JPH09326192A - Recording disk loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make this device the constitution in which the assembling an dissembling works of the device are efficiently performed and also in which a satisfactory hermiticity for preventing dust is obtainable. SOLUTION: An elastic sheel member 72 is mounted on the upper ends of the side wall parts 4b of a base 4 and when a top cover 28 is inserted to the base 4 by directing the side wall parts 28a of the cover downward, the rectangular holes 71 of the top cover enter projected parts 70 of the side wall part 4b in the base 4 and, then, lower sides of the projected parts 70 are joined with the lower sides of the rectangulart holes 71. The elastic sheel part 72 imparts an upward energizing force to the top cover 28 in a state in which it covers the upper open part of the base 4 and the a part of outer sides of the side wall parts 4b by the top cover 28 and this force is applied to joined parts between the lower sides of the projected parts 70 and the lower side parts of the rectangular holes 70, and these joined states are maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording disk provided with a mechanism for loading and unloading a recording disk such as an optical disk and a magnetic disk at a predetermined position for recording / reproducing. The present invention relates to a loading device, and more particularly to a structure for attaching and removing a dustproof cover.

[0002]

2. Description of the Related Art In a recording disk loading device, allowing dust to enter causes damage to the recording portion of the recording disk and also adversely affects recording / reproduction. Structural measures have been made to prevent entry into the space. Particularly, in an apparatus using a recording disk having a high recording density, it can be said that the dustproof means is indispensable. Usually, the loading mechanism section including the recording / reproducing section is covered with a dustproof cover.

For example, in the magnetic disk device disclosed in Japanese Patent Laid-Open No. 64-79986, the upper and lower surfaces, left and right surfaces and the rear surface of the main mechanism part are dust-proofed except for the disk insertion side of the main mechanism part. It is surrounded by a cover.

[0004]

However, in the conventional device, the dustproof cover is fixed by a large number of screws, and there is a problem that the workability of assembling and disassembling the dustproof cover is poor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a recording disk loading device having a structure which has good workability in assembling and disassembling and which can obtain good airtightness for dust prevention.

[0006]

In order to achieve the above object, the present invention is a mechanism for moving a recording disk from an insertion portion to a loading position to bring it into a loading state, and releasing the loading state to move it to an ejection position. In a recording disk loading device comprising a base for accommodating the base and a top cover for covering the upper open portion of the base, a bottom portion of the base and a side wall portion extending upward from a side end of the bottom portion. The top cover is formed by an upper surface portion and a side wall portion hanging downward from a side edge of the upper surface portion, and the top cover has an upper opening portion and a side wall portion at the upper end of the side wall portion of the base. An elastic sealing material that makes elastic contact with the inner wall of the top surface of the top cover when a part of the outer surface of the top cover is covered. A square hole is provided, and a side wall portion of the base is provided with a protrusion protruding outwardly and inserted into the square hole and abutting the lower side of the square hole. By covering from above, the square holes provided in those side walls and the projections are joined, and the top cover is urged upward by the repulsive force of the elastic sealing material, so that the above-mentioned joining is maintained. Therefore, the top cover and the base can be firmly fixed to each other without using screws, and since the elastic sealing material is interposed between the top cover and the base, the airtightness is good. Therefore, an excellent dustproof effect can be obtained.

A recess is provided in the side wall of the base in the vicinity of the protrusion, and when the top cover covers the upper open portion of the base and a part of the outer side of the side wall, the lower end of the side wall of the top cover is covered. Is located substantially in the vertical center of the recess, and the tip of the disassembling jig is inserted into the recess of the base to lift the lower end of the side wall of the top cover. The joint between the square hole and the protrusion installed in the base can be easily released, and the top cover can be easily removed from the base.

A recess is provided in the side wall of the base in the vicinity of the protrusion, and the top cover is located at a position corresponding to the recess when the upper open portion of the base and an outer part of the side wall are covered by the top cover. By providing a cutout portion whose lower side is opened in the side wall portion of the cover and by arranging the upper side of the cutout portion to be positioned substantially in the vertical center of the concave portion, the tip of the jig can be moved in the same manner as described above. When the lower end of the side wall portion of the top cover is inserted into the recess of the base and the lower end of the side wall portion of the top cover is opened by the presence of the notch portion, the jig is inserted into the portion.
The insertion is guided and the right and left locking is regulated, so that the jig can easily and reliably release the joint between the square hole and the protrusion provided near the recess. , Workability for removing the top cover from the base is improved.

Also, by covering the periphery of the unit body of the base and the top cover in the assembled state with a frame and providing a through hole at a position corresponding to the recess of the base in the frame, only the top cover is provided from the outside of the frame. Can be removed from the base as described above, and it is not necessary to disassemble the individual members, which improves the disassembly workability.

Further, as the through hole of the frame, a processing hole formed for providing a bending piece for mounting a vibration isolating rubber provided on the frame and having a vibration isolating function for the device is used, Since it is not necessary to provide such a through hole, the structure can be simplified.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a loading unit in an optical disk driver device for explaining the configuration of the first embodiment of the present invention. 1 is a known recording disk in which a part of the lower surface is open. A holder for holding the stored disk cartridge, 2 is a flat carrier slidably provided on the holder 1, and 3 are provided on both sides of the carrier 2 so as to face each other so that they are located outside the holder 1. The plate-like cams 4 are provided on the lower surface side of the holder 1 and are concave bases formed from the bottom surface portion 4a and the side wall portions 4b. Each cam 3 is parallel to the cartridge insertion direction A. Further, the rotary load cams 5 are provided as a biasing means between the front and rear cams 3, respectively.

The rotating load cam 5 has a hole portion 7 which is rotatably loosely fitted in a locking pin 6 provided on the base 4 and a pin pushing portion 9 which comes into contact with a holder pin 8 provided on the holder 1.
And a hook engaging portion 10 are formed. The locking pin 6 and the holder pin 8 are installed at positions approximately in the middle of the reference pins 11 provided in the front and rear of the base 4 in the cartridge insertion direction A. The rotating load cam 5 receives a biasing force of a spring 12 having a hook that locks to the hook locking portion 10, and a pin pushing portion 9 always pushes down the holder pin 8.

The holder 1 has an insertion guide portion 1a for the disc cartridge formed on the lower side thereof, and further, a rotatable shutter opening / closing lever 15 for opening the shutter of the disc cartridge, and a slider 16 interlocked with the movement of the carrier 2. Hook part 19 operated by a link mechanism 18 consisting of a lever 17, etc.
There are provided a picker 20 which is a cartridge detecting means having a pair, and a pair of collars 22 and the like which slidably receive a pair of guide pins 21 provided upright on the base 4.

A motor unit 25, which is a driving means for driving the carrier 2 back and forth, and vibration-proof rubbers 26 at the four corners of the lower surface are arranged on the base 4, as will be described later.
After assembling the above-mentioned members, a rear cover 27 is provided in the rear opening, a top cover 28 is provided in the opening above the side wall 4b, and a front cover 29 is provided in the front opening. Further, an opening / closing door 31 is provided at the cartridge insertion opening 30 of the front cover 29, and a loading unit 32, which is one airtight chamber as a whole, which will be described in detail later, is formed.

Reference numeral 33 in FIG. 1 is a cartridge detection switch which is provided on the inner rear portion of the holder 1 and is turned on / off by the slider 16.

A V-shaped slit 34 is provided at the rear of the carrier 2.
Is formed, and the lever 17 of the link mechanism 18 is formed in the slit 34.
Of the lever 17 is inserted, and the other end of the lever 17 is inserted into the slit 35 formed in the slider 16.

Each cam 3 has a long hole portion 36 parallel to the cartridge insertion direction A on its side surface, a long groove portion 37 also parallel to the cartridge insertion direction A, and an inclination inclined upward continuously from the long groove portion 37. A groove portion 38 is formed. Slot 36
The first pin 40 provided on the outer side of the holder 1 is inserted into the holder so that the cam 3 can slide and move in parallel to the holder 1 in the cartridge insertion direction A.

The second pin 42 of the base 4 is inserted into the long groove portion 37 and the inclined groove portion 38 of the cam 3 so as to position the holder 1 with respect to the base 4 in the vertical direction. Further, on the lower surface of the base 4, the central window portion 45 and the height of the disc cartridge and the positioning of the front, rear, left and right 4
A single reference pin 11 is provided.

FIG. 2 is an exploded perspective view of a disk drive device equipped with the loading unit 32. Reference numeral 50 denotes a front bezel 51 on the front side and a rear panel 52 on the rear side, and standing wall portions 50a formed on the left and right sides. The frame is provided with the cut and bent portions 53 at two positions (total four positions), and the vibration damping rubbers 26 arranged on the lower surface of the base 4 of the loading unit 32 are fitted to the respective cut and bent portions 53. Let A hole 54 for processing remains in a portion of the standing wall portion 50a where the cut and bent portion 53 is provided.

On the lower surface of the loading unit 32, a spindle motor 55 for rotating the recording disk, an optical pickup 56 for optically recording and reproducing the recording disk, and a linear for moving the optical pickup 56 in the seek direction. Chassis unit with a motor (not shown) etc.
57 is provided and installed in the central window portion 45 of the base 4. With each member stored in the frame 50, the frame 50
The circuit board 58 and the top plate 59 are fixed above the.

A cartridge insertion opening 60, an eject button 61, etc. are provided on the front surface of the front bezel 51. By pushing the eject button 61, the eject switch of the sub circuit board 62 provided at the rear of the front bezel 51.
It turns on (not shown).

The overall structure of the optical disk driver device has been briefly described above. The features of the present embodiment according to the present invention will be described below.

FIG. 3 is an exploded perspective view showing only an essential part of the device of the first embodiment in an enlarged manner. In the concave base 4 having an open upper part, the bottom part 4a has its left and right side ends upward. Two locations on each of the extending side walls 4b (total of 4
A protrusion 70 is provided at a portion) so as to project outward by half piercing (half blanking). This protrusion 70
Has a substantially rectangular shape when viewed from the front, and has an inclined surface so that the lower side projects from the upper side. In the inverted concave-shaped top cover 28 whose lower portion is opened, the protrusions 7 of the side wall portions 28b that hang downward from the left and right side ends of the upper surface portion 28a thereof.
Square holes 71 are provided at positions corresponding to 0 (four positions in total). Reference numeral 72 is a rectangular frame elastic seal member that is placed on the upper end of the side wall portion 4b of the base 4.

FIG. 4 is a cross-sectional view showing an assembled state of the base 4 and the top cover 28. The top cover 28 is attached to the side wall of the base 4 with the elastic sealing material 72 placed on the upper end of the side wall 4b. When the portion 28b is inserted downward, the square hole 71 of the top cover 28 enters the projection 70 of the side wall portion 4b of the base 4, and the lower side of the projection 70 joins with the lower side of the square hole 71. Then, the elastic sealing material 72 is attached to the top cover 28.
When the upper open part of the base 4 and a part of the outside of the side wall part 4b are covered by the above, an upward biasing force is applied to the top cover 28, and this force is applied to the lower side of the protrusion 70 and the square hole 71. The joined state is added to the joining portion with the lower side, and the joined state is maintained. Therefore, the base 4
And the top cover 28 are firmly fixed.

FIG. 5 is a perspective view showing a main part of the second embodiment of the present invention, and FIG. 6 is an A- in FIG. 5 for explaining disassembly.
It is a cross-sectional view of FIG. A, and is different from the configuration of the device of the first embodiment in that a recess 75 is provided in the side wall portion 4b of the base 4 in the vicinity of a portion where the protrusion 70 is installed, and the base 4 is covered by the top cover 28. When covered as described above, the lower end e of the side wall portion 28b of the top cover 28 is located substantially at the vertical center of the recess 75.

Therefore, when the top cover 28 is removed from the base 4, as shown in FIG. 6, the tip of a jig G such as a driver is inserted into the recess 75 and lifted, and the tip of the jig covers the top cover 28. If the lower end e of the side wall portion 28b of 28 is lifted outward, the side wall portion of the top cover 28 is
The square hole 71 of 28b is disengaged from the protrusion 70 of the side wall portion 4b of the base 4, the joint between the protrusion 70 and the square hole 71 is released, and the top cover 28 can be removed.

FIG. 7 is a cross-sectional view showing a modified example of the recess. The recess 75 has a rectangular shape when recessed as shown in FIG. 6, but in the example of FIG. Recess
The cross-sectional shape of 76 is a shape with an inclination that reduces the amount of depression toward the upper side, and by doing so, when removing the top cover 28 similar to the above, the tip of the jig If you insert into the recess 76, the tip will rise along the slope, especially during work,
It is not necessary to lift the tip of the jig, which facilitates the work.

FIG. 8 is a perspective view showing an essential part of the third embodiment of the present invention, and FIG. 9 is a sectional view taken along the line AA in FIG. 8. The difference from the configuration of the device of the second embodiment is that the base is different. The top cover 2 corresponding to the installation position of the concave portion 75 (may be the same as the concave portion 76 of FIG. 7) in the side wall portion 4b of FIG.
The side wall portion 28b of 8 is provided with a cutout portion 80 whose lower side is open. Further, when the base 4 is covered by the top cover 28 as described above, the upper side t of the cutout portion 80 of the top cover 28 is recessed 75. It is configured to be located substantially at the center of the vertical direction.

Therefore, when the top cover 28 is removed from the base 4 and the tip of a jig such as a driver is inserted into the recess 75 and lifted, the tip of the jig is cut out.
Guides the insertion and the cutout
The lateral movement of the upper side t of 80 is restricted, so that the work of lifting the lower end of the side wall portion 28b of the top cover 28 to the outside can be reliably performed.

When installing the recess 75 (the same applies when installing the recess 76), when the loading unit 32 is surrounded by the frame 50 as shown in FIG. 10, the anti-vibration rubber 26 is attached to the frame 50. The recessed portion 75 is installed at a position opposite to the machining hole 54 of the cut and bent portion 53 formed in the standing wall portion 50a as a bending piece for use. By doing so, as shown in FIG. 11, the tip of the jig G can be inserted from the outside of the frame 50 through the processing hole 54 into the recess 75, and the top cover 28 can be removed by removing the frame 50 or the like. Workability improves because it can be performed without removing.

[0032]

As described above, according to the recording disk loading apparatus of the present invention, by covering the top cover from above the base, the square holes and the projections provided on the side walls of the top cover are provided. Since the top cover is urged upward by the repulsive force of the elastic sealing material, the joint is maintained, so the top cover and the base can be firmly fixed without using screws. In addition, since the elastic sealing material is interposed between the top cover and the base, the airtightness is good and an excellent dustproof effect is obtained.

Further, by inserting the tip of the disassembling jig into the recess of the base and lifting the lower end of the side wall of the top cover, it is possible to easily release the joint between the square hole and the protrusion installed near the recess. By doing so, the top cover can be easily removed from the base. Further, it is possible to remove only the top cover from the outside of the frame from the base, and it is possible to improve the disassembly workability by eliminating the need to disassemble the individual members.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a loading unit in an optical disc driver device for explaining a configuration of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of an optical disk driver device equipped with the loading unit of FIG.

FIG. 3 is an exploded perspective view showing only an essential part of the loading unit of FIG. 1 in an enlarged manner.

4 is a cross-sectional view showing an assembled state of the members of FIG.

FIG. 5 is a perspective view showing a main part of a second embodiment of the present invention.

6 is a cross-sectional view taken along the line AA in FIG. 5 for explaining the disassembly of the configuration of FIG.

7 is a perspective view showing a modified example of the recess shown in FIGS. 5 and 6. FIG.

FIG. 8 is a sectional view showing a main part of a third embodiment of the present invention.

FIG. 9 is a sectional view taken along line AA in FIG. 8;

FIG. 10 is a side view showing a state in which the loading unit is incorporated in the frame.

11 is a cross-sectional view for explaining removal of the top cover in the configuration of FIG.

[Explanation of symbols]

1 ... Holder, 2 ... Carrier, 4 ... Base, 27 ... Rear cover, 28 ... Top cover, 29 ... Front cover, 32 ... Loading unit, 50 ... Frame,
53 ... Cutting / bending part, 54 ... Hole for processing, 57 ... Chassis unit, 70 ... Projection, 71 ... Square hole, 72 ... Elastic sealing material, 75 ... Recess, 80 ... Notch part.

Claims (5)

[Claims] 1. A base for accommodating a mechanism for moving a recording disk from an insertion portion to a loading position to bring it into a loading state, and a mechanism for releasing the loading state to an ejection position, and an upper opening portion of the base. In a recording disk loading apparatus including a top cover, the base is formed by a bottom surface portion and a side wall portion extending upward from a side end of the bottom surface portion, and the top cover is formed by the top surface portion and the top surface portion. A side wall portion that hangs downward from a side end, and an upper end of the side wall portion of the base covers the upper open portion of the base and an outer side portion of the side wall portion by the top cover. An elastic sealing material that is in elastic contact with the inner wall of the upper surface is arranged, a square hole is provided in the side wall of the top cover, and the side wall of the base is projected outward. A recording disk loading device comprising a protrusion that is inserted into the square hole and abuts on the lower side of the square hole. 2. The lower end of the side wall portion of the top cover when a recess is provided in the side wall portion of the base in the vicinity of the protrusion, and the top open portion of the base and the outer side portion of the side wall portion are covered by the top cover. 2. The recording disk loading device according to claim 1, wherein the recording disk loading device is configured so as to be located substantially at the center of the recess in the vertical direction. 3. A recess is provided in the side wall of the base in the vicinity of the projection, and the top cover is located at a position corresponding to the recess when the top open portion of the base and an outer part of the side wall are covered by the top cover. 2. The recording disk according to claim 1, wherein the side wall portion of the cover is provided with a cutout portion whose lower side is opened, and the upper side of the cutout portion is located substantially at the center of the recess in the vertical direction. -Loading device. 4. A frame surrounding the unit body of the base and the top cover in an assembled state is covered with a frame, and a through hole is provided at a position corresponding to the concave portion of the base in the frame. 3. The recording disk loading device described in 3. 5. The through hole of the frame is a processing hole formed to provide a bending piece for mounting an anti-vibration rubber, which is provided on the frame and has an anti-vibration function for the device. The recording disk loading device according to claim 4.