JP2003196907A - Disk device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disk device which permits stable putting in and out of a disk and is easily mountable with a tray from a perpendicular direction. <P>SOLUTION: The disk device is formed with hook-like tray retainers 12 and is so formed that the retainers 12 are horizontally bent to permit mounting of the tray 2 in mounting the tray 2 on a device body 1. Grooved sections 17a of the tray 2 and the segments of rails 3 of the device body 1 to be engaged when the tray 2 is drawn out are formed to tapered shapes, as a result of which the tray 2 is stopped at the drawing out end by the friction force of the rails 11 of the tapered shape and the groove sections 17a of the tapered shape. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk device, and more particularly to a disk device including a tray for mounting a disk on a device body.

[0002]

2. Description of the Related Art Heretofore, there has been known a disk device in which a tray stored in the main body of the device is taken in and out by a motor.

FIG. 14 is a schematic front view of a device body of a conventional disk device. FIG. 15 is a side view of the disk device shown in FIG. FIG. 16 is a schematic front view of a tray of a conventional disc device. FIG. 17 is a side view of the tray shown in FIG.

Referring to FIGS. 14 and 15, a conventional disc device includes a device body 101 and a tray 102. The apparatus main body 101 has groove portions 117 (see FIGS. 16 and 17) of the tray 102 at upper and lower end portions on the inner side surface.
(Refer to FIG. 3) is fitted and a rail 103 for slidably guiding the tray 102 is provided. Also,
Inside the upper and lower surfaces, a plurality of tray retainers 1 are provided to prevent the tray 102 from tilting when the tray 102 is pulled out.
04 are provided. Further, a pair of hook-shaped stoppers 120 for stopping the tray 102 at the pull-out end are provided at the inner ends of the upper and lower surfaces. Further, the apparatus body 101 includes a belt 105 and a pulley 10.
6 and a gear 107 formed integrally with the pulley 106.
, Gear 108, pinion gear 109, and belt 10
A motor 11 for rotating the pulley 106 via
0 and are attached. The motor 110 rotates the pinion gear 109.

Next, referring to FIGS. 16 and 17, the tray 102 is a circular recess 1 for mounting a disc.
Have 13. Further, on the circumference of the circular recess 113, the protrusion 1 for holding the mounted disc 1 is formed.
14 is provided so as to protrude toward the center of the circle. A rack 115 is provided inside the upper surface of the tray 102 at a position where it engages with the pinion gear 109 (see FIG. 15) of the apparatus body 101. A tray stopper 121 is provided outside the upper and lower surfaces of the tray 102. The tray stopper 121 has a function of stopping the tray 102 by coming into contact with the hook-shaped stopper 120 of the apparatus body 101 when the tray 102 comes to the pull-out end. Further, on the tray 102, a contact portion 116 with which the tray retainer 104 of the apparatus main body 101 abuts is integrally formed vertically. On the back surface of the contact portion 116, a pair of groove portions 117 into which the rail 103 of the apparatus body 101 is fitted are formed.

18 and 19 are side views for explaining the operation of the conventional disk device when the tray is pulled out. Next, with reference to FIG. 18 and FIG. 19, an operation of the conventional disk device when the tray is pulled out will be described. When pulling out the tray 102, the motor 110 attached to the apparatus main body 101 rotates counterclockwise.
The counterclockwise drive of the motor 110 is transmitted to the pulley 106 via the belt 105. The pulley 106 to which the drive is transmitted rotates counterclockwise, and the gear 107 formed integrally with the pulley 106 also rotates counterclockwise. The counterclockwise rotation of the gear 107 corresponds to the gear 1
The pinion gear 109 is rotated counterclockwise via 08. As a result, the rotation of the pinion gear 109 is transmitted to the rack 115 of the tray 102 meshing with the pinion gear 109. As a result, as shown in FIG. 18, the tray 102 starts moving in the direction of arrow D while being guided by the rail 103 fitted in the groove 117 of the tray 102. In this case, since the tray retainer 104 of the apparatus main body 101 is in contact with the contact portion 116 of the tray 102, the tray 102 that has started moving in the direction of arrow D
Does not tilt. Then, as shown in FIG. 19, the tray stopper 121 of the tray 102 contacts the hook-shaped stopper 120 of the apparatus main body 101, so that the tray 102 is stopped at the pull-out end.

20 to 22 are enlarged views of the periphery of a hook-shaped stopper for explaining the operation at the time of assembling the conventional disk device. Next, with reference to FIG. 20 to FIG. 22, an operation of the conventional disk device at the time of assembling will be described. First, the rail 103 of the apparatus main body 101 and the tray 1
The groove part 117 of No. 02 is engaged. Then, as shown in FIG. 20, while the tray 102 is pushed in the direction of the arrow E, the taper surface 120 a of the hook-shaped stopper 120 of the apparatus main body 101 and the tray stopper 121 of the tray 102.
And abut. When the tray 102 is further pushed in the arrow E direction from this state, the hook-shaped stopper 120 of the apparatus main body 101 bends in the arrow F direction as shown in FIG. Therefore, the hook-shaped stopper 120 does not become an obstacle when the tray 102 is pushed into the apparatus main body 101. Then, as shown in FIG. 22, after the mounting, the hook-shaped stopper 120 restores its original shape and functions as a stopper.

[0008]

In the conventional disk device as described above, the tray stopper 121 of the tray 102 is brought into contact with the hook-shaped stopper 120 of the device main body 101, so that the tray 102 can be pulled out. It was stopped. In this case, the impact at the moment when the tray stopper 121 comes into contact with the hook-shaped stopper 120 of the apparatus body 101 becomes large. For this reason, there is a problem that the vibration at the time when the tray 102 is stopped at the pull-out end becomes large, and as a result, the disc falls from the tray 102.

Another structure of the conventional disk device is
JP-A-11-39761, JP-A-11-3976
No. 2, JP-A-11-167760 and JP-A-2000-21057. Japanese Laid-Open Patent Publication No. 11-39761 discloses a mechanism in which, when a disc tray is stored in the apparatus body, the inclination of the disc mounted on the tray is corrected vertically. Further, Japanese Patent Application Laid-Open No. 11-39762 discloses a structure in which a disk is held by providing a tapered protrusion on the edge of a circular recess for mounting the disk. Further, Japanese Patent Application Laid-Open No. 11-167760 discloses a mechanism for holding a disc by an urging force applied to the disc pressing lever. In addition, Japanese Patent Laid-Open No. 2000-21057
The publication discloses a structure in which a disk is mounted by forming an inner peripheral surface of a circular concave portion for mounting a disk into a tapered surface and moving the disk while sliding on the tapered surface. There is.

However, the above-mentioned Japanese Patent Laid-Open No. 11-3976.
1, JP-A-11-39762, JP-A-11-39762
-167760 and JP-A-2000-21057.
In each of the disk devices disclosed in the publication, a mechanism for reducing the tray withdrawal speed immediately before the tray stops at the tray withdrawal end is not provided.
As in the conventional disc device shown in FIG. 15, there is a problem that the disc may drop due to the vibration when the tray is stopped.

The present invention has been made to solve the above problems, and one object of the present invention is to:
An object of the present invention is to provide a disc device capable of stably loading and unloading a disc.

Another object of the present invention is to easily mount the tray vertically from the disk device.

[0013]

In order to achieve the above object, in a disk device according to a first aspect of the present invention, a disk is placed, and a tray having a groove portion and a groove portion of the tray are fitted and slid. In a disc device including a rail portion and a device body having a tray retainer for preventing the tray from tilting when the tray is pulled out, the tray retainer is formed in a hook shape, and the tray is attached to the device body. At this time, the hook-shaped tray retainer is configured to bend laterally so that the tray can be mounted. Of the groove portion of the tray and the rail portion of the main body of the device, the portion that engages when the tray is pulled out is tapered. The tray is stopped at the drawer end due to the frictional force between the tapered portion of the rail and the tapered portion of the groove. The features.

According to the first aspect of the present invention, as described above, the tapered portion of the rail portion is formed by forming the portion of the groove portion of the tray and the rail portion of the apparatus main body that engages when the tray is pulled out. By configuring the tray to stop at the pull-out end by the frictional force between the groove and the tapered portion of the groove, the tray can be smoothly stopped at the pull-out end when the disc is taken out. As a result, the vibration when the tray is stopped at the pull-out end can be further reduced, so that the drop of the disk due to the vibration of the tray can be effectively prevented. As a result, the disc can be stably taken in and out. Further, by configuring the hook-shaped tray retainer to bend laterally so that the tray can be mounted, the tray can be mounted not in the horizontal direction but in the vertical direction. The tray can be vertically mounted at a position where the wide portion of the groove is engaged with the tapered portion.

According to a second aspect of the present invention, there is provided a disc device in which a disc is placed, a tray having a first engaging portion, a second engaging portion which engages with the first engaging portion of the tray, and a tray are pulled out. In a disc device including a device body having a tray retainer for preventing the tray from tilting, the first engaging portion of the tray and the second engaging portion of the device body are engaged when the tray is pulled out. The tray is stopped at the pull-out end by the frictional force by forming the portions into a shape in which the frictional force is generated between them.

According to a second aspect of the present invention, as described above, the first engaging portion of the tray and the second engaging portion of the apparatus main body are formed in a shape in which the engaging portions when the tray is pulled out are in a shape in which frictional forces are generated between them. By configuring so that the tray is stopped at the drawer end by the frictional force,
When removing a disc, the tray can be stopped smoothly at the pull-out end. As a result, the vibration when the tray is stopped at the pull-out end can be further reduced, so that the drop of the disk due to the vibration of the tray can be effectively prevented. As a result, the disc can be stably taken in and out.

According to a third aspect of the present invention, in the structure of the second aspect, the first engaging portion includes a groove portion, and the second engaging portion includes a rail portion into which the groove portion is fitted and slid. The shape in which the frictional force is generated includes a taper shape formed in a portion of the groove portion of the tray and the rail portion of the apparatus main body that is engaged when the tray is pulled out. According to this structure, since the frictional force can be easily generated by the taper shape, the tray can be smoothly stopped at the pull-out end when the disc is taken out.

According to a fourth aspect of the invention, in the disk device according to the second or third aspect, the tray retainer is formed in a hook shape, and the hook-like tray retainer is laterally mounted when the tray is mounted on the apparatus main body. The tray is bent so that the tray can be mounted. According to this structure, since the tray can be mounted from the vertical direction instead of the horizontal direction, it is possible to easily mount the tray at the position where the wide portion of the groove portion engages with the wide tapered portion of the rail portion. , The tray can be mounted vertically.

According to a fifth aspect of the present invention, in the disk device according to the second or third aspect, the notch is provided in a portion corresponding to the tray retainer at both ends in the lateral direction of the tray and has a width larger than the width of the tray retainer. Further, the notch portion is formed such that one end portion and the other end portion in the lateral direction of the tray have different formation positions. According to this structure, since the tray can be mounted from the vertical direction instead of the horizontal direction, it is possible to easily mount the tray at the position where the wide portion of the groove portion engages with the wide tapered portion of the rail portion. , The tray can be mounted vertically. Further, by forming the cut portion so that the forming position is different between one end portion in the short side direction of the tray and the other end portion, it is possible to prevent the tray from coming off in the vertical direction.

[0020]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a perspective view showing a schematic configuration of a disk device according to a first embodiment of the present invention. FIG. 2 is a front view of the device body of the disk device according to the first embodiment shown in FIG. FIG. 3 is a side view of the device body of the disk device according to the first embodiment shown in FIG. FIG. 4 is a front view of the tray of the disc device according to the first embodiment shown in FIG. FIG. 5 is a side view of the tray of the disc device according to the first embodiment shown in FIG.

First, the structure of the disk device according to the first embodiment will be described with reference to FIGS. The disc device according to the first embodiment includes a device body 1 and a tray 2.
It has and. This device body 1 includes
As shown in, the groove portion 17 (see FIGS. 4 and 5) of the tray 2 is fitted in the upper and lower end portions on the inner side surface, and
A rail 3 for slidably guiding the tray 2 is provided. Further, inside the upper and lower surfaces, a plurality of tray retainers 4 are provided to prevent the tray 2 from tilting when the tray 2 is pulled out. In addition, in the device body 1,
A belt 5, a pulley 6, a gear 7 formed integrally with the pulley 6, a gear 8, a pinion gear 9, and a motor 10 for rotating the pulley 6 via the belt 5 are attached. . The motor 10 rotates the pinion gear 9.

Here, in the first embodiment, as shown in FIG. 3, the apparatus main body 1 is provided with a pair of tapered rails 11 at the upper and lower ends of the inside of the side surface. The tapered rail 11 is an example of the “shape in which frictional force is generated” in the present invention. Further, the apparatus body 1 is provided with two hook-shaped tray retainers 12 at the inner ends of the upper and lower surfaces.

Next, as shown in FIGS. 4 and 5, the tray 2 has a circular recess 13 for mounting a disc. Further, on the circumference of the circular concave portion 13, a projection 14 for holding the mounted disk is provided so as to project toward the center of the circle. A rack 15 is provided inside the upper surface of the tray 2 at a position where it engages with the pinion gear 9 (see FIG. 3) of the apparatus body 1.
Further, the tray 2 has contact portions 16 formed integrally in the vertical direction. The tray retainer 4 of the apparatus body 1 and the hook-shaped tray retainer 12 are in contact with the contact portion 16.
Further, a pair of groove portions 17 into which the rail 3 of the apparatus body 1 and the tapered rail 11 are fitted are formed on the back surface of the contact portion 16.

Here, in the first embodiment, in the groove portion 17 of the tray 2, when the tray 2 is pulled out, the tapered rail 11 of the apparatus main body 1 (see FIG.
The taper part 17a which engages with (refer to) is formed. The tapered portion 17a is an example of the “shape in which frictional force is generated” and the “tapered groove portion” of the present invention. A wide portion 17b is provided in the groove portion 17 of the tray 2 so that the wide tapered rail 11 and the groove portion 17 of the tray 2 are engaged with each other.

6 and 7 are side views for explaining the operation of the disk device according to the first embodiment of the present invention when the tray is pulled out. Next, with reference to FIG. 6 and FIG. 7, an operation when the tray 2 of the disc device according to the first embodiment is pulled out will be described. When pulling out the tray 2, the motor 10 attached to the apparatus body 1 rotates counterclockwise. The counterclockwise drive of the motor 10 is transmitted to the pulley 6 via the belt 5. The pulley 6 to which the drive is transmitted rotates counterclockwise, and the gear 7 formed integrally with the pulley 6 also rotates counterclockwise. The counterclockwise rotation of the gear 7 is transmitted through the gear 8
The pinion gear 9 is rotated counterclockwise. As a result, the rotation of the pinion gear 9 is transmitted to the rack 15 of the tray 2 meshing with the pinion gear 9. As a result, as shown in FIG. 6, the tray 2 has the groove portion 1 of the tray 2.
In the state of being guided by the rail 3 of the apparatus main body 1 and the tapered rail 11 fitted in 7, the movement in the arrow A direction is started.

In this case, the tray retainer 4 of the apparatus main body 1
The hook-shaped tray retainer 12 and the contact portion 16 of the tray 2 are
Since the tray 2 is in contact with the tray 2, the tray 2 that has started moving in the direction of arrow A does not tilt. After that, as shown in FIG. 7, the tapered portion 17 a of the groove portion 17 of the tray 2 and the tapered rail 11 of the apparatus main body 1 are engaged with each other. At this time, a frictional force is generated between the taper portion 17a of the groove portion 17 of the tray 2 and the tapered rail 11 of the apparatus body 1 which are engaged with each other. Due to the generated frictional force, the tray 2 stops smoothly at the pulling end while decelerating.

As described above, in the disk device according to the first embodiment, the tray 2 can be smoothly stopped while decelerating at the pull-out end, so that the vibration when the tray 2 is stopped at the pull-out end is further reduced. be able to.
As a result, it is possible to effectively prevent the disc from dropping due to the vibration of the tray 2, so that the disc can be stably taken in and out.

FIG. 8 is a side view for explaining the assembling operation of the disk device according to the first embodiment of the present invention. 9 to 11 are enlarged views around the hook-shaped tray retainer for explaining the operation at the time of assembling the disc device according to the first embodiment of the present invention. Next, FIGS.
The operation of assembling the disk device will be described with reference to FIG. When the tray 2 is attached to the device body 1, the device body 1
And the tray 2 are arranged at opposite positions. In this plane position, as shown in FIG. 8, the wide portion 17b of the groove 17 is arranged on the tapered rail 11 so that the tapered rail 11 can be inserted into the groove 17. Further, as shown in FIG. 8, the end 2a of the tray 2 is
However, do not touch the tray retainer 4. In this state, the tray 2 is pushed in vertically to the side surface of the apparatus body 1.

At this time, as shown in FIG. 9, first, the tray 2 and the tapered surface 12a of the hook-shaped tray retainer 12 come into contact with each other. Then, when the tray 2 is further pushed in, the hook-shaped tray retainer 12 bends in the direction of arrow B, as shown in FIG. As a result, the hook-shaped tray retainer 12
Does not become an obstacle when the tray 2 is pushed into the apparatus body 1. Then, as shown in FIG. 11, after the mounting is completed, the hook-shaped tray retainer 12 is restored to the original shape and functions as a tray retainer. According to this structure, the tray 2 can be attached to the side surface of the apparatus main body 1 not in the horizontal direction but in the vertical direction, so that the tray 2 can be easily attached to the wide rail 11 of the apparatus main body 1. The tray 2 can be mounted from the vertical direction at a position where the wide portion 17b of the groove 17 is engaged.

(Second Embodiment) FIGS. 12 and 13 show
FIG. 11 is a side view for explaining an operation when assembling the disc device according to the second embodiment of the present invention. With reference to FIGS. 12 and 13, in the disc device according to the second embodiment, the hook-shaped tray retainer 12 of the first embodiment described above is replaced with two upper and lower contact portions 16 of the tray 2. Two notches 16a and 16b are provided.

That is, in the second embodiment, the upper and lower abutting portions 16 of the tray 2 are provided with two notches 16a and 16b each having a width larger than that of the tray retainer 4.
They are provided one by one. Notches 16a and 16b
Are provided such that their forming positions are displaced from each other. The portion where the hook-shaped tray retainer 12 (see FIG. 3) of the first embodiment is provided is not the hook-like tray retainer 4 having the same shape as the tray retainer 4 provided at another position.
Is provided. The other structure of the second embodiment is similar to that of the first embodiment.

Next, the operation at the time of assembling in the second embodiment will be described. When attaching the tray 2 to the device body 1,
The apparatus main body 1 and the tray 2 are arranged at positions facing each other. Then, as shown in FIG. 12, the lower contact portion 16 of the tray 2 is
The cutout portion 16b of the device main body 1 coincides with the position of the tray retainer 4 of the device main body 1, and the tapered rail 11 of the device main body 1 is engaged with the wide portion 17b of the groove 17 of the tray 2 at the device main body 1 Push the bottom of Tray 2 into. And, a tapered rail 11 at the bottom of the device body 1,
After the wide portion 17b of the groove portion 17 of the tray 2 is engaged, the tray 2 is moved in the arrow C direction. Then, as shown in FIG. 13, when the notch 16 a in the upper portion of the tray 2 coincides with the position of the tray retainer 4 of the apparatus body 1, the tray 2 is pushed into the apparatus body 1.

According to this structure, the tray 2 can be mounted not in the horizontal direction but in the vertical direction, so that the wide taper rail 11 of the apparatus main body 1 can be easily mounted.
At the position where the wide portion 17b of the groove portion 17 of the tray 2 is engaged,
The tray 2 can be mounted vertically. Also,
By forming the upper cut portion 16a and the lower cut portion 16b at different positions, it is possible to prevent the tray 2 from coming off when the tray 2 is pulled out.

The other effects of the second embodiment are similar to those of the first embodiment.

It should be understood that the embodiments disclosed this time are exemplifications in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiments but by the scope of claims for patent, and includes meaning equivalent to the scope of claims for patent and all modifications within the scope.

For example, in the first and second embodiments,
By engaging the tapered rail 11 of the apparatus body 1 and the tapered portion 17a of the groove portion 17 of the tray 2,
Although the frictional force is generated and the tray 2 is smoothly stopped at the pull-out end, the present invention is not limited to this, and the frictional force may be generated to stop the tray 2 by another shape. Good.

Further, in the above embodiment, the apparatus main body having the hook-shaped tray retainer or the tray having the notch is used to mount the tray on the apparatus main body from the vertical direction, but the present invention is not limited to this. Instead, the tray may be vertically mounted by another tray mounting means.

[0039]

As described above, according to the present invention, the disc can be stably taken in and out, and the tray can be easily mounted from the vertical direction.

[Brief description of drawings]

FIG. 1 is a perspective view showing a schematic configuration of a disk device according to a first embodiment of the present invention.

FIG. 2 is a front view of the device body of the disk device according to the first embodiment shown in FIG.

3 is a side view of a device body of the disc device according to the first embodiment shown in FIG. 2. FIG.

4 is a front view of the tray of the disc device according to the first embodiment shown in FIG. 1. FIG.

5 is a side view of the tray of the disc device according to the first embodiment shown in FIG. 4. FIG.

FIG. 6 is a side view for explaining the operation when the tray of the disc device according to the first embodiment of the present invention is pulled out.

FIG. 7 is a side view for explaining the operation when the tray of the disc device according to the first embodiment of the present invention is pulled out.

FIG. 8 is a side view for explaining an operation at the time of assembling the disc device according to the first embodiment of the present invention.

FIG. 9 is an enlarged view of the periphery of a hook-shaped tray retainer for explaining the operation at the time of assembling the disc device according to the first embodiment of the present invention.

FIG. 10 is an enlarged view of the periphery of a hook-shaped tray retainer for explaining the operation at the time of assembling the disc device according to the first embodiment of the present invention.

FIG. 11 is an enlarged view of the periphery of the hook-shaped tray retainer for explaining the operation at the time of assembling the disc device according to the first embodiment of the present invention.

FIG. 12 is a side view for explaining an operation at the time of assembling the disc device according to the second embodiment of the present invention.

FIG. 13 is a side view for explaining an operation at the time of assembling the disc device according to the second embodiment of the present invention.

FIG. 14 is a schematic front view of a device body of a conventional disk device.

FIG. 15 is a side view of the disk device shown in FIG.

FIG. 16 is a schematic front view of a tray of a conventional disc device.

17 is a side view of the tray shown in FIG.

FIG. 18 is a side view for explaining the operation of the conventional disk device when the tray is pulled out.

FIG. 19 is a side view for explaining the operation of the conventional disk device when pulling out the tray.

FIG. 20 is an enlarged view of the periphery of a hook-shaped stopper for explaining the operation at the time of assembling the conventional disk device.

FIG. 21 is an enlarged view around a hook-shaped stopper for explaining the operation at the time of assembling the conventional disk device.

FIG. 22 is an enlarged view around a hook-shaped stopper for explaining the operation at the time of assembling the conventional disk device.

[Explanation of symbols]

1 Device Main Body 2 Tray 4 Tray Presser 11 Tapered Rail (Shape that Generates Friction Force) 12 Hook-shaped Tray Pressers 16a, 16b Notch 17 Groove 17a Tapered Part (Tapered Groove; Shape that Generates Friction)

Claims (5)

[Claims] 1. A tray for mounting a disc and having a groove portion, a rail portion in which the groove portion of the tray is fitted and slid, and a tray for preventing the tray from tilting when the tray is pulled out. In a disc device including a device main body having a presser, the tray presser is formed in a hook shape, and when the tray is mounted on the device main body, the hook-shaped tray presser bends laterally. The tray is configured so that the tray can be mounted, and the rail portion is formed by forming a portion of the groove portion of the tray and the rail portion of the apparatus main body that engages when the tray is pulled out, to thereby form the rail portion. Characterized in that the tray is stopped at the pulling-out end by a frictional force between the tapered portion and the tapered portion of the groove. Disk apparatus. 2. A tray on which a disc is placed and which has a first engaging portion, a second engaging portion which engages with the first engaging portion of the tray, and the tray is inclined when the tray is pulled out. In a disc device including a device main body having a tray retainer for preventing the above-mentioned problem, the first engaging portion of the tray and the second engaging portion of the device main body are engaged when the tray is pulled out. A disk device, wherein the tray is stopped at the pull-out end by the frictional force by forming the portions into a shape in which a frictional force is generated between them. 3. The first engaging portion includes a groove portion, the second engaging portion includes a rail portion in which the groove portion is fitted and slid, and the shape in which the frictional force is generated is the tray. 3. The disk device according to claim 2, further comprising a taper shape formed in a portion of the groove portion and the rail portion of the apparatus main body that is engaged when the tray is pulled out. 4. The tray retainer is formed in a hook shape, and when the tray is attached to the apparatus main body, the hook retainer is bent laterally so that the tray can be attached. The disk device according to claim 2 or 3, wherein the disk device is configured as described above. 5. The tray further comprises a notch portion provided at a portion corresponding to the tray retainer at both ends in the lateral direction of the tray, the notch portion having a width larger than a width of the tray retainer. 4. The disk device according to claim 2, wherein one end portion and the other end portion in the lateral direction of the disk drive are formed so as to have different formation positions.