KR0176575B1 - Disc clamping apparatus - Google Patents

Abstract

The present invention relates to a disc clamping device of a disc player.

The disc clamping apparatus of the disc player according to the present invention is configured such that the pressing member for pressing the disc together with the turntable is elastically biased to the turntable side by the spring member, so that the disc is reliably clamped so as to slide against the turntable when the disc is rotated. Not only can be prevented, it is also possible to effectively suppress the generation of noise during the clamping release.

Description

Disc clamping device for disc player

1 is a structural cross-sectional view of a disc player with a conventional disc clamping device.

2 and 3 are sectional views taken along line II-II of FIG. 1, in which FIG. 2 shows a state before the disk is clamped, and FIG. 3 shows a state in which the disk is clamped.

4 is a structural cross-sectional view of a disc player with a disc clamping device according to the present invention.

5 is an exploded perspective view of the main part of the disc player shown in FIG.

6 is a cross-sectional view taken along the line VI-VI of FIG.

7 and 8 are sectional views taken along line VII-VII of FIG. 4, where FIG. 7 shows a state before the disk is clamped, and FIG. 8 shows a state where the disk is clamped.

9 and 10 are views of the pressing member shown in FIG. 5 from the disc side, and FIG. 9 shows a state before the magnetic body is fixed, and FIG. 10 shows a state in which the magnetic body is fixed.

* Explanation of symbols for main parts of the drawings

2: deck 3: spindle motor

40: turntable 41: base portion

42: protrusion 48: magnet

50: disc 55: through hole

60 plate 70 pressing member

71: first projection 72: second projection

80: spring member 81: body

82: contact portion 82a: groove portion

83: elastic deformation portion 90: magnetic body

The present invention relates to a disc clamping device of a disc player, and more particularly, to an improved disc clamping device which can reliably clamp a disc and that noise is not generated when the disc is clamped and released.

For example, a compact disc player (CDP) that plays a compact disc, or a disc player that plays a disc, such as a compact disc ROM drive of a computer, is placed in a disc tray and transferred into the housing of the disc player. A disk clamping device is provided which presses and clamps both sides of the used disk.

The disc player with the disc clamping device is shown in FIG. 1 structurally. As shown in FIG. 1, a plate 6 is fixed to an upper portion of the disc player housing 1, and a deck 2 is rotatably pivoted around the hinge 2a inside the housing 1. It is installed.

The pressing member 7 is provided on the plate 6 so as to be able to flow a predetermined distance in a direction approaching and spaced apart from the disk 50 while facing the upper surface 51 of the disk 50. The pressing member 7 is moved in the direction approaching the disk 50 by its own weight.

The spindle motor 3 is fixed to the deck 2, and the turntable 4 for clamping the disk 50 together with the pressing member 7 is fixed to the output shaft of the spindle motor 3. The turntable 4 is provided with the base part 41 which faces the lower surface 52 of the disk 50, and the protrusion part 42a formed in the center of the base part 41. As shown in FIG. The protrusion 42a is fitted into the through hole 55 formed in the center portion of the disc 50 at the time of the upward rotation of the deck 2. On the other hand, as shown in FIG. 2, a cross-sectional view taken along the line II-II of the disc player shown in FIG. 1, the base portion 41 and the protrusion 42a of the turntable 4 are each separately manufactured and joined. A locking member 45 elastically biased toward the disk 50 by the compression coil spring 46 is provided between the base portion 41 and the protrusion 42a.

The base member 41 of the turntable 4 is attached with a friction member 44 having a large coefficient of friction such as rubber and the like, and an annular magnet 48 is fixed to the upper end of the protrusion 42a. A magnetic body 9 is attached to the pressing member 7 at a position facing the magnet 48 fixed to the turntable 4.

In the disc player having such a configuration, when the deck 2 is moved up and down after the disc 50 is transferred into the housing 1, the spindle motor 3 and the turntable 4 are raised together. In this process, the projection 42a of the turntable 4 is inserted into the through hole 55 formed in the center portion of the disk 50, and the locking member 45 is inserted into the through hole 55 of the disk and caught by the disk ( 50 is coaxial with the turntable 4. Then, as the turntable 4 continues to rise, the disk 50 that is caught by the locking member 45 is moved to the pressing member 7 side and brought into contact with the pressing member 7. At this time, the pressing member 7 is moved to the turntable 4 side by the attraction force between the magnet 48 fixed to the protrusion 42a and the magnetic body 9 fixed to the pressing member 7 to move the disk 50. It is pressed to the turntable 4 side. As described above, the disk 50 pressurized toward the turntable 4 lowers the locking member 45 and compresses the compression coil spring 46 while simultaneously compressing the compression coil spring 46 as shown in FIG. 3. Close to) Accordingly, the disk 50 is clamped by the pressing member 7 and the turntable 4 in a state in which both side surfaces 51 and 52 are pressed. The disk 50 clamped in this way is rotated together with the turntable 4 and the pressing member 7 when the spindle motor 3 rotates, and is informed by an optical pickup unit (not shown) installed in the deck 2. Will be read.

By the way, in the above-described conventional disk clamping device, the clamping force of the disk is determined by the magnetic force of the magnet fixed to the turntable. If the magnetic force is weak, the clamping is not reliably performed, and the disk slips on the turntable. This will occur. In the case of increasing the magnetic force of the magnet in order to prevent this, there is a problem that the release of the clamping is not made smoothly or a large noise occurs when the clamping release.

The present invention has been made to solve the above problems, it is possible to reliably clamp the disk to prevent the disk from slipping against the turntable during rotation of the turntable, it is possible to smoothly release the clamping operation of the disk Rather, it is an object of the present invention to provide a disc clamping device for a disc player that is improved to suppress generation of noise when the disc is unclamped.

In order to achieve the above object, a disc clamping device for a disc player according to the present invention,

A base portion facing one side of the disc transferred into the disc player housing and a protrusion fitted into a through hole formed in the center of the disc, the fixed portion being fixed to an output shaft of a spindle motor installed in the disc player housing to be accessible to the disc; A turntable;

A plate positioned to face the other side of the disc and fixed to a housing of the disc player;

A pressing member installed on the plate to allow a predetermined distance to the disk and to be spaced apart from the disk at a position facing the other side of the disk;

A spring member for elastically biasing the pressing member in a direction approaching the disk;

A magnet fixed to the tip of the protrusion of the turntable;

It is characterized in that it is provided with a magnetic body fixed at a position facing the magnet of the pressing member.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a structural cross-sectional view of a disc player with a clamping device according to the present invention, and FIG. 5 is an exploded perspective view of main portions of the disc player shown in FIG. 6 is a sectional view taken along the line VI-VI of the spring member shown in FIG. 5, and FIG. 7 is a sectional view taken along the line VII-VII of FIG.

Referring first to FIG. 4, the disc player has a deck 2 provided in the housing 10 in such a manner as to be capable of lifting and lowering about a hinge 2a, which has a housing 10. An optical pickup (not shown) is provided for reading information from the disk 50 transferred into the inside, and the spindle motor 3 is fixed. The plate 60 is fixed to the upper portion of the housing 10.

The turntable 40 is fixed to the output shaft 3a of the spindle motor 3 so that the turntable 40 is approached and spaced apart from the disk 50 at the time of lifting and lowering the deck 2. The turntable 40 is provided with the base part 41 which faces the lower surface 52 of the disk 50, and the protrusion part 42 formed in the center of the base part 41. As shown in FIG. The protrusion 42 is fitted into the through hole 55 formed in the center portion of the disc 50 at the time of the upward rotation of the deck 2.

As shown in FIG. 7, the base part 41 and the protrusion part 42 are separately manufactured and coupled to each other, and between the base part 41 and the protrusion part 42 are compressed by a compression coil spring 46. An elastic biased locking member 45 is provided to move to the 50) side. The base portion 41 of the turntable 40 is attached with a friction member 44 having a large coefficient of friction such as rubber, and the like, and an annular magnet 48 is fixed to the upper end of the protrusion 42. The magnetic member 90 is fixed to the pressing member 70 at a position facing the magnet 48. There are various ways to fix the magnetic body 90 to the pressing member 70. However, in the present embodiment, the magnetic body 90 is formed from the bottom surface of the pressing member 70 as shown in FIG. By being rotated by a predetermined angle after being fitted through), as shown in FIG. 10, it is fitted to the engaging projection 75 formed on the pressing member 70 to be caught and fixed. According to the fixing method as described above, the magnetic body 90 can be easily fixed to the pressing member 70 without providing a separate member such as an adhesive or a screw necessary for fixing.

As shown in FIG. 5, the plate 60 is fixed to the housing 10 by fitting the through hole 61 formed at the edge of the body to the engaging protrusion 11 formed in the housing 10. do. The pressing member 70 is inserted into the through hole 62 of the plate 60 so that the pressing member 70 can be elevated in a state facing the upper surface 51 of the disk 50, that is, the disk 50 can be approached and spaced apart from the disk 50. You lose. As described above, the pressing member 70 coupled to the plate 60 is elastically biased in a direction approaching the disk 50 by the spring member 80.

The spring member 80 is formed by pressing a metal member of a thin plate in a predetermined shape, as shown in FIGS. 5 to 7, the body portion 81, the contact portion 82, and the plurality of elastic deformation portions. (83) is provided.

The body portion 81 is fixed to the plate 60, so that the body portion 81 is fixed to the plate 60 in this way, the body portion 81 in the coupling hole of the plate 60 63 Coupling projections (85) fitted to each of the coupling) and the elastic piece 84 is provided in elastic contact with the bottom surface of the plate (60).

The contact portion 82 is positioned below the body portion 81, that is, at a position spaced apart from the body portion 81 toward the disk 50. The pressing member 70 is in contact with the contact portion 82, when the external force is applied to the pressing member 70 from below, the pressing member 70 and the contact portion 82 in contact with the pressing member 70 The predetermined distance can be increased while elastically deforming the elastic deformation part mentioned later.

The elastic deformation parts 83 are elastically deformable parts, and both ends thereof are fixed to the body part 81 and the contact part 82, respectively. The elastic deformation parts 83 each have a predetermined curvature. It is preferable to form a curve, in which case the elastic deformation can be made more easily.

On the other hand, in the center of the pressing member 70, on the support portion 77 located above the through hole 79 of the pressing member 70, the positioning first projection (protrusion toward the spring member 80 side ( 71 is formed, and the contact portion 82 of the spring member 80 is formed with a groove portion (82a) for receiving the first projection (71) of the pressing member (70). In addition, at the center of the pressing member 70, a positioning second projection 72 protruding toward the protrusion 42 of the turntable 40 is formed, and the pressing member 42 is formed at the protrusion 42 of the turntable 40. The accommodation part 40a which accommodates the 2nd protrusion 72 of 70 is formed. In the drawing, reference numeral 91 denotes a hole formed in the central portion of the magnetic body 90 so that the second protrusion 72 penetrates when the magnetic body 90 is fixed to the pressing member 70.

When the disc 2 is moved up and down about the hinge 2a after the disc 50 is transferred into the housing 10 of the disc player with the disc clamping device of this configuration, the spindle motor 3 and the turntable 40 ) Will rise together. In this process, the protrusion 42 of the turntable 40 is inserted into the through-hole 55 of the disk 50, and the locking member 45 is fitted into the through-hole 55 of the disk while the disk 50 is turned over. It is positioned coaxially with (40). Then, as the turntable 40 continues to rise, the disk 50 that is fitted to the locking member 45 is moved to the pressing member 70 side and comes into contact with the pressing member 70. At this time, by the attractive force of the magnet 48 fixed to the tip of the protrusion 42 of the turntable 40 and the magnetic body 90 fixed to the pressing member 70, the pressing member 70 is turned relative to the turntable 40 side. The disk 50 is pushed to the turntable 40 while being moved. Thus, the disk 50 pressed to the turntable 40 side lowers the catching member 45 and simultaneously compresses the compression coil spring 46 while the base portion 41 of the turntable 40 is shown. It is in close contact with the friction member 44 attached to the. Therefore, the disk 50 is clamped in a state where both sides are pressed by the pressing member 70 and the turntable 40. The clamped disk 50 is rotated together with the turntable 40 and the pressing member 70 when the spindle motor 3 rotates, and the information is read by the optical pickup unit installed in the deck 2. .

At this time, the pressing member 70, together with the magnetic force of the magnet 48 applied to the magnetic body 90, the disk 50 is fixed to the base portion 41 of the turntable by the elasticity of the spring member 80 It comes in close contact with the friction member 44. Therefore, even when the magnetic force is weak, the pressing member 70 can reliably adhere the disk 50 to the friction member 44 of the turntable, so that the disk 50 to be rotated together with the turntable 40 is Sliding against the turntable 40 is reliably prevented. Then, the first protrusion 71 protruding toward the spring member 80 in the center of the pressing member 70 is accommodated in the groove formed in the body portion 81 of the spring member 80, the center of the pressing member 70 The second protrusion 72 protruding toward the protruding portion 42 of the turntable 40 is accommodated in the receiving portion 40a formed in the protruding portion 42 of the turntable 40. Thus, for example, even when the disc player is used upright, the pressing member 70 is accurately positioned coaxially with the turntable 40, and the disk 50 is clamped by the turntable 40 and the pressing member 70. It is possible to effectively suppress the vibration generated during the rotation by the spindle motor (3) in the state to be able to smoothly rotate the disk 50.

On the other hand, the clamping state of the disk 50 described above is released by the lowering of the deck (2). That is, when the deck 2 is lowered, the turntable 40 is lowered while overcoming the attraction between the magnet 48 and the magnetic body 90. Accordingly, the disk 50 performs a process opposite to the above-described clamping process. After that, it is spaced apart from the turntable 40 and the pressing member 70 again. During this process, the pressing member 70 receives a reaction force in a direction in which the magnetic body 90 is spaced apart from the magnet 48, and the reaction force is absorbed by the spring member 80. Therefore, in contrast to the conventional clamping device, when the clamping member 70 collides with the plate 60 by the reaction force as described above, a large noise is generated. In the disk clamping device according to the present invention, Noise is not generated even when the disk 50 is clamped.

In the clamping device of the present embodiment, the turntable 40 is formed by separately manufacturing and combining the base portion 41 and the protrusion 42, but the base portion and the protrusion may be integrally formed. In addition, although the engaging member 45 is separately coupled to position the disk 50 coaxially with the turntable 40, the elastic member is formed to be elastically deformed to the protrusion, so that the protrusion is inserted into the through hole of the disc. When losing, of course, it can also be configured to be in close contact with the inner circumference of the through hole.

In addition, various other types of turntables are well known to those skilled in the art, and most of these various turntables may be suitably employed in the clamping device of the present invention without departing from the scope of the present invention.

On the other hand, in the disk clamping apparatus of the present embodiment, the friction member 44 made of elastic material such as rubber is attached to the base portion 41 of the turntable 40, but the friction member 44 is not necessarily required. . For example, the base portion 41 may be coated with a material having a large coefficient of friction to increase friction with the disk.

As described above, the disc clamping apparatus of the disc player according to the present invention is configured such that the pressing member for pressing the disc together with the turntable is elastically biased to the turntable side by the spring member, so that the disc is clamped reliably to rotate the disc. In addition to preventing slipping against the turntable, it is also possible to effectively suppress the generation of noise during clamping release.

Claims (5)

A base portion facing one side of the disc transferred into the disc player housing and a protrusion fitted into a through hole formed in the center of the disc, the fixed portion being fixed to an output shaft of the spindle motor installed in the disc player housing to be accessible to the disc; A turntable; A plate positioned to face the other side of the disc and fixed to a housing of the disc player; A pressing member installed on the plate to allow a predetermined distance to the disk and to be spaced apart from the disk at a position facing the other side of the disk; A spring member for elastically biasing the pressing member in a direction approaching the disk; A magnet fixed to the tip of the protrusion of the turntable; And a magnetic body fixed at a position facing the magnet of the pressing member. According to claim 1, The spring member is a body portion fixed to the plate, the contact portion which is located at a position spaced apart from the disk side with respect to the body portion in contact with the pressing member, elastically deformable and both ends are And a plurality of elastic deformation parts fixed to the body portion and the contact portion, respectively. The disk clamping device of a disc player according to claim 2, wherein the elastic deformation parts each have a curvature having a predetermined curvature. According to claim 3, wherein the center of the pressing member is a first projection for positioning protruding toward the spring member side, the contact portion of the spring member is characterized in that the groove portion for receiving the first projection of the pressing member is formed. Disc clamping device for a disc player. According to claim 3 or 4, wherein the center of the pressing member is formed with a positioning second projection protruding toward the projection of the turntable, the projection of the turntable receiving portion for receiving the second projection of the pressing member Disc clamping device of a disc player, characterized in that formed.