JP2010067328A - Clamping structure for disk drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit operation failure of a clamping structure of a disk drive. <P>SOLUTION: The disk drive 1 includes a clamping lever 11 for pressing a disk D to a turntable 5, a cam arm 12 for holding the clamping lever 11 when the clamping lever 11 turns upward, a slider 13 for switching whether to hold the clamping lever 11 by the cam arm 12, and a hinge 4 of a chassis 2 for rotatably supporting so that a downward biasing force by a clamping lever lowering spring 15 will not act on the slider 13 through the cam arm 12. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a clamp structure for a disk device.

  As a structure for holding a reading medium (hereinafter simply referred to as a disk) such as a compact disk, a DVD, or a Blu-ray disk inserted in the disk device, a clamp structure is known in which the disk is pressed against and held by a turntable of the disk device. (For example, Patent Document 1).

FIG. 3 shows a perspective view of a clamp structure 100 of a conventional disk device.
The disc device clamp structure 100 includes a clamp lever 111. The clamp lever 111 is pivoted in the vertical direction at the tip thereof above a turntable (not shown). The clamp lever 111 is pulled downward by a spring 112, and is provided so as to rotate downward about a rotation shaft 111a. In the clamp lever 111, a locking portion 111b provided integrally with the clamp lever 111 is locked to the upper side of the slider 113, and the rotation angle thereof is maintained.

The slider 113 is a plate-like member that operates along the direction in which the disc is inserted into the disc device. The slider 113 has a guide groove 124 that holds the sliding portion pin 102 inside thereof. The sliding portion pin 102 is a pin provided integrally with the chassis of the disk device, and guides the operating direction of the slider 113 in cooperation with the guide groove 124. When the slider 113 is in operation, the inner wall of the guide groove 124 and the sliding portion pin 102 slide.
The lower surface of the slider 113 is supported by the support member 103. When the slider 113 is in operation, the slider 113 and the support member 103 slide.

  The slider 113 has a clamp lever guide 120 on its upper side. The clamp lever guide part 120 has an inclined part 121. The clamp lever guide portion 120 has upper side portions 122 and 123 having different vertical heights with the inclined portion 121 interposed therebetween. In the following description and FIGS. 3, 4 </ b> A, and 4 </ b> B, the upper side portion provided with a high height in the vertical direction across the inclined portion 121 is the upper side portion 122, and the upper side portion provided lower is the upper side portion. 123.

FIG. 4 shows the mechanism of the rotation operation of the clamp lever 111. 4A shows when the clamp lever 111 is raised, and FIG. 4B shows when the clamp lever 111 is lowered.
The clamp lever 111 is rotated by the operation of the slider 113. Specifically, as shown in FIG. 4A, when the locking portion 111b is locked to the upper side portion 122, the clamp lever is raised, and as shown in FIG. When the locking portion 111b is locked, the clamp lever is lowered. That is, when the slider 113 is operated, the clamping portion 111b of the clamp lever 111 moves up and down along the inclined portion 121 so that the clamp lever 111 rotates.

Switching between holding and non-holding of the disk by the disk clamp structure 100 corresponds to raising and lowering of the clamp lever 111. Specifically, when the clamp lever 111 is raised, the disc is not held because it is not pressed against the turntable 102, and when the clamp lever 111 is lowered, the disc is pushed against the turntable 102 and held. The
JP 07-161109 A

  However, the clamp mechanism 100 of the conventional disk device may cause a malfunction in the disk holding or releasing operation. That is, a downward biasing force by the spring 112 is applied to the slider 113 via the locking portion 111b of the clamp lever 111, whereby the locking portion 111b and the clamp lever guide portion 120, the lower surface of the slider 113, the support member, and the guide This is because a strong friction is generated on each sliding surface such as between the groove 124 and the sliding portion pin 102 to inhibit the operation of the slider 113 and hinder the rotating operation of the clamp lever 111.

  An object of the present invention is to suppress malfunction of a clamp structure of a disk device.

  According to the first aspect of the present invention, a clamp portion that biases and holds the disc toward the reading device side of the disc device, and holds the position of the clamp portion at least when the clamp portion is not biased to the disc. A holding portion that performs switching between the holding portion and whether or not the clamp portion is held by the holding portion, and a support portion that supports the holding portion so that the urging force of the clamp portion does not act on the operating portion via the holding portion. And a disc device clamping structure.

  According to a second aspect of the present invention, in the disc device clamp structure according to the first aspect, the holding portion includes a rotating member rotatably supported by a chassis of the disk device.

  According to a third aspect of the present invention, in the clamp structure for a disk device according to the second aspect, the operating portion engages with the rotating member and operates to change the rotation angle of the rotating member. It has the member.

  According to a fourth aspect of the present invention, in the clamp structure for a disk device according to the third aspect, the guide member is connected to the rotating member via a wall surface provided perpendicular to the operating direction of the guide member. It is characterized by engaging.

  According to a fifth aspect of the present invention, in the clamp structure for a disk device according to the fourth aspect, the guide member includes a groove along the operating direction of the guide member and a groove along a direction orthogonal to the operating direction. The rotating member is engaged through a continuous L-shaped groove.

  According to the present invention, it is possible to suppress malfunction of the clamp structure of the disk device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a configuration of a clamp structure 10 of a disk device according to an embodiment of the present invention.
The disc device clamp structure 10 includes a clamp lever 11, a cam arm 12, and a slider 13.

The clamp lever 11 is supported by a pivot shaft 3 provided on the chassis 2 so as to be pivotable up and down.
The clamp lever 11 has a clamper 14 at its tip. The clamp lever 11 urges the disc D to be pressed against the turntable 5 (see FIG. 2) of the disc reading device via the clamper 14 when lowered to hold the disc. The rotation angle of the clamp lever 11 shown in FIG.

  The cam arm 12 is rotatably supported by the hinge portion 4 of the chassis 2 by a rotation support shaft 12e. In the cam arm 12, the first support surface 12 a and the second support surface 12 d are in contact with the lower surface portion of the clamp lever 11. The cam arm 12 holds the rotation angle of the clamp lever 11 by supporting the clamp lever 11 from below.

The slider 13 is a plate-like member provided so as to be operable in the disk insertion / ejection direction in the disk device, and the presence or absence of the clamp lever 11 held by the cam arm 12 is switched by the operation. The operation of the slider 13 is performed by a driving unit such as a motor (not shown). The operation direction of the slider 13 is guided by a guide portion (not shown) provided in the chassis 2 or the like. That is, the slider 13 slides with the guide part.
The slider 13 has a cam groove 21 inside thereof. The cam groove 21 is an L-shaped groove that connects the groove surface along the disk surface of the slider 13 and the disk insertion / ejection direction and the groove surface along the disk surface of the slider 13 and the vertical direction. The cam groove 21 has a cam arm pin 12b inside thereof.

  The cam arm pin 12b is a protrusion that is formed integrally with the rotating arm 12c of the cam arm 12 and is provided so as to protrude from the rotating arm 12c. Hereinafter, the maintenance of the rotation angle of the clamp lever 11 and the cam arm 12 will be described.

  The clamp lever 11 is pulled downward by a clamp lever lowering spring 15 interposed between the clamp lever 11 and the chassis 2. Accordingly, the cam arm 12 receives a downward pressing force by the clamp lever lowering spring 15 via the support surface 12a and the clamp lever 11, but the first support surface 12a is lowered from the position of the rotation support shaft 12e. Since the force by the spring 15 does not cause the cam arm 12 itself to generate turning force, the cam arm 12 is maintained at a rotation angle at which the cam arm pin 12 b does not contact the upper and lower inner edge portions 22, 23 of the cam groove 21.

Next, a mechanism for lowering the clamp lever 11 will be described.
FIG. 2 shows a clamp structure 10 of the disk device when the clamp lever 11 is lowered.
When the slider 13 is operated and the cam arm pin 12b comes into contact with the side wall 24, the cam arm pin 12b is guided in the operation direction of the slider 13 (the left direction in FIGS. 1 and 2) as the slider 13 is operated. When the cam arm pin 12b is guided, the cam arm 12 rotates about the rotation support shaft 12e, and the contact between the lower surface of the clamp lever 11 and the support surface 12a is eliminated. At this time, the clamp lever 11 is rotated downward by the tensile force of the clamp lever lowering spring 15. That is, when the cam arm 12 is in contact with the lower surface of the clamp lever 11 via the support surface 12a, the cam arm 12 supports the clamp lever 11 in the raised position, and the contact between the lower surface of the clamp lever 11 and the support surface 12a is eliminated. In this case, the clamp lever 11 is provided to be lowered.

  The side wall 24 is provided perpendicular to the operating direction of the slider 13. When the side wall 24 pushes the cam arm pin 12b with the operation of the slider 13, the cam arm pin 12b moves in the operation direction of the slider 13, and the cam arm 12 rotates in the right direction in FIGS. Thereby, contact | abutting with the clamp lever 11 and the 1st support surface 12a is eliminated, and the clamp lever 11 falls. The clamp lever 11 contacts the second support surface 12d during lowering.

  As the clamp lever 11 is lowered, the clamper 14 presses and holds the disk D against the turntable 5 as shown in FIG. At this time, a certain clearance is maintained between the clamp lever 11 and the second support surface 12d.

  When the clamp lever 11 is raised after the clamp lever 11 is lowered, the slider 13 operates in a direction opposite to that when the clamp lever 11 is lowered. At this time, the side wall 25 of the cam groove 21 pushes the cam arm pin 12b to rotate the cam arm 12 upward, and guides it to the rotation angle of the clamp lever 11 and the cam arm 12 shown in FIG. The side wall 25 is located opposite to the side wall 24 and is provided perpendicular to the operation direction of the slider 13. Therefore, when the side wall 25 pushes the cam arm pin 12b with the operation of the slider 13, the cam arm pin 12b moves in the operation direction of the slider 13.

  1 and 2 and the above description describe only the clamp structure 10 of the disk device, the clamp structure 10 of the disk device may be interlocked with other parts of the disk device. For example, like the slider 113 shown in FIG. 3, a groove 32 for changing the position of the disk transport roller 31 may be provided in the slider 13. In this case, by the operation of the slider 13, the rotation operation of the clamp lever 11 and the position changing operation of the disk transport roller 13 can be performed simultaneously.

  According to the above-described embodiment, the downward biasing force due to the tension force of the clamp lever lowering spring 15 is supported by the hinge portion 4 of the chassis 2 and thus does not act on the slider 13. Therefore, since the slider 13 can operate satisfactorily, the clamp structure 10 of the disk device can perform the rotation operation of the clamp lever 11 through the rotation operation of the cam arm 12. That is, it is possible to effectively suppress the malfunction of the disk holding or releasing operation, which is a problem of the clamp structure of the conventional disk device.

Further, whether or not the rotation angle is maintained when the clamp lever 11 is raised can be switched by changing the rotation angle of the cam arm 12. That is, the clamp lever 11 can be raised and lowered by a simple mechanical operation, and the clamp structure of the disk device can be simplified.
In addition, since the cam arm 12 is rotatably supported by the chassis 2 of the disk device, the support force due to the strength of the chassis 2 can be used in maintaining the rotation angle of the clamp lever 11. Support can be stabilized.

  Further, when the locking portion 17 is provided, the rotation angle of the cam arm 12 is maintained by the locking portion 17, so that the maintenance of the rotation angle when the clamp lever 11 is raised is more stable.

  Further, the cam arm 12 is engaged with the cam groove 21 of the slider 13 via the cam arm pin 12 b and is rotated by the operation of the slider 13. Therefore, another operating part of the disk device, for example, a driving part for changing the position of the disk conveying roller 31 shown in FIG. 3 and a driving part for rotating the clamp lever 11 can be provided integrally. Therefore, it is possible to obtain excellent effects such as cost reduction due to the reduction in the number of parts and compactness of the disk device.

Furthermore, since the side wall 24 provided perpendicular to the operation direction of the slider 13 pushes the cam arm pin 12b to rotate the cam arm 12, the stress of the cam arm pin 12b acts in the direction opposite to the operation direction of the slider 13. That is, the stress vector of the cam arm pin 12b does not occur in the vertical direction, and the slider 13 does not receive the force of the vertical vector. Therefore, there is no problem that the slider 13 and the guide portion cause strong friction by the urging of the slider 13 in the vertical direction and the operation of the slider 13 is hindered. That is, since the slider 13 can be operated more favorably, the rotation operation of the clamp lever 11 can be performed better.
In addition, since the side wall 25 provided perpendicular to the operation direction of the slider 13 pushes the cam arm pin 12b to rotate the cam arm 12, the stress of the cam arm pin 12b acts in the direction opposite to the operation direction of the slider 13. Accordingly, as described above, the slider 13 can be operated more favorably, so that the rotation operation of the clamp lever 11 can be performed better.

  Further, the slider 13 has an L-shaped cam groove 21, and the cam arm 12 is rotated by pushing the cam arm pin 12 b through the side wall 24 and the side wall 25 of the groove provided in the vertical direction, that is, perpendicular to the operation direction of the cam arm 12. Let Therefore, the stress vector of the cam arm pin 12b is not generated in the vertical direction during both the raising operation and the lowering operation of the clamp lever 11, and the slider 13 is not subjected to the force of the vertical vector, so that the slider 13 can be operated better. Therefore, the rotation operation of the clamp lever 11 can be performed better.

  The embodiment of the present invention should be considered that the embodiment disclosed this time is illustrative and not restrictive in all respects. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  For example, the cam groove 21 is not limited to the L-shape, and the cam arm pin 12b may be guided by inclination to change the vertical position of the cam arm pin 12b.

It is a block diagram of the clamp structure of the disc apparatus by embodiment of this invention. It is a figure which shows the clamp structure of the disc apparatus in case the clamp lever is falling. It is a perspective view which shows the clamp structure of the conventional disc apparatus. It is a figure which shows the mechanism of the rotation operation | movement of the conventional clamp lever. FIG. 4A shows the time when the clamp lever is raised, and FIG. 4B shows the time when the clamp lever is lowered.

Explanation of symbols

11 Clamp lever 12 Cam arm 13 Slider 14 Clamper 15 Clamp lever lowering spring 17 Locking portion 21 Cam groove

Claims (5)

A clamp unit that biases and holds the disc toward the reader side of the disc device;
A holding part for holding the position of the clamp part when at least the urging of the clamp part against the disk is not performed;
An operation part for switching presence or absence of holding of the clamp part by the holding part;
A support part for supporting the holding part so that the urging force of the clamp part does not act on the operating part via the holding part;
A clamp structure for a disk device, comprising:   The disk device clamp structure according to claim 1, wherein the holding portion includes a rotating member rotatably supported by a chassis of the disk device.   3. The disc drive clamp structure according to claim 2, wherein the operating portion includes a guide member that engages with the rotating member and operates to change a rotating angle of the rotating member.   4. The disc drive clamping structure according to claim 3, wherein the guide member is engaged with the rotating member via a wall surface portion provided perpendicular to the operation direction of the guide member.   The guide member is engaged with the rotating member via an L-shaped groove in which a groove along the operation direction of the guide member and a groove along a direction orthogonal to the operation direction are continuous. The clamp structure of the disk device according to claim 4.

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