JP2006185528A - Disk clamping mechanism for disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk clamping mechanism including a clamper driving mechanism for increasing a clamping force when a disk is rotated at a high speed, and capable of thinning a device. <P>SOLUTION: A turntable 5 is provided with three or more sliders 8, 10, ... slidably supported at equal intervals in a circumferential direction around a rotary axis, pawls 7a, 9a, ... disposed in the sliders, springs for pressing the sliders in a sliding direction where the sliders are slidably supported, and the same rotational direction with respect to a circle around the rotary shaft 15 or the tangential direction of the same rotation, a driving mechanism 12 for moving at least one of the sliders in the sliding direction where the sliders are slidably supported against the elastic forces of the springs, and an interlocking mechanism for interlocking the movement of the slider by the driving mechanism 12 with the other slider. Each pawl is pressed into contact with the center hole of a disk 16 mounted on the turntable 5 in an outer peripheral direction and a turntable direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk clamp mechanism of a disk device.

  Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 2002-319216, as a disc clamping mechanism of a disc device such as a CD player, a disc placed on a turntable is turned into a turntable by a clamper held by a clamp arm. What is in pressure contact is known.

  In such a disc clamp mechanism, since the clamper and its drive mechanism are arranged above the disc, the apparatus cannot be made thin. In addition, when the disk rotation speed increases, the clamping force must be increased in order to cope with the gyro effect, but the clamping force cannot be increased as the disk rotation speed increases.

  In the disc clamping mechanism disclosed in Japanese Patent Laid-Open No. 8-102114, a plurality of L-shaped arms arranged inside the center hole of the disc placed on the turntable are pressed against the center hole of the disc by a spring. It is configured as follows.

  Then, when clamping the disk, the upper inclined portion of the arm is pushed by the edge of the disk center hole to rotate the arm against the elasticity of the spring, and the disk is placed on the disk mounting surface of the turntable. It is the structure pushed in until it contacts.

  In such a configuration, it is easy to perform the clamping operation with a human hand. However, in the case of auto loading, the operation is not reliably performed only by placing the disk on the turntable, and the disk is not mounted on the turntable. It is necessary to arrange a mechanism for pushing in until it comes into contact with the disk mounting surface, so that the apparatus cannot be configured to be thin.

Further, in order to cope with the gyro effect, the centrifugal force of the arm increases the clamping force. However, the arm is a small component disposed inside the center hole of the disk, has a small mass, and has a sufficient clamping force. I could not get power.
JP 2002-319216 A, paragraph 0013, FIG. JP-A-8-102114, paragraphs 0009 to 0011

  The present invention has been made in view of the above points, and an object of the present invention is to reduce the thickness of the apparatus by disposing a clamper driving mechanism below the disk placed on the turntable. It is another object of the present invention to provide a disk clamping mechanism for a disk device that increases a clamping force when the disk is rotated at a high speed.

  The disk clamping mechanism of the disk device according to the present invention includes three or more sliders supported on a turntable fixed to a rotating shaft of a disk motor so as to be slidable at equal intervals in the circumferential direction around the rotating shaft. The claw provided on the slider and the slider are slidably supported in the sliding direction and urged in the same rotational direction or the same tangential direction with respect to a circle centering on the rotational axis. Each spring, a drive mechanism for moving at least one of the sliders in the sliding direction supported slidably against the elasticity of the spring, and the movement of the slider by the drive mechanism to another slider Provided with an interlocking mechanism that interlocks with movement in the same rotational direction or the same tangential direction with respect to the circumferential direction, and each slider is moved by the elasticity of the spring. The one in which the pawl is configured so as to press the outer circumference direction and the turntable direction with respect to the center hole of the disk placed on the turntable.

  In the disk clamp mechanism, the interlocking mechanism is formed by a gear rotatably supported around the rotation shaft and a rack provided on each slider and meshing with the gear.

  Further, in the disk clamp mechanism, the interlocking mechanism is formed by a rotation member that is rotatably supported around the rotation axis, and a groove that is provided on each slider and is fitted with a protrusion provided on the rotation member. It is what has been.

  Further, in the disk clamp mechanism, the slider includes four sliders, each having a contact plane that forms an edge of each of the four sliders and forms an apex angle of 90 ° with each other. The above interlocking is performed.

  Further, in each of the disk clamp mechanisms, the drive mechanism is constituted by a rotating lever disposed on the lower side of the disk mounting surface.

  According to the disk clamp mechanism of the disk apparatus of the present invention, the clamper drive mechanism can be arranged below the disk placed on the turntable, so that the apparatus can be made thin.

  Further, the loading of the disk only requires the operation of transferring the disk onto the turntable and placing it on the turntable, and the mechanism becomes simple.

  Furthermore, since the centrifugal force of the slider acts as a disc clamping force, the clamping force increases when the disc is rotated at a high speed, and the gyro effect can be dealt with.

  The best mode for carrying out the present invention will be described below with reference to examples.

  1 is an exploded perspective view showing a disk clamp mechanism of a disk apparatus according to Embodiment 1 of the present invention. 1 is a base, and is fixed to the rotating shaft 15 of the disk motor shown in FIG. The base 1 is provided with four outer guides 1a and four inner guides 1b at regular intervals in the circumferential direction.

  A screw hole 1c is formed in the outer guide 1a, and a spring hook 1d is provided in the inner guide 1b. A boss 1e for fastening the head 4 with a screw inserted through the hole 4b of the bed 4 is formed at the center of the base 1, and the boss 1e has holes 1f, 1f... For positioning the head 4. Is provided.

  Although the sliders 7, 8, 9 and 10 have the same shape, the same numerals are assigned to the respective slider portions to indicate the configuration of each slider. In the figure, the slider portions are not all denoted by reference numerals, but by making them correspond to the reference numerals appended to the sliders 7, the configurations of the sliders 8 to 10 are clarified.

  The sliders 7, 8, 9 and 10 are placed on the base 1 in a state where the inner guides 1b of the base 1 are inserted into the long holes 7b, 8b, 9b and 10b and are sandwiched between the inner guide 1b and the outer guide 1a. The Then, the upward movement is restricted by the cover 2 that is fastened to the base 1 by screws 6, 6 that are inserted into the holes 2a, 2a,. The base 1 and the cover 2 are slidably supported.

  The contact planes 7d and 7e of the slider 7 form an apex angle of 90 °, and are in contact with the contact plane 8e of the slider 8 and the contact plane 10d of the slider 10, respectively. The abutting planes of the other sliders are also abutting in the same manner, and these abutting planes slide if the abutting state is maintained when the sliders 7, 8, 9 and 10 slide.

  When the sliders 7, 8, 9 and 10 slide, the claws 7a, 8a, 9a and 10a move in the grooves 4a, 4a. A tension coil spring 11 is hung between the spring hook 7c of the slider 7 and the spring hook 1d of the outer guide 1a as shown in FIG. 3, and the claw 7a of the slider 7 moves radially outward from the rotary shaft 15. Thus, the slider 7 is biased. The other sliders 8, 9 and 10 are similarly urged by the tension coil spring 11.

  A ring-shaped friction sheet 3 having a large friction coefficient is attached to the upper surface of the cover 2. As shown in FIG. 4, the base 1, the cover 2, the friction sheet 3 and the head 4 integrated as described above constitute a turntable 5 on which a disk 16 is placed. The head 4 has a positioning action when the disk 16 is placed on the turntable 5.

  As shown in FIGS. 2 to 3, a rotating lever 12 is arranged outside the sliders 7, 8, 9 and 10, and the rotating lever 12 is moved around the hole 12a by a driving mechanism (not shown). And the position shown in FIG. The distal end portion of the rotating lever 12 is formed on a substantially circular arc, and abuts against the outer edges of the sliders 7, 8, 9 and 10 within a range of at least 90 °. That is, at least one slider is driven by the rotating lever 12 regardless of the rotational position of the turntable 5.

  The operation of the disk clamp mechanism configured as described above will be described with reference to FIGS. 2 to 4 show the disc unclamped state, and FIGS. 5 to 7 show the disc clamped state. However, FIGS. 3 and 6 show a state where the cover 2, the friction sheet 3 and the head 4 are removed.

  2 to 4 show that the rotating lever 12 is rotated clockwise in the disk unclamped state, and the rotating lever 12 pushes the edge of the slider 7 to pull the slider 7 against the elastic force of the coil spring 11. 3 in the left direction.

  When the slider 7 moves to the left, the contact plane 7e of the slider 7 applies a force in the vertical direction (P direction in the figure) to the contact plane 10d of the slider 10. The force in the P direction can be divided into a component force in the sliding direction of the slider 10 and a component force in a direction perpendicular to the sliding direction. The component force in the direction perpendicular to the sliding direction is canceled by the reaction force of the outer guide 1a, and the component force in the sliding direction moves the slider 10 upward in FIG. 3 against the elasticity of the tension coil spring 11. Similarly, the slider 9 is moved rightward and the slider 8 is moved downward.

  By moving the sliders 7 to 10 in this way, the claws 7 a to 10 a are moved in the direction of the rotary shaft 15. Then, the disc 12 transferred to the upper side of the turntable 5 can be placed on the turntable 5 without being obstructed by the claws 7a to 10a as shown in FIG. In this disc unclamped state, the disc 12 can be unloaded without being blocked by the claws 7a to 10a.

  5 to 7, the rotating lever 12 is rotated counterclockwise in the disc clamp state, and the rotating lever 12 is separated from the edge of the slider 7. Then, the slider 7 is moved by the elasticity of the tension coil spring 11, and the claws 7a to 10a are pressed against the center hole of the disk 12 as shown in FIG. Since the contact portions of the claws 7a to 10a are inclined, the disk 12 is pushed downward and pressed against the friction sheet 3 to be in a disk clamp state.

  In the disc clamp state, the claws 7a to 10a are pressed against the center hole of the disc 12, and the disc 12 is pressed against the friction sheet 3 so that the disc 12 is held by the turntable 5 and rotated integrally with the turntable 5. Become.

  When the rotational speed of the turntable 5 increases, the centrifugal force generated in the sliders 7 to 10 acts so as to be added to the elasticity of the tension coil spring 11, so that the force for holding the disk 12 of the turntable 5 increases. It can cope with the gyro effect.

  FIG. 8 is a plan view showing a part of members of a disk clamp mechanism of a disk apparatus according to Embodiment 2 of the present invention. In the second embodiment, members having the same functions as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

  In this example, the gear 13 is rotatably supported by the boss 1e of the first embodiment, and the racks 7f, 8f, 9f, and 10f provided on the sliders 7, 8, 9 and 10 mesh with the gear 13, respectively. . Other configurations are the same as those in the first embodiment.

  In this example, since the sliders 7, 8, 9 and 10 are interlocked by the gear 13, the locking due to the frictional force is surely prevented as compared to the case where the sliders are in contact with each other and only by sliding. The sliders 7, 8, 9 and 10 move smoothly.

  FIG. 9 is a plan view showing a part of members of a disk clamp mechanism of a disk apparatus according to Embodiment 3 of the present invention. In the third embodiment, members having functions similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and detailed description thereof is omitted.

  In this example, the rotating member 14 is rotatably supported by the boss 1e of the first embodiment, and the grooves 7g, 8g, 9g, and 10g provided in the sliders 7, 8, 9 and 10 are the rotating member 14 respectively. Is engaged with the projection 14a. Other configurations are the same as those in the first embodiment.

  In this example, since the sliders 7, 8, 9 and 10 are interlocked by the rotating member 14, the locking by the frictional force is surely prevented as compared with the case where the sliders are in contact with each other and only in contact with each other. As a result, the sliders 7, 8, 9 and 10 move smoothly.

  The embodiment is configured as described above, but the invention is not limited to this. For example, when the sliders are prevented from being locked due to friction as in the second or third embodiment, the present invention includes, for example, three sliders. It is also possible to constitute a disc clamping mechanism of the disc device.

  Further, the number of rotating arms 12 constituting the driving mechanism is not limited to one, but two, for example, may be used.

It is a disassembled perspective view which shows the disc clamp mechanism of the disc apparatus which is Example 1 of this invention. It is a perspective view which shows the disc unclamped state in the disc clamp mechanism. It is a top view which shows the disc unclamped state in the disc clamp mechanism except for some members. It is sectional drawing which shows the disk clamp mechanism in the AA cross section in FIG. It is a perspective view which shows the disc clamp state in the disc clamp mechanism. It is a top view which shows the disc clamp state in the disc clamp mechanism except for some members. It is sectional drawing which shows the disk clamp mechanism in the BB cross section in FIG. It is a top view which shows the disk clamp state of the disk clamp mechanism of the disk apparatus which is Example 2 of this invention except for some members. It is a top view which shows the disk clamp state of the disk clamp mechanism of the disk apparatus which is Example 3 of this invention except for some members.

Explanation of symbols

1 base, 1a outer guide, 1b inner guide, 1c screw hole 1d spring hook 1e boss, 1f hole 2 cover, 2a hole 3 friction sheet 4 head, 4a groove, 4b hole 5 turntable 6 screw 7 slider, 7a claw, 7b Slotted hole, 7c Spring hook, 7d, 7e Contact plane,
7f rack, 7g groove 8 slider, 8a claw, 8b oblong hole, 8c spring hook, 8d, 8e abutment plane 8f rack, 8g groove 9 slider, 9a claw, 9b oblong hole, 9c spring hook, 9d, 9e abutment plane 9f rack, 9g groove 10 slider, 10a claw, 10b long hole, 10c spring hook 10d, 10e contact plane 10f rack, 10g groove 11 tension coil spring 12 rotating lever, 12a hole 13 gear 14 rotating member, 14a protrusion 15 Rotating shaft 16 disc

Claims (5)

Three or more sliders that are slidably supported at equal intervals in the circumferential direction around the rotation shaft, on the turntable fixed to the rotation shaft of the disk motor, the claws provided on the slider, Each spring is slidably supported in the sliding direction and urged in the same rotational direction or in the same tangential direction with respect to a circle centered on the rotational axis, and at least one of the sliders. A drive mechanism for moving the slider against the elastic force of the spring in a sliding direction supported slidably, and the movement of the slider by the drive mechanism to the other slider in the same rotational direction or the same as the circumferential direction An interlocking mechanism that interlocks with the movement of the surrounding tangential direction, and each claw is placed on the turntable when the slider is moved by the elasticity of the spring. Disc clamp mechanism configured disk apparatus in pressure-contact with the outer circumference direction and the turntable direction with respect to the center hole of the click. 2. The disk clamping mechanism of a disk apparatus according to claim 1, wherein the interlocking mechanism is formed by a gear rotatably supported around the rotation shaft and a rack provided on each slider and meshing with the gear. 2. The disk according to claim 1, wherein the interlocking mechanism is formed by a rotation member that is rotatably supported around the rotation axis, and a groove that is provided on each slider and engages with a protrusion provided on the rotation member. The disc clamp mechanism of the device. The slider includes four sliders, each having a contact plane that forms an edge of each of the four sliders and forms an apex angle of 90 ° with each other, and the interlocking is performed by pressing and sliding between the contact planes. 1 is a disk clamping mechanism of a disk device; The disk drive mechanism according to any one of claims 1 to 4, wherein the drive mechanism is constituted by a rotating lever disposed on the lower side of the disk mounting surface.

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