JP3784827B2 - Disc cartridge - Google Patents

Description

  The present invention relates to a disk cartridge such as an optical disk cartridge or a magnetic disk cartridge, and more particularly to a disk cartridge excellent in dust resistance.

  Conventional disk cartridges generally have a structure in which a recording disk is rotatably accommodated in a cartridge case, and a head access port formed in the cartridge case is opened and closed by a shutter.

For example, the following patent documents can be cited regarding this type of disk cartridge.
JP-A-10-144033

  However, the conventional disk cartridge prevents dust from entering the cartridge case with a single shutter. However, this is not necessarily excellent in dustproofness, and there is a problem in reliability.

  An object of the present invention is to eliminate such drawbacks of the prior art and to provide a highly reliable disk cartridge having excellent dust resistance.

In order to achieve the above object, the present invention has a concave outer side bridge portion which has an outer side head access port and a drive shaft insertion hole and which is further lowered on the upstream side in the cartridge insertion direction of the outer side head access port. An outer shell,
A shutter that opens and closes the outer head access port;
The inner side head access port and the inner side head access port have a concave inner side bridge portion and an arcuate tooth portion which are lowered to the outer periphery, and the outer shell drive shaft insertion hole is centered in the outer shell. A disc cartridge having an inner shell that is rotatably housed as
When the disc cartridge is inserted into the recording / reproducing apparatus, the inner shell is rotated via the arcuate teeth, and the outer head access port, the inner head access port, the outer bridge portion, and the inner bridge portion are rotated. The head access is enabled by matching the side bridge portion.

  As described above, in the present invention, when the disk cartridge is not used, the inner head access port is located away from the outer head access port, the outer head access port is blocked by the shutter, and the inner head access port is Since it is closed by a part of the outer shell and has a double dustproof structure, it is possible to provide a highly reliable disk cartridge with excellent dustproofness.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a plan view of a disk cartridge such as MO, FIG. 2 is a front view of the disk cartridge, FIG. 3 is a left side view of the disk cartridge, FIG. 4 is a right side view of the disk cartridge, and FIG. FIG. 6 is an exploded perspective view of the disk cartridge.

  The disc cartridge includes an outer shell 1, an inner shell 2 disposed inside the outer shell 1, a recording disc 3 (see FIG. 6) rotatably housed inside the inner shell 2, and the outer shell. 1 is mainly composed of a shutter 4 slidably supported on the outside of 1 and a slider 5 connected to the shutter 4.

  The outer shell 1 is composed of a combination of a first outer shell 6 and a second outer shell 7, and the outer shells 6 and 7 are screwed or ultrasonically welded.

  7 to 14 are views showing the first outer shell, FIG. 7 is a plan view of the first outer shell, FIG. 8 is a front view of the first outer shell, FIG. 9 is a left side view of the first outer shell, FIG. 10 is a right side view of the first outer shell, FIG. 11 is a rear view of the first outer shell, FIG. 12 is a bottom view of the first outer shell, FIG. 13 is a perspective view seen from the upper side of the first outer shell, and FIG. FIG. 3 is a perspective view seen from below the first outer shell.

  15 to 22 are views showing the second outer shell, FIG. 15 is a plan view of the second outer shell, FIG. 16 is a front view of the second outer shell, FIG. 17 is a left side view of the second outer shell, FIG. 18 is a right side view of the second outer shell, FIG. 19 is a rear view of the second outer shell, FIG. 20 is a bottom view of the second outer shell, and FIG. 21 is a perspective view as viewed from above the second outer shell, FIG. FIG. 5 is a perspective view seen from below the second outer shell.

  A drive shaft insertion hole 8 is provided at substantially the center of the first outer shell 6 and the second outer shell 7, and an outer side head access port 9 is formed on the upstream side in the disk cartridge insertion direction. A concave outer bridge portion 10 that is further lowered is provided on the upstream side in the disk cartridge insertion direction.

  As shown in FIGS. 12 and 20, slider guide portions 11 extending linearly are formed on both sides of the outer bridge portion 10. 12, 14, 20, and 22, positioning protrusions 12 are provided at equal intervals around the drive shaft insertion hole 8 on the inner surfaces of the first outer shell 6 and the second outer shell 7. Yes.

  The inner shell 2 is composed of a combination of a first inner shell 13 and a second inner shell 14. 23 to 28 are views showing the first inner shell, FIG. 23 is a plan view of the first inner shell, FIG. 24 is a front view of the first inner shell, FIG. 25 is a right side view of the first inner shell, FIG. 26 is a bottom view of the first inner shell, FIG. 27 is a perspective view seen from the upper side of the first inner shell, and FIG. 28 is a perspective view seen from the lower side of the first inner shell.

  29 to 34 are views showing the second inner shell, FIG. 29 is a plan view of the second inner shell, FIG. 30 is a front view of the second inner shell, FIG. 31 is a right side view of the second inner shell, FIG. 32 is a bottom view of the second inner shell, FIG. 33 is a perspective view seen from the upper side of the second inner shell, and FIG. 34 is a perspective view seen from the lower side of the second inner shell.

  A hub insertion hole 15 is formed in the central portion of the first inner shell 13 and the second inner shell 14, and an inner side head access port 16 is provided near the hub insertion hole 15, and the outer peripheral portion of the inner side head access port 16 is further lowered. A concave inner side bridge portion 17 is formed.

  As shown in FIGS. 26, 28, 32, and 34, a disk-shaped disc accommodating recess 18 is provided inside the first inner shell 13 and the second inner shell 14. The recording disk 3 accommodated in the disk accommodating recess 18 has a hub 19 at the center as shown in FIG. 35, and the upper and lower ends of the hub 19 are inserted through the hubs of the first inner shell 13 and the second inner shell 14. It is inserted through the hole 15.

  An arcuate tooth portion 20 and a connecting hole 21 are formed on the outer peripheral portion of the first inner shell 13, and a connecting pin 22 provided on the outer peripheral portion of the second inner shell 14 is inserted into the connecting hole 21, The inner shell 13 and the second inner shell 14 are combined.

  FIG. 35 is an exploded perspective view of the inner shell assembly. 36 to 41 show the state when the shutter is fully opened. FIG. 36 is a plan view of the inner shell assembly, FIG. 37 is a front view of the inner shell assembly, FIG. 38 is a right side view of the inner shell assembly, and FIG. 40 is a bottom view of the inner shell assembly, FIG. 40 is an enlarged view of FIG. 39A, and FIG. 41 is a cross-sectional view taken along line 40B-B.

  42 to 45 show the state when the shutter is fully closed. FIG. 42 is a plan view of the inner shell assembly, FIG. 43 is a bottom view of the inner shell assembly, FIG. 44 is an enlarged view of the portion 43C, and FIG. It is sectional drawing on the 44D-D line.

  As shown in FIG. 35, a C-ring 24 is installed above the hub insertion hole 15 of the first inner shell 13 and below the hub insertion hole 15 of the second inner shell 14 via a disc pressing member 23, respectively. .

  46 is a plan view of the disk pressing member, FIG. 47 is a front view of the disk pressing member, FIG. 48 is a bottom view of the disk pressing member, FIG. 49 is a perspective view of the disk pressing member viewed from above, and FIG. It is the perspective view which looked at from the lower side.

  As shown in these drawings, the disk pressing member 23 has an annular shape, has a disk pressing portion 25 of a ridge, and a plurality of protruding portions 26, and an inclined surface 27 is formed on the protruding portion 26. Each protrusion 26 is provided with a rotation prevention hole 28.

  51 is a plan view of the C ring, FIG. 52 is a front view of the C ring, FIG. 53 is a bottom view of the C ring, FIG. 54 is a perspective view of the C ring viewed from above, and FIG. FIG.

  The C ring 24 is provided with a plurality of projecting portions 29 projecting inward, and inclined surfaces 30 are formed on both sides thereof. A connecting pin 31 protrudes in the vicinity of the protruding portion 29.

  As shown in FIG. 23 and FIG. 27 and FIG. 29 and FIG. 33, a disk pressing member accommodating portion 32 that is lowered by one step is formed on the outer periphery of the hub insertion hole 15 of the first inner shell 13 and the second inner shell 14. A plurality of inclined portions 33 are provided in the circumferential direction thereof. A C-ring accommodating portion 34 is formed on the outer side in the radial direction of the disc pressing member accommodating portion 32, and a plurality of through holes 35 are provided in the circumferential direction thereof.

  56 is a plan view of the shutter, FIG. 57 is a front view of the shutter, FIG. 58 is a left side view of the shutter, and FIG. 59 is a perspective view of the shutter.

  The shutter 4 is made of a thin metal plate, and includes two parallel extending flat plate portions 36 and 36 for opening and closing the drive shaft insertion hole 8 and the outer side head access port 9 of the outer shell 1, and the base end portion of the flat plate portion 36. It has an end face plate portion 37 to be connected, and the side surface is substantially U-shaped as shown in FIG.

  Near the base end portion of the flat plate portion 36, a plurality of locking claws 38 extending toward the end face plate portion 37 side are provided. Although not shown, the locking claw 38 is bent slightly inward. As shown in FIG. 57, a cutout 39 cut inward is formed at one end edge of the end face plate portion 37.

  Fig. 60 is a plan view of the slider, Fig. 61 is a front view of the slider, Fig. 62 is a left side view of the slider, Fig. 63 is a right side view of the slider, Fig. 64 is a rear view of the slider, and Fig. 65 is a perspective view of the slider. is there.

  The slider 5 includes a shutter support portion 41 having a plurality of locking protrusions 40 with which the tip end portions of the locking claws 38 of the shutter 4 abut, and the slider guide portion 11 of the outer case 1 provided inside the shutter support portion 41. A sliding portion 42 that engages with the sliding portion 42, a rack portion 43 that protrudes from the sliding portion 42 to the opposite side to the shutter opening direction, and a spring hooking portion 44 that is provided on the opposite side of the sliding portion 42 from the rack portion 43. Have. As shown in FIG. 61, a shutter opening / closing recess 52 is formed in front of the shutter support portion 41.

  As shown in FIG. 6, a support shaft 45 protrudes in the vicinity of the outer head access port 9 of the second outer shell 7, and a pinion 46 is rotatably supported thereon. In the pinion 46, a first gear 47 having a small diameter and a second gear 48 having a large diameter are integrally formed. As shown in FIGS. 66 and 67, the first gear 47 has a rack portion 43 of the slider 5 and a second gear 48 has a second gear 48. It meshes with the arcuate teeth 20 of the inner shell 2.

  As shown in FIGS. 66 and 67, one end 49a of the coil spring 49 is locked to the spring hooking portion 44 of the slider 5, and the other end 49b of the coil spring 49 is locked to the spring locking portion 50 of the second outer shell 7. The

Next, the assembly sequence of the disk cartridge will be described.
As shown in FIG. 6, the recording disk 3 is housed inside, and the inner shell 2 with the disk pressing member 23 and the C ring 24 mounted on the upper and lower surfaces is placed on the second outer shell 7. Then, by inserting the positioning protrusion 12 provided in the second outer shell 7 into the rotation prevention hole 28 provided in the lower disk holding member 23, the lower disk holding member 23 is prevented from rotating. Is positioned.

  66, the slider 5, the pinion 46, the coil spring 49, the light protector 51, and the like are set at predetermined positions on the second outer shell 7.

  Next, the first outer shell 6 is overlaid on the second outer shell 7, and the positioning protrusion 12 provided on the first outer shell 6 is moved to the rotation prevention hole 28 provided on the upper disk pressing member 23. Is inserted so that the upper disk pressing member 23 is positioned so as not to rotate. Then, the outer shell 1 is configured by fastening the first outer shell 6 and the second outer shell 7 with screws.

  Thereafter, the shutter 4 is externally fitted toward the outer shell 1 from the free end side of the flat plate portion 36 opposite to the end face plate portion 37 of the shutter 4. In this state, the locking protrusions 40 of the shutter 4 protrude from the front end surface of the outer shell 1, so that when the shutter 4 is inserted, the distal end portion of the locking claw 38 provided on the shutter 4 is attached to the shutter support portion 41. It gets over the locking protrusion 40 and comes into contact with the inner surface of the locking protrusion 40. As a result, the shutter 4 is supported by the slider 5 and the assembly of the disk cartridge is completed.

Next, the operation of this disk cartridge will be described.
68 to 72 are views showing the state of the disk cartridge when the shutter is fully closed, FIG. 68 is a plan view of the disk cartridge, FIG. 69 is a front view of the disk cartridge, and FIG. 70 is a cross-sectional view taken along the line E-E in FIG. 71 is a cross-sectional view taken along line 68F-F, and FIG. 72 is an enlarged cross-sectional view of the portion shown in FIG. 70G.

  73 to 77 are views showing the state of the disk cartridge when the shutter is fully opened, FIG. 73 is a plan view of the disk cartridge, FIG. 74 is a front view of the disk cartridge, and FIG. 75 is a cross-sectional view taken along the line H-H in FIG. 76 is a cross-sectional view taken along the line I-I in FIG. 73, and FIG. 77 is an enlarged cross-sectional view of the portion 75J in FIG.

  78 to 83 are diagrams for explaining the opening operation of the shutter. FIGS. 78 and 79 are a plan view and a front view showing a state in the middle of inserting the disk cartridge into the drive device, and FIGS. FIG. 82 and FIG. 83 are a plan view and a front view showing a fully opened state of the shutter, respectively.

  As shown in FIG. 68, when the drive shaft insertion hole 8 and the outer side head access port 9 of the outer shell 1 are closed by the shutter 4, the pinion 46 and the rack portion 43 and the pinion 46 and the arcuate hub 20 are shown in FIG. The inner side head access port 16 of the inner shell 2 is in a position completely separated from the outer side head access port 9 of the outer shell 1 (see FIG. 68).

  Therefore, the outer side head access port 9 is covered by the shutter 4 from the outside and covered by the outer surface of the inner shell 2 from the inside, while the inner side head access port 16 is covered by the inner surface of the outer shell 1. And has excellent dust resistance.

  Further, the protrusion 29 provided on the C-ring 24 rides on the protrusion 2 of the disk pressing member 23. Therefore, the disk pressing member 23 is pressed against the recording disk 3 by the C-ring 24, as shown in FIG. The clamp area corresponding to the inner periphery of the recording disk 3 is sandwiched from both sides by the disk pressing portion 25 of the disk pressing member 23, and the recording disk 3 is fixed.

  Therefore, the recording disk 3 can be protected from external force such as impact. Although the drive shaft insertion hole 8 of the outer shell 1 is closed by the shutter 4, the disk pressing portion 25 of the disk pressing member 23 is brought into close contact with the clamp area of the recording disk 3, so that the drive shaft insertion hole 8 extends from the drive shaft insertion hole 8. Intrusion of dust can be prevented double.

  By attaching the shutter 4 to the slider 5, as shown in FIG. 69, the shutter opening / closing recess 52 of the slider 5 is exposed from the notch 39 provided in the shutter 4. Further, by combining the first outer shell 6 and the second outer shell 7, a slit 54 is formed on the front surface of the outer shell 1.

  As shown in FIG. 78, two shutter opening members 53a and 53b moving in opposite directions are waiting in the drive device. When the disc cartridge is inserted into the drive device along the arrow K direction with the end face plate portion 37 of the shutter 4 first, the tip of one shutter opening member 53a is inserted into the shutter opening / closing recess 52 of the lighter 5, The tip of the other shutter opening member 53b is inserted into the end of the slit 54 of the outer shell 1 (see FIGS. 80 and 81).

  When the disc cartridge is further inserted into the drive device, the shutter opening member 53a moves in the direction of arrow La and the shutter opening member 53b moves in the direction of arrow Lb against the elasticity of the coil spring 39, respectively.

  As the shutter opening member 53a moves, the slider 5 (shutter 4) similarly moves in the direction of the arrow La, and the shutter 4 is opened. When the slider 5 moves, the pinion 46 rotates in the direction of the arrow M as shown in FIG. 66, and the inner shell 2 rotates in the direction of the arrow N along with this, so that the shutter 4 is fully opened as shown in FIGS. Thus, the inner side head access port 16 of the inner shell 2 matches the outer side head access port 9. In this state, the optical head can access the upper head access ports 9 and 16, and the floating magnetic head can access the lower head access ports 9 and 16, respectively.

  Since the C ring 24 is connected to the inner shell 2 through the connecting pin 31, the C ring 24 rotates together with the rotation of the inner shell 2, and the inclined surface 30 of the C ring 24 and the disk pressing member 23 are inclined. In cooperation with the surface 27, the disk pressing member 23 is pushed away from the recording disk 3. Since the disk pressing member 23 is stopped by the positioning protrusion 12 of the outer shell 1, the disk pressing member 23 does not rotate and moves in the axial direction of the positioning protrusion 12 even when the inner shell 2 and the C ring 24 rotate. Just do it.

  As a result, as shown in FIG. 77, the disk pressing portion 25 of the disk pressing member 23 is separated from the recording disk 3, the recording disk 3 becomes free, and the spindle of the drive device engages with the hub 19 of the recording disk 3. Thus, the recording disk 3 is rotated.

  When opening the shutter 4, the other shutter opening member 53 b only moves in the slit 54 of the shutter 4 and does not participate in the opening operation of the shutter 4. When the disk cartridge is a double-sided recording type and the disk cartridge is turned over and inserted into the drive device, this other shutter opening member 53b is engaged with the shutter opening / closing recess 52 and is involved in the opening operation of the shutter 4. One shutter opening member 53a only moves in the slit 54 of the shutter 4.

  When the disk cartridge is taken out from the drive device, the operation is completely opposite to that described above. Finally, the drive shaft insertion hole 8 and the outer side head access port 9 of the outer shell 6 are closed by the shutter 4 as shown in FIG. Then, the inner shell 2 returns to the position shown in FIG. 66, and the recording disk 3 is clamped and fixed from both sides by the disk pressing member 23 as shown in FIG.

  In the present embodiment, the inner shell 2 and the C ring 24 are separated from each other, but both can be integrally formed.

  In the present embodiment, the shutter 4 and the slider 5 are separated from each other, but both can be integrally formed.

  In the present embodiment, the C ring 24 is used, but an O ring may be used.

  Although the present embodiment has been described with respect to a magneto-optical disk cartridge, the present invention is also applicable to other optical disk cartridges and magnetic disk cartridges.

1 is a plan view of a disk cartridge according to an embodiment of the present invention. It is a front view of a disk cartridge. FIG. 4 is a left side view of the disc cartridge. FIG. 4 is a right side view of the disk cartridge. It is a rear view of a disk cartridge. It is an exploded perspective view of a disk cartridge. It is a top view of the 1st outer shell. It is a front view of a 1st outer shell. It is a left view of a 1st outer shell. It is a right view of a 1st outer shell. It is a rear view of a 1st outer shell. It is a bottom view of the 1st outer shell. It is the perspective view seen from the upper side of the 1st outer shell. It is the perspective view seen from the lower side of the 1st outer shell. It is a top view of the 2nd outer shell. It is a front view of the 2nd outer shell. It is a left view of a 2nd outer shell. It is a right view of a 2nd outer shell. It is a rear view of a 2nd outer shell. It is a bottom view of the 2nd outer shell. It is the perspective view seen from the upper side of the 2nd outer shell. It is the perspective view seen from the lower side of the 2nd outer shell. It is a top view of the 1st inner shell. It is a front view of the 1st inner shell. It is a right view of the 1st inner shell. It is a bottom view of the 1st inner shell. It is the perspective view seen from the upper side of the 1st inner shell. It is the perspective view seen from the lower side of the 1st inner shell. It is a top view of the 2nd inner shell. It is a front view of the 2nd inner shell. It is a right view of the 2nd inner shell. It is a bottom view of the 2nd inner shell. It is the perspective view seen from the upper side of the 2nd inner shell. It is the perspective view seen from the lower side of the 2nd inner shell. It is a disassembled perspective view of an inner shell assembly. It is a top view of an inner shell assembly. It is a front view of an inner shell assembly. It is a right view of an inner shell assembly. It is a bottom view of an inner shell assembly. FIG. 39B is an enlarged view of part A. It is sectional drawing on the FIG. 40B-B line. It is a top view of an inner shell assembly. It is a bottom view of an inner shell assembly. FIG. 43C is an enlarged view of a portion C. FIG. 44 is a cross-sectional view taken along the line DD. It is a top view of a disk pressing member. It is a front view of a disk pressing member. It is a bottom view of a disk pressing member. It is the perspective view which looked at the disk pressing member from the upper side. It is the perspective view which looked at the disk pressing member from the lower side. It is a top view of C ring. It is a front view of a C-ring. It is a bottom view of C ring. It is the perspective view which looked at C ring from the upper part. It is the perspective view which looked at C ring from the lower side. It is a top view of a shutter. It is a front view of a shutter. It is a left view of a shutter. It is a perspective view of a shutter. It is a top view of a slider. It is a front view of a slider. It is a left view of a slider. It is a right view of a slider. It is a rear view of a slider. It is a perspective view of a slider. FIG. 4 is a perspective view showing a part of the inside of the disk cartridge when the shutter is fully closed. FIG. 4 is a perspective view showing a part of the inside of the disk cartridge when the shutter is fully opened. 2 is a plan view of a disk cartridge. FIG. It is a front view of a disk cartridge. FIG. 69 is a cross-sectional view taken along the line E-E. FIG. 68 is a cross-sectional view taken along the line F-F. It is an expanded sectional view of the FIG. 70G section. 2 is a plan view of a disk cartridge. FIG. It is a front view of a disk cartridge. FIG. 73 is a cross-sectional view taken along the line HH. FIG. 73 is a cross-sectional view taken along the line I-I. FIG. 75 is an enlarged cross-sectional view of a portion J. It is a top view which shows the state in the middle of inserting a disc cartridge in a drive apparatus. FIG. 6 is a front view showing a state in the middle of inserting the disk cartridge into the drive device. It is a top view which shows the state just before opening a shutter. It is a front view which shows the state just before opening a shutter. It is a top view which shows the fully open state of a shutter. It is a front view which shows the fully open state of a shutter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outer shell 2 Inner shell 3 Recording disk 4 Shutter 5 Slider 6 1st outer shell 7 2nd outer shell 8 Drive shaft insertion hole 9 Outer side head access port 10 Outer side bridge part 11 Slider guide part 12 Positioning protrusion 13 1st inner Shell 14 Second inner shell 15 Hub insertion hole 16 Inner side head access port 17 Inner side bridge portion 18 Disc receiving recess 19 Hub 20 Arc-shaped tooth portion 21 Connecting hole 22 Connecting pin 23 Disc pressing member 24 C ring 25 Disc pressing portion 26 Protruding portion 27 Inclined surface 28 Rotation preventing hole 29 Protruding portion 30 Inclined surface 31 Connecting pin 32 Disc holding member accommodating portion 33 Inclined portion 34 C ring accommodating portion 35 Through hole 36 Flat plate portion 37 End surface plate portion 38 Claw 39 Notch portion 40 Locking protrusion 41 Shutter support section 42 Slide section 43 Rack section 44 Spring hook section 45 Support shaft 46 Pinion 47 First gear 48 Second gear 49 Coil spring 50 Spring locking section 51 Light protector 52 Shutter opening / closing recess 53a, 53b Shutter opening member 54 Slit.

Claims (2)

An outer shell having an outer side head access port and a drive shaft insertion hole, and having a concave outer side bridge portion that is further lowered on the upstream side in the cartridge insertion direction of the outer side head access port;
A shutter that opens and closes the outer head access port;
The inner side head access port and the inner side head access port have a concave inner side bridge portion and an arcuate tooth portion which are lowered to the outer periphery, and the outer shell drive shaft insertion hole is centered in the outer shell. A disc cartridge having an inner shell that is rotatably housed as
When the disc cartridge is inserted into the recording / reproducing apparatus, the inner shell is rotated via the arcuate teeth, and the outer head access port, the inner head access port, the outer bridge portion, and the inner bridge portion are rotated. A disk cartridge characterized in that the head access is possible by matching the side bridge portion.   2. The disk cartridge according to claim 1, wherein the inner shell and the shutter are moved to a position where the head access port of the outer shell is opened in synchronization.

Images