JP2004296015A - Disc chucking mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a feeling of chucking while increasing disk slip torque and disk pulling-out force. <P>SOLUTION: A disk holder 20 is fixed to the boss 6a of a rotor yoke 6 having the rotary shaft 10 of a spindle motor fitted thereto, catches 13 are radially arranged at predetermined intervals on the peripheral part of the disk holder 20 so as to be pressed outside by a spring 14, and a disk is held by the catches 13 when the disk is fixed to the disk holder 20. Each catch 13 has a slope 13a inclined toward the tip, and a pressing support 30 is positioned so as to come in contact with the slope 13a while it is energized to outward. When the catch 13 is depressed, the pressing support 30 abuts on the slope 13a. An inward force is applied to the catch 13 by the slope 13a, and the catch is pushed in even when the spring force of the coil spring 14 is strong. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a disk chucking mechanism, and more particularly to a disk chucking mechanism for holding a disk rotated by a spindle motor.
[0002]
[Prior art]
A conventional disk chucking mechanism will be described with reference to FIG.
[0003]
6 and 7, reference numeral 1 denotes a spindle motor, on which a circuit board 3 is disposed on the upper surface of a frame 2 and a bearing housing 4 is erected in the center, and a bearing 5 is fitted to the bearing housing 4. Have been.
[0004]
As shown in FIG. 7, the rotor yoke 6 of the spindle motor 1 is formed in a shallow inverted concave shape, and a cylindrical boss 6a is erected at the center. An annular rotor magnet 7 is fitted on the inner surface of the outer periphery of the rotor yoke 6, and coils 9, which are respectively wound around cores 8, 8. 9 are provided. When a drive current is applied to the coils 9, 9,... Formed on the circuit board 3, a magnetic field is generated around the coils, and this acts on the rotor magnet 7, whereby the spindle motor 1 is driven and the disk holder is driven. The disk 11 and the disk fitted to the disk holder 11 rotate clockwise.
[0005]
Therefore, a rotating shaft 10 of the spindle motor 1 is rotatably mounted on the bearing 5, and the rotating shaft 10 is fitted into a hole 6 b of a boss portion 6 a protruding from the rotor yoke 6. The rotor yoke 6 and the rotating shaft 10 are configured to be integrally rotatable.
[0006]
Further, a fitting hole 12 formed in the center of the disk holder 11 is fitted to the outer peripheral surface of the boss 6a of the rotor yoke 6. As shown in FIG. 9, the disk holder 11 has the fitting hole 12 formed at the center thereof and a cylindrical hole wall 12a forming the fitting hole 12 protruding downward. The fitting hole 12 can be fitted into the boss portion 6a of the sixth fitting.
[0007]
Further, the disk holder 11 is formed in a substantially hat shape except for the hole wall portion 12a, and is located at a vertex position of a substantially equilateral triangle as shown in FIG. Excision holes 11b, 11b, 11b are formed except for a peripheral portion of a flange portion 11a formed so as to surround a lower end portion of the disk holder 11, and the flange is formed at a center of each of the incisions 11b, 11b, 11b. The support pieces 11c, 11c, 11c are protruded inward from the portion 11a, and are protruding from the substantially central portion of the outer surface of the hole wall 12a at a position facing the support pieces 11c, 11c, 11c. 12b, 12b, 12b are protruded, and coil springs 14, 14, 14 are provided between the protruding portions 12b, 12b, 12b and the claws 13, 13, 13 disposed at the cutout holes 11b, 11b, 11b. Via 14 Then, the claws 13, 13, 13 are urged outward by the coil springs 14, 14, 14, respectively, and a stopper (see FIG. (Not shown). In the figure, reference numeral 15 denotes an open hole provided on the upper surface of the protrusions 12b, 12b, 12b.
[0008]
[Problems to be solved by the invention]
In the above conventional example, the claw portions 13, 13, 13 urged outward by the coil springs 14, 14, 14 around the peripheral portion of the disk holder 11 are fitted to the hole wall portion 12a of the disk holder 11. The disk 16 is configured to be held by the disk holder 11. That is, the disk 16 fitted into the hole wall portion 12a of the disk holder 11 moves in the pressing direction of the respective claw portions 13, 13, 13 arranged radially.
[0009]
At this time, if the spring pressure of the coil springs 14, 14, 14 is increased, the disk slip torque and the disk removal force can be increased. However, in this case, a considerable disc insertion force is required when chucking the disc, and there is a disadvantage that the feeling of chucking is deteriorated.
[0010]
The present invention has been proposed in view of such circumstances, and provides a disk chucking mechanism capable of improving the feeling of chucking while increasing the disk slip torque and the disk removing force. The purpose is to do.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, a disk chucking mechanism according to the present invention has a disk holder fitted to a boss of a rotor yoke fitted with a rotating shaft of a spindle motor, and a predetermined interval is provided at a periphery of the disk holder. A disk radially disposed by a spring and having a radially arranged spring, wherein the disk can be held by the disk when the disk is fitted to the disk holder; It has a holding mechanism, the claw portion has an inclined surface inclined toward the tip, and a pressing support portion is provided so as to contact the inclined surface when urged outward. It is characterized by the following.
[0012]
In the disk chucking mechanism of the present invention, the disk fitted into the hole wall of the disk holder is held by the disk holder by the claw urged outward by the coil spring. Here, when the disc is mounted, the claw portion is pushed down, and the inclined surface inclined toward the tip hits the pressing support portion. Here, since the pressing support portion abuts on the inclined surface, an inward force is applied to the claw portion by the inclined surface, and the claw portion is quickly pressed against the spring force of the coil spring. Therefore, even if the spring pressure of the coil spring is increased, the disc can be chucked with a small insertion force, and the feeling of chucking is improved.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a disk chucking mechanism to which the present invention is applied will be described in detail with reference to the drawings. For convenience of explanation, the same components as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted.
[0014]
Also in the disk chucking mechanism of the present embodiment, as shown in FIGS. 1 and 2, the rotor yoke 6 fitted to the upper end of the rotating shaft 10 of the spindle motor 1 and rotating integrally with the rotating shaft 10 is provided. A boss 6a provided with a hole 6b for fitting to the rotary shaft 10 is provided at the center thereof, and a fitting hole formed in the center of the disk holder 20 on the outer peripheral side surface of the boss 6a. The disc holder 20 is fitted so that the disc holder 20 can be integrally rotated in synchronization with the rotation of the rotating shaft 10.
[0015]
As shown in FIGS. 4 (a) and 4 (b), the disc holder 20 has the fitting hole 21 formed in the center thereof, and a cylindrical hole wall forming the fitting hole 21. A portion 21a is provided so as to project downward, so that the fitting hole 21 can be fitted into the boss portion 6a of the rotor yoke 6.
[0016]
Further, a lower portion of the outer surface of the hole wall portion 21a of the disc holder 20 and an intermediate portion of the claw portions 13, 13, 13 provided at the apexes of the equilateral triangle, and are located outward from the hole wall portion 21a. The arms 22, 22, 22 are protruded substantially horizontally, and tongues 23, 23, 23 are provided at the distal ends of the arms 22, 22, 22, respectively. The tip surfaces of the tongue pieces 23, 23, 23 all protrude slightly outward from the outer surface of the hole wall 21a, and are provided on the same circumference, and as shown in FIG. The tongue pieces 23, 23, 23 are configured to be capable of centering so that the disk 24 fitted on the outer surface of the wall 21a is not eccentric.
[0017]
That is, the disk 24 fitted to the hole wall 21a of the disk holder 20 is held on the disk holder 20 by the claws 13, 13, 13 pressed outward from the back by the urging of the coil springs 14, 14, 14. At the same time, the tongue pieces 23, 23, 23 align the center. Here, since these tongue pieces 23, 23, 23 are provided in the middle of the claw portions 13, 13, 13 and on the opposite side to the respective claw portions 13, 13, 13, the claw portions are provided. 13, 13, 13 and the tongue pieces 23, 23, 23 are alternately arranged radially from the center, so that the above-described holding and alignment of the disk 24 is performed extremely efficiently and smoothly. be able to.
[0018]
In such a disk chucking mechanism, as shown in FIG. 4 (a), the claw portions 13, 13, 13 each have an inclined surface 13a whose lower surface is inclined toward the front end, here a curved surface 13a. Is formed as an inclined surface 13a. A pressing support portion 30 is formed integrally with the flange portion 11a of the disc holder 20 so as to abut the inclined surface 13a.
[0019]
The pressing support portion 30 is formed as a protrusion that rises upward at an inner peripheral side position of the flange portion 11a, and the tip surface thereof is also formed with the inclined surface 30a according to the inclined surface 13a of the claw portion 13. Have been. The pressing support portion 30 is formed at a position just below the inner peripheral hole of the disk 24 mounted on the disk holder 20, and when the claw portion 13 is urged outward and protrudes, its inclination is It is formed at a position facing the surface 13a. When the pressing support portion 30 is formed on the inner peripheral side and comes into contact with the flat bottom surface of the claw portion 13, the claw portion 13 cannot be smoothly retracted.
[0020]
When such a structure is adopted, the claws 13, 13, 13 are pushed down when the disc is mounted, and the inclined surfaces 13a, 13a, 13a inclined toward the front end abut against the pressing support portions 30, 30, 30, respectively. Here, the pressing support portions 30, 30, 30 abut against the claw portions 13, 13, 13 so that the inclined surfaces 13a, 13a, 13a and the inclined surfaces 30a, 30a, 30a that are inclined with respect to each other come into contact with each other. The inward force is applied to the claw portions 13, 13, 13 by the surfaces 13a, 13a, 13a and the inclined surfaces 30a, 30a, 30a. It is pushed in against the spring force of the springs 14,14,14. Therefore, even if the spring pressure of the coil springs 14, 14, 14 is increased, the disc can be chucked with a small insertion force, and the feeling of chucking is improved.
[0021]
【The invention's effect】
As described in detail above, according to the disk chucking mechanism of the present invention, it is possible to improve the feeling of chucking while increasing the disk slip torque and the disk removal force.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a spindle motor provided on a circuit board.
FIG. 2 is a cross-sectional view taken along line AA of FIG.
FIG. 3 is a plan view of the disk holder.
FIG. 4A is a cross-sectional view of a disk holder, and FIG. 4B is a plan view of the disk holder with a claw portion and the like removed.
FIG. 5 is a schematic plan view showing a disc mounted state.
FIG. 6 shows a conventional example, and is a schematic plan view of a spindle motor provided on a circuit board.
FIG. 7 is a sectional view taken along line CC in FIG. 6;
FIG. 8 is a plan view of a conventional disk holder.
FIG. 9 is a sectional view taken along line DD of FIG. 8;
FIG. 10 is a schematic plan view showing a state where a disk is mounted on a conventional disk holder.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spindle motor 6 Rotor yoke 10 Rotary shaft 13 Claw portion 13a Inclined surface 14 Coil spring 20 Disk holder 21 Fitting hole 23 Tongue piece 24 Disk 30 Press support portion 30a Inclined surface

Claims (4)

A disk holder is fitted to the boss of the rotor yoke to which the rotation shaft of the spindle motor is fitted. Claws urged outward by a spring at predetermined intervals are provided on the peripheral edge of the disk holder in a radial manner. And a disk holding mechanism configured to be able to hold the disk by the claw portion when the disk is fitted to the disk holder,
The claw portion has an inclined surface inclined toward the tip, and is provided with a pressing support portion so as to be in contact with the inclined surface when urged outward. King mechanism. 2. The disk chucking mechanism according to claim 1, wherein a surface of the pressing support portion that contacts the claw portion is an inclined surface. 3. The disk chucking mechanism according to claim 2, wherein the inclined surface has a curved surface. 2. The disk chucking mechanism according to claim 1, wherein the pressing support is formed integrally with the disk holder.

Images