KR100309291B1 - Apparatus for clamping disk - Google Patents

Abstract

The present invention relates to a disk clamping device, and more particularly, a base in which a coil is mounted and a fixed shaft is fixed at the center thereof, and a permanent magnet is mounted so that the disk can be rotated when power is applied to the coil, and a disk is loaded on the upper side. A turntable, a rotor installed on the upper side of the turntable while being rotated together with the rotation of the turntable, a projection disc installed between the rotor and the turntable and having a plurality of ramps inclined upwardly from the center to the outside; Providing a thin disk clamping device composed of a clamping means comprising a plurality of clamping pins installed to clamp the disk while moving the rotor up and down along the ramp of the projection disc, the overall system is as thin as possible CD-ROM case Is getting thinner and thinner It is to make it easy to cope with the recent trend.

Description

Thin Disk Clamping Device {Apparatus for clamping disk}

The present invention relates to a disk clamping device, and more particularly, to a thin disk clamping device that is thin enough to be applicable to a slim slot CD-ROM drive mechanism for a notebook.

In general, an apparatus for clamping a disk includes when the disk is loaded on a turntable for rotating the disk, a separate clamping device installed on the upper side of the turntable descends to clamp the disk, and a clamping device on the turntable for rotating the disk. In addition, the turntable is lifted by the rotation of the motor shaft, and the disk can be largely divided into clamping.

Hereinafter, each embodiment will be described in detail with an example.

1 is a block diagram illustrating a disk clamping device according to a first embodiment of the prior art.

Referring to FIG. 1, in the first embodiment of the prior art (US Patent 4,797,873 (January 10, 1989)), a motor for rotating the turntable 1 when the disk D is loaded on the turntable 1 2) is driven.

Thereafter, the first link 6 is moved to the left by a combination of the pinion 4 and the rack 5 formed on the motor shaft 3 and the first link 6, respectively. When the first link 6 is moved, the second link 7 having one end connected to the end of the first link 6 is rotated.

Thereafter, when the third link 8 connected to the other end of the second link 7 is moved to the right, and the third link 8 is moved, the cam curved surface 8 ′ formed on the third link 8 is moved. Accordingly, the clamper 9 formed of the magnet is lowered and inserted into the fixing hole of the disk D. Thus, the clamping of the disk D is completed.

Thereafter, the turntable 1 is rotated by the driving force of the motor 2 to rotate the disk D.

However, in the above-described first embodiment of the prior art, since the clamper 9 for clamping the disk D is separately installed on the upper side of the turntable 1, the clamper 9 is installed, as well as the clamper 9. As a separate space for the descending of (9) is required, the entire system has a structure formed long in the vertical direction, and thus, there is a problem that the thinning of the system for applying to a notebook is structurally impossible.

2 is a side sectional view showing a disk clamping device according to a second embodiment of the prior art, and FIG. 3 is a side sectional view showing a state in which a disk is clamped according to a second embodiment of the prior art.

2 and 3, in the second embodiment of the prior art (US Patent 5,631,894 (May 20, 1997)), when the disk D is loaded, the lower motor 11 is driven to drive the motor shaft ( The fixing part 13 coupled to 12 is rotated. When the fixing part 13 is rotated, the moving part 14 which is screwed with the fixing part 13 is rotated and raised along the motor shaft 12.

Thereafter, when the friction surface 16 ′ of the clutch portion 16 formed on the upper end of the motor shaft 12 and the friction surface 14 ′ of the moving portion 14 come into contact with each other, the moving portion 14 is raised. This stops and this time point becomes the rotation initial point of the disk D.

At the same time, the disk D is placed on the pedestal 15 formed at the upper end of the moving part 14 while the upper end of the moving part 14 is inserted into the fixing hole of the disk D. The moving part 14 The clamping arm 18 installed on the upper side of the c) is operated by the washer 17 of the clutch unit 16 to be in close contact with the fixing hole of the disk D, thereby completing the clamping of the disk D.

Thereafter, when the moving unit 14 is rotated by the driving force of the motor 11, the moving unit 14 having the pedestal 15 is formed to perform a function of a turntable to rotate the disk D.

However, according to the second embodiment of the related art, a motor 11 for clamping and rotating the disk D is installed at the lower side and moved up and down according to the rotation of the motor shaft 12 to perform a function of a turntable. Since the moving part 14 is installed and the clutch part 16 for operating the clamping arm 18 is formed at the upper end of the motor shaft 12, the installation space of the motor 11 and the clutch part 16 is Of course, the free space for the vertical movement of the moving unit 14 is required, so that the entire system is formed in the vertical direction elongated, and accordingly, there is a problem that the thinning of the system for applying to the notebook is structurally impossible.

4 is a plan view illustrating a disk clamping device according to a third embodiment of the prior art, and FIG. 5 is a side view illustrating an operation relationship between a turntable, a cam potion, and a tray in a third embodiment of the prior art. Is a configuration diagram showing an operation sequence in which the disk is clamped by the clamper arm in the third embodiment of the prior art.

4 to 6, in the third embodiment of the related art (US Patent 5,774,445 (June 30, 1998)), when the tray 21 loaded with the disk D is inserted, the tray 21 is moved by the tray 21. The cam potion 22 is activated.

When the cam potion 22 is operated, the clamping plate 24, which is installed so that the upper surface of the clamper arm 23 is positioned on the same plane as the lower surface of the disk D in FIG. 6A, is moved upward. .

When the clamping plate 24 is raised, the clamper arm 23 is inclined inward, as shown in FIG. 6B, and through this process, the upper end of the clamper arm 23 is fixed to the disk D. When completely exiting the upper side as shown in (c) of FIG. 6 as the protrusion of the turntable 25 is inserted into the fixing hole of the disk (D), the lower surface of the disk (D) is in close contact with the upper surface of the turntable (25).

Thereafter, when the clamping plate 23 is separated from the turntable 25 by the elastic force of the compression spring 26 and lowered, the upper end of the clamper arm 23 is moved outward as shown in FIG. By close contact with the fixing hole of the disk D, the clamping of the disk D is completed.

Thereafter, when the turntable 25 is rotated by the driving force of the motor 27, the disk D is rotated.

According to the third embodiment of the present invention, the turntable 25 for rotating the disk D includes a clamper arm 23 and a clamping plate 24 for clamping the disk D. Therefore, it is slightly advantageous in terms of space utilization as compared to the first and second embodiments described above.

However, the third embodiment described above has a cam potion 22 for raising the turntable 25 when the motor 27 for providing a driving force to the turntable 25 is installed below the tray 21 and the tray 21 is inserted. Because of this, the installation space of the motor 27 and the cam potion, as well as the free space for the vertical movement of the turntable 25 is required, so that the whole system is similar to the first and second embodiments described above. There is a problem in that the structure is formed long in the vertical direction.

Therefore, the above-described third embodiment of the present invention also becomes structurally impossible for the system for applying to a notebook.

In conclusion, the first, second, and third embodiments of the related art are new forms that can make this possible because the entire system is formed long in the vertical direction and is not suitable for realizing a thinner notebook. Disk clamping device is required.

The present invention has been made to solve the above problems, and includes a clamping device for fixing the disk to the turntable for rotating the disk and at the same time does not require a separate power unit such as a motor to provide rotational force to the turntable It is a first object of the present invention to provide a thin disk clamping device having a thin system so that the entire system can be made as thin as possible.

In addition, the present invention has a second object to provide a thin disk clamping device having a structure capable of clamping the disk stably without vibration to smoothly play the disk.

1 is a block diagram showing a disk clamping device according to a first embodiment of the prior art,

Figure 2 is a side cross-sectional view showing a disk clamping device according to a second embodiment of the prior art,

3 is a side sectional view showing a state in which a disk is clamped according to a second embodiment of the prior art;

4 is a plan view showing a disk clamping device according to a third embodiment of the prior art,

FIG. 5 is a side view illustrating an operation relationship between a turntable, a cam portion, and a tray in a third embodiment of the prior art; FIG.

6 is a configuration diagram showing an operation sequence in which the disk is clamped by the clamper arm in the third embodiment of the prior art;

7 is a block diagram showing a thin disk clamping apparatus according to a first embodiment of the present invention,

8 is a plan view of main parts of FIG.

9 is a configuration diagram showing a state in which the disk is clamped according to the first embodiment of the present invention,

10 is a plan view of main parts of FIG. 9;

11 is a plan view of a projection disc according to a first embodiment of the present invention,

12 is a cross-sectional view of FIG. 11,

13 is a block diagram showing a thin disk clamping apparatus according to a second embodiment of the present invention,

14 is a plan view of main parts of FIG. 13;

15 is a configuration diagram showing a state in which the disk is clamped according to the second embodiment of the present invention;

16 is a plan view of main parts of FIG. 15;

17 is a plan view of a projection disc according to a second embodiment of the present invention;

18 is a plan view and a side view of the clamping pin according to the first and second embodiments of the present invention.

<Explanation of symbols for main parts of the drawings>

51, 151: coil 53, 153: fixed shaft

55, 155: base 57, 157: permanent magnet

59, 159: Turntable 59 ', 159': Friction groove

61, 161: rotor 61 ', 161': friction

70, 170: protrusion disc 73: ramp

75a, 75b: lever protrusion 81, 181: clamping pin

85, 185: spring for clamping pin 87, 187: cap for release

173: projection 175: projection spring

Features of the thin disk clamping device according to the present invention for achieving the above object, the base is a fixed shaft fixed to the center and the coil is mounted so that power is applied, and permanently so that it can be rotated when power is applied to the coil A turntable on which a magnet is mounted and a disk is loaded on the upper side, a rotor installed on the upper side of the turntable so as to be rotated together with rotation of the turntable, and a plurality of rotors installed between the rotor and the turntable and inclined upward from the center And a clamping means including a plurality of clamping pins which are formed to clamp the disk while moving up and down the rotor while moving forward and backward along the ramp of the protrusion disk.

In addition, another feature of the thin disk clamping device according to the present invention, the base is a coil is fixed to the power and the fixed shaft is fixed to the center, and the permanent magnet is mounted so that it can be rotated when the power is applied to the coil A turntable loaded with a disk on the upper side, a rotor installed on the upper side of the turntable so as to be rotated together with the rotation of the turntable, and an arc-shaped protrusion formed between the rotor and the turntable and inclined upward from the center And a plurality of clamping means including a plurality of projection discs mounted thereon, and a plurality of clamping pins installed to clamp the disk while moving up and down along the projection of the projection disc.

The present invention configured as described above has the advantage that the whole system for clamping the disk can be made as thin as possible to easily cope with the recent trend of the CDROM case becoming thinner and thinner.

Hereinafter, a thin disk clamping apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

7 is a block diagram showing a thin disk clamping apparatus according to a first embodiment of the present invention, Figure 8 is a plan view of the main part of Figure 7, Figure 9 is a disk clamped by a first embodiment of the present invention 10 is a plan view of the main part of FIG. 9, FIGS. 11 and 12 are a plan view and a cross-sectional view of the protruding disc according to the first embodiment of the present invention, and FIG. 18 is a first embodiment of the present invention. (A) is a plan view, (b) is a side view as a block diagram which shows the clamping pin by an example.

In the thin disk clamping device according to the first embodiment of the present invention, as shown in FIGS. 7 to 10, the base 55 is mounted with a coil 51 and a fixed shaft 53 fixed to a center thereof so that power is applied. ), A turntable 59 having a permanent magnet 57 mounted thereon so as to be rotated when power is applied to the coil 51, and a disk D loaded thereon, and a turntable above the turntable 59. Rotor 61 is installed between the rotor 61 and the turntable 59, and a plurality of inclined paths 73 are formed to be inclined ascending in the outward direction from the center of the rotor 61 is installed so as to be rotated together with the rotation of 59) The disk 70 and the plurality of clamping pins 81 provided to clamp the disk D while moving forward and backward along the inclined path 73 of the protruding disk 70 and up and down the rotor 61. It comprises a clamping means comprising.

11 and 12, the inner and outer rotary paths 71a and 71b respectively include a central portion and an edge portion thereof so that the clamping pins 81 of the clamping means can rotate. Three inclined paths 73 are formed between the inner and outer rotary paths 71a and 71b to be inclined upwardly from the center to the outer direction, and at the same time to connect the inner and outer rotary paths 71a and 71b to each other. In front of and behind the inclined path 73, lever protrusions 75a and 75b which are positioned in the mutually staggered direction and allow rotation of the clamping pin 81 in one direction are respectively provided.

That is, at one side of the lever protrusions 75a and 75b, lever fixing fixtures 77a and 77b for limiting the rotation of the lever protrusions 75a and 75b in the direction are formed, and the lever protrusions 75a and 75b. On the other side of the lever projections (75a, 75b) in the direction of the rotation is possible and the lever projection springs (79a, 79b) to impart an elastic force to the lever projections (75a, 75b) to minimize friction with the clamping pin (81) ) Is installed so that the clamping pins 81 are reversely rotated in the inner rotary path 71a by the lever protrusions 75a and 75b, and the clamping pins 81 are rotated forward in the outer rotary path 71b. Among the lever protrusions 75a and 75b, those installed on the inner rotation path 71a are mounted on the fixed shaft 53.

In addition, the clamping means includes three clamping pins 81 installed to clamp the disk D while simultaneously moving up and down along the inclined path 73 of the projection disc 70. In addition, the clamping pin 81 is provided with a spring (85) for the clamping pin to enable the back and forth of the clamping pin 81 by providing an elastic force.

In addition, the rotor 61 has a sliding groove which is inserted back and forth by inserting the clamping pin 81 is formed so that the clamping pin 81 is slidably coupled.

In more detail, as shown in FIG. 18, the clamping pin 81 is inserted into the inclined path 73 of the protruding disc 70 and is moved back and forth while simultaneously sliding up and down and the sliding part. And a clamping part 83 formed at an upper end of the 82 and inserted into a sliding groove of the rotor 61 to be moved back and forth and clamping the disk D, and formed at both sides of the clamping part 83, respectively. It is composed of a spring mounting hole 84 is mounted with a spring 85 for the clamping pin, the end of the portion of the clamping portion 83 in contact with the disk (D) is formed rounded so that the contact with the disk (D) is made naturally It is.

In addition, three frictional elements 61 'are formed on the outer surface of the rotor 61 so as to protrude in an outward direction, and correspond to the frictional element 61' of the rotor 61 of the turntable 59. A friction groove 59 'into which the friction member 61' is inserted to be movable up and down is formed at a portion thereof, and the rotor 61 is coupled to be rotated together with the turntable 59 while being moved up and down. .

In addition, at the upper end of the fixed shaft 53, a separation preventing cap 87 for preventing the detachment of the rotor 61 is rotatably installed, and between the rotor 61 and the separation preventing cap 87 therebetween. Bushing 89 is provided to prevent friction of the.

In addition, a chamfer may be formed at the upper edge of the rotor 61 to prevent the disc D from being separated when the rotor 61 is raised, and at the same time to center the disc D.

The thin disk clamping device according to the first embodiment of the present invention configured as described above operates as follows.

First, the disk D is loaded on the pad 60 formed on the upper side of the turntable 59, and then the power is applied to the coil 51 so that the coil 51 and the permanent magnet 57 interact with each other. Turn (59) forward.

When the turntable 59 rotates forward, the sliding portions 82 of the respective clamping pins 81 are caught by the lever protrusions 75a in the inner rotation path 71a of the protrusion disc 70, and the respective ramps 73 are rotated. Move along. As such, when the sliding portion 82 of the clamping pin 81 moves up along the inclined path 73 of the protrusion disc 70, the rotor 61 is coupled to the clamping portion 83 of the clamping pin 81. ) Is rotated together with the turntable (59).

Thereafter, when the sliding portion 82 of the clamping pin 81 reaches the outer rotational path 71b of the projection disc 70, the clamping portion 83 of the clamping pin 81 is fixed to the disk D. The disk D is clamped by the clamping pin 81 by contacting.

As such, when the clamping of the disk D is completed, the disk D is continuously rotated together with the turntable 59 and the rotor 61 in a clamped state by the clamping portion 83 of the clamping pin 81. At this time, the sliding portion 82 of the clamping pin 81 is rotated along the outer rotation path 71b of the projection disc 70, the separation preventing cap 87 is the rotor at the same time as the clamping of the disk (D) It is contacted with 61 and is rotating together.

Thereafter, when the turntable 59 is rotated in reverse after the regeneration of the disc D is completed, the sliding portion 82 of each clamping pin 81 rotates in the outer rotation path 71b of the protrusion disc 70. The clamping of the disk D is released while it is caught by 75b) and retracted along each ramp 73. FIG.

As the clamping of the disk D is released as described above, when the sliding portion 82 of the clamping pin 81 moves backward and downward along the inclined path 73 of the protruding disc 70, the rotor 61 is turned on the turntable ( 59) and it turns back down.

Thereafter, when the sliding portion 82 of the clamping pin 81 reaches the inner rotation path 71a of the projection disc 70, the turntable 59 and the rotor 61 rotate to some extent and stop. Thus, the de-clamping operation of the disk D is completed.

13 is a block diagram illustrating a thin disk clamping device according to a second embodiment of the present invention, FIG. 14 is a plan view of main parts of FIG. 13, and FIG. 15 is a view illustrating a disk according to a second embodiment of the present invention. FIG. 16 is a plan view of the main part of FIG. 15, FIG. 17 is a plan view of the protruding disc according to the second embodiment of the present invention, and FIG. 18 is a plan view of the clamping state according to the second embodiment of the present invention. (A) is a plan view, (b) is a side view.

In the thin disk clamping device according to the second embodiment of the present invention, as shown in FIGS. 13 to 16, a base 155 on which a coil 151 is mounted so that power is applied and a fixed shaft 153 is fixed to a center thereof is provided. ), A turntable 159 on which a permanent magnet 157 is mounted so as to be rotated when power is applied to the coil 151, and a disk D is loaded on the upper side thereof, and a turntable above the turntable 159. A plurality of rotors 161 installed to be rotated together with the rotation of the 159 and an arc-shaped protrusion 173 installed between the rotor 161 and the turntable 159 and formed to be inclined upward from the center are plural. A plurality of clamping pins installed to clamp the disk D while simultaneously moving up and down along the mounted protrusion disc 170 and the protrusion 173 of the protrusion disc 170. 181 consisting of clamping means .

Here, as shown in Figure 17, the projection disk 170, the inner and outer rotary paths (171a, 171b) are formed in the center and the edge portion so that the clamping pin 181 of the clamping means can rotate, Three arc-shaped protrusions 173 are formed between the inner and outer rotary paths 171a and 171b so as to be inclined in an upward direction from the center to the inner and outer rotary paths 171a and 171b. Between the protrusion 173 and the projection disc 170, the protrusion 173 is rotated in one direction by the protrusion 173 so that the clamping pin 181 can be rotated in only one direction in the inner and outer rotation paths 171a and 171b. Protruding springs 175 are provided to impart an elastic force to the outer rotary paths 171a and 171b.

That is, the protrusion 173 is pushed toward the inner and outer rotary paths 171a and 171b by the projection spring 175 so that both ends thereof protrude into the inner and outer rotary paths 171a and 171b, respectively. The clamping pin 181 is reversely rotated in the inner rotation path 171a by the end of the inner rotation path 171a of the protrusion 173, and is rotated outward by the end of the outer rotation path 171b of the protrusion 173. In the rotary path 171b, the clamping pin 181 is rotated forward. The projection spring 175 includes a first spring fixture 177 formed on the upper surface of the projection disc 170 and the projection 173. It is provided between the 2nd spring fixture 179 formed in the lower surface of the ().

In addition, the clamping means includes three clamping pins 181 installed to clamp the disk D while simultaneously moving up and down along the protrusion 173 of the protrusion disc 170. In addition, the clamping pin 181 is composed of a spring 185 for the clamping pin to enable the back and forth of the clamping pin 181 by providing an elastic force.

In addition, the rotor 161 is formed with a sliding groove that is inserted back and forth by the clamping pin 181 is coupled to the clamping pin 181 is slidably coupled.

In more detail, as shown in FIG. 18, the clamping pin 181 includes a sliding part 182 that is moved back and forth and up and down along the protrusion 173 of the protrusion disc 170, and the sliding part 182. The clamping part 183 and the clamping part 183 are respectively formed on both sides of the clamping part 183 and the clamping part 183 is inserted into the sliding groove of the rotor 161 and moved back and forth at the same time. It is composed of a spring mounting hole 184 is mounted 185, the end of the portion of the clamping portion 183 that is in contact with the disk (D) is formed so that the contact with the disk (D) is naturally made.

In addition, the outer surface of the rotor 161 is formed with three friction 161 ′ protruding outward, and corresponds to the friction 161 ′ of the rotor 161 of the turntable 159. A friction groove 159 'into which the friction 161' is inserted to be movable up and down is formed at a portion thereof, and the rotor 161 is coupled to be rotated together with the turntable 159 while being moved up and down. .

In addition, the upper end of the fixed shaft 153 is installed so that the separation preventing cap 187 to prevent the separation of the rotor 161 is rotatable, between the rotor 161 and the separation preventing cap 187 therebetween. Bushing 189 is provided to prevent friction of the machine.

In addition, a chamfer 161 ′ is formed at the upper edge of the rotor 161 to prevent the disc D from being separated when the rotor 161 is raised, and at the same time to center the disk D.

The thin disk clamping device according to the second embodiment of the present invention configured as described above operates as follows.

First, by loading the disk (D) on the pad 160 formed on the upper side of the turntable 159 and applying power to the coil 151, the coil 151 and the permanent magnet 157 by interaction with the turntable Turn 159 forward.

When the turntable 159 is rotated forward, the sliding part 182 of each clamping pin 181 is caught by one end of each protrusion 173 in the inner rotation path 171a of the protrusion disc 170 and the protrusion 173. Will move along one side of As such, when the sliding part 182 of the clamping pin 181 moves up along the protrusion 173 of the protrusion disc 170, the rotor 161 is coupled to the clamping part 183 of the clamping pin 181. ) Is rotated together with the turntable 159 to rise.

Thereafter, when the sliding part 182 of the clamping pin 181 reaches the outer rotation path 171b of the protrusion disc 170, the clamping part 183 of the clamping pin 181 is fixed to the disk D. The disk D is clamped by the clamping pin 181 by contacting.

As such, when the clamping of the disk D is completed, the disk D is continuously rotated together with the turntable 159 and the rotor 161 in a clamped state by the clamping part 183 of the clamping pin 181. At this time, the sliding portion 182 of the clamping pin 181 is rotated along the outer rotation path 171b of the projection disc 170, the departure preventing cap 187 is the rotor at the same time as the clamping of the disk (D) 161 is rotated in contact with it.

Thereafter, when the turn table 159 is reversely rotated after the regeneration of the disc D, the sliding part 182 of each clamping pin 181 is turned in the outer rotation path 171b of the protrusion disc 170. The clamping of the disk D is released by being caught by the other end of 173 and reversing along the other side of the protrusion 173.

When the clamping of the disk D is released as described above, when the sliding part 182 of the clamping pin 181 moves backward and downward along the protrusion 173 of the protrusion disc 170, the rotor 161 is turned on the turntable ( 159) is reversed and descends.

Thereafter, when the sliding part 182 of the clamping pin 181 reaches the inner rotary path 171a of the projection disc 170, the turntable 159 and the rotor 161 rotate to some extent and stop. Thus, the de-clamping operation of the disk D is completed.

In the thin disk clamping device according to the first and second embodiments of the present invention configured and operated as described above, the disk D is fixed to the turntables 59 and 159 for rotating the disk D. Rotors 61 and 161 and clamping pins 81 and 181, and permanent magnets 57 and 157 and coils 51 mounted on the turntables 59 and 159 and the bases 55 and 155. 151 has a structure in which the rotation force is provided to the turntable (59, 159), a separate installation space for installing the clamping device and a free space for moving the turntable (59, 159) up and down is unnecessary, There is no need to install the same separate power unit independently, so the overall system is as thin as possible.

That is, the clamping device according to the present invention can easily cope with the recent trend that the entire system is thinned to the maximum and the CD-ROM case becomes thinner, and it is possible to implement a CD-ROM drive mechanism for notebooks having a thickness of 12.7 mm. have.

In addition, the present invention is able to stably clamp the disk (D) without vibration by the clamping pins 81 and 181 for contacting the fixing hole of the disk (D) to clamp the disk (D). ) Has the advantage that the regeneration operation is smooth.

Claims (13)

A base having a coil mounted thereon so that power is applied and a fixed shaft fixed to the center thereof, a turntable having a permanent magnet mounted thereon so that the coil can be rotated when power is applied to the coil, and a disk loaded thereon, and a turntable above the turntable. The rotor is installed so as to be rotated together with the rotation, and the projection disc is provided between the rotor and the turntable, a plurality of ramps formed inclined upwardly from the center to the inclined upward direction, and moved forward and backward along the ramp of the projection disc Thin disk clamping device comprising a clamping means comprising a plurality of clamping pins installed to clamp the disk at the same time up and down. The method of claim 1, The protruding disc is formed with inner and outer rotary paths at the center and the edges, respectively, so that the clamping pins of the clamping means can rotate, and are inclined upwardly from the center to the outer direction between the inner and outer rotary paths, and at the same time. A plurality of inclined paths are formed to connect the rotary paths to each other, and the front and rear of the ramps are positioned in a mutually staggered direction, and at the same time, respectively, a thin disk is provided with a lever protrusion for allowing only one rotation of the clamping pin. Clamping device. The method of claim 1, The clamping means has a plurality of clamping pins installed to clamp the disk while moving forward and backward along the inclined path of the protruding disc, and provide an elastic force to the clamping pin to enable the clamping pin to move forward and backward. Thin disk clamping device, characterized in that consisting of elastic means. The method of claim 1, The rotor is a thin disk clamping device, characterized in that the clamping pin is inserted into the sliding groove is moved forward and backward is formed so that the clamping pin is slidably coupled. The method of claim 1, At least one friction member is formed on an outer surface of the rotor to protrude in an outward direction, and a portion of the turntable corresponding to the friction member of the rotor is provided with a friction groove in which the friction member is inserted to move vertically. Thin disk clamping device characterized in that the rotor is coupled to be rotated with the turntable while moving up and down. The method of claim 1, Thin disk clamping device, characterized in that the top of the fixed shaft is installed so that the separation preventing cap to prevent the separation of the rotor rotatable. A base having a coil mounted thereon so that power is applied and a fixed shaft fixed to the center thereof, a turntable having a permanent magnet mounted thereon so that the coil can be rotated when power is applied to the coil, and a disk loaded thereon, and a turntable above the turntable. A rotor installed so as to be rotated together with the rotation, a projection disc provided between the rotor and the turntable, and a plurality of arc-shaped projections formed to be inclined upward from the center, and forward and backward along the projection of the projection disc. Thin disk clamping device comprising a clamping means comprising a plurality of clamping pins installed to clamp the disk while at the same time up and down the rotor. The method of claim 7, wherein The protruding disc is formed with inner and outer rotary paths at the center and the edges, respectively, so that the clamping pins of the clamping means can rotate, and are inclined upwardly from the center to the outer direction between the inner and outer rotary paths, and at the same time. A plurality of arc-shaped projections connecting the rotary furnaces to each other are mounted, and an elastic force pushing the protrusions toward the inner and outer rotary furnaces so that the clamping pin can be rotated in one direction only in the inner and outer rotary furnaces by the projections between the protrusions and the projection disc. Thin disk clamping device, characterized in that the elastic means for providing a. The method of claim 7, wherein The clamping means has a plurality of clamping pins installed to clamp the disk while moving up and down the rotor while moving forward and backward along the projection of the projection disc, and providing elastic force to the clamping pin to enable the clamping pin to move forward and backward. Thin disk clamping device, characterized in that consisting of elastic means. The method of claim 7, wherein The rotor is a thin disk clamping device, characterized in that the clamping pin is inserted into the sliding groove is moved forward and backward is formed so that the clamping pin is slidably coupled. The method of claim 7, wherein At least one friction member is formed on an outer surface of the rotor to protrude in an outward direction, and a portion of the turntable corresponding to the friction member of the rotor is provided with a friction groove in which the friction member is inserted to move vertically. Thin disk clamping device characterized in that the rotor is coupled to be rotated with the turntable while moving up and down. The method of claim 7, wherein Thin disk clamping device, characterized in that the top of the fixed shaft is installed so that the separation preventing cap to prevent the separation of the rotor rotatable. The method of claim 7, wherein The upper edge of the rotor is a thin disk clamping device, characterized in that the chamfer is formed so that the disc is centered at the same time is prevented when the rotor is raised.