JPH0341307Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field The present invention relates to a holding mechanism equipped with a clamper for holding a disk, such as a compact disk, onto a turntable.

BACKGROUND ART In the prior art, a disk recording/reproducing apparatus is configured such that the disk is pressed onto a turntable by a clamper and the disk is rotated integrally with the turntable. When the disk is ejected, this clamper is in a free state, so when the storage/playback device vibrates, it vibrates accordingly, producing abnormal noise and so-called chatter. .

Problems to be Solved by the Invention The purpose of the invention is to prevent the clamper that presses the disc onto the turntable during recording/playback from causing undesirable vibrations when the disc is ejected, and to It is an object of the present invention to provide a disk holding mechanism which prevents disk rotation from becoming a load by releasing the bias against the clamper.

Means for Solving the Problems The present invention moves the disk above the turntable in its radial direction, brings it directly above the turntable, and then lowers it onto the turntable so that the upper surface of the disk on this turntable is moved. A disk holding mechanism that drives a clamper that presses the disk in conjunction with the movement of the disk includes a support member that rotatably supports the clamper, and a support member that holds the support member and swings in conjunction with the movement of the disk. a swinging member that presses or separates the clamper from the turntable; a base body that holds the swinging member from both sides and is connected at the top by a connecting portion; and a leaf spring that resiliently biases the clamper downward, and the leaf spring resiliently biases the clamper with the legs when the clamper is above the disk. The disk holding mechanism is characterized in that the clamper is brought into contact with the support member and the leg portion is provided so as to be separated from the clamper when the clamper is pressing the upper surface of the disk.

Effect According to the present invention, the clamper is located above the disk, and therefore, when the disk is not pressed by the turntable, that is, when the disk is ejected, the clamper is elastically attached by the legs of the leaf spring. Since the clamper is brought into contact with the support member by force, the clamper becomes free and is prevented from vibrating due to external impact, thereby eliminating chattering noise. In addition, when the clamper is pressing the top surface of the disk, the legs of the leaf spring move away from the clamper, so when the disk is in the recording/playback state, the force applied to the clamper by the leaf spring is released and the rotation of the disk is stopped. It doesn't become a burden.

Embodiment FIG. 1 is a simplified overall plan view of an apparatus for recording and/or reproducing a compact disk 40, and FIG. FIG. 3 is a side view showing the previous state or the state with the disk 40 ejected; FIG. 3 is a side view showing the state when the disk 40 is loaded and recording/reproduction is being performed; FIG. It is an exploded perspective view of a part.
Referring to these drawings, the base body 41 has a pair of side parts 42 and 43 and connecting parts 44 and 45 that connect these side parts 42 and 43. Side parts 42,4
Attachment pieces 46, 47, 48, 49 are formed at the ends of 3 and bent outward.
6, 47, 48, and 49 are fixed to the chassis of the recording/reproducing device. One side 42 of the base 41
A guide member 50 is arranged on the outer circumferential wall of , that is, the circumferential wall on the opposite side to the other side portion 43 . This guide member 50 has a first cam 51 and a second cam 52, and further has a guide elongated hole 53. These first
The cam 51, the second cam, and the guide elongated hole 53 extend along the insertion direction 54 of the disk 40 (see FIGS. 1 and 2). The guide slot 53 is located in the side portion 42
A guide pin 55 formed in is inserted therethrough. A rack 56 is formed at the lower part of the guide member 50.
A pinion 57 is engaged with this rack 56. A gear 58 is integrally fixed to the pinion 57, and the gear 58 is driven to rotate in forward and reverse directions by a power source including a motor 210. The guide member 50 is also formed with a guide slot 59 parallel to the guide slot 53, and a guide pin 60 fixed to the side portion 42 is inserted into the guide slot 59. In this way, the guide member 50 can be displaced back and forth in the insertion direction 54.

The first cam 51 has three cam surfaces 61, 62, 6
3, and the cam surface 61 is located at a higher position than the cam surface 63 on the downstream side in the insertion direction 54. Cam surface 62
is inclined so that the cam surfaces 61 and 63 are connected.

The second cam 52 has a cam surface 61 of the first cam 51,
Cam surfaces 64 and 6 corresponding to 62 and 63, respectively
5, 66, and cam surfaces 67, 68, 69,
has. The cam surfaces 67 to 69 are the same as the cam surfaces 64 to 6.
It is facing 6. These cam surfaces 64 to 66 and 67 to 69 are aligned in the insertion direction 54 of the disk 40.
The position becomes higher towards the downstream side of the river. A relatively large vertical interval l1 is formed on the cam surface 63 of the first cam 51, which serves to absorb errors in machining of each component and to enable smooth movement. Further, the distance l2 between the cam surfaces 64 and 67 of the second cam 52 is relatively large, so that even if the disk 40 has a relatively thick configuration as described later, such a thick disk 40
loading.

The support member 71 has a pair of side portions 72 and 73 and a connecting portion 74 that connects the side portions 72 and 73. Insertion holes 7 formed in side parts 72 and 73
Pins 77 and 78 protruding from the inner circumferential walls of the side parts 42 and 43 of the base 41 are inserted into the pins 5 and 76, respectively, so that the support member 71 is inserted into the pins 77 and 78.
Angular displacement around the axis is possible. The pin 79 protruding from the side portion 72 is inserted through a relatively large through hole 80 formed in the side portion 42, thereby allowing the aforementioned angular displacement of the support member 71, and
The amount of angular displacement is limited.

Locking protrusions 81 and 82 are formed on the opposite side of the pin 79 with respect to the insertion holes 75 and 76 of the side parts 72 and 73, that is, on the upstream side in the insertion direction 54. , 84 are locked. The other ends of the springs 83 and 84 are engaged with locking protrusions 85 and 86 formed on the side portion 43 of the base 41.
is locked. The axes of the insertion holes 75 and 76, and therefore the pins 77 and 78, are on a straight line perpendicular to the insertion direction 54. Due to the action of the spring 84, the support member 71 moves around the axis of the pins 77, 78 at the arrow mark 87.
An elastic rotational force is applied.

Roller 8 for inserting and ejecting the disk 40
The rotation shafts 89 and 90 of 8 are connected to the sides 42 of the basic 41,
It is rotatably inserted into insertion holes 91 and 92 formed in 43. A gear 93 is fixed to the end of the roller 88. This gear 93 is driven by a drive source including a gear meshing with the gear 93, a motor, etc. so that it can freely rotate in forward and reverse directions. A rotating shaft 95 of another roller 94 arranged below the roller 88,
96 is rotatably inserted into insertion holes 97 and 98 formed in the side parts 72 and 73 of the support member 71.
The rotational axes of rollers 88, 94 are parallel and perpendicular to insertion direction 54. Rotating shaft 9 of roller 94
The insertion holes 97 and 98 supporting the springs 83 and 96 are located on the side opposite to the springs 83 and 84 with respect to the insertion holes 75 and 76 in the side portions 72 and 73 of the support member 71. Therefore, the roller 94 is elastically biased against the roller 88 by the action of the springs 83 and 84. The roller 88 is made of a material such as rubber that has elasticity, and the roller 94 is made of a material that has some elasticity, such as polyacetal resin.

The connecting portion 74 of the support member 71 has a front portion 74a that serves to guide the lower surface of the disk 40 when the disk 40 is initially inserted or when the disk 40 has been ejected.
and a rear portion 74b that is connected to the front portion 74a and bent downward.

A first swinging member 100 is provided in association with the base body 41 . This first swinging member 100 includes support parts 101 and 102, and these support parts 101 and 10.
2, and arms 104, 1 extending from the connecting portion 103 to the upstream side in the insertion direction 54.
05. Each of the insertion holes 106 and 107 of the support parts 101 and 102 is inserted into a pin 107 that projects inwardly from the side part 42 of the base body 41 and a pin 108 that projects outwardly from the side part 43, respectively. This allows the first swinging member 100 to swing.

Another second rocking member 109 is shown in FIG. This second swinging member 109 also
Similar to the swinging member 100, the supporting parts 110 and 111
, a connecting portion 112 that connects them, and arms 113 and 114 that extend upstream in the insertion direction 54. The pin 115 protruding from the support portion 110 of the second swinging member 109 is loosely inserted into the insertion hole 116 formed in the side portion 42 of the base body 41, thereby causing the second swinging member 109 to swing. While the movement is allowed, the range of swing is limited. Second swinging member 1
Each insertion hole 117, 118 formed in 09
is the pin 11 protruding from the side parts 42 and 43.
9 and 120 respectively for angular displacement.
The support parts 101, 110 of the first and second swing members 100, 109 have pins 121, 12 extending inwardly.
2 are provided protruding from each other. These pins 121,
122 are connected by a connecting part 123.

FIG. 6 shows the connecting means 12 including the connecting member 123.
FIG. 4 is an exploded perspective view of No. 4. The connecting member 123 includes a pair of L-shaped brackets 125 and 126, a coiled compression spring 127, a bolt 128, and a U-shaped spring 129. Bracket 125 has a pivot portion 130 and a protrusion 131. The pin 122 is inserted into the insertion hole 132 of the pivot portion 130 . An internal threaded hole 133 is inserted through and carved into the protrusion 131 . The other bracket 126 similarly has a pivot 134 and a protrusion 135. The pin 121 is inserted into the insertion hole 136 of the pivot portion 134 . The protrusion 135 has an insertion hole 1
37 is formed. A spring 127 is interposed between the protrusions 131 and 135. The bolt 128 is inserted gently through the insertion hole 137, and then the spring 127 is inserted.
is inserted gently into the internal threaded hole 133.

At both ends of the U-shaped spring 129, locking parts 138, 1 are bent so as to open in the direction of separation from each other.
39 is formed. This locking part 138, 139
are the small diameter locking grooves 140 of the pins 121, 122,
141. The spring 129 is connected to the locking portion 13
8,139, therefore pins 121,122,
The springs are biased in the direction of mutual separation. Bolt 1 mentioned above
The spring 127 through which 28 is inserted is attached to the bracket 1.
25 and 126 are spring-biased in the direction of separation from each other.

FIG. 7 is a sectional view of the vicinity of the pin 121. The end 138 of the spring 129 is connected to the locking portion 1 of the pin 121.
40 and the pivot portion 130 of the bracket 125
prevents it from coming off the pin 121. The other pin 122 also has a similar configuration.

Figure 8 shows pins 121, 122 and bracket 1.
25 and 126 are simplified cross-sectional views showing the relationship between the insertion holes 132 and 136. FIG. The brackets 125 and 126 are urged away from each other by the spring force of the spring 127, so that the pin 1
21 and 122 are provided with an insertion hole 1 on the surface in the direction of mutual proximity.
The inner circumferential surfaces of 32 and 136 are in contact with each other.

By selecting the spring force of the spring 127 to be a value sufficiently larger than the force required to displace the first and second swinging members 100, 109, the state of contact between the pins 121, 122 and the insertion holes 132, 136 can be adjusted. It remains as shown in Figure 8. Therefore, wobbling in the angular displacement positions of the first and second swinging members 100 and 109 is prevented, and it becomes possible to integrally interlock the swinging members 100 and 109 without causing any delay in operation. This makes the first
And simultaneous smooth angular displacement of the second swinging members 100, 109 becomes possible.

FIG. 9 is a side view of the side portion 42 of the base body 41. The distance s1 between pins 121 and 122 is equal to the distance s2 between pins 107 and 119 (s1=s2).
A parallelogram link is thus constructed. By the bolt 128 of the connecting member 123, the pin 121,
The distance s1 between 122 can be finely adjusted to be equal to the aforementioned distance s2.

FIG. 10 is a side view of the guide member 143.
This guide member 143 is made of a synthetic resin material, and has a ridge line 144 that the lower outer peripheral edge of the disk 40 contacts,
It has 145. This ridgeline 144 makes an angle θ1 with the horizontal bottom surface 146, which is about 45 degrees. This ridgeline 1
44 to the downstream side in the insertion direction 54
5 makes an angle θ2 with respect to the horizontal bottom surface 146, which is smaller than the angle θ1. Ridge line 14 of guide member 143
4 and 145 lie within a common plane perpendicular to the horizontal plane, and these ridgelines 144 and 145 incline toward the center as they move downstream in the insertion direction 54 in the guide path of the disk 40. Guide member 143
has a mounting piece 147 on the downstream side in the insertion direction 54, and an insertion hole 149 through which a bolt 148 is inserted is formed in this mounting piece 147. The bolt 148 is
It is inserted through the insertion hole 149 and screwed into the internal threaded hole 151 of the mounting base 150 bent inward on the upstream side of the insertion direction 54 in the support portion 110 of the second swinging member 109 . In this way, the guide member 143 is fixed to the mounting base 150. A guide member 153 is also fixed to a mounting base 152 on the other support portion 111 of the second swinging member 109 . This guide member 153 is aligned with the guide member 143 with respect to a central line 154 of the guide path of the disk 40 parallel to the insertion direction
It is symmetrical.

The angle θ1 of the ridge line 144 is selected to be relatively large as described above, so that even when the distal end of the disk 40 is inserted downward, for example as indicated by reference numeral 155 in FIG. is displaced upwardly along the insertion direction 54;
This allows it to be inserted horizontally and held between the rollers 88 and 94.

The angle θ2 of the ridge line 145 following this ridge line 144 is selected to be relatively small. When the disc is inserted substantially horizontally as shown at 156, or downwardly as shown at 155, it will be corrected by the ridge 144 and will be aligned with the reference 1
When guided as indicated at 56, the disk 40 can be guided immediately upon insertion in the insertion direction 54. This allows the disk 40 to be held between the rollers 88 and 94 in a correct horizontal position.
Further, when the disk 40 is mounted on the turntable 157, the second swinging member 109 is displaced downward, and at this time, the ridge line 145 is separated from the disk 40 on the turntable 157. Due to the small angle θ2, the distance of the ridge line 145 from the lower outer peripheral edge of the disk 40 on the turntable 157 is achieved by only slightly displacing the guide member 143 downward.

FIG. 11 is a longitudinal sectional view of the rollers 88, 94, and FIG. 12 is a simplified plan view of the rollers 88, 94. The rollers 88, 94 are configured symmetrically with respect to a vertical plane passing through the center line 154, and the vicinity of the ends of the rollers 88, 94 are shown in an enlarged view in FIG. The rollers 88 sequentially move toward the truncated cone 1 from the center line 154 to the ends.
58, 159, and 160 are formed in this order.
Center angle α1, α of truncated cone 158, 159, 160
2 and α3 are defined as α1<α3<α2. The roller 94 has truncated cones 161 and 162 from the center line 154 to the ends. truncated cone 16
The central angles β1 and β2 of 1,162 are determined as β1<β2. When the disk 40 is guided in a substantially horizontal state by the guide members 143 and 153 in this manner, it is sandwiched between the conical truncated cones 160 and 162 as indicated by reference numeral 163. This condition is also indicated by reference numeral 163 in FIG. The optical detection element 164 detects the disk 163 and drives the drive source to rotationally drive the gear 93 and therefore the roller 88, thereby causing the reference numeral 1
The disk 40 in the state 63 is automatically conveyed downstream in the insertion direction, that is, upward in FIG. 12. For example, if the disk 40 is tilted upward,
Even if the disk 144 is inserted in the insertion direction 54 while in contact with the truncated cone 158 as indicated by reference numeral 164 in the figure, the upper outer peripheral edge of the disk 144 contacts the truncated cone 158 to the truncated cone 159, and the truncated cone 160 and the truncated cone 162
It will be caught between. The state of the disk 40 upon completion of loading is indicated by reference numeral 212 in FIG. 12, and this state is detected by the detection element 211.

By setting the angles α2 and β2 larger than the angles α1 and β1 closer to the center, the disk 40 is
By manually pushing it a short distance C2 from the initial position 165 to the position indicated by reference numeral 163 as shown in Figure 0, it is held between the rollers 88 and 94, and the roller 88 is driven and automatically retracted. . By reducing the distance C2 in this manner, loading can be performed by manually pushing the disk 40 by a small distance C2, improving operability. When ejecting the disk, the roller 88 is rotationally driven in the direction to eject the disk 40 until the disk 40 is no longer detected by the detection element 164, and the amount of protrusion of the disk 40 is relatively small. Therefore, the disk is prevented from being soiled or dusty due to contact with the disk, and the disk 40 is prevented from falling by mistake. Roller 94 may have a similar configuration to roller 88.

FIG. 14 is a simplified diagram for explaining operations related to the guide member 50. disk 4
0 from the initial position 165 to reference 163 in FIG.
When inserted as shown in , the detection element 16
4 detects the disk 163, thereby driving the roller 88. Next, when the detection element 200 (see FIG. 12) detects that the disk 40 has been pulled onto the turntable 157 by driving the roller 88, the gear 58 is driven.
Therefore, the guide member 50 moves in the insertion direction 54. The pin 79 of the support member 71 is guided from the cam surface 67 of the second cam 52 to the cam surfaces 68, 69 and 70, and the roller 94 is lowered. Further, the pin 115 of the second swinging member 109 moves from the cam surface 61 of the first cam 51 to the cam surfaces 62 and 63, and in response, the second swinging member 109 moves to the 12th cam surface around the axis of the pin 119. Displace in the counterclockwise direction in the figure. Therefore, the holding means 168 provided on the upstream side of the second swing member 109 in the insertion direction 54 is lowered. When the disc 40 is directly above the turntable 157, the holding means 168 holds the compact disc 4
0 on the turntable 157. The guide member 143 guides the disc 4 on the turntable 157.
0, and the guide member 143 and the disk 40 on the turntable 157 are separated from each other. This also applies to the other guide member 153. In this state, the disk 40 is driven by the turntable 157, and recording/reproduction is performed by the pickup 169 (see FIG. 4).

When ejecting the disk 40 on the turntable 157, the gear 58 is driven by the drive source so that the disk 40 moves in a direction opposite to the insertion direction 54. This allows the pin 79 to
0 to cam surface 67 via cam surfaces 69 and 68. At the same time, the pin 115 reaches the cam surface 61 from the cam surface 63 via the cam surface 62. In this way, the disk 40 is displaced upward from the turntable 157 and is driven by the roller 88 in the insertion direction 54.
is discharged in the opposite direction. The driving of the roller 88 continues until the disk 40 is no longer detected by the detection element 164.

In this way, when inserting the disk 40, it first moves horizontally and then descends onto the turntable 157, and when ejecting the disk 40, the disk 40 is displaced upward from the turntable 157,
Next, move horizontally. In this way disk 40
The disc 40 can be reliably mounted on the turntable 157, and damage caused by undesired collision of the disc 40 with other components during insertion and ejection can be avoided.

FIG. 15 is a plan view of the holding means 168, and FIG. 16 shows a state in which this holding means 168 is free, that is, when the disk 40 is held on the turntable 15.
7 is a cross-sectional view showing a state in which the first
7 is a sectional view showing a state in which the disc 40 is held on the turntable 157 by the holding means 168, and FIG. 18 is an exploded perspective view of the holding means 168. In the holding means 168, a pin 171 of a support member 170 made of a synthetic resin material engages with a notch 173 formed in the arm 104 of the first swinging member 100. Further, the pin 172 provided on the upstream side of the insertion direction 54 of the support member 170 is
It is inserted into the insertion hole 174 formed in the arm 113 of the second swinging member 109 . Pins 175 and 176 formed on the support member 170 are also supported in the notch 177 of the arm 105 and the insertion hole 178 of the arm 114 in the same manner. pins 171, 175
The axes of the pins 172 and 17 are in a straight line, and the pins 172 and 17
6 axis is on the other axis, pin 17
1,175 and pins 172, 176 are parallel to each other. Opening 179 formed in support member 170
A pressing portion 181 of a clamper 180 made of a synthetic resin material is loosely fitted into. Clamper 18
The outward flange 182 of 0 is the seat 1 of the opening 179.
It will be loaded on board 83. This clamper 180 is coaxially formed with an upwardly convex spherical protrusion 184. The cover 185 has a turntable 1
A contact piece 186 having an axis on a straight line common to the axis of 57 is fixed in the attachment hole 187. This contact piece 186 has a flat surface that contacts the protrusion 184, and this flat surface 186 is perpendicular to the axis of the turntable 157. Screws 194, 195, 196, which are loosely inserted into the insertion holes 191, 192, 193 of the support member 170, are screwed into the internal screw holes 188, 189, 190 formed in the cover 185, and in this way the clamper is inserted. 180, the flange 182 is inserted into the seat 1 with the pressing part 181 inserted into the opening 179.
It is rotatably housed between the cover 83 and the cover 185.

A bolt 19 is attached to a roughly U-shaped leaf spring 197.
The bolt 199 is screwed into a screw hole 200 formed in the connecting portion 45 of the base body 41, whereby the leaf spring 1
97 is fixed to the connecting portion 45. The legs 201, 202 of the leaf spring 197 can contact the upper surface of the clamper 180 as indicated by reference numerals 203, 204.

Referring again to FIG. 9, the distance s3 between pins 119 and 172 is chosen to be equal to the distance s4 between pins 121 and 171 (s3=s4). A parallelogram link is thus constructed. The distance between pins 171, 172 is chosen equal to the aforementioned distance S1. Therefore, the first
When the second swinging members 100, 109 are angularly displaced, the clamper 180 of the holding means 168 can move up and down while keeping its axis vertical.
The disk 40 on the turntable 157 can be pressed by the pressing portion 181 of the clamper 180 by making surface contact with it as shown in FIG. At this time, the legs 201 and 202 of the leaf spring 197
0, and the leaf spring 197 is spaced apart from the clamper 180. The protrusion 184 of the clamper 180 is
The save 181 of the clamper 180 is in contact with the contact piece 186, and the compression spring 1 acting on the second swinging member 109
27 (see FIG. 6) presses the disk 40 and rotates together with the disk 40.

When the disc 40 is not loaded on the turntable 157, the holding means 168 is above the turntable 157, and at this time the 16th
Legs 201, 2 of spring 197 as shown
02 refers to the upper surface of the clamper 180 with reference numerals 203 and 2.
Spring bias downward at position 04. Therefore, the flange 182 is the seat 183 of the support member 170.
It comes into contact with. With this, clamper 1
80 is not undesirably displaced due to external vibrations, no abnormal noise is generated, and so-called chatter can be prevented.

Effects As described above, according to the present invention, when the disk is ejected, the clamper comes into contact with the support member due to the elastic bias from the legs of the leaf spring.
The clamper becomes free and is prevented from vibrating due to external impact, eliminating the occurrence of chattering noise. Furthermore, when the clamper is pressing the top surface of the disk, the legs of the leaf spring separate from the clamper, so when the disk is in the recording/playback state, the force applied to the clamper by the leaf spring is released, and the load on the rotation of the disk is released. It will never become.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is a side view of the embodiment without the disk 40 inserted, FIG. 3 is a side view of the embodiment with the disk attached, and FIG. FIG. 4 is an exploded perspective view of a part of this embodiment, and FIG. 5 is a diagram showing the first and second swinging members 10.
0,109 and its vicinity, FIG. 6 is an exploded perspective view of the connecting means 124, and FIG. 7 is an exploded perspective view of the pin 121.
8 is an enlarged sectional view of the vicinity of the pins 121, 122, FIG. 9 is a simplified side view of the first and second swinging members 100, 109, and FIG. 10 is a side view of the guide member 143. Figure 11 shows the roller 8.
8, 94, FIG. 12 is a cross-sectional view of rollers 88, 94.
A simplified plan view of FIG. 13 shows the rollers 88, 9.
14 is a simplified side view of the guide member 50 and its vicinity, FIG. 15 is a plan view of the holding means 168, and FIG. 17 is a sectional view showing a state in which the disk 40 is held by the holding means 68, and FIG. 18 is an exploded perspective view of the holding means 168. 41... Base body, 42, 43... Abdomen, 44, 4
5... Connection portion, 50... Guide member, 51... First cam, 52... Second cam, 53, 59... Guide slot, 56... Rack, 71... Support member, 8
3, 84... Spring, 88, 94... Roller, 10
0...first swinging member, 109...second swinging member,
124... Connection means, 123... Connection member, 12
5,126...Bracket, 127...Spring, 1
28... Bolt, 129... U-shaped spring, 14
3,153...Guide member, 144,145...Ridge line, 158,159,160,161,162...
... truncated cone, 168 ... holding means, 170 ... support member, 180 ... clamper, 185 ... cover,
197...Leaf spring.

Claims (1)

[Claim for Utility Model Registration] Moving the disk above the turntable in its radial direction and bringing it directly above the turntable,
Next, the clamper descends onto the turntable and presses the top surface of the disk on the turntable.
A disk holding mechanism that is driven in conjunction with the movement of the disk includes a support member that rotatably supports the clamper, and a support member that holds the support member and swings in conjunction with the movement of the disk to move the clamper to the turntable. a swinging member that presses or separates the swinging member; a base that holds the swinging member from both sides and is connected at the top by a connecting portion; and elastic legs fixed to the connecting portion that elastically push the clamper downward. and a plate spring that elastically biases the clamper with the legs when the clamper is above the disk, and the plate spring resiliently biases the clamper with the support member. A disk holding mechanism, characterized in that the leg portion is provided so as to be in contact with the clamper and to be spaced apart from the clamper when the clamper is pressing the upper surface of the disk.