JP4254901B2 - Disc chucking mechanism - Google Patents

Description

  The present invention relates to a disk chucking mechanism that presses a disk against a disk table and rotates the disk integrally with the disk table.

  As a disk drive device provided with a disk chucking mechanism, the one shown in FIG. 19 is known. FIG. 19 is a perspective view showing a main part of a disk drive device 102 provided with the disk chucking mechanism 101. The disk chucking mechanism 101 includes a chucking plate 105 that presses the disk 104 onto the disk table 103 for chucking, and a chucking member 106 that supports the chucking plate 105 so as to be able to contact and separate from the disk 104. And a chucking plate attaching portion 107 for rotatably attaching the chucking plate 105 to the chucking member 106.

  The chucking member 106 is made of an aluminum alloy or the like. The chucking plate mounting portion 107 is formed separately from the chucking member 106 by a metal plate such as stainless steel (SUS).

  The chucking plate attaching portion 107 is attached to the chucking member 106 with a screw 108 after the chucking plate 105 is rotatably attached.

  By the way, the conventional disk chucking mechanism 101 and the disk drive apparatus 102 have the following problems.

  (1) Since the chucking member 106 and the chucking plate mounting portion 107 constituting the disc chucking mechanism 101 are formed separately, the number of parts increases and the part management cost also increases.

  (2) A process of attaching the chucking plate attaching part 107 to the chucking member 106 with the screw 108 is required, and the manufacturing process is complicated and the manufacturing cost is increased.

  (3) The chucking plate mounting portion 107 may fall off the chucking member 106 due to the looseness of the screw 108.

  The present invention solves the above-mentioned conventional problems by integrally forming the chucking member and the chucking plate mounting portion, and allowing the chucking plate to be easily and securely mounted to the chucking plate mounting portion. Is.

According to the first aspect of the present invention, there is provided a chucking plate that presses a disk onto a disk table, a chucking member that supports the chucking plate so as to be able to contact and separate from the disk, and the chucking plate that is integrated with the chucking member. A chucking plate mounting portion that is rotatably mounted, a bearing portion that rotatably supports a rotation center axis of the upper surface of the chucking plate on the chucking plate mounting portion, and the rotation center shaft on the bearing portion. An arm having a shaft introduction portion for introducing the shaft, and a flange portion provided at an upper end portion of the rotation center shaft when the rotation center shaft is introduced into the bearing portion. A holding piece to be inserted is integrally provided, and the chucking plate is attached to the chucking plate mounting portion. In the disk chucking mechanism stopper portion for preventing the rotation axis comes out of the bearing portion in a direction perpendicular to the axial direction of the central axis is provided integrally,
The rotation center shaft is divided in the axial direction so as to be easily reduced in diameter, and the chucking plate mounting portion is formed of an elastic material, and the chuck facing the stopper portion with the bearing portion interposed therebetween. The shaft introduction portion is formed by cutting off the tip of the king plate mounting portion, the width of the shaft introduction portion is smaller than the diameter of the rotation center shaft of the chucking plate, and the rotation center shaft is press-fitted The chucking plate is reduced in size by the elastic deformation caused by the shaft introduction portion and introduced into the bearing portion, and the rotation center shaft is elastically restored to the original diameter after being introduced into the bearing portion. Can be attached to the chucking member .

The rotation center shaft is divided in the axial direction so as to be easily reduced in diameter, and the chucking plate mounting portion is formed of an elastic material, and the shaft introduction portion is disposed on the opposite side of the stopper portion with the bearing portion interposed therebetween. And the width of the shaft introduction portion is smaller than the diameter of the rotation center shaft of the chucking plate. Therefore, when the rotation center shaft is inserted, the rotation center shaft is compressed and contracted by the shaft introduction portion. On the other hand, the shaft introduction portion is elastically deformed and expanded, so that the rotation center shaft can be smoothly introduced into the bearing portion.

  FIG. 1 is a perspective view showing a main part of a disk recording and / or reproducing apparatus having a disk chucking mechanism according to a reference example of the present invention, for example, a disk drive apparatus as a compact disk player. The disk drive device 1 includes a mechanical chassis 2 and an optical chassis 4 supported on the mechanical chassis 2 in a floating state via a buffer member 3 such as a silicon oil damper.

  The mechanical chassis 2 has a disk loading roller 5. The disk loading roller 5 is attached to the upper end of a roller support arm 6 that is rotatably attached to the mechanical chassis 2 at its lower end. The roller support arm 6 supports the disk loading roller 5 in a state where it is raised to the disk insertion position by a spring 7. The roller support arm 6 is pressed by a roller support arm 25 provided on a rotation member 21 for locking the optical chassis, which will be described later, and rotates against the spring force of the spring 7 so that the disk The loading roller 5 is lowered.

  The optical chassis 4 includes a recording and / or reproducing unit including a disk table 8 and an optical pickup 9. When the disc 10 is inserted between the disc loading roller 5 and a disc guide plate (not shown) disposed on the disc loading roller 5, the disc loading roller 5 rotates in the clockwise direction so that the disc 10 is moved to the disc table 8. Feed up to stop rotation. The rotating arm 6 is rotated downward to lower the disk loading roller 5 and place the disk 10 on the disk table 8. The disc 10 placed on the disc table 8 is pressed against the disc table 8 by the disc chucking mechanism 11 and chucked.

  The disk chucking mechanism 11 includes a chucking plate 12 that presses the disk 10 onto the disk table 8, a chucking member 13 that supports the chucking plate 12 so as to be able to come into contact with and separate from the disk 10, and the chucking. And a chucking plate mounting portion 14 for rotatably mounting the plate 12 to the chucking member 13. The chucking plate mounting portion 14 is formed integrally with the chucking member 13.

  FIG. 2 is an exploded perspective view of the disk chucking mechanism 11. The chucking plate 12 includes a plate main body portion 12a formed in a disk shape having substantially the same diameter as the disk table 8, and a cylindrical rotation center shaft 12b provided in the center on the upper surface of the plate main body portion 12a. And a large-diameter flange portion 12c provided at the upper end of the rotation center shaft 12b, and a hemispherical pressed portion 12d provided at the center of the upper surface of the flange portion 12c. The rotation center shaft 12b is divided in the axial direction so as to be easily reduced in diameter. The chucking plate 12 is made of plastic.

  The chucking member 13 includes an arm main body portion 13a provided with the chucking plate mounting portion 14 at a central portion in the length direction, and first and first ends provided at both end portions in the length direction of the arm main body portion 13a. 2 arms 13b and 13c.

  The first and second arms 13b and 13c have shafts 13d and 13e at one end.

  The chucking member 13 is rotatably attached to the optical chassis 4 by inserting the shafts 13 d and 13 e into a pair of bearing portions 4 a and 4 b provided on the optical chassis 4.

  The chucking member 13 is given a turning force in the direction of arrow A (downward) about the shafts 13d and 13e by a spring 15. The second arm 13c has an inclined pressed portion 16 at the end opposite to the shaft 13e, and a rotating member for optical chassis locking, the lower surface of which will be described later. The chucking member operating portion 26 provided at 21 is pressed and rotated about the shafts 13d and 13e against the spring force of the spring 15. The chucking member 13 is made of a metal such as an aluminum alloy.

  The chucking plate mounting portion 14 is an arm provided with a bearing portion 14a that rotatably supports the rotation center shaft 12b of the chucking plate 12 and a shaft introduction portion 14b that introduces the rotation center shaft 12b into the bearing portion 14a. 14c and the rotation center shaft 12b disposed above the arm 14c, when the bearing portion 14a is introduced, the flange portion 12c at the upper end of the rotation center shaft 12b is sandwiched between the arm 14c and the flange portion. And a holding piece 14d for holding the pressed portion 12d on the upper surface of 12c.

  As shown in FIG. 3A, the arm 14c and the holding piece 14d are formed on the outer side of a substantially V-shaped notch (slit) 14e constituting the bearing portion 14a and the shaft introduction portion 14b. And is formed inside. As shown in FIG. 3B, a step is formed between the arm 14c and the holding piece 14d by providing a bent portion 14f having a substantially right angle at the base portion of the arm 14c. .

  The holding piece 14d is provided with a stopper portion 14g for preventing the rotation center shaft 12b introduced into the bearing portion 14a from coming out of the shaft introducing portion 14b. The stopper portion 14g is formed by inclining and raising a rectangular tongue piece inside a substantially U-shaped cutout (slit) 14h in the holding piece 14d, and bending the tip thereof downward at a substantially right angle. It is formed by.

  Next, a method for attaching the chucking plate 12 to the chucking plate attaching portion 14 will be described. As shown in FIG. 4, the flange portion 12c of the chucking plate 12 is below the holding piece 14d, and the rotation center shaft 12b of the chucking plate 12 is lateral to the shaft introduction portion 14b of the arm 14c. Position.

  Then, if the chucking plate 12 is moved in the direction of arrow A, the rotation center shaft 12b is introduced into the bearing portion 14a via the shaft introduction portion 14b as shown in FIG. The flange portion 12c is inserted between the arm 14c and the holding piece 14d. Then, as shown in FIG. 6, the stopper portion 14g is bent downward to close the shaft introduction portion 14b, so that the chucking plate 12 has a bearing in a direction perpendicular to the axial direction of the rotation center shaft 12b. 12d in a hemispherical shape on the upper surface of the flange portion 12c, in a state where it is prevented from coming off from the shaft portion, that is, the shaft introduction portion 14b, so as to be able to rotate across the bearing portion 14a and the shaft introduction portion 14b. In the range of the gap G between the top portion of the base plate and the lower surface of the holding piece 14d, it is supported so as to be movable up and down. FIG. 7 is a plan view showing a state in which the rotation center shaft 12b shown in FIG. 6 is rotatably attached. In other words, the chucking plate 12 has a flange portion 12c interposed between the arm 14c and the holding piece 14d to restrict axial movement of the rotation center shaft 12b, and the rotation center shaft 12b and flange between the arm 14c and the stopper portion 14g. By interposing the part 12c, the movement in the direction orthogonal to the axial direction of the rotation center shaft 12b is restricted and does not fall off.

  8 to 10 show other reference examples of the disk chucking mechanism. In this reference example, the chucking member 13 is made of an elastic material such as stainless steel or phosphor bronze. The tip of the stopper portion 14g is bent at a substantially right angle upward. The stopper part 14g is arranged in a state where it is bent in advance at a position for closing the shaft introducing part 14b.

  And as shown in FIG. 8, the stopper part 14g can be elastically changed in the arrow X direction. Further, the chucking plate 12 is positioned so that the flange portion 12c is positioned below the holding piece 14d, and the rotation center shaft 12b of the chucking plate 12 is positioned on the side of the shaft introducing portion 14b of the arm 14c. If the king plate 12 is moved in the direction of arrow A, as shown in FIG. 9, the stopper portion 14g is pressed by the tip end portion of the flange portion 12c to escape in the direction to open the shaft introduction portion 14b. To do.

  Then, as shown in FIG. 10, when the rotation center shaft 12b is introduced into the bearing portion 14a and the pressing by the flange portion 12c is released, the stopper portion 14g has its own spring force. Thus, it automatically returns to its original position and closes the shaft introduction portion 14b, thereby preventing the chucking plate 12, that is, the rotation center shaft 12b from coming out.

  11 to 13 show the disk chucking mechanism of the present invention. In the disc chucking mechanism of the present invention, the shaft introducing portion 14 b is provided at the tip of the substantially triangular arm 14. The width WS of the shaft introduction portion 14b is formed smaller than the diameter D of the rotation center shaft 12b. Further, the aperture width WL of the bearing portion 14a is formed to be slightly larger than the diameter D of the rotation center shaft 12b. When the rotation center shaft 12b of the chucking plate 12 is forcibly inserted (press-fitted) from the shaft introduction portion 14b, the chucking plate 12 is made of plastic, so that the rotation center shaft 12b is also somewhat elastically deformed. When the rotation center shaft 12b is forcibly inserted (press-fitted) into the shaft introduction portion 14b, the diameter D of the rotation center shaft 12b is reduced to the width WS of the shaft introduction portion 14b and introduced into the bearing portion 14a. After that, it is elastically restored to its original diameter D, is prevented from coming out of the shaft introducing portion 14b, and is rotatably supported by the bearing portion 14a. Reference numeral 14i denotes a stopper portion for preventing the rotation center shaft 12b introduced into the bearing portion 14a from slipping out from the opposite side of the shaft introduction portion 14b of the bearing portion 14a. Other configurations are the same as those in the previous reference example, and thus redundant description is omitted. The operation of each part is the same as the reference example described in FIGS.

  As described above, when the disk 10 is inserted between the disk loading roller 5 and the disk guide plate (not shown) disposed above the disk drive device 1 having the disk chucking mechanism, The roller 5 rotates to feed the disk 10 onto the disk table 8. When the disk 10 is fed onto the disk table 8, a trigger lever 31 described later is pressed by the disk 10, and an optical chassis lock disposed below the optical chassis 4 and on the upper surface of the mechanical chassis 2. And the optical chassis 4 is unlocked by the optical chassis lock portion 24 provided on the rotary member 21, and the optical chassis 4 is brought into a floating state by the buffer member 3 such as the oil damper. At the same time, the disk loading roller 5 is lowered by the roller support arm operation unit 25 provided on the rotating member 21 to place the disk 10 on the disk table 8 and the disk 10 is moved to the disk chucking mechanism 11. Thus, the disk table 8 is chucked.

  14 is a plan view of the upper surface of the mechanical chassis 2 with the optical chassis 4 removed. A rotating member 21 is disposed on the upper surface of the mechanical chassis 2. The rotating member 21 is formed in a substantially arc shape. The rotating member 21 has a plurality of arc-shaped slide guide long hole grooves 22... 22, and the slide guide long hole grooves 22. ... Are inserted in the direction of the length of the long holes 22.

  The rotating member 21 includes three optical chassis lock portions 24... 24 that lock the optical chassis 4 against the shock absorber 3 and the mechanical chassis 2, and a roller support arm 6 to which the disk loading roller 5 is attached. A roller support arm operation unit 25 that rotates against the spring force of the spring 7 to lower the disk loading roller 5, and a lower surface of the pressed part 16 provided on the chucking member 13 of the disk chucking mechanism 11. A chucking member operating portion 26 is provided that presses and rotates the chucking member 13 in the vertical direction about the shafts 13d and 13e.

  And in the state which the said rotation member 21 rotated most clockwise, as shown in FIG.1 and FIG.15, the optical chassis lock | rock part 24 ... 24 provided in the said rotation member 21 is made to the said optical chassis 4 with it. The provided locked portion 4c... 4c is locked to the mechanical chassis 2 side, the roller support arm operation portion 25 presses the lower end portion 6a of the roller support arm 6, and the disc loading roller 5 is stopped at the disc insertion position. At the same time, the chucked member operating portion 26 presses the pressed portion 16 of the chucking member 13 to rotate the chucking member 13 upward, so that the chucking plate 12 and the disk table are rotated. A space in which the disk 10 can be inserted is formed between the two.

  In this state, when the disc 10 is inserted between the disc loading roller 5 and the disc guide plate, the disc loading roller 5 rotates and the disc 10 is fed above the disc table 8. Thus, the trigger lever 31 is pressed.

  As shown in FIG. 14, the trigger lever 31 includes a first lever 33 that is pivotally attached to the mechanical chassis 2 by a shaft 32 at a substantially central portion, and the pivot member that has a substantially central portion by a shaft 34. 21 is provided with a second lever 35 attached to be rotatable. When the disk 10 is fed above the disk table 8, a pin 36 provided at one end of the first lever 33 is pressed, and the first lever 33 rotates clockwise about the shaft 32. It rotates and presses the one end part 38 of the said 2nd lever 35 with the press part 37 of an other end part.

  The second lever 35 pressed against the one end 38 rotates about the shaft 34 counterclockwise against the spring force of the spring 39 acting on the tip thereof, as shown in FIG. The rack 40 provided on one side of the second lever 35 meshes with the pinion 41. When the pinion 41 rotates in the clockwise direction, the pinion 41 meshes with the rack 42 provided on the rotating member 21 via the rack 40 of the second lever 35, and the rotating member 21 is counteracted. Rotate clockwise.

  As shown in FIGS. 17 and 18, when the rotating member 21 is rotated in the most counterclockwise direction, the locked portions 4a to 4a of the optical chassis 4 by the optical chassis lock portions 24 to 24 are rotated. The lock is released, and the optical chassis 4 is supported in a floating state on the mechanical chassis 2 via the buffer member 3. Further, the roller support arm operation unit 25 presses the lower end portion 6a of the roller support arm 6 to rotate the roller support arm 6 against the spring force of the spring 7, and the disk loading roller 5 is lowered. Thus, the disc 10 is placed on the disc table 8, the pushing-up of the pressed portion 16 by the chucking member operating portion 26 is released, and the chucking member 13 is directed downward by the spring force of the spring 15. The disc 10 is pressed by the chucking plate 12 on the disc table 8 to chuck the disc.

The perspective view of the principal part of a recording and / or reproducing | regenerating apparatus. The disassembled perspective view of the disc chucking mechanism of a reference example. (A) And (B) is a perspective view which shows the manufacturing process of a chucking member. Sectional drawing which shows the assembly | attachment process of a chucking plate. Sectional drawing which shows the assembly | attachment process of a chucking plate. Sectional drawing which shows the assembly | attachment process of a chucking plate. The top view of the principal part of the state which assembled | attached the chucking plate. Sectional drawing which shows the assembly | attachment process of another reference example. Sectional drawing which shows the assembly | attachment process of another reference example. Sectional drawing which shows the assembly | attachment process of another reference example. The disassembled perspective view which shows the Example of this invention. The top view which shows the assembly | attachment process of the Example of this invention. The top view which shows the assembly | attachment process of the Example of this invention. The top view of the state which removed the optical chassis. Sectional drawing of the principal part of FIG. The top view which shows the effect | action of a trigger lever. The top view of the state which the rotation member moved to the lock release position. Sectional drawing of the principal part of the state which the rotation member moved to the lock release position. The perspective view of a prior art example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Recording and / or reproducing | regenerating apparatus, 8 ... Disc table, 10 ... Disc, 11 ... Disc chucking mechanism, 12 ... Chucking plate, 12b ... Rotation center axis, 12c ... Flange part, 13 ... Chucking member, 14 ... Chucking plate mounting portion, 14a ... bearing portion, 14b ... shaft introduction portion, 14c ... arm, 14d ... holding piece, 14g ... stopper portion.

Claims (1)

A chucking plate that presses the disc onto the disc table;
A chucking member that supports the chucking plate so as to be able to contact and separate from the disk;
A chucking plate mounting portion for rotatably mounting the chucking plate integrally with the chucking member;
An arm having a bearing portion that rotatably supports the center axis of rotation of the upper surface of the chucking plate at the chucking plate mounting portion, a shaft introduction portion that introduces the center axis of rotation to the bearing portion, and an upper portion of the arm When the rotation center shaft is introduced into the bearing portion, a holding piece for inserting a flange portion provided at the upper end portion of the rotation center shaft between the arm and the arm is provided integrally.
The chucking plate mounting portion is integrally provided with a stopper for preventing the chucking plate from coming out of the rotation center shaft from the bearing portion in a direction perpendicular to the axial direction of the rotation center shaft. In the king mechanism,
The rotation center shaft is divided in the axial direction so as to be easily reduced in diameter, and the chucking plate mounting portion is formed of an elastic material, and the chuck facing the stopper portion with the bearing portion interposed therebetween. The shaft introduction portion is formed by cutting off the tip of the king plate mounting portion, the width of the shaft introduction portion is smaller than the diameter of the rotation center shaft of the chucking plate, and the rotation center shaft is press-fitted The disk chucking is characterized in that the shaft is reduced in diameter to the width of the shaft introduction portion by elastic deformation due to and introduced into the bearing portion, and the rotation center shaft is elastically restored to the original diameter after being introduced into the bearing portion. mechanism.

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