plate 2 by inserting the mooring plate 3 b into the grip portion 2 d formed on the spring plate 2. The clamper 3 is configured to be rotatable and slightly movable in the 360 ° direction by a gap (play) between the mooring plate 3b and the grip portion 2d.
[0015]
As shown in FIG. 4, the spring plate 2 is inserted into the notch 1a so that the support pieces 2a, 2b are above the lift plate 1 and the support 2c is below. And when the back support piece 2a exceeds the protrusion 1b, the spring plate 2 is prevented from coming off.
[0016]
Furthermore, a disc loading mechanism is provided on the disc insertion opening side in a disc reproducing section provided with an optical pickup, its feed mechanism (not shown), a turntable (7 shown in FIG. 5), and the like. As shown in FIG. 1, the disk loading mechanism includes a loading roller 5, a driving mechanism (not shown), and a disk guide 6. The loading roller 5 is rotatably provided by a driving mechanism. The disk guide 6 is a member that holds the disk between the loading roller 5 and guides its movement. The disc guide 6 is integrally formed with a pressing portion 4 that abuts against the end portion of the pressing plate 3a of the clamper 3 when the disc is released.
[0017]
(2) Operation of Embodiment The operation of the above embodiment will be described below. First, when the disk is not inserted, the lift plate 1 is in a position rotated upward, and as shown in FIG. 5A, the clamper 3 is separated from the turntable 7 and has a disk insertion space. At this time, as shown in FIG. 1, the pressing portion 4 is in contact with the pressing plate 3a of the clamper 3, and the spring properties of the support pieces 2a and 2b in the spring plate 2 work, so that the vibration of the vehicle is transmitted. Backlash is automatically absorbed and noise generation is prevented.
[0018]
When a disc is inserted from the disc insertion slot of the disc player P, the disc is loaded by the disc loading mechanism and positioned on the turntable 7. Next, the lift plate 1 is rotated downward by the opening / closing mechanism, and the clamper 3 presses the disk D on the turntable 7 as shown in FIG. At this time, the spring plate 2 mounted non-fixed to the lift plate 1 absorbs excessive pressing force against the disk D due to the spring properties and slight displacement of the support pieces 2a and 2b, and the rigidity of the lift plate 1 is directly increased. Prevent working.
[0019]
As described above, after the disc is mounted on the turntable 7, reproduction by the optical pickup is performed on the disc rotated by the turntable. When the disc is ejected after the disc is reproduced, the lift plate 1 is rotated upward by the opening / closing mechanism to release the clamper 3 from the disc, and the disc is loaded from the turntable to the disc insertion opening side by the disc loading mechanism. Transport to. As described above, the presser portion 4 is brought into contact with the clamper 3 that has released the disk in this manner, thereby preventing the generation of noise.
[0020]
(3) Effects of the Embodiment According to the present embodiment as described above, the spring plate 2 can be incorporated by simply mounting it without being screwed to the lift plate 1. Assembling man-hours can be reduced and costs can be saved.
[0021]
Further, the spring property of the spring plate 2 absorbs the contact between the presser portion 4 and the clamper 3 and prevents noise, so that the presser portion 4 has a special structure. For example, as described above, it can be configured integrally with the disk guide 6, leading to further reduction in the number of parts and the number of assembling steps.
[0022]
(4) Other Embodiments The present invention is not limited to the above-described embodiment, and the material, size, shape, quantity, and the like of each member can be changed as appropriate. For example, the material of the spring plate 2 is not limited to the SUS material, and may be any material as long as the material can sufficiently obtain elasticity and smoothness with the clamper 3.
[0023]
The lift plate 1, the spring plate 2, the clamper 3, the disk guide 6, and the projections 1b, the supporting pieces 2a and 2b, and the presser 4 that are a part of them are also limited in shape and material to the above embodiment. is not. For example, the protrusion 1b may be a simple protrusion such as a boss instead of a tapered shape. Further, the pressing portion 4 may be provided on a member other than the disc guide 6. Further, the lift plate 1 may have a structure that moves up and down in a vertical direction instead of a structure that moves up and down by rotation.
[0024]
Further, the disk device to which the present invention is applied may be for recording / reproduction or for reproduction only, and any type or type may be used as long as it is an apparatus for a disk-shaped recording medium. It may be an apparatus that targets a recording medium of a size.
[0025]
【The invention's effect】
As described above, according to the present invention, it is possible to provide a disk clamping mechanism capable of saving costs by reducing the number of parts and the number of assembling steps.
Further, according to the present invention, it is possible to provide a disk clamp mechanism that can prevent noise from occurring while realizing reduction in the number of parts and the number of assembling steps and cost saving.
[Brief description of the drawings]
FIG. 1 is a plan view showing a disc player including an embodiment of a disc clamping mechanism of the present invention.
2 is a left side view (A) and a plan view (B) showing the embodiment of FIG. 1; FIG.
FIG. 3 is an exploded plan view of the embodiment of FIG. 1;
FIG. 4 is a plan view showing a state where the embodiment of FIG. 1 is being assembled.
FIGS. 5A and 5B are front views showing the spring plate and the clamper in the embodiment of FIG. 1, in which FIG. 5A shows when the disc is released, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Lift plate 1a ... Notch part 1b ... Projection part 1c ... Shaft part 2 ... Spring plate 2a, 2b ... Supporting piece 2c ... Supporting part 2d ... Grasping part 3 ... Clamper 3a ... Pressing plate 3b ... Anchoring plate 4 ... Holding part 5 ... Loading roller 6 ... Disc guide 7 ... Turntable

Claims (1)

In the disc clamp mechanism that presses the disc onto the turntable by the clamper provided in the disc device,
An elevating member provided so as to be movable in the direction of contacting and separating from the disk on the turntable is provided,
A taper-shaped protrusion is provided on the surface of the elevating member,
The clamper is rotatably attached to a spring plate having elasticity,
Wherein the left and right end portions respectively of the spring plate includes a support piece, support part is provided sandwiching the elevating member between said support piece,
The support piece is mounted so as to be displaceable with respect to the elevating member, and when the support piece exceeds the tapered protrusion in a sliding direction perpendicular to the left and right direction, the spring plate is moved up and down. A disc clamping mechanism, wherein the spring plate is prevented from coming off by being locked in a sliding direction with respect to a member.

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