JPH09326148A - Disk clamp device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk clamp device capable of housing many disk and small in size. SOLUTION: When a pivot part 24 (driving member 23) is pressed into the direction of a rotation driving part 14 by a pressurizing part 10, fitting members 20, 21, 22 are pressed for expanding in the outer peripheral direction through an inclined part. Then, fitting parts on the outer peripheries of the fitting members 20, 21, 22 are fitted to the inner peripheral edge of a center hole D0 of the disk D to clamp the disk D. When the rotation driving part 14 is rotated while keeping this state, the disk D is driven for rotation in the state the pivot part 24 and pressurizing part 10 are brought in contact each other. The disk clamp device is made thinner since the clamping is completed by the slight relative movement between the rotation driving part 14 and the pressurizing part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc device such as a CD (compact disc) and a DVD (disc video disc), and more particularly to a mechanism for clamping the center hole of the disc to a rotary drive unit to be thin. Disk clamp device.

[0002]

2. Description of the Related Art FIG. 6 is a sectional view schematically showing a conventional vehicle-mounted disk device. Inside the frame body 1 shown in FIG. 6, a loading section for the magazine M and a driving section 2 are provided. The magazine M loaded in the frame 1 has a structure in which it is divided into multiple layers, and a plurality of discs D
(D1, D2, ..., Dn) can be stored. An opening M0 is provided on the left end side (the side facing the drive unit 2) of the magazine M, and the disc D can be moved between the magazine M and the drive unit 2 through the opening M0.

The drive unit 2 is provided with a drive motor 3 on the lower surface of the drive base 8, and the turntable 4 is attached to the rotary shaft 3a of the drive motor 3 protruding from the upper surface of the drive base 8.
Is pivotally supported. A clamp arm 5 rotatably supported around a fulcrum 7 is provided at the left end of the drive base 8, and a clamp member 6 is rotatably supported at the tip of the clamp arm 5.

An elevating means (not shown) is provided in the frame body 1, and the drive unit 2 is vertically moved in the Z direction in the figure. The drive unit 2 moves up and down according to the user's instruction input, and selects one disk from the plurality of disks D in the magazine M. When the drive unit 2 stops at a position for selecting one of the discs, the selected disc D in the magazine M is transferred to the drive unit 2 side by a disc ejecting unit (not shown). The center hole of the disc D transferred from the magazine M is positioned on the centering protrusion 4 a on the turntable 4. At this time, the clamp arm 5 rotates in the α direction in the figure, and the disc D is held between the turntable 4 and the clamp member 6. In this state, the drive motor 3 rotates and the disc D is rotationally driven, and the signal recorded on the disc D is read by a pickup (not shown).

[0005]

In the above structure, when the disc D is transferred onto the turntable 4 and when the disc D is returned from the turntable 4 into the magazine M, the clamp arm 5 is rotated in the β direction. It is necessary to move the clamp member 6 and lift it to the position (a) shown by the solid line.
That is, it is necessary to form a gap between the turntable 4 and the clamp member 6 for the disc D to pass through, and the thickness of the clamp member 6 and the clamp arm 5 should be formed.
On the other hand, the mechanism for supporting the clamp member 6 needs to have a predetermined thickness. Therefore, in the unclamped state in which the clamp member 6 is raised to the position (a), the height dimension indicated by H on the turntable 4 is required.

When the disc D1 stored in the uppermost stage of the magazine M is selected and sent to the drive unit 2, the drive unit is moved to a position where the upper surface of the turntable 4 is substantially aligned with the uppermost disc D1. 2 rises. Therefore, the portion of the height dimension H occupies a space above the uppermost disc D1 and the inside of the frame 1 is
In addition to the vertical movement area of the drive unit 2 in the Z direction, a height dimension including the height dimension H is required. A space Q is also required above the magazine M in the frame body 1. Therefore, the height dimension of the magazine M inserted into the frame 1 having a predetermined height is limited, and the number of disks to be stored in the magazine M is limited to a small number. Alternatively, if the number of disks in the magazine M is increased, the height dimension of the frame body 1 becomes large, and the frame body 1 as a whole becomes large.

Recently, the so-called 1DIN size or 2DI of the instrument panel in the interior of a car
It has been considered to install a magazine or a disc device capable of accommodating a plurality of discs in the N size. However, in the disc device in which the size (volume) of the frame body is limited as described above, the drive unit 2 Since the height dimension H occupies a large area in the frame, the number of disks to be stored is limited to a very small number. Further, even in a disc device in which one disc is housed in a frame of 1DIN size for reading and reproducing, if the multifunctionalization is promoted, a mechanism other than the drive unit 2 and a circuit board are provided in the frame. Etc. will be packed and stored. In this case as well, the height dimension H required for raising and lowering the clamp member 6 interferes with the mounting of other mechanisms and circuit boards.

The present invention has been made to solve the above-mentioned problems of the prior art. The mechanism for clamping a disk on a rotary drive is made thin so that the space in the frame or housing can be effectively used. It is an object of the present invention to provide a disc clamp device that is small in size and can accommodate a large number of discs in the case of a disc device in which discs or magazines are loaded.

[0009]

DISCLOSURE OF THE INVENTION According to the disk clamp device of the present invention, a plurality of fittings which can be fitted to the inner peripheral edge of the center hole of the disk by being moved in the radial direction of the disk are attached to a rotary drive section to which a rotational force is applied. A coupling member, a biasing member that biases the fitting member toward the rotation center, and a drive member that is located closer to the rotation center than the fitting members and is movable in the rotation axis direction. At least one of the coupling member and the driving member is provided with an inclined portion that is inclined with respect to the axial direction and that moves each fitting member in the fitting direction with the disc by the moving force of the driving member in the axial direction. In addition, a pressing portion that contacts the drive member and moves the drive member in the axial direction is provided.

For example, the rotary drive unit is provided so as to move in the rotation axis direction, and the pressing unit is provided on the fixed side. When the rotary drive unit moves to a predetermined position, the drive member is pressed. The drive member is axially driven by striking the portion to clamp the disc. In this case, it is preferable that a pivot portion is formed on the drive member, and the rotation drive portion is rotationally driven with the pivot portion abutting the pressing portion.

Further, the urging member is one linear or strip-shaped spring, and the spring is hooked on each fitting member,
Each fitting member is urged toward the center of rotation, and the spring is formed in a substantially triangular shape, and each side of the triangle has a hooking portion that is hooked to each fitting member. It will be provided.

The disc clamping device of the present invention is a disc device in which any one of a plurality of discs is selected and the disc is clamped by the rotary drive unit, or only one disc is inserted and the inserted disc is It can be implemented for both disc devices clamped to a rotary drive.

Two, three or four or more fitting members are provided, and each fitting member is linear in the radial direction (radial direction) with respect to the center of rotation on a table provided in the rotary drive unit, for example. It is provided so as to be movable (linearly in a direction parallel to the surface of the disc). Each fitting member is not limited to one that moves linearly, but if the fitting member has a structure that moves linearly along the surface of the disc, the moving area of the fitting member is the smallest in the plane. It can be placed within the height dimension, and the rotation drive unit can be made thin.

The fitting member is provided so as to be movable in the radial direction (radial direction of the disk) with respect to the center of rotation, and the drive member is provided at the center position of the plurality of fitting members. One or both of the fitting member and the driving member is provided with an inclined portion that is inclined with respect to the axial direction of the rotating shaft and extends in a plane or curved surface. The inclined portion may be a surface having a relatively large area, or may be a rail shape. The fitting member and the driving member are in contact with each other via the inclined portion, and in this state, the fitting members are biased toward the rotation center.

Therefore, when no external force is applied to the drive member, each fitting member moves toward the center of rotation by the biasing force, and the center hole of the disk does not have a load on the outer circumference of the fitting member. It is inserted. Next, when the driving member is moved by the pressing portion along the axial direction of the rotating shaft, each of the fitting members is linearly driven toward the outer periphery of the disc by the inclined portion, and the fitting member is moved to the center of the disc. Fitted to the inner edge of the hole, the disk is centered and clamped. In order to reliably perform this clamping, it is preferable to form an inclined portion or groove that fits on the inner peripheral edge of the center hole of the disk on the outer surface or outer peripheral surface of each fitting member. By providing the inclined portion and the groove, the disk can be stably clamped in the axial direction of the rotating shaft.

The moving direction of the driving member when the fitting member is moved in the disc clamping direction is the side on which the motor for driving the rotation driving unit is provided (or the base side which supports the rotation driving unit). The driving member may be pushed up by the pressing portion and the fitting members may be moved in the outer peripheral direction by the moving force of the driving member at this time. However, a pressing portion is provided on the side opposite to the side on which the motor or base is provided, and when the driving member is pushed toward the motor or base side by this pressing portion, each fitting member moves outward. It is preferable that the disc is moved and clamped. In this case, since it is not necessary to provide a pressing portion between the rotation driving unit and the base or the motor, the rotation driving unit can be thinned.

The pressing unit is preferably fixedly provided on the inner surface of the ceiling of the casing or the frame, and the disk drive unit (or disk drive unit) having the rotation drive unit moves toward the pressing unit. By further moving the disk drive section after the drive member hits the pressing section,
The drive member may be pushed in the axial direction, whereby each fitting member may be moved in the disc clamp direction. Further, it is preferable that the driving member is provided with a pivot portion, and the rotation driving portion is rotated in a state where the pivot portion contacts the pressing portion. With this structure, the disc can be clamped to the rotation drive unit only by providing a minimum gap that allows the disc to pass between the rotation drive unit and the pressing unit. Therefore, the height H required for the conventional disc clamp device shown in FIG. 6 is not required, and the device can be made thin. Further, in a disc device in which a plurality of discs are loaded, as shown in FIG. 1, a large number of discs can be housed within the height of the housing or the frame, and the number of discs can be increased.

The urging member for urging the fitting member toward the center of rotation may be a coil spring or a leaf spring, but a linear or strip-shaped spring is preferably used. For example, if this spring is formed in a substantially triangular shape and each side is a hook, and each hook is biased toward the center of rotation by the hook, the spring will be the front or back surface of the hook. It can be placed in a thin space such as, and the rotation drive unit can be made thin. Further, in the case of the triangular spring, the spring can be easily deformed by pressing the corner portion toward the center, and the engaging portion of the spring can be easily engaged with each fitting member.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an outline of a disk device equipped with the disk clamp device of the present invention. This disc device is a so-called disc changer,
A magazine M accommodating a plurality of disks D1, D2, D3, ... Is loaded into a frame (housing) 11, and a disk drive unit (disk drive unit) 12 selects one of the disks in the magazine M. Is driven. The disc is, for example, a CD, a DVD, a CD-ROM, or the like.

Inside the frame (housing) 11 of the disk device, a loading section for the magazine M is provided on the right side in the figure, and an elevating and moving area for the disk drive section 12 is provided on the left side. Magazine M
Is loaded from the outside of the frame 11 into the loading section. A discharge mechanism for discharging the magazine M to the outside is provided in the frame body 11. Partitions are provided in the magazine M for each layer, and a plurality of disks D are stored side by side in the height (Z-axis) direction. An opening M0 is provided at the left end of the magazine M, and the disc D is transferred between the inside of the magazine M and the disc drive unit 12 through the opening M0. The tray in which the discs are placed may protrude from the magazine M.

In the disk drive unit 12, the drive base 18
Drive motor 13 and rotary drive unit (turntable)
14 are provided. The drive motor 13 is provided in the lower part of the drive base 18, and its rotation shaft 13a projects to the upper surface side, and the rotation drive unit 14 is provided at the tip of this rotation shaft 13a.
Is pivotally supported. Further, the disc drive unit 12 is provided with a disc clamp device 19 including the rotation drive unit 14, and the center hole D0 of the disc D is held by the disc clamp device 19.

The disk drive unit 12 is moved in the Z-axis direction in the figure by the elevating means (not shown) in the frame body 11. By this ascending / descending movement, any one of the plurality of disks in the magazine M is selected. Further, in this disc apparatus, the disc D is rotated by the drive motor 13 at the position where the disc drive unit 12 is raised to the highest position (see FIG. 1), and the disc (optical head) provided on the drive base 18 causes the disc D to rotate. The recording signal of 1 is read, or the signal is written to the disc.

FIG. 2 is a vertical cross-sectional view of the disc clamp device 19 according to the present invention. FIG.
(B) shows a clamped state. FIG. 3 is a plan view of the disc clamp device shown in FIG. 2, where (A) shows a non-clamped state and (B) shows a clamped state. The disc clamp device 19 includes a rotary drive unit (turntable) 1
Three substantially fan-shaped fitting members 20, 2 provided on
1 and 22, one driving member 23 provided on the center side of each fitting member, a linear spring 25 as a biasing member that biases each fitting member, and a driving member 23 that are integrally formed. The pivot part 24 and the frame 11 as shown in FIG.
And a pressing portion 10 fixed to the inner surface of the ceiling.

As shown in FIGS. 2 (A) and 2 (B), the leg portions 20b and 20b are provided on the lower surfaces of the fitting members 20, 21 and 22, respectively.
21b (not shown) and 22b are integrally formed to project. In addition, the inner peripheral surfaces of the fitting members 20, 21, 22 are tapered surfaces 20a, 21a, 22a as inclined portions that incline so as to spread upward from the surface of the rotation drive portion 14.
Are respectively formed. Each fitting member 20, 21, 22
Are arranged such that the three tapered surfaces 20a, 21a, 22a face the central axis O-O of the rotation shaft of the drive motor 13, respectively.

A driving member 23 is provided in a region where the tapered surfaces 20a, 21a, 22a in the central portions of the fitting members 20, 21, 22 face each other. The drive member 23 is formed with three inclined surfaces 23a, 23a, 23a that are capable of abutting and facing the respective tapered surfaces, and the drive member 23 has a substantially triangular trapezoidal shape. There is.
The drive member 23 is movable in the axial direction of the rotary shaft (the central axis OO direction) by sliding between the tapered surface and the inclined surface. The drive member 23 is urged upward in the drawing away from the drive motor 13 by an elastic member 27 such as a coil spring provided between the drive member 23 and the rotary drive unit 14.

The rotary drive unit (turntable) 14
In addition, a sliding shaft extending from the center of the upper surface in the direction of the central axis OO may be integrally provided, and the drive member 23 may be slidably supported with respect to the sliding shaft. The elastic member 2
7 makes it easier for the drive member 23 to move to the non-clamping position shown in FIG.
The elastic member 27 may be omitted when a linear spring 25, which will be described later, that biases 0, 21, 23 toward the center is strong.

The rotary drive unit (turntable) 14 includes:
Long holes 14a, 14a, 14a linearly extending in the radial direction (radial direction) about the central axis O-O are formed, and the leg portions 20b, 2 are provided in the long holes 14a.
1b and 22b are inserted. By sliding the leg portions 20b, 21b, 22b in the elongated holes 14a, the fitting members 20, 21, 22 can slide in the radial direction with respect to the central axis OO direction. The sliding operation is a linear movement in the radial direction parallel to the upper surface (the surface of the disk) of the rotary drive unit 14.

The outer peripheral surfaces of the respective fitting members 20, 21, 22 are fitting portions 20c, 21c, 22c which fit into the inner peripheral edge of the center hole D0 of the disc D. FIG.
As shown in (A) and (B), the fitting portions 20c and 21
Reference characters c (not shown) and 22c each have an inclined shape whose diameter decreases in the direction of the rotation drive unit (turntable) 14. Alternatively, the fitting portions 20c, 21c, 22c may be V-shaped grooves.

Protrusions 26b, 26b, 26b are integrally formed on the upper surfaces of the fitting members 20, 21, 22 so as to integrally project. As shown in FIGS.
A substantially triangular linear spring 25 is hung as an urging member on the outer periphery of 6b, 26b, 26b. FIG.
As shown in (A) and (B), a triangular linear spring 25 is also provided on the lower surface of the rotary drive unit 14 on the projections 26a, 26a, 26a at the tips of the leg portions 20b, 21b, 22b. It is hung. Alternatively, the spring 25 may be provided only on one of the lower protrusion 26a and the upper protrusion 26b of the fitting member.

With the above-mentioned triangular linear spring 25,
Each fitting member 20, 21, 22 is in the center direction (center axis OO
Direction). The linear spring 25 is a hooking portion that is hooked on the fitting members 20, 21, 22 near the center of each side of the triangle, and the hooking portion of each side is the protrusion 26a.
And 26b. In addition, the linear spring 2
5 is provided with a deformed portion obtained by bending a spring wire into a concave shape or a V shape at the center of each side, and the deformed portion is provided with the protrusions 26a and 26a.
It may be a hooking portion for b.

Each protrusion 2 of this triangular linear spring 25
As shown in FIG. 4, the triangular wire-shaped apex of the initial wire spring 25a in the dotted line state is mounted on the 6a or 26b by f3.
Pressed toward the center by the external force indicated by f3 and f3, swelling each side of the triangle in the outer peripheral direction as indicated by the solid line, reference numeral 25
It is transformed into a substantially circular shape shown by b. In this state, the fitting member is hung on the outside between the protrusions 26a or 26b. When the external force f3 is released, the linear spring 25 tries to restore the triangle, and the protrusions 26a and 26b are formed by the respective sides of the triangle.
On the other hand, a biasing force f1 toward the center shown in FIG. The linear spring 25 can be easily attached to the protrusion 26a or 26b by applying external force f3 from three directions as shown in FIG. Further, since the external force f3 is in the horizontal direction, the work of applying the external force f3 is also easy. Further, since the linear spring 25 has a planar triangular shape, the linear spring 25 is thin, and the overlapping dimension of the rotary drive unit 14 at the top and the bottom is small, which is suitable for thinning. In addition,
The triangular spring may be formed by a strip spring. Further, the linear spring 25 is not necessarily limited to the triangular shape, and a ring-shaped spring made of rubber or resin is used.
The diameter of this ring-shaped spring may be expanded so that it can be hung on the outside of each of the protrusions 26a and 26b.

Next, the operation of the disk device shown in FIG. 1 will be described. In this disc device, when the disc in the magazine M is selected, the disc drive unit 12 drives the frame 1
Move up and down in 1 in the Z direction. At the time of this up-and-down movement, since the pivot part 24 provided on the drive member 23 is separated from the pressing part 10, the drive member 23 is elastic.
Is moved in the Z (+) direction (the direction away from the rotation drive unit 14) by the elastic force of the fitting members 20, 21,
22 is also moved toward the center by a spring 25.
Therefore, the outer peripheral portion of each fitting member 20, 21, 22 has the minimum diameter W0, and the center hole D0 of the disk D can pass through the outer circumference of the fitting member 20, 21, 22.

When the disk drive section 12 moves up and down in the Z direction and stops at a position for selecting one of the disks in the magazine M, a disk transfer means (not shown) causes
The selected disc D is pulled out from the magazine M,
The center hole D0 is inserted through the outer peripheral portions of the fitting members 20, 21, 22 to obtain the state shown in FIG. 2 (A).

When the disk D is installed, the disk drive unit 12 and the rotation drive unit 14 mounted on the disk drive unit 12 move upward together (moves in the axial direction of the rotating shaft), and as shown in FIG. The tip of the pivot part 24 is abutted against the lower end surface 10 a of the pressing part 10. Further, the disk drive unit 12
2 rises, as shown in FIG. 2B, the drive member 23
Is relatively pressed downward in the drawing by the pressing portion 10. As a result, each inclined surface 23a formed on the drive unit 23
Contact the tapered surfaces 20a, 21a, 22a and slide, and the angle of inclination causes the fitting members 20, 21, 22 to spread outwardly by force f2 as shown in FIG. 3 (B). . At this time, the fitting portions 20c, 21c, 22c on the outer peripheral surfaces of the fitting members 20, 21, 22 are fitted to the inner peripheral edge of the center hole D0 of the disk D, and the disk D is clamped. As shown in FIG. 2B, the fitting portion 20c,
Since the reference numerals 21c and 22c are inclined surfaces directed in the direction of the axis OO toward the lower end in the figure, the disk D is rotated by the rotary drive unit 14.
It is securely held so as not to separate from the top surface of the table.

With the tip of the pivot portion 24 still in contact with the lower end surface 10a of the pressing portion 10, the drive motor 13 rotationally drives the rotational drive portion 14 to rotationally drive the clamped disc D. Then, a pickup (optical head) (not shown) provided on the drive base 18 reads or writes a signal from the disk D. Although not particularly shown, the lower end surface 10 of the pressing portion 10
By providing a substantially spherical concave portion for receiving the tip of the pivot portion 24 in a, it is possible to suppress center runout during rotation of the rotation drive portion 14. When the reading or writing is completed, the disk drive unit 12 descends. By this descending operation, the elastic member 27 and the linear spring 25 exert elastic force immediately after the pivot unit 24 separates from the pressing unit 10. As shown in FIG. 2 (A), the fitting members 20, 21, 22 move toward the center, and the clamp on the disc D is immediately released.

In the disc clamp device 19, the outer diameter of the fitting members 20, 21, 22 expands outward from the minimum diameter W0, and the drive member 2 is clamped while the disc is clamped.
Since 3 moves downward in the drawing, the height dimension above the rotary drive unit 14 is reduced from h0 to h1. Therefore, in the disk drive state shown in FIG. 1, the disk drive unit 1
2 can be brought very close to the ceiling plate in the frame 11. Further, in the state of FIG. 2B, the dimension h1 may be set so that the pivot portion 24 slightly projects from the upper surfaces of the fitting members 20, 21, 22 and the movement amount of the driving member 23 is small. Since it is good, the dimension h in the unclamped state
0 can be set small. Therefore, the elevating region of the disk drive unit 12 in the frame body 11 can be expanded. Correspondingly, even if the height dimension of the magazine M is large, the uppermost disc D1 can be surely drawn onto the rotation drive unit 14. Therefore, the number of disks D that can be stored in the frame 11 can be increased. Further, as shown in FIG. 6, since it is not necessary to provide a region of height H above the disk drive portion, the frame body 11 can be made thin when a predetermined number of disks are stored.

5A and 5B are conceptual sectional views showing a disc device having another structure using the disc clamp device of the present invention. FIG. 5A shows a state where the disc is clamped, and FIG. 5B shows a state where the disc is clamped. Show. In this disc device, a round bar-shaped pressing portion 31 is provided below the ceiling portion of the frame body 30.
The pressing portion 31 is slidable in the vertical direction in the figure by being guided by a guide shaft (not shown) or the like. A compression coil spring 32 is provided between the pressing portion 31 and the ceiling portion of the frame body 30. A plurality of discs indicated by blanks are accommodated in the frame body 30, and the pressing portion 31 is located so as to penetrate the center hole D0 of each disc D.

Further, the disk drive unit 35 is the moving base 3
6 has a movable base 36, and
It is possible to reciprocate between a position distant from the outer periphery of the disk and a position corresponding to the center hole D0 of the disk D as shown in FIGS. A disc clamp device 19 having the same structure as that shown in FIGS. 2A and 2B is provided on the moving base 36. The disc clamp device 19 includes fitting members 20, 21, 22 and a driving member 23 provided on a rotary drive unit 14 driven by a motor 37 provided on a lower surface of a moving base 36.

When the lowermost disc D is clamped, all the discs from are raised in the frame 30 and the moving base 36 is moved in the direction orthogonal to the plane of the drawing to be removed from the outer periphery of the disc D. It is moved from the standby position to a position facing the pressing portion 31. In this state,
The disk D is moved down and installed on the rotation drive unit 14.
When the moving base 36 is raised as it is, as shown in FIG. 5 (A), the pivot portion 24 contacts the lower surface of the pressing portion 31, the driving member 23 is pushed downward, and the fitting members 20, 2
1, 22 move in the expanding direction, the center hole D0 of the disk D is clamped by the fitting members 20, 21, 22 and the disk is rotationally driven at that position. Similarly, the pickup (optical head) also moves in the direction orthogonal to the paper surface,
Then, the signal recorded on the disk is read or written.

Next, when the disk D is clamped, the clamp is released in the state of FIG. 5 (A), and the moving base 36 is moved to a position where it is removed from the outer periphery of the disk D. Then, the disk descends, and the moving base 36 intervenes between the disk and the disk. Then, when the moving base 36 rises, the pivot portion 24 moves the pressing portion 3
Upon hitting 1, the disk D is clamped and driven as shown in FIG. 5 (B). In this example, since the disc that has not been reproduced is accommodated on the outer periphery of the pressing portion 31, the region for accommodating the disc can be expanded to the upper region within the frame body 30, and the space within the frame body 30 can be effectively used. it can.

When the moving base 36 is raised while the pivot portion 24 is in contact with the pressing portion 31, the compression coil spring 32 contracts and the pressing portion 31 rises.
Since the disc clamp and the drive can be performed at the raised position, the position of the disc drive unit 35 at the time of driving can be arbitrarily set according to the selection of the disc. Further, the disc clamp device of the present invention can be implemented in the disc drive portion of a disc device into which only one disc is inserted. Also in this case, since the space above the rotation drive unit may be the minimum, the device can be made thin and the space in the housing can be effectively used.

[0042]

According to the present invention described in detail above, since the space area for clamping the disk can be minimized in the frame (housing), the space in the frame can be effectively used and the device can be made thin. Can be converted. Further, in the case of a disc device that accommodates a large number of discs, the number of discs that can be accommodated can be increased.

Further, by urging each fitting member by a linear or strip-shaped spring, the device can be made thin and the assembling work becomes easy.

[Brief description of drawings]

FIG. 1 is a cross-sectional view schematically showing a disc device equipped with a disc clamp device according to the present invention

FIG. 2 is a vertical cross-sectional view of a disc clamp device according to the present invention, where (A) shows a non-clamped state and (B) shows a clamped state.

3 is a plan view of the disc clamp device of FIG.
(A) shows an unclamped state, (B) shows a clamped state,

FIG. 4 is a plan view showing a method of mounting a linear spring,

5A and 5B show a disc device having another structure using the disc clamp device of the present invention, where FIG. 5A is a conceptual sectional view showing a reproducing state of the disc, and FIG. 5B is a conceptual sectional view showing a reproducing state of the disc.

FIG. 6 is a sectional view schematically showing a conventional vehicle-mounted disc device,

[Explanation of symbols]

 10 pressing part 11 frame body 12 disk drive part 13 drive motor 14 rotation drive part 14a long hole 20,21,22 fitting member 20a, 21a, 22a taper surface 20b, 21b, 22b leg part 20c, 21c, 22c fitting part 23 Drive Member 23a Sloping Surface 24 Pivot Part 25 Linear Springs 26a, 26b Protrusion D Disk D0 Center Hole M Magazine M0 Opening

Claims (5)

[Claims] 1. A plurality of fitting members capable of being fitted in an inner peripheral edge of a center hole of a disk by being moved in a radial direction of the disk by a rotary drive unit to which a rotational force is applied, and the fitting members being arranged in a rotation center direction. An urging member for urging to and a drive member that is located closer to the center of rotation than each fitting member and is movable in the rotation axis direction are provided, and at least one of the fitting member and the driving member is An inclined portion that is inclined with respect to the axial direction and that moves each fitting member in the fitting direction with the disk by the moving force of the driving member in the axial direction is formed, and the driving member is abutted against the driving member. A disc clamp device comprising a pressing portion that moves in the axial direction. 2. The rotary drive unit is provided so as to move in the rotation axis direction, and the pressing unit is provided on the fixed side. When the rotary drive unit moves to a predetermined position, the drive member hits the pressing unit. The disc clamping device according to claim 1, wherein the drive member is axially driven to clamp the disc. 3. The disc clamp device according to claim 1, wherein the drive member is provided with a pivot portion, and the rotary drive portion is rotationally driven with the pivot portion abutting against the pressing portion. 4. The urging member is a single linear or strip-shaped spring, and the spring is hooked on each fitting member so that each fitting member is urged toward the center of rotation. The disc clamp device according to any one of 1 to 3. 5. The spring is formed in a substantially triangular shape,
The disc clamp device according to claim 4, wherein a latching portion that is latched by each fitting member is provided on each side of the triangle.