JP2000187918A - Disk device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk device having a tray, capable of loading either of a first cartridge having a recessed part formed in a part of its side face and a second cartridge having a recessed part in a side face position different from that for the recessed part of the first cartridge, and preventing the falling- off of the first or second cartridge even during vertical use. SOLUTION: A tray 4 is provided with a first projected part 11 engaged with the recessed part 152 of a first cartridge 150, and a second projected part 12d held in the tray 4 via an elastic member, displaced at least in a direction vertical to the side face of the first cartridge 150, and engaged with the recessed part 252 of a second cartridge 250 when the second cartridge 250 is loaded. Thus, the falling-off of each of the first and second cartridges 150 and 250 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device for a high-density recording medium such as an optical disk.
In particular, the present invention relates to a disk device that performs loading using a tray on which a cartridge loaded with a disk is placed.

[0002]

2. Description of the Related Art One of the most common loading methods for a disk is a tray method in which a disk is placed on a flat tray and transferred. The features of this method include the simplicity of the device configuration and the good operability when the disk device is installed horizontally, and the tray method has been improved to load a bare disk and an optical disk loaded in a cartridge. Conventionally, there has been disclosed a configuration for preventing a disk or cartridge from falling off even when the tray is in a vertical position.

[0003] As such a tray-type disk device, one described in Japanese Patent Application Laid-Open No. 9-91821 is known. Such a conventional cartridge and disk device will be described with reference to FIGS.

FIGS. 11A to 11C are views showing the structure of a PD (phase change optical disk) cartridge which is a cartridge mounted on a conventional disk device. In FIG. 11, reference numeral 250 denotes a PD cartridge,
Recordable / reproducible disk 2 of almost the same shape as a 2 cm diameter CD
51 is built-in. Reference numeral 253 denotes a pair of alignment holes provided at an interval of a distance Ap for positioning by engaging with a positioning pin (not shown) provided on the disk device. The distance between the reference line connecting the pair of alignment holes 253 and the center of the disk is Bp. In the PD cartridge 250, a pair of recesses 252 are provided on the side surface at a distance of Cp from the alignment hole 253 in order to prevent the PD cartridge 250 from dropping from the tray during vertical use.
p and depth Ep. The corner formed by the side surface having the concave portion 252 is chamfered with a radius Fp. Reference numeral 254 denotes a notch, and the alignment hole 25
A pair is disposed at a distance of 3 to Dp, and is mainly used for auto loading.

FIG. 12 shows the structure of a conventional disk drive on which the above-described PD cartridge 250 is mounted. 12A and 12B, reference numeral 203 denotes a tray, which is a cartridge mounting surface 205 on which the PD cartridge 250 is mounted and a bare disk mounting surface 2 on which a bare disk is mounted.
06. The bare disk mounting surface 206 is provided at a position lower than the cartridge mounting surface 205, and has a step for supporting the outer shape of the naked disk. Reference numeral 204 denotes a housing of the disk device, which internally includes a turntable for mounting a bare disk or a built-in disk of a cartridge held on the tray 203 and a pickup for performing recording or reproduction. Reference numeral 207 denotes a pair of bare disk holding members, which are attached to the tray 203 so as to be rotatable about a rotation fulcrum 207b. A leaf spring 210 is fixed to the back surface of the bare disk holding member 207, and the tip 210 a of the leaf spring 210 urges a part 203 a of the tray so that the bare disk holding member 207 protrudes from the cartridge mounting surface 205. I have. At this time, a projection 207a provided at the tip of the bare disk holding member 207 supports the outer peripheral edge of the bare disk in a freely detachable manner, and prevents the bare disk from falling off even when the disk device is in the vertical posture. Reference numeral 208 denotes a disk holding claw, which is attached to the cartridge urging member 211. Tray 2 for bare disks when using the disk device vertically
When the user mounts the disk on the tray 203, the user can make one of the pair of naked disk holding members 207, which is positioned vertically downward, and the disk holding claw 208 protrude as shown in the drawing to prevent the naked disk from dropping from the tray 203. It can be prevented. The cartridge urging member 211 is the tray 2
03 is slidably supported in the direction A in the figure, and is urged by a pair of compression coil springs 212. Reference numeral 209 denotes a cartridge stopper preventing protrusion provided on the tray 203, which is fixed integrally with the tray 203.

FIGS. 13A and 13B show a state where the PD cartridge 250 described with reference to FIG. 11 is mounted on the disk device configured as described above. PD cartridge 25
0 is mounted on the cartridge mounting surface 205 and is roughly positioned and held while being pressed against the inner wall 203b of the tray by the cartridge urging member 211. At this time, the bare disk holding member 207 does not protrude from the cartridge mounting surface 205 and does not hinder the mounting of the cartridge 250. Further, the cartridge drop prevention protrusion 209 is engaged with the recess 252 of the cartridge to prevent the cartridge 250 from dropping when the disk device is used vertically.

[0007]

However, in the above-mentioned disk drive, it is possible to position a single cartridge and to prevent it from falling off when used vertically, but to maintain compatibility with different types of cartridges having different shapes. ,
It has been difficult to achieve both the positioning of each cartridge and the prevention of falling off during vertical use. Hereinafter, this problem will be described.

In recent years, CDs have been used as read-only disks.
DVD-VIDEOs (hereinafter simply referred to as DVDs) and DVD-ROMs having larger recording capacities have been standardized and commercialized. The DVD and DVD-R
Since the OM has substantially the same shape as a CD, a DVD or DVD-ROM can be handled on the same tray as the above-mentioned disk device.

On the other hand, in addition to the above-mentioned PD disk, a DVD-RAM disk having a larger recording capacity than the PD disk has been standardized as a rewritable optical disk. The DVD-RAM disk itself has substantially the same shape as a disk with a built-in CD and PD cartridge. The DVD-RAM disk is a phase-change type rewritable optical disk like the PD cartridge 250, and there are many elements that can be technically shared for recording and reproduction. However, PD cartridge 250 and DVD-RA
The position of the concave portion of the cartridge is significantly different from that of the M cartridge in both the width direction and the length direction of the cartridge.

FIG. 1 shows the structure of a DVD-RAM cartridge.
0 is shown. In FIG. 10, a DVD-RAM cartridge 150 has a built-in recordable / reproducible disk 151 having substantially the same shape as a DVD-ROM having a diameter of 12 cm. Fifteen
Reference numeral 3 denotes a pair of alignment holes provided at an interval of a distance Ar for engaging with a positioning pin (not shown) provided on the disk device for positioning. The distance between the reference line connecting the pair of alignment holes 153 and the center of the disc is B
r. In the DVD-RAM cartridge 150, in order to prevent the DVD-RAM cartridge 150 from dropping off from the tray when used vertically, a pair of concave portions 152 are provided at a distance Gr and a depth Er on the side surface at a distance Cr from the alignment hole 153. The corner formed by the side surface having the concave portion 152 is chamfered with a radius Fr. A notch 154 is provided in a pair at a distance Dr from the alignment hole 153, and is mainly used for auto-loading.

[0011] PD cartridge 250 and DVD-RAM
When the shape of the cartridge 150 is compared with that of the cartridge 150, in FIG. 10 and FIG.
The distances Bp, Br between the 53, 153 and the center of the disc, and the alignment holes 253, 253, 153, 15
The distances Ap and Ar between the three are equal to each other in the PD cartridge 250 and the DVD-RAM cartridge 150, and have the relationship shown in (Equation 2). (Equation 2) Bp = Br = 40 [mm] Ap = Ar = 102 [mm] Also, concave portions 252 and 152 for preventing falling off when used vertically.
Cp (PD cartridge 250 side) from the alignment holes 253 and 153 on the side surface having
D-RAM cartridge 150 side) and the recess 2
Gp (PD cartridge 250)
Side) and Gr (the DVD-RAM cartridge 150 side) have the relationship shown in (Equation 3). (Equation 3) Cp <Cr (Cp = 22 [mm], Cr = 23 [m]
m]) Gp ≠ Gr (Gp = 114 [mm], Gr = 102 [m
m]) That is, the positions of the concave portions 252 and 152 are different between the PD cartridge 250 and the DVD-RAM cartridge 150, and the distance from the alignment holes 253 and 153 on the side surface having the concave portions 252 and 152 is DVD-RA.
M cartridge 150 is better than PD cartridge 250
Greater than.

For this reason, in the prior art, a DVD-RAM
Even if a protrusion is formed on the tray to engage with the falling-off preventing recess 152 of the cartridge 150, the protrusion contacts the PD cartridge 250, so that the PD cartridge 25
0 was difficult to mount on the tray. Conversely, even if a protrusion for engaging with the falling-off preventing recess 252 of the PD cartridge 250 is formed on the tray, the protrusion is not
DVD-R to contact RAM cartridge 150
It was difficult to mount the AM cartridge 150 on the tray. Further, the PD cartridge 250 is positioned at a position shifted from the position to be roughly positioned in a direction approaching the falling-off preventing convex portion provided on the tray by a difference between the distance Cr and the distance Cp. When the cartridge 250 was loaded in the housing, it was difficult to position the PD cartridge 250 in the housing.

For this reason, the PD cartridge 250 and the DV
It is difficult to mount the D-RAM cartridge 150 on the same tray and to perform both positioning of each cartridge and prevention of falling off when used vertically.

In view of the above, the present invention provides a method of positioning cartridges for different types of cartridges and a horizontal or vertical use of a disk drive without impairing features such as parts saving and operability of a tray loading system. It is an object of the present invention to provide a disk device capable of performing both measures.

[0015]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a disk, a first cartridge accommodating the disk, and a recess provided in a part of a side surface, and accommodating the disk; A second cartridge provided with a concave portion at a side position different from the concave portion of the first cartridge, and a tray for mounting the first and second cartridges, wherein the tray is a It has a first projection engaging with the recess and a second projection engaging with the recess of the second cartridge.

With this configuration, the positioning of the cartridges for different types of cartridges having different shapes and the compatibility with the horizontal or vertical use of the disk device can be achieved without impairing the features of the tray loading system such as parts saving and operability. It can be carried out.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a disk, a first cartridge accommodating the disk, and a concave portion provided on a part of a side surface, and a concave portion of the first cartridge accommodating the disk. A second cartridge provided with a concave portion at a different side position; and a tray for mounting the first and second cartridges, wherein the tray has a first convex portion that engages with the concave portion of the first cartridge. And a second convex portion that engages with the concave portion of the second cartridge.

With this configuration, the first cartridge can be positioned and supported by being placed on the tray such that the concave portion engages with the first convex portion of the tray. The cartridge can be positioned and supported by placing it on the tray such that its concave portion engages with the second convex portion of the tray.

Further, according to the present invention, in the disk device according to the first aspect, at least one of the first and second projections is supported on the tray via an elastic portion of an elastic member, and at least one of the cartridges is provided. Is displaced in a direction perpendicular to the side surface of the.

According to this configuration, when the cartridge is placed on the tray, the portions of the first and second projections that contact the cartridge are displaced in a direction perpendicular to the side surface of the cartridge. As a result, the cartridges can be mounted and supported on the tray without any trouble.

Further, the present invention is characterized in that at least one convex portion is a part of an elastic member. Further, the present invention is characterized in that the elastic member is a leaf spring.

Further, the present invention is characterized in that at least a part of the first and second projections and the elastic member is a resin integrally molded. Further, the present invention is characterized in that at least a part of the first and second protrusions and the elastic member is a part of the tray.

Further, according to the present invention, the tray includes a cartridge mounting surface on which a cartridge is mounted, a first position protruding from the cartridge mounting surface and capable of supporting an outer peripheral edge of the disc in a detachable manner. A bare disk holding member supported so as to be able to protrude and retract at a second position not protruding from the cartridge mounting surface; and a biasing member for biasing the bare disk holding member in a direction to protrude from the cartridge mounting surface. ,
The urging member is a part of an elastic member.

Further, according to the present invention, a notch is provided in at least a part of one of the cartridges, and a positioning member for engaging the notch and roughly positioning the first or second cartridge is provided on the tray. It is characterized by the following.

Further, the present invention is characterized in that the cutout portion can be used as a contact portion of a cartridge retraction means for pulling the cartridge into the apparatus. Further, the present invention is characterized in that the positioning member has a slope on the cartridge insertion side.

Further, the present invention is characterized in that the tray has a cartridge urging member that urges the concave portion of the first or second cartridge in the direction of engaging with the first or second convex portion.

Further, the present invention is characterized in that a gap is provided between the side surface of the first cartridge and the second convex portion or between the side surface of the second cartridge and the first convex portion. Further, the present invention provides a cartridge comprising: a resultant force Fc of the urging force generated by the cartridge urging member; a resultant force Fs of the urging force generated by all the first or second protrusions; a mass M of the cartridge; The following relationship (Equation 1) is set between the tray inclination level θ and the tray inclination angle θ, where the horizontal state of the tray is 0 °, and the direction in which the action point of Fs is higher than the action point of Fc is a positive direction. Is satisfied. (Equation 1) Fc> Fs + M · g · sin θ Further, according to the present invention, there is provided a disc, a cartridge for storing the disc, and a tray for mounting the cartridge.
The tray is provided with a friction member that contacts one side surface of the cartridge.

With this configuration, when the cartridge is placed on the tray, the friction member comes into contact with one side surface of the cartridge, whereby the cartridge can be positioned and supported on the tray.

Further, the present invention is characterized in that the static friction coefficient of the friction member is at least larger than that of the tray.
Further, the present invention is characterized in that the tray is provided with a cartridge urging member for bringing one side of the cartridge into contact with the friction member.

Further, according to the present invention, at least some of the four corners of the cartridge have a chamfered shape or a curved shape, and a friction member which is in contact with the chamfered shape or the curved shape is attached to the tray. It is characterized by the following.

Further, the present invention is characterized in that the friction member is a foam. (Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

FIGS. 1A to 1C are views showing the structure of a disk drive according to the first embodiment of the present invention. In FIG. 1A, reference numeral 4 denotes a tray, which is a cartridge mounting surface for mounting a PD cartridge (second cartridge) 250 (see FIG. 11) and a DVD-RAM cartridge (first cartridge) 150 (see FIG. 10). It has a surface 6 and a bare disk mounting surface 8 on which a bare disk is mounted. The bare disk mounting surface 8 is provided at a position lower than the cartridge mounting surface 6, and has a step for supporting the outer portion of the naked disk. Reference numeral 5 denotes a housing of the disk device, which internally includes a turntable for mounting a bare disk or a built-in disk of a cartridge held on the tray 4 and a pickup for performing recording or reproduction. Reference numeral 10 denotes a disk holding claw, which is attached to the cartridge urging member 13 and can be held at a position shown by a solid line and a position shown by a two-dot chain line. When the disk device is used vertically, the disk holding claw 10 is set at the position indicated by the two-dot chain line. The cartridge urging member 13 is slidably supported on the tray 4 in the direction A in the figure, and is urged by a torsion coil spring 14. Further, details of the portion B in FIG. 1A are shown in FIG.
This will be described with reference to FIG.

FIG. 1B is a partially enlarged view of a part of the disk drive according to the first embodiment of the present invention.
(C) is a side view thereof. 1B and 1C, reference numeral 15 denotes a 0.3-mm-high rib provided on the inner wall of the tray 4. When the PD cartridge 250 is placed on the tray 4, the rib 15 abuts on the side surface thereof to perform positioning in the width direction. When the DVD-RAM cartridge 150 is placed, the rib 15 of the DVD-RAM cartridge 150 holds the gripper slot 155. And is provided so as not to contact the side surface. By forming a pair of the ribs 15 on the left and right sides of the tray 4, a DVD-RAM
Width Wr of Cartridge 150 and PD Cartridge 2
A decrease in positioning accuracy due to a dimension difference of 0.6 mm from the width dimension Wp of 50 is prevented. Reference numeral 9 denotes a bare disk holding member, which is attached to the tray 4 so as to be rotatable around a rotation fulcrum 9b. FIG. 1C shows a state in which the bare disk holding member 9 does not protrude from the cartridge mounting surface 6, and is provided so as not to hinder the mounting of the cartridges 150 and 250. Further, when the bare disk holding member 9 protrudes from the cartridge mounting surface 6, the projection 9a provided at the tip of the bare disk holding member 9 supports the outer peripheral edge of the bare disk so as to be able to be freely engaged and disengaged. Prevents the bare disk from falling off even when it is in a vertical position.

The protrusion 11 for preventing the DVD-RAM cartridge from falling off is provided with the recess 15 of the DVD-RAM cartridge 150.
In a position corresponding to 2, the tray 4 is formed as a substantially rigid body with a height Hr. The height Hr of the DVD-RAM cartridge drop prevention protrusion 11 is 0.5 mm in the present embodiment. The height Hr is set to satisfy the two conditions shown in (Equation 4). Er is D
Recessed portion 1 for preventing dropping of VD-RAM cartridge 150
52 depth, Cr is DVD-RAM cartridge 150
Distance from the alignment hole 153 on the side surface at
Cp is the distance from the alignment hole 253 on the side surface of the PD cartridge 250. (Equation 4) Hr <Er Hr <Cr-Cp Further, reference numeral 12 in FIG. 1C denotes a leaf spring as an elastic member, which is made of stainless steel having a thickness of 0.12 mm to 0.15 mm. Details of the leaf spring 12 will be described with reference to FIG.

FIG. 2 is an exploded perspective view illustrating details of the leaf spring 12 according to the first embodiment of the present invention. In FIG. 2, reference numeral 12a denotes a fixing portion having a pair of positioning holes 12b. The fixing portion 12a is fitted to a projection (not shown) formed on the tray 4 and is positioned and fixed on the tray 4. It constitutes the falling-off prevention convex portion 12d. The width of the leaf spring 12 from the elastic portion 12c to the PD cartridge drop prevention protrusion 12d is 4 mm, and the width of the recess 252 of the PD cartridge 250 is 3 m.
m, the PD cartridge drop prevention protrusion 12d is formed by bending a central portion having a width of 2 mm into a C-shape, and the other portion 12e is bent to the opposite side. Thus, the width of the PD cartridge falling prevention convex portion 12d and the elastic portion 12c can be configured without being restricted by the width 252 of the concave portion of the PD cartridge 250, and the external force when the cartridges 250 and 150 are inserted into the tray 4 can be configured. The breaking strength of the leaf spring 12, such as buckling, can be sufficiently ensured. In addition, since the development dimension of the PD cartridge falling prevention convex portion 12d can be configured to be substantially the same as the development size of the other portion 12e, the shape can be easily formed even with a spring material having low extensibility. Reference numeral 12f denotes an engaging portion provided in the vicinity of the PD cartridge falling prevention convex portion 12c, which is engaged with the guide groove 16 provided in the tray 4 to regulate the projecting position of the PD cartridge falling prevention convex portion 12d. The guide groove 16 is formed so as to penetrate the tray 4 up and down.
When inserting and assembling from the lower side of the tray 4, the locking portions 12
Since f is configured to be guided in the guide groove 16, assembling workability can be improved. Reference numeral 12g denotes a PD cartridge falling prevention convex portion 12 viewed from the fixing portion 12a.
The holding member urging portion formed on the side opposite to the side d, urges the bare disk holding member 9 in a direction to protrude from the cartridge mounting surface 6.

Next, the configuration for positioning the cartridge will be described with reference to FIG. FIG. 3A is a plan view of the cartridge positioning unit 7 according to the first embodiment of the present invention, and FIG. 3B is an enlarged perspective view of the same.

In FIG. 3A, reference numeral 7 denotes a pair of cartridge positioning portions, which are formed integrally with the tray 4. FIG. 3A is a view of the portion B in FIG.
(B). As shown in FIGS. 3A and 3B, a slope 7 is provided on the cartridge insertion side of the cartridge positioning portion 7.
a, and a positioning surface 7b substantially perpendicular to the cartridge mounting surface 6 is formed on the opposite side. PD cartridge 25
When the cartridge 150 or the DVD-RAM cartridge 150 is mounted on the tray 4, the front ends of the cartridges 150 and 250 are sloped along with the operation of inserting the cartridges 150 and 250 in the direction in which the cartridge urging member 13 is pushed.
This guide is provided so that the notches 154 and 254 of the cartridges 150 and 250 can engage with the positioning surface 7b.

The operation of the disk device configured as described above will be described. Fig. 4 shows a DVD-R on the tray.
This shows a state where the AM cartridge 150 is mounted. When the DVD-RAM cartridge 150 is mounted on the tray 4, the cartridge urging member 13 urged by the torsion coil spring 14 moves the DVD-RAM cartridge 1.
50 is urged in a direction to approach the DVD-RAM cartridge falling-off prevention convex portion 11. The DVD-RAM cartridge 150 is positioned with its notch 154 engaged with the cartridge positioning portion 7 on the tray 4. In this state, the height Hr of the DVD-RAM cartridge fall prevention protrusion 11 is set to be equal to the inner wall of the tray 4 and the DVD-RAM.
The gap 11 is larger than the gap Er with the cartridge 150, and the falling-off preventing projection 11 is
0, so that the DVD-RAM cartridge 150 is prevented from falling off. In addition, the PD cartridge drop prevention protrusion 12d, which is spring-likely (elastically) supported on the tray 4, comes into contact with the side surface of the DVD-RAM cartridge 150 and bends in a direction substantially perpendicular to the side surface to escape. It does not hinder insertion and positioning of the DVD-RAM cartridge 150.

FIG. 5 shows the PD cartridge 25
0 indicates a mounted state. PD cartridge 2
When the cartridge 50 is mounted on the tray 4, the cartridge urging member 13 urged by the torsion coil spring 14 is
Urges the PD cartridge 250 in a direction to approach the PD cartridge falling prevention protrusion 12d. The notched portion 254 of the PD cartridge 250 is positioned by engaging with the cartridge positioning portion 7 on the tray 4. In this state, the PD cartridge drop prevention protrusion 12d is
It engages with the concave portion 252 of the cartridge 250. In order to ensure the reliability of the engagement, the PD cartridge falling prevention protrusion 12d bends to some extent to generate an urging force on the PD cartridge 250. Since the height Hr of the DVD-RAM cartridge fall prevention protrusion 11 is smaller than the gap dimension Ep between the inner wall of the tray 4 and the PD cartridge 250, the DVD-RAM cartridge fall prevention protrusion 11 contacts the PD cartridge 250. Therefore, the insertion and positioning of the PD cartridge 250 are not hindered.

Here, the protrusion 12 for preventing the PD cartridge from falling off.
The generated force d is set to a small value so as not to hinder the cartridge urging member 13 from pressing the cartridges 150 and 250 against the notch 254 for positioning. The setting force will be described below with reference to FIGS. 7 will be described.

FIGS. 6 and 7 show the forces acting on the tray when the cartridge is mounted according to the first embodiment of the present invention. FIG. 6A is a diagram illustrating a state in which the PD cartridge is mounted in the horizontal use state, and FIG.
FIG. 7A shows a state in which a PD cartridge is mounted in a vertical use state, and FIG. 7B shows a state in which a DVD-RAM cartridge is mounted in a vertical use state.

First, in FIG. 6A, Fcp indicates that the PD cartridge 250 is a DVD-RA mounted on the tray 4.
The resultant force of the urging force urging in the direction approaching the M cartridge drop-off preventing convex portion 11, Fsp, is the resultant force of the urging force of the PD cartridge falling-off preventing convex portion 12 d in the direction opposite to the above direction, M
p is the mass of the PD cartridge 250, and g is the gravitational acceleration. θ is the inclination angle of the tray 4, which is defined as 0 ° when the tray 4 is in a horizontal state, and the direction in which the action point of Fsp is higher than the action point of Fcp is defined as a positive direction.

Similarly, in FIG. 6B, Fcr is D
Fsr is the resultant force of the urging force for urging the VD-RAM cartridge 150 in the direction approaching the DVD-RAM cartridge drop prevention protrusion 11 provided on the tray 4, and Fsr is the same as the direction of the PD cartridge drop prevention protrusion 12d. Is the resultant of the opposing biasing forces, and Mr is the mass of the DVD-RAM cartridge 150.

The same applies to FIGS. 7A and 7B. With the above-described configuration, if the urging force of the cartridge urging member 13 and the urging force of the PD cartridge drop prevention convex portion 12d give a spring urging force that satisfies both of the following (Equation 5), the PD cartridge 250 and the DVD -RA
Even two types of cartridges having different shapes such as the M cartridge 150 can be roughly positioned in the tray 4, and the cartridge drop prevention protrusions 11 and 12 can reliably prevent the cartridge from falling. (Equation 5) Fcp> Fsp + Mp · g · sin θ Fcr> Fsr + Mr · g · sin θ Here, the value of the tilt angle θ of the tray 4 is satisfied at least at ± 15 ° although it depends on the allowable tilt value of the disk device. Is set to

As described above, according to the present embodiment, a DVD-RAM cartridge 150 as a first cartridge having a concave portion 152 for preventing falling off on a part of a side surface,
The DVD-RAM cartridge 150 is provided with a concave portion 252 at a position different from the concave portion 152. The PD cartridge 250 serving as a second cartridge has a concave portion 252. The first convex portion (DVD-RAM cartridge falling-preventing convex portion 11) engaging with the concave portion 152 for preventing the RAM cartridge 150 from falling off and the elastically held by the tray 4 when the DVD-RAM cartridge 150 is mounted. By providing a second convex portion (a PD cartridge falling prevention convex portion 12d) which can bend and can be engaged with the falling prevention concave portion 252 of the PD cartridge 250 when the PD cartridge 250 is mounted. Each of the recesses 1 has a simple structure without impairing the operability of the tray loading method. Both the DVD-RAM cartridge 150 and the PD cartridge 250, which are different types of cartridges provided at positions 2252 different in the width direction and the length direction, fall off the tray 4 when used horizontally or vertically. Can be prevented.

Further, the number of parts can be increased by integrally forming the PD cartridge drop-off preventing convex portion 12d as the second convex portion and the member for urging the bare disk holding member 9 with the plate spring 12. Thus, the above effects can be obtained.

The DVD-R as the first convex portion
By forming the projecting height of the AM cartridge drop-off preventing convex portion 11 so as not to contact the PD cartridge 250, the first convex portion can be formed integrally with the tray as a rigid body.

The DVD-RAM cartridge 150
And alignment holes 153 formed on the side surface of the PD cartridge 250 and serving as positioning reference holes.
By forming the cartridge positioning portion 7 on the tray 4 to be engaged with the notches 154 and 254 for autoloading which are approximately equal in distance from the DVD-RA,
The M cartridge 150 and the PD cartridge 250 can be roughly positioned in the tray 4.

Further, by forming a slope on the cartridge insertion side of the cartridge positioning section 7, the DVD-R
AM cartridge 150 or PD cartridge 15
0 can be easily mounted on the tray 4.

In the present embodiment, the PD cartridge drop-preventing convex portion 12d and the elastic portion 12c are constituted by the integral leaf spring 12, but the elastic portion is constituted by the leaf spring and the PD
The same effect can be obtained even if the cartridge drop prevention projection is integrally formed of a synthetic resin formed by outsert molding to this leaf spring. Also, the elastic portion and the entirety of the PD cartridge fall prevention protrusion can be made of synthetic resin, and further, they can be formed integrally with the tray.

In this embodiment, the urging force F
The sp and the urging force Fsr are the protrusions 1 for preventing the PD cartridge from falling off.
This is an urging force generated in 2d, and the DVD-RAM cartridge drop prevention protrusion 11 does not generate an urging force because it does not come into contact with the PD cartridge 250 and the DVD-RAM cartridge 150. However, the present invention is not limited to this. For example, when the DVD-RAM cartridge falling prevention convex portion 11 is also formed of an elastic body or the like that generates an urging force, it goes without saying that the urging forces Fsp and Fsr include this urging force.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. FIG.
(A), (b) is a plan view of a disk device according to a second embodiment of the present invention.

8 (a) and 8 (b), the housing 5, the cartridge mounting surface 6, the cartridge positioning portion 7, the bare disk mounting surface 8, the bare disk holding member 9, the disk holding claw 10, and the cartridge urging. Each component of the member 13 and the torsion coil spring 14 is the same as the configuration described in the first embodiment of the present invention. The details of the DVD-RAM cartridge 150 and the PD cartridge 250 are the same as those already described.

Reference numeral 50 denotes a tray, and reference numeral 60 denotes a foam. The foam 60 has a root portion adhered to the inner wall of the tray 50 with an adhesive to be fixed. The material is EDPM (ethylene propylene rubber) foam. This EDPM foam is
It can be compressed by 50% or more, and has a higher static friction coefficient on the surface than a synthetic resin tray. The foam body 60 is a DVD-RAM cartridge 150 and P
It is at a position where it comes into contact with a curved surface portion (referred to as a corner R portion) of the D cartridge 250. The positional relationship between the foam 60 and the corners R of the DVD-RAM cartridge 150 and the PD cartridge 250 will be described with reference to FIG.

FIGS. 9A and 9B are partially enlarged views showing the positional relationship between the foam 60 and the corners R of the cartridges 150 and 250. FIG. In FIGS. 9A and 9B, the DVD
-Alignment hole 15 of RAM cartridge 150
The distance Cr from 3 to the side including the concave portion 152 is 1 mm larger than the distance Cp from the alignment hole 253 of the PD cartridge 250 to the concave portion 252. However,
Since the R (radius of curvature) of the corner formed by the side surface including the concave portion 152 of the DVD-RAM cartridge 150 is Fr and is larger than the R (radius of curvature) Fp of the similar corner of the PD cartridge 250, the corner is Pass through places that are close to each other. In the present embodiment, the DVD-RAM cartridge 1
The radius of curvature Fr at the corner of No. 50 is 4 mm, and the radius of curvature Fp at the corner of the PD cartridge 250 is 2 mm.

When the PD cartridge 250 is mounted on the tray 50, the foam 60 is
When the disc cartridge 50 is brought into a compressed state (indicated by the symbol 60a), a static frictional force is generated between the foam 60 and the PD cartridge 250, and the PD cartridge 250 remains in the tray 50 even when the disk device is used vertically. Never fall off.

Even when the DVD-RAM cartridge 150 is mounted on the tray 50, the PD cartridge 2
As in the case of 50, the foam 60 comes into contact with the DVD-RAM cartridge 150 and is brought into a compressed state (indicated by a symbol 60b), so that a static friction force is generated between the foam 60 and the DVD-RAM cartridge 150. This occurs, and the DVD-RAM cartridge 150 does not fall off the tray 50 even when the disk device is used vertically.

As described above, since the distance between the corners of the PD cartridge 250 and the corners of the tray of the DVD-RAM cartridge 150 and the corner of the tray are substantially equal to each other, the amount of compressive deformation of the foam 60 and the generated static friction force are reduced. Both can be set to substantially the same size.

Regarding the relationship between the forces generated in the tray 50, the cartridge urging member 13 generated by the foam 60 is used.
Considering the component force generated in the opposite direction to the urging force, if a spring urging force that satisfies the same relationship as in the first embodiment is given,
Even two types of cartridges 150 and 250 having different shapes such as the PD cartridge 250 and the DVD-RAM cartridge 150 can be roughly positioned in the tray 50, and the static friction force generated between the cartridge 50 and the foam 60 causes It is possible to reliably prevent the cartridges 150 and 250 from falling off. In addition, since the gap originally existing in the conventional technique is used, the tray 50 can be realized without changing the outer shape.

As described above, according to this embodiment, the friction member can be displaced by the gap between the inner wall of the tray 50 and one side surface of the DVD-RAM cartridge 150 and the PD cartridge 250. By arranging the foam 60 as the inner wall of the tray 50,
Both the DVD-RAM cartridge 150 and the PD cartridge 250 can be prevented from falling off even when the disk device is used vertically, due to the static frictional force generated between the foam member 60 and the DVD-RAM cartridge 150. Further, the foam 60 as the friction member is disposed on the inner wall of the tray 50 which receives the urging force generated by the cartridge urging member 13 through the cartridges 150 and 250, so that the foam 60 is in contact with the cartridges 150 and 250. In addition, a static friction force can be reliably generated.

Further, the space between the cartridges 150 and 250 is the largest among the inner walls, and the DVD-RA
M cartridge 150 or PD cartridge 250
By disposing the foam body 60 at a position where the difference in the amount of displacement of the foam body 60 at the time of mounting is small and which comes into contact with the corner formed by the side surface having the falling-off prevention concave portions 152 and 252 during vertical use, any of the cartridges 150 , 250 can generate substantially the same static friction force.

Further, by using the foam 60 as the friction member, displacement within the gap between the inner wall of the tray 50 and the corners of the cartridges 150 and 250, which existed in the prior art, becomes possible. Compared to the technique of the above, two types of cartridges 150 and 25 having different shapes even when used horizontally or vertically without changing the outer shape of the tray 50.
0 from the tray 50 can be prevented.

[0063]

As described above, according to the present invention, a disk, a first cartridge accommodating the disk, and a recess provided on a part of a side surface, and a first cartridge accommodating the disk, A second cartridge provided with a concave portion at a side position different from that of the concave portion, and a tray for mounting the first and second cartridges, wherein the tray is engaged with the concave portion of the first cartridge. A first projection,
By providing the second cartridge with the second protrusion engaging with the recess of the second cartridge, any of the different types of cartridges can be positioned and supported on the tray, even when used horizontally or vertically. An advantageous effect is obtained that the cartridge can be prevented from falling off.

Further, at least one of the first and second projections is supported by a tray via an elastic portion of an elastic member, and is displaced in a direction perpendicular to a side surface of at least one of the cartridges. By doing so, the cartridge can be placed and supported on the tray without any trouble.

Further, by making at least one of the projections a part of the elastic member, the number of parts can be reduced as compared with a case where a projection is separately provided. Further, by forming the elastic member with a leaf spring, the convex portion can be pressed well against the cartridge.

Further, by forming at least a part of the first and second projections and the elastic member with a resin molded integrally, the manufacturing cost can be reduced. Further, the number of parts can be reduced by configuring at least a part of the first and second convex portions and the elastic member with a part of the tray.

Further, a cartridge mounting surface on which a cartridge is mounted on the tray, a first position protruding from the cartridge mounting surface and capable of supporting the outer peripheral edge of the disc in a detachable manner, and a position from the cartridge mounting surface. A bare disk holding member supported so as to be able to protrude and retract at a second position that does not protrude,
An urging member for urging the bare disk holding member in a direction in which the bare disk holding member protrudes from the cartridge mounting surface, wherein the urging member is a part of an elastic member, so that the naked disk can be held well. Since the urging member is a part of the elastic member, the number of components can be reduced.

Further, a notch is provided in a part of at least one of the cartridges, and a positioning member which engages with the notch and approximately positions the first or second cartridge is provided on the tray. The first and second cartridges can be substantially positioned within the tray.

Further, since the notch portion is used as a contact portion of the cartridge retraction device for retrieving the cartridge into the apparatus, it is not necessary to separately provide a contact portion of the cartridge retraction device.

Further, by forming an inclined surface on the cartridge insertion side of the positioning member, the first and second cartridges can be easily mounted on the tray. Further, by providing the tray with a cartridge urging member that urges the concave portion of the first or second cartridge in the direction of engaging with the first or second convex portion, the cartridge can be used in horizontal or vertical use. Dropping can be reliably prevented.

Further, according to the present invention, the resultant force Fc of the urging force generated by the cartridge urging member, the resultant force Fs of the urging force generated by all the first or second projections, the mass M of the cartridge, Fc> Fs + M · between the acceleration g and the tray inclination angle θ where the direction in which the tray is horizontal is 0 ° and the point of application of the Fs is higher than the point of application of the Fc is a positive direction. By configuring so that the relationship of g · sin θ is satisfied, it is possible to more reliably prevent the cartridge from falling off when used horizontally or vertically.

Further, the first and second discs are provided with a disc, a cartridge for accommodating the disc, a tray for mounting the cartridge, and a friction member abutting on one side of the cartridge. Any of the cartridges can prevent the cartridge from falling off even when used horizontally or vertically due to the static friction force generated between the cartridge and the friction member.

Further, by using a friction member whose static friction coefficient is at least larger than that of the tray or by providing the tray with a cartridge urging member for bringing one side of the cartridge into contact with the friction member, Static frictional force can be reliably generated between the cartridge and the cartridge, and the cartridge can be more reliably prevented from falling off.

Further, the gap between the inner wall of the tray and the cartridge is the largest, and the difference in the amount of displacement of the friction member when the first or second cartridge is mounted is small.
By arranging the friction member at a position in contact with a corner formed by a side surface having a concave portion of the cartridge, substantially the same static friction force can be generated regardless of which cartridge is mounted.

Further, by using the foam as the friction member, the displacement in the range of the gap between the inner wall of the tray and the corner of the cartridge, which has existed in the prior art, becomes possible.
Compared to conventional technology, without changing the outer shape of the tray,
Even when used horizontally or vertically, the first and second cartridges can be prevented from falling off the tray.

[Brief description of the drawings]

FIG. 1A is a plan view of a disk device according to a first embodiment of the present invention. FIG. 1B is a partially enlarged view of the disk device. FIG.

FIG. 2 is an exploded perspective view of a leaf spring according to the first embodiment of the present invention.

FIG. 3A is a plan view of a cartridge positioning portion according to the first embodiment of the present invention. FIG. 3B is an enlarged perspective view of the cartridge positioning portion.

FIGS. 4A and 4B are configuration diagrams showing a state in which a DVD-RAM cartridge is mounted on a disk device according to the first embodiment of the present invention; FIGS.

FIGS. 5A and 5B are configuration diagrams showing a state where a PD cartridge is mounted on the disk device according to the first embodiment of the present invention, respectively.

FIG. 6 (a) is an explanatory view showing a force applied to a PD cartridge in a horizontal use state of the disk device according to the first embodiment of the present invention; and (b) a force applied to a DVD-RAM cartridge in a horizontal use state of the disk device. Explanatory diagram showing

FIG. 7 (a) is an explanatory view showing a force acting on a PD cartridge in a vertical use state of the disk device according to the first embodiment of the present invention. (B) A force acting on a DVD-RAM cartridge in a vertical use state of the device. Explanatory diagram showing

8A is a plan view of a disk device according to a second embodiment of the present invention, and FIG. 8B is a partially enlarged view of the disk device.

FIG. 9A is a partially enlarged view showing a positional relationship between a foam and a square curved surface of a PD cartridge according to a second embodiment of the present invention. FIG. 9B is a partially enlarged view of the foam and a square curved surface of a DVD-RAM cartridge. Partial enlarged view showing the positional relationship with

10A is a plan view of a DVD-RAM cartridge, FIG. 10B is a side view of the DVD-RAM cartridge, and FIG. 10C is a front view of the DVD-RAM cartridge.

11A is a plan view of a PD cartridge. FIG. 11B is a side view of the PD cartridge. FIG. 11C is a front view of the PD cartridge.

FIG. 12A is a plan view of a conventional disk device. FIG. 12B is a side view of the disk device.

FIG. 13A is a plan view showing a state where a PD cartridge is mounted on a conventional disk device. FIG. 13B is a side view showing the same state.

[Explanation of symbols]

4, 50 tray 5 housing 6 cartridge mounting surface 7 cartridge positioning portion 7a slope 7b positioning surface 8 bare disk mounting surface 9 bare disk holding member 11 DVD-RAM cartridge falling prevention convex portion (first convex portion) 12 plate Spring (elastic member) 12c Elastic portion 12d PD cartridge falling prevention convex portion (second convex portion) 13 Cartridge urging member 14 Torsion coil spring 60 Foam (friction member) 150 DVD-RAM cartridge (first cartridge) 152 DVD -Captive recess 154 of RAM cartridge 154 Cutout of DVD-RAM cartridge 250 PD cartridge (second cartridge) 252 Captive recess of PD cartridge 254 Cutout of PD cartridge

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) G11B 17/04 511 G11B 17/04 511N (72) Inventor Masio Maruyama 1006 Kadoma, Oaza, Kadoma, Osaka Matsushita Electric Within Sangyo Co., Ltd. (72) Inventor Yoshiteru Namoto 1006 Kazuma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5D046 CB11 EA08 EA11 FA04 FA07 HA01

Claims (18)

[Claims] 1. A disc, a first cartridge accommodating the disc, and a recess provided on a part of a side surface, and a recess at a side position different from the recess of the first cartridge, accommodating the disc. A second cartridge provided, and a tray on which the first and second cartridges are placed, wherein the tray has a first convex portion that engages with a concave portion of the first cartridge; And a second projection engaging with the recess of the cartridge. 2. At least one of the first and second projections is supported by a tray via an elastic portion of an elastic member, and is displaced in a direction perpendicular to a side surface of at least one of the cartridges. 2. The disk device according to claim 1, wherein: 3. The disk device according to claim 2, wherein at least one of the protrusions is a part of an elastic member. 4. The disk device according to claim 2, wherein the elastic member is a leaf spring. 5. The disk device according to claim 2, wherein at least a part of the first and second projections and the elastic member is a resin formed integrally. 6. The disk device according to claim 2, wherein at least a part of the first and second projections and the elastic member is a part of a tray. 7. A tray on which a cartridge is mounted.
A cartridge mounting surface, a first position protruding from the cartridge mounting surface and capable of detachably supporting an outer peripheral edge of the disc, and a second position not protruding from the cartridge mounting surface are supported so as to be freely retractable. A bare disk holding member, and a biasing member that biases the bare disk holding member in a direction to protrude from the cartridge mounting surface, wherein the biasing member is a part of an elastic member. The disk device according to claim 2. 8. A tray provided with a notch in at least a part of at least one of the cartridges, and a positioning member which engages with the notch and roughly positions the first or second cartridge is provided on the tray. Claims 1 to 7
The disk device according to any one of the above. 9. The disk device according to claim 8, wherein the notch portion can be used as a contact portion of a cartridge retraction unit that pulls the cartridge into the device. 10. The disk device according to claim 8, wherein the positioning member has a slope on the cartridge insertion side. 11. The tray according to claim 1, wherein the tray has a cartridge urging member that urges the concave portion of the first or second cartridge in the direction of engaging with the first or second convex portion. 11. The disk device according to any one of items 10. 12. The air conditioner according to claim 1, wherein a gap is provided between a side surface of the first cartridge and the second convex portion or between the side surface of the second cartridge and the first convex portion.
12. The disk device according to any one of 11. 13. The resultant force Fc of the urging force generated by the cartridge urging member, the resultant force Fs of the urging forces generated by all the first or second projections, and the mass M of the cartridge.
And the gravity acceleration g, and the state where the tray is horizontal is 0 °,
12. The following relationship (Equation 1) holds between the inclination angle θ of the tray and a direction in which the action point of the Fs is higher than the action point of the Fc, which is a positive direction.
The disk device as described above. (Equation 1) Fc> Fs + M · g · sin θ 14. A disk device comprising: a disk; a cartridge for storing the disk; a tray for mounting the cartridge; and a friction member abutting one side of the cartridge on the tray. 15. The disk device according to claim 14, wherein the coefficient of static friction of the friction member is at least larger than that of the tray. 16. The disk device according to claim 14, wherein a tray is provided with a cartridge urging member for bringing one side surface of the cartridge into contact with the friction member. 17. A cartridge having a chamfered portion or a curved portion at at least some of four corners of the cartridge, and a friction member abutting on the chamfered portion or the curved portion is attached to the tray. Claim 14
17. The disk device according to any one of claims 16 to 16. 18. The disk device according to claim 14, wherein the friction member is a foam.