JP4311401B2 - Disc clamp mechanism - Google Patents

Description

  The present invention relates to a disc clamping mechanism for CDs, DVDs and the like.

  Conventionally, various disc clamping mechanisms have been proposed. For example, noise and vibration generated between the disk clamper and the clamper plate when chucking or releasing chucking can be reduced, and the frictional force acting between the disk clamper and the clamper plate can also be reduced. A disk clamp mechanism is disclosed in Patent Document 1.

  Specifically, a disc clamp provided with a disc clamper that is provided opposite to a turntable on which a disc is mounted and clamps the disc in cooperation with the turntable, and a clamper plate that rotatably holds the disc clamper An elastic member made of rubber or thermoplastic elastomer is provided on the contact surface of the disk clamper with the disk and the surface of the disk clamper facing the clamper plate, and the surface facing the clamper plate The sliding member is provided on the surface of the provided elastic member.

  Also, the loading motor load is reduced by reducing the disc thickness variation and the difference in holding force without the disc without increasing the magnet's magnetic force even at high-speed rotation of the disc. An information disk recording / reproducing apparatus with low noise is disclosed in Patent Document 2.

Specifically, a pickup for recording / reproducing information on a disc for information recording / reproduction, a tray on which the disc is placed, the tray is pulled out of the apparatus main body, and the pickup in the apparatus main body includes A conveying mechanism that conveys to an installed site, a spindle motor that rotates a disk, a pressure contact member that is disposed opposite to a disk receiving member provided in the spindle motor, and a magnetic force that connects the pressure contact member and the disk receiving member to each other. In an information disc recording / reproducing apparatus comprising a magnetized body that is attracted by a magnet and sandwiches the disc, when the interval between the pressure contact member and the disc receiving member is larger than the interval when there is no disc in the tray The pressure contact member includes a biasing member that applies a biasing load to the disk side.
JP 2004-139665 A JP 2003-91904 A

  However, all the configurations described in the above patent documents are based on the premise that a magnet is used for disc clamping, and noise and vibration problems that occur when chucking or unchucking a disc. Could not be solved fundamentally.

  In view of such problems, the present invention provides a disk clamp mechanism that can fundamentally solve the problems of noise and vibration that occur when a disk is chucked or unchucked with a simple configuration. The purpose is to provide.

In order to achieve the above object, according to the present invention, in a disc clamping mechanism in which a disc is clamped between a clamper and a turntable to perform recording or reproduction on the disc, the disc is moved in the left-right direction of the main chassis. The clamper holder is provided with a clamper holding portion at the center thereof, and a clamping force is applied by pressing the center portion of the clamper disposed in the longitudinal direction of the clamper holder and held by the clamper holder holding portion. and, cross section provided with a substantially concave shape of the clamping plate, and longitudinally except for the central portion of the clamper holder of the clamping holder is provided, provided the plate groove the clamping plate is disposed, the clamp One end of the plate is inserted into the plate through a support portion provided in the plate groove. Rotatably supported in a direction to press the bumpers vertically to the lower direction, with the biasing force for pressing the clamper is applied to the other end,
The other end of the clamp plate is biased by a tension coil spring in an oblique direction on the side where the component force is generated with respect to the clamp direction, and one outer surface of the clamp plate having a substantially concave shape and the plate groove A disc clamping mechanism characterized in that a component force of the urging force is generated in a direction in which the inner side surface always abuts.

  The other end of the clamp plate is biased by a tension coil spring in an oblique direction on the side where the component force is generated with respect to the clamp direction.

  According to the present invention, it is possible to provide a disk clamp mechanism that can fundamentally solve the problems of noise and vibration that occur when a disk is chucked or unchucked with a simple configuration.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a disc clamping mechanism according to Embodiment 1 of the present invention, and is a perspective view by line drawing. FIG. 2A shows the whole, and FIG. 2B shows the clamper part. In the figure, the hidden lines are also seen through. In this disk clamp mechanism, a substantially long plate-like clamper holder 2 is installed on the upper side of a substantially rectangular frame-shaped main chassis 1 in the left-right direction, and a substantially disk-like clamper 3 rotates in the center thereof. It is provided freely.

  The clamper 3 is pressed at the center of the upper surface by the lower surface of the clamp plate 4 arranged in parallel on the clamper holder 2. The clamp plate 4 is a frame material having a substantially concave cross section. The clamp plate 4 is pivotable up and down around a support end 4a that is one end (right end) of the clamp plate 4 and the other end (left end). The urging end 4 b is urged downward by the spring 5. Accordingly, when the clamper 3 is pressed at the center of the upper surface by the center of the lower surface of the clamp plate 4, the clamper 3 is given a clamping force while being rotatable.

  With this configuration, since the conventional magnet can be eliminated, it is possible to prevent noise and vibration when the disk is chucked or unchucked. Further, in this embodiment, as shown in FIG. 4B, the urging end 4b of the clamp plate 4 is urged by the spring 5 in an obliquely downward rearward direction. Details will be described later. The main chassis 1 is fixed to a disk device main body (not shown).

  2A and 2B are views showing the structure of an initial main chassis related to the disc clamping mechanism of the present invention. FIG. 2A is a plan view, FIG. 2B is a left side view, and FIG. It is an enlarged view. FIG. 3 is a diagram showing the configuration of the main chassis of this embodiment relating to the disc clamping mechanism of the present invention. FIG. 3 (a) is a plan view, FIG. 3 (b) is a left side view, and FIG. 3 (c). These are the A section enlarged views.

  In each figure, a clamper holder 2 erected on the upper side of the main chassis 1 in the left-right direction is provided with a substantially annular clamper holding portion 2a at the center thereof, and further in parallel with the longitudinal direction of the plate. A groove 2b is provided along the center line over the entire length except for the central portion. Here, after the clamper 3 is rotatably arranged in the clamper holding portion 2a, the clamp plate 4 is arranged in the plate groove 2b.

  The support end 4a of the clamp plate 4 is rotatably supported by the support portion 2ba provided at one end (right end) of the plate groove 2b. Further, the urging end 4b of the clamp plate 4 is received at the receiving portion 2bb provided at the other end (left end) of the plate groove 2b. Further, a locking claw 1a is provided on the left side surface of the main chassis 1 below the receiving portion 2bb. Between the biasing end 4b and the locking claw 1a, for example, the spring 5 which is a tension coil spring is provided. And the clamp plate 4 is urged downward.

  With this configuration, as described above, the clamper 3 is pressed at the center of the upper surface by the center of the lower surface of the clamp plate 4. When the disc is clamped, the clamper 3 is lifted by a turntable (not shown), the clamp plate 4 is further pushed up by the clamper 3, and the spring 5 is extended. For this reason, an appropriate urging force is applied to the clamp plate 4, and consequently an appropriate clamping force is applied to the clamper 3. In this state, vibration due to the rotation of the disk is absorbed by the clamp plate 4 and the spring 5.

  However, in the initial configuration shown in FIG. 2, since the locking claw 1a is provided immediately below the receiving portion 2bb, the urging end 4b of the clamp plate 4 is urged accurately downward, that is, in the clamping direction. A gap was generated between both outer side surfaces of the clamp plate 4 and both inner side surfaces of the plate groove 2b. At this time, when the clamp plate 4 vibrates in the front-rear direction of the main chassis 1 due to the rotation of the disk, the clamp plate 4 interferes with the plate groove 2b, and abnormal noise is generated.

  In this case, the clamp plate 4 must be raised and lowered during clamping and unclamping, and thus it is impossible to completely eliminate the gap as described above. Therefore, in the configuration of the present embodiment shown in FIG. 3, the locking claw 1a is arranged slightly shifted to the rear side of the main chassis 1 from directly below the receiving portion 2bb, and the urging end 4b of the clamp plate 4 is inclined rearward and downward. Thus, the outer rear surface of the clamp plate 4 and the inner rear surface of the plate groove 2b are always in contact with each other, and side pressure is applied to the clamp plate 4 to prevent the generation of abnormal noise.

  FIG. 4 is a diagram for schematically explaining again the configuration for preventing the generation of the above-mentioned abnormal noise. FIG. 4A is a diagram showing the clamp plate biasing state in the initial configuration, FIG. ) Is a diagram showing a clamp plate biasing state in the configuration of the present embodiment. In the initial configuration shown in FIG. 5A, the locking claw 1a is provided on the center line directly below the receiving portion 2bb of the plate groove 2b. When the spring 5 which is a tension coil spring is engaged with the pawl 1a, the biasing end 4b of the clamp plate 4 is accurately biased downward.

  For this reason, gaps t1 and t2 are generated between both outer side surfaces of the clamp plate 4 and both inner side surfaces of the plate groove 2b. At this time, when the clamp plate 4 vibrates in the front-rear direction (the left-right direction in the drawing) of the main chassis 1 by the rotation of the disk placed on the turntable, the outer surface of the clamp plate 4 becomes the inner surface of the plate groove 2b. There was an abnormal noise. In this case, since the clamp plate 4 must be lifted and lowered during clamping and unclamping, it is impossible to make the gaps t1 and t2 zero.

  Therefore, in the configuration of the present embodiment shown in FIG. 4B, a predetermined distance is placed on the rear side (left side in the drawing) of the main chassis 1 slightly from above the center line immediately below the receiving portion 2bb of the plate groove 2b. The locking claw 1a is arranged with a shift of l. Then, a spring 5 as a tension coil spring is engaged between the urging end 4b of the clamp plate 4 and the locking claw 1a so that the urging end 4b of the clamp plate 4 is urged diagonally downward. I have to.

  As a result, a component force for urging the clamp plate 4 rearward is generated, so that the outer rear surface of the clamp plate 4 and the inner rear surface of the plate groove 2b are always in contact with each other, so that collision is eliminated and a lateral pressure is applied to the clamp plate 4. Thus, the generation of abnormal noise is prevented. On the other hand, a gap t is formed between the outer front surface of the clamp plate 4 and the inner front surface of the plate groove 2b. The direction in which the locking claw 1a is displaced is opposite to the front side of the main chassis 1 (right side in the figure), and the urging end 4b of the clamp plate 4 is urged diagonally downward in the front direction. Also good.

The figure which shows the disc clamp mechanism which concerns on Example 1 of this invention. The figure which shows the structure of the original main chassis. The figure which shows the structure of the main chassis of a present Example. The figure which illustrates typically the structure which prevents generation | occurrence | production of unusual noise.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main chassis 1a Locking claw 2 Clamper holder 2a Clamper holding part 2b Plate groove 2ba Support part 2bb Receiving part 3 Clamper 4 Clamp plate 4a Support end 4b Energizing end 5 Spring

Claims (2)

In a disc clamping mechanism in which a disc is clamped between a clamper and a turntable so that recording or reproduction is performed on the disc.
A clamper holder constructed over the left and right direction of the main chassis and having a clamper holding portion at the center thereof;
A clamping force is provided by pressing a central portion of the clamper that is disposed in the longitudinal direction of the clamper holder and is held by the clamper holder holding portion, and a clamp plate having a substantially concave cross section is provided.
Longitudinally except a central portion of the clamper holder of the clamping holder is provided, it provided the plate groove the clamping plate is arranged,
The clamp plate is supported so that one end of the clamp plate can be pivoted up and down with the direction in which the clamper is pressed down through a support portion provided in the plate groove, and the other end is attached to press the clamper. As power is added,
The other end of the clamp plate is biased by a tension coil spring in an oblique direction on the side where the component force is generated with respect to the clamp direction,
2. A disk clamping mechanism according to claim 1, wherein a component force of the urging force is generated in a direction in which one outer surface of the clamp plate having a substantially concave cross section and an inner surface of the plate groove always come into contact with each other. In a disc clamping mechanism in which a disc is clamped between a clamper and a turntable so that recording or reproduction is performed on the disc.
A clamper holder constructed over the left and right direction of the main chassis and having a clamper holding portion at the center thereof;
A clamping force is provided by pressing a central portion of the clamper that is disposed in the longitudinal direction of the clamper holder and is held by the clamper holder holding portion, and a clamp plate having a substantially concave cross section is provided.
Longitudinally except a central portion of the clamper holder of the clamping holder is provided, it provided the plate groove the clamping plate is arranged,
The clamp plate is supported so that one end of the clamp plate can be pivoted up and down with the direction in which the clamper is pressed down through a support portion provided in the plate groove, and the other end is attached to press the clamper. As power is added,
2. A disk clamping mechanism according to claim 1, wherein a component force of the urging force is generated in a direction in which one outer surface of the clamp plate having a substantially concave cross section and an inner surface of the plate groove always come into contact with each other.

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