CN1926620A - Chucking device - Google Patents

Abstract

A disk device, the clamping device is a clamping device in which a plurality of claw bodies movable in the radial direction of a hub body of a turntable are provided, and the hole in the center of the disk is pressed by the claw bodies to hold the disk, and the clamping device is characterized in that , providing an elastic member that loads the claw body outward relative to the hub body, the claw body has a claw portion that contacts the disk, and a claw side stopper that restricts outward movement caused by the elastic member The hub main body has a pawl opening through which the pawl can protrude outward, and a hub-side stopper in contact with the pawl-side stopper is provided at a position lower than the front end of the pawl. For the downward guiding surface, an upward receiving surface is provided on the aforementioned hub main body at a position facing the aforementioned downward guiding surface, and at least the first inclined surface and the second inclined surface constitute the aforementioned downward guiding surface When pushing the claws from above with the disk, when the front end of the claws is inserted into the center hole of the disk or until it is inserted into the near side of the center hole of the disk, the first inclined After the front end of the claw portion is inserted into the center hole of the disc, the second inclined surface is used as the surface in contact with the upward receiving surface, and the second inclined surface is used as the surface in contact with the upward receiving surface. Compared with the first inclined surface, the angle of the aforementioned second inclined surface relative to the pushing direction is relatively small.

Description

clamping device

technical field

The present invention relates to a disc device for recording or reproducing on a disc-shaped recording medium such as a CD or a DVD, and particularly relates to a clamping device suitable for a so-called slot-in type disc device in which a disc can be directly inserted or ejected directly from the outside. .

Background technique

Conventional disk devices often employ a loading method in which a disk is placed on a tray or turntable, and the tray or turntable is mounted in the device main body.

However, in this loading method, since a tray or a turntable is required, there is a limit in reducing the thickness of the disk drive main body.

On the other hand, as a suction-type disk device, it has been proposed to pull in a disk by bringing a transport roller into contact with the surface of the disk (for example, Patent Document 1).

(Patent Document 1)

Japanese Patent Application Publication No. 7-220353

However, for example, in the loading method proposed in Patent Document 1, since the conveying rollers longer than the disk diameter are used, the width of the apparatus has to be enlarged, and the thickness is also increased by the conveying rollers.

Therefore, it is difficult to reduce the thickness or size of the main body of the disk device in such a slot insertion type disk device.

On the other hand, in the conventional disk device, the disk holding surface of the claw portion is brought into contact with the upward receiving surface of the hub main body, and the disk holding surface of the claw portion is slid along the upward receiving surface of the hub main body, so that The main body of the claw moves in the horizontal direction and presses inward. Therefore, when the disk is inserted, the sliding operation of the claw body into the hub body requires a large load.

Therefore, an object of the present invention is to provide a clamp device that can reduce the load when a disk is inserted, and can perform stable operation in response to changes in the load.

Contents of the invention

The clamping device according to the first embodiment of the present invention is a clamp in which a plurality of claw bodies are provided so as to be movable in the radial direction of the hub body of the turntable, and the center hole of the disk is pressed by the claw bodies to hold the disk. A tightening device, wherein an elastic member is provided to load the pawl main body outward relative to the hub main body, the pawl main body has a pawl portion in contact with a disk and a pawl side stopper that restricts outward movement caused by the elastic member, the hub main body There is an opening for the claw from which the claw can protrude outward and a hub-side stopper that contacts the claw-side stopper, and a downward-facing guide surface is provided at a position lower than the front end of the claw. On the hub body at the position facing the downward guide surface, an upward receiving surface is provided, and when the claw is pushed from above, the downward guiding surface slides along the upward receiving surface, and the claw is directed inwardly. move.

According to this embodiment, by providing the downward guide surface on the claw portion, the sliding operation of the claw body into the hub body can be smoothly performed, and the load at the time of disk insertion can be reduced.

In the second embodiment of the present invention, in the clamping device according to the first embodiment, the surface facing downward from the front end of the claw portion is used as the disk holding surface, and the downward guiding surface is provided on the disk holding surface. the side.

According to this embodiment, compared with the case where the downward guide surface is provided below the claw part, the height of a claw part can be made low.

In a third embodiment of the present invention, in the clamping device according to the second embodiment, a downward-facing guide surface is provided on the claw body at a position higher than or at the same height as the disk holding surface.

According to this embodiment, the height of the claw main body can be reduced.

In a fourth embodiment of the present invention, in the clamping device according to the third embodiment, the outer end of the upward-facing guide surface is higher than the upward-facing guide surface, and the downward-facing guide surface A part is set on the part.

According to this embodiment, the height of the claw main body can be further reduced.

According to a fifth embodiment of the present invention, in the clamping device according to the first embodiment, at least the first inclined surface and the second inclined surface constitute a downward guide surface, and when the claw is pushed from the upper part by a disc, When the front end of the claw is inserted into the central hole of the disk or just before being inserted into the central hole of the disk, the first inclined surface is used as the surface in contact with the upward receiving surface, and the front end of the claw is inserted into the After reaching the center hole of the disk, the second inclined surface is used as the surface in contact with the upward receiving surface, and the angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface.

According to this embodiment, the load at the time of disk insertion can be reduced, and at the same time, it is possible to adapt to fluctuations in the load and perform stable operation.

According to a sixth embodiment of the present invention, in the clamping device according to the first embodiment, an inner side guide composed of an inclined surface that gradually becomes higher toward the center of the hub body is provided on the inner side of the claw body. At least the first inclined surface and the second inclined surface constitute the inner side guide surface. When the claw is pushed from the upper part by the disk, when the front end of the claw is inserted into the central hole of the disk or is about to be inserted into Before the central hole of the disk, the first inclined surface is used as the surface that contacts the claw side stopper, and after the front end of the claw is inserted into the central hole of the disk, the second inclined surface is used as the surface that contacts the claw side stopper. As for the contact surface, the angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface.

According to this embodiment, it is possible to adapt to fluctuations in the load and perform stable operation.

According to a seventh embodiment of the present invention, in the clamping device according to the fifth embodiment, the first inclined surface of the downward guiding surface is formed of a circular arc surface, and the second inclined surface of the downward guiding surface is formed of a flat surface. sloped surface.

According to this embodiment, the pushing operation of the disk can be performed stably, and at the same time, after the tip of the claw is inserted into the center hole of the disk, the tip of the claw can be smoothly raised.

According to an eighth embodiment of the present invention, in the clamping device according to the first embodiment, at least the first inclined surface and the second inclined surface form an upward receiving surface, when the claw is pushed from the upper part by the disc , when the front end of the claw is inserted into the central hole of the disc or just before it is inserted into the central hole of the disc, the first inclined surface is used as the surface in contact with the downward guide surface, and the front end of the claw is inserted into the After reaching the central hole of the disk, the second inclined surface is used as the surface that contacts the downward guide surface, and the angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface.

According to this embodiment, the load at the time of disc insertion can be reduced, and at the same time, it is possible to adapt to fluctuations in the load and perform stable operation.

In a ninth embodiment of the present invention, in the clamping device according to the first embodiment, the surface facing downward from the front end of the claw is used as the disk holding surface, and the downward guiding surface is provided on the disk holding surface. In the side part, a downward guide surface is provided on the claw body at a position higher than or at the same height as the disk holding surface, and a downward receiving surface is provided on the hub body at a position facing the upward guide surface , the openings for the claws are provided in the range from the outer periphery of the upper surface of the hub main body to the side surfaces, and the width of the openings on the side surfaces is larger than the width of the upper surface openings in the outer periphery of the upper surface of the openings for the claws. The downward receiving surface is arranged under the both sides of the upper surface opening, and the upward receiving surface is arranged above the both sides of the side opening.

According to this embodiment, compared with the case where the downward guide surface is provided below the claw portion, the height of the claw main body can be reduced, and at the same time, the outer dimension of the hub main body can be reduced.

In a tenth embodiment of the present invention, in the clamping device according to the ninth embodiment, each upward receiving surface provided on both sides of the side opening is connected by the hub main body, and each upward receiving surface The configuration disc keeps the surface between.

According to this embodiment, the hub body can be formed smaller than the disc center hole.

In an eleventh embodiment of the present invention, in the clamping device according to the ninth embodiment, a coil spring is used as the elastic member, and the contact position of the pawl-side stopper and the hub-side stopper is set at the position of the coil spring. below the centerline.

According to this embodiment, in the standby state where the disc is not held by the claws, the coil spring can be biased downward by the tips of the claws.

In a twelfth embodiment of the present invention, in the clamp device according to the tenth embodiment, the contact position of the pawl-side stopper and the hub-side stopper is provided inwardly of the pawl.

According to this embodiment, by setting the contact position of the pawl-side stopper and the hub-side stopper on the inner side of the pawl part, there is no obstacle on the outside of the pawl part, and the The claw portion is fully lowered downward.

In a thirteenth embodiment of the present invention, in the clamping device according to the tenth embodiment, the claw-side stopper is provided on the side of the claw.

According to this embodiment, the height of the claw can be reduced compared to the case where the claw-side stopper is provided below the claw.

According to the fourteenth embodiment of the present invention, in the clamping device of the ninth embodiment, in the recording and reproducing state where the disk is held by the claws, when the thickness of the disk is thin, the thickness of the disk is the same as that of the case of thick disk. ratio, the claws move outward, and at the same time, the position of the claws becomes lower.

According to this embodiment, even if the movement stroke of the claw main body in the radial direction of the hub main body is increased corresponding to the disc thickness variation, the height of the claw can be kept low.

According to a fifteenth embodiment of the present invention, in the clamping device according to the fourteenth embodiment, the upward guide surface provided on the front side of the claw main body and the position facing the upward guide surface The downward receiving surface of the hub main body is provided with a slope that becomes lower on the front side.

According to this embodiment, the length of the disk pressing surface of the claw main body can be shortened, and the height of the claw can be controlled to be low.

In a sixteenth embodiment of the present invention, in the clamping device according to the ninth embodiment, compared with the contact portion of the lower end portion of the claw main body with the lower member in the standby state where the disk is not held by the claw , set the claw side stopper that restricts the outward movement caused by the elastic member of the claw body on the front side, and the hub side stopper that is in contact with the claw side stopper as an inclined surface on the lower side near the front side .

According to this embodiment, the front end portion of the claw main body in the standby state can be lowered, and the height space for disk insertion above the turntable can be reduced.

According to the seventeenth embodiment of the present invention, in the clamping device according to the fourteenth embodiment, the downward guiding surface is provided below the front end of the claw portion, and the upward receiving surface is provided On the hub main body at the position facing the downward guide surface, at least the first inclined surface and the second inclined surface constitute the downward guide surface, and when the claw is pushed from the upper part by the disc, the When the front end is inserted into the central hole of the disc or immediately before being inserted into the central hole of the disc, the first inclined surface is used as the surface in contact with the upward receiving surface, and the front end of the claw is inserted into the central hole of the disc. Afterwards, the second inclined surface is used as the surface in contact with the upward receiving surface, and the angle of the second inclined surface with respect to the pushing direction is smaller than that of the first inclined surface, and by pressing the claw from the upper part, the downward facing The guide surface slides along the upward receiving surface, and the claw moves inwardly.

According to this embodiment, it is possible to adapt to fluctuations in the load and perform stable operation.

In an eighteenth embodiment of the present invention, in the clamping device according to the fourteenth embodiment, a coil spring is used as the elastic member, and the contact position between the pawl side stopper and the hub side stopper is set on the coil spring. Below the center line of the claw, and at the same time set inside the claw.

According to this embodiment, the front end of the claw portion can bias the coil spring downward.

The disk drive according to the nineteenth embodiment of the present invention adopts the clamping device according to the first to eighteenth embodiments, wherein the casing outer package is formed by the base body and the cover body, and the casing outer package The front of the disc is formed with a disk insertion port directly inserted into the disk, and the spindle motor and pickup are held by a beam arranged on the base body, and a turntable is arranged above the spindle motor to make the beam close to and away from the base body.

According to this embodiment, the load when the disk is inserted can be reduced, and at the same time, it can adapt to the fluctuation of the load and perform stable operation. Therefore, it is suitable for the so-called slot-in type disk device that can directly insert the disk from the outside or directly eject the disk.

Description of drawings

FIG. 1 is a top side perspective view of a hub body of a clamping device according to one embodiment of the present invention.

Figure 2 is a bottom side perspective view of the hub body.

Fig. 3 is a front view of the hub body.

Figure 4 is a rear view of the hub body.

Fig. 5 is a side view of the hub body.

Fig. 6 is a sectional view taken along line A-A in Fig. 3 .

Fig. 7 is a B-B sectional view in Fig. 3 .

Fig. 8 is a lower side perspective view of the claw main body of the clamp device according to the present embodiment.

Fig. 9 is a top outer side perspective view of the claw main body.

Fig. 10 is a top inside side perspective view of the claw main body.

Fig. 11 is a side view of the claw body.

Fig. 12 is a side sectional view of the claw body.

Fig. 13 is a front view of the claw main body.

Figure 14 is a rear view of the claw body.

15 is a cross-sectional view of a main part of the clamp device in a standby state or a state immediately after a disk is inserted into the disk device.

Fig. 16 is a sectional view of a main part of the clamp device, showing a state in which the clamp device has been raised by a predetermined distance on the disk side from the state of Fig. 15 .

Fig. 17 is a sectional view of main parts of the clamp device showing a state in which the tip of the claw is inserted into the center hole of the disc.

Fig. 18 is a sectional view of a main part of the clamp device, showing a state in which the clamp device has been raised by a predetermined distance on the disk side from the state of Fig. 17 .

Fig. 19 is a sectional view of a main part of the clamp device showing a state after a predetermined time has elapsed from the state of Fig. 18 .

Fig. 20 is a sectional view of a main part of the clamp device showing a state after a predetermined time has elapsed from the state of Fig. 19 .

Fig. 21 is a sectional view of main parts of the clamping device showing a state where the clamping of a thin disc is completed.

Fig. 22 is a cross-sectional view of the main part of the clamping device showing a state in which a medium-thick disk has been clamped.

Fig. 23 is a sectional view of main parts of the clamping device showing a state in which the thick disc is clamped.

Fig. 24 is a main part plan view of the chassis main body of the disk device according to the present embodiment.

Fig. 25 is a side sectional view of a main part of the disk device.

Fig. 26 is a side view of a sub slider of the disk device.

27 is a plan view of a main part of the chassis main body showing a state in which a first predetermined time has elapsed since the disc clamping operation of the disc device according to the present embodiment has elapsed.

Fig. 28 is a side sectional view of main parts in this state.

Fig. 29 is a side view of the sub-slider in this state.

30 is a plan view of main parts of the base body in a state where a second predetermined time has elapsed from the state in FIG. 4 .

Fig. 31 is a side sectional view of main parts in this state.

Fig. 32 is a side view of the sub-slider in this state.

Fig. 33 is a plan view of main parts of the base body showing a state in which the beam has risen to the highest position after a third predetermined time has elapsed from the state in Fig. 7 .

Fig. 34 is a side sectional view of main parts in this state.

Fig. 35 is a side sectional view of the sub-slider in this state.

36 is a plan view of main parts of the main body of the chassis, showing the recording and reproduction state of the disc after a fourth predetermined time has elapsed from the state of FIG. 10 .

Fig. 37 is a side sectional view of main parts in this state.

Fig. 38 is a side view of the sub-slider in this state.

Detailed ways

Next, a clamping device according to an embodiment of the present invention will be described.

First, the hub main body constituting the clamp device according to the present embodiment will be described.

1 is an upper side perspective view of a hub body of a clamping device according to the present embodiment, FIG. 2 is a lower side perspective view of the hub body, FIG. 3 is a front view of the hub body, and FIG. 4 is a rear view of the hub body. 5 is a side view of the hub main body, FIG. 6 is a sectional view of A-A in FIG. 3 , and FIG. 7 is a sectional view of B-B in FIG. 3 .

The hub body 150 of the turntable is formed into a dish shape by a disc-shaped upper surface 151 and side surfaces 152 erected on the outer periphery of the upper surface 151 . In the center portion of the upper surface 151, a motor shaft hole 153 is formed to engage with the rotation shaft of the spindle motor.

Three pawl openings 154 are radially provided on the hub main body 150 . These claw openings 154 are provided in a range from the outer periphery of the upper surface 151 to the side surface 152 such that the width of the side opening in the side surface 152 is larger than that of the upper surface opening on the outer periphery of the upper surface 151 .

On the back side of the hub main body 150 , three coil spring stoppers 155 protruding on the outer periphery of the annular rib 153A forming the hole 153 for the motor shaft are provided. These coil spring stoppers 155 are provided radially toward the pawl opening 154 .

In addition, on the back side of the hub main body 150 , a plurality of connection ribs 150A that connect the annular rib 153A and the side surface 152 are provided. In addition, a pair of connection ribs 150A are arranged so as to isolate the space including one coil spring stopper 155 and the pawl opening 154 located in the axial direction of the coil spring stopper 155 from other spaces. There is a claw accommodating space 150B of the claw main body 170 .

On the opposing inner peripheral surfaces of the pair of connecting ribs forming the claw accommodating space 150B, there are provided: a hub-side stopper 156A; The inner side guide surface 156 is composed of an inclined surface whose center gradually becomes higher. The inner side guide surface 156 is constituted by at least a first inclined surface and a second inclined surface.

On the other hand, on the upper surface of both sides of the claw opening 154 in the side surface 152, an upward receiving surface 157 is formed, and on the lower surface of both sides of the claw opening 154 in the upper surface 151, a receiving surface 157 is formed. Downward receiving surface 158 . The upward receiving surface 157 is at least composed of a first inclined surface and a second inclined surface.

Next, the claw main body constituting the clamp device according to the present embodiment will be described.

8 is a perspective view of the lower side of the claw main body of the clamping device according to the present embodiment, FIG. 9 is a perspective view of the upper outer side of the claw main body, FIG. 10 is a perspective view of the upper inner side of the claw main body, and FIG. 11 12 is a side view of the claw body, FIG. 13 is a front view of the claw body, and FIG. 14 is a rear view of the claw body.

The claw body 170 is composed of a claw portion 171 and guide portions 172 disposed on both sides of the claw portion 171 .

When the claw portion 171 is attached to the hub body 150, it is composed of: a front end portion 171A located on the outermost periphery of the hub body 150; an upper surface 171B formed of a flat surface connected to the front end portion 171A; Below the front end portion 171A, there is a disk holding surface 171C in contact with the disk center hole. In addition, a tapered surface 171D is provided inside the upper surface 171B.

Inside the claw portion 171, a rear end surface 173 in contact with the coil spring is formed, and a coil spring stopper 175 formed of a protrusion is provided on the rear end surface 173. As shown in FIG. In addition, a concave portion 173A is formed around the upper side of the coil spring stopper 175 in the rear end surface 173 . By providing the concave portion 173A on the rear end surface 173 where the upper portion of the coil spring contacts, the angle of the surface (recess 173A) that the upper portion of the coil spring contacts is different from the surface (rear end surface 173 ) that the lower portion of the coil spring contacts.

And, in a state where the upper portion of the coil spring is in contact with the concave portion 173A of the rear end surface 173 , the surface of the concave portion 173A is perpendicular to the center line of the coil spring.

The lower end surface 174 of the guide portion 172 is formed in an arc shape. In addition, a pawl-side stopper 176 is provided to project sideways inside the guide portion 172 .

On the side of the outer claw portion 171 as the guide portion 172, a downward-facing guide surface 177 is provided at a position lower than the front end portion 171A of the claw portion 171, and an upward-facing guide surface 177 is provided at a position higher than the disk holding surface 171C. guide surface 178 . In addition, in the state where the claw main body 170 is mounted on the hub main body 150, the downward guide surface 177 is disposed at a position facing the upward receiving surface 157, and the downward guide surface 177 is pushed by pressing the claw portion 170 from above. 177 slides along the receiving surface 157 facing upwards. In addition, when the pawl main body 170 is attached to the hub main body 150 , the upward guiding surface 178 is disposed at a position facing the downward receiving surface 158 . In addition, the outer end portion of the upward guide surface 178 is made higher than the upward guide surface 178 . In addition, the downward guide surface 177 is constituted by at least a first inclined surface and a second inclined surface.

Next, the more detailed structure and clamping action of the clamping device according to this embodiment will be described using FIGS. 15 to 20 .

15 is a cross-sectional view of a main part of the clamp device, showing a standby state or a state immediately after a disk is inserted into the disk device.

The hub main body 150 is provided at the central portion of the upper surface of the spindle motor 31A. Furthermore, the claw main body 170 is disposed between the hub main body 150 and the rotor-side receiving surface 31B of the spindle motor 31A.

Between the coil spring stopper 155 of the hub main body 150 and the coil spring stopper 175 of the pawl main body 170 , a coil spring 180 as an elastic member is provided. That is, the pawl main body 170 is biased outward of the hub main body 150 by the coil spring 180 . The coil spring 180 is provided such that the outer end on the coil spring stopper 175 side is positioned below the inner end on the coil spring stopper 155 side.

In addition, the pawl-side stopper 176 is brought into contact with the hub-side stopper 156A so that the pawl main body 170 does not protrude outward. Here, the contact position between the claw side stopper 176 and the hub side stopper 156A is located inward of the hub main body 150 relative to the claw portion 171 and below the center line of the coil spring 180 .

As shown in FIG. 15 , the claw portion 171 of the claw body 170 is disposed below the height of the upper surface 151 of the hub 150 in a state immediately after the disk is inserted into the disk device. In addition, the upper portion of the outer end portion of the coil spring 180 is in contact with the recessed portion 173A of the rear end surface 173 . The same applies to the standby state in which no disk is inserted.

16 is a cross-sectional view of a main part of the clamp device, showing a state in which the clamp device has been raised by a predetermined distance toward the disc side from the state shown in FIG. 15 .

As the clamp rises, the claw portion 171 is pushed by the disk from the upper surface 171B.

In this way, by pressing the claw portion 171 from the upper surface 171B, the claw side stopper 176 slides along the inner side guide surface 156 . That is, the pawl-side stopper 176 slides toward the inside of the hub main body 150 so as to gradually become higher. On the other hand, simultaneously with the movement of the pawl-side stopper 176 , the downward-facing guide surface 177 slides along the upward-facing receiving surface 157 . Therefore, the claw main body 170 moves inwardly of the hub main body 150 by the sliding of the claw side stopper 176 and the downward guide surface 177 . In addition, by pressing claw portion 171 from upper surface 171B, the upper portion of the outer end of coil spring 180 is separated from recess 173A of rear end surface 173 , and the lower portion of the outer end of coil spring 180 is in contact with rear end surface 173 .

17 is a cross-sectional view of the main part of the clamping device showing a state in which the front end portion of the claw is inserted into the center hole of the disk, and FIG. 19 is a sectional view of a main part of the clamp device showing a state after a predetermined period of time has elapsed from the state of FIG. 18 .

FIG. 17 shows a state where the tip portion 171A of the claw portion 171 is inserted into the center hole of the disk. Then, when the clamping device is further raised toward the disk side from the state shown in FIG. 17 , as shown in FIG. 18 , the tip portion 171A of the claw portion 171 slides along the inner peripheral surface of the center hole of the disk. In this embodiment, the disc-side lift caused by the interaction of the jaws 171 of the clamping device with the hub body 150 reaches the position shown in FIG. 18 . The position shown in FIG. 18, that is, in the critical state of the rise to the disk side caused by the mutual relationship between the claw portion 171 and the hub body 150, the downward guide surface 177 of the claw portion 171 and the upward facing hub body 150 The guide surface 157 is in contact, the lower end surface 174 of the claw portion 171 is in contact with the rotor-side receiving surface 31B, and the tip portion 171A of the claw portion 171 is in contact with the inner peripheral surface of the disc center hole. By appropriately setting the biasing force of the coil spring 180 or the relationship between the frictional resistance between the front end portion 171A of the claw portion 171 and the disk, the clamping device is not operated from the state of FIG. 18 , and the front end portion of the claw portion 171 171A slides on the inner wall of the central hole of the disc. In movement from the position shown in FIG. 18 , the downwardly facing guide surface 177 of the claw portion 171 is separated from the upwardly facing guide surface 157 of the hub body 150 . Then, when the tip portion 171A of the holding claw portion 171 is kept in contact with the inner peripheral surface of the disc center hole, the tip portion 171A moves upward little by little on the inner peripheral surface of the disc center hole. On the other hand, when the contact between the lower end surface 174 of the claw portion 171 and the rotor-side receiving surface 31B remains unchanged, the contact point between the lower end surface 174 and the receiving surface 31B moves inward little by little.

Here, the inner side guide surface 156 is constituted by at least a first inclined surface and a second inclined surface as described above. When the claw portion 171 is pushed from the upper part by the disk, when the front end portion 171A of the claw portion 171 is inserted into the center hole portion of the disk, or just before being inserted into the center hole portion of the disk, the first inclined surface is a claw side stopper. The surface that the member 176 contacts is the surface that the claw side stopper 176 contacts after the front end portion 171A of the claw portion 171 is inserted into the central hole portion of the disk, and the second inclined surface. The angle of the second inclined surface with respect to the pressing direction is relatively smaller than that of the first inclined surface.

On the other hand, the downward guide surface 177 is constituted by at least a first inclined surface and a second inclined surface as described above. When the front end portion 171A of the claw portion 171 is inserted into the central hole portion of the disk or just before being inserted into the central hole portion of the disk, the first inclined surface is a surface in contact with the upward receiving surface 157, and the front end portion of the claw portion 171 After 171A is inserted into the central hole of the disk, the second inclined surface is a surface that contacts the upward receiving surface 157 . The angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface. Furthermore, for example, the first inclined surface of the downward guiding surface 177 is formed of an arcuate surface, and the second inclined surface of the downward guiding surface 177 is formed of a flat surface.

In this way, by constituting the inner side guide surface 156 and the downward guide surface 177 by using the first inclined surface and the second inclined surface, especially the front end portion 171A of the claw portion 171 from the state shown in FIG. 18 can be stably moved. Slip with the inner wall of the center hole of the disc.

In addition, the upward receiving surface 157 is constituted by at least a first inclined surface and a second inclined surface as described above. When the front end portion 171A of the claw portion 171 is inserted into the central hole portion of the disk or immediately before being inserted into the central hole portion of the disk, the first inclined surface is a surface that contacts the downward guide surface 177 , and the front end portion 171A of the claw portion 171 After being inserted into the central hole portion of the disk, the second inclined surface is a surface that contacts the downward-facing guide surface 177 . The angle of the second inclined surface with respect to the pressing direction is relatively smaller than that of the first inclined surface. Also, for example, the first inclined surface of the upward receiving surface 157 is formed of an arcuate surface, and the second inclined surface of the upward receiving surface 177 is formed of a flat surface.

In this way, by constituting the upward receiving surface 157 by the first inclined surface and the second inclined surface, especially the front end portion 171A of the claw portion 171 from the state shown in FIG. slide.

Fig. 20 is a sectional view of a main part of the clamp device showing a state after a predetermined time has elapsed from the state shown in Fig. 19 .

In FIG. 20 , the front end portion 171A of the claw portion 171 protrudes beyond the upper surface of the disk, indicating that the clamping is completed and the recording and reproduction state has been entered.

When the clamping is completed, the upper portion of the outer end portion of the coil spring 180 is in contact with the concave portion 173A of the rear end surface 173 . In addition, the claw portion 171 is positioned higher than the upper surface 151 of the hub body 150 . In the clamped state, the disk holding surface 171C of the claw portion 171 is in contact with the upper end of the disk center hole, and the front end portion 171A of the claw portion 171 protrudes to the outer peripheral side of the disk center hole, and at the same time protrudes above the upper surface of the disk. . On the other hand, the upward guide surface 178 of the claw portion 171 is in contact with the downward receiving surface 158 of the hub, and the lower end surface 174 of the claw portion 171 is in contact with the rotor side receiving surface 31B.

Next, the clamping operation of discs having different thicknesses will be described with reference to FIGS. 21 to 23 .

Fig. 21 is a sectional view of main parts of the clamping device showing a state in which a thin disk has been clamped, and Fig. 22 is a sectional view of a main part of the clamping device showing a state in which a disk of a medium thickness has been clamped. It is a sectional view of main parts of the clamping device showing the state when the clamping of the thick disc is completed.

When the thickness of the disk shown in FIG. 21 is thin, compared with the case where the thickness of the disk shown in FIG. The position of the portion 171A becomes lower. In addition, when the thickness of the disk shown in FIG. 22 is moderate, compared with the case where the thickness of the disk shown in FIG. The position of the front end portion 171A becomes lower. Thus, according to the present embodiment, even if the movement stroke of the claw main body 170 in the radial direction of the hub main body 150 is increased in accordance with the disc thickness variation, the height of the claw can be kept low.

Next, a disk device using the clamping device according to this embodiment will be described.

24 is a main part plan view of the chassis main body of the disk device according to this embodiment, FIG. 25 is a side sectional view of the main part of the disk device, and FIG. 26 is a side view of a sub-slider of the disk device.

According to the disk drive of the present embodiment, the chassis case is constituted by the base body and the cover body, and the front cover is attached to the front surface of the chassis case. The disk drive according to this embodiment is a slot-in type disk drive in which a disk is directly inserted through a disk insertion opening provided on the front cover.

On the front side of the chassis main body 10, a disk insertion opening 11 into which a disk is directly inserted is formed. The beam 30 is arranged on the base main body 10 .

The beam 30 holds a spindle motor 31A, a pickup 32 , and a drive mechanism 33 for moving the pickup 32 . On the rotation shaft of the spindle motor 31A, a hub main body 150 holding a disk is provided. The spindle motor 31A is provided on one end side of the beam 30, and the pickup 32 is arranged on the other end side of the beam 30 in the standby state and the clamped state. The pickup 32 is provided so as to be able to move from one end side to the other end side of the beam 30 . The drive mechanism 33 has: a drive motor, a pair of guide rails for sliding the pick-up 32, a gear mechanism for transmitting the driving of the drive motor to the pick-up 32, and a pair of guide rails are arranged on both sides of the pick-up 32 so that One end side of the beam 30 is connected to the other end side.

On the beam 30, the spindle motor 31A is located at the central portion of the base body 10, and the reciprocating range of the pickup 32 is located on the side of the disk insertion port compared with the spindle motor 31A, and the reciprocating direction of the pickup 32 is arranged to The direction of insertion is different from that of the disc. Here, the reciprocating direction of the pickup 32 and the disk insertion direction form an angle of 40 to 45 degrees.

The beam 30 is supported by the base main body 10 by a pair of fixed cams 34A, 34B. Preferably, the pair of fixed cams 34A, 34B are disposed closer to the pickup 32 than the spindle motor 31A, and closer to the disk insertion port 11 than the standby position of the pickup 32 . In this embodiment, the fixed cam 34A is provided at the center near the inner side of the disk insertion opening 11 , and the fixed cam 34B is provided at one end side near the inner side of the disk insertion opening 11 . The fixed cams 34A, 34B are constituted by grooves of a predetermined length extending along the disk insertion direction, and the end of the groove on the side of the disk insertion opening 11 is separated from the base main body 10 by the first Y axis from the end of the other end. distance. By sliding the cam pins 35A, 35B provided on the crossbeam 30 in the grooves of the fixed cams 34A, 34B, the crossbeam 30 can be displaced along the disk insertion and discharge direction (X-axis direction), and at the same time, can also move toward or away from the base. The direction (Z-axis direction) of the main body 10 is displaced.

Next, the main slider 40 and the sub-slider 50 that operate the beam 30 will be described.

The main slider 40 and the sub-slider 50 are arranged so as to be located on the side of the spindle motor 31A. The main slider 40 is arranged in such a direction that one end becomes the front side of the chassis body 10 and the other end becomes the rear side of the chassis body 10 . In addition, the sub-slider 50 is arranged along a direction perpendicular to the main slider 40 .

The cam mechanism for displacing the beam 30 is composed of a slider cam mechanism 51 and a lift cam mechanism 52 , and is provided on the sub-slider 50 . The slider cam mechanism 51 is constituted by a groove of a predetermined length extending along the moving direction of the sub-slider 50, and the groove approaches the disk in stages from its one end side (main slider 40 side) end to the other end side end. The direction of the insertion port 11 (X-axis direction). The slide pin 53 provided on the beam 30 can displace the beam 30 in the disk insertion and ejection direction (X-axis direction) by sliding in the groove of the slider cam mechanism 51 . In addition, the elevating cam mechanism 52 is constituted by a groove of a predetermined length extending along the moving direction of the sub-slider 50, and the groove is aligned with the base main body from the end on one end (on the side of the main slider 40) to the end on the other end. The distance of 10 (Z-axis distance) changes in stages. The elevating pin 54 provided on the beam 30 can displace the beam 30 in the direction (Z-axis direction) approaching and away from the base main body 10 by sliding in the groove of the elevating cam mechanism 52 .

A loading motor (not shown) is disposed on one end side of the main slider 40 . And, the drive shaft of this loading motor is connected to one end side of the main slider 40 via a gear mechanism (not shown).

Driven by this loading motor, the main slider 40 can be slid in the longitudinal direction (X-axis direction). In addition, the main slider 40 is connected with the sub-slider 50 via a cam lever 70 .

The cam lever 70 has a rotation fulcrum 71 , and a pin 72 is used to cooperate with the cam groove 41 provided on the main slider 40 , and a pin 74 is used to cooperate with the cam groove provided on the auxiliary slider 50 .

The cam lever 70 has the function of moving the sub-slider 50 in conjunction with the movement of the main slider 40. Through the movement of the sub-slider 50, the slider cam mechanism 51 and the lifting cam mechanism 52 are activated to make the beam 30 move. displacement.

In addition, the beam 30 is further supported by the base main body 10 via a pair of fixed cams 36A, 36B. The pair of fixed cams 36A, 36B is disposed between the fixed cams 34A, 34B and the sub-slider 50 , preferably at an intermediate position between the fixed cams 34A, 34B and the sub-slider 50 . The fixed cams 36A, 36B are constituted by grooves having a predetermined length having the same structure as the fixed cams 34A, 34B. By sliding the cam pins 37A, 37B provided on the crossbeam 30 in the grooves of the fixed cams 36A, 36B, the crossbeam 30 is displaced in the disk insertion direction, and at the same time, it can be displaced in a direction approaching and away from the base 10 .

The above-described beam 30 , fixed cams 34A, 34B, 36A, 36B, main slider 40 , sub-slider 50 , and loading motor are provided on the base body 10 , and a disk insertion space is formed between these members and the cover 130 .

Next, a guide member for supporting the disk and a lever member for moving the disk will be described.

On one end side of the base body 10 in the vicinity of the disk insertion port 11, a first disk guide (not shown) having a predetermined length is provided. The first disk guide has a U-shaped groove in a cross section viewed from the disk insertion direction. The disc is supported by means of this groove.

On the other hand, on the other end side of the chassis main body 10 near the disk insertion port 11 , a pull-in rod 80 is provided, and a second disk guide 81 is provided at the movable-side end of the pull-in rod 80 . The second disk guide 81 is formed of a cylindrical roller and is rotatably provided at the movable side end of the pull-in rod 80 . In addition, a groove is formed on the outer periphery of the roller of the second disk guide 81, and the disk is supported by the groove.

The pull-in lever 80 is arranged so that the movable-side end moves closer to the disk insertion port 11 than the fixed-side end, and has a pivot fulcrum 82 at the fixed-side end. In addition, a third disk guide 84 having a predetermined length is provided between the movable-side end and the fixed-side end of the pull-in rod 80 . In addition, the pull-in lever 80 is provided with a pin 85 , and when the pin 85 slides in the cam groove 42 of the main slider 40 , the pull-in lever 80 moves. That is, as the pull-in lever 80 moves along with the main slider 40 , the second disk guide 81 moves toward and away from the spindle motor 31A.

In addition, a discharge rod 100 is provided on the base body 10 . A guide 101 is provided at a movable-side end portion on one end side of the discharge rod 100 . In addition, a pivot fulcrum 102 is provided on the other end side of the discharge rod 100 . In addition, the discharge lever 100 operates in conjunction with the movement of the main slider 40 via the pin 103 and the cam groove 43 .

In addition, a discharge rod 110 is provided on a side facing the discharge rod 100 of the base body 10 . A guide 111 is provided at a movable-side end portion of one end side of the discharge rod 110 . In addition, a pivot fulcrum 112 is provided on the other end side of the discharge rod 110 . In addition, the discharge rod 110 operates in the same manner as the discharge rod 100 .

On the other hand, a fixing pin 120 is provided at the rear side of the base main body 10 . The fixing pin 120 regulates the position of the disk when loading or clamping the disk.

As shown in FIG. 25 , the casing package is composed of a base body 10 and a cover 130 , and an opening 132 is provided in the center of the cover 130 . The opening 132 is a circular opening with a radius larger than the center hole of the disc. Thus, there is a larger opening than the hub main body 150 of the spindle motor 31A fitted to the center hole of the disc.

A constricted portion 133 protruding to the base body 10 side is formed on the outer peripheral portion of the opening portion 132 .

Next, the operation mechanism of the beam 30 will be described using FIGS. 24 to 38 .

The positions of the cam mechanism and the pins in FIGS. 24 to 26 represent the state in which the disk has been loaded.

27 is a plan view of main parts of the base body 10 in a state where the first predetermined time has elapsed since the disk clamping operation of the disk device, FIG. 28 is a side sectional view of main parts in this state, and FIG. 29 is a side view in this state. Side view of the slider.

In addition, FIG. 30 is a plan view of main parts of the base body in a state where a second predetermined time has elapsed from the state of FIG. 27 , FIG. 31 is a side sectional view of main parts in this state, and FIG. 32 is a sub-slider in this state. side view.

In addition, FIG. 33 is a plan view of main parts of the base body in a state where the crossbeam has risen to the highest state after a third predetermined time has passed from the state of FIG. 30. FIG. 34 is a side sectional view of main parts in this state. FIG. Side view of the secondary slide in the state.

And FIG. 36 is a main part plan view of the main part of the base main body showing the fourth predetermined time from the state of FIG. 33 and the recording and reproduction state of the disk. Side view of the secondary slide.

First, in the state where the disk has been loaded, as shown in FIGS. 24 to 26 , the beam 30 is disposed at the rearmost side and the closest to the chassis main body 10 side.

That is, in this state, the slide pin 53 is located at the end of the slide cam mechanism 51 on the one end side (main slider 40 side). Therefore, the beam 30 is arranged at a position close to the rearmost side. In addition, the cam pins 35A, 35B are located at the other end side ends of the grooves of the fixed cams 34A, 34B. Therefore, the other end side (the pickup 32 side) of the beam 30 is arranged at a position closest to the base main body 10 . In addition, the lift pin 54 is located at the end of the lift cam mechanism 52 on the one end side (main slider 40 side). Therefore, one end side (spindle motor 31A side) of the beam 30 is disposed closest to the base main body 10 .

The main slider 40 moves 2 toward the disk insertion port 11 from the state shown in FIG.

And, in the state of performing the clamping operation at the first predetermined time, as shown in FIGS. The position of the base body 10 at the first Y-axis distance.

That is, in this state, the slide pin 53 moves the slide cam mechanism 51 by the first Y-axis distance, and the beam 30 moves toward the disk insertion port 11 by the first X-axis distance. Thus, the cam pins 35A, 35B move a first X-axis distance in the direction of one end of the grooves of the fixed cams 34A, 34B, and the other end of the beam 30 (on the pickup 32 side) is disposed a first distance from the base body 10. Z-axis distance position. Also, the lift pin 54 is moved by the first Y-axis distance from the one-end side (main slider 40 side) end of the lift cam mechanism 52, but since the grooves within the range of the first Y-axis distance are at the same height, One end side (spindle motor 31A side) of the beam 30 is held at a position closest to the base main body 10 .

From the state shown in FIG. 27 , the main slider 40 further moves toward the disk insertion port 11 , and the sub-slider 50 further moves toward the main slider 40 .

Moreover, in the state where the clamping operation for the second predetermined time is further performed from the state shown in FIG. 27 , as shown in FIGS. The position where the second Z-axis distance > the first Z-axis distance).

That is, in this state, the slide pin 53 moves the slide cam mechanism 51 by the second Y-axis distance, but, within this moving range, the groove of the slide cam mechanism 51 and the moving direction of the sub-slider 50 (Y-axis direction) ) are arranged in parallel, so the beam 30 does not move toward the disk insertion port 11. Therefore, the cam pins 35A, 35B do not move within the grooves of the fixed cams 34A, 34B either. In addition, the lift pin 54 moves the groove of the lift cam mechanism 52 by the second Y-axis distance, and moves the one end side of the beam 30 (spindle motor 31A side) from the base main body 10 by the second Z-axis distance.

As the main slider 40 further moves toward the disk insertion opening 11 from the state shown in FIG. 30 , the sub-slider 50 further moves toward the main slider 40 .

Furthermore, in the state where the clamping operation is performed for a third predetermined time from the state shown in FIG. 30 , as shown in FIGS. Z axis distance.

That is, in this state, the slide pin 53 moves the slide cam mechanism 51 by a third Y-axis distance, but, within the range of this movement, the groove of the slide cam mechanism 51 is not aligned with the moving direction (Y-axis direction) of the sub-slider 50. ) are arranged in parallel, so the beam 30 does not move in the direction of the disk insertion port 11. Therefore, the cam pins 35A, 35B do not move within the grooves of the fixed cams 34A, 34B either. In addition, the lift pin 54 moves the groove of the lift cam mechanism 52 by a third Y-axis distance, and moves one end side of the beam 30 (spindle motor 31A side) from the base body 10 by a third Z-axis distance (the highest lift height). In this state, clamping of the hub main body 150 to the disk is completed.

As the main slider 40 further moves toward the disk insertion opening 11 from the state shown in FIG. 33 , the sub-slider 50 further moves toward the main slider 40 .

36 to 38 , while the beam 30 moves toward the disk insertion port 11 , the other end of the beam 30 moves toward the base body 10 and is arranged at a first Z-axis distance.

That is, in this state, the slide pin 53 moves the slide cam mechanism 51 by a fourth Y-axis distance, and the beam 30 moves in the disk insertion direction by a second X-axis distance. Thus, the cam pins 35A, 35B move the second X-axis distance toward one end of the grooves of the fixed cams 34A, 34B, but the height of the other end of the beam 30 (on the pickup 32 side) does not change. Also, the lift pin 54 moves the groove of the lift cam mechanism 52 by the fourth Y-axis distance, moves one end side of the beam 30 (spindle motor 31A) toward the base body 10, and arranges it at the first Z-axis distance.

Through the above-mentioned operation, the disk is separated from the fixing pin 120 at the same time as the disk is separated from the cover body 130, and the disk enters the playback recording state.

In addition, ejection of the mounted disc is performed by driving the loading motor and moving the main slider 40 in the direction of the other end thereof, which is basically the reverse of the above-mentioned operation.

According to the present invention, the load at the time of disc insertion can be reduced, and at the same time, it is possible to adapt to fluctuations in the load and operate stably.

Industrial Utilization Possibility

The clamping device of the present invention can be used for a disk device built in a so-called notebook type personal computer in which a display unit, an input unit, and an arithmetic processing unit are integrated, or integrally provided.

Claims (19)

1. A clamping device in which a plurality of claw bodies movable in the radial direction of a hub body of a turntable are provided, and the center hole of the disk is pressed by the claw bodies to hold the disk, characterized in that, providing an elastic member for biasing the pawl main body outward relative to the hub main body, The claw main body has a claw portion that contacts the disk, and a claw-side stopper that restricts outward movement by the elastic member, The hub main body has an opening for a pawl through which the pawl can protrude outward, a hub-side stopper in contact with the pawl-side stopper, A downward guide surface is provided at a position lower than the front end portion of the claw portion, An upward receiving surface is provided on the aforementioned hub main body at a position facing the aforementioned downward guiding surface, By pressing the claw portion from above, the downward guide surface slides along the upward receiving surface, and the claw portion moves inward. 2. The clamping device according to claim 1, wherein a surface facing downward from the front end of the claw portion is used as a disk holding surface, and the downward guiding surface is provided on a side of the disk holding surface. department. 3. The clamping device according to claim 2, wherein a guide surface facing downward is provided on the claw main body at a position higher than or at the same height as the disk holding surface. 4. The clamping device according to claim 3, wherein the outer end portion of the upward guiding surface is higher than the upward guiding surface, and a part of the downward guiding surface is arranged on this portion. superior. 5. The clamping device according to claim 1, wherein at least the first inclined surface and the second inclined surface constitute the downward guide surface, and when the claw is pushed from above by the disk, When the front end of the claw is inserted into the center hole of the disk or immediately before being inserted into the center hole of the disk, the first inclined surface is used as a surface in contact with the upward receiving surface, and the claw is After the front end portion of the front end is inserted into the center hole of the disc, the second inclined surface is used as a surface in contact with the upward receiving surface, and the second inclined surface has a higher angle relative to the pressing direction than the first inclined surface. The angle is smaller. 6. The clamping device according to claim 1, wherein an inner side formed by an inclined surface gradually increasing toward the center of the hub main body is provided on the inner portion of the hub side stopper. guide surface, The inner guide surface is constituted by at least the first inclined surface and the second inclined surface, and when the claw is pushed from above by the disk, when the front end of the claw is inserted into the center hole of the disk, or when Just before being inserted into the central hole of the disk, the first inclined surface is used as a surface in contact with the claw side stopper, and after the front end of the claw is inserted into the central hole of the disk, the second inclined surface is inserted into the central hole of the disk. The inclined surface is a surface that the pawl-side stopper contacts, and the angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface. 7. The clamping device according to claim 5, wherein the first inclined surface of the downward guiding surface is formed of an arc surface, and the second inclined surface of the downward guiding surface is formed of a flat surface. noodle. 8. The clamping device according to claim 1, characterized in that, at least the first inclined surface and the second inclined surface constitute the aforementioned upward receiving surface, When the claw is pushed from above by the disk, when the front end of the claw is inserted into the center hole of the disk or immediately before being inserted into the center hole of the disk, the first inclined surface is used as the The surface which the said downward guide surface contacts is the surface which contacts the said downward guide surface after the front-end|tip part of the said claw part is inserted into the center hole part of the said disk, and the said 2nd inclined surface is made into the surface which contacts the said downward guide surface. Compared with the aforementioned first inclined surface, the angle with respect to the pressing direction is smaller. 9. The clamping device according to claim 1, wherein a surface facing downward from the front end of the claw portion is used as a disk holding surface, and the downward guiding surface is provided on a side of the disk holding surface. department, A downward-facing guide surface is provided on the claw main body at a position higher than or at the same height as the disk holding surface, and a downward-facing guide surface is provided on the hub main body at a position facing the upward-facing guide surface. the bearing surface, The opening for the claw is provided in a range from the outer periphery of the upper surface of the hub main body to the side surface, and the width of the side opening on the side is greater than the width of the upper surface opening in the outer periphery of the upper surface of the opening for the claw. More preferably, the downward facing receiving surface is arranged under the sides of the upper surface opening, and the upward facing receiving surface is arranged above the both sides of the side opening. 10. The clamping device according to claim 9, wherein each of the upward receiving surfaces provided on both sides of the side opening is connected by the hub main body, and each of the upward receiving surfaces The aforementioned disc holding surfaces are disposed therebetween. 11. The clamp device according to claim 9, wherein a coil spring is used as the elastic member, and the contact position between the pawl side stopper and the hub side stopper is set on the center line of the coil spring below. 12. The clamp device according to claim 10, wherein a contact position between the pawl-side stopper and the hub-side stopper is provided inwardly of the claw portion. 13. The clamp device according to claim 10, wherein the claw side stopper is provided on a side of the claw portion. 14. The clamping device according to claim 9, wherein, in the recording and reproducing state in which the disc is held by the claw portion, when the thickness of the disc is thin, it is different from that when the disc is thick. As a result, the claw portion moves outward, and at the same time, the position of the claw portion becomes lower. 15. The clamping device according to claim 14, wherein the upward guide surface provided on the front side of the claw main body and the hub provided at a position facing the upward guide surface The said downward receiving surface of the main body is provided with the inclination which becomes low at the front side. 16. The clamping device according to claim 9, wherein, compared with the contact portion between the lower end portion of the claw main body and the lower member in the standby state where the disk is not held by the claw portion, the clamping device is limited by The pawl-side stopper for outward movement caused by the elastic member of the pawl main body is provided on the front side, and the hub-side stopper in contact with the pawl-side stopper is set as the lower side closer to the front side. sloped surface. 17. The clamping device according to claim 14, wherein the downward guiding surface is provided at a position lower than the front end of the claw portion, and the upward receiving surface is provided at a position opposite to the downward facing surface. On the hub main body at the position where the guide surface faces, the downward guide surface is constituted by at least a first inclined surface and a second inclined surface. When the front end of the front end is inserted into the central hole of the disc or immediately before being inserted into the central hole of the disc, the first inclined surface is used as the surface in contact with the upward receiving surface, and the front end of the claw is After being inserted into the central hole of the disc, the second inclined surface is used as a surface in contact with the upward receiving surface, and the angle of the second inclined surface with respect to the pressing direction is smaller than that of the first inclined surface. , by pushing the claw portion from above, the downward guiding surface slides along the upward receiving surface, and the claw portion moves inwardly. 18. The clamp device according to claim 14, wherein a coil spring is used as the elastic member, and the contact position between the pawl side stopper and the hub side stopper is set on the center line of the coil spring At the same time, it is arranged inside the aforementioned claws. 19. A disk device, using the clamping device according to any one of claims 1 to 18, characterized in that, the casing outer package is formed by the base body and the cover body, and The disk insertion opening for directly inserting the disk is formed in the front, and the spindle motor and pickup are held by the crossbeam arranged on the base body.

Images