JPH0348764Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a disk clamp device used in digital audio disk players, video disk players, record players, etc., for pressing and fixing a disk to a turntable.

[Prior Art] In front-loading type compact disk players, the disk is conveyed onto the turntable by a tray and is pressed against the turntable to prevent the disk from shifting during rotation and to provide reliable information. A disk clamping device is provided for reading the data.

In order to clamp the disk, the following steps are performed: lowering the disk retaining plate of the tray and dropping the disk onto the turntable, and lowering the clamper onto the turntable to press the disk.

[Problems to be solved by the invention] Incidentally, the clamper is generally supported in a loosely fitted state at the tip of the clamp arm, but when the clamper is in contact with the clamp arm, frictional noise may be generated or noise may occur. , an error occurs in the number of rotations of the disc, making it impossible to play the disc correctly. Therefore, after clamping, it is necessary to hold the tip of the clamp arm at a predetermined height. However, if the clamp arm is flexible or the distance between the clamp arm's pivot point and the tip is long, variations in parts will be magnified, making it extremely difficult to maintain the tip of the clamp arm at a specified height. It is difficult and puts a burden on processing accuracy and assembly accuracy.

In view of the shortcomings of the conventional technology, the present invention provides a disk clamp device that can adjust the height of the tip of the clamp arm with a simple configuration and operation, and that can reduce the burden on the processing and assembly processes. Its purpose is to provide.

[Means for Solving the Problems] In the disk clamping device according to the present invention, a clamper for clamping a disk placed on a turntable is loosely fitted to the tip thereof,
In a disk clamping device that includes a clamp arm that is rotatably mounted on the main chassis and a rotation drive mechanism that is installed on the main chassis and rotates the clamp arm when performing a clamping operation, the rear end of the clamp arm has a rotatable A rising part is formed as a contact part that protrudes downward across the shaft, and a locking part is provided on the main chassis with which the rising part comes into contact to limit the rotation of the clamp arm, and this locking part is rotatable relative to the main chassis, and has a threaded surface on its outer periphery, so that the height of the tip of the clamp arm during clamping can be adjusted by rotating the locking part.

[Embodiment] Next, a disk loading device to which a disk clamp device according to an embodiment of the present invention is applied will be described with reference to the drawings.

In FIGS. 1 and 8, turntable 1
A tray 16 is disposed above a main chassis 14 equipped with a disc motor 12 directly connected to the turntable 10 and the turntable 10. This tray 1
6 is a circular recess 22 on which the disk 20 (see FIG. 8) is placed in the box-shaped portion 18 at the front (left side in FIG. 1).
is formed. The height of this recess 22 is lower than that of the turntable 10.

A cutout 24 is provided from the center to the rear end of the recess 22 to avoid contact with the turntable 10 and to prevent light projection from an optical pickup installed in the main chassis 14. Lifter arms 26 and 28 are attached to the lower side of the box-shaped portion 18 on both left and right sides when the tray 16 is viewed from the front (left side in FIG. 1). The lifter arms 26, 28 are formed completely symmetrically,
To explain the lifter arm 26, a rotary plate 30 arranged in the front-rear direction is rotatably supported at both longitudinal ends by a bracket 31 on the back side of the tray 16.

A pair of arm portions 32 protruding toward the center of the tray 16 are provided at both ends of the rotating plate 30, and a conical rubber receiver 34 is fixed to the upper side of the arm portion 32. A hole 36 is formed in the recess 22 in correspondence with the arm portion 32 . The lifter arm 26 has arm portions 32 at both ends of the rotating plate 30.
The arm portion 32 is compressed by a compression coil spring 38 (see FIG. 8) disposed between a spring seat formed on the opposite side of the tray 16 and a spring seat formed on the back surface of the tray 16.
The side is biased upward and protrudes upward from the hole 36. The upward movement of the arm portion 32 is
As shown in FIG. 8, a portion of the arm portion 32 comes into contact with the box-shaped portion 18, thereby being restricted.

Then, a patch plate 40 provided on the lower surface of the rotary plate 30
By pressing from the center side of the tray 16 to the side side, the arm part 32 is moved downward against the compression coil spring 38, and the turntable 10
A disk 20 can be placed on top. The rotary plate 30 and the arm portion 32 can be easily formed by integral molding, and the rotary plate 30 can be formed by pressing the backing plate 40.
Since the disk 20 can be loaded and unloaded by slightly rotating the disk, the mechanism is simple and does not take up much space.

Left and right side ends 42 and 44 of the tray 16 extend further rearward from the box-shaped portion 18. Tray 16
The lower surfaces of the side end portions 42 and 44 come into contact with rollers 46 provided at the front and rear on both the left and right sides of the main chassis 14, so that the main chassis 14 can be smoothly moved from a predetermined position in the front to a position above the turntable 10 in the rear. ing.

The movement of this tray 16 is performed at the side end 4.
A guide 48 provided on the main chassis 14 so as to be in sliding contact with the vertical inner walls of 2 and 44, and a side end 4
The main chassis 14 is guided by a guide 50 provided on the main chassis 14 so as to slide on the outer walls of the main chassis 14. The latter guide 50 also serves to prevent the tray 16 from coming off upward from the main chassis 14 (see FIG. 8).

The forward movement of the tray 16 when it is on standby is as follows:
A cantilever-like spring hook 54 attached to the front end of the main chassis 14 is engaged with an L-shaped portion 52 provided on the lower surface of the tray 16, thereby restricting the movement.
Furthermore, the back and forth movement of the tray 16 when it is set rearward is restricted by fitting the hooks 62 of lock arms 58 and 60, which will be described later, provided on the main chassis 14 into fitting holes 56 provided on the lower surface of the tray 16. (See Figure 9).

A loading drive mechanism 64 for moving the tray 16 is provided on the upper surface of the right side (lower side in FIG. 1) of the main chassis 14. As shown in FIGS. 1 and 2, a loading motor 66 is mounted vertically on the lower surface of the right side of the main chassis 14, and a rotating shaft 68 of the loading motor 66 protrudes above the main chassis 14, with a motor pulley 70 at its tip. It is fixed.

On the upper right surface of the main chassis 14, on the back side from the loading motor 66, there is a large pulley 74 coaxially integrally molded with the drive gear 72, and a drive gear 7.
2, and a main gear 80 as a pinion that meshes with a small gear 78 integrally molded coaxially with the intermediate gear 76.
These large pulley 74, intermediate gear 76, and main gear 80 are all supported by rotary shafts 82, 84, and 86 vertically erected on the main chassis 14, and when assembled, the main chassis 14 is placed flat and the upper The large pulley 74, intermediate gear 76, and main gear 80 can then be inserted into each of the rotating shafts, making the work easy.

A belt 88 is wound between the motor pulley 70 and the large pulley 74. Therefore, the rotational force of the loading motor 66 is reduced while the main gear 8
0 will be transmitted.

The main gear 80 is located on the right end surface of the tray 16.
It is adapted to mesh with a long rack 90 integrally molded with the tray 16 along the tray longitudinal direction.
However, a small rack 92 is integrally molded with the tray 16 at the front side slightly away from the tip of the long rack 90 and one step below the long rack 90 when viewed in the height direction, and there are several teeth that mesh with this small rack 92. Partial gear 9
4 is one step below the main gear 80.
(See Figure 8). Since the long rack 90 and the small rack 92 are separated from each other, when the main gear 80 is between the long rack 90 and the small rack 92, the rotation of the main gear 80 that does not drive the long rack 90 and therefore the tray 16 is prevented. forgiven. Further, as the main gear 80 rotates at this time, the partial gear 94 is next coupled to the small rack 92, so that the main gear 80 can drive the long rack 90 again.

Main gear 80 integrally equipped with partial gear 94
As shown in FIG. 8, a small-diameter sub-gear 96 is coaxially and integrally provided on the lower side of the gear. And, directly below the sub gear 96, separately from the main gear 80,
A trigger gear 98 having the same diameter as the sub gear 96 is provided. This trigger gear 98 has teeth formed on about 1/2 of its outer circumference. Furthermore, a protrusion 100 is provided at a predetermined location on the trigger gear 98 to protrude upward. Corresponding to the protrusion 100, two abutting members 102 and an abutting member 104 are formed in the radial direction inside the sub-gear 96 at predetermined positions close to each other.

In FIG. 1, the rotational force of the main gear 80 is transmitted to the trigger gear 98 only when the abutting member 102 or 104 presses against the protrusion 100.

A slider 106 is fitted to the rotating shaft 86 below the trigger gear 98 so as to be slidable horizontally in the front-rear direction. This slider 106 is the main body 108
is formed into a long plate shape, and has two long grooves 110 extending in the front-rear direction. One long groove 110 is fitted into the rotating shaft 86, and the other long groove 110
is the guide pin 1 installed upright on the main chassis 14.
12 is fitted. These long grooves 110, rotating shaft 86, and guide pins 112 cause the slider 1 to
06 movement will be guided. The main body 108 also includes a leaf switch 1 provided on the main chassis 14.
Two pins 118, 12 for actuating 16
It has 0.

The slider 106 is located at the bottom right of the rear end of the slider 106.
Legs 122 are provided to maintain the height. Further, a guide 124 is provided on the main chassis 14 on the left side of the rear end of the slider 106 to prevent the slider 106 from moving upward.

A rising portion 126 is formed at the left end of the slider 106 from the front end to slightly behind the center, and on the right side of this rising portion 126 is a first rack 12 that meshes with the sub gear 96 and trigger gear 98.
8, second rack 130 and first rack 128,
A trapezoidal tooth 132 is provided at the lower end portion between the second racks 130, projecting rightward and engaging the trigger gear 98. When the sub-gear 96 or the trigger gear 98 meshes with the first rack 128 or the second rack 130, the slider 106 moves back and forth under the rotational force of the sub-gear 96 or the trigger gear 98. On the other hand, when the teeth of the sub gear 96 or the trigger gear 98 come off the first rack 128 or the second rack 130, the movement of the slider 106 is temporarily stopped. Then, when the rotation of the trigger gear 98 progresses and the trigger gear 98 is coupled to the trapezoidal teeth 132, the slider 106
movement will be resumed.

The backward movement of the slider 106 is restricted by the guide pin 112 coming into contact with the end of the long groove 110.

An L-shaped bent portion 1 is provided at the rear end of the rising portion 126.
34, and an abutment member 136 is provided on the left side of the rear end of the rising portion 126 (see FIG. 2). The bent portion 134 is the clamp arm 1
This is to fit onto the collar 140 formed on the flange 38 to prevent the clamp arm 138 from slipping out after the disc 20 is clamped to the turntable 10. The contact member 136 also contacts a cam surface 142 formed at the lower end of the side surface of the clamp arm 138, and is used to rotate the clamp arm 138 up and down as the slider 106 moves. The cam surface 142 is connected to the front horizontal portion 14
4 and a rear slope portion 146, the contact member 1
The clamper 154 of the clamp arm 138 falls onto the turntable 10 while the clamp arm 36 is moving backward while contacting the slope portion 146, and the slider 106 then slides backward by a slight distance, and the contact member 13
6 is separated from the slope portion 146.

A notch groove 1 is located near the right rear end of the slider 106.
48 is formed, and when the slider 106 stops moving, a spring notch arm 150 provided in a cantilevered manner on the main chassis 14 engages to prevent the slider 106 from shifting.

During loading, the slider 106 configured as described above moves the lock arms 58 and 60 to lower the arm portion 32 provided on the tray 16 and lock the tray 16, and also lowers the clamp arm 138 to lower the disk 20. It functions as a driving source for clamping on the turntable 10.

A clamp arm 13 is mounted on the main chassis 14.
8 is pivotally supported so as to be rotatable up and down. This clamp arm 138 is formed into an L-shape when viewed from above, and has some flexibility as a whole. A circular opening 15 is located above the turntable 10 at the tip.
2, and a clamper 154 having a built-in magnet is locked in this opening 152 in a freely rotatable and loosely fitted state.

The clamp arm 138 has its left and right rear ends mounted on bearing columns 156 and 158 erected on the main chassis 14.
It is pivotally supported at a predetermined height by. and,
A tension coil spring 159 stretched between the left end and the main chassis 14 constantly urges the tip end to rotate downward. This causes the cam surface 142 to come into contact with the abutment member 136.

Further, the right side surface of the rear half of the clamp arm 138 falls down, and the aforementioned collar 140 and cam surface 142 are provided at the lower end (see FIG. 2).

When the slider 106 is located at the front and the abutment member 136 is in the middle of the horizontal portion 144, the clamper 154 is waiting above the turntable 10, and therefore moves the tray 16 to a predetermined position forward and above the turntable 10. can be moved between.
Furthermore, when the slider 106 moves back and forth with the abutting member 136 located halfway along the slope portion 146, the clamper 154 moves up and down between the upper standby position and the position directly above the turntable 10 with the disk 20 sandwiched therebetween. .

Note that the clamper 154 descends and the turntable 1
When the value approaches 0, the clamper 154 is attracted to the turntable 10 by magnetic force. Therefore, the disk 20 is reliably clamped. Conversely, even if a lifting force is applied to the clamper 154 from a state in which the clamper 154 is attracted to the turntable 10, the clamper 154 does not rise immediately, but leaves when the lifting force overcomes the attraction force.

The clamp arm 138 rotates slightly downward even after the clamper 154 is attracted to the turntable 10 via the disk 20, and the clamp arm 138 is released from being locked to the clamper 154.
The clamper 154 can rotate together with the turntable 10 without slidingly contacting the clamp arm 138. During this clamping, the height of the tip of the clamp arm 138 must be maintained at a predetermined value.
This contact may cause frictional noise, affect the number of rotations of the disc 20 during play, and deteriorate playback quality.

Here, the distance from the pivot point to the tip of the clamp arm 138 is long, and the clamp arm 138
Since the clamp arm 138 has some flexibility, it is difficult to maintain the tip of the clamp arm 138 at a predetermined height during clamping.

In this regard, the present embodiment has a simple configuration that allows the height of the tip of the clamp arm 138 to be adjusted during clamping. That is, the downward movement of the clamp arm 138 is finally started when the rising portion 160 as a contact portion protruding downward from the rear end of the clamp arm 138 comes into contact with the locking member 162 mounted on the main chassis 14.
It's becoming restricted. The height of the tip of the clamp arm 138 is determined by the contact position between the rising portion 160 and the locking member 162.

In order to be able to adjust this height, the locking member 162 is pivotally supported on the main chassis 14 so that it can rotate when a relatively large external force is applied with the vertical direction of the main chassis 14 as the rotation axis. , and a spiral cam surface 164 is formed in the circumferential direction of the locking member 162. Therefore, by turning the locking member 162 with a screwdriver or the like, it is possible to change the position in the front-rear direction of the lower end of the rising portion 160 when it comes into contact with the spiral cam surface 164.
The height of the tip of 8 can be easily adjusted. (See Figure 11).

A lock arm 5, which is driven by the slide of the slider 106, is provided in the rear half of the main chassis 14.
8.60 is equipped. Lock arm 58,
60 is formed in a substantially L-shape, and is rotatably supported by the main chassis 14 via a shaft 165 at the center of the upright side. The lock arm 60 is inserted into the long groove 166 formed at the end of the side of the lock arm 58.
A pin 168 formed at the tip of the side is fitted, forming a link, and when the lock arm 60 rotates, the lock arm 58 rotates via the link.

A tension coil spring 170 is tensioned between the lock arm 58 and the main chassis 14 and urges the lock arm 58 to rotate counterclockwise (therefore, the lock arm 60 rotates clockwise). A hook 62 is formed on the upper corner of each lock arm 58, 60, and is adapted to fit into the fitting hole 56 of the tray 16 and lock when loading is completed.

Also, a hemispherical projection 172 is provided as a hemispherical pressing portion on the left end of the rising edge of the lock arm 58 and on the right side of the lock arm 60 as well. This protrusion 172 is connected to the soft arms 26 and 2 provided on the tray 16 in response to the rotation of the lock arms 58 and 60.
This is for abutting and pressing outward against the abutment plate 40 of No. 8 to lower the arm portion 32.

A corner portion of the lock arm 60 projects to the right, and when the slider 106 comes into contact with this projecting portion 173, the lock arm 60 can rotate counterclockwise.

[Effect] Next, the operation of the above embodiment will be explained.

In advance, as shown in FIG. 1, the tray 16 is in a predetermined position in front, the clamp arm 138 is waiting upward, the slider 106 is in the front, and the lock arms 58 and 60 are in the counterclockwise and clockwise directions, respectively. It is assumed that he has returned. At this time, the arm portion 32 within the recess 22 protrudes upward due to the action of the compression coil spring 38. (See Figure 8).

When the disk 20 is placed on the rubber receiver 34 of the arm portion 32 and loading is started by operating a switch, the loading motor 66 rotates in the forward direction, which is biased and causes the main gear 80 and the sub gear 96 to rotate clockwise. The first rack 128, which is in mesh with the sub gear 96, is pushed rearward and the slider 10
6 moves backwards. In response to the movement of the first rack 128, the trigger gear 98 also rotates synchronously with the sub gear 96. By this backward movement toward the slider 106, the intermediate contact 176, which had been pushed toward the first contact 174 by the pin 118, is released and becomes a neutral position, cutting off contact with the first contact 174. However, the slider 106 moves slightly backward, and the intermediate point 176
When it reaches the neutral position, the sub gear 96 and the first rack 128 are disengaged, so the slider 106 temporarily stops moving. At this time, the notch arm 150 engages with the notch groove 148 to prevent the slider 106 from shifting due to unexpected external force. (See Figures 4 and 5).

Since the loading motor 66 continues to rotate normally, the main gear 80 is connected to the loading motor 6.
It rotates clockwise in response to the rotational force from 6. Therefore, the long rack 90 meshed with the main gear 80 moves rearward, and the tray 16 moves onto the main chassis 14. While the main gear 80 is rotating, the abutment member 102 provided on the sub-gear 96 rotates clockwise from the state shown in FIG. 4, comes into contact with the protrusion 100 after approximately 3/4 rotation, and then rotates the trigger gear 98 together. Then, the abutment member 102
When the trigger gear 98 is further rotated about half a turn after contact with the tray 16, the main gear 80 and the long rack 90 are disengaged, and at this time the tray 16 is positioned on the turntable 10 (see FIGS. 6 to 8).
At this time, the contact member 136 is still in contact with the horizontal portion 144.

On the other hand, when the main gear 80 and the long rack 90 are disengaged and the feeding of the tray 16 is stopped, the trigger gear 98 engages with the trapezoidal teeth 132 and the slider 106 is sent rearward again under the subsequent rotation of the main gear 80. Next, sub gear 96, trigger gear 9
8 engages with the second rack 130, the slider 106 is further moved rearward.

By this backward movement of the slider 106, the notch arm 150 first comes out of the notch groove 148. Then, the contact member 136 comes into contact with the slope portion 146, and the clamp arm 138 starts to descend under the force of the tension coil spring 159, and the left rear end of the slider 106 presses the protruding portion 173 and pulls it. The lock arm 60 is rotated counterclockwise against the coil spring 170, and the lock arm 58 is rotated clockwise via the link.

Then, by rotating the lock arms 58 and 60, the hook 6 is
2 is fitted into a fitting hole 56 provided in the main chassis 14 and locked. Also lock arm 58,6
The protrusion 172 at the tip of the 0 presses the backing plate 40 from the center side to the side, and moves the arm portion 32 downward against the compression coil spring 38. Therefore, the disc 20 is placed on the turntable 10.
On the other hand, the clamp arm 138 descends in synchronization with the operation of placing the disk 20 on the turntable 10, and almost at the same time as the disk 20 is placed on the turntable 10, the clamper 154 turns via the disk 20. It adsorbs to the table 10 and performs clamping.

This clamper operation stops the clamper 154 from descending, but the clamp arm 138 also descends a little and stops descending when the rising portion 160 is engaged with the locking member 162. As a result, clamp arm 1
38 and the clamper 154 are out of contact with each other, and rotation of the disk 20 during play is not hindered.

After the clamper of the disk 20 and the main chassis 14 are locked in this way, the pin 1
20 presses the intermediate contact 176 and the second contact 1
Loading motor 66 when it comes into contact with 78
rotation stops and the loading operation is completed (see FIGS. 9 to 13).

At this time, the partial gear 9 integrated with the main gear 80
4 is located a little less than half a turn away from the main chassis 14. After that, the optical pick-up is activated and the game is in play mode.

On the contrary, if you finish playing and use disk 20,
When removing the main gear 8, when the redirect key (not shown) is pressed, the loading motor 66 is reversed and the main gear 8 is
Rotate 0 counterclockwise. As the main gear 80 rotates, the sub gear 96 also rotates counterclockwise, moving the slider 106 forward via the second rack 130.

Therefore, the contact member 136 comes into contact with the slope portion 146 and pushes up the clamp arm 138 against the tension coil spring 159, causing the clamper 154 to unclamp the disk 20, and the action of the tension coil spring 170 to lock the lock arm 5.
8 and 60 are rotated counterclockwise and clockwise, respectively, the hook 62 is removed from the fitting hole 56, and the protrusion 1
72 escapes to the center side and the compression coil spring 38
As a result, the arm portion 32 rises and lifts the disk 20 onto the rubber receiver 34.

Then, when the main gear 80 has rotated a little less than about 1/2, the sub gear 96, the trigger gear 98, and the second rack 130 are disengaged, and the slider 106 temporarily stops moving. Shortly thereafter, partial gear 94 engages rack 92 of tray 16 and advances tray 16. As the tray 16 moves forward, the main gear 80 then begins to mesh with the long rack 90. Therefore, subsequent rotation of the main gear 80 causes the tray 16 to move forward.

After the slider 106 stops, the main gear 80
When the trigger gear 98 rotates about 3/4, the contact member 104 contacts the protrusion 100 and starts rotating the trigger gear 98.
When the main gear 80 has further rotated approximately 1/2 turn (when the tray 16 is near the front standby position), the trigger gear 98 engages with the trapezoidal teeth 132 and the slider 1
Advance 06. As the slider 106 moves forward, the first rack 128, sub gear 96, and trigger gear 98 mesh with each other, causing the slider 106 to move further forward. When the pin 118 brings the intermediate contact 176 into contact with the first contact 174, the rotation of the loading motor 66 is stopped and the anti-loading operation is completed.

In this way, the gears 80, 96, 98 and the racks 90, 92, 128, 130 that mesh with the gears,
Clamp arm 138 as tray 16 moves
In addition, the timing of the operation of the arm portion 32 can be adjusted.

[Effects of the invention] As explained above, in this invention, a clamper for clamping a disk placed on a turntable is loosely fitted to its tip, and is rotatably mounted on the main chassis. In a disk clamp device equipped with a clamp arm and a rotation drive mechanism that is provided on the main chassis and rotates the clamp arm when performing a clamping operation, the rear end of the clamp arm is provided protruding downward across a rotation shaft. A rising part is formed as an abutting part, and a locking part is provided on the main chassis with which the rising part abuts to limit the rotation of the clamp arm, and the locking part is rotatably provided with respect to the main chassis. In addition, a spiral surface is provided on the outer periphery, and the height of the tip of the clamp arm when clamping can be adjusted by rotating the locking part, so by simply rotating the locking part, the height of the tip of the clamp arm when clamping can be adjusted. Therefore, even if the machining accuracy and assembly accuracy of the entire clamp mechanism are not very high, it is possible to prevent the clamper from coming into contact with the arm, prevent the generation of friction noise, and ensure smooth rotation of the disk. It has the excellent effect of ensuring that

[Brief explanation of the drawing]

Fig. 1 is a plan perspective view showing the mechanical components of a CD player according to an embodiment of the present invention, Fig. 2 is a partially omitted schematic side view showing the loading drive section in Fig. 1, and Fig. 3. 1 is a partially omitted vertical cross-sectional perspective view mainly showing the clamp arm and turntable in FIG. 1, FIG. 5 is a schematic side view perspective view with a portion of FIG. 4 omitted, FIG. 6 is a plan perspective view for explaining the operation showing the state when the slider starts moving again, and FIG.
The figure is a partially omitted central cross-sectional perspective view of the state shown in Fig. 6, Fig. 8 is a partially omitted central cross-sectional perspective view of the state shown in Fig. 6, and Fig. 9 is a partially omitted central cross-sectional perspective view of the state shown in Fig. 6. FIGS. 10 and 11 are a partially omitted side perspective view and central vertical cross-sectional view of the state shown in FIG. 9, respectively, and FIG. 12 is a plan perspective view for explaining the operation in the state shown in FIG. 9. FIG. 13 is a partially omitted rear cross-sectional perspective view of the state shown in FIG. 9. DESCRIPTION OF SYMBOLS 10... Turntable, 14... Main chassis, 20... Disk, 64... Loading drive mechanism, 106... Slider, 138... Clamp arm, 154... Clamper, 160... Rising part, 162... Locking Member, 164... spiral cam surface.

Claims (1)

[Claims for Utility Model Registration] Disc 20 placed on turntable 10
A clamper 154 for clamping is loosely fitted to the tip of the clamp arm 138, which is rotatably mounted on the main chassis 14. In a disk clamp device equipped with a rotating rotation drive mechanism, a rising portion 160 is formed at the rear end of the clamp arm 138 as an abutting portion that protrudes downward across the rotation shaft, while the main chassis 14 A locking portion 162 is provided with which the rising portion 160 abuts to limit rotation of the clamp arm 138, and the locking portion 162 is rotatably provided with respect to the main chassis 14 and has a spiral surface 164 on its outer periphery. A disk clamp device characterized in that the height of the tip of a clamp arm 138 during clamping can be adjusted by rotating a stop portion 162.